JP3858330B2 - Water purification equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water purification device that removes and purifies suspended substances contained in water to be purified, and more particularly to a water purification device that can effectively reduce the growth of bacteria within the device.
[0002]
[Prior art]
A conventional water purification apparatus of this type has been disclosed in JP-A-8-5141. As shown in FIG. 4, this water purification apparatus is provided with hot water purification means 2 that uses a gas water heater 1 as a heat source to maintain bath water at a constant temperature and that utilizes the enzyme activity of microorganisms. The gas water heater 1 has a gas plug 3, a water tap 4, a gas burner 5, a hot water supply heat exchanger 7 for a hot water supply terminal 6, and a heat insulation heat exchanger 8 for keeping the bath water warm. A porous microorganism propagation carrier 9 is provided inside the warm water purification means 2. A circulation pump 10 circulates hot water in the bathtub 11, and is provided in a circulation path 14 having an outward pipe 12 and a return pipe 13, and the bathtub 11 sucks in communication with the forward pipe 12 and the return pipe 13, respectively. A bathtub adapter 15 having a port 15a and a discharge port 15b is provided. Reference numeral 16 denotes a control means for controlling the gas water heater 1.
[0003]
In this configuration, when the hot water supply terminal 6 is opened, the control means 16 operates to open the gas plug 3 and the water tap 4, and hot water boiled up by the hot water heat exchanger 7 is discharged from the hot water supply terminal 6. The Also, the bath water is circulated by the circulation pump 10 and heated and kept at a predetermined temperature by the heat-retaining heat exchanger 8, and the aerobic microorganisms that have propagated on the microorganism propagation carrier 9 are passed through the hot water purification means 2 to the bath water. Decomposes suspended substances such as sebum and dirt, and bath water is purified.
[0004]
[Problems to be solved by the invention]
However, the conventional water purification apparatus has the following problems.
[0005]
(1) When the water to be purified is circulated by the circulation pump and passed through the hot water purification means and kept clarified, the circulation direction is always constant, so that the inside of the suction port of the bathtub adapter connected to the forward pipe is particularly long-term. A biofilm (biofilm) is formed. This biofilm supplements the bacterial group with nutrients to promote growth, or protects the bacterial group from bactericidal action such as a bactericide, and serves as a so-called hotbed of the bacterial group. In addition, the protozoan amoeba tends to inhabit the biofilm, and this amoeba becomes a host of Legionella spp. That is the pathogen of Legionella pneumonia, and Legionella spp. As a result, the purified water is bacteriologically contaminated, which is not preferable for safety and health.
[0006]
(2) Since the organic matter decomposition rate of microorganisms is slow, purification takes time. Therefore, when several people take a bath continuously (for example, every 30 minutes), it is necessary to bathe in the bath water of a cloudy state.
[0007]
(3) Since it is a warm water purification means utilizing the enzyme activity of microorganisms, it is necessary to always maintain the bath water at around 40 ° C. in order to maintain the aerobic microorganisms in an active state. For this reason, the inside of the hot water purifying means cannot be sterilized by maintaining a high temperature. In particular, the Legionella spp. Grow rapidly around 35 to 40 ° C., and therefore countermeasures are desired.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a circulation path composed of a forward pipe and a return pipe, a filtration means for purifying suspended substances contained in the water to be purified, a water level detection means, and a purification unit having a control means. A bathtub adapter having a suction port communicating with the forward pipe and a discharge port communicating with the return pipe, and a hot water supply source for supplying hot water to the bathtub through the bathtub adapter, and sucking the bathtub water during the purification operation Suction from the mouth, passing through the filtering means and discharging from the discharge port to the bathtub, and when pouring water into the bathtub when the water level of the bathtub is lowered , the hot water from the hot water supply heat source passes through the forward pipe from the suction port of the tub adapter is intended configured to pouring Allowed ability.
