JPH0871340A - Bathtub filter using metal fiber - Google Patents

Abstract

PURPOSE: To provide a miniaturized filter excellent in processibility, and capable of easily exchanging, and keeping a bathtub water cleaning function and excellent anti-bacteria properties and sterilizing functions for a long duration. CONSTITUTION: A material for this bathtub filter consists of at least one of the metals selected from among copper, zinc, tin, and lead, and formed into at least one state selected from among fiber, wire, thread, string, mesh, cloth, unwoven fabric, sponge having continuous foams, and plate state having numberless holes and also plated with copper, zinc, tin, or lead. The structure of the filter is a bellows or cylindrical type. Figure shows the slantingly observed figure of the structure of the filtering member that a cylinder 45 having an inner tube 44 is packed with copper fibers 46 to give a filter with a cylindrical structure 43a.

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, to remove dust, dirt, etc. in hot water obtained by constructing a filter member using copper or the like as a filter material. The present invention relates to a bathtub filter which is capable of performing 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. Further, in the conventional bath water circulation purification device, the filtration part and the sterilization part exist independently. First, the bath water enters the filtration part at the filtration part to remove relatively large suspended matter, and then the sterilization part at the sterilization part. It flows in and is sterilized.

[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. Furthermore, in the conventional bath water circulation purification device, since the filtration part and the sterilization part exist independently, the device itself inevitably becomes large, and there is a problem that it is difficult to use especially in a bathroom such as a unit bath. It was Therefore, as a result of various studies on the above-mentioned problems, the inventors of the present invention have satisfactorily set the conditions for the bath filter by using copper or the like for the filter material that has both purification and sterilization, which are the conditions for the bath water circulation purification device. The present invention has been made based on this finding, which was found to satisfy. Therefore, the problem to be solved by the present invention is
It is an object of the present invention to provide a bathtub filter which has good workability, is small in size, can be easily replaced, and is capable of purifying bath water and maintaining excellent antibacterial and sterilizing properties for a long period of time.

[0005]

The above objects of the present invention can be achieved by the following inventions. (1) A bath filter, wherein the filter material is at least one selected from copper, zinc, tin, or lead. (2) For a bathtub according to the above item 1, wherein the filter material is a filter member made of at least one selected from fibrous, linear, thread-like, string-like, net-like, non-woven fabric filter. (3) The filter for bath according to item 1, wherein the filter material is a filter member made of at least one member selected from a sponge-like material having open cells or a plate-like material having innumerable pores. (4) The bathtub according to any one of the above items 1 to 3, wherein the filter material is at least one selected from copper-plated fiber, zinc-plated fiber, tin-plated fiber and lead-plated fiber. Filter for. (5) The bathtub filter according to any one of items 1 to 4, wherein the structure of the filter is a bellows type or a tubular type.

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 made of metal such as copper or copper-plated fiber. As a result, not only the bath water is purified, but also hot water having excellent antibacterial and bactericidal properties for a long period of time can be supplied at all times without smell and sliminess. Furthermore, the filter itself is miniaturized, and a bath filter having an excellent effect that the filter member can be easily replaced can be obtained. In particular, the filter material is fibrous, linear, thread-like, string-like, mesh-like, non-woven fabric, The effect is large when using at least one selected from a sponge having open cells or a plate having innumerable holes.
The structure of this filter is preferably a bellows type or a cylinder type.

In the present invention, the filter material is mainly composed of at least one metal selected from copper, zinc, tin or lead, and the shape of the filter material is fibrous, linear, thread-like or string-like. , A mesh, a cloth, a nonwoven fabric, a sponge having open cells, or a plate having an infinite number of holes.
Further, it is particularly preferable in the present invention that copper or copper-plated fiber is used as the filter material. When copper is made into a fibrous shape and a thread shape, a copper wire is drawn into a fibrous shape to form fibers at an appropriate stage. A filament or a non-woven fabric is formed from the fibers, and a string, a net, or a woven fabric is formed from the yarn. The plate-shaped body having innumerable holes is prepared by making appropriate holes in the copper plate, but this hole may have any shape, for example, triangle, circle, ellipse, square, pentagon, hexagon, A hole such as a polygon is formed.

