JP3613848B2 - Bath purification equipment - Google Patents

Description

【００５３】
図６は逆洗浄における活性炭中の菌数の推移を示す図、図７は洗浄排水の過マンガン酸消費量の推移を示す図、図８は洗浄排水のＳＳ分量の推移を示す図である。図６、７、８においてサンプリングは、逆洗浄前、３０秒洗浄後、６０秒洗浄後、９０秒洗浄後、１２０秒洗浄後に行った。
【００５４】
図７の過マンガン酸消費量については、洗浄９０秒、１２０秒の値はほぼ洗浄前の値を同じであり、洗浄３０秒、６０秒の値は洗浄前の値より大きく、特に３０秒の値は顕著であった。
また、図８のＳＳ分量についても同様であった。よって、上記の過マンガン酸消費量、ＳＳ分量は共に大きい値であるほど洗浄効果が高いことを示すことから、濾材は初期の６０秒間、洗浄水供給５〜６リットルでほぼ洗浄されることが判った。
【００５５】
しかしながら、図６の活性炭中の菌数については、洗浄前の値１．２×１０^７ 個が洗浄３０秒、６０秒、９０秒、１２０秒で共に１０^６ 個のオーダー以下にならず、浄化に十分な値以下までに間引きされないことが判った。
よって、本発明の逆洗浄機構において、少ない洗浄水供給で濾材の洗浄能力が高く、濾材中の分解菌数を常に十分な値に保持できることが判った。
【００５７】
【発明の効果】
以上のように、濾過槽を濾過内槽と濾過外槽からなる二重槽構造とし、濾材を充填した濾過内槽を濾過外槽に挿入し、濾過内槽の外周と濾過外槽の内周との間に浴水を流通させる環状流路を形成したことによって、濾層からの洗浄水は放射状に迅速に環状流路から排出され、ＳＳ分を満遍なく排出でき、濾材の洗浄能力の大きい逆洗浄機能を有する浴槽用浄化装置が得られるという効果がある。
【００５８】
さらに、スペーサにより濾過槽の上蓋内面と濾過内槽の上縁との間に、濾材よりも小さい空間を有する間隙流路を形成したことによって、分離装置を設けることなく、ＳＳ分を含んだ洗浄水とリフト管で抜き出された濾材を確実に分離でき、コンパクト性に優れた浴槽用浄化装置が得られるという効果がある。
【００５９】
また、リフト管の吸入口を放射渦状に形成したことによって、エジェクタに濾材と対流する洗浄水を吸入口に引き込む時に、放射渦状の吸入口によりリフト管内に渦流を発生させ、ＳＳ分の遊離をより効果的に行える浴槽用浄化装置が得られるという効果がある。
【図面の簡単な説明】
【図１】この発明の一実施の形態を示す浴槽用浄化装置の構成図である。
【図２】この発明の一実施の形態を示す浴槽用浄化装置の濾過槽の断面図である。
【図３】この発明の一実施の形態を示す浴槽用浄化装置の濾過槽の流路図である。
【図４】この発明の一実施の形態を示す浴槽用浄化装置の濾過槽の断面図である。
【図５】この発明の一実施の形態を示す浴槽用浄化装置の濾過槽の断面図である。
【図６】この発明の浴槽用浄化装置による逆洗浄における活性炭中の菌数の推移を示す図である。
【図７】この発明の浴槽用浄化装置による洗浄排水の過マンガン酸消費量の推移を示す図である。
【図８】この発明の浴槽用浄化装置による洗浄排水のＳＳ分量の推移を示す図である。
【図９】従来のリフト式の生物濾過装置の断面図である。
【図１０】従来のリフト式の浄化ユニットの断面図である。
【図１１】従来のリフト式の浄化ユニットの断面図である。
【符号の説明】
２７ 濾過槽、３３ 濾過外槽、３６ 濾過内槽、３７ 環状流路、４０ 濾材、４４ ノズル、４４ａ 噴出口、４６ リフト管、４６ａ 吸入口、４６ｂ放出口、４７ エジェクタ、４８ 上蓋、４８ａ スペーサ、４８ｂ 間隙流路、５３ 放射渦状羽、５４ 広径部、５５ 整流体[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a purification apparatus for bathtubs that purifies and circulates water in a bathtub using a biological filtration layer and bathes for a long time without replacing bath water.
[0002]
[Prior art]
In a conventional bath purifier that circulates bath water with a pump and purifies it with a filter layer provided in the circulation path, the waste water in the bath (Suspended Solid, hereinafter referred to as SS) is decomposed into biodegradable bacteria. It is known that a biological filtration layer to be purified is used, and barleystone, ceramic balls, porous ceramics, activated carbon and the like are used as a filter medium, either singly or in combination.
