JPH08192013A - Bathtub water purifying device - Google Patents

Abstract

PURPOSE: To dispense with the smaller output of a pump by lessening heat loss at the time of purification. CONSTITUTION: A main body 1 is installed in the corner part in a bathtub so that the entire part of the main body 1 submerges in the bathtub water. The main body 1 has a suction port 11 in its lower part and has a discharge port 80 in its upper part. The submersible pump 22 and purifying materials 25, 26 are built in the main body 1. An impeller 58 of the submersible pump 22 is fixed to an output shaft 51 of an electric motor 41 built in a waterproof case 38. The impeller 58 exists in a first water collecting chamber 1 formed by an impeller cover 36. There are two outflow ports 64 from the first water collecting chamber 61. As a result, the entire part of the main body 1 sinks in the bathtub water and, therefore, the heat of the main body 1 itself is retained and the heat loss during the time the bathtub water passes the inside of the main body 1 is lessened. Since the flow passage resistance is small, the feeding of a large volume of the water with the pump 22 of the small output is possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath water purifying apparatus for purifying bath water while circulating it.

[0002]

2. Description of the Related Art Conventionally, there is known a bath water purifying device for purifying bath water while circulating it, as described in, for example, Japanese Utility Model Laid-Open No. 63-69949. In the conventional bathtub water purifying apparatus, the main body except the suction port for sucking in the bathtub water and the discharge port for returning the purified water into the bathtub is installed outside the bathtub, for example, above the bathtub. The main body part contains a pump for circulating bath water and a purifying material.

However, in the above-mentioned conventional bath water purifying apparatus in which the main body is arranged outside the bath, there is a problem that the heat of the bath is large and the heat loss is large because the bath water comes into contact with the outside air. That is, the temperature of the bath water drops significantly while passing through the bath water purifying apparatus. Some bath water purifiers themselves have a heater, but heating with a heater increases fuel costs. Also, if the main body is placed outside the bathtub, the piping from the suction port to the purifying material and the pump to the discharge port becomes long, and the friction loss in this pipe becomes large, so a pump with a large output is required. However, it is disadvantageous in terms of device miniaturization and cost.

Further, particularly when the main body having a pump is arranged above the bathtub, the pumping distance of the pump becomes long, so that a pump having a large output is required.

Further, in the conventional bath water purifying apparatus, there is only one outlet from the pump. Therefore, the water pressure is concentrated at this one outlet, and as a result, a pump with a large output is required.

[0006]

As described above, in the conventional bath water purifying apparatus, since the main body is arranged outside the bath, the heat loss is large and the friction loss in the pipe is large. Therefore, there is a problem that a pump having a large output is required. Further, since there is only one outlet from the pump, there is a problem that a pump having a large output is required.

The present invention is intended to solve such problems, and an object of the present invention is to provide a small bath water purifying apparatus which has a small heat loss and can send a large amount of water with a pump having a small output. . Furthermore, it aims at providing the bath water purifying apparatus which can stir bath water evenly.

[0008]

In order to achieve the former object, the invention of claim 1 is provided with a box-shaped main body installed at a corner of a bathtub, and an intake port is provided on an outer surface of the main body. And a discharge port, a water passage communicating from the suction port to the discharge port is provided in the main body, and the submersible pump and the purifying material are provided in the water passage.

According to a second aspect of the present invention, in the bath water purifying apparatus according to the first aspect of the present invention, an inlet is provided at the bottom of the main body, an outlet is provided at the top of the main body, and a submersible pump is provided at the top of the main body. The purifying material is provided on the suction port side of the submersible pump in the main body.

According to a third aspect of the present invention, in the bath water purifying apparatus according to the first or second aspect of the invention, in order to achieve the latter object, the submersible pump includes a motor built in a waterproof case, and The first cover includes an impeller fixed to a rotation output shaft of a motor that projects upward in a watertight manner from a waterproof case, and a first cover that covers the impeller and forms a first water collecting chamber inside. In the position coaxial with the rotation center axis of the impeller in the upper surface part of the, while providing an inflow port leading to the suction port, the outflow port is provided in a plurality of places surrounding the inflow port in the upper surface part of the first cover, A second cover is provided above the first cover, the second cover having the second water collection chamber communicating with the outflow port therein, and the discharge port is provided on a side surface portion of the second cover. .

