JPH11169876A - Bath water cleaning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent bacterium contamination by the biofilms formed within a circulation circuit including the bathtub of a bath water cleaning device. SOLUTION: When the biofilms are formed on the inside wall of the circulation circuit 20, the forming state of the biofilms is detected by a biofilm detecting means 28 and detected information is transmitted by an alarm means 29. Since the detected information is displayed on the alarm means 29, a user is able to easily recognize that the biofilms are formed in the bathtub 19 and the circulation circuit 20. The bathing in the bathtub 19 contaminated with bacteria may be averted by making remedy for cleaning of the bathtub 19 and the circulation circuit 20, replacing of the bath water, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for removing and purifying suspended substances contained in water, and more particularly to a bath water purification device for purifying bath water for business use or home use.

[0002]

2. Description of the Related Art Conventional bath water purifying apparatuses of this type include:
As shown in FIG. 5, a filter of a purifying apparatus using an organic matter decomposing action of microorganisms, a filter cleaning function of cleaning using bath water, and a method of cleaning the filter so that the bath water does not decrease. Some bathtubs have a hot water filling function for pouring a part of hot water at a predetermined flow rate (for example, Japanese Utility Model Laid-Open No. 7-3990).
No. 5).

In FIG. 1, reference numeral 1 denotes a bath heat source for keeping bath water warm or heating water supplied from a water supply pipe 2 and pouring the bath water into a bath tub 3, and includes a bath heat exchanger 4 and a burner 5.
6, 7 are circulating devices for circulating hot water in the bathtub 3, respectively.
It is a filter for purifying bath water, and is provided in a bath circulation path 8 including a bath heat exchanger 4. Reference numerals 9 and 10 denote three-way valves provided on the inlet side and the outlet side of the filter 7, respectively. By switching the flow direction of the filter 7, purification of bath water and washing of the filter 7 are enabled. . Reference numeral 11 denotes a drainage pipe for draining washing wastewater that has washed the filter 7 and is connected to a three-way valve 9 provided on the inlet side of the filter. Reference numeral 12 denotes a hot water supply pipe connected to a bath heat source, and a hot water tap 13 is connected to an end of the hot water supply pipe. Reference numeral 14 denotes a filling tube connecting the bath circulation path 8 downstream of the three-way valve 10 and the hot water supply pipe 12, and is provided with a check valve 15 and a solenoid valve 16.
Reference numeral 17 denotes a water flow rate detection sensor provided in the bath circulation path 8 to detect a flow rate discharged to the bathtub 3.

In this configuration, when the circulation device 6 is operated, the bath water is circulated, and the ammonia and proteins contained in the bath water are decomposed by passing through the filter 7 in which microorganisms have propagated from the lower side to the upper side. , Bath heat exchanger 4
, And is returned to the bathtub 3.

When the filter 7 is washed, the flow path is switched by three-way valves provided on the inlet side and the outlet side of the filter 7 and the circulator 6 is operated, so that the bath water flows from the upper side of the filter 7. The dirt that flows downward and adheres to the inside of the filter 7 flows out of the drain pipe 11 to the outside.

[0006] Thereafter, in order to prevent the amount of hot water in the bathtub 3 from decreasing, the hot water generated by the bath heat source 1 is supplied to the hot water filling pipe 1.
3. The bath tub 3 was poured through the bath circulation path 8.

[0007]

That is, in the above-mentioned conventional bath water purification system, in order to purify the microorganisms by enzymatic activity, the microorganisms are propagated on the microorganism carrier in the filter to form a biofilm. The purifying performance was secured. For this reason, a biofilm was also formed in the circulation circuit. However, biofilms provide nutrients to bacteria and promote their growth, or protect bacteria from bactericidal effects such as fungicides, and serve as a so-called breeding ground for bacteria. This amoeba becomes a host of Legionella spp., Which is a pathogen of Legionella pneumonia, and Legionella spp. Grows. As a result, there was a problem that the bathtub and the circulation circuit were bacteriologically contaminated.