[0009]
According to the above invention, when bath water is reduced and poured, hot water from a hot water supply heat source is poured into the bathtub through the suction port of the bathtub adapter. As a result, the inside of the suction port of the bathtub adapter is washed, generation of a biofilm that becomes a hotbed of the bacterial group can be prevented, and growth of the bacterial group and Legionella can be suppressed.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
A water purification apparatus according to claim 1 of the present invention includes a circulation path composed of a forward pipe and a return pipe, a circulation means for circulating the purified water, a filtration means for purifying suspended substances contained in the purified water, A water level detection means for detecting the water level of the bathtub, a purification unit having a control means, a bathtub adapter provided in the bathtub and having a suction port communicating with the forward pipe and a discharge port communicating with the return pipe, and the bathtub adapter The hot water supply source that supplies hot water to the bathtub through the suction port, and during the purification operation, the bathtub water is sucked from the suction port, passes through the filtering means and is discharged from the discharge port to the bathtub, and the water level of the bathtub is lowered. If in which hot water from the hot water supply heat source during pouring into the bath is configured to pouring available-from the suction port of the bathtub adapter via the forward pipe of.
[0011]
And at the time of pouring into the bathtub, hot water of a predetermined temperature is poured into the bathtub from the suction port of the bathtub adapter different from the normal circulation direction. As a result, the inside of the suction inlet of the bathtub adapter is washed, the generation of a biofilm that becomes a hotbed of the bacterial group can be prevented, and the growth of the bacterial group can be suppressed.
[0012]
Moreover, the water purification apparatus concerning Claim 2 makes the hot water pouring temperature from the suction opening of a bathtub adapter 60 degreeC or more.
[0013]
The bacteria group contained in the bath water is mainly mesophilic bacteria such as Pseudomonas (bacteria that propagate in the range of 25 ° C to 40 ° C) and can be sterilized at a temperature of 60 ° C or higher except for special thermophilic bacteria. Yes, it can be effectively sterilized by washing the suction port at a high temperature of about 60 ° C.
[0014]
The water purifying apparatus according to claim 3 is provided with a coagulating means for coagulating suspended substances contained in the water to be purified with an electrolysis substance as a filtering means, and a filter medium for filtering the aggregated flocs generated by the coagulation. Is.
[0015]
Then, the suspended substance is enlarged by the aggregating means to form an agglomerated floc, which is effectively filtered by the filter medium provided downstream. Therefore, since it is physically filtered without depending on the enzyme activity of the microorganism, purification can be performed in a short time. Therefore, even when a plurality of people take a bath continuously (for example, at intervals of 30 minutes), it is possible to bathe in clear bath water.
[0016]
According to a fourth aspect of the present invention, there is provided a water purification apparatus including a bypass passage communicating the forward pipe and the return pipe, a flow path switching means provided at one end of the bypass passage, and a heating means for heating the water to be purified. A closed circuit including means can be formed, and the inside of the closed circuit can be sterilized at high temperature.
[0017]
Then, by forming a closed circuit and enabling high-temperature sterilization, the purification system including the filtering means in which bacteria can easily grow can be high-temperature sterilized. In particular, the Legionella spp. Can easily propagate in the staying part of the purification system, but can be effectively sterilized by circulating high-temperature water in the closed circuit.
[0018]
The water purifier according to claim 5 is such that the high temperature sterilization temperature in the closed circuit is 60 ° C. or higher.
[0019]
And the high temperature water temperature in a closed circuit can be reliably sterilized by making it 60 degreeC or more, desirably 70 degreeC or more. That is, the bacteria group contained in the bath water is mainly mesophilic bacteria as described above, and can be almost killed at 60 ° C. or higher. Legionella spp. Can be killed in 70 seconds at a few seconds.
[0020]
The water purification apparatus according to claim 6 is provided with a high temperature sterilization control means for controlling the time and number of times of high temperature sterilization.
[0021]
And the sterilization efficiency in heat sterilization (high temperature sterilization) depends on the sterilization temperature and time according to the bacterial species. Moreover, when sterilizing the whole bathtub water by high temperature sterilization of a closed circuit, the frequency | count of high temperature sterilization influences. By providing the high-temperature sterilization control means, suitable sterilization conditions are set, and the water to be purified can be sterilized more effectively.
[0022]
The water purification apparatus according to claim 7 is configured to perform the number of times of high-temperature sterilization of the closed circuit for the number of times that the entire amount of the water to be purified stored in the bathtub can be high-temperature sterilized during one day.