[0011]

In the bath water purifying apparatus of the first aspect of the present invention, the box-shaped main body is installed at a corner of the bath, and the entire main body is immersed in the bath water for use. Then, the bath water flows into the water passage in the main body from the suction port by driving the submersible pump in the main body,
After being purified through the purification material, it is recirculated into the bath from the discharge port. At this time, since the entire main body is submerged in the bath water, the main body itself is kept warm by the bath water, and therefore the heat loss while the bath water passes through the purifying device is small. Further, since the main body itself is arranged in the bathtub, the length of the water channel from the suction port to the discharge port can be shortened.

Further, in the bath water purifying apparatus of the present invention, the bath water flows from the suction port at the lower part of the main body by the drive of the submersible pump provided in the upper part of the main body, and first passes through the purifying material. , Then, it flows out from the discharge port on the upper part of the main body through the submersible pump. At this time, since the submersible pump is located in the upper part of the main body, it is located at a shallow depth below the water surface in the bathtub, and the pumping distance is short.

Further, in the bath water purifying apparatus of the third aspect of the present invention, in the submersible pump, the impeller for water supply is rotationally driven by the motor built in the waterproof case, but the first cover for covering the impeller is provided. Bath water flows into the first water collecting chamber from an inlet located coaxially with the rotation center axis of the impeller on the upper surface of the first cover. In addition, from the first water collecting chamber, bath water flows out to the second water collecting chamber above from the outlets at a plurality of positions surrounding the inflow port on the upper surface of the first cover, and Bath water flows out of the water collection chamber through the discharge port on the side surface. The discharge pressure is dispersed and averaged by the plurality of outlets and the second water collection chamber.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the bath water purifying apparatus of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a box-shaped main body, and the main body 1 is provided with a plastic main body case 2 having an opened lower surface and a plastic base cover 4 detachably attached to the lower surface of the main body case 2 with a screw 3. The shell is composed. To this base cover 4, three rubber legs 5 having the screws 3 are attached so as to project downward. The main body 1 has a substantially triangular prism shape, and is orthogonal to each other.
It has two side surfaces, and as shown in FIG. 2, these side surfaces can be installed at the corners in the bathtub A along two side surfaces in the bathtub A which are orthogonal to each other.

The base cover 4 has a lattice-shaped suction port 11
A pre-filter 12 which is a purifying material that covers the suction port 11 from below is detachably attached to the lower surface. The pre-filter 12 is a plastic filter frame 13 in which a sponge-like filter material 14 is detachably held, and the filter frame 13 has a lattice-shaped water passage having a direction orthogonal to the inlet 11. 15 are formed with openings. On the other hand, on the lower surface of the base cover 4, a pair of left and right guide rails 16 with the suction port 11 interposed therebetween.
The filter frame 13 is horizontally inserted between the guide rails 16 so that the pre-filter 12 can be attached. The lower surface of the pre-filter 12 attached to the base cover 4 is located higher than the lower surface of the leg 5, so that the pre-filter 12 can be attached and detached with the main body 1 left. There is.

A water passage 21 communicating with the suction port 11 is provided in the main body 1, and a submersible pump 22 is provided in a suspended state at an upper center portion of the water passage 21. Then, in the water passage 21, at the bottom of the main body case 2,
A coarse sponge-like first primary filter 23, which is a purifying material, and a fine sponge-like second primary filter 24, which is a purifying material, which is overlaid on the upper side thereof, are detachably fitted. There is. Further, in the main body case 2, between the primary filter 24 and the submersible pump 22 and the submersible pump 22.
A first purifying material 25 and a second purifying material 26 are removably filled on the outer peripheral side of each. These purification materials 25, 26
Is a net 27, 28 having water permeability, respectively, and granular porous adsorbents 29, 30 are packed therein. These porous adsorbents 29 and 30 decompose and adsorb impurities such as organic substances in water. As the porous adsorbents 29 and 30, natural stones such as barley stone or ceramics are used.
Further, particularly in the second purification material 26 on the outer peripheral side of the submersible pump 22, silver ions or copper ions are added to the porous adsorbent material 30 to have an antibacterial action. Although an antifungal agent or the like is also used for antibacterial, it is advantageous to use a metal in terms of the continuity of the effect.