[0003]
However, when the bathing frequency is high, an SS component that cannot be decomposed accumulates in the filtration layer, and the filter media stick together to form a lump. For this reason, a part of the filtration layer is clogged, and this clogging condition occurs unevenly. As a result, the bath water partially flows through the filtration layer, causing problems such as a reduction in purification capability and outflow of accumulated SS to the bathtub.
[0004]
In order to prevent these problems, it is necessary to wash the filtration layer in a timely manner. Therefore, the user himself / herself removes the filter medium and manually cleans it, or the reverse cleaning method that removes the SS content by an automatic mechanism, that is, switches the circulation direction of the bath water, circulates from bottom to top, and floats the filter medium. There is a method for removing the SS component when the filter medium is changed from a fine state to a state having a gap.
[0005]
However, manual cleaning is very troublesome for the user, and the adjustment of the cleaning is not appropriate. For example, if the cleaning is insufficient, the above-described purification ability is reduced, and SS flows into the bathtub. End up. Furthermore, when washing is performed excessively, the decomposing bacteria are washed out excessively or the filter medium is damaged. Therefore, a method in which a reverse cleaning mechanism is incorporated in the apparatus as an automatic mechanism and the filtration layer is appropriately cleaned becomes more effective.
[0006]
Therefore, as a reverse cleaning mechanism, a method of reversing the circulation direction of the bath water using a pump incorporated in the purification device for bathtubs is conceivable. Is insufficient. For this reason, it is necessary to incorporate a peeling mechanism for SS.
[0007]
In general, the separation mechanism includes methods such as agitating the filter medium with a motor-driven stirring blade, vibration of the filter medium with a hub ring, and cyclic agitation of a lift-type filter medium used in a continuous sand filter. Incorporated into the purification device. In particular, the lift method is an effective method for cyclically stirring the filter medium, but the filter medium used in the bathtub purification device has a uniform particle shape such as ceramic balls and granular activated carbon, and has a relatively small particle size. Is easy to circulate, and conversely, it is difficult to circulate those having relatively large particle diameters such as barleystone and porous ceramic. Even ceramic balls, granular activated carbon, and the like have a considerably larger particle size than sand, and therefore require some contrivance to allow them to circulate evenly.
[0008]
Moreover, since it is necessary to suppress the decrease in the bath water bath at the time of purification, the washing water is required to be a small amount of 10 liters or less.
Therefore, in order to use the lift type for the purification apparatus for bathtubs, the above must be taken into consideration, and the practical use requires improvement of the mechanism and selection of an appropriate filter medium.
[0009]
By the way, the lift-type basic structure is provided with a cleaning pipe or nozzle at the bottom of the filtration tank, and a lift pipe with both ends opened at a predetermined interval above the pipe or nozzle. An ejector is formed in the vicinity of the outlet. Then, the cleaning water or the cleaning air is discharged from the above-described pipe or nozzle in a single or combined manner, the filter medium is sucked from the suction port (lower end opening) of the lift pipe, and discharged from the discharge port (upper end opening). Thereby, the filter layer is circulated and the filter medium is washed in this process.
[0010]
Hereinafter, a conventional lift type purification apparatus will be described.
First, as Conventional Example 1, FIG. 9 is a cross-sectional view of a lift-type biological filtration device described in, for example, Japanese Utility Model Laid-Open No. 1-101691. A detailed description will be given in the publication, but the configuration will be briefly described.
[0011]
In the figure, the solid line indicates the flow of raw water during filtration, and the alternate long and short dash line indicates the flow of cleaning water during cleaning. Filtration and cleaning are performed simultaneously. The treatment tank 1 has a filtration layer 2 (fixed bed) filled with a filter medium in the middle, the filtration layer 2 is formed by holding the filter medium with a net-like holding body 3, and the bottom of the filtration layer 2 is the holding body 3. It is configured in a mortar shape. A raw water supply pipe 4 is provided in the upper part of the treatment tank 1, and raw water is supplied to the filtration layer 2 from a plurality of supply ports 4 a provided in the raw water supply pipe 4.
[0012]
Reference numeral 5 denotes a filter medium extraction pipe, whose lower end opening 5a is led to the vicinity of the trough of the mortar-shaped holding body 3 at the bottom of the filtration layer 2, and the upper end opening 5b is led to a separation device (described later) outside the processing tank 1. . A washing water pipe 6 is led from the bottom of the treatment tank 1 to the filtration layer 2, and the water discharge port 6 a is inserted into the lower end opening 5 a of the filter medium extraction pipe 5 to constitute the ejector 7.
