JPH11347318A - Bath water circulation and filtration apparatus comprising chemical agent-adding apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bath water circulation and filtration apparatus capable of precisely adding a chemical agent having disinfection efficacy for suppressing microorganism propagation in a indirect manner. SOLUTION: This bath water circulation and filtration apparatus comprises a chemical agent tank 21 for storing a liquid state chemical agent, a liquid level regulating apparatus 24 for keeping the liquid surface of the chemical agent at a prescribed level, a float 23 inserted under the liquid surface kept at the prescribed level by the liquid level regulating apparatus 24 for making the chemical agent overflowing the apparatus 24, and a driving part 22 for inserting the float 23 under the liquid surface for making a prescribed amount of the chemical agent overflowing the apparatus 24 and supplying the agent to a circulation route of the bath water circulation and filtration apparatus itself, so that a prescribed amount of the chemical agent can be added corresponding to the operation of the driving part 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath water circulating and filtering apparatus for circulating bath water and purifying the bath water using a purifying material.

[0002]

2. Description of the Related Art FIG. 7 shows the overall structure of a conventional bath water circulation filtration device. In the figure, 9 is a bathtub. The bathtub 9 has a suction port 7 for sucking up bath water and a water discharge port 8 for reducing bath water. A pre-filter for preventing inflow of dust such as hair is attached to the suction port 7 (not shown).
The circulation drive unit 1 is disposed outside the bathtub 9, and the inside and outside of the bathtub 9 are communicated with each other by pipes 11a to 11e. In the circulation path of the bath water, there are provided a pump 4 which is a circulating power, a purification tank 2 filled with a purification material 10, a heater 6 for heating the bath water, and a flow sensor 5 for detecting a circulation flow rate. Reference numeral 3 denotes a control unit containing electric parts for controlling the drive unit 1 and the like.

The purifying tank 2 is filled with a purifying material 10 such as activated carbon, barley stone, ceramic balls or porous ceramics, and bio (microorganisms) are adhered to the surface of the purifying material. Is formed, so that the dirt of the bath water is adsorbed and purified by decomposition. In the septic tank 2, various wastes such as dead bodies of bio (microorganisms) are accumulated in the septic tank 2 over a long period of time, so that the purification capacity does not decrease.
Periodically, the switching valves 12 and 13 in the inlet-side flow path and the outflow-side flow path of the septic tank are operated to flow the circulation flow in the opposite direction (the direction opposite to the arrow), and the purification material 10 is loosely stirred. The so-called backwashing method has been adopted in which the waste is removed, the valve 14 in the flow path from the septic tank to the drain is opened, and the valve 14 is discharged from the drain to the outside of the bathtub.

[0004] The flow sensor 5 detects when the flow rate is reduced due to dust clogging or the like of each part including the pre-filter, and issues a warning. The heater 6 functions to heat the bath water and keep the temperature of the hot water at a desired set temperature.
The air is compressed by the air pump 15 and mixed with the bath water from the water discharge port 8 by the air hose 16 so that the air can be enjoyed as a bubble bath.

[0005]

The conventional bath water circulating and filtering apparatus is constructed as described above, and carries out permanent purification while adhering bio (microorganisms) to the purification material of the purification tank and performing regular maintenance of the purification tank 2. It was intended to be. However, if you use it for a long time without changing the bath water, bacteria brought in by the person at the time of bathing will grow in the bath water,
Bacteria adhere to all places in the circulation flow path from the suction port for sucking bath water other than the septic tank 2 to the water discharge port for reducing bath water, and further grow and flow into the bath water. There is a problem that a large amount of bacteria come to exist. Therefore, in order to suppress the growth of bacteria, it is necessary for a person to periodically input a drug having a disinfecting effect, which is very troublesome for the user and dangerous because the drug is touched at the time of input.

The bath water circulation filtration device of the present invention has been made in order to solve the above-mentioned problems, and a drug having a disinfecting effect is accurately introduced by indirect operation in order to suppress the growth of bacteria. It is an object of the present invention to provide a bath water circulating filtration device that can be used.

