JPH10151306A - Filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically wash off solid matter caught by a filter medium though line constitution is simple, compact and inexpensive. SOLUTION: This device is constituted of plural filter units A, A,.... Each filter unit A is constituted of first to fourth plate-like elements 1, 20, 30, 40. The second element is provided with a filter medium 22. The plate-like elements 1, 20, 30, 40 are provided with through holes 3, 23, 33, 43 for water to be treated through which water to be treated before treatment flows, filtrate through holes through which filtered treated water flows, filtrate through holes 4, 24, 34, 44 through which filtered treated water flows, and washing water through holes 5, 25, 35, 45 through which washing water such as water to be washed and water flows, and are placed one upon another in a laminate with these holes being consistent with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtering device provided with a filter medium for filtering and removing solids such as suspended matters in water to be treated, and capable of washing out solids captured by the filter medium. The present invention relates to a filtration device suitable as a solid / liquid separation device for, but not limited to, bath water, pool water, tap water, well water, and water for use in buildings and condominiums.

[0002]

2. Description of the Related Art A filter or a filter for capturing and removing solids in a liquid, that is, a filter or a filter for capturing and removing solids in a liquid is well known without mentioning a document name. And a filter medium provided therein. Therefore, when the to-be-treated water is supplied from the supply port of the filtration case, solids in the to-be-treated water are captured by the filter medium, and the filtered treated water is drained from the drain port of the filtration case. By the way, if the filtering operation as described above is continued, the filter medium is clogged with the captured solids, and the filtering operation cannot be continued. Therefore, a so-called back-washing type filtration device is known, in which water to be treated or washing water is flowed in a reverse direction to the filter medium to wash off solid substances attached to the filter medium. Has proposed.

[0003]

As described above, according to the backwashing filtration device, the fixed matter trapped in the filter medium can be washed off without relying on humans, and is effectively used. In particular, the filter medium proposed by the present applicant is formed of a flexible material such as a filter cloth, and the filter medium is separated from the inner wall of the filter case body by a predetermined distance at a substantially central portion of the filter body. When the fluid is supplied from the other side during backwashing, the filter medium is separated from the inner wall of the filter case body and becomes free. As a result, the way in which the filter medium bends or bends is not uniform, and the position of the bend also changes every moment. Therefore, the size, shape, and the like of the eyes of the filter medium also change. Since the mesh of the filter medium changes in this way, there is an advantage that solid matter clogging the mesh of the filter medium is released and removed only by backwashing.

[0004] As described above, according to the backwashing filtration device proposed by the present applicant, there is no problem in terms of the backwashing action, but it is improved in view of the size and cost of the device. Room is allowed. In other words, wash water when backwashing,
Since the water to be treated must flow in a direction opposite to the flowing direction, a pipe configuration for that purpose is required, and a switching valve and the like are required accordingly, which may increase the size and cost of the filtration device. In particular, human hair, fibers, dirt, etc., are various types of solid matter captured by the filter medium provided in the circulation system of the bath water, but backwashing is difficult for solid substances such as human hair which are difficult to wash off. Even if it is unavoidable, using a backwash type filtration device even for solids such as dirt that is relatively easy to wash off is not a good idea because the device is large and expensive as described above. .