The filter member made of copper of the present invention may be mixed with copper-plated fibers or non-copper-plated fibers such as natural fibers, synthetic fibers and inorganic fibers unless the effects of the present invention are impaired. Alternatively, silver-plated fibers may be mixed. Examples of the natural fiber to be plated include cotton, hemp, and regenerated cellulose, and examples of the synthetic fiber include polyamide, acrylic, polyolefin (eg, polyethylene), polyester, aramid, polyurethane, vinyl chloride, carbon fiber and the like. Is. Examples of the inorganic fiber include wollastonite and asbestos. These natural fibers, synthetic fibers, and inorganic fibers are natural fibers,
The synthetic fibers and the inorganic fibers may be used alone or in combination of two or more. The mixing ratio of these is 40%
It is preferably 30% or less. When copper is formed into a fibrous shape, the thickness of these copper fibers is 0.1 to 20 d.
When (d = denier), if it is thinner than 0.1d, it will be difficult to pass bath water or spinning will be difficult, and if it is thicker than 20d, spinning will be unfavorable.

Although the filter member used in the present invention is made of only copper, it may be mixed with copper-plated fiber, silver-plated fiber or other metal as described above. Further, a thread, a string, a non-woven fabric, a cloth, or a mesh made of only copper-plated fibers may be formed, or non-copper-plated fibers may be combined with these. The amount of copper fiber added is arbitrary,
Although not particularly limited, it is preferably 80%, more preferably up to 50%. When the non-copper-plated fiber is included, its content is 0 to 70 parts by weight, preferably 0 to 50 parts by weight, based on the copper fiber. If the content of the non-copper-plated fiber exceeds 70 parts by weight, the antibacterial property and the bactericidal property are insufficient for the purifying effect. Further, the mixed form of silver-plated fibers and / or non-copper-plated fibers will be explained. (A) Whether the fibers obtained by mixing copper fibers with copper-plated fibers and non-copper-plated fibers are spun into yarn Or a non-woven fabric, (b) a string is formed by using the yarn, or a yarn made of only copper-plated fiber and a yarn made of only non-copper-plated fiber are spun to form a yarn, or copper Fibers and copper-plated fibers alone and three types of non-copper-plated fibers are spun into yarns, or (c) these yarns are used to form cloths, nets, etc. There is any one of the modes.

When the copper fibers, the copper-plated fibers, and the non-copper-plated fibers are mixed in advance, they can be mixed in such an amount that the antibacterial or bactericidal action is not lost. 1 per m ^{2 of} non-woven fabric
It can be adjusted by changing the amount to 100 g. It is preferably 1 to 50 g / m ² . Copper content can not be obtained but a sufficiently satisfactory effect of the antimicrobial to the bactericidal action is less than the nonwoven fabric 1 m ² per 1 g / m ^2, also the amount of copper nonwoven fabric 1 m ² per 1
If it is more than 00 g / m ² , the effect as a fiber is lost and the fiber cannot be processed. In the present invention, the method of plating silver or copper on the fiber includes an electroless plating method, a vacuum deposition method and the like, but the electroless plating method is excellent in mass productivity. The amount of copper with respect to the copper-plated fiber used in the present invention is 1 to 50% by weight.
(Copper weight / copper plated fiber weight), preferably 1 to 30% by weight. If the plating amount of copper is less than 1% by weight, the fibers cannot be sufficiently coated with copper and the antibacterial or bactericidal action is not satisfactory, and if it exceeds 50% by weight, the flexibility is reduced and the effect as a fiber is obtained. No fiber processing is possible.

