JP2005074058A - Bathtub water purifying apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To dissolve the enlargement of a pressure loss due to clogging when used even if a filter area is small. <P>SOLUTION: This bathtub water purifying apparatus is provided with a circulating pump 4 circulating bathtub water 2, a filtering means 6 having a filter 5 removing suspended solids in the bathtub water, and a flow passage selector valve changing over the direction of the bathtub water passing to the filtering means between the outflow and the inflow according to the bathtub water purification or the washing. The water flow passing to the filtering means is a rotational flow turning the filter surface. This constitution can produce the water flow on the filter surface to prevent the clogging of the filter and miniaturize the filter area necessary for the purification. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a bathtub water purification device that simply purifies bathtub water.

Suspended particles that become bath water stains include coarse particles such as hair and dust, particles such as stratum corneum peeled from the skin (particle size 20 μ to 100 μ), and fine particles such as bacteria (particle size 1 μ or less), An apparatus for purifying and sterilizing bathtub water is known as providing bathtub water that can always be taken without replacing the bathtub water. In addition, on the premise that the bath water is replaced, as a simple purification that removes coarse particles such as hair and dust in the bath water, and particles such as the stratum corneum peeled off the skin, the bath water is circulated with a circulation pump, There is known a circulating bath water purification device that is purified by the method and then returned to the bathtub. As a purification | cleaning part, the method (for example, refer patent document 1) which removes suspended particles in bathtub water using a granular filter medium, the method which removes suspended particles using a hollow fiber membrane, a filter cloth, a porous filter, etc. Is formed into a pleated shape, a cylindrical shape, or a flat plate shape to remove suspended particles (see, for example, Patent Document 2).
JP-A-11-267414 Japanese Patent Laid-Open No. 11-9914

  However, in order to filter suspended particles having a particle diameter of 20 μm with a conventional bathtub water purification apparatus using a granular filter medium, it is necessary to use a granular filter medium with a small particle diameter and to increase the height of the filter medium filling. There was a problem that the pressure loss of the cleaning part increased and the size of the purification part increased. Moreover, when a granular filter medium was used, there existed a subject that a granular filter medium might leak at the time of washing | cleaning.

  The method using a hollow fiber membrane can remove suspended fine particles of 1 μm or less, but has a problem that washing is difficult and reverse washing efficiency is poor. In addition, a filter cloth or a porous filter formed in a pleated or cylindrical shape to remove suspended particles has a problem that backwashing efficiency is low as in the case of a hollow fiber membrane filter, and has a high strength. The porous filter has a problem of high price. In the flat filter, the filter area can be reduced and the purification section can be configured at a low price. However, since the area is reduced, there is a problem that clogging occurs during use and pressure loss increases.

  In order to solve the above-mentioned conventional problems, the present invention provides a circulation pump for circulating bath water, a filtering means having a filter for removing suspended substances in the bath water, and a filtering means at the time of bath water purification and washing. And a flow path switching valve that switches the inflow / outflow direction of the bath water that flows into the filter, and the flow of water that passes through the filtering means is a swirling flow that swirls around the filter surface. By creating a flow and preventing the entire filter from being clogged, the filter area required for purification can be reduced, and simple purification can be performed at a small size and at a low cost.

  The bathtub water purification apparatus of the present invention creates a flow of water on the filter surface by preventing the clogging of the filter from being caused by a swirling flow that swirls the filter surface. Therefore, it is possible to reduce the filter area required for purification, and it is possible to realize purification that is small and inexpensive.

  1st invention is the outflow of the bathtub water which flows into the filtration means at the time of the circulation pump which circulates bathtub water, the filter which removes the suspended substance in bathtub water, and the bathtub water purification | cleaning and washing | cleaning It is equipped with a flow path switching valve that switches the inlet direction, and the flow of water that passes through the filtering means is a swirling flow that swirls around the filter surface, creating a flow of water on the filter surface and clogging the filter entirely. Therefore, it is possible to reduce the filter area necessary for purification, and it is possible to realize simple purification with a small size and low cost.

  In the second aspect of the invention, particularly during the cleaning of the first aspect of the invention, after the surface of the suspended matter deposited on the filter surface is separated by swirling flow, the flow direction of the water flowing into the filtering means is switched and the inside of the filter is switched. The backwashing efficiency of the filter can be increased by adopting a configuration in which the backwashing is performed.

  According to the third aspect of the present invention, the backwashing efficiency of the filter can be improved by providing a bubble mixing part on the downstream side of the filtering means and backwashing the inside of the filter with bubbles mixed by the bubble mixing part at the time of cleaning.