[0008]

In order to solve the above-mentioned problems, the present invention provides a circulation circuit including a bathtub, a circulation means provided in the circulation circuit for circulating water, and a suspension circuit provided in the circulation circuit and contained in bath water. The apparatus is provided with a physical purification means for removing suspended substances, a biofilm detection means for detecting a biofilm formed in a circulation circuit by propagation of bacteria, and a notification means for reporting a detection result of the biofilm.

[0009] According to the above invention, the biofilm formation means in the circulation circuit is detected and notified by the biofilm detection means, so that the user can know the degree of contamination of the circulation circuit by bacteria and replace water. By taking such measures, use of bath water contaminated with bacteria can be avoided. In addition, unnecessary replacement of bath water is eliminated, and the bath water can be used effectively.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A bath water purifying apparatus according to a first aspect of the present invention includes a circulation circuit including a bathtub, a circulation means provided in the circulation circuit for circulating bath water, and a circulation circuit provided in the circulation circuit. It has a physical purification means for physically filtering a suspended substance contained therein, a biofilm detection means for detecting a biofilm formed in a circulation circuit by propagation of bacteria, and a notification means for reporting a detection result of the biofilm. Things.

The biofilm detecting means detects and reports the state of biofilm formation in the circulation circuit, so that the user can know the degree of bacterial contamination in the circulation circuit and take measures such as replacing bath water. By doing so, it is possible to avoid bathing in bath water contaminated with bacteria.

In the bath water purification apparatus according to a second aspect of the present invention, the biofilm detecting means has a light emitting section provided on the inner wall of the circulation circuit and a light receiving section for receiving light from the light emitting section. In this configuration, the biofilm is detected based on the amount of light attenuation in the above.

[0013] When the biofilm is formed on the inner wall of the circulation circuit, the amount of light received by the light receiving unit is reduced with respect to the light emitted from the light emitting unit. That is, an equivalent biofilm formation state is detected by detecting and analyzing the amount of light attenuation. Therefore, without taking time for measurement,
It can be measured easily.

According to a third aspect of the present invention, in the bath water purifying apparatus, the biofilm detecting means is provided between the bathtub and the suction side of the circulating means.

[0015] If the purification circulation operation is performed for a long period of time, suspended matter slightly precipitates and accumulates on the suction side of the circulation circuit connected to the bathtub. This deposited suspended matter provides nutrition to the bacterial community and promotes growth. Therefore, the formation of the biofilm proceeds from the suction side of the circulation circuit connected to the bathtub. However, since the biofilm detecting means is provided between the bathtub and the suction side of the circulating means, it is possible to detect the biofilm in the circulating circuit corresponding to the initial biofilm formation. Therefore,
It is possible to notify the user before the entire circuit is covered with the biofilm.

According to a fourth aspect of the present invention, there is provided a bath water purification apparatus having a bypass pipe for bypassing a bath tub, wherein a closed circulation circuit can be formed by flow path switching means. The high-temperature water can be circulated for a predetermined period of time by a heating means provided in the apparatus.

Then, the biofilm detecting means
When a biofilm is detected, a closed circulation circuit is constituted by the flow path switching means, and water in the closed circulation circuit is heated to a high temperature (for example, 70 ° C.) by the heating means and circulates for a predetermined time. As a result, the biofilm formed in the closed circulation circuit is peeled off by the thermal energy of the high-temperature circulating water,
Bacteria including pathogens that have begun to propagate in the biofilm are killed by the heat. Therefore, bacterial contamination in the closed circuit can be prevented.

The bath water purifying apparatus according to claim 5 of the present invention has a structure in which a high-temperature circulating water draining means is provided in the circulation circuit, and after the high-temperature water is circulated in the closed circulation circuit for a predetermined time, the high-temperature water is drained outside. It is what it was.

The circulated high-temperature water contains fragments of biofilms and dead bodies of bacteria including pathogenic bacteria, and the amount of suspended matter is extremely large. However, since the water is discharged to the outside by the drainage means, the water is not returned to the bathtub even when the cleaning operation is performed again. For this reason, not only the bath water becomes turbid, but also the organic matter serving as a nutrient source of bacteria in the entire bath water system can be reduced, and the proliferation of bacteria can be reduced.