[0007]

According to the first aspect of the present invention, there is provided a bath water circulation / filtration apparatus having a medicine feeding device, wherein a liquid level maintaining means for maintaining the liquid level of the liquid contributing to the feeding of the drug at a predetermined level, and a driving unit. And a displacement means for changing a liquid level maintained by the liquid level maintaining means in accordance with the operation of the liquid level maintaining means. A predetermined amount of a drug is supplied to the circulation path of the water circulation filtration device and supplied.

According to a second aspect of the present invention, there is provided a bath water circulation / filtration apparatus having a medicine introduction device, a medicine tank for containing and accommodating a liquid medicine, a liquid level maintaining means for maintaining the liquid level of the medicine at a predetermined level, A float inserted below the liquid surface of the medicine maintained at a predetermined level by the liquid surface maintaining means and overflowing the medicine, and a float inserted under the liquid surface of the medicine to overflow a predetermined amount of the medicine to form a bath. And a drive unit for supplying the water to the circulation path of the water circulation filtration device, and a predetermined amount of medicine is supplied in accordance with the operation of the drive unit.

In a bath water circulation / filtration apparatus having a drug input device according to a third aspect of the present invention, a diluting tank for receiving the drug input in response to the operation of the driving section and reducing the concentration thereof is provided. is there.

In the bath water circulation / filtration apparatus having the drug supply device according to the fourth invention, a dissolution tank for dissolving a solid drug and a first for supplying a liquid to the dissolution tank when the drug is supplied. A valve, an input means for inputting a predetermined amount of a solid drug into the dissolving tank, and supplying the drug dissolved in the dissolving tank to a circulation path of bath water, and after supplying the dissolved drug, the dissolving tank. And a second valve for emptying.

[0011] In the bath water circulation / filtration apparatus having the medicine input device according to the fifth invention, an inlet port for sucking bath water from the bathtub;
A pump for circulating the bath water from the suction port,
A purifying tank for purifying bath water circulated by the pump, an air supply mechanism for putting air into the bath water, a medicine tank containing a liquid medicine, and a tank for keeping the liquid level of the medicine at a predetermined level. Liquid level maintaining means, and the air is supplied from the air supply mechanism to the liquid level of the drug maintained at a predetermined level by the liquid level maintaining means to overflow the drug, so that the liquid overflows in the circulation path of the bath water circulation filtration device. A predetermined amount of medicine is injected.

[0012] In the bath water circulating filtration device having the chemical injection device according to the sixth invention, a chlorine agent having a disinfecting effect is injected a predetermined time before the bathing time zone.

[0013] In the bath water circulating and filtering apparatus having the chemical injecting device according to the seventh invention, after a chlorine agent having a disinfecting effect is introduced,
The backwash is performed within a predetermined time.

[0014] In the bath water circulation / filtration apparatus having the medicine charging apparatus according to the eighth invention, a suction port for sucking bath water from the bathtub;
A pump for circulating the bath water from the suction port,
A purifying tank for purifying bath water circulated by the pump, wherein the bath water from the purifying tank is discharged from the water discharge port to the bath tub via the heater through the heater. A medicine having a sterilizing effect is introduced into the bath water between the pump and the suction port in the circulation flow path.

In a circulating water filtering apparatus having a chemical input device according to a ninth aspect of the present invention, in the eighth aspect of the present invention, there is provided a switching means capable of selecting a path passing through the septic tank and a path passing through the septic tank.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Embodiment 1 of the present invention will be described with reference to FIG. FIG. 1 is a diagram showing an entire configuration diagram of a bath water circulation filtration device of the present invention. In the figure, 1 is a circulation drive unit, 2 is a purification tank, 3 is a control unit, 4 is a pump, 5 is a flow rate sensor, and 6 is a heater. Reference numeral 7 denotes a suction port, 8 denotes a water discharge port, 9 denotes a bathtub, 10 denotes a purifying material, and 11 denotes a pipe formed by pipes 11a to 11e to form a circulation channel. 19 is an automatic medicine injection device, 20 is a switching valve, 14 is a valve, and 17 and 18 are three-way valves. In the figure, FIG.
Portions with the same reference numerals have the same functions.