[0023]
And, if the total amount of bathtub water is sterilized at high temperature in the closed circuit during the day, that is, when the water volume of the closed circuit is 5 l and the volume of the bathtub is 200 l, high temperature sterilization operation 40 times / day It becomes possible to suppress bacterial groups in the entire water system including the bathtub.
[0024]
Moreover, the water purification apparatus concerning Claim 8 is set as the structure which discharges the treated water in the closed circuit after high temperature sterilization in a bathtub.
[0025]
And since the treated water in the closed circuit heated to the high temperature by the heating means is discharged to the bathtub, it contributes to the temperature rise of the bathtub water, and the loss of heating energy can be prevented.
[0026]
The water purification apparatus according to claim 9 is provided with backwashing means for washing by clogging clogging due to accumulation of suspended substances on the filtration means from the opposite direction to the filtration direction, The backwashing is performed with high-temperature sterilized water.
[0027]
And since the high temperature treated water in a closed circuit is utilized for the backflow washing | cleaning of a filtration means, the washing | cleaning efficiency of a filtration means improves and it can wash | clean with a small amount of washing water. Moreover, since the treated water containing bacteria killed by high-temperature sterilization is discarded to the outside, the concentration of organic substances contained in the water to be purified can be reduced.
[0028]
Further, the water purifier according to claim 10 is configured to pour hot water from the suction port of the bathtub adapter after the backwashing operation of the filtering means by the hot water in the closed circuit.
[0029]
Then, the inside of the closed circuit is sterilized and cleaned by high-temperature circulation sterilization of the closed circuit and the backflow cleaning of the filtering means, and then the suction port of the unwashed portion of the bathtub adapter is cleaned, so that the entire purification system can be sterilized and cleaned. At the same time, these series of cleaning operations can be performed during the non-bathing time period, and the safety against the inflow of high-temperature water into the bathtub is improved.
[0030]
Embodiments of the present invention will be described below with reference to the drawings.
[0031]
(Example 1)
FIG. 1 shows a configuration diagram of a water purification apparatus in Embodiment 1 of the present invention. In the figure, 17 is a purification unit for purifying the water to be purified in the bathtub 18, and 19 is a hot water supply heat source for pouring water into the bathtub 18 via the purification unit 17.
[0032]
The purification unit 17 is provided above and below the circulation path 22 composed of the forward pipe 20 and the return pipe 21, the circulation means 23 for circulating the water to be purified, the filtering means 24 for filtering and purifying the water to be purified, and the filtering means 24. The three-way valves 25a and 25b and the heating means 26 for keeping the water to be purified, the hot water supply heat source 19 and the purification unit 17 are provided between the open / close valve 27 for controlling the pouring of the hot water into the bathtub 18 and the water to be purified. Temperature detecting means 28 for detecting the temperature of water and water level detecting means 29 for detecting the hot water level of the bathtub 18. Reference numeral 30 denotes backwashing means having a backwashing path 31 and a discharge path 32 communicating with the downstream side of the circulation means 23 and the three-way valve 25b, and 33 denotes control means for electrically controlling the components of the purification unit. . Here, in the filtering means 24, an anode 35 made of aluminum is disposed inside a housing 34 made of stainless steel so as to face the housing 34, and the anode 35 and the cathode (here, the housing 34 is also used). The aggregating means 37 is configured to agglomerate suspended substances contained in the water to be purified to increase the diameter from a constant current power source 36 that applies a voltage between the anode 35 and the cathode 34. Further downstream, a particulate filter medium 38 made of an inorganic material such as alumina is filled through a filter bed 39 to filter the agglomerated floc having a large diameter.
[0033]
The bathtub 18 is provided with a bathtub adapter 42 having a suction port 40 communicating with the forward pipe 20 and a discharge port 41 communicating with the return pipe 21, and the hot water from the hot water supply heat source 19 is opened by opening the on-off valve 27. However, it is configured so that hot water can be poured into the bathtub 18 from the suction port 40 of the bathtub adapter 42 via the forward pipe 20.
