JPH08155223A - Bathtub filter consisting of antibacterial lime-based porous cured material - Google Patents

Abstract

(57) [Abstract] [Purpose] Light waste concrete waste can be easily exchanged for purification of bath water for a long period of time and excellent antibacterial and bactericidal properties can be maintained. [Structure] Referring to FIG. Bathtub filter 1
Is used by filling the cartridge material 2 with the filter material 3. The filter material 3 contains the antibacterial lime-based porous hardened material as a component, and the antibacterial lime-based porous hardened material contains a calcium component, Part of the calcium of the heavy metal partially substituted hydroxyapatite present on the outer surface and the surface layer of the inner surface of the pores is replaced with at least one heavy metal selected from the group consisting of silver, zinc, copper, nickel and tin. It is characterized by that. The substitution amount of the heavy metal in the heavy metal partially substituted hydroxyapatite is 1% to the saturated amount with respect to the hydroxyapatite. Porous hardened bodies containing calcium components utilize the waste of foamed lightweight concrete.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bathtub filter, and more specifically, it is obtained by using an antibacterial lime-based porous cured product formed from waste of foamed lightweight concrete as a filter material. The present invention relates to a bathtub filter that is capable of removing dust, dirt, and the like contained in hot water and has excellent antibacterial and sterilizing properties.

[0002]

2. Description of the Related Art In recent years, when taking a look at the bathing situation at home, the bathing time has become wide due to changes in the living environment. Therefore, a warming means is provided so that the user can take a bath at any time, and the bathing efficiency is improved. The bath water has been purified for repeated use and has been used repeatedly. Various types of such baths have been known in the past. For example, in Japanese Patent Application Laid-Open No. 4-35708, bath water in a bathtub is pumped through a suction pipe by a circulation pump and filtered by a filter. At the same time, there is described a bath water circulation purification device which is heated by a heater and returned to the inside of the bath through a discharge pipe. The filter for filtering the bath water in this bath water circulation purification device is a sheet filter using a filter paper as the filter member, a porous filter using a porous resin, a porous ceramic, or the like, and further, barley stone, sun stone, etc. The natural stone, so-called mineral stone, is used as a filter material in combination with a granular filter packed in a container. Further, JP-A-3-12290 describes that in the above-described bath water circulation purifying apparatus, sterilization treatment is performed to keep bath water cleanliness and to make bathing comfortable and prevent generation of bad odor. Ozone sterilization is shown as the sterilization treatment. In addition, a method of sterilizing by disposing an ultraviolet lamp in a bathtub or a circulation channel of the bathtub is also known. On the other hand, JP-A-3-90007 discloses the use of a heavy metal-substituted apatite-based antibacterial agent for sterilizing biomaterials, and JP-A-3-80270 discloses a similar antibacterial agent for industrial and agricultural use. It is disclosed to be used as a food and food additive, etc., respectively.

[0003]

However, in the various filter materials as described above, the sheet-like filter or the porous filter using the filter paper has the function of the filter because the bath water in the bath tub is repeatedly circulated. As a result, the purifying effect of the bath water was lost and the cleaning effect was lost in a short period of time. Therefore, not only the filter had to be frequently replaced, but also the bactericidal effect was poor. In addition, the filter member using barley stone adsorbs and filters ammonia (sweat) and protein (stain) from the human body, and at the same time has the action of sterilizing the hot water, which makes the hot water clear for a long time. Have the ability to hold. However, foreign matters will be deposited on the filter member as it is used for a long time.Therefore, it is necessary to make the filter member disposable and replace it with a new one within a certain period of time. It is not preferable because there is a problem that warm water becomes cloudy over several days to several weeks. There is also a method of cleaning the filter member to remove foreign matters, but this does not solve the problem of not only taking a great deal of time for cleaning but also causing cloudiness as when the filter member is replaced with a new one.