The bath water purifying apparatus according to claim 6 of the present invention has a constitution in which suspended substances deposited on the filter medium of the purifying means are drained from the direction opposite to the normal filtration direction and discharged to the outside as a drain means. It was done.

Since the filter medium is washed with the high-temperature water after the high-temperature circulation, the purifying means can be effectively used, and the bath water can be effectively used, and the back-flow cleaning with the high-temperature water effectively prevents clogging of the purifying means. As a result, good purification ability can be maintained for a long period of time.

The bath water purifying apparatus according to claim 7 of the present invention has hot water supply means capable of supplying high-temperature water in a circulation circuit,
The configuration is such that high-temperature water is supplied into the circulation circuit for a predetermined time and drained to the outside based on the biofilm detection result.

Then, the biofilm detecting means
When the biofilm is detected, hot water is supplied to the circulation circuit by the hot water supply means for a predetermined time. As a result, the biofilm formed in the circulation circuit is exfoliated by the thermal energy of the high-temperature water, and bacteria including pathogenic bacteria that have begun to propagate in the biofilm are killed by heat and discarded from the drainage means to the outside. . Therefore, bacterial contamination in the circulation circuit can be prevented, and high-temperature water can be obtained in a short time by the hot water supply means.

The bath water purification apparatus according to claim 8 of the present invention has a timer means for setting a bathing set time zone, and performs a biofilm detection operation outside the bathing set time zone.
High-temperature circulation is performed in the closed circulation circuit by the heating means, or high-temperature water is passed through the circulation circuit by the hot water supply means.

Then, the biofilm is detected outside the bathing time period. If the biofilm is detected, the purifying operation is stopped and high-temperature circulation is performed in the closed circulation circuit by the heating means, or high-temperature water is circulated by the hot water supply means. Since the operation of passing water through the circuit is performed, the purifying operation of the bathing water can be always performed during the bathing time period, and clear bathing water is secured at any time during the bathing time period.

A bath water purifying apparatus according to a ninth aspect of the present invention has a cleaning medium supply means for mixing a cleaning medium for cleaning the inside of a bathtub and a circulation circuit into circulating water, and based on a biofilm detection result. The cleaning medium is supplied to perform the circulation cleaning operation, and thereafter, the water in the bathtub is drained to the outside.

Then, a chemical or physical cleaning medium such as a bathtub cleaning agent is supplied from the cleaning medium supply means, and the inside of the cleaning circuit including the bathtub and the cleaning means is cleaned for a predetermined time. This eliminates the need to artificially clean the bathtub, removes the biofilm generated in the purification circuit, and prevents bacterial contamination of the bath water, that is, bacterial infection to the human body.

In the bath water purifying apparatus according to claim 10 of the present invention, the biofilm detecting means has a number-of-detections recording unit,
When the number of times of biofilm detection becomes equal to or more than a predetermined number, a cleaning medium is supplied to perform a circulating purification operation, and thereafter, water in the bathtub is drained to the outside.

If the number of detections of the biofilm is within a predetermined number, the circulation circuit is washed and sterilized by high temperature. If the number of detections of the biofilm detection means reaches the predetermined number, a cleaning medium such as a bathtub detergent is used. Cleaning will be performed. Therefore, it is possible to achieve both prevention of bacterial contamination of the bath water by washing and sterilizing the circulation circuit, that is, prevention of bacterial infection to the human body, and water saving by reducing the number of washings using a detergent.

[0030]

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a bath water purification device according to a first embodiment of the present invention, and FIG. 2 is a schematic configuration diagram of a biofilm detection unit. In FIG. 1, reference numeral 18 denotes a circulation pump which is a circulation means for circulating water in a bathtub 19, and reference numeral 20 denotes a circulation circuit. Reference numeral 21 denotes a filtering means provided in the circulation circuit on the discharge side of the circulation pump.
1a and a filter bed 21b supporting the particulate filter medium 21a.