[0034]
Next, the operation and action will be described. When pouring into the bathtub 18, the control means 33 operates to open the on-off valve 27, and hot water having a temperature set by the hot water supply heat source 19 is poured from the suction port 40 of the bathtub adapter 42 through the forward pipe 20. . At this time, the hot water from the hot water supply heat source 19 also flows into the filtering means 24 side, but most of the hot water flows to the forward pipe 20 side due to a large passage pressure loss due to the filter medium 38 and the like. The water level in the bathtub 18 is detected by the water level detection means 29. When the water level reaches a predetermined water level, the on-off valve 27 is automatically closed and pouring is stopped.
[0035]
Next, the circulating means 23 is operated so that the water to be purified is circulated as indicated by solid arrows, and the water to be purified contaminated by bathing passes through the filtering means 24. At a predetermined time of the purification operation, the control unit 33 operates to operate the aggregation unit 37. That is, a voltage is applied between the anode 35 and the cathode 34 by the constant current power source 36, and aluminum ions are eluted from the anode 35 by electrolysis. The aluminum ions react with water to form aluminum hydroxide colloids. Here, suspended substances such as sebum, dirt, and bacteria are negatively charged because they have carboxyl groups in their side chains. On the other hand, since aluminum hydroxide has a positive charge, aluminum hydroxide serves as a binding medium, and fine suspended substances are adsorbed by the crosslinking action to increase the diameter, so-called agglomerated flocs are generated. As a result, the aggregated floc is effectively filtered in the deep layer portion of the filter medium 38, and purification in a short time becomes possible. According to the experiment, when water to be purified having a turbidity of 2 degrees was filtered while passing 300 mA between the electrodes, a value of 0.5 degrees or less was obtained after 20 minutes (the same experiment was performed by the enzyme activity of microorganisms). 2 to 3 hours are required). The circulation flow rate at this time is 15 l / min. The bathtub water is kept at a predetermined temperature by the heating means 26.
[0036]
On the other hand, agglomeration flocs containing suspended substances are gradually deposited on the surface of the filter medium by circulation filtration, and the passage pressure loss increases. At this time, the three-way valves 25a and 25b provided above and below the filtration means 24 are switched, and the circulating water passes through the backwash path 31 and the normal filtration direction in the filtration means 24 as indicated by the wavy arrow in FIG. The agglomerated flocs flowing in the opposite direction and containing the suspended matter deposited on the filter medium 38 are washed and discarded to the outside from the discharge path 32.
[0037]
When the water level of the bathtub 18 decreases due to the hot water used during bathing and the above-described backwashing operation, the water level detecting means 29 detects the water level and automatically opens the on-off valve 27. Hot water is poured from the suction port 40 of the bathtub adapter 42 through the forward pipe 20, and the high temperature cleaning of the forward pipe 20 and the suction port 40 is performed. Here, when the water to be purified is circulated and filtered by the circulation means 23 and clarified and maintained, the circulation direction is always constant, and therefore, the suction port 40 of the bathtub adapter 42 connected to the forward pipe 20 especially for long-term use. A biofilm is formed inside. This biofilm supplements the bacterial group with nutrients to promote growth, or protects the bacterial group from bactericidal action such as a bactericide, and serves as a so-called hotbed of the bacterial group. In addition, the protozoan amoeba tends to inhabit the biofilm, and this amoeba becomes a host of Legionella spp. Which is a pathogen of Legionella pneumonia, and Legionella spp. Grows. Since the forward pipe 20 and the suction port 40 are washed at a high temperature with high-temperature water, generation of a biofilm can be prevented. As a result, it is possible to prevent the growth of amoeba, which is a host for the bacterial group and Legionella spp. In addition, the bacteria group contained in the bath water is mainly mesophilic bacteria such as Pseudomonas, and can be sterilized at a temperature of 60 ° C or higher except for special high temperature bacteria, and the suction port 40 is washed at a temperature of 60 ° C or higher. By doing so, it can be effectively sterilized.