  In the fourth aspect of the invention, in particular, the bubble mixing part of the third aspect of the invention is configured by an ejector, so that air can be mixed by the flow of water, and the inside of the filter is back-washed by the mixed bubbles, Backwash efficiency can be increased.

  5th invention can remove efficiently particles (particle diameter 20micro-100micro), such as a stratum corneum exfoliated from skin, by making the opening diameter of the filter provided in the filtration means into 20-30micro.

  In the sixth aspect of the invention, the filtering means has a structure in which a plurality of filters having different opening diameters in a range of opening diameters of 20 to 100 μm are stacked, so that a filter having a large opening diameter can be used as a prefilter. The load on the small filter can be reduced and clogging can be prevented.

  In the seventh aspect of the invention, in particular, the particulate filter medium is filled between filters in which a plurality of filters having different opening diameters are stacked, and the surface of the filter is washed by stirring with a water flow of the granular filter medium. The washing efficiency can be increased.

  The eighth invention provides a cake recovery part at the bottom of the filtering means, and the inflow direction of the bath water that passes through the filtering means when purifying the bath water is upward from the lower surface of the filter, thereby swirling suspended substances on the filter surface. It is possible to prevent the clogging of the filter and lengthen the time until the filter is backwashed by washing the cake collecting part at the time of washing. I can do it.

  According to the ninth aspect of the present invention, a filter with good durability can be obtained by forming the filter as a non-woven cloth laminated and sintered in a metal fiber woven or felt shape.

  According to a tenth aspect of the present invention, the filter includes a stretchable metal fiber filter made of knit knitting having stretchability and a reinforcing plate, and the suspension metal prevents the stretchable metal fiber filter from stretching and shrinking during purification. In addition, the backwashing efficiency can be increased by washing the filter by increasing the pore diameter of the stretchable metal fiber filter by water flow during washing.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a configuration diagram of a bathtub water purification device according to Embodiment 1 of the present invention.

  In FIG. 1, a circulation flow path 3 and a circulation pump 4 that circulate the bathtub water 2 of the bathtub 1 are a purifier 6 provided with a filter 5 therein, and a first switching valve provided upstream and downstream of the purifier 6. 7 and the second switching valve 8 are connected. The first switching valve 7 is connected to the drainage flow path 9, and the second switching valve 8 is connected to the hot water supply heat source 10 through a pipe 11. The circulation channel 3 is connected to the bathtub 1 by an adapter 12, and the adapter 12 has a discharge part 13 and a suction part 14.

  The purifying means 6 includes a cylindrical can body having a filter 5 in which a stainless woven filter 15 having an opening diameter of 27 μm and a reinforcing plate 16 and a sintered molding are formed therein, and a pipe 17 connected to the first switching valve 7 and a first one. The pipe 18 connected to the second switching valve 8 is connected in the tangential direction of the cylindrical can body.

  With the above configuration, during the purification operation, the bath water 2 is circulated by the circulation pump 4 through the suction portion 14, the circulation flow path 3, and the first switching valve 7, and is supplied to the purification means 6 through the pipe 17. The bathtub water 2 supplied to the purification means 6 flows as a swirling flow on the surface of the filter 5. Suspended particles in the bathtub water 2 are captured on the filter 5, and the suspended water is removed and purified water is removed. The pipe 17 and the second switching valve 8 are circulated from the discharge unit 13 to the bathtub 1. Since the surface of the filter 5 has a swirl flow formed by the pipes 17 connected in the tangential direction, suspended particles trapped on the filter 5 are accumulated by the flow and can prevent clogging of the entire surface of the filter 5. I can do it.

  At the time of cleaning the filter 5, the first switching valve 7 and the second switching valve 8 are switched to reverse the flow of water flowing through the purifying means 6 and clean the filter. Wash water from the hot water supply heat source 10 is supplied to the purification means 5 through the pipe 11 and the second switching valve 8 through the pipe 18. Suspended particles captured by the filter 5 are removed by the water flow, and the wash water is drained through the first switching valve 7 and the drainage flow path 9.

  In this way, the flow of water that passes through the filtering means is a swirling flow that swirls the surface of the filter 5, thereby creating a flow of water on the surface of the filter 5 and preventing clogging of the entire filter. It is possible to reduce the filter area required for purification, and it is possible to realize simple purification with small size and low price.