Reference numeral 22 denotes a filter medium 21 in the filter means 21.
a positive electrode 22a made of aluminum and a negative electrode 2 made of stainless steel.
2b, and a constant current power supply 22c for energizing between the electrodes.

Reference numeral 23 denotes a heating means provided in the circulation circuit 20 for adjusting the temperature of the circulating bath water.
And a thermistor 23b for detecting the water temperature in the circulation circuit. Reference numeral 24 denotes drainage means provided in the circulation circuit 20 between the downstream side of the filtration means 21 and the bathtub, and has a drainage pipe 24a and a drainage valve 24b.

Reference numeral 25 denotes a three-way valve provided in a circulation circuit between the drain means 24 and the bathtub, and reference numeral 26 denotes a heating means 23.
It is a three-way valve provided in a circulation circuit between the tub 19 and the tub 19. Further, reference numeral 27 denotes a bypass pipe for bypassing the bathtub 19, and the three-way valve 25, the bypass pipe 27, the three-way valve 26, the heating means 23, the circulation pump 18, and the filtration means 21 constitute a closed circulation circuit.

Reference numeral 28 denotes a biofilm detecting means provided in the circulation circuit 20 between the three-way valve 26 and the heating means 23. As shown in FIG.
The light emitting section 28a having an LED (diode) and the light receiving section 28b having an optical sensor for receiving emitted light are provided on the outer periphery of a circulation circuit having a light transmitting section 28c. The light receiving unit 28b is provided with a determination unit 28d that receives a transmitted light signal and determines the formation state of the biofilm from its attenuation state, and a recording unit 28e that records the number of times the biofilm is detected. Reference numeral 29 denotes a notification unit that receives a signal from the biofilm detection unit 28 and notifies the user of the detection of the biofilm to the user.

A cleaning medium supply means 30 is provided between the suction side of the circulation pump 18 and the bathtub 19 and supplies a cleaning medium 30a made of a chemical cleaning agent such as a surfactant to the circulating water. The mixing amount is controlled by 30b.

Reference numeral 31 denotes timer means, and reference numeral 32 denotes a controller which controls each section and each means.

Next, the operation and operation of this embodiment will be described. After bathing in the bathtub 19, during the bathing time period set by the timer means 31, the circulation pump 18 operates to circulate the bathwater as shown by the solid line arrow in FIG. Is passed through the filtering means 21 and purified. At a predetermined time of the purifying operation, the flocculation means 22 is operated by the controller 32. That is, a voltage is applied between the positive electrode 22a and the negative electrode 22b by the constant current power supply 22c, and aluminum ions are eluted from the positive electrode 22a by electrolysis. The aluminum ions react with water to form aluminum hydroxide colloid. Here, suspended substances such as sebum / stain and bacteria are negatively charged because they have a carboxyl group in the side chain. On the other hand, since aluminum hydroxide has a positive charge, aluminum hydroxide serves as a binding medium, and a fine suspended substance is adsorbed by the crosslinking action to increase the diameter of the substance, so-called agglomerated flocs are generated. As a result, the flocculated floc is effectively filtered in the deep portion of the filter medium 21a, and the purification can be performed in a short time. According to the experiment, when the water to be purified having a turbidity of 2 degrees was filtered while passing 300 mA between the electrodes, 0.5 degrees or less was obtained after a lapse of 20 minutes. That is, in the present embodiment, the user continues (for example, 3
(0 minute interval) Even if you take a bath, you can bathe in clear bath water.
When the temperature of the bath water drops, the heating means 23 is activated and maintained at a temperature suitable for bathing.