On the other hand, the smaller the solid particles contained in the water to be treated, the greater the load on the filter medium. On the other hand, the larger the particle size, the easier the filter medium is to capture and wash off. Before filtering the treated water, it is desirable to carry out a pretreatment such as coagulation of a solid substance. However, in reality, such a pretreatment is not conventionally performed. The present invention has been made in view of the above-described problems of the conventional filtration device or points to be improved,
It is an object of the present invention to provide a filtration device capable of automatically washing out solid matter trapped in a filter medium, despite its simple, compact, and inexpensive pipe configuration. It is another object of the present invention to provide a suitable filtration device provided in the apparatus. Another object of the present invention is to provide a filtering device that does not burden the filter medium.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a filtration unit for filtering water to be treated, a supply unit for supplying the water to the filtration unit, and a filter unit. A drain section for discharging treated water to be treated, and a discharge section for discharging treated water obtained by treating the filtration section, wherein the discharge section is closed and water to be treated is supplied from the supply section to the filtration section. ,
When the treated water filtered by the filtration unit is drained from the drainage unit, and the drainage unit is closed and the supply unit supplies cleaning water such as water to be treated and water to the filtration unit, the filtration unit is treated. The treated water is discharged from the discharge section. According to a second aspect of the present invention, the filtration unit according to the first aspect includes a plurality of filtration units stacked on each other, and each of the filtration units includes a plurality of plate-like elements having a predetermined thickness. A filter medium is provided in one of the elements, and a through-hole for treated water through which treated water before treatment flows, a through-hole for filtered water through which filtered treated water flows, and A cleaning water through-hole through which cleaning water such as water to be treated and water flows is formed, and these through-holes are aligned so as to be stacked one on top of another. According to a third aspect of the present invention, the filtration unit according to the first aspect is formed of a cylindrical filter medium, and the fourth aspect of the invention provides the filtering device according to any one of the first to third aspects, The invention is used in a circulation path for filtering hot water, and the invention according to claim 5 aggregates suspended matter in the water to be treated on the upstream side of the filtration device according to any one of claims 1 to 4. A coagulation sterilizing device that performs a sterilizing action together with is provided.

[0007]

Embodiments of the present invention will be described below.
As shown in FIG. 2, the filtering device R according to the first embodiment is configured by stacking a plurality of filtering units A, A,. And each filtration unit A
As shown in FIG. 1, four first to fourth plate-like elements 1, 20, 30, 40 having a predetermined thickness and substantially the same size are provided.
From a stacked type.

The first plate-like element 1 is provided with a relatively large supply hole 2 through which water to be treated is supplied at a substantially central portion thereof. A relatively small-diameter filtered water through hole 4 through which the filtered treated water passes is formed in the side of the supply through hole 2. The area of the supply through-hole 2 is selected so as to cover a filter, that is, a filter medium 22 described later. Also, the apparent through-hole for treated water (3) is provided in the supply through-hole 2.
And a washing water through hole (5) through which washing water described later passes. The apparent reference numerals of these through-holes are described in parentheses hereinafter.

At a substantially central portion of the second plate-like element 20, a filter medium 22 having a predetermined area is provided. And this filter medium 2
2 around the filter medium 22, the treated water through hole 23 through which the treated water passes before being filtered at an interval from the filter medium 22, the filtered water through hole 24 through which the filtered treated water passes, A cleaning water through hole 25 through which water passes is provided. A relatively large common through hole 32 is also formed substantially at the center of the third plate-shaped element 30. Then, the treated water through hole 33 through which the treated water passes before and below the common through hole 32 is filtered.
And a cleaning water through hole 35 through which the cleaning water passes. The apparent through-hole (34) for filtered water through which the filtered treated water passes is covered by the common through-hole 32.

The fourth plate-shaped element 40 has three through-holes, ie, the through-holes 4 for treated water through which the untreated water passes.
3 and the filtered water through-hole 44 through which the filtered treated water passes
And a cleaning water through hole 45 through which the cleaning water passes. The first to fourth four plate-like elements 1, 10, 2
When the filtration unit A is constructed by superimposing 0, 30, 40 as shown in FIG. 2, these treated water through-holes (3), 23, 33 and 43 are aligned, and similarly, The perforations 4, 24, (3) 4 and 44 are aligned, and the wash water perforations (5), 25, 35 and 45 are similarly aligned.

