JPH11216306A - Purification device of bathtub water and circulating system of bathtub water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always maintain a microbial membrane of a suitable thickness on a surface of a filter material by a method wherein the filter material for physical removal is so arranged in a mode capable of scraping off the microbial membrane formed on the surface of the filter material for biological degradation in backwashing. SOLUTION: A vertical space is partitioned with a support 8 such as a stainless steel mesh or the like in a purification device 5, a filter material for biological degradation 10, in order to degradate a contaminated constituent dissolved in a bathtub water with a microbial membrane 11 formed on the surface is filled on the filter material 9. Then, a passage changeover valve is operated to reverse an inflow direction of the bathtub water into the purification device 5, the filter material 9 is wound up from down, and the microbial membrane 11 on the surface of the filter material 10 is thinned by scratching off by collision with the filter material and improval of fluidity of the filter material 10 itself owing to that collision. Further, a contaminant stuck to the filter material 9 is also simultaneously peeled off from the filter material 9 and exhausted outside via a drain pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a purifier for purifying bath water and a bath water circulation system incorporating the purifier.

[0002]

2. Description of the Related Art A conventional purifying apparatus and a circulation system incorporating the same will be described with reference to FIG.
A circulation path 101 for bathtub water, a purification device 102 filled with a filtering material for physical removal,
It is configured to include a purification device 103 filled with a filter material for biodegradation, a heat retaining unit 104 such as a heater, and a sterilizing unit 105.

[0003] By sending the bathtub water to the purifying device 102 by the pump P, the dust and the like in the bathtub water are physically removed by the filter material 106, and the bathtub water from which the dust and the like have been removed is sent to the purifying device 103. Thus, the dirt component in the bath water is decomposed by the microbial membrane formed on the surface of the filter medium 107.

As shown in FIG. 11, a cartridge 109 is filled with a large-diameter filter material 107 having a microbial membrane formed on the surface thereof.
There is also a device which is loaded in the purifier main body 110 so as to be able to be taken out.

[0005]

In the above-mentioned conventional purifying apparatus, the diameter of the filter medium 107 is as large as 5 to 15 mm because a microbial membrane is formed on the surface. However, when the diameter becomes large, on the contrary, the fluidity and the stirring property are low,
Poor filter media washability. As a result, the microbial membrane formed on the surface of the filter medium 107 is thickened, and suddenly peels off from the surface of the filter medium 107 during operation other than the time of backwashing to form a slime and is returned to the bathtub.

[0006] The slime-like microbial membrane has a bad feel, causes clogging and lowers the commercial value of the purification device, and also promotes the propagation of various bacteria such as Legionella spp.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a bathtub water purifying apparatus according to the present invention comprises a filter material for biodegradation having a microbial membrane on its surface for decomposing dirt components in bathtub water, and a bathtub. A filter for physical removal that physically removes dirt and the like in water, wherein the filter for physical removal scrapes off a microbial membrane formed on the surface of the filter for biodegradation during backwashing. Are arranged in a possible manner.

[0008] As an embodiment capable of scraping the above-mentioned microbial membrane, for example, a filter material for physical removal and a filter material for biodegradation are filled in the same purification column, and the filter material for physical removal is filled. A filter having a smaller diameter and a higher specific gravity than a filter material for biodegradation is selected.

[0009] As another mode in which the above-mentioned microbial membrane can be scraped off, for example, a filter material for biodegradation is a honeycomb structure, and a filter material for physical removal flows through the pores of the honeycomb structure. Particle size sufficient for

The filter material for physical removal has a particle size of 0.1.
The thickness is preferably 4 to 1 mm for exhibiting a scraping effect, and the particle size of the biodegradation filter is preferably 3 mm or more for forming a microbial membrane such as a filamentous fungus.

The filter material for physical removal and the filter material for biodegradation are partially overlapped, that is, a part of the filter material for biodegradation is buried in the filter material for physical removal. Can be arranged as follows.

Specific examples of the filter material for physical removal include inorganic beads such as glass beads and alumina beads, and specific examples of the filter material for biodegradation include activated carbon.

Further, it is possible to carry an antibacterial agent such as Ag on a filter for physical removal or biodegradation. With such a configuration, it is possible to effectively remove germs.