On the other hand, dirt and bacteria adhering to the human body by taking a bath are brought into the bath water, and the bath water contains abundant substances such as amino acids and proteins, which are nutrient sources of the bacteria, and contains bacteria. Since the temperature environment is suitable for growth, the introduced bacteria are actively grown in the bathtub and the circulation circuit 20. As a result, even though the bath water is visually clear as the number of bathing days elapses, the inner wall surface of the circulation circuit 20 and the wall surface of the bathtub 19 are gradually bacteriologically contaminated, and a biofilm is formed. Looks like According to our confirmation experiment, it is confirmed that a biofilm is formed with time from the suction side of the circulation pump 18 to the discharge side of the circulation pump 18 on the wall of the circulation circuit 20. In this embodiment, since the biofilm detecting means 28 provided between the suction side of the circulation pump 18 and the bathtub 19 is provided, the biofilm is transmitted from the light emitting unit 28a before the biofilm is formed in the entire circulation circuit 19. The determination unit 28c determines the formation of the biofilm based on the amount of attenuation of the received light at the light receiving unit 28b. That is, outside the bathing time period set by the timer means 31, the notification means 29
From the user. Further, at the same time, the three-way valve 25 and the three-way valve 26 are switched so that a closed circulation circuit is formed by the three-way valve 25, the bypass pipe 27, the three-way valve 26, the heating means 23, the circulation pump 18, and the filtration means 21. The circulation pump 18 and the heating means 2 are used to circulate the water in the closed circulation circuit at 70 ° C. for 3 minutes or more as indicated by the arrows.
3 is operated. By operating in this manner, the biofilm formed in the circulation circuit is peeled off from the inner wall of the circulation circuit 19, and the bacteria are completely killed. Thereafter, the three-way valve 26 is connected to the bathtub 19 and the circulation pump 1.
8 so that they communicate with each other.
When the circulation pump 19 is operated again by opening 4b, the biofilm peeled in the circulation circuit 19 is discharged to the outside. As a result, the biofilm is also removed from the vicinity of the light emitting portion 28a and the light receiving portion 28b of the biofilm detecting means, the light attenuation rate is restored, the biofilm detection by the notifying means 29 is canceled, and the number of times of biofilm detection is reduced. The data is recorded in the recording unit 28d. Furthermore, if the number of times of detection and recording exceeds a predetermined value due to long-term operation, the circulation circuit 30b is opened by the cleaning medium supply means 30 through the on-off valve 30b in which the chemical cleaning medium 30a containing a surfactant or sodium bicarbonate is opened. The circulating water is mixed with the circulating water 20 and the inside of the circulating circuit 20 including the wall of the bathtub 10 and the filtering means 21 is washed by the circulating operation. The bath water after washing is forcibly discarded outside by the drainage means 24.

As described above, the present embodiment has the following effects. (1) The biofilm detection means notifies the user of the state of formation of the biofilm in the circulation circuit, so that the user can easily know the degree of bacterial contamination and take measures such as replacing the bath water. It is possible to avoid bathing in the bath water.

(2) Unnecessary replacement of bath water is eliminated, and bath water can be used effectively. (3) An initial biofilm formation can be detected by providing the biofilm detecting means between the bath in which the biofilm is easily formed and the suction side of the circulation means.

(4) Since the inside of the closed circuit is circulated at a high temperature for a predetermined time by the heating means, the biofilm is peeled off and bacteria including pathogenic bacteria can be killed by heat.

(5) Since high-temperature water is circulated for a predetermined time and drained to the outside, the amount of organic matter serving as a nutrient source of bacteria in the entire circulatory system is reduced, and propagation can be reduced.

(6) Detection of a biofilm outside the bathing time period by the timer means for setting the bathing time period;
Since the high-temperature circulating operation accompanying this is performed, it is possible to always purify the bath water during the bathing time zone, and to secure clear bath water at any time.

(7) If the number of detected biofilms is equal to or less than a predetermined number, the circulation circuit is washed and sterilized at a high temperature. If the number of times exceeds the predetermined number, a cleaning medium is supplied to perform a cleaning operation of the circulation circuit. It is possible to achieve both the prevention of bacterial contamination of bath water (= prevention of bacterial infection to the human body) and the saving of water by reducing the number of cleanings using a cleaning agent.

(8) Aluminum hydroxide is generated by the aggregating means, and fine filtration can be effectively performed by the filter medium means to adsorb fine suspended substances to increase the diameter. That is, purification can be performed in a short time.