The bathtub filter of the present invention has a filter member, and this filter member has a structure having copper, and its mode is as follows. (1) A filter member is composed of only copper fibers. (2) Form a wound filter member using copper yarn. (3) A string is formed by using a copper thread, which is wound into a tubular shape to form a filter member. (4) A non-woven fabric is formed from copper fibers to obtain a filter member. (5) A cloth is formed from copper threads to form a filter member. (6) A mesh is formed from silver threads or strings to form a filter member. (7) forming an irregular assembly of copper wires,
Use as a filter member. (8) A copper plate having innumerable holes is stacked to form a filter member. In this case, the positions of the holes may be the same or different. However, if the positions of the holes are different, it goes without saying that a passage for bath water is provided. It is also clear that the filter member mainly composed of copper may be combined with copper-plated fiber and non-copper-plated fiber.

In addition, in the present invention, zinc, tin and lead can be processed in the same manner as copper and used as a filter member. That is, zinc, tin, and lead can be formed into fibrous, linear, thread-like, string-like, mesh-like, non-woven fabric, sponge-like with open cells, or plate-like body with innumerable holes, and also galvanized. It can also be used as fiber, tin-plated fiber, lead-plated fiber. Further, these filter members can be used in a tubular type or a bellows type. The bath filter of the present invention may be used in combination with a conventional bath filter, in which case, for example, a sheet filter using a filter paper, a porous resin, or
Examples include porous filters such as zeolite, pumice stone, diatomaceous earth, allophane, and barley stone. It goes without saying that it can be used in combination with a filter for filtering larger suspended matter.

[0013]

In the present invention, since the filter member is made of copper or the like, it has excellent antibacterial and bactericidal properties for a long period of time. In addition, since the filter member is formed by processing this copper or the like into threads, wires, strings, non-woven fabrics, cloths, nets, etc., it has excellent filterability for bath water over a long period of time and is capable of sufficient purification and excellent antimicrobial properties. And it has a bactericidal action. Moreover, replacement of the filter member is easy. Therefore, a bath filter made mainly of copper-plated fiber or copper can purify bath water for a long period of time, and also has the same antibacterial and bactericidal properties, and is always odorless and slimy. Hot water can be supplied and replacement is easy.

[0014]

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 FIG. 1 is a perspective view showing the structure of a filter member of the present invention. As shown in FIG.
A cylindrical filter structure 43a packed in a cylinder 45 having 4
Was used in a bathtub to test the filterability, sterilization and durability of bath water. The inner tube 44 has a large number of small holes on its wall surface or is made of a wire mesh material to form a tubular body. The results obtained are shown in Table 1.

[0016]

[Table 1]

As a filter material, a wire, a thread or a string is produced by using zinc, tin or lead in place of copper fiber, and the wire, thread or string is housed between the supporting plates 2 and 3 inside the filter and shown in FIG. The filter 43a as described above was formed. When this filter 43a was used to test the filterability, bactericidal property and sustainability of bath water, excellent effects similar to those of copper fibers were obtained.

Example 2 FIG. 2 is a perspective view showing another structure of the filter member of the present invention. As shown in FIG. 2, after a non-woven fabric is made of copper fibers, a bellows 47 is formed with this non-woven fabric. After forming the tube 45 and the inner tube 44, it was used as a bellows type filter structure 43b in a bathtub, and the filterability, sterilization and sustainability of bath water were tested in the same manner as in Example 1. The obtained results are shown in Table 2.

[0019]

[Table 2]

A cloth or net is made of zinc, tin, or lead in place of the copper fiber non-woven fabric, and a bellows 47 is formed with this, and the cylinder 45 and the inner tube 44 are set in the bellows type filter structure. 43b was used in a bathtub, and the filterability, bactericidal property, and sustainability of bath water were tested in the same manner as in Example 1. As a result, the same excellent effect as that of the copper fiber nonwoven fabric was obtained.