The purifying tank 2 is filled with a purifying material 10 such as activated carbon, barley stone, ceramic balls, or porous ceramics, and bio (microorganisms) are adhered to the surface of the purifying material. By forming a film, the dirt of the bath water is adsorbed and purified by decomposition.

In the septic tank 2, various dirt such as dead bodies of bio (microorganisms) are accumulated by long-term use.
As a general method, the switching valves in the inlet and outlet channels of the septic tank are operated periodically to reverse the circulation flow (in the direction opposite to the arrow) so that the purification capacity does not drop.
So that the purifying material 10 is freely stirred to remove dirt, the valve 14 in the flow path from the septic tank to the drain is opened, and the drain is drained out of the bathtub, so-called reverse washing. Was taken.

The flow rate sensor 5 detects when the flow rate has decreased due to dust clogging or the like in each part including the pre-filter, and issues a warning. The heater 6 functions to heat the bath water and keep the temperature of the hot water at a desired set temperature.
The air is compressed by the air pump 15 and is discharged from the water outlet 8 while mixing the air with the bath water by the air hose 16, so that it can be enjoyed as a bubble bath. The automatic medicine injection device 19
Is the piping 1 upstream (suction side) from the pump 4
1a.

The three-way valves 17 and 18 are configured as electric drive valves that are operated by the operation of the control unit 3, and form a flow for directly connecting the pipe 11b and the pipe 11c and a flow for bypassing the septic tank 2, and have a conventional structure. For the cleaning of the septic tank 2 being performed, it is also possible to obtain a flow path for performing reverse cleaning.

In this configuration, the bath water sucked from the suction port 7 rises up the pipe 11a, passes through the pump 4, passes through the purification tank 2, the flow rate sensor 5, and the heater 6 as in the prior art, and flows from the water discharge port 8 to the bath tank 9 as in the prior art. In the flow to be reduced to the above, the medicine having a disinfecting effect obtained by the automatic dispensing device 19 is injected and mixed into the bath water between the pump 4 and the suction port 7, so that the disinfecting effect makes the circulation path Bacteria can be prevented from adhering to almost all areas except the pipe 11a, and the growth can be suppressed. Here, the inside of the pipe 11a can be easily cleaned by making the pipe 11a connecting the drive unit 1 and the inside of the bathtub 9 detachable at, for example, a connection point of the switching valve 20 forming a connection part. .

FIG. 2 is a diagram showing the details of the embodiment of the automatic medicine injection device. In FIG. 2, 11a
Is a pipe constituting a part of the pipe line 11 shown in FIG.
a and 20b are valves, 21 is a medicine tank, 22 is a drive unit, 2
3 is a float, 24 is a constant water leveler, 25 is a dilution tank, and 26 is a chemical pipe.

The liquid tank is filled with the liquid medicine from the medicine tank 21 for storing and holding the liquid medicine. The constant water level unit 24 constitutes a liquid level maintaining means for maintaining a constant level of the liquid medicine, that is, a predetermined liquid level.

There is an inlet of a medicine pipe 26 for introducing the liquid medicine at a position slightly higher than the constant water level of the liquid medicine in the leveling unit 24, and the rotation of the motor is moved up and down using a gear. The float 23 is moved up and down by the drive unit 22 which can move the liquid medicine into the liquid medicine of the constant level unit 24 for keeping the liquid surface of the liquid medicine constant, thereby bringing the water surface of the liquid medicine into the medicine pipe 26. Is raised by a predetermined value from the inlet of the container and overflows, and the liquid drug is dropped into the dilution tank 25 through the drug pipe 26. The float 23 is provided with a constant water level unit 24 which constitutes a liquid level maintaining unit by the operation of the driving unit 22.
And a displacement means for changing the liquid level of the liquid medicine maintained by the method by a predetermined value.