In the submersible pump 22, a plastic impeller cover 36 which is a first cover and whose lower surface is opened is fixed to the lower side of the upper surface of the main body case 2 by a screw 37. The upper part of a plastic waterproof case 38 is fitted and fixed to the lower part inside the impeller cover 36. This waterproof case 38 is an upper case member whose bottom surface is opened.
39 and a lower cover 40 that is watertightly fixed to the lower surface of the upper case member 39 by adhesion or the like, and incorporates an electric motor 41 with an output of about 12 W. This electric motor 41 has an upper case member 39 by means of a screw 43 at a central flange portion 42 thereof.
It is fixed to. Further, the lower cover 40 is formed with a taper-shaped cord through hole 44 that becomes thinner toward the upper side. A tapered wedge portion 46 at the tip of the rubber bushing 45 having elasticity is taper-fitted to the cord passage hole 44. The inside of the bushing 45 is used for power supply to the electric motor 41. The waterproof cord 47 is running. Further, a bushing holder 48 is provided with a screw 49 on the lower surface of the lower cover 40.
The bushing retainer 48 pushes the wedge portion 46 of the bushing 45 upward so that the wedge portion
46 is in close contact with the peripheral surface of the cord passage hole 44 and the cord 47.
As a result, the watertightness of the cord passage hole 44 is reliably ensured.

The rotation output shaft 51 of the electric motor 41 is fitted in a watertight manner on the upper surface of the waterproof case 38 and protrudes upward, but in order to reliably prevent water from entering the electric motor 41,
An oil seal 52 is provided around the rotation output shaft 51 in the waterproof case 38. On the other hand, outside the waterproof case 38, a mechanical seal 53 is provided around the rotation output shaft 51. The mechanical seal 53 includes a fixed ring 54 made of ceramics or the like that is watertightly fixed on the waterproof case 38, and a rotary ring 55 made of metal or the like that is fixed to the rotary output shaft 51 and slidably abuts on the fixed ring 54. Is equipped with. The rotating ring 55 is pushed downward by the spring 56 and is in close contact with the fixed ring 54. Further, the upper portion of the rotary ring 55 is made of rubber, and is watertightly attached to the rotary output shaft 51 by a spring 57. In this way, the watertightness of the penetrating portion of the rotation output shaft 51 in the waterproof case 38 is maintained. An impeller 58, which is a centrifugal fan, is fixed to the upper end of the rotary output shaft 51.

The impeller cover 36 covers the impeller 58 and forms a first water collecting chamber 61 therein. Further, the impeller cover 36 has a blind-shaped straightening wall on the outer peripheral surface of the upper surface.
Although 62 is formed so as to project upward, a small gap is held between the flow straightening wall 62 and the upper surface of the main body case 2.
An inflow port 63 is formed in the center of the upper surface of the impeller cover 36 so as to be coaxial with the rotary output shaft 51. Then, the portion on the outer peripheral side of the submersible pump 22 in the water passage 21 is the first via the flow regulating wall 62 and the inflow port 63.
Leading to the water collection room 61. Further, a pair of cylindrical outlets 64 are formed on the upper surface of the impeller cover 36 so as to sandwich the inlet 63 and project upward.

Further, a current plate 66 is fixed to the upper part of the impeller cover 36. The straightening vane 66 is fitted in the impeller cover 36 and divides the first water collecting chamber 61 into upper and lower parts, but the impeller 58 is formed in the opening 67 formed in the central portion of the straightening vane 66. positioned. An annular guide wall 68 is formed on the upper surface of the current plate 66 so as to project, and the upper edge of the guide wall 68 is in contact with the upper surface of the main body case 2. The guide wall 68 has a pair of spiral portions 69 having a shape that smoothly guides the bath water from the opening 67 to both the outlets 64. Further, the inclined portion 70 is provided at the tip of these spiral portions 69.
Are formed.

A pair of cylindrical portions 71 are formed on the upper surface of the main body case 2 so as to project downward, and these cylindrical portions 71 are fitted into both outlets 64 of the impeller cover 36, respectively. There is. A rubber O-ring 72 fitted to the outer peripheral side of the outlet 64 is watertightly sandwiched between the upper surface of the impeller cover 36 and the lower end of the cylindrical portion 71.

