JPH0411906A - Filter - Google Patents

Abstract

PURPOSE:To reduce the amount of water required to wash a filter element and to easily adjust the filtration preciseness by providing the filter element between a pair of perforated supporting plates which are constituted to be allowed freely to approach and to recede relatively. CONSTITUTION:In the filtration mode, the bathtub water introduced from an upper influent opening 42 passes through the upper perforated plate 46, through the filter element 50 of fibrous compressed body of high density from the upper part to the lower, and through the lower perforated plate 48 to reach a lower effluent opening 44, while the filthiness contained in the bathtub water, such as dirt, dust and impurities, is removed during the passage of the filter element 50, and the water is cleaned. The cleaned water is returned to the bathtub from a cleaned water returning opening 12 through the lower effluent opening 44 and a three way valve V2 driven by an electromotor. In the washing mode, vertical and revolving reciprocating motions of the upper perforated plate 46 are repeated to rub and push the filter element 50 in the washing water in a filter tank 40 to carry out washing.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention mainly relates to a filter for cleaning bath water by filtration. However, the object to be filtered is not limited to bath water.

<Prior Art> A schematic configuration of a conventional bathtub filtration system will be described with reference to FIG. 3.

The suction side of a circulation pump 8 is connected to the suction port 4 provided in the bathtub 2 via a hair catcher 6, and the piping system on the discharge side of the circulation pump 8 is branched into two at a three-way switching part a, one side being connected to the other side. is pipe-connected to the upper inlet/outlet 22 of the filter B via the first electric valve Vll, and the other is connected to the lower inlet/outlet 24 of the filter B via the second electric valve V12.
The piping is connected to the A three-way switching section is provided in the piping system between the first electric valve Vll and the upper inlet/outlet 22,
A third electric valve V13 is interposed in the drain pipe 10 branched from this three-way switching section.

A three-way switching section C is provided in the piping system between the second electric valve V12 and the lower entrance/exit 8b, and the three-way switching section C and the clean water flow port 12 to the bathtub 2 are connected via the fourth electric valve V14. The pipes are connected.

The remote controller 14 attached to the wall of the bathroom gives commands for each mode to the sequence controller 16, and the sequence controller 16 controls the circulation pump 8 and the first to fourth electric valves Vl.
l-V14 is controlled according to a predetermined order.

The filter B has the above-mentioned upper entrance/exit 22 at the upper part of the filtration tank 20, and the above-mentioned lower entrance/exit 24 at the lower part, and a perforated partition plate 26 is provided above the lower entrance/exit 24. A large number of granular filter media 28 such as sand are filled as elements. 30 is an automatic air bleed valve.

Next, the operation will be explained.

[Filtration mode]

When the filtration mode is designated by the remote controller 14, the sequence controller 16 controls the first electric valve Vll.
Then, the fourth electric valve V14 is opened to drive the circulation pump 8. Note that the second and third electric valves V1
2. V13 remains closed.

As a result, as shown by the solid line arrow, the bathtub water in the bathtub 2 is led out from the suction port 4, and the hair catcher 6, the circulation pump 8, the three-way switching part a, the first electric valve Vll, the three-way switching part Filter tank 2 via inlet/outlet 22
0 from above. The hair catcher 6 removes hair and large debris contained in bath water from the bathtub 2 and prevents them from entering the circulation pump 8.

The bathtub water flowing in from the upper entrance/exit 22 passes through the granular filter medium 28 from top to bottom and reaches the lower entrance/exit 24, but the granular filter medium 2
Dirt, dirt, impurities, and other dirt contained in the bathtub water are removed by filtration while the bathtub water passes through step 8, and is purified.

The clean water is returned to the bathtub 2 from the clean water flow port 12 via the perforated partition plate 26, the lower entrance/exit 24, the three-way switching section C, and the fourth electric valve V14.