Further, in the sterilization treatment using ozone, ozone is blown directly into the bath water, or the inside of the hot water outlet to the bathtub of the circulation pipe for cleaning the bath water as described above It is done by blowing ozone into
According to this ozone sterilization method, unreacted ozone is released into the bathroom as it is, and there is concern that ozone may be harmful to the human body. In order to avoid this, it is necessary to take measures to exhaust ozone in the bathroom. However, this measure is not easy. On the other hand, it is known to use a heavy metal-substituted apatite antibacterial agent for the purpose of sterilization,
Not only is there no disclosure about the use for sterilization of bath water, but even if it is used, the antibacterial agent is in powder form and is not suitable for sterilization of bath water.

Therefore, as a result of various studies on the above problems, the inventors of the present invention have conducted an antibacterial effect using waste of foamed lightweight concrete as a filter material having both purification and sterilization, which are conditions of a bath water circulation purification apparatus, at the same time. It was found that a porous lime-based porous cured product can be used to satisfy the conditions for a bath filter, and the present invention has been made based on this finding. Therefore, the first problem to be solved by the present invention is to provide a bathtub filter that can be easily replaced and that can maintain bathwater purification and excellent antibacterial and sterilizing properties for a long period of time. It is in. The second problem that the present invention intends to solve
An object of the present invention is to provide a bathtub filter made of an antibacterial lime-based porous cured material that uses a waste of lightweight concrete.

[0006]

The above objects of the present invention can be achieved by the following inventions. (1) A bath filter, wherein the filter material is an antibacterial lime-based porous cured material. (2) The antibacterial lime-based porous cured body is a porous cured body containing a calcium component, and a part of the calcium of the heavy metal partially substituted hydroxyapatite existing on the outer surface and the surface layer portion of the inner surfaces of the pores Is substituted with at least one heavy metal selected from the group consisting of silver, zinc, copper, nickel, tin, and the bath filter according to the above item 1. (3) The replacement amount of the heavy metal of the heavy metal partially substituted hydroxyapatite is 1% to the saturated amount with respect to the hydroxyapatite, wherein the bath filter is described in the above item 2. (4) The bathtub filter according to any one of the above items 1 to 3, wherein the porous hardened body containing a calcium component is a waste of foamed lightweight concrete.

The present invention will be described in more detail below. The bath filter of the present invention is characterized in that the filter material is an antibacterial lime-based porous hardened material.
This not only purifies the bath water, but also has excellent antibacterial and bactericidal properties for a long period of time, and further has an excellent effect that the filter member can be easily replaced. In the bathtub filter of the present invention, the antibacterial lime-based porous hardened material is a porous hardened material containing calcium, and the calcium content present on the outer surface and the surface layer portion of the inner surface of the pores is water. A heavy metal partially substituted hydroxyapatite which is oxidized apatite, and a part of calcium forming the hydroxyapatite is replaced with at least one heavy metal selected from the group consisting of silver, zinc, copper, nickel and tin. In addition to the filter action by this, since the heavy metal has antibacterial properties, the bath water that has passed through the filter member cannot proliferate microorganisms due to the bactericidal effect of the heavy metal, and therefore has an odor, It has the excellent effect of being able to constantly supply hot water without sliminess. Furthermore, since the porous hardened body containing calcium, which is the raw material of the antibacterial lime-based porous hardened body, is a waste of foamed lightweight concrete,
It is also preferable from the viewpoint of environmental protection by utilizing waste.

The filter material used in the present invention is an antibacterial lime-based porous hardened material. More specifically, it is a porous hardened material containing a calcium component, and is applied to the outer surface and the surface layer portion of the inner surface of pores. Part of the calcium of the existing heavy metal partially substituted hydroxyapatite is replaced with at least one heavy metal selected from the group consisting of silver, zinc, copper, nickel and tin. The amount of substitution of these heavy metals is 1% to the amount of saturation with respect to the hydroxyapatite, and preferably 1% to 50%. When the substitution amount of heavy metal is less than 1%,
It does not exhibit sufficient antibacterial properties, and when the amount of substitution of heavy metals is saturated, sufficient antibacterial properties are exhibited. Here, the saturated amount of hydroxyapatite means that the calcium of hydroxyapatite is 1
Mean to be replaced with 00% heavy metal. The antibacterial lime-based porous hardened material used in the present invention is preferably a waste of foamed lightweight concrete, and this size may be an appropriate size, but preferably has a diameter of 3 mm to 30 mm.
Is good. Further, the porosity and pore diameter of the antibacterial lime-based porous cured body are not particularly limited, but it goes without saying that the surface area should be as large as possible.