Next, the operation of the above embodiment will be described. FIG. 2 is a cross-sectional view as viewed in the direction of the arrow E in FIG. 1 for explaining a filtration state. As shown in FIG. 2, first to fourth four plate-like elements 1, 10, 20, 3
A, consisting of a plurality of filtration units A, A,... In FIG. 2, the supply pipe 10 is inserted into the through-hole for treated water (3) of the filtration unit A ′ located at the first stage.
Connect. Also, the filtration unit A ″ located at the last stage
The pipe 11 connected to the to-be-treated water through hole (43) is closed with the lid 12. Further, a filtrate drainage pipe 14 having an open / close valve 13 is connected to the filtrate water through hole (44) of the filtration unit A ″ located at the last stage. Similarly, as shown in FIG. Then, a washing water discharge pipe 17 in which an opening / closing valve 16 is interposed is connected to the washing water through hole (45) of the filtration unit A ″. Thereby, the filtration device R is assembled.

When filtering, the washing water discharge pipe 17 is closed by an opening / closing valve 16 and the opening / closing valve 1 of the filtered water drain pipe 14 is closed.
Open 3 Then, the water to be treated is supplied from the supply pipe 10 to the first-stage filtration unit A ′. Then, a part of the water to be treated supplied to the through-hole for treated water (3), as shown by the solid line arrow in FIG. 2 and the white plate arrow in FIG. From the feed through hole 2 of the plate-shaped element 1 to the filter medium 22 of the second plate-shaped element 20, filtered and passed through the common through-hole 32 of the third plate-shaped element 30, and
Through the filtered water through holes (34), 44 of the plate-like elements 30, 40 of the following filtration unit A, the filtered water through holes 4, 24,
(34), flows to 44. Hereinafter, the filtered water is filtered through the filtered water through holes 4, 2 of each of the filtration units A, A,.
4, (34) and 44 will be drained.

Since the filter medium 22 and the filtered water through-holes 44 have resistance, a part of the supplied water to be treated, that is, the unfiltered water to be treated as shown in FIG. 1, also flows toward the treated water through holes 23, 33, 43, as indicated by the dashed arrows.
Then, it flows to the filtration unit A in the next stage. In this filtration unit A as well, the water is diverted toward the filter medium 22 and the treated water through holes 3, 23, 33, 43 in the same manner. It is filtered in the same manner and flows to the next filtration unit A. Then, in the final filtration unit A ″, the entire amount of the supplied water to be treated is filtered and drained from the filtered water drain pipe 14.

After filtering for a predetermined time as described above,
Alternatively, when the pressure of the water to be supplied to the supply pipe 10 becomes higher than a predetermined value, the filter media 22, 22, ... are washed. FIG. 3 is a cross-sectional view corresponding to a view taken in the direction of the arrow (b)-(b) in FIG. 1 and showing a cleaning state. In this case, the filtered water drain pipe 14 shown in FIG. It is closed by the opening / closing valve 13 and the opening / closing valve 16 of the washing water discharge pipe 17 is opened. Then, the water to be treated or the washing water is supplied from the supply pipe 10 to the first-stage filtration unit A ′. Then, in the filtration unit A, a part of the washing water supplied to the to-be-processed water through-hole 3 flows along the surface of the filter medium 22 of the second plate element 20 as shown by a solid arrow in FIG. Flows downward.
At this time, the solid matter trapped on the surface of the filter medium 22 is washed away. Then, the washing water containing the solid matter is supplied to the washing water through-hole (5) of the first plate-like element 1 and the second plate-like element 20.
Through the washing water through hole 25, the third plate element 30 of the washing water through hole 35 and the fourth plate element 40 of the washing water through the washing water through hole 45. It flows to the water holes (5), 25, 35 and 45.

[0015] Through-holes (5) for cleaning water, 25, 35 and 4
5 has a resistance, a part of the supplied washing water is supplied to the through-hole 2 for the water to be treated as shown by the chain arrow in FIG.
It also flows toward 3, 33 and 43. Then, it flows to the filtration unit A of the next stage. Similarly, in this filtration unit A, the filter medium 22 and the through holes 23, 33,
Divide to 43. Similarly, the surface of the filter medium 22 is washed and flows toward the next filtration unit A. Then, washing water containing solid matter is discharged from the washing water discharge pipe 17 of the final filtration unit A ″.