The liquid drug dropped into the dilution tank 25 is diluted by mixing with the bath water stored in the dilution tank 25. By operating the valves 20a and 20b, the bath water is guided to the dissolution tank, the diluted medicine is injected and mixed into the bath water, and the medicine is mixed in a state where the concentration of the medicine is somewhat low. Flow bath 9
to go into.

FIG. 3 is a graph showing a change in the residual chlorine concentration when 0.5 g of a chlorine agent, which is a chemical having a disinfecting effect, is charged into a bathtub. Chlorine concentration is 0.4ppm in 30 minutes
Maintaining the front and back, it is less than 0.2 ppm in 60 minutes and almost 0 ppm in 120 minutes. In the bath water circulating filtration device, by setting the bathing time in advance, the chlorine agent is added at least one hour before the bathing time. In the above-mentioned bath water circulation filtration device, back washing is performed about 30 minutes after the chlorine agent is charged.

In the bath water circulation / filtration apparatus having the medicine charging device according to the first embodiment, a medicine tank for holding and holding a liquid medicine, a constant water leveler for keeping the water level of the medicine constant, and the constant water leveler A float for overflowing the medicine in the container, and a drive unit for submerging the float in the medicine in the constant level unit, without contacting the liquid medicine directly with the drive unit, a fixed amount of liquid In this method, a certain amount of the medicine is mixed and injected into the bath water without touching the driving unit 22 by using the float 23 shown in FIG. According to the automatic medicine injection device according to the first embodiment, since the medicine does not touch the drive unit 22, the drive unit 22 is not affected by corrosive chemicals and the like, and an inexpensive and long-life device is provided. Can be.

Further, a high-concentration drug is diluted to some extent in the dissolving tank 25 shown in FIG. 2 before injection and mixing.
As a result, the concentration of the drug is reduced, so that the high-concentration drug does not come into contact with the component, and the components are not attacked by corrosive agents or the like, so that an inexpensive and long-life device can be provided.

Further, a chemical having a disinfecting effect is injected and mixed into the pipe 11a constituting the pipe 11 shown in FIG.
At least a part of the pipe line 11 composed of 1a to 11e passes a bath water into which a medicine having a disinfecting effect is injected and mixed. Thereby, bacteria adhere to the inner surface of the pipe line 11,
Proliferation can be suppressed, and an increase in bacteria in the bath water can be prevented.

Further, there is provided switching means including three-way valves 17 and 18 for selecting a path of bath water passing through the septic tank and a path passing through the septic tank, and a control circuit for controlling the switching means. As a result, it is possible to prevent a chemical having a high concentration of sterilization effect from being sent to the septic tank 2 by the switching means including the three-way valves 17 and 18, without damaging the bio (microorganisms) cultured in the septic tank 2. Bacteria can be prevented from adhering to and proliferating on the inner surface of the pipe line 11, and an increase in bacteria in the bath water can be prevented.

Further, when the chlorine agent is added at least one hour before bathing, the chlorine concentration decreases during bathing, and the bath can be taken without odor or irritation due to the chlorine agent.

In addition, by performing back washing about 30 minutes after charging the chlorine agent, excess bio (microorganisms) and dirt adhering to the purification material can be more effectively washed with the chlorine agent, and the purification performance is improved. It can be easily maintained.

Embodiment 2 FIG. FIG. 4 is a view showing another embodiment of the automatic medicine injection device. In FIG. 4, 11a is a pipe 20 which constitutes a part of the pipe line 11 shown in FIG.
31 is a medicine tank, 32 is a drive unit, 33 is a dissolution tank, 34
Is a three-way valve, 35 is a drainage hose, 36 is a motor in the drive unit, and 37 is a charging means comprising a medicine charging rotary body.