When the filtration mode command is released from the remote controller 14 or when the sequence controller 16 counts up a predetermined filtration time, the circulation pump 8 is stopped. As such filtration mode is repeated, dirt accumulates on the granular filter medium 28 (.

[Backwash mode]

When the backwash mode is designated by the remote controller 14, the sequence controller 16 controls the first electric valve Vll.
and while closing the fourth electric valve V14, the second electric valve V14 is closed.
The second electric valve V12 and the third electric valve V13 are opened, and the circulation pump 8 is driven.

As a result, as shown by the broken line arrow, the bathtub water in the bathtub 2 is led out as backwash water through the suction port 4, and the hair catcher 6, the circulation pump 8, the three-way switching section a1, the second electric valve V12, and the three-way switching section C and flows into the filtration tank 20 from below through the lower inlet/outlet 24.

The backwash water flowing in from the lower entrance/exit 24 flows through the perforated partition plate 2
6, passes through the granular filter medium 28 from bottom to top and reaches the upper entrance/exit 22, but while passing through the granular filter medium 28, the dirt attached to the granular filter medium 28 is successively separated from the granular filter medium 28. (.

Backwash water containing dirt is sent to the upper entrance/exit 22, three-way switching section b
, is discharged to the outside from the drain pipe 10 via the third electric valve V13. The granular filter medium 28 is restored by this backwashing.

When the backwash mode command is released from the remote controller 14 or when the sequence controller 16 counts up a predetermined backwash time, the circulation pump 8 is stopped.

<Problems to be Solved by the Invention> By the way, the above-mentioned conventional filtration device has the following disadvantages.

In order to switch the flow path between filtration mode and cleaning (backwash) mode, electric valves Vll to V14 and related piping systems are required, resulting in a larger and more complex filtration system and an initial The cost is high.

Further, in order to remove dirt such as dirt, dust, impurities, etc. from the granular filter media 28 and wash the granular filter media 28, the cleaning water is flowed in the opposite direction to the granular filter media 28, so that a certain cleaning effect can be achieved. This requires the use of a large amount of washing water, which increases running costs and takes time.

In addition, the filtration accuracy is determined by the particle size and storage capacity of the granular filter medium 2B, but in order to adjust the filtration accuracy according to the intended use and usage conditions, the particle size and storage capacity of the granular filter medium 28 must be selected appropriately. First, adjusting the filtration accuracy was troublesome.

The present invention was developed in view of these circumstances, and aims to downsize and simplify the filtration system, reduce the amount of water required for cleaning the filtration element, and improve filtration accuracy. The purpose is to make it easy to adjust.

<Means for Solving the Problems> In order to achieve the above object, the present invention has the following configuration.

The filter of the present invention includes a pair of perforated holding plates arranged to face each other in a filtration tank, and a thread-like or cloth-like filtration element stretched between the pair of opposing perforated holding plates. However, the present invention is characterized in that the holding plates with holes are configured to be able to approach and separate from each other freely.

<Effect> The effects of the above configuration of the present invention are as follows.

The filtration element is thread-like or cloth-like, and a pair of perforated holding plates covered with the thread-like or cloth-like filtration element are configured to be able to approach and separate from each other. The filter element can be massaged and washed.

In other words, by massaging the filter element, dirt such as dirt, dust, and impurities adhering to the filter element can be separated from the filter element.

Therefore, when cleaning the filtration element by massaging, there is no need to flow the cleaning water in the opposite direction to that during filtration, and the filtration element can be cleaned while the cleaning water remains in the filtration tank. becomes. The washing water stored in this filtration tank can be injected into the filtration tank in the same direction as during filtration, so there is no need to switch the flow path between filtration and washing.

Further, it is possible to adjust the interval between the pair of perforated holding plates, and by adjusting the interval, the density of the thread-like or cloth-like filtration element can be varied, thereby easily adjusting the filtration accuracy.

<Example> Below, an example of the present invention will be described in detail based on the drawings.