The antibacterial lime-based porous hardened material used in the present invention can be produced by any method, but a preferred example is given. Silica stone, quicklime (CaO) and / or slaked lime (Ca (OH) ₂ ) and cement are mixed in an appropriate amount, the resulting mixture is added to water containing a foaming agent, and the mixture is poured into a mold for curing. A lime-based porous hardened body is obtained. In this curing, it is desirable to perform high temperature and high pressure curing after primary curing. The obtained porous cured product is taken out from the mold and used for a desired purpose. As the porous cured product used in the present invention, a defective product or a used product discharged during the above-mentioned production is adopted. . This is preferable because the manufacturing cost can be reduced.

[0010]

The present invention uses the antibacterial lime-based porous hardened material composed of heavy metal partially substituted hydroxyapatite as a filter material, so that the bath water passing through the filter tank is free from dust and proteins, and Since the heavy metals in the heavy metal partially substituted hydroxyapatite, which is the filter material, have antibacterial properties, microorganisms cannot propagate due to their bactericidal effect. As a result, it is possible to constantly supply bathtub hot water without odor or sliminess. Further, since one type has both the filtering function and the antibacterial function, the device can be simplified and the replacement can be easily performed.

[0011]

EXAMPLES The present invention will now be described in more detail with reference to examples, but it goes without saying that the present invention is not limited to these examples and is included in the present invention within the scope equivalent thereto. .

Example 1 Waste material of foamed lightweight concrete was crushed to a particle size of 3 mm to 3 mm.
The size was adjusted to 0 mm (average particle size 15 mm). The crushed lime-based porous hardened material was used at a normal temperature of 20% by weight.
It was immersed for 5 minutes in the ammonium phosphate aqueous solution. Then, this was aged at 60 ° C. for 1 week and further dried at 100 ° C. for 20 hours to obtain a surface layer neutralized lime-based cured product. This surface-neutralized lime-based cured product was immersed in a 0.05 mol / liter silver nitrate aqueous solution for 1 day, and further dried at 100 ° C. for 20 hours,
An antibacterial lime-based porous cured body containing 4.8% by weight of silver with respect to the cured body was obtained. FIG. 1 is a cross-sectional view showing the structure of the filter member of the present invention. As shown in FIG.
As the filter material 3, the antibacterial lime-based porous hardened body obtained above is used.
Was stored inside the filter 2 to form the filter part 1. Using this filter 2, the filterability of bath water,
Bactericidal and persistence were tested. Table 1 shows the results.

[0013]

[Table 1]

As is clear from Table 1, the antibacterial lime-based porous hardened material of the present invention has a small number of general bacteria, a turbidity of zero, and a sustainability of one year or longer.

Example 2 As Example 1 except that as the filter material 3 described in Example 1, an antibacterial lime-based porous cured body containing 2.9% by weight of copper with respect to the cured body was used. In the same manner, the filter part 1 was formed, and the filterability, sterilization property and sustainability of bath water were tested. The results are shown in Table 2.

[0016]

[Table 2]

As is clear from Table 2, the antibacterial lime-based porous hardened material of the present invention has a small number of general bacteria, a turbidity of zero, and a sustainability of one year or longer.

Example 3 As the filter material 3 described in Example 1, an antibacterial lime-based porous cured body containing 2.4% by weight of zinc and 1.5% by weight of silver with respect to the cured body was used. Example 1 except that
The filter part 1 was formed in the same manner as above, and the filterability, sterilization property and sustainability of bath water were tested. Table 3 shows the results.

[0019]

[Table 3]

As is clear from Table 3, the antibacterial lime-based porous hardened material of the present invention has a small number of general bacteria, a turbidity of zero, and a sustainability of one year or longer.

Example 4 As the filter material 3 described in Example 1, an antibacterial lime-based porous cured body containing 1.6% by weight of nickel and 2.3% by weight of silver with respect to the cured body was used. The filter part 1 was formed in the same manner as in Example 1 except that the bath water was filtered, and the filterability, sterilization and sustainability of the bath water were tested. The results are shown in Table 4.