As described above, according to the present embodiment, the cleaning water discharge pipe 17 is closed by the open / close valve 16 and the supply pipe 1 is closed.
When the water to be treated is supplied from 0, the filtration units A, A,.
The treated water filtered in is discharged from the filtered water drain pipe 14,
When the filtered water drain pipe 14 is closed by the open / close valve 13 and the water to be treated or the washing water is supplied, the filtration units A, A,.
Are washed.

Next, a second embodiment of the present invention will be described with reference to FIG. The filtering device R ′ according to the present embodiment includes:
A cylindrical filter medium is applied. That is, the cylindrical filtration case 40 is vertically divided by the partition plate 41, and a lower part thereof is a supply chamber 42 and an upper part thereof is a drainage chamber 43. A cylindrical filter medium 44 whose periphery is formed of, for example, filter cloth is provided so as to divide these chambers 42 and 43. The upper part of the cylindrical filter medium 44 is open, but the bottom is closed.

A supply pipe 45 for supplying the water to be treated is provided with a direction switching valve 46, and a treatment water supply pipe 47 protruding from the direction switching valve 46 is connected below the supply chamber 42, and is provided with a washing pipe 48. Is connected upward. And the drainage chamber 43
Is provided with a filtered water drain pipe 50 in which an on-off valve 49 is interposed. Further, a washing water discharge pipe 52 provided with an opening / closing valve 51 is provided on the bottom wall of the filtration case 40.

Therefore, the washing water discharge pipe 52 is connected to the on-off valve 5.
1 and the water to be treated is supplied from the supply pipe 45 to the direction switching valve 4.
6 and the water to be supplied to the supply chamber 42 via the water to be treated supply pipe 47, the water to be treated flows as indicated by the solid arrow and the filter medium 4
Filtered at 4. The filtered treated water is discharged from the drain chamber 43 through the filtered water drain pipe 50. When washing the filter medium 44, the filtered water drain pipe 50 is closed by the on-off valve 49,
The on-off valve 51 of the washing water discharge pipe 52 is opened. Then, the water to be treated or the washing water is supplied to the direction switching valve 46 and the washing pipe 48.
Is supplied above the supply chamber 42 as indicated by the arrow at the chain end. Then, the washing water flows down along the surface of the filter medium 44. As a result, the solid matter adhering to the surface of the filter medium 44 is washed away, and is discharged from the cleaning water discharge pipe 52 to the outside.

As described above, also according to the second embodiment, the filter medium 44 can be washed without flowing the washing water in the opposite direction to the time of filtration as in the conventional case. It is apparent that the present invention can be implemented so that both the water to be treated and the cleaning water are supplied above the supply chamber 42 without providing the direction switching valve 46.

Referring to FIG. 5, a third embodiment of the present invention comprising a plurality of cylindrical filter media will be described. The filtering device R ″ according to the present embodiment also includes a cylindrical filtering case 60. The inside of the filtering case 60 is separated into three chambers by upper and lower partition plates 61 and 62, and the uppermost chamber is provided in the supply chamber 63. , An intermediate chamber is a filtered water collecting chamber 64, and a lowermost chamber is a washing water discharge chamber 65. According to the illustrated embodiment, three cylindrical filter media 66, 66,. Are provided so as to penetrate the upper and lower partition plates 61 and 62. Further, a supply pipe 67 is provided in the supply chamber 63, and a filtrate drain pipe in which an opening / closing valve 68 is provided in the filtrate collection chamber 64. 69 are connected to each other, and the bottom wall 70 of the filtration case 60 is provided with a discharge pipe 72 in which an opening / closing valve 71 is interposed.

