JPH09173724A - Circulating filter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to improve the filtration efficiency. SOLUTION: Three layers of filter media 22, 24 and 26 are eliminatedly arranged in a filter tank 16. Stagnating members 30 having a specified thickness are arranged between the filter media 22 and 24, by which a stagnating region 32 is formed in this part. When a pump 38 is run, the water or hot water flowing into the filter tank 16 from its inlet 18 passes the filter media 26 and 24 and flows out to the stagnating region 32. The water or hot water is decelerated at its flow velocity and is put into a stagnating state in the stagnating region 32 where flow passages are widely formed. The water or hot water is prolonged in the contact time with the upper part of the filter media 22 and the lower part of the filter media 24, by which the more foreign matter is removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circulation filtration device,
In particular, for example, the present invention relates to a circulation filtration device used in a hot bath for circulating and filtering water in a bathtub or hot water.

[0002]

2. Description of the Related Art A conventional circulation filtration device 1 of this type shown in FIG. 7 includes a circulation path 3 in which water or hot water is circulated by a pump 2. The circulation path 3 is provided with a filter tank 4 for filtering water or hot water. An inlet 5 to which the circulation passage 3 is connected is formed at one end of the filtration tank 4, and an outlet 6 to which the circulation passage 3 is connected is formed at the other end. An inlet 5 is provided inside the filtration tank 4.
A plurality of filter media 7a, 7b, and 7c are arranged in layers in order from the side. A cage 8a is provided on the outlet 6 side of the filter 7c in the filter tank 4, and a cage 8b is similarly provided between the filter 7b and 7c.

A pump 2 is provided at the end of the circulation path 3 connected to the outlet 6 of the filtration tank 4. When pump 2 is activated,
Water or hot water flows from the circulation path 3 into the filtration tank 4 through the inlet 5. This water or hot water passes through the filter materials 7a and 7b and reaches the portion of the cage 8b. In this portion, the flow passage area in the filtration tank 4 is enlarged, and the flow velocity of water or hot water is reduced. This is because the filtering function of the filtering materials 7b and 7c is exerted. The decelerated water or hot water passes through the filter material 7c and the cage 8a, and exits from the filtration tank 4 to the circulation path 3
Spilled to.

[0004]

However, if the thickness of the cage 8b disposed between the filter media 7b and 7c in the filter tank 4 is about the same as the thickness of the cage 8b, the water in the cage 8b is not removed during operation of the circulation filtration device 1. Or the flow velocity of the hot water cannot be sufficiently reduced. Therefore, the contact time between the water or hot water that has flowed out to the portion of the cage 8b and the lower portion of the filter material 7b and the upper portion of the filter material 7c becomes shorter. And, foreign matter in water or hot water is not sufficiently adsorbed in this portion. That is, there is a problem that the filtration efficiency of the circulation filtration device 1 is poor.

Therefore, a main object of the present invention is to provide a circulation filtration device capable of improving filtration efficiency.

[0006]

SUMMARY OF THE INVENTION The present invention comprises a circulation passage for circulating water or hot water by a pump and a filtration tank provided in the circulation passage for filtering water or hot water, and an inlet provided in the filtration tank. In a circulation filtration device including a plurality of layered filter media provided in a filter tank for filtering water or hot water flowing in from an inlet, and an outlet for discharging water or hot water passing through the filter media, The circulation filtration device is characterized in that a retention region for retaining water or hot water is formed between two filter media.

[0007]

When the pump of the circulation filtration device is operated, water or hot water flows from the inlet of the filtration tank into the filtration tank through the circulation path, and passes through the plurality of filter materials stacked in the filtration tank. . This water or hot water is retained and settled in the retention area formed between at least two filter media. Then, the contact time between the filter material and water or hot water becomes long in the retention area. Therefore, the foreign matter in the water or hot water is sufficiently adsorbed by the filter medium.

[0008]

According to the present invention, foreign matter in water or hot water is sufficiently adsorbed by the filter material in the retention area, so that the filtration efficiency of the circulation filter device can be improved. The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0009]

EXAMPLE A circulation filtration device 10 of this example shown in FIG.
Is used in a warm bath system that circulates water or hot water in the bathtub 12, and includes a circulation path 14 and a filtration tank 16. The filtration tank 16 is formed in a hollow columnar shape and is arranged with its axial direction corresponding to the vertical direction. An inlet 18 is formed at a predetermined position on the outer periphery of the filtration tank 16. The lower part of the filtration tank 16 is formed to have a tapered diameter, and the outlet 2 is provided at the substantially center thereof.
0 is formed. The tubular circulation path 14 is connected to each of the inlet 18 and the outlet 20 formed in the filtration tank 16.