Here, an example will be described in which a filter is used in a bathtub filtration system. FIG. 2 shows a schematic configuration of the filtration system. In the figure, the same parts and portions as those shown in FIG. 3 of the conventional example are given the same reference numerals.

The suction side of the circulation pump 8 is connected to the suction port 4 provided in the bathtub 2 through a hair catcher 6, and the discharge side of the circulation pump 8 is connected to the upper inlet 42 of the filter A through an electric valve 1. The piping is connected to the The lower outlet 44 of the filter A is pipe-connected to the electric three-way switching valve V2, and one outlet of the electric three-way switching valve V2 is connected to the bathtub 2.
The other outlet is connected to a drain pipe 10.

The remote control unit 14 attached to the wall of the bathroom is configured to give commands for each mode to the sequence controller 16, and the sequence controller 16 controls the circulation pump 8, electric valve 1, and electric three-way switching valve v2. are controlled according to a predetermined order.

The details of the filter A are shown and explained in FIGS. 1(a) and 1(b). FIG. 1(a) shows the filtration mode state, and FIG. 1(b) shows the cleaning mode state.

The filter A has the above-mentioned upper inlet 42 at the upper part of the filtration tank 40, and the above-mentioned lower outlet 44 at the lower part. Inside the filtration tank 4o, a pair of perforated holding plates 46.48 are arranged to face each other in the vertical direction, which is the axial direction of the filtration tank 40.
A thread-like filter element 50 is densely stretched between the filter elements 48 and 48 . The pair of perforated holding plates 46, 48 and the filamentous filter element 50 are integrated into a filter unit a. The filtration element 50 is made of water-resistant synthetic fiber such as polyester or cotton thread, and has a durable structure in which a plurality of threads are twisted like kite thread.

A lower perforated holding plate 48 in the filtration unit la is mounted on a support plate 52 fixed to the lower part of the filtration tank 40 . An upper perforated holding plate 46 in the filtration unit a is removably attached to a piston rod 54a of a solenoid cylinder 54 that is attached to the filtration tank 40 so as to penetrate through its top plate. The cylinder 54 is connected to a motor 56 so as to reciprocate around its axis at a predetermined angle (approximately 10 degrees).

Note that 5B is an automatic air vent valve provided on the top plate of the filtration tank 40, and 60 is a water level sensor provided in the filtration tank 40.

Next, the operation will be explained.

[Filtration mode]

Figure 1(a) shows the piston rod 54a of the cylinder 54.
As shown in the figure, the upper and lower perforated holding plates 46 are
．． At 48, the thread-like filter element 50 is appropriately compressed. Just by adjusting the amount of protrusion of the piston rod 54a,
The amount of compression of the filtration element 50 and thus the filtration accuracy can be easily adjusted.

When the filtration mode is designated by the remote control operation unit 14, the sequence controller 16 opens the electric valve (1) and connects the electric three-way switching valve (2) so that the lower outlet 44 of the filtration tank 40 communicates with the clean water transport port 12 side. state, and the circulation pump 8 is driven.

As a result, as shown by the solid line arrow, the bathtub water in the bathtub 2 is drawn out from the suction port 4 and flows into the filtration tank 40 via the hair catcher 6, the circulation pump 8, the electric valve 1, and the upper inlet 42. It flows in from above.

The bathtub water flowing in from the upper inlet 42 passes through the upper perforated holding plate 46, passes through the thread-like filter element 50 compressed to a high density from top to bottom, and then passes through the lower perforated holding plate 48. The bath water passes through the filter element 50 to reach the lower outlet 44, and dirt such as dirt, dust, and impurities contained in the bath water is removed and purified while passing through the filter element 50. The clean water is supplied to the lower outlet 44 and the electric three-way switching valve V.
2, the clean water is returned to the bathtub 2 from the clean water flow port 12.

When the filtration mode command is canceled by the remote controller 14 or when the sequence controller 16 counts up a predetermined filtration time, the circulation pump 8 is stopped. While repeating such a cleaning mode, the filter element 5
Dirt accumulates on the 0.