[0014] The filter material for biodegradation can be constituted by blending an inorganic binder with activated carbon. Specifically, it is preferable that the filter material for biodegradation is constituted by mixing 30 to 70 wt% of an inorganic binder with activated carbon. The mixing ratio of the inorganic binder to the activated carbon of the filter material for biodegradation is such that the bulk specific gravity of the filter material for physical purification and the filter material for biodegradation is 1.5: 0.5 to 1.
The ratio is preferably 5: 0.7, and it is preferable to fill the filter so that the volume ratio of the filter material for physical purification and the filter material for biodegradation is 5:70 to 2: 7. .

Further, the bathtub water circulation system according to the present invention is constituted by disposing the purifying device in the middle of a circulation path for taking out the bathtub water and returning it to the bathtub. It is also possible to arrange a sterilizing means such as an ozone generator and an electrolytic sterilizing device.

[0016]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a general view of a bathtub water circulation system incorporating a purifying device according to the present invention. A bath adapter 2 is provided in a bathtub 1, and the bus adapter 2 has a suction pipe provided with a circulation pump P. One ends of the return pipe 3a and the return pipe 3b are connected, and the other ends of the suction pipe 3a and the return pipe 3b are connected to the flow path switching valve 4.

One end of each of the pipes 3c and 3d is connected to the flow path switching valve 4, and the other end of each of the pipes 3c and 3d is connected to the purifying device 5 according to the present invention. The suction pipe 3a, the return pipe 3b, and the pipe 3c , 3d, the flow path switching valve 4, and the purifying device 5, the circulation path 3 is formed. In the middle of the pipe 3d, a heater 6 is provided.
And a drain pipe 7 extends from the flow path switching valve 4.

FIG. 2 is a cross-sectional view of the purifying device 5. The inside of the purifying device 5 is divided into upper and lower spaces by a support 8 such as a stainless steel mesh. The filter material 9 is filled with a biodegradation filter material 10 for decomposing dirt components dissolved in bath water with a microbial membrane formed on the surface. These filtering materials 9 and 10 can carry a heavy metal such as silver or copper or an organic antibacterial agent, whereby the safety of bath water is improved.

The filtering material 9 has a diameter of, for example, 0.4 to 1 mm.
And the filtering material 10 is, for example, 7 m in diameter.
A columnar activated carbon having a length of 10 m and a length of 10 mm is used. And
When these filtration materials 9 and 10 are filled into the purification device 5 by 250 CC each, the filtration material 9 has a higher specific gravity than the filtration material 10, so that the filtration material 9 becomes lower and the filtration material 10 becomes upper,
Furthermore, the upper part of the filter medium 9 and the lower part of the filter medium 10 overlap.

FIG. 3A is a photomicrograph (150 ×) of the surface of a glass bead serving as a filter medium 9, and FIG.
Is a micrograph (× 1000) of the surface of activated carbon as glass beads. Since the surface of glass beads is smooth and has a high fluidity, no microbial membrane is formed on the surface. Can be confirmed that a microbial membrane is formed.

Next, the operation of the purifying device will be described with reference to FIGS. First, when the normal filtration operation is continued, as shown in FIGS. 5A and 5B, the microbial membrane 11 formed by the bacteria immobilized on the surface of the filter medium 10 causes the dirt component in the bathtub water to be removed. While thickening while trapping / decomposing, and pollutants are physically filtered by the filter medium 9.

Therefore, as shown in FIG.
To reverse the inflow direction of the bathtub water into the purification device 5. Then, as shown in FIGS. 6 (a) and 6 (b), the filter medium 9 is wound up from below, and the microbial membrane on the surface of the filter medium 10 due to the collision with the filter medium 9 and the improvement of the fluidity of the filter medium 10 itself due to the collision. Numeral 11 is appropriately scraped off and thinned, and pollutants adhering to the filter medium 9 are simultaneously peeled off from the filter medium 9 and discharged to the outside via the drain pipe 7.

By the above operation, FIGS. 7A and 7B
As shown in (1), a microbial membrane 11 having an appropriate thickness for biodegradation is left on the surface of the filter medium 10, and the state of the sanitary filter medium is always maintained.

FIGS. 8A to 8D are cross-sectional views showing another embodiment of the purifying apparatus. In the embodiment shown in FIG. And upper support 1
2, the lower support 8 is filled with the filter material 9 for physical removal as described above, while the upper support 12 is filled with the filter material 10 for biodegradation. The coarseness of the support 12 is larger than that of the lower support 8 so that the filter medium 9 permeates the support 12 and reaches the filter medium 10 during backwashing.