In the filter tank 16, a plurality of filter media 22, 24 and 26 are laminated in this order from the bottom (in this embodiment, 3
Layers). The filtering materials 22, 24 and 26 are formed by wrapping a member having a function of adsorbing water in the bathtub 12 or foreign matter generated in the hot water with a net.
In this embodiment, granular ceramics having a large porosity and a high adsorption rate for foreign matter are wrapped inside the nets of the filter media 22 and 24. On the other hand, inside the net of the filter medium 26, spherical ceramic balls having a slightly smaller porosity than the filter mediums 22 and 24 are wrapped.

Between the lowermost portion of the filter tank 16 where the outlet 20 is formed and the filter medium 22, a cage 28 as shown in FIGS. 2 and 3 is arranged. The cage 28 includes a circular plate 28 a along the inner circumference of the filtration tank 16. A ring-shaped member 28b is provided on the outer periphery of the plate 28a to regulate the thickness of the cage 28.
Is attached. Further, the plate 28a is arranged substantially at the center of the thickness of the cage 28. A plurality of grid holes 28c are formed in a grid pattern on the main surface of the plate 28a at predetermined intervals. Board 28
At a predetermined position between the plurality of lattice holes 28c in a, the plate 2
A plurality of protrusions 28d are provided so as to be perpendicular to the main surface of 8a. The protrusions 28d are formed so as to protrude from both surfaces of the plate 28a to the thickness of the cage 28. By arranging the cage 28, the filter medium 22 arranged on the upper part thereof is prevented from being sucked into the outlet 20 formed on the lower part of the filter tank 16 (FIG. 1).

A retaining member 30 as shown in FIGS. 4 and 5 is disposed between the filter media 22 and 24 disposed above the cage 28 in the filter tank 16. The retention member 30 has a circular plate 28 in the cage 28 shown in FIGS. 2 and 3.
The tips of the plurality of protrusions 28d extending from the upper surface of a are formed by extending a certain length. That is, the retention member 30 includes a circular plate 30a, and a plurality of lattice holes 30b are formed on the main surface of the plate 30a. A ring-shaped member 30c is attached to the outer periphery of the plate 30a. Then, a protrusion 30d is formed so as to protrude a predetermined height from the upper end surface of the member 30c from a predetermined position between the plurality of lattice holes 30b. Protrusion 30d
Are formed differently depending on the position of the circular plate 30a. In this embodiment, the plate 30a shown in FIG.
Member 30c of protrusion 30d formed on a portion and b portion of the
The protrusion height A (Fig. 5) from the upper end surface of the plate is c of the plate 30a.
The protrusion height B of the protrusion 30b formed on the portion d, the portion d, and the portion o is set to about twice. The protruding end of the protrusion 30d supports the lower surface of the filter medium 24 in the filter tank 16. The retention member 30 forms a retention region 32, which is a space having a required thickness, between the upper surface of the filter medium 22 and the lower surface of the filter medium 24.

The end of the circulation path 14 connected to the inlet 18 side of the filtration tank 16 has a suction unit 34 provided in the bathtub 12.
Linked to On the other hand, the end of the circulation path 14 connected to the outlet 20 side of the filtration tank 16 is connected to a blowout unit 36 provided in the bathtub 12 via a pump 38. Then, a warm bath system using the circulation filtration device 10 is formed.

The outer diameter of the filtration tank 16 is 200 mm.
mm, height is about 400 mm. Regarding the dimensions of the cage 28 and the retaining member 30, the outer diameter of the circular plates 28a and 30a is 120 mm, the thickness of the ring-shaped members 28b and 30b is 15 mm, and the length of one side of the lattice holes 28c and 30c is 10 mm. The outer diameters of the protrusions 28d and 30d are set to about φ5 mm. The protrusion height A of the protrusion 30d of the retention member 30 is 15 to 20 mm and B is 10 to 15 mm.
It is set to a degree. Therefore, the length of the retention area 32 is set to about 30 to 35 mm by adding the protrusion height A to the conventional ring-shaped members 28b and 30b having a thickness of 15 mm.