  The pore size of the filter 5 is related to the particle size of suspended solids in the bath water after bathing. By removing suspended particles of 20μ or more, the bath water after bathing feels clean (turbidity). As a result, it has been experimentally confirmed to reach 0.8). When the aperture diameter of the filter 5 is 20 μm or less, the clogging of the filter is unnecessarily accelerated, the pressure loss of the filter is increased, and the cleaning efficiency is deteriorated. In addition, if the pore size of the filter 5 is 40 μm or more, suspended particles in the bath water cannot be completely removed, and the level at which a person feels the bath water after bathing is clean (turbidity is 0.8). It has also been experimentally confirmed that it cannot be purified by By setting the pore diameter of the filter 5 provided in the filtering means 6 to 20 to 40 μm, particles such as stratum corneum peeled from the skin (particle diameter 20 μm to 100 μm) can be efficiently removed.

  Moreover, a filter with good durability can be obtained by making the filter into a non-woven cloth that is laminated and sintered in the form of a metal fiber fabric or felt.

(Embodiment 2)
FIG. 2 is a configuration diagram of the bathtub water purification device according to Embodiment 2 of the present invention.

  In FIG. 2, the same reference numerals as those in the first embodiment have the same configuration and perform the same operation, and the description thereof is omitted.

  The purifying means 7 has a cylindrical can body having a filter 5 in which a stainless woven filter 15 having an opening diameter of 27 μm and a reinforcing plate 16 and a sintered molding are formed inside, and the first switching valve 7 and the upstream side of the filter 5 A connected piping 17, a cleaning piping 20 connected to the drain valve 19, and a piping 18 connected to the second switching valve 8 are connected to the downstream side of the filter 5. The drain valve 19 is connected to the drain channel 9, and the wash water that has cleaned the surface of the filter 5 is drained from the drain channel 9. In addition, a bubble mixing part 21 is connected to the pipe 18. The bubble mixing part 21 is composed of an ejector and can mix air by the flow of water.

  With the above configuration, during the purification operation, the drain valve 19 is closed, and suspended substances in the bath water are captured on the surface of the filter 5 by the same operation as in the first embodiment.

  When cleaning the filter 5, first, the drain valve 19 is opened, and the cleaning water from the hot water supply heat source 10 is supplied to the purification means 6 through the pipe 17. The cleaning water cleans the surface of the filter 5 and is drained from the drainage channel 9 through the drain valve 19. Next, by switching the first switching valve 7 and the second switching valve 8, the flow of water passing through the purification means 6 is reversed, and the bubble mixing part 21 is connected via the pipe 11 and the second switching valve 8. The cleaning water mixed with bubbles is supplied to the purification means 5 through the pipe 18. Suspended particles trapped in the filter 5 by the water flow and bubbles are removed, and the wash water is drained through the first switching valve 7 and the drainage flow path 9.

  In this way, after washing the surface to remove the suspended matter accumulated on the filter surface, the flow of water passing through the filtration means is switched, and the inside of the filter is backwashed so that the filter is backwashed. Efficiency can be increased.

  Moreover, the backwashing efficiency of a filter can be improved by providing a bubble mixing part in the downstream of a filtration means, and backwashing the inside of a filter with the bubble mixed by the bubble mixing part at the time of washing | cleaning.

(Embodiment 3)
FIG. 3 is a configuration diagram of the purifying means in Embodiment 3 of the present invention.

  In FIG. 3, the purifying means 22 includes a first filter 25 formed by sintering a stainless woven filter 23 having an aperture diameter of 50 to 100 μm and a reinforcing plate 24 and a stainless woven filter 26 having an aperture diameter of 27 μ It has a cylindrical can body having a second filter 28 formed into a form, and pipes 17 and 18 are connected to the upstream side of the first filter 25 and the downstream side of the second filter 28. The first filter 25-uses a filter having a larger opening diameter than the second filter 28.

  In the above configuration, the bathtub water 2 supplied to the purifying means 22 can capture coarse particles suspended in the first filter 25, and can capture small particles suspended in the second filter 28. The clogging can be prevented by reducing the load of the second filter having a small opening diameter.

  In this way, the filtering means has a structure in which a plurality of filters having different opening diameters in a range of 20 to 100 μm are stacked, so that a filter having a large opening diameter can be used as a prefilter, and a filter having a small opening diameter. Can be reduced and clogging can be prevented.

(Embodiment 4)
FIG. 4 is a configuration diagram of the purifying means in Embodiment 4 of the present invention.