[0038]
(Example 2)
FIG. 2 shows a configuration diagram of a water purification apparatus in Embodiment 2 of the present invention. In the second embodiment, reference numeral 43 denotes a bypass path that communicates the forward pipe 20 and the return pipe 21, and includes the heating means 26 and the filtering means 24 by switching operation of the flow path switching means 44 provided at one end of the bypass path 43. A closed circuit can be formed, and the temperature of the water in the closed circuit can be raised to 60 ° C. or higher by controlling the heating means 26 in a state where the closed circuit is formed, and high temperature sterilization can be performed. Reference numeral 45 denotes high-temperature sterilization control means for controlling the time and number of high-temperature sterilization in the closed circuit, and the high-temperature sterilization conditions in this embodiment are as follows. The total amount of the water to be purified stored in the water is controlled so as to be sterilized at high temperature during one day. Specifically, when the water volume of the closed circuit is 5 l and the volume of the bathtub 18 is 200 l, the high temperature sterilization operation is performed 40 times / day. The treated water after high temperature sterilization of the closed circuit is discharged to the bathtub 18 side by the control means 33, and the on-off valve 27 is opened after the backwashing operation of the filtering means 24 described in the first embodiment. Then, the hot water is poured from the suction port 40 of the bathtub adapter 42.
[0039]
In addition, the thing of the same code | symbol as Example 1 has the same structure, and abbreviate | omits description.
[0040]
Next, the operation and action of this embodiment will be described. The hot water pouring into the bathtub 18 and the coagulation filtration by the coagulation means 37 are the same operations and functions as those in the first embodiment, and the description thereof will be omitted.
[0041]
The control unit 33 operates the flow path switching valve 44 at a predetermined time during the circulation filtration, and as shown by the solid line arrow in FIG. 2, the bypass passage 43 is communicated so that the circulation unit 23, the filtration unit 24, and the heating unit 26 are connected. A closed circuit containing is formed. In this state, the high-temperature sterilization control means 45 operates to energize the heating means 26, and the water temperature in the closed circuit is heated to 70 ° C. The heating unit 26 is controlled based on a detection signal from the temperature detection unit 28. When the temperature of the closed circuit reaches 70 ° C., the temperature is controlled to be held for 3 minutes, and the inside of the closed circuit is sterilized at 70 ° C. for 3 minutes. As a result, it is possible to effectively sterilize the bacteria group that grows in the staying part in the closed circuit including the filtering means 24. The bacteria group contained in the bath water is mainly mesophilic bacteria such as Pseudomonas, and can be almost completely sterilized by sterilizing at 70 ° C. for 3 minutes except for special thermophilic bacteria. Legionella can be killed in 70 seconds at a few seconds. Furthermore, the high-temperature circulation also has a cleaning effect on the biofilm formed in the closed circuit, and can prevent the growth of amoeba which is a host of Legionella spp. After the high temperature sterilization operation, the flow path switching valve 44 operates again to start circulation through a normal filtration path, and high temperature water at 70 ° C. is discharged into the bathtub 18 from the discharge port 41. At this time, water at the same low temperature as the bath water remains in the forward pipe 20 and the return pipe 21 other than the closed circuit, and is mixed when discharged into the bathtub 18, so that the actual discharge temperature is 60 ° C. or less. Become. Thereby, high temperature water will contribute to the temperature rise of bathtub water, and can prevent the loss of heating energy.
[0042]
These high-temperature sterilization operations are controlled by the high-temperature sterilization control means 45 so that the entire amount of water to be purified stored in the bathtub 18 can be high-temperature sterilized during one day. Specifically, when the water volume of the closed circuit is 5 l and the volume of the bathtub 18 is 200 l, high temperature sterilization operation is performed 40 times / day. Thereby, the high temperature sterilization of the whole bathtub water is attained, and the bacteria group in bathtub water can be suppressed effectively.
[0043]
Further, when the water level in the bathtub 18 is lowered by the backwashing of the hot water used during bathing and the filtering means 24, the water level detecting means 29 detects the water level and automatically opens the on-off valve 27, so Hot water is poured from the suction port 40 of the bathtub adapter 42 through the forward pipe 20, and the high temperature cleaning of the forward pipe 20 and the suction port 40 is performed to prevent the generation of biofilm. That is, the entire water purification system can be sterilized or cleaned by high-temperature circulation sterilization of the closed circuit and high-temperature cleaning of the suction port 40 of the bathtub adapter 42.