[0013]
8 is a separator for separating the filter medium from the filter medium blown up by the ejector 7 and the wash water containing the SS component, and the wash water is discharged from here. The separated filter medium is returned and supplied to the filter layer 2 together with the raw water by the filter medium return pipe 9 provided in the raw water supply pipe 4 and circulates through the filter layer 2. The supplied raw water is filtered in the filtration layer 2 and is reduced from the treated water discharge pipe 10 provided in the treatment tank 1.
[0014]
Further, as Conventional Example 2, FIG. B10 is a sectional view of a lift type purification unit described in, for example, JP-A-6-304586.
In the figure, the solid line indicates the flow of raw water during filtration, and the alternate long and short dash line indicates the flow of cleaning water during cleaning. An intermediate portion of the filter tank 11 has a filter layer 12 filled with a filter medium, and the filter layer 12 is formed by being held by a partition plate 13. A flow path pipe 14 is provided in the upper part of the filtration tank 11.
[0015]
A guide tube 15 is erected above the partition plate 13 at a predetermined interval, and an ejector 17 is configured by the suction port 15 a and the water discharge port 16 a of the cleaning water supply pipe 16. The bottom of the filtration tank 11 is provided with the treated water outlet pipe 18 and the above-described cleaning water supply pipe 16 concentrically inside the treated water outlet pipe 18 with its discharge port 16a being spaced from the partition plate 13 at a predetermined interval.
[0016]
In the above configuration, as a filtering operation, raw water is supplied from the flow path pipe 14 to the filtration layer 12 and filtered, and then is reduced from the treated water discharge pipe 18.
Further, as the reverse cleaning operation, the cleaning water is supplied from the cleaning water supply pipe 16 and is jetted by the discharge port 16a, whereby the ejector 17 draws the filter medium from the suction port 15a to the guide tube 15 and discharges it from the discharge port 15b. Is done. The released filter medium is reduced to the filter layer 12 to circulate the filter layer 12. Moreover, the discharged wash water contains SS, and is discharged to the outside through the flow path pipe 14.
[0017]
Further, as Conventional Example 3, FIG. 11 is a sectional view of another lift type purification unit described in JP-A-6-304586.
In the figure, the solid line indicates the flow of raw water during filtration, and the alternate long and short dash line indicates the flow of cleaning water during reverse cleaning. Also, the same or corresponding parts as in FIG. Reference numeral 19 denotes a nozzle that performs an operation equivalent to the cleaning water supply pipe 16 of the previous example. Switching between supply of wash water and extraction of treated water is performed by a check valve (not shown) provided in the treated water discharge pipe 18.
[0018]
In the above configuration, at the time of filtration, raw water is supplied from the flow path pipe 14 to the filtration layer 12, filtered, and then reduced from the treated water discharge pipe 18.
Further, at the time of reverse cleaning, the cleaning water is supplied from the treated water discharge pipe 18 by switching the check valve, and the cleaning water is jetted by the nozzle 19 so that the filter medium is ejected from the suction port 15 a by the ejector 17. 15 is discharged from the discharge port 15b. The released filter medium is reduced to the filter layer 12 to circulate the filter layer 12. Moreover, the discharged wash water contains SS, and is discharged to the outside through the flow path pipe 14.
[0019]
[Problems to be solved by the invention]
Since the conventional purification apparatus is configured as described above, there are the following problems.
In Conventional Example 1, since the discharge port 5b of the filter medium extraction pipe 5 is provided at a position higher than the processing tank 1, the load on the weight is large, and since the filter medium extraction pipe 5 is L-shaped, the filter medium can be smoothly fed. Was not blown up and the filter medium was clogged. Furthermore, the separation device 8 is necessary to separate the extracted filter medium from the washing water containing the SS component, and there is a problem that the entire device is not compact.
[0020]
In the conventional examples 2 and 3, since the guide tube 15 is buried in the filter layer 12, the discharge port 15B of the guide tube 15 is filled when the filter medium is blown up, and the guide tube 15 is not blown up smoothly and is clogged. There was a problem. In addition, since no separation mechanism is provided for separating the filter medium extracted from the guide tube 15 from the cleaning water containing the SS component, the SS component is not sufficiently discharged, and the cleaning effect is insufficient. was there. Furthermore, although the filter medium in the vicinity of the guide cylinder 15 of the filtration layer 12 is easy to circulate, there is a problem that the filter medium in the vicinity of the outer periphery of the filter layer 12 is difficult to circulate and the filtration layer 12 cannot be washed evenly.