The filtering device R ″ of the third embodiment operates in substantially the same manner as the filtering device R ′ of the above-described second embodiment. That is, the opening and closing valve 71 of the washing water discharge pipe 72 is closed, When the open / close valve 68 of the filtered water drain pipe 69 is opened and the water to be treated is supplied from the supply pipe 67, the water to be treated supplied from the supply chamber 63 to the inside of the filter media 66, 66,. Are filled with the water to be treated and the pressure rises, so that the water flows through the filter media 66, 66,... To the filtered water collecting chamber 64. Thereby, the treated water is filtered. Drained outside.

When the filter media 66, 66,... Are to be washed, the open / close valve 71 of the washing water discharge pipe 72 is opened and the open / close valve 68 of the filtered water drain pipe 69 is closed. Then, the supply pipe 67
To supply treated water or washing water. Then,
Since the filtered water collecting chamber 64 is filled with the washing water, the washing water passes through the inside of the filter media 66, 66,.
It flows toward 5. As a result, the solid matter trapped in the inner peripheral portions of the filter media 66, 66,... Is washed away and discharged to the outside from the washing water discharge pipe 72.

Next, the first embodiment of the present invention described with reference to FIG.
The following describes examples in which the filtering devices R, R ', and R "according to the third to third embodiments are applied to a filtration circulation system or a filtration / purification circulation system for bath water. Although they are included, they are easily trapped by the filter medium, but have a property that they are hard to fall off once trapped.Therefore, a coarse hair catcher that mainly traps human hair, fiber debris, etc. is provided in the circulation system, The catcher is configured to backwash, as will be described in more detail below, although the bathtub is not shown in the figure, but from which the circulation tube 80 exits, and the circulation tube 80 is a first tube. The first branch 81 is connected to a port a of a first three-way switching valve 83, and is connected to a port b of the first three-way switching valve 83. Is a third one connected to the inlet port j of the hair catcher 85. A fourth pipeline 86, one of which is connected to the port c of the second three-way switching valve 87, is connected to the outlet port g of the hair catcher 85. The branch pipe 86 ′ branched from the fourth pipe 86 is connected to the port c of the third three-way switching valve 88.

The port a of the second three-way switching valve 87 includes:
The second pipe 82 described above is connected to the port b, and the fifth pipe 8 is connected to the port b.
The fifth pipe 89 is connected to the suction port of the pump 90, and the sixth pipe 91 is connected to the discharge port. The sixth pipe 91 is connected to a third three-way switching valve 88.
Port a. Third three-way switching valve 88
Port b and the coagulation sterilizer K described in detail later
They are connected by a pipe 92. The coagulation sterilizer K and the above-mentioned filtration device R (R ′, R ″) are connected to the supply pipe 10.
(45, 67) and a filtering device R (R ', R ")
And the bathtub are connected by a filtered water drain pipe 14 (50, 69).

Next, the operation of the embodiment shown in FIG. 6 will be described. When the bath water is circulated and filtered, the first three-way switching valve 83 has ports b and a, the second three-way switching valve 87 has ports c and b, and the third three-way switching valve 88 Switches to a state in which ports a and b communicate with each other, and starts pump 90. Then, the bath water in the bathtub is circulated by the circulation pipe 80, the first pipe 81, the first three-way switching valve 83, and the third pipe 8 as indicated by solid arrows.
4 and is sucked into the hair catcher 85. In this hair catcher 85, relatively large impurities such as human hair and fibers are removed. Bath water from which impurities have been removed
The liquid is sucked by the pump 90 through the fourth pipe 86, the second three-way switching valve 87 and the fifth pipe 89. And it is discharged. The bath water discharged from the pump 90 is supplied from the third three-way switching valve 88 and the seventh conduit 92 to the filtration device R (R ′, R ″) via the coagulation sterilization device K. The coagulation sterilizer K is not necessarily provided, but when provided, is configured as described below.

When passing through the coagulation sterilizer K, suspended matter in the bath water is coagulated. Bacteria are also killed. The bath water containing the solid matter that has been agglomerated to have a relatively large diameter is filtered in the following filtration device R (R ′, R ″) as described above. From 69), it is sent to the bath tub and circulated and filtered in the same manner.