Example 3 By the electroless plating method shown below, acrylic fiber (1.5 d × 38 mm) and aramid fiber (2
d × 51 mm) was plated with copper. First, as a base treatment for electroless copper plating, acrylic fiber is dipped in a refining agent, washed with water, and then stannous chloride 10 g / liter, 35% hydrochloric acid 20
After soaking in an aqueous solution containing milliliters / liter,
After washing with water to impart catalytic properties, 10% by weight of copper was coated with a predetermined amount of an electroless copper plating solution having the following composition.
Similarly, after priming, the aramid fiber was coated with 30% by weight of copper. Since all the copper ions in this plating solution are reduced and deposited, an amount of plating solution containing the desired amount of copper ions was used.

[Electroless Copper Plating Solution] (10 g of copper) (30 ° C.) Tetrasodium ethylenediamine tetraacetate 100 g / 2 liters Copper sulfate 40 g / 2 liters Sodium hydroxide 20 g / 2 liters Formalin 100 ml / 2 liters Ferric sulfate 10 mg / 2 liter

Using the copper-plated fiber obtained above, a cylindrical filter structure 43a shown in FIG. 1 was manufactured.
Further, a non-woven fabric was prepared using 50 parts of copper-plated fiber, and the non-woven fabric was used to construct the structure 4 of the bellows type filter shown in FIG.
3b was manufactured. When these two types of filters were used as bath water filters and tested, these bath water filters were able to pass bath water without hindrance, had excellent sterilization properties, and had excellent sustainability. , 6
Replacing once a month was enough. Similarly, when polyamide fiber, polyester fiber, polypropylene fiber and rayon fiber were also copper-plated to prepare a bath water filter, the same excellent effects of the present invention as those using acrylic fiber were obtained.

Example 4 Acrylic fibers and aramid fibers were plated in the same manner as in Example 3 except that the following electroless tin plating solution was used instead of the electroless copper plating solution. A nonwoven fabric was prepared in the same manner as in Example 3, and then a bellows-type filter for bath water was prepared and tested. This filter for bath water can pass through the bath water without trouble and is excellent in bactericidal property, and It was also excellent in its sustainability.

[Electroless tin plating solution] (25 ° C.) Stannous chloride 120 g / liter Hydrochloric acid 100 ml / liter Thiourea 200 g / liter Sodium hypophosphite 70 g / liter Tartaric acid 90 g / liter

Example 5 A copper non-woven fabric, cloth and net were prepared in the same manner as in Example 1 and cut into 1 cm squares to form a filter member.
This was replaced with the copper fiber 46 shown in FIG. 1 and housed to form a cylindrical filter 43a. Using this filter 43a, the filterability, bactericidal property and sustainability of bath water were tested in the same manner as in Example 1. Table 3 shows the obtained results.

[0027]

[Table 3]

Embodiment 6 FIG. 3 shows a circulating heat insulation purifying apparatus for bath water using the bath water filter of the present invention. In FIG. 3, reference numeral 10 denotes a cover for covering the entire apparatus. The cover 10 is a box-shaped main body 10a and an upper lid 1 placed on the upper end surface of the main body 10a.
0b and 0b. Further, cylindrical support cylinders 11 and 12 are inserted into the main body 10a from above, and upper ends of the support cylinders 11 and 12 are closed from above by lids 11c and 12c each having a bottomed cylindrical shape. ing. At the center of the lower end surface of the support cylinder indicated by reference numeral 11, a cylindrical outlet 11a coaxial with the support cylinder 11 is provided.
It is provided integrally with. A cylindrical wound filter (filtering means) 13 having a diameter slightly smaller than that of the support cylinder 11 is provided inside the support cylinder 11, and a hollow portion 13a provided at the center thereof is attached to the outlet 11a at its lower end. In the combined state, it is detachably provided upright so as to be coaxial with the support cylinder 11 through the space s ₁ . This spool filter 13
Mainly collects micron-order suspended matter.