[0021]
The present invention has been made to solve the above-described problems, and can form the shape of a lift pipe, the shape of a nozzle, and an ejector through which a filter medium is smoothly blown, and discharge of SS without separately providing a separation device. It is an object to obtain a purification device for bathtubs that can sufficiently perform the above-described process, is excellent in compactness, and can evenly wash the filtration layer.
[0023]
The bathtub purification apparatus according to the present invention includes a filtration tank filled with a filter medium, a nozzle provided at the bottom of the filtration tank, having an opening with a predetermined diameter, and a predetermined diameter from the nozzle outlet. A lift pipe installed in the filtration tank having an interval and taking in the filter medium from the lower suction port and extracting it to the upper discharge port, and the filtered bath water provided at the bottom of the filtration tank to flow out of the filtration tank. A bath water circulation port to be provided, a first check valve provided at the bath water circulation port and opened only during purification, and a second check valve provided at the nozzle and opened only during reverse cleaning.The ejector is configured from the nozzle outlet to the inlet of the lift pipeIs.
[0024]
Also,It consists of a double tank structure of a filtration inner tank and a filtration outer tank, and the filtration inner tank filled with the filter medium is inserted into the filtration outer tank.A filtration tank, a nozzle provided at the bottom of the filtration tank, having an outlet opening in the upward direction and having a predetermined diameter, and standing in the filtration tank having a predetermined interval from the nozzle outlet, the filter medium being disposed below A lift pipe that is extracted from the suction port to the discharge port at the upper part of the intake, a filtration tank upper lid fitted to the upper part of the filtration outer tank, and a spacer provided on the inner surface of the filtration tank upper lid,An ejector is constructed from the nozzle outlet to the inlet of the lift pipe,A gap flow path having a space smaller than the filter medium is formed between the inner surface of the upper lid of the filtration tank and the upper edge of the inner filtration tank by the spacer.
[0025]
Further, a filtration tank filled with a filter medium, a nozzle provided at the bottom of the filtration tank, opening upward and having a predetermined diameter outlet, and in the filtration tank having a predetermined interval from the nozzle outlet A lift pipe that is erected and takes out the filter medium from the lower suction port to the upper discharge port,An ejector is constructed from the nozzle outlet to the inlet of the lift pipe,The suction port of the lift pipe is formed in a radial vortex shape.
Further, the nozzle and the bath water circulation port are connected to a single connection pipe through the first and second check valves, and the connection pipe bathes the bath water filtered in the filter tank. And the bath water pumped up from the bathtub is passed as washing water toward the filtration tank.
Furthermore, an airtight chamber is provided between the nozzle and the connecting pipe to maintain water pressure and prevent pressure reduction.
Further, it is further provided with a cushion member provided near the discharge port of the lift pipe to prevent crushing due to the collision of the filter medium with the upper lid..
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a block diagram of a purification apparatus for bathtubs showing an embodiment of the present invention, FIG. 2 is a sectional view of a filtration tank of the purification apparatus for bathtubs, and FIG. 3 is a flow path diagram of the filtration tank of the purification apparatus for bathtubs (A) shows the time of purification (filtration), and (b) shows the time of backwashing.
[0028]
In the figure, reference numeral 20 denotes a bathtub, which is provided with a water inlet 21 for sucking up bath water and a water outlet 22 for reducing bath water. 23 is a circulation path of bath water, a DC pump 24 which is a circulation power, three-way valves 25 and 26 for switching between circulation paths for filtration and back washing, a filtration tank (septic tank) 27 filled with a filter medium, and bath water A ceramic heater 28 for heating, an ozone generator 29 for sterilizing the bath water, a flow sensor 30 for detecting the circulating flow rate, a thermistor 31 for detecting the temperature of the bath water, and a drain port 32 for discharging sewage during backwashing are provided.
[0029]
33 is a cylindrical filtration outer tank having connecting pipes 34 and 35 connected to the circulation flow path 23, and 36 is a cylindrical filtration inner tank having a bath water circulation port 36a on the bottom surface. It is inserted in a concentric position of the tank 33 and installed so that the annular tank interval forms an annular flow path 37 through which bath water flows. Here, an O-ring 38 is disposed at a contact portion between the filtration outer tub 33 and the filtration inner tub 36, and an airtight chamber 39 is formed by engaging the O-ring 38 in both the tubs.
[0030]
Reference numeral 40 denotes a filter medium, which uses, for example, hard-molded granular activated carbon having a diameter of about 5 mm and a length of about 5 to 10 mm. The particle shape is uniform and the pressure loss in the filtration tank 27 is small. The filter medium 40 is filled in the filtration inner tub 36 and is held by a mortar-shaped holding plate 41 provided at the lower portion of the filtration inner tub 36 to form a filtration layer 42.