(Embodiment 2) FIG. 3 shows a configuration diagram of a bath water purifying apparatus according to Embodiment 2 of the present invention. In FIG.
Is a bypass pipe which bypasses the filtration means 21, and 34 is a three-way valve which is provided above the filtration means 21 and which can be switched to a drain pipe 35 communicating with the discharge side of the circulation pump 18 or the outside. Reference numeral 36 denotes a three-way valve provided below the filtering means 21 and which can be switched to an outflow side to the bathtub 19 or to the bypass pipe 33. When the three-way valve 34 is in communication with the discharge side of the circulation pump 18, the three-way valve 36 is in communication with the outflow side to the bathtub 19. Reference numeral 36 is switched so as to be communicated with the bypass pipe 33, and is configured as a backwashing means capable of washing the filtering means 21. Reference numeral 37 denotes a controller that controls each unit and each unit. The components having the same reference numerals as those in the first embodiment have the same structure, and a description thereof will be omitted.

Next, the operation and operation of this embodiment will be described. When the biofilm starts to be gradually formed in the circulation circuit 19, the biofilm is detected by the biofilm detecting means 28, and is notified to the user from the notifying means 29. Circulation is performed at high temperature in the closed circuit. Therefore, the biofilm formed in the circulation circuit is peeled off from the inner wall of the circulation circuit 19, and the bacteria are completely killed. Thereafter, the three-way valve 26 communicates the bathtub 19 with the heating means 23, the three-way valve 34 communicates the drain pipe 35 with the filtration means 21, and the three-way valve 3
6 is switched so that the discharge side of the circulation pump 18 communicates with the filtration means 21, and the circulation pump 19 is operated. As a result,
As shown by the solid arrows in FIG. 2, the separated biofilm is discharged through the bypass pipe 33 together with the circulating water flowing into the filtration means 23 from the opposite direction to the normal filtration direction.
5 to the outside. At this time, the filtering means 21
The suspended matter deposited in the inside is discharged to the outside by the washing water, so that the inside of the filtering means 21 is washed. The operation and action are the same as in the first embodiment, and a description thereof will be omitted.

As described above, the present embodiment has the following effects. (1) The amount of hot water in the bathtub that is discarded as washing water can be reduced because the high-temperature water circulated at high temperature is not discarded as it is but is used for washing the filtering means.

(2) Since the filtration means is washed with high-temperature water circulated at a high temperature, the effect of washing the inside of the filtration means with high-temperature water is improved.

(Embodiment 3) FIG. 4 shows a configuration diagram of a bath water purifying apparatus according to Embodiment 3 of the present invention. In FIG.
Hot water supply means for supplying high-temperature water or hot water to the circulation circuit 19 and the bathtub 19 is connected to the bypass pipe 27. 39 is a circulation circuit 2 between the filtration means 21 and the circulation pump.
The drain means is connected to a drain valve 39a and a drain pipe 39b. Reference numeral 40 denotes a controller that controls each unit and each unit. The components having the same reference numerals as those in the first embodiment have the same structure, and a description thereof will be omitted.

Next, the operation and operation of this embodiment will be described. When the biofilm starts to be gradually formed in the circulation circuit 19, the biofilm is detected by the biofilm detecting means 28, and is notified to the user from the notifying means 29. At the same time, the three-way valve 25 communicates the bypass pipe 27 and the heating means 23, the three-way valve 26 communicates the bypass pipe 27 and the lower side of the filtration means 21, and the drain valve 40a is opened and the hot water supply means 38 is opened with the solid arrows in FIG. When the high-temperature water is supplied as shown in (1), the biofilm generated and adhered to the inner wall of the circulation means 21 is peeled off, and the bacteria are discarded to the outside while being sterilized by heating.

At the same time, the high-temperature hot water flowing into the filtration means 23 from the direction opposite to the normal filtration direction in the filtration means 21 is discarded from the discharge means 39 to the outside. Therefore, the inside of the filtering means 21 is washed. After the high-temperature circulation operation is performed, high-temperature water can be supplied by the hot water supply means 38 to perform cleaning.