In this warm bath system, when the pump 38 of the circulation filtration device 10 is operated, the water or hot water in the bath 12 is sucked from the suction unit 34 provided in the bath 12. The sucked water or hot water flows into the filter tank 16 through the circulation passage 14 from the inlet 18 of the filter tank 16. Then, this water or hot water flows out to the retention region 32 in which the retention member 30 is disposed through the filtration media 26 and 24 disposed in the filtration tank 16. The flow path in the retention area 32 is
It is formed wider than the flow path in which the filter materials 26 and 24 are arranged. Therefore, the flow velocity of water or hot water flowing out to the retention area 32 is reduced. Further, this water or hot water is retained and settled in the retention region 32 in which the flow path is formed to be long by the protrusion height A of the protrusion 30d of the retention member 30. Then, the water or hot water that has been accumulated and settled and the filtering material 24
The contact time between the lower part of the filter and the upper part of the filter medium 22 becomes longer. That is, more foreign matter contained in water or hot water is adsorbed on the filtering media 22 and 24. The water or hot water that has passed through the retention region 32 in this manner passes through the filter medium 22 and the cage 28 arranged below the retention member 30. Then, it flows out to the circulation path 14 from the outlet 20 formed in the lower part of the filtration tank 16. The water or hot water flowing out to the circulation path 14 is blown out into the bathtub 12 from the blowout unit 36 provided in the bathtub 12 through the pump 38.

According to this embodiment, the flow velocity of the water or hot water flowing into the retention area 32 in the filtration tank 16 is reduced, and the water or hot water is retained and becomes stagnant. And the filter medium 24
The contact time between the lower part of the filter and the upper part of the filter medium 22 becomes longer. That is, more water or foreign matter in the hot water is adsorbed by the filter media 24 and 22 as compared with the conventional case. Therefore, the filtration efficiency of the circulation filtration device 10 can be improved.

The graph shown in FIG. 6 shows the relationship between the operating time of the circulation filtering device 10 and the turbidity (foreign matter removal rate) in the bath 12. The solid line circles in this graph show the case of the embodiment in which the retention region 32 is formed in the filtration tank 16. On the other hand, what is indicated by a broken-line triangle indicates the case of the conventional technique in which the retention area 32 is not formed in the filtration tank 16.

Referring to the foreign matter removal rate shown on the vertical axis of this graph, in the conventional circulation filtration device in which the retention area 32 is not formed in the filtration tank 16, for example, about 97% of the foreign matter in water or hot water is removed. It requires about 760 hours of operation time. On the other hand, in the case of the present invention in which the retention area 32 is formed in the filtration tank 16, about 97% of foreign matter in water or hot water is contained.
It can be seen that only about 480 hours of operation time is required to remove the. From this result, it is understood that the circulation filtration device 10 requires only about 2/3 of the operation time as compared with the conventional case to remove the foreign matter in the water or the hot water up to a certain reference value. That is, the filtration efficiency of the circulation filtration device 10 can be improved.

Further, the retaining member 30 shown in the above embodiment
The size of the lattice hole 30b and the position of the protrusion 30d and the protrusion heights A and B formed in the above can be arbitrarily set within an allowable dimension. Therefore, in FIG. 4 and FIG. 5, for example, the protrusions 30d may be raised only at four places of the part a, or the protrusions 30d at nine places of the parts c, d and o may be raised.

[Brief description of the drawings]

FIG. 1 is an illustrative view showing one embodiment of the present invention;

FIG. 2 is an illustrative view showing a cage.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is an illustrative view showing a retaining member.

FIG. 5 is a sectional view taken along line VV in FIG. 4;

[Fig. 6] Operating time and turbidity of the circulation filter (foreign matter removal rate)
6 is a graph showing a relationship with the graph.

FIG. 7 is an illustrative view showing a conventional technique;

[Explanation of symbols]

 10 ... Circulation filtration device 12 ... Bathtub 14 ... Circulation path 16 ... Filtration tank 18 ... Inlet 20 ... Outlet 22, 24, 26 ... Filtration material 28. Protruding height

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomoaki Inouchi 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Vinyl Pipe Factory Co., Ltd. In Talang Co., Ltd. (72) Inventor Atsushi Osawa 1-247 Shikitsu Higashi Naniwa-ku Osaka City Kubo Talang Co., Ltd.

Claims (1)

[Claims] 1. A circulation path for circulating water or hot water by a pump, and a filtration tank provided in the circulation path for filtering water or hot water. An inlet provided in the filtration tank and a filtration tank provided in the filtration tank. A plurality of filter media arranged in a stack for filtering water or hot water that has flowed in through the inlet, and an outlet for discharging water or hot water that has passed through the filter media, wherein at least two of the filtration devices are provided. Characterized by forming a retention area for retaining water or hot water between the materials,
Circulation filtration device.