Further, on the upper side of the main body case 2, there is a second
An upper lid 76 made of plastic, which is a cover of, is fixed by screws 77. The lower end of the annular partition wall 78 formed on the lower surface of the upper lid 76 hits the upper surface of the main body case 2,
A second water collection chamber 79 is formed inside the partition wall 78. Then, both outlets 64 of the impeller cover 36 communicate with the second water collecting chamber 79. Further, a cutout-shaped discharge port 80 is formed on the lower side of one side surface portion of the partition wall 78. In addition, the protrusion 81 formed on the upper surface of the main body case 2 is fitted to the lower inner peripheral side of the partition wall 78.

Further, a taper-shaped cord passage hole 86 is formed on the upper surface of the main body case 2 so as to be tapered downward. The cord through hole 86 has a tapered wedge portion at the tip of the rubber bushing 87 having elasticity.
Although 88 is taper fitted, the waterproof cord 47 passes through the inside of the bushing 87. Further, a bushing holder 89 is fixed to the upper surface of the main body case 2 with a screw 90, and the bushing holder 89 is a wedge portion of the bushing 87.
By pushing 88 upwards, this wedge 88 will be
It is in close contact with the peripheral surface of the cord and the cord 47. In this way, watertightness is maintained in the same manner as the cord through hole 44 of the waterproof case 38.

The cord 47 is connected to a power supply device (not shown) installed outside the bathroom. This power supply device supplies power to the electric motor 41, and the electric power of the electric motor 41 is an alternating current of 24V. This 24V AC is obtained from a 100V commercial AC power supply using an isolation transformer. In this way, the electric motor 41 side
It is completely insulated from the 100V power source by an insulation transformer, ensuring safety. In addition, there is a protective device such as an earth leakage breaker that shuts off the power when overcurrent or overheat occurs.

Next, the operation of the above configuration will be described. The bathtub water purifying device is effectively used in a bathtub that can be cooked further. Then, as shown in FIG. 2, the main body 1 is placed at a corner of the bathtub A. When pouring water, the water surface B in the bathtub A is made higher than the upper surface of the main body 1. That is, the entire main body 1 is used by being submerged in the bath water.

In each drawing, the flow of bath water during use is indicated by an arrow. In the submersible pump 22, the impeller 58 rotates at a rotation speed of, for example, about 3000 revolutions per minute due to the drive of the electric motor 41. This causes the bath water to pass through the prefilter 12 from the suction port 11 into the main body 1. It flows into the waterway 21. In the pre-filter 12, relatively large dust particles such as hair are first captured. Then, the bath water passes through the primary filters 23 and 24 and the purifying materials 25 and 26 in the water passage 21 in order. Dust and debris is captured by the primary filters 23 and 24, and the slime and dirt of bath water and other organic substances are decomposed and adsorbed by bacteria by the purification materials 25 and 26. Chlorine contained in tap water is also adsorbed. In addition to that, in the purification material 26 containing silver ions, various bacteria are decomposed and an antibacterial effect is obtained. In this way, the bath water is purified and clean water is obtained. Furthermore, when natural stones are used for the purification materials 35 and 36, many minerals are dissolved from the natural stones, and a hot spring-like effect is also obtained. After passing through the purifying materials 25 and 26, the bathtub water flows into the first water collecting chamber 61 having the impeller 58 through the flow regulating wall 62 and the inflow port 63. Then, the bath water is guided by the guide wall 68 of the straightening vane 66 in the first water collecting chamber 61.
Is smoothly guided to the both outlets 64, flows into the second water collecting chamber 79 from here, and is then recirculated into the bathtub A through the discharge port 80. In this way, the bath water becomes
It circulates in and out and is purified.

Here, the flow of bath water after the first water collecting chamber 61 will be described in more detail. The bathtub water is directed to the outer peripheral side by the centrifugal force of the impeller 58. At this time,
The two spiral portions 69 of the guide wall 68 of the straightening vane 66 smoothly flow around the half-circle to the both outlets 64. Moreover, since the tip end in the spiral portion 69 is inclined by the inclined portion 70, the bath water smoothly rises to each outflow port 64. As a result, the discharge pressure is dispersed. The bathtub water is first collected from both outlets 64 into the second water collecting chamber 79 and then flows out from the discharge port 80 on the side surface thereof, but the second water collecting chamber 79 is present. Causes the pressure to be averaged.