The upper end of the spool filter 13 has a hollow portion 1
It is closed by a holding plate 14 engaged with 3a from above, and a disc-shaped pre-filter (filtering means) 15 is detachably mounted above the holding plate 14. Here, the outer diameter of the pre-filter 15 is the same as the inner surface of the support cylinder 11, and as a result, the support cylinder 11 is closed by the pre-filter 15 at the upper end thereof. The pre-filter 15 has a floating substance larger than the collection target of the spool filter 13 as a collection target. Furthermore, the support cylinder 1
An inflow port 11b is integrally provided with the support cylinder 11 above the pre-filter 15 of No. 1, and
It is connected to a water inlet pipe 16 extending from a water inlet (not shown) via 1b. Then, from the support cylinder 11, the spool filter 13, and the pre-filter 15,
The primary purification means 17 is roughly configured.

On the other hand, at the center of the lower end surface of the support cylinder indicated by reference numeral 12, a cylindrical connecting portion 12a coaxial with the support cylinder 12 is provided.
Are integrally provided with the support cylinder 12. In addition, a cylindrical container 18 having a diameter slightly smaller than that of the support cylinder 12 is provided in the support cylinder 12 and an inflow port 18a provided at the center of the lower end thereof.
In a state of being engaged with the connecting portion 12a, it is erected so as to be coaxial with the support cylinder 12 through the space s ₂ . Container 18
Inside, there are support plates 2 and 3 having innumerable through holes provided below and above, and a copper filter member 43 is housed between them. This copper filter member 43
As for, the bellows type filter 43b shown in FIG. 2 is housed. An outlet port 18b that opens to the side is formed at the upper end of the container 18, and a cylindrical connecting portion 12b is provided at a position on the lower end surface of the support cylinder 12 adjacent to the connecting portion 12a.
It is provided integrally with the support cylinder 12. The support cylinder 12 is connected to a water outlet pipe 19 extending to a water outlet (not shown) via the connecting portion 12b. A heater (heat-retaining means) 20 in which a heating element such as a heating wire is embedded in a block made of aluminum alloy is installed in the water discharge pipe 19, and the bath water is inserted into the heater 20 to remove the bath water. It can be heated / heated to a predetermined temperature. Further, a pump 21 is installed at the bottom of the main body 10a at a position sandwiched between the support cylinders 11 and 12. This pump 21
A suction port 21a and a discharge port 21b are formed at the lower end portions of the support cylinder 11 and the suction port 21a and the discharge port 21b, respectively.
and a are connected to each other via conduits 22 and 23, respectively.

Next, the operation of the bath water circulation heat insulation purifying apparatus having the above structure will be described below. First, priming water for preventing idling of the pump 21 due to the inflow of air into the pump 21 is introduced into the support cylinders 11 and 12 and the pump 21. In this state, when the water inlet is immersed in the bath water in the bath and the water outlet is opened on the bath to operate the pump 21, the bath water in the bath causes the water pump 16 and the water outlet 11b to move. It flows into the upper end portion of the support cylinder 11 via the. The inflowing bath water is prefilter 1
5 on top, first with pre-filter 15 body hair, earth and sand,
Relatively large suspended matter such as dirt or lint is collected and filtered. After the bath water filtered by the pre-filter 15 is filled in the pre-filter 15, the power and the pump 21
The squeezed bath water that infiltrates from the lower end surface of the pre-filter 15 fills the space s ₁ , and due to the internal pressure of the filled bath water and the action of the pump 21, the diametrically inward radial direction from the outer peripheral surface of the spool filter 13. And moves toward the hollow portion 13a from the inner peripheral surface of the spool filter 13. As a result, micron-order suspended matter in the bath water is collected on the outer peripheral surface of the bobbin filter 13 and in the bobbin filter 13, and bath water containing almost no suspended matter flows into the hollow portion 13a.