[Washing mode]

When the cleaning mode is designated by the remote control operation unit 14, the sequence controller 16 activates the electric three-way switching valve v2.
and electric valve v1 are closed. Incidentally, since bathtub water remains in the filtration tank 40 at the end of the filtration mode, this bathtub water is used as washing water. However, if necessary, the bathtub water may be taken into the filtration tank until the water level sensor 60 outputs a detection signal.

The sequence controller 16 repeatedly drives the piston rod 54a of the cylinder 54 back and forth, and causes the motor 56 to repeatedly rotate the cylinder 54 back and forth. As a result, the vertical movement and reciprocating rotation of the upper perforated holding plate 46 are repeated to move the filtration element 50 into the filtration tank 4.
Rinse in 0 water. That is, Fig. 1<
By repeating the displacement from the state shown in a> to the state shown in FIG.
Applying expansion/contraction and twisting to 0, the filter element 50
Dirt such as dirt, dust, and impurities adhering to the filter element 50 is separated from the filter element 50.

After massaging the filtration element 50 for a predetermined period of time, the sequence controller 16 switches the electric three-way switching valve v2 to the drain pipe 10 side. Then, the separated wastewater containing dirt is discharged to the outside from the drain pipe 10. By this washing, the filter element 50
is restored.

Although the pressure inside the filtration tank 40 is reduced as the waste water is discharged, the automatic air vent valve 58 opens and air enters the filtration tank 40, so that vacuum breakdown of the filtration tank 40 is avoided.

In the above-mentioned cleaning, the filtration element 50 is massaged while the cleaning water remains in the filtration tank 40, so there is no need to flow the cleaning water in the opposite direction to that during filtration as in the conventional case, and the cleaning water is kept constant. The amount of water required to increase the cleaning effect can be significantly reduced compared to conventional methods. Furthermore, since there is no need to switch the flow path of the cleaning water, the number of valves can be reduced and the piping system can be simplified.

In the above embodiment, the upper perforated holding plate 46 is configured to not only move up and down but also rotate back and forth, but it may simply move up and down.

In addition, the process of massaging and draining may be repeated several times, or rinsing may be performed in which massaging is performed while replenishing washing water when waste water containing dirt is discharged. The plate 48 may be movable. The filter element 50 is not limited to a thread-like element, and may be a cloth-like element.

<Effect of the invention> According to the present invention, the following effects are achieved.

Since the thread-like or cloth-like filtration element can be washed by massaging while washing water remains in the filtration tank, there is no need to switch the direction of the flow path relative to the filtration tank between filtration and washing. The piping system including the pulp can be simplified, the filtration system can be made smaller and the structure can be simplified, and the initial cost can be reduced.

Since the filtration element can be cleaned while the cleaning water remains in the filtration tank, the amount of water required for cleaning can be significantly reduced compared to the conventional method in which the cleaning water continues to flow.
Running costs can be reduced.

Furthermore, the density of the thread-like or cloth-like filtration elements can be varied by adjusting the distance between the opposing perforated holding plates, and the filtration accuracy can be easily adjusted according to the purpose of use and conditions of use.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 relate to an embodiment of the present invention, and FIG.
a> is a cross-sectional view of the filter showing the filtration mode state, FIG.
b) is a sectional view of the filter showing the cleaning mode state, and FIG. 2 is a schematic configuration diagram of the filtration system. FIG. 3 is a schematic diagram of a conventional filtration system. A...Filter 46.48...Perforated holding plate 40...Filtration tank 50...Filtering element 54...Cylinder

Claims (1)

[Claims] (1) It has a pair of perforated holding plates arranged to face each other in a filtration tank, and a thread-like or cloth-like filtration element stretched between the pair of opposing perforated holding plates, and both of the above-mentioned A filter characterized in that a perforated holding plate is configured to be able to approach and move away from each other.