The granular medicine is put into the medicine tank 31, and the medicine supply rotating body 37 is rotated by the motor 36 in the drive unit 32, and a fixed amount of the granular medicine is introduced into the dissolution tank 33. Before charging the granular drug into the dissolution tank 33, the valve 20 and the three-way valve 34 are used.
, The bath water is injected, and the valve 20 and the three-way valve 34
To lock the bath water. The granular drug is put into the dissolving tank, and the bath water containing the dissolved granular drug is supplied to valve 2.
0 and the three-way valve 34 are driven to mix and inject into the bath water and put into the bathtub.

After the injection, the valve 20 and the three-way valve 34 are driven to temporarily confine the bath water in the dissolving tank. After that, only the three-way valve 34 is driven to drain the bath water of the dissolving tank, and the liquid in the dissolving tank is drained. Drain.

The drive section 32 has a heating element, and the humidity is reduced by warming the chemical tank 31 and the dissolving tank 33.
Keep dry except when injecting the drug.

In the bath water circulating filtration apparatus according to the second embodiment, the granular drug is once dissolved in the dissolving tank 33, the concentration thereof is reduced, mixed and poured into the bath water, and then put into the bath tank 9. According to the bath water circulation filtration device according to the second embodiment, since the granular drug is dissolved in the dissolving tank 33, the drug can be supplied in a state of a low concentration to some extent without directly touching the parts. This makes it possible to provide an inexpensive and long-life device that is not affected by a drug or the like.

Embodiment 3 FIG. 5 is a view showing still another embodiment of the automatic medicine injection device. In FIG. 5, 1
1a is a pipe 20 constituting a part of the pipe line 11 shown in FIG.
Is a valve, 36 is a solid drug, 33 is a dissolving tank, 34 is a three-way valve, and 35 is a drainage hose.

The solid medicine 36 is individually packaged in a single dose to prevent moisture. It is separated from the package by an input means driven by a drive unit, taken out, and put into the dissolution tank 33. The dissolution tank 33 has a valve 20 before the medicine is charged.
And the three-way valve 34 is driven to inject bath water, and the valve 20
Then, the three-way valve 34 is driven to confine the bath water. The medicine is put into the dissolving tank 33, and the bath water containing the dissolved medicine is mixed and injected into the bath water by driving the valve 20 and the three-way valve 34, and is put into the bath tank.

In the bath water circulating filtration apparatus according to the third embodiment, the solid drug 36 is once dissolved in the dissolution tank 33, the concentration thereof is reduced, mixed and poured into the bath water, and then put into the bath 9. According to the bath water circulation filtration device according to the third embodiment, since the solid drug 36 is dissolved in the dissolution tank 33,
The drug can be supplied at a low concentration to some extent without directly touching the parts. This makes it possible to provide an inexpensive and long-life device that is not affected by a drug or the like. In addition, except when the drug is charged,
The melting tank is dried. According to this bath water circulation filtration device, since the drug tank and the dissolving tank are dried except when the drug is charged, the drug is not fixed and a fixed amount of drug can be stably charged.

Embodiment 4 FIG. FIG. 6 is a diagram showing another method of the embodiment of the automatic medicine injection device. In FIG. 6, 4
1 is a medicine tank, 42 is an air pump, 43 is a valve, 44
Is an air hose, 45 (b) is an input-side constant surface leveler, 45
(A) is a medicine tank side constant level device, and 46 is a check valve.

The medicine tank 41 is filled with a liquid medicine in the medicine tank side constant level unit 45 (a), and the medicine is also filled in the input side constant level unit 45 (b) connected via the check valve 46. . An air pump 4 is connected to the input-side constant level device 45 (b).
When pressure is applied in step 2, the liquid level of the medicine in the input-side constant water level unit 45 (b) is pushed down, and the medicine is supplied to the air hose 44.
Let it overflow to the side. This medicine does not flow to the medicine tank side constant water level device 45 (a) side by the check valve 46, but flows to the bathtub through the air hose 44, and is mixed with the bath water. If only air is to be discharged into the bath without charging the medicine, the valve 43
Is operated to supply air to the bathtub through the air hose 44, so that pressure is not applied to the charging-side constant water level unit 45 (b).