As described above, the present embodiment has the following effects. (1) Circulation circuit 2 using high-temperature water supplied from water heater
In order to clean the inside of the filter 0 and the inside of the filtration unit 21, the filtration unit 21 and the circulation circuit 20 can be reliably performed.

(2) Since high-temperature water is generated by the water heater, the biofilm can be removed in a shorter time than when high-temperature water is produced while being circulated by the heating means.

[0055]

As described above, in the bath water purifying apparatus according to the first aspect of the present invention, the biofilm detecting means detects and informs the state of biofilm formation in the circulation circuit, so that the user can control the bacteria. The degree of contamination can be easily known, and by taking measures such as replacing the bathing water, it is possible to avoid bathing in the bacterially contaminated bathing water. In addition, unnecessary replacement of bath water is eliminated, and the bath water can be used effectively.

The bath water purifying apparatus according to claim 2 of the present invention comprises a light emitting section provided on the inner wall of the circulation circuit as a biofilm detecting means, and a light receiving section provided on the inner wall of the circulation circuit and receiving light from the light emitting section. The equivalent biofilm formation state can be easily measured by detecting and analyzing the amount of light attenuation in the light receiving unit, and the bacterial contamination level can be notified to a user who is taking a bath.

In the bath water purifying apparatus according to the third aspect of the present invention, when the biofilm detecting means is circulated, suspended substances contained in water precipitate and adhere to the bath and the circulating means easily sucks the biofilm. Provision of the biofilm in the circulation circuit enables the detection of the biofilm in the circulation circuit corresponding to the initial biofilm formation. Therefore, the user can be notified before the entire inside of the circulation circuit is covered with the biofilm.

In the bath water purifying apparatus according to claim 4 of the present invention, when the biofilm is detected by the biofilm detecting means, a closed circulation circuit is formed, and the inside of the closed circulation circuit is circulated at a high temperature for a predetermined time by the heating means. Therefore, the biofilm formed in the closed circuit is peeled off, and bacteria including pathogenic bacteria are killed by heat. Therefore, bacterial contamination in the closed circuit can be prevented.

In the bath water purifying apparatus according to the fifth aspect of the present invention, after circulating high-temperature water in the closed circulation circuit for a predetermined time,
Since the water is drained to the outside, the biofilm containing the carcass of the germ including the exfoliated pathogen is discharged to the outside, and is not returned to the bathtub even if the cleaning operation is performed again. Therefore, not only the bath water becomes turbid, but also the organic matter serving as a nutrient source of the bacteria in the entire bath water system is reduced, and the proliferation of the bacteria can be reduced.

In the bath water purifying apparatus according to claim 6 of the present invention, since the backwash means of the purifying means is also used as the drainage means, high-temperature water is drained while the filter medium is cleaned by the purifying means. Therefore, the bath water can be effectively used, and clogging of the purifying means is prevented, so that good purifying performance can be maintained for a long time. Also, a special drainage member for drainage becomes unnecessary.

A bath water purifying apparatus according to a seventh aspect of the present invention forms hot water in the circulation circuit while supplying high-temperature water from the hot water supply means to the circulation circuit for a predetermined time based on the biofilm detection result. The biofilm containing the bacteria is exfoliated, killed by heat and discarded outside. Therefore, bacterial contamination in the circulation circuit can be prevented, and high-temperature water can be obtained in a short time because of the provision of hot water supply means.

In the bath water purifying apparatus according to the eighth aspect of the present invention, the timer means for setting a bathing set time zone detects a biofilm outside the bathing time zone and circulates high temperature in the closed circulation circuit or hot water supply means. Accordingly, the operation of passing high-temperature water through the circulation circuit is performed, so that the bath water can be always purified during the bathing time. Therefore, clear bathing water is secured at any time during the bathing time.

In the bath water purifying apparatus according to the ninth aspect of the present invention, the cleaning medium is supplied from the cleaning medium supply means to clean the inside of the cleaning circuit including the bathtub and the purifying means. The trouble of implementing is saved. Further, the biofilm generated in the purification circuit can be removed, and bacterial contamination of the bath water, that is, bacterial infection to the human body can be prevented.