[0031]
Further, the flat partition plate 43 and the nozzle 44 are joined on the bottom surface of the filtration inner tank 36. The nozzle 44 has a diameter of the jet outlet 44a of about 7 to 8 mm, which is approximately ½ of the diameter of the connection pipe 35 to about 15 mm so that the performance of the DC pump 24, that is, the momentum of the jet flow becomes the largest with respect to the circulation flow rate. Narrow down to a moderate level. Further, a net 44b is provided at the ejection port 44a in order to prevent the filter medium 40 from being clogged.
[0032]
Reference numeral 45 denotes a filter that prevents the filter medium fine powder from flowing out into the bathtub. In the first embodiment, the filter 45 is provided on the upper surface of the flat partition plate 43, but may be provided on the upper surface of the mortar-shaped holding plate 41.
46 is a lift pipe having an appropriate diameter of about 25 to 30 mm, the lower suction port 46 a is kept at an appropriate distance of about 30 to 40 mm from the jet port 44 a of the nozzle 44, and the upper discharge port 46 b is the filter layer 42. It is joined and erected on the plurality of columns 41a so as to be positioned slightly above the surface. The lift pipe 46 and the nozzle 44 constitute an ejector 47.
[0033]
Further, the upper opening portion of the filtration outer tub 33 is sealed with a spherical dome-shaped upper lid 48. That is, the upper edge of the filtration outer tub 33 and the lower edge of the upper lid 48 have a screw structure, and an O-ring 49 is provided on the outer periphery of the lower edge of the upper lid 48, and the upper end 48 is rotated and attached to the filtration outer tub 33. As a result, the O-ring 49 is tightened and sealed. At this time, the inner filtration tank 36 is pressed downward to reinforce the air density at the O-ring 38.
[0034]
Further, the upper lid 48 is provided with a plurality of concentric spacers 48a. The spacers 48a abut against the upper edge of the filtration inner tub 36 and have a gap of about 2 to 3 mm to form a gap channel 48b. The gap channel 48 b separates the filter medium 40 discharged from the lift pipe 46 and the cleaning water containing SS, and discharges the cleaning water from the annular channel 37.
[0035]
Further, a sheet-like cushion 50 is provided in the vicinity of the upper discharge port 46 b of the lift pipe on the inner surface of the upper lid 48 to protect it from crushing due to the collision of the filter medium 40 with the upper lid 48.
Further, a check valve 51 that opens only at the time of reverse cleaning and a check valve 52 that opens only at the time of purification (filtration) are provided in the vicinity of the lower portion of the nozzle 44, and the circulation flow path is switched by opening and closing with water pressure.
[0036]
Next, the operation will be described.
First, the purification (filtration) operation will be described.
Bath water is pumped up from the water inlet 21 of the bathtub 20 by the DC pump 24, circulates in the three-way valve 25 in the AC direction, and flows into the filtration tank 27 from the connection pipe 34. The bath water that has flowed in flows through the annular flow path 37 and the gap flow path 48 b and is filtered by the filtration layer 42. The filtered bath water flows in the order of the holding plate 41, the filter 45, the flat partition plate 43, and the circulation port 36 a, opens the check valve 52 with water pressure, and flows out from the filtration tank 27 through the connection pipe 35.
[0037]
At this time, the check valve 51 is closed with water pressure to stop the flow to the nozzle 44 and to flow only to the circulation port 36a. The bath water that has flowed out circulates in the CB direction through the three-way valve 26, is heated and controlled by the ceramic heater 28, and is warmed to a set temperature. Thereafter, the temperature is detected by the thermistor 31, sterilized by ozone generated by the ozone generator 29, and returned from the water outlet 22 to the bathtub 20.
[0038]
Next, the reverse cleaning operation will be described.
The reverse cleaning operation is automatically performed in a timely manner, for example, once a day or by an interruption operation by a user.
The bath water pumped up by the DC pump 24 from the water inlet 21 of the bathtub 20 circulates in the AC direction through the three-way valve 26 as washing water, and flows into the filtration tank 27 from the connection pipe 35. The washing water that flows in applies water pressure to the airtight chamber 39, closes the check valve 52, and opens the check valve 51.
[0039]
Therefore, the washing water flows in a concentrated manner to the nozzle 44, generates a jet from the jet outlet 44a, and makes the ejector 47 have a negative pressure. Due to this negative pressure, the filter medium 40 and convective wash water are drawn from the suction port 46 a of the lift pipe 46 and blown up inside the lift pipe 46. The blown up filter medium 40 is reduced from the discharge port 46 to the surface of the filter layer 42.