[0022]

[Table 4]

As is clear from Table 4, the antibacterial lime-based porous hardened material of the present invention has a small number of general bacteria, a turbidity of zero, and a sustainability of one year or longer.

Example 5 As the filter material 3 described in Example 1, an antibacterial lime-based porous cured body containing 2.9% by weight of tin and 2.6% by weight of silver with respect to the cured body was used. The filter part 1 was formed in the same manner as in Example 1 except that the bath water was filtered.
Bactericidal and persistence were tested. The results are shown in Table 5.

[0025]

[Table 5]

As is clear from Table 5, the antibacterial lime-based porous hardened material of the present invention has a small number of general bacteria, a turbidity of zero, and a sustainability of one year or longer.

Example 6 FIG. 2 shows a circulating heat insulation purification apparatus for bath water using the bath water filter of the present invention. In FIG. 2, reference numeral 13 is a cover for covering the entire apparatus, and a filter part 1 and a circulation pump 6 for sending hot water to the filter part 1 in the cover 13.
It has. The filter part 1 has a cartridge 2, and the filter material 3 is contained in the cartridge 2.
Is filled. Of the antibacterial lime-based porous hardened material, the silver-substituted material described in Example 1 was used as the filter material 3. The bathtub 11 has a hot water inlet 12 and a hot water outlet 8. The hot water in the bathtub 11 flows in from the hot water inlet 12 by the circulation pump 6 and flows in from the lower part of the filter unit 1 via the pump 6. Then, it flows in from the hot water inlet 4 of the cartridge 2, passes through the layer of the filter material 3, and passes through the cartridge 2
It flows out from the hot water outlet 5.

At this time, the filter material adsorbs dirt such as hair, earth and sand or lint and dirt such as dust, and the silver substitute of the filter material 3 sterilizes and kills various bacteria, resulting in odor and sliminess. No hot water can be supplied. The hot water that has passed through this layer of filter material 3
Then, after flowing through the pipe 9 in the direction of the arrow 10 and being heated through the heater 7, hot water containing almost no suspended matter is discharged from the hot water outlet into the bath. Further, since the silver-substituted body of the filter material 3 is manufactured by using the waste of foamed lightweight concrete as a raw material, it is also excellent in environmental protection by recycling the waste. The filter material 3 can be used alone as described above, or can be used in combination with a conventional filter such as a wound filter.

[0029]

INDUSTRIAL APPLICABILITY According to the present invention, since the antibacterial lime-based porous hardened material is used as the filter material, it has both a filter action and a bactericidal action, the device can be simplified, and replacement is easy. It has the excellent effect of being Further, the filter material of the present invention has excellent antibacterial properties and can maintain its antibacterial action for a long period of time, so that it is extremely economical. Furthermore, since waste is used as a raw material,
It is also preferable from the viewpoint of environmental protection.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a structure of a filter member of the present invention.

FIG. 2 is a perspective view showing a 24-hour bath purifying apparatus using the filter member of the present invention.

[Explanation of symbols]

1 Filter Part 7 Heater 2 Cartridge 8 Hot Water Discharge Port 3 Filter Material 9 Pipe or Tube 4, 12 Hot Water Inlet 10 Hot Water Flow Direction (Arrow) 5 Hot Water Outlet 11 Bathtub 6 Circulation Pump 13 Cover

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location A47K 3/00 J B01D 39/14 G

Claims (4)

[Claims] 1. A filter for a bathtub, wherein the filter material is made of an antibacterial lime-based porous hardened material. 2. The antibacterial lime-based porous hardened body is a porous hardened body containing calcium, and is a heavy metal partially substituted hydroxyapatite calcium present on the outer surface and the surface layer portion of the inner surfaces of pores. Some are silver, zinc, copper, nickel,
The bath filter according to claim 1, which is substituted with at least one heavy metal selected from the group consisting of tin. 3. The bath filter according to claim 2, wherein the amount of substitution of the heavy metal in the partially substituted heavy metal hydroxyapatite is 1% to the amount of saturation with respect to the hydroxyapatite. 4. The filter for a bathtub according to claim 1, wherein the porous hardened body containing a calcium component is a waste of foamed lightweight concrete.