In the bath water circulation / filtration apparatus according to the third embodiment, a certain amount of medicine can be introduced without using air to directly contact the medicine with the drive unit.
According to the bath water circulation filtration device according to the third embodiment, since the chemical does not touch the drive unit, the chemical is not attacked by the drive unit or the corrosive chemical, and a low-cost and long-life device can be provided. .

[0044]

According to the automatic medicine dispensing apparatus according to the first aspect of the present invention, the liquid level of the liquid contributing to the introduction of the medicine is changed in accordance with the operation of the driving section, so that a predetermined amount of the medicine is supplied to the circulation channel. Is supplied, a predetermined amount of medicine can be accurately supplied by an indirect operation according to the operation of the drive unit, and an inexpensive and long-life device can be provided.

According to the automatic medicine dispensing apparatus according to the second aspect of the present invention, a predetermined amount of medicine is mixed and injected into the bath water without touching the drive unit by using the float to inject the overflow. Thus, the drive unit is not affected by corrosive chemicals and the like, and an inexpensive and long-life device can be provided.

According to the automatic drug dispensing apparatus according to the third aspect of the present invention, a high-concentration drug is injected into the dissolution tank to some extent before injection and mixing.
By diluting, the concentration is reduced, so that the high-concentration chemical does not come into contact with the component and the components are not attacked by corrosive chemicals and the like, so that an inexpensive and long-life device can be provided.

According to the bath water circulation / filtration apparatus of the fourth aspect, since the drug is dissolved in the dissolving tank, the drug can be supplied in a state of a low concentration to some extent without directly touching the parts. This makes it possible to provide an inexpensive and long-life device that is not affected by a drug or the like. In addition, since the drug tank and the dissolving tank can be dried except when the drug is supplied, the fixed amount of the drug can be stably supplied without fixing the drug.

According to the bath water circulation / filtration apparatus according to the fifth aspect of the present invention, a certain amount of medicine can be introduced without directly contacting the medicine with the driving part by using air. It will not be affected by drugs etc.
An inexpensive and long-life device can be provided.

According to the bath water circulating filtration apparatus according to the sixth aspect of the present invention, the chlorine concentration is reduced at the time of bathing by introducing the chlorine agent at least a predetermined time before bathing, and the chlorine agent is not odored or stimulated by the chlorine agent. You can take a bath.

According to the bath water circulating filtration device of the seventh aspect, after the chlorinating agent is charged, the back washing is performed within a predetermined time, thereby removing excess bio (microorganisms) and dirt adhering to the purifying material. Thereby, cleaning can be performed more effectively, and the purification performance can be easily maintained.

According to the bath water circulation / filtration apparatus according to the eighth aspect of the present invention, by passing the bath water into which the chemical having a bactericidal effect is injected and mixed into the pipe, it is possible to prevent the bacteria from adhering to the inner surface of the pipe and growing. Then, the increase of bacteria in the bath water can be prevented.

According to the bath water circulation / filtration apparatus according to the ninth aspect of the present invention, it is possible to prevent the switching means from sending a high-concentration germicidal agent to the septic tank, thereby damaging the bio (microorganisms) cultured in the septic tank. This prevents bacteria from adhering to and growing on the inner surface of the pipe without adding water, and can prevent an increase in bacteria in the bath water.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a bath water circulation filtration device according to an embodiment of the present invention.

FIG. 2 is a detailed configuration diagram of the automatic medicine injection device according to the embodiment of the present invention.

FIG. 3 is a detailed configuration diagram of an automatic medicine injection device according to another embodiment of the present invention.

FIG. 4 is a detailed configuration diagram of an automatic medicine injection device according to still another embodiment of the present invention.

FIG. 5 is a detailed configuration diagram of an automatic medicine injection device according to still another embodiment of the present invention.

FIG. 6 is a detailed configuration diagram of an automatic medicine injection device according to still another embodiment of the present invention.