The filter medium 22 (4) of the filter device R (R ', R ")
4 and 66), the filtered water drain pipe 14 (5
0, 69), and the washing water discharge pipe 17 (52, 7).
Open 2). Thereby, as described above, the filter medium 22 (4
4, 66) is clearly cleaned. The hair catcher 85 contains human hair, which is relatively difficult to wash,
Since impurities such as fibers are trapped, backwash. At this time, the first three-way switching valve 83 has ports b and c, the second three-way switching valve 87 has ports a and b, and the third three-way switching valve 88 has ports a and c. The pump 90 is started by switching to the communication state. Then, the bath water flows as indicated by a chain line arrow, and is supplied to the hair catcher 85 from the outlet g. Therefore, in the hair catcher 85, the bath water or the washing water flows in the opposite direction to that during the filtration, and the trapped impurities float in the bath water. The floating impurities are discharged to the outside together with the washing water through the first three-way switching valve 83 and the discharge pipe 93. It is clear that back water can be supplied by supplying washing water instead of bath water from the circulation pipe 80.

According to the present embodiment, impurities such as human hair and fibers are captured by the hair catcher 85 which has a simple structure and can be constructed at a low cost, and fine suspended matters are aggregated before being filtered by the filtering devices R (R ', R'). )), The filtration device R
(R ′, R ″) can be reduced. In addition, since the diameter of the solid matter is increased due to aggregation, the filter medium 22 (44,
66), it can be easily washed off.

Finally, an embodiment of the coagulation sterilizer K is shown in FIG.
This will be described below. According to the present embodiment, the coagulation sterilizer K includes a pair of conductors 100 and 100 '. The conductors 100 and 100 ′ are formed in a disc shape in order to avoid concentration of electric charge from metal, carbon, conductive rubber, conductive resin, and the like, and are arranged inside the container 101 to face each other with a predetermined interval. . These conductors 100, 10
0 ′ is provided with through holes 102, 10 and 10 through which water to be treated, for example, bath water passes.
2 'are each opened, and are connected to a power source 106 having a voltage of, for example, 6000 volts or more and a frequency of 30 kHz or more, by power supply lines 105 and 105'. Container 10
1 is provided with a supply pipe 103 for water to be treated and a drain pipe 104 below the supply pipe 103. The supply pipe 103 faces the through hole 102 of the conductor 100, and the drain pipe 104 is a conductor. 100 ′ are opposed to the through holes 102 ′.
Therefore, the flow resistance of the water to be treated in the coagulation sterilizer K is small. Note that these tubes 103 and 104 are appropriately grounded by earth lines 107 and 107.

When the coagulating and sterilizing apparatus K is provided in the bath water circulation system as shown in FIG. 6, the supply pipe 103 is the seventh pipe 92, and the drain pipe 104 is the supply pipe 10 (45,
67) However, when a high voltage high frequency is applied to the pair of conductors 100 and 100 ′ and, for example, bath water is supplied from the supply pipe 103, solids in the bath collide with each other due to the high frequency vibration and aggregate. Cause In addition, the charging state of the colloid particles changes due to the potential load, and the colloid particles also aggregate electrically. Furthermore, microorganisms are physically inactivated by high-frequency vibration and sterilized or sterilized. In addition, a potential is applied to the microorganism, and an electron transfer reaction occurs. Then, a malfunction occurs in the electron transfer system in the microorganism, and the respiratory activity decreases. It is also sterilized by this action. In this way, the particles are agglomerated, sterilized, and flow to the next filtration device R (R ′, R ″). In addition, the plate-like elements 1 to 40 of the above-described filtration device R are appropriately formed of a conductive plate and an insulating plate. Alternatively, a high voltage and a high frequency can be applied to the conductive plate.