By the way, the pre-filter 12 which is apt to be clogged with hair or the like should be washed frequently, for example, every day. However, the pre-filter 12 can be easily put on and taken off while the main body 1 is kept in the bath A, and easily washed. it can. In addition, sometimes, for example, about once every three months, the primary filters 23, 24
The purifying materials 25, 26 should also be washed, but at this time, the base cover 4 is removed from the main body case 2, and the primary filters 23, 24 and the purifying materials 25, 26 are opened through the lower surface opening of the main body case 2. Put on and take off. The purification materials 25 and 26 use granular porous adsorbents 29 and 30, respectively.
Since 29 and 30 are put in the nets 27 and 28, they can be easily washed. Then, the purification materials 25 and 26 using the porous adsorbent materials 29 and 30 made of ceramics or natural stone can be repeatedly and semipermanently used by washing. Activated carbon is also used as a purification material, but in the case of activated carbon, the purification action is effective, but it needs to be replaced.

According to the construction of the above-mentioned embodiment, by purifying the bath water to keep it fresh, it is possible to take a comfortable bath, and there is no need to clean the bath, and the bath water can be reused without being discarded. However, since it can be used repeatedly, it can save a lot of water.

Further, since the purifying device is not provided with a heater for heating and the additional heating is performed when necessary, the fuel cost does not increase. Also, when the bath is heated, the fuel cost can be saved because it is not necessary to use tap water whose temperature is lower than the ambient temperature, but to boil water having a low ambient temperature.

Further, the main body 1 itself is formed by using the main body case 2 and the submersible pump 22 to form the water passage 21 in the main body 1 without using pipes and by arranging each part in the main body 1. In addition, since the main body 1 is installed at the corner of the bathtub A, it is possible to keep the bathroom small, and there is no discomfort with that before installation. In addition, for installation, it is only necessary to put the main body 1 in the bathtub A, put the cord 47 out of the bathroom, and connect the power supply device to the existing outlet, so no special work is required, and the installation is easy. Is.

Since the entire main body 1 is used by being submerged in the bath water, the main body 1 itself is kept warm by the bath water, and therefore the heat loss while the bath water passes through the purifying device can be reduced. Therefore, it is not necessary to cool the bath water, and there is no problem even if the purification device does not have a heater as described above.

At the same time, since the main body 1 itself is arranged in the bathtub A and the bathwater circulates only in the bathtub A, the length of the water channel from the suction port 11 to the discharge port 80 can be shortened. Therefore, since the flow path resistance is reduced, a large amount of water can be sent by the pump 22 having a small output. As a result, the pump 22 can be downsized, and the entire device can be downsized. Further, the manufacturing cost can be reduced, and the electric energy can be reduced in use, and the maintenance cost can be reduced.

A waterproof structure is required to use the entire main body 1 by submerging it in the bath water, but the main body 1 is required to be waterproof because the power supply device is arranged outside. Only the electric motor 41 of the pump 22. The electric motor 41 is built in the waterproof case 38, and the cord through hole 44 of the waterproof case 38 has a rubber bushing 45.
Since the watertightness is maintained by the bushing holder 48 and the insertion portion of the rotary output shaft 51 in the waterproof case 38 is kept watertight by the mechanical seal 53 and the oil seal 52, the waterproofness of the electric motor 41 is ensured. Can hold

Further, since the submersible pump 22 is suspended in the upper part of the main body 1, it is located at a shallow position within a few cm below the water surface in the bath A, so that the pumping distance (pumping height) is short. Therefore, a large amount of water can be pumped with a small force, and the pump
The output of 22 is even smaller.

Further, in the upper surface of the impeller cover 36 in which the first water collecting chamber 61 is formed, an inflow port 63 is formed in the central part thereof, and outflow ports 64 are provided at two places sandwiching this inflow port 63. Since the discharge pressure is provided, the discharge pressure is divided into two, so that the water can be discharged efficiently and the output of the pump 22 can be further reduced. Moreover, since the rectifying plate 66 provided in the impeller cover 36 allows the bath water to smoothly flow toward the outlet 64 only about half around the impeller 58, the internal water pressure can be more effectively dispersed. . In addition to that, the second water collecting chamber 79 is further provided above the outlet 64, and the discharge port 80 is provided on the side surface portion thereof, so that the first water collecting chamber is provided.
The bath water can be discharged into the bath A after the eccentric pressure is averaged in the bath 61 by the centrifugal force, and the bath water can be evenly stirred.

Further, since the purifying material 26 to which silver ions or copper ions are added is arranged in the water passage 21 in the main body 1 not on the lower side of the submersible pump 22 but on the narrower outer peripheral side, the amount thereof is small. .