FIG. 7 is an overall configuration diagram of a conventional bath water circulation filtration device.

[Explanation of symbols]

1 bath water circulation drive unit, 2 septic tank, 3 control unit, 4
Pump, 5 flow sensor, 6 heater, 7 suction port, 8 water outlet, 9 bathtub, 10 purifying material, 11 piping,
17, 18 three-way valve, 19 automatic medicine injection device, 20
valve.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI C02F 1/50 531 C02F 1/50 531M 540 540B 550 550C 550H 550L 560 560H 560Z 1/76 1/76 A 3/10 3/10 A F24H 1/00 302 F24H 1/00 602L

Claims (9)

[Claims] 1. A liquid level maintaining means for maintaining a liquid level of a liquid contributing to the injection of a medicine at a predetermined level, and a liquid level maintained by the liquid level maintaining means in response to an operation of a driving unit. A dispensing means having a displacing means, wherein the liquid is supplied to a circulation path of a bath water circulating filtration apparatus and a predetermined amount of the medicine is supplied according to a change in the liquid level by the displacing means. Bath water circulating filtration device having a drug injection device. 2. A medicine tank for containing and containing a liquid medicine, a liquid surface maintaining means for maintaining a liquid level of the medicine at a predetermined level, and a liquid of the medicine maintained at a predetermined level by the liquid surface maintaining means. A float inserted below the surface for overflowing the medicine, and a drive unit for inserting the float below the liquid surface of the medicine, overflowing a predetermined amount of the medicine, and supplying the overflow to the circulation path of the bath water circulation filtration device, A bath water circulation / filtration apparatus having a medicine introduction device, wherein a predetermined amount of medicine is introduced in accordance with the operation of the driving section. 3. A bath having a drug injection device according to claim 2, wherein a dilution tank is provided for receiving the drug injected in response to the operation of the drive unit and reducing the concentration thereof. Water circulation filtration device. 4. A dissolving tank for dissolving a solid drug, a first valve for supplying a liquid to the dissolving tank when the drug is charged, and a predetermined amount of the solid drug in the dissolving tank. An input means for inputting, and a second valve for supplying the drug dissolved in the dissolving tank to a circulation path of bath water and emptying the dissolving tank after supplying the dissolved drug. A bath water circulation / filtration device having a drug introduction device. 5. A suction port for sucking bath water from a bathtub, a pump for circulating the bath water from the suction port, a purifying tank for purifying the bath water circulated by the pump, and an air supply for the bath water. An air supply mechanism for containing the medicine, a medicine tank containing a liquid medicine, and liquid level maintaining means for maintaining the liquid level of the medicine at a predetermined level, the liquid level being maintained at a predetermined level by the liquid level maintaining means. Bath water circulation having a medicine introduction device, characterized in that the medicine is overflowed by supplying air from the air supply mechanism to the liquid level of the medicine, and a predetermined amount of medicine is introduced into a circulation path of the bath water circulation filtration device. Filtration equipment. 6. A bath water circulating / filtering device having a chemical injection device according to claim 1, wherein a chlorine agent having a disinfecting effect is introduced a predetermined time before a bathing time period. . 7. The bath water circulating and filtering apparatus having the chemical injecting device according to claim 1, wherein back washing is performed within a predetermined time after the chlorine agent having a disinfecting effect is introduced. 8. A suction port for sucking bath water from a bathtub, a pump for circulating the bathwater from the suction port, and a purification tank for purifying the bathwater circulated by the pump. In the bath water circulating filtration device that discharges the bath water from the water discharge port to the bath tub through the heater, the sterilization effect on the bath water is provided between the pump and the suction port in the circulation flow path from the bath water suction port to the water discharge port. 6. A bath water circulation / filtration apparatus having a medicine introduction device according to claim 1, wherein a certain medicine is introduced. 9. The bath water circulation / filtration apparatus according to claim 8, further comprising switching means for selecting a path passing through the septic tank and a path passing through the septic tank.