The bath water flowing into the hollow portion 13a reaches the inside of the pump 21 through the outlet 11a, the pipe line 22 and the suction port 21a by the action of the pump 21, and further the discharge port 21.
It flows into the container 18 through b, the pipe line 23, the connecting portion 12a, and the inflow port 18a. By passing through the container 18 and rising, the bath water flows out to the outside through the bellows of the bellows type filter member 43b made of a non-woven fabric of copper fiber, and is sterilized by the filter member 43b at this time, resulting in a flow. From the outlet 18b, in addition to the suspended matter, clean bath water containing almost no germs and dissolved nitrogen compounds is overflowed into the space s ₂ .

The bath water overflowed from the outlet 18b gradually flows into the water outlet pipe 19 from the space s ₂ through the connecting portion 12b by the action of gravity and the pump 21.
After being heated and kept at a predetermined temperature by being inserted through a heater 20 provided in the water outlet pipe 19, the water is recovered from the water outlet into the bath. Here, an example using the bellows type filter 43b shown in FIG. 2 is given, but the copper filter member of the form shown in FIG. 1 also has excellent filter performance and antibacterial property similar to that shown in FIG. To excellent in bactericidal property, and excellent in that the effect lasts for a long time. In this embodiment, the wound filter 13 and the pre-filter 15 have the primary cleaning means 17 to collect and filter relatively large suspended matter such as body hair, earth and sand, dirt, and thread waste. Even when only the bellows-type filter 43 is installed without providing the primary purification means 17, the primary purification means 17 sufficiently serves as the primary purification means.

[0034]

INDUSTRIAL APPLICABILITY The present invention uses a fibrous material such as copper or a plated fiber such as copper as a filter member, so as to supplement a relatively large suspended matter only by using the filter member. Not only can it be collected and filtered, but it is also excellent in microbial and antibacterial properties, and its sustainability is also excellent. Therefore, it is extremely preferable as a filter member for a 24-hour bath. Further, the copper fiber can be easily made into a non-woven fabric, the filter can be easily formed and the size thereof can be reduced, and the copper fiber can be processed into various shapes such as a bellows shape and a cylinder shape in consideration of water flow and the like. Therefore, the bactericidal effect can be further enhanced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a structure of a filter member of the present invention.

FIG. 2 is a perspective view showing the structure of another embodiment of the filter member of the present invention.

FIG. 3 is a perspective view showing a 24-hour bath cleaning device using the filter member of the present invention.

[Explanation of symbols]

2, 3 Support plate 14 Holding plate 43, 43a, 43b Filter member 15 Pre-filter 44 Internal pipe 17 Primary purification means 45 Cylinder 18 Container 46 Copper (copper plated) nonwoven fabric 16 Water inlet pipe 47 Bellows 19 Water outlet pipe 10 Cover 20 Heater 10a Main body 21 pump 10b upper lid 22,2
3 Pipe lines 11,12 Support cylinders 30,3
DESCRIPTION OF SYMBOLS 1 rectifying plate 11a, 18b Outlet 32 Upper chamber 11b, 18a Inlet 33 Lower chamber 11c, 12c Lid 34 Secondary filtration means 12a, 12b Connection part S ₁ , S
₂ space 13 spool filter L water surface of bath water 13a hollow part

Claims (5)

[Claims] 1. A filter for a bathtub, wherein the filter material is at least one selected from copper, zinc, tin or lead. 2. The filter material is fibrous, linear, thread-shaped,
The bath filter according to claim 1, wherein the filter member is a filter member made of at least one selected from a string shape, a net shape, a cloth shape, and a non-woven fabric. 3. The bath filter according to claim 1, wherein the filter material is a filter member made of at least one selected from a spongy material having open cells or a plate material having innumerable holes. . 4. The filter material according to claim 1, wherein the filter material is at least one selected from copper-plated fiber, zinc-plated fiber, tin-plated fiber and lead-plated fiber. Bathtub filter. 5. The bathtub filter according to claim 1, wherein the structure of the filter is a bellows type or a tubular type.