[0040]
At this time, it is possible to generate a jet with the largest kinetic energy by gently narrowing the outlet 44a of the nozzle 44, for example, about 7 to 8 mm with respect to the circulating water flow rate by the DC pump 24. Moreover, by providing the airtight chamber 39, water pressure can be maintained, pressure reduction can be prevented, and a jet can be generated more greatly. Furthermore, by utilizing the characteristic that the jet flow from the nozzle 44 hardly diffuses, for example, about 40 mm, the suction port 46a of the lift pipe 46 is positioned, for example, about 30-40 mm from the jet port 44a of the nozzle 44, The suction efficiency of the ejector 47 can be maximized.
[0041]
Further, by setting the diameter of the lift pipe 46 to about 25 to 30 mm, for example, the water flow of the lift pipe 46 can be maintained, and the filter medium 40 does not mesh in the lift pipe 46. Furthermore, by positioning the discharge port 46b of the lift pipe 46 slightly above the surface of the filtration layer 42, when the filter medium 40 is discharged, the filter layer 42 itself is not clogged, and the water in the lift pipe 46 and the granular form are separated. The weight load of the filter medium 40 can also be suppressed small.
As described above, the state of drawing and blowing is most effectively performed, and the filtration layer 42 is sequentially circulated while maintaining this state.
[0042]
Furthermore, when viewed in detail, the separation of the SS component is performed mainly in the process of rubbing the filter media 40 by circulation, and the separation is performed in the process of blowing up in the lift pipe 46. Further, in the circulation of the filtration layer 42, the filtration tank 27 has a shape having no corners by the mortar-shaped holding plate 41 and the spherical dome-shaped upper lid 48. As a result, the convection momentum of the washing water is not easily taken to the corners, and the loss with respect to the circulating flow is reduced.
[0043]
Further, since the mortar-shaped filter 41 forms an inclination of about 45 degrees with respect to the bottom surface of the filtration inner tank 36, the filter medium 40 in the vicinity of the outer periphery of the filter layer 42 is also drawn into the ejector 47, and the filter medium 40 reaches the ejector 47 evenly. It becomes like this. The inclination angle of about 45 degrees of the holding plate 41 suppresses the loss of the capacity of the filtration layer 42 to a small extent and sufficiently secures the force of the filter medium 40 to the ejector 47.
[0044]
Further, when the cleaning water containing the SS component and the filter medium 40 reach the gap flow path 48b, the interval between the gap flow paths 48b is about 2 to 3 mm, so that the wash water flows but the filter medium 40 cannot pass. . Thereby, the filter medium 40 is reliably separated. At this time, since the washing water is quickly and radially discharged into the annular flow path 37, the SS component can be discharged uniformly and efficiently.
Thereafter, the washing water flows through the annular flow path 37 and flows out from the filtration tank 27 through the connection pipe 34. The washing water that has flowed out circulates in the CB direction through the three-way valve 26 and is discharged from the drain port 32 to the outside.
[0045]
In addition, the holding plate 41 provided in the circulation channel is clogged with hair or the like. As a result, the pressure loss increases, the bath water circulation rate decreases, and the amount of cleaning water supplied within a certain time also decreases. Here, the flow rate of the cleaning water may be detected by the flow sensor 30 that detects the flow rate of the apparatus, and the increase / decrease of the supply time of the cleaning water may be controlled based on the detected value.
[0046]
Embodiment 2. FIG.
FIG. 4 shows a purification apparatus for bathtubs according to another embodiment of the present invention, wherein (a) is a sectional view of a filtration tank of the purification apparatus for bathtubs, and (b) is a radial vortex viewed from the A direction of (a). It is a figure which shows a wing. In the figure, the description of the same or corresponding parts as those in the first embodiment is omitted. A plurality of radial spiral blades 53 are provided at the suction port 46 a of the lift pipe 46.
[0047]
Next, the operation will be described.
Since the purification (filtration) operation is the same as that of the first embodiment, the description thereof is omitted, and the same part is also omitted for the reverse cleaning operation, and different parts are described.
When the cleaning water flows into the nozzle 44 in a concentrated manner, a jet is generated, and the ejector 47 is brought to a negative pressure, the filter medium 40 and the cleaning water to be convected are drawn from the suction port 46 a of the lift pipe 46. At this time, the radial spiral wings 53 generate a vortex in the lift pipe 46, and thereby, the SS component can be released more effectively.
[0048]
Embodiment 3 FIG.