  In FIG. 4, the purifying means 22 includes a first filter 25 formed by sintering a stainless woven filter 23 having an opening diameter of 50 to 100 μm and a reinforcing plate 24 and a stainless woven filter 26 having an opening diameter of 27 μm and a reinforcing plate 27. It has a cylindrical can body having a second filter 28 formed into a form, and pipes 17 and 18 are connected to the upstream side of the first filter 25 and the downstream side of the second filter 28. A particulate filter medium 29 is filled between the first filter 25 and the second filter 28. As the particulate filter medium, glass beads, ceramic beads and the like can be used.

  In the above-described configuration, the flow of water that passes through the purification means 22 is reversed during cleaning, so that suspended substances captured by the second filter 28 and the first filter 25 are removed and drained. At this time, the granular filter medium 29 is agitated by the water flow, and the granular filter medium 29 mechanically peels off the dirt on the surface of the second filter 28, thereby improving the cleaning efficiency.

  Thus, the backwashing efficiency can be improved by washing the surface of the filter by stirring the granular filter medium with a water flow during washing.

(Embodiment 5)
The filter according to Embodiment 5 of the present invention has a configuration in which a lower part of a stretchable metal fiber filter constituted by knit knitting having elasticity is reinforced by a reinforcing plate.

  In the above configuration, the elastic metal fiber filter is prevented from expanding and contracting by the reinforcing plate at the time of purification, so that the porosity of the elastic metal fiber filter is kept small, and suspended substances in the bath water are captured. Water is passed from the downstream side, and the stretchable metal fiber filter is deformed by the water flow to increase the aperture diameter of the stretchable metal fiber filter and clean the filter.

  Thus, backwashing efficiency can be improved by changing the hole diameter at the time of washing | cleaning by the elasticity of a filter.

  As described above, since the bathtub water purification apparatus according to the present invention can be purified in a small size and at a low price, it can be applied to uses such as purification of an appreciation fish tank and purification of rainwater.

The block diagram of the bathtub water purification apparatus in Embodiment 1 of this invention The block diagram of the bathtub water purification apparatus in Embodiment 2 of this invention The block diagram of the purification | cleaning means of the bathtub water purification apparatus in Embodiment 3 of this invention The block diagram of the purification means of the bathtub water purification apparatus in Embodiment 4 of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bathtub 2 Bath water 3 Circulation flow path 4 Circulation pump 5 Filter 6 Purification means 7 1st switching valve 8 2nd switching valve 9 Drain flow path 10 Hot water supply source 12 Adapter 13 Discharge part 14 Suction part 15 Stainless steel woven filter 16 Reinforcement Board 21 Bubble mixing part

Claims (9)

A circulation pump for circulating bath water, a filtering means having a filter for removing suspended substances in the bath water, and a flow path for switching the inflow / outflow direction of the bath water flowing into the filtering means at the time of purifying and washing the bath water A bathtub water purification apparatus comprising a switching valve, wherein the flow of water passing through the filtering means is a swirling flow swirling around the filter surface. 2. The bath water according to claim 1, wherein at the time of cleaning, the surface of the suspended matter accumulated on the filter surface is peeled off by swirling flow, and then the direction of water flowing into the filtering means is switched to reversely clean the inside of the filter. Purification equipment. A bubble mixing part is provided on the downstream side of the filtering means, and when the inside of the filter is back-washed by switching the inflow / outflow direction of the water flowing through the filtering means, the inside of the filter is back-washed with bubbles mixed by the bubble mixing part. Item 3. A bath water purifier according to item 1 or 2. The bathtub water purification device according to claim 3, wherein the bubble mixing part is constituted by an ejector, and air is mixed by a flow of water. The bathtub water purification apparatus according to any one of claims 1 to 4, wherein an opening diameter of a filter provided in the filtering means is 20 to 40 µm. The bathtub water purification apparatus according to any one of claims 1 to 4, wherein the filtering means includes a plurality of filters each having a filter opening diameter of 20 to 100 µm and having different opening diameters. The bathtub water purification apparatus according to claim 6, wherein a granular filter medium is filled between filters in which a plurality of filters having different opening diameters are stacked, and the surface of the filter is cleaned by stirring the granular filter medium with a water flow during cleaning. The bathtub water washing apparatus according to any one of claims 1 to 7, wherein the filter is a non-woven cloth laminated and sintered in a metal fiber fabric or felt shape. The filter is provided with a stretchable metal fiber filter made of knit knitting with elasticity and a reinforcing plate. During purification, the reinforcing plate prevents the stretchable metal fiber filter from expanding and contracting and filters suspended particles, and is washed. The bathtub water cleaning apparatus according to any one of claims 1 to 7, wherein the filter is cleaned by increasing the aperture diameter of the stretchable metal fiber filter sometimes by a water flow.

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