Further, the present bathtub water purifying apparatus has a simple structure as a whole, so that it can be manufactured at a low cost and there are few failures. Easy maintenance, filters 12, 23, 24 and purification material 2
The user can easily clean 5, 26, etc.

The present invention is not limited to the above embodiment, and various modifications can be made. For example,
In the above embodiment, the number of the outlets 64 from the first water collecting chamber 61 to the second water collecting chamber 79 is two, but three or more outlets may be provided. However, if the number of outlets is large, manufacturing becomes difficult,
Even with two as in the above embodiment, there are sufficient effects. Also,
The waterproof cord insertion portion of the main body case does not require strict water tightness, and thus may be a simple socket.
Besides, the detailed configuration, the output of the submersible pump, the rotational speed of the impeller, etc. are not limited to those in the above-described embodiment.

[0040]

According to the first aspect of the present invention, the box-shaped main body having the suction port and the discharge port on the outer surface portion and having the submersible pump and the purifying material built therein is installed at the corner of the bath, and the whole main body is provided. Since the bath is submerged in the bath water, the body itself is kept warm by the bath water, so that the heat loss while the bath water passes through the purifying device can be reduced. Further, since the length of the water channel from the suction port to the discharge port can be shortened, a large amount of water can be sent by a pump with a small output, and therefore the entire device can be downsized and the manufacturing and use costs can be reduced.

Further, according to the invention of claim 2, the suction port is provided in the lower part of the main body, the discharge port is provided in the upper part of the main body, the submersible pump is provided in the upper part of the main body, and the submersible pump is provided in the main body more than the submersible pump. Since the purifying material is provided on the suction port side, the pumping distance of the submersible pump can be shortened, and therefore the pump output can be further reduced.

According to the third aspect of the invention, the upper surface of the first cover, which covers the impeller of the submersible pump and forms the first water collecting chamber therein, is coaxial with the central axis of rotation of the impeller. Since the inflow port is provided at the position and the outflow ports are provided at a plurality of places surrounding this inflow port, the discharge pressure is dispersed, and therefore efficient water discharge is possible and the output of the pump is even smaller. . Along with this, a second water collection chamber is further provided above the outflow port, and a discharge port is provided on the side surface portion thereof, so that the eccentric pressure is averaged by the centrifugal force of the impeller, and then the bath water is bathed. It can be refluxed in and the bath water can be stirred on average.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a bath water purifying apparatus of the present invention.

FIG. 2 is a perspective view showing a usage state of the same.

FIG. 3 is a plan view excluding the upper lid.

FIG. 4 is a perspective view of the same impeller and a current plate.

[Explanation of symbols]

 A Bathtub 1 Main body 11 Inlet port 12 Pre-filter (purification material) 21 Water passage 22 Submersible pump 23 First primary filter (purification material) 24 Second primary filter (purification material) 25 First purification material 26 Purification material for 2 36 Impeller cover (1st cover) 38 Waterproof case 41 Electric motor (motor) 51 Rotating output shaft 58 Impeller 61 1st water collecting chamber 63 Inlet 64 Outlet 76 Upper lid (2nd cover) 79 Second water collection chamber 80 outlet

Claims (3)

[Claims] 1. A box-shaped main body installed at a corner of a bathtub, and an intake port and a discharge port provided on an outer surface of the main body,
A bath water purifying apparatus characterized in that a water passage communicating from an intake port to a discharge port is provided in the main body, and an underwater pump and a purifying material are provided in the water passage. 2. A suction port is provided in the lower part of the main body, a discharge port is provided in the upper part of the main body, a submersible pump is provided in the upper part of the main body, and a purification material is provided in the main body closer to the suction port than the submersible pump. The bath water purifying apparatus according to claim 1, wherein 3. The submersible pump includes a motor built in a waterproof case, an impeller fixed to a rotation output shaft of the motor projecting upward in a watertight manner from the waterproof case, and a first impeller internally covering the impeller. And a first cover forming a water collecting chamber of the first cover, and an inlet port communicating with the suction port is provided at a position coaxial with a rotation center axis of the impeller on an upper surface of the first cover. A first cover is provided with outlets at a plurality of positions surrounding the inlet, and a second cover is formed above the first cover to internally form a second water collecting chamber communicating with the outlet. The bath water purifying apparatus according to claim 1 or 2, wherein the discharge port is provided on a side surface portion of the second cover.