FIG. 5 is a cross-sectional view of a filtration tank of a purification apparatus for bathtubs showing another embodiment of the present invention. In the figure, the same or corresponding parts as those in Embodiment 1 are not described. Reference numeral 54 denotes a wide-diameter portion formed by smoothly and smoothly expanding the discharge port 46b of the lift pipe 46. A downward conical rectifier 55 is installed above the center of the wide diameter portion 54 and combined with the wide diameter portion 54. Along with the formation of the wide diameter portion 54, the cushion 50 is provided in an annular shape in the vicinity of the upper discharge port 46b of the lift pipe on the inner surface of the upper lid 48.
[0049]
Next, the operation will be described.
Since the purification (filtration) operation is the same as that of the first embodiment, the description thereof is omitted, and the same part is also omitted for the reverse cleaning operation, and different parts are described.
The washing water containing SS extracted from the lift pipe 46 is guided to the gap channel 48b by the wide diameter portion 54, thereby improving the discharge effect of SS and circulating the filtration layer 42 more smoothly. .
[0050]
【Example】
Next, evaluation according to the present invention is shown below.
In the purification apparatus for a bathtub using biological purification as in the present invention, the SS component deposited on the filter medium by backwashing can be sufficiently washed and discharged, and the number of bacteria in the activated carbon that is the filter medium is a value sufficient for purification. 10 in 1 g of activated carbon⁷  From 10⁶  It is desirable to hold in order of pieces. However, at the time of the above-described reverse cleaning operation, SS is cleaned and discharged, and bacteria are also thinned out, and the number thereof is reduced.
[0051]
In the reverse cleaning by the bathtub purification apparatus of the present invention, as a result of evaluating the permanganic acid consumption, SS content of the cleaning wastewater and the number of bacteria in the filter medium, the cleaning effect of the filter medium is sufficient, and also after the reverse cleaning Of 10⁶  It is known that the number of bacteria is not thinned below the order of one and always maintains a sufficient number of bacteria for purification.
Here, the evaluation contents will be described.
After about 50 people finished bathing in a large bathhouse, the bath purifier was operated to purify the bath water for about 7 hours, and then backwashing was performed for 2 minutes at a washing water supply rate of 5 to 6 liters / min.
Table 1 shows the properties after bathing.
[0052]
[Table 1]

[0053]
6 is a graph showing the transition of the number of bacteria in the activated carbon in the reverse cleaning, FIG. 7 is a graph showing the transition of the permanganate consumption of the cleaning waste water, and FIG. 8 is a graph showing the transition of the SS content of the cleaning waste water. 6, 7, and 8, sampling was performed before back washing, after 30 seconds washing, after 60 seconds washing, after 90 seconds washing, and after 120 seconds washing.
[0054]
Regarding the permanganate consumption in FIG. 7, the values for 90 seconds and 120 seconds for washing are almost the same as those before washing, and the values for 30 seconds and 60 seconds for washing are larger than the values before washing, especially 30 seconds. The value was remarkable.
The same was true for the SS content in FIG. Therefore, the higher the both permanganic acid consumption and SS content, the higher the cleaning effect. Therefore, the filter medium can be substantially cleaned with 5 to 6 liters of cleaning water supply for the initial 60 seconds. understood.
[0055]
However, for the number of bacteria in the activated carbon of FIG.⁷  Each is 30 seconds, 60 seconds, 90 seconds, 120 seconds and 10⁶  It was found that it was not less than the order of one piece, and it was not thinned out to less than a value sufficient for purification.
Therefore, it was found that the reverse cleaning mechanism of the present invention has a high cleaning ability of the filter medium with a small supply of cleaning water, and the number of degrading bacteria in the filter medium can always be maintained at a sufficient value.
[0057]
【The invention's effect】
As aboveThe filtration tank has a double tank structure consisting of an inner filtration tank and an outer filtration tank, the inner filtration tank filled with the filter medium is inserted into the outer filtration tank, and a bath is provided between the outer circumference of the filtration inner tank and the inner circumference of the filtration outer tank. By forming an annular flow path through which water flows, wash water from the filter layer is quickly and radially discharged from the annular flow path, and the SS component can be discharged evenly, and the bathtub has a reverse cleaning function with a large cleaning ability of the filter medium There is an effect that a purification device can be obtained.
[0058]
Furthermore, a gap channel having a space smaller than the filter medium is formed between the inner surface of the upper lid of the filtration tank and the upper edge of the filtration inner tank by the spacer, so that the cleaning including SS is performed without providing a separation device. There is an effect that water and the filter medium extracted by the lift pipe can be reliably separated, and a bathtub purifier excellent in compactness can be obtained.