In the embodiment shown in FIG. 8 (b), a cylindrical body 13 made of a coarse material is hung down from the ceiling of the purification device 5, and the filter medium 10 is filled in the cylindrical body 13. I have to. Even with such a configuration, the microbial membrane on the surface of the filter medium 10 can be scraped off by the filter medium 9 during backwashing.

In the embodiment shown in FIG. 8C, the thickness of the filter medium 9 is made larger than that of the embodiment shown in FIG. 8B, and the filter medium 10 is buried in the filter medium 9 layer. I have to. Even with such a configuration, the microbial membrane on the surface of the filter medium 10 can be scraped off at the time of backwashing, as described above.

In the embodiment shown in FIG. 8D, instead of using the particulate filter material 10, a filter material 10 in which the active material is formed into a honeycomb shape is used. When the particulate filter medium 10 is used, a design considering the volume expansion of the filter medium 10 at the time of backwashing has to be performed. In this way, by forming the filter medium 10 into a honeycomb shape, The space inside the purification device 5 can be used effectively without the filter medium 10 expanding.

FIG. 9 is an overall view of a bathtub water circulation system according to another embodiment. In this embodiment, a return pipe 3b is provided.
Is provided with a sterilizing means 14 to enhance the safety of bathtub water.
Examples of the sterilizing means include an ultraviolet lamp, an ozone generator, and an electrolytic sterilizing device.

[0029]

As described above, according to the purification apparatus of the present invention, the filter material for biodegradation can be removed by the filter material for physical removal that physically removes dirt components in bath water during backwashing. Since the microbial membrane formed with a thickness more than necessary on the surface is scraped off, a microbial membrane having an appropriate thickness can always be maintained on the surface of the filter medium.

The following (Table 1) compares the numbers of Legionella genus living on the surface of the conventional filter medium and the filter medium of the present invention. From this (Table 1), it can be seen that a filter medium in which a microbial membrane having an appropriate thickness is always formed does not easily become a breeding ground for propagation of Legionella spp.

[0031]

[Table 1]

The following (Table 2) compares the numbers of Legionella bacteria that lodge on the surfaces of the conventional filter material and further specific filter materials of the present invention. In addition, a purifying apparatus having a structure shown in FIG. 2 was used, a filter medium for physical removal was glass beads having a bulk specific gravity of 1.5 g / cc and a diameter of 0.8 mm, and a filter medium for biodegradation had a bulk specific gravity of 0.1 mm. 5 g / cc, 4 mm in diameter, 3 mm in length, and 50% of an inorganic binder were blended into a columnar activated carbon. The same purifying column was filled. And
During normal filtration operation, as shown in FIG. 5, due to the difference in specific gravity, the glass beads (filter material for physical removal) move downward, the columnar activated carbon (filter material for biodegradation) moves upward, and further the glass beads (filter material for physical removal). The upper part of the filter material for filtration) and the lower part of the columnar activated carbon (the filter material for biodegradation) are formed in an overlapping form to filter and purify. In addition, as shown in FIG.
The glass beads (filter material for physical removal) and the columnar activated carbon (filter material for biodegradation) are simultaneously stirred and adhere to the glass beads (filter material for physical removal) by exhibiting uniform fluidity. The excess contaminants are exfoliated, and the excess microbial membrane formed on the surface of the columnar activated carbon (filter material for biodegradation) is appropriately scraped off. After the backwash is completed,
As shown in the figure, the state returned to the normal filtration operation due to the difference in specific gravity.

[0033]

[Table 2]

In addition, as a result of the formation of a microbial membrane of an appropriate thickness on the surface of the filter medium, the soil components are effectively decomposed, and the microbial membrane is peeled off and returned to the bath as a slime. No more.

Further, according to the circulation system of the present invention,
The backwashing operation can be performed by switching the flow path by operating the valve, so that the microbial membrane of an appropriate thickness is maintained on the surface of the filter medium only by automatically setting the backwash mode at predetermined time intervals. be able to.

[Brief description of the drawings]

FIG. 1 is an overall view of a bathtub water circulation system incorporating a purification device according to the present invention.

FIG. 2 is a sectional view of a purification device according to the present invention.

FIG. 3 (a) is a micrograph of a glass bead surface,
(B) Micrograph of activated carbon surface

FIG. 4 is an overall view of a circulation system similar to FIG. 1, showing the flow of bathtub water during backwashing.

5 (a) is a cross-sectional view of a purification device in which a microbial membrane is formed thick on the activated carbon surface, and (b) is an enlarged view of the activated carbon shown in (a).