[0032]

As described above, the filtering apparatus according to the present invention comprises a filtering section for filtering the water to be treated, a supply section for supplying the water to the filtering section, and a treated water treated by the filtering section. And a discharge unit for discharging treated water obtained by treating the filtration unit. When the discharge unit is closed and the water to be treated is supplied from the supply unit to the filtration unit, the treated water filtered by the filtration unit is provided. Is drained from the drainage section, and when the drainage section is closed and cleaning water such as water to be treated and water is supplied from the supply section to the filtration section, the treated water obtained by treating the filtration section is discharged from the discharge section. Therefore, despite the fact that the solid matter trapped in the filter medium can be washed away without relying on humans, the effect unique to the present invention is obtained in that the filtration device can be obtained simply and inexpensively. Can be Further, according to another invention, since the filtering device is used in the circulation path of the bath water, the bath device can be provided compactly and inexpensively. According to yet another aspect of the present invention, since an aggregating and sterilizing apparatus is provided upstream of the filtering apparatus for aggregating suspended matter in the water to be treated and performing a sterilizing action, the load on the filter medium of the filtering apparatus can be reduced. ,
Further, the captured solid can be easily washed away.
In particular, when the water to be treated is bath water, an effect of keeping the bath water sanitary can be obtained without using a special sterilizer such as ozone or an ultraviolet lamp.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view schematically showing components of a filtration device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view in which the components shown in FIG. 1 are stacked and seen from arrows (a) to (a) in FIG.

FIG. 3 is a cross-sectional view in which the components shown in FIG. 1 are similarly stacked, and viewed along arrows (b)-(b) in FIG.

FIG. 4 is a cross-sectional view of a filtration device according to a second embodiment of the present invention.

FIG. 5 is a sectional view of a filtration device according to a third embodiment of the present invention.

FIG. 6 is a perspective view schematically showing a state in which the filtration device according to the embodiment of the present invention is used in a circulation path of hot water.

FIG. 7 is a sectional view showing an embodiment of a coagulation sterilization apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st plate-like element 20 2nd plate-like element 30 3rd plate-like element 40 4th plate-like element 3, 23, 33, 43 Through-hole for treated water 4, 24, 34, 44 Filtration water Through holes for 5,5,35,45 Cleaning water through holes 10,45,67 Supply pipe 22,44,66 Filter media 14,50,69 Filtration water drain pipe 17,52,72 Cleaning water discharge pipe 100,100 ' Conductor R, R ', R "Filtration device R Coagulation sterilization device

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B01D 35/16 B01D 29/04 530A C02F 1/46 29/30 520Z 1/48 29/42 510 35/02 J

Claims (5)

[Claims] 1. A filtration unit for filtering water to be treated, a supply unit for supplying water to the filtration unit, a drainage unit for draining treated water to be treated in the filtration unit, and a filtration unit. And a discharge unit for discharging the treated water. When the discharge unit is closed and the water to be treated is supplied from the supply unit to the filtration unit, the treated water filtered by the filtration unit is drained from the drain unit. When the drainage unit is closed and the treatment unit supplies the cleaning water such as water to the filtration unit from the supply unit, the treated water obtained by treating the filtration unit is discharged from the discharge unit. A filtration device. 2. The filtration unit according to claim 1, wherein the filtration unit includes a plurality of filtration units stacked on each other, and each of the filtration units includes a plurality of plate-like elements having a predetermined thickness. One of them is provided with a filter medium, and these plate-shaped elements have a through-hole for treated water through which untreated water flows, a through-hole for filtered water through which filtered treated water flows, A filtration device having a through hole for washing water through which washing water such as water or water flows, and stacked in a stacked state with these through holes aligned. 3. A filter device according to claim 1, wherein the filter section is formed of a cylindrical filter medium. 4. A filtering device according to claim 1, wherein the filtering device is used in a circulation path for filtering hot water. 5. A filtration device, wherein an agglutination sterilization device is provided upstream of the filtration device according to any one of claims 1 to 4, which aggregates suspended matter in the water to be treated and has a bactericidal action. .