[0059]
Also, by forming the suction port of the lift pipe in a radial vortex shape, when the cleaning water convection with the filter medium is drawn into the ejector, the vortex flow is generated in the lift pipe by the radial vortex suction port, thereby releasing the SS component. There exists an effect that the purification apparatus for bathtubs which can be performed more effectively is obtained.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a bathtub purification device showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a filtration tank of a bathtub purification apparatus showing an embodiment of the present invention.
FIG. 3 is a flow path diagram of a filtration tank of a purification apparatus for bathtubs showing an embodiment of the present invention.
FIG. 4 is a cross-sectional view of a filtration tank of a bathtub purification apparatus showing an embodiment of the present invention.
FIG. 5 is a cross-sectional view of a filtration tank of a bathtub purification apparatus showing an embodiment of the present invention.
FIG. 6 is a graph showing the transition of the number of bacteria in activated carbon in reverse cleaning by the bathtub purification apparatus of the present invention.
FIG. 7 is a graph showing the transition of permanganate consumption of washing wastewater by the bathtub purification apparatus of the present invention.
FIG. 8 is a diagram showing the transition of the SS content of cleaning wastewater by the bathtub purification device of the present invention.
FIG. 9 is a cross-sectional view of a conventional lift-type biological filtration device.
FIG. 10 is a cross-sectional view of a conventional lift type purification unit.
FIG. 11 is a cross-sectional view of a conventional lift type purification unit.
[Explanation of symbols]
27 Filtration tank, 33 Filtration outer tank, 36 Filtration inner tank, 37 Annular flow path, 40 Filter medium, 44 Nozzle, 44a Jet outlet, 46 Lift pipe, 46a Suction port, 46b discharge port, 47 Ejector, 48 Upper lid, 48a Spacer, 48b Gap channel, 53 Radial spiral blade, 54 Wide diameter part, 55 Rectifier

Claims (6)

In a purification apparatus for a bathtub having a purification function for filtering bath water in a bathtub and a reverse washing function for washing a filtration part, a filtration tank filled with a filter medium, and provided at the bottom of the filtration tank, open upward. A nozzle having a nozzle outlet of a predetermined diameter, a lift pipe standing in the filter tank having a predetermined interval from the nozzle outlet of the nozzle, and taking out a filter medium from a lower suction port to an upper discharge port; and the filter tank A bath water circulation port provided at the bottom of the filter for allowing filtered bath water to flow out of the filtration tank, a first check valve provided at the bath water circulation port and opened only during purification, and provided at the nozzle during backwashing And a second check valve that opens only , and an ejector is constructed from the nozzle outlet to the suction port of the lift pipe . A purification apparatus for a bathtub having a purification function for filtering bath water in a bathtub and a reverse washing function for washing a filtration portion , and comprising a double tank structure of a filtration inner tank and a filtration outer tank, and the filtration inside filled with the filter medium A filtration tank in which a tank is inserted into the filtration outer tank, a nozzle provided at the bottom of the filtration tank and opening upward and having a predetermined-diameter outlet, and the filtration tank having a predetermined interval from the nozzle outlet A lift pipe that is erected inside and takes out the filter medium from the lower suction port to the upper discharge port, a filtration tank upper cover fitted to the upper part of the filtration outer tank, and a spacer provided on the inner surface of the filtration tank upper cover And
An ejector is configured from the nozzle outlet to the suction port of the lift pipe, and the spacer has a space smaller than the filter medium between the inner surface of the upper lid of the filtration tank and the upper edge of the filtration inner tank. A purification apparatus for a bathtub, characterized in that a gap channel is formed. In a purification apparatus for a bathtub having a purification function for filtering bath water in a bathtub and a reverse washing function for washing a filtration part, a filtration tank filled with a filter medium, and provided at the bottom of the filtration tank, open upward. a nozzle having a spout having a predetermined diameter, is erected in the filtration tank having a predetermined distance from the ejection port of the nozzle, and a lifting tube withdrawing medium from the bottom of the suction port to capture the top of the outlet, wherein A bathtub purifying apparatus , wherein an ejector is formed from a nozzle outlet to an inlet of the lift pipe, and the inlet of the lift pipe is formed in a radial vortex. The nozzle and the bath water circulation port are connected to a single connection pipe through the first and second check valves, and the connection pipe directs the bath water filtered in the filter tank to the bathtub. The bath purifier according to claim 1, wherein bath water pumped up from the bathtub is passed as washing water toward the filtration tank. The purification apparatus for bathtubs according to claim 4, wherein an airtight chamber is provided between the nozzle and the connection pipe to maintain water pressure and prevent pressure reduction. The purification for a bathtub according to any one of claims 1 to 5, further comprising a cushion member provided in the vicinity of the discharge port of the lift pipe and preventing crushing due to the collision of the filter medium with the upper lid. apparatus.

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