6 (a) is a cross-sectional view of a state where the purification device is being backwashed, and FIG. 6 (b) is an enlarged view of the activated carbon shown in FIG. 6 (a).

FIG. 7A is a cross-sectional view of the state after the cleaning device has been backwashed, and FIG. 7B is an enlarged view of the activated carbon shown in FIG.

FIGS. 8A to 8D are cross-sectional views showing another embodiment of the purification device.

FIG. 9 is an overall view of a bathtub water circulation system according to another embodiment.

FIG. 10 is an overall view of a circulation system incorporating a conventional purification device.

FIG. 11 is a sectional view showing another example of the conventional purification device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... bathtub, 2 ... bus adapter, 3 ... circulation path, 3a ... suction pipe, 3b ... return pipe, 3c, 3d ... piping, 4 ... flow path switching valve, 5 ... purification device, 6 ... heater, 7 ... drainage Tubes, 8,12
... Support, 9 ... Filter for physical removal, 10 ... Filter for biodegradation, 11 ... Microbial membrane, 14 ... Sterilization means.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI B01D 39/14 C02F 1/28 D C02F 1/28 1/50 510A 1/50 510 520L 520 531D 531 540F 540 550B 550 550H 560B 560 560H 560Z 3/06 ZAB 3/06 ZAB 3/10 A 3/10 B01D 29/08 530D 540A 35/02 J (72) Inventor Takashi Kinoshita 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu City, Fukuoka Prefecture Inside Equipment Co., Ltd. (72) Inventor Hidetoshi Motoyama 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-city, Fukuoka Prefecture Inside Totoki Equipment Co., Ltd. (72) Inventor Hiroshi Kanamaru 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-city, Fukuoka Prefecture No. 1 Toto Kiki Co., Ltd.

Claims (13)

[Claims] 1. A bath tub comprising a biodegradation filter having a microbial membrane formed on a surface thereof for decomposing a dirt component in bath tub water, and a physical removal filter for physically removing dust and the like in the bath tub water. In the water purification device, the filter material for physical removal is arranged in a manner capable of scraping a microbial membrane formed on a surface of the filter material for biodegradation during backwashing. Bathtub water purification equipment. 2. The bathtub water purifying apparatus according to claim 1, wherein the filter material for physical removal has a smaller diameter and a larger specific gravity than a filter material for biodegradation. Purification device. 3. The bathtub water purifying apparatus according to claim 1, wherein the filter material for biodegradation is a honeycomb structure, and the filter material for physical removal flows in the holes of the honeycomb structure. A bath tub water purifier characterized by having a particle size sufficient for water. 4. The bath tub water purifying apparatus according to claim 2, wherein the particle size of the filter medium for physical removal is 0.4 to 1 m.
m, a bath tub water purification apparatus, wherein the particle size of the biodegradation filter material is 3 mm or more. 5. The bathtub water purifier according to claim 2, wherein the filter material for physical removal and the filter material for biodegradation are arranged so that a part thereof overlaps. Bathtub water purifier characterized. 6. The bathtub water purifying apparatus according to claim 2, wherein the filter material for physical removal is inorganic beads such as glass beads and alumina beads, and the filter material for biodegradation is A bathtub water purifier characterized by being activated carbon. 7. The bathtub water purifying apparatus according to claim 2, wherein an antimicrobial agent is carried on the filter material for physical removal or biodegradation. Purification device. 8. The bathtub water purifying apparatus according to claim 2, wherein the filter material for biodegradation contains activated carbon and an inorganic binder. 9. The bathtub water purifying apparatus according to claim 8, wherein the filter material for biodegradation contains 30 to 70 wt% of an inorganic binder in activated carbon. 10. The bathtub water purifying apparatus according to claim 8, wherein the mixing ratio of the inorganic binder to the activated carbon of the biodegradation filter material is determined by the ratio of the physical purification filter material to the biodegradation filter material. The bulk specific gravity is 1.5: 0.5 to 1.5:
A bathtub water purifier characterized by a ratio of 0.7. 11. The bathtub water purifying apparatus according to claim 8, wherein a volume ratio of the filtering material for physical purification and the filtering material for biodegradation is 5:70 to 2: 7. Bath water purifier characterized by being filled as follows. 12. A bathtub water circulation system, wherein the purifying device according to claim 1 is arranged in a circulation path for taking out bathtub water and returning it to the bathtub again. 13. The bathtub water circulation system according to claim 12, wherein sterilization means is provided in said circulation path.