In the bath water purifying apparatus according to the tenth aspect of the present invention, when the number of times of biofilm detection by the number-of-times-of-detection recording unit exceeds a predetermined number, a cleaning medium is supplied to perform a circulating purification operation. If this is the case, cleaning and sterilization of the circulation circuit at a high temperature can be performed, thereby preventing bacterial contamination of the bath water by cleaning and sterilizing the circulation circuit, that is, preventing bacterial infection to the human body, and saving water by reducing the number of cleanings using a cleaning agent.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a bath water purification device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a biofilm detecting means of the bath water purification device.

FIG. 3 is a configuration diagram of a bath water purification device according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram of a bath water purification device according to a third embodiment of the present invention.

FIG. 5 is a configuration diagram of a conventional bath water purification device.

[Explanation of symbols]

 Reference Signs List 18 circulation pump 19 bathtub 20 circulation circuit 21 filtration means 23 heating means 24 drainage means 25, 26 three-way valve 27 bypass pipe 28 biofilm detection means 28a light emission part 28b light reception part 28c determination part 28d detection recording part 29 notification means 30 cleaning medium supply Means 30a Cleaning medium 31 Timer means 33 Bypass pipe 34, 36 Three-way valve 35 Drain pipe 38 Hot water supply means 39 Drain means

Claims (10)

[Claims] A circulating circuit including a bathtub, a circulating means provided in the circulating circuit for circulating bath water, a physical purification means provided in the circulating circuit for removing suspended substances contained in the bath water, and a bacterium. A bath water purification device provided with a biofilm detecting means for detecting a biofilm formed in the circulation circuit by propagation of the biofilm, and a notifying means for notifying a detection result of the biofilm. 2. The biofilm detecting means has a light emitting section provided on the inner wall of the circulation circuit, and a light receiving section provided on the inner wall of the circulation circuit and receiving light from the light emitting section. 2. The bath water purifying apparatus according to claim 1, wherein the biofilm is detected based on the amount of attenuation. 3. The bath water purifier according to claim 1, wherein the biofilm detecting means is provided between the bathtub and the suction side of the circulating means. 4. A closed circuit is provided by a bypass pipe for bypassing a bathtub, a closed circuit can be formed by a flow path switching means, and high-temperature water is predetermined by a heating means provided in the closed circuit based on a biofilm detection result. The bath water purifying apparatus according to any one of claims 1 to 3, wherein the bath water purifying apparatus is configured to be capable of time circulation. 5. A circulation circuit provided with a means for draining high-temperature circulating water,
5. The bath water purifying apparatus according to claim 4, wherein high temperature water is circulated in the closed circulation circuit for a predetermined time and then drained to the outside. 6. The bath water according to claim 4, wherein the drainage means is configured to pass suspended matter deposited on the filter medium of the purification means in a direction opposite to a normal filtration direction and discharge the suspended matter to the outside. Purification device. 7. A hot water supply means capable of supplying high-temperature water in the circulation circuit, wherein the high-temperature water is supplied to the circulation circuit for a predetermined time based on a biofilm detection result and discharged to the outside. The bath water purifying apparatus according to any one of claims 6 to 13. 8. A timer for setting a bathing set time zone, performing a biofilm detection operation outside the bathing set time zone, and circulating a high temperature in a closed circulation circuit by a heating means.
8. The bath water purifying apparatus according to claim 4, wherein the hot water is supplied to the circulation circuit by hot water supply means. 9. A cleaning medium supply means for mixing a cleaning medium for cleaning the inside of the bathtub and the circulation circuit into the circulating water is provided, and a cleaning medium is supplied based on a biofilm detection result to perform a circulation purification operation. The bath water purifier according to any one of claims 1 to 8, wherein water in the bath tub is drained to the outside. 10. The biofilm detecting means is provided with a number-of-detections recording section, and when the number of times of biofilm detection reaches a predetermined number or more, a cleaning medium is supplied to perform a circulating purification operation, and then water in the bathtub is drained to the outside. The bath water purification device according to claim 9, wherein