[0044]
FIG. 3 shows the experimental results of Legionella in the bathing water according to this example. The experimental conditions were that four people took a bath per day and the agglomeration current was 300 mA and the current was applied for 1 hour / day. Further, the circulation flow rate during normal filtration is 15 l / min. For comparison, an experimental result using a microbial water purification apparatus is also shown. As shown in FIG. 3, the number of Legionella bacteria gradually increased after about 1 week in the microorganism system B, and 103 CFU / 100 ml or more was detected after 2 weeks, whereas in this example A, it was 102 CFU / 100 ml or less. It turns out that it has the Legionella genus microbe suppression effect.
[0045]
In addition, although the present Example demonstrated what discharges the high temperature water of a closed circuit to the bathtub 18 side, you may utilize high temperature water for the backwashing of the filtration means 24. FIG. That is, after the high-temperature sterilization operation of the closed circuit, the three-way valves 25a and 25b provided on the upper and lower sides of the filter means 24 are switched to pass from the backwash path 31 to the downstream side of the filter means 24 as shown by the wavy arrow in FIG. The agglomerated flock accumulated on the filter medium 38 is washed by flowing water and flowing high-temperature water in a direction opposite to the normal filtration direction. The washed sewage is discarded from the discharge channel 32 to the outside. As a result, the filtration means 24 is back-washed with high-temperature treated water, so that the washing efficiency is improved, and the washing can be performed with a small amount of washing water, thus saving water. Moreover, since the treated water containing bacteria killed by high-temperature sterilization is discarded to the outside, the concentration of organic substances contained in the water to be purified can be reduced.
[0046]
Moreover, it is good also as a structure which pours hot water from the suction inlet 40 of the bathtub adapter 42 after the backwashing operation | movement of the filtration means 24 by the high temperature water of a closed circuit. That is, the high temperature circulation sterilization of the closed circuit and the backflow cleaning of the filtering means 24 perform the sterilization and cleaning in the closed circuit, and then the unwashed portion of the bathtub adapter 42 is cleaned, so that the entire purification system can be sterilized and cleaned. These series of sterilization and washing operations can be performed during a non-bathing time period, and safety against inflow of high-temperature water into the bathtub can be improved.
[0047]
【The invention's effect】
The above-described water purifying apparatus according to claim 1 of the present invention as is Note from the hot water supply heat source during hot high-temperature water into the bathtub when the water level of the bath is lowered, forward pipe which Unlike normal circulation direction After that, it is poured into the bathtub from the suction port of the bathtub adapter. As a result, the inside of the suction port of the bathtub adapter is washed, and the generation of a biofilm that serves as a hotbed for the bacterial group can be prevented, so that the propagation of amoeba serving as a host for the bacterial group and Legionella spp. Can be prevented.
[0048]
Moreover, since the temperature of the pouring from the suction port of the bathtub adapter is set to 60 ° C. or higher, the water purification apparatus according to claim 2 is effective for mesophilic bacteria such as Pseudomonas, which is a central group of bacteria contained in the bath water. Can be sterilized and the biofilm can be effectively washed.
[0049]
The water purification apparatus according to claim 3 is provided with an aggregating means for aggregating the suspended substance contained in the water to be purified with the electrolyzed substance as a filtering means. It is formed and is effectively filtered by a filter medium provided downstream. Therefore, since it is physically filtered without depending on the enzyme activity of the microorganism, purification can be performed in a short time. As a result, even when a plurality of people bathe in succession, it is possible to bathe in clear bathtub water.
[0050]
Moreover, the water purification apparatus according to claim 4 is provided with a bypass path and a flow path switching means provided at one end of the bypass path so that the inside of the closed circuit including the filtering means can be sterilized at high temperature. It is possible to sterilize a purification system including a filtering means that easily propagates. In particular, Legionella spp., Which is a pathogen of Legionella pneumonia, easily propagates in the staying part of the purification system, but can be effectively sterilized by circulating high-temperature water in a closed circuit.
[0051]
Moreover, since the high temperature sterilization temperature in a closed circuit is 60 degreeC or more, the water purification apparatus concerning Claim 5 can kill the Legionella genus bacteria including the mesophilic bacteria contained in bath water reliably. .
[0052]
Moreover, since the water purification apparatus according to claim 6 is provided with the high temperature sterilization control means for controlling the time and number of times of high temperature sterilization, the sterilization conditions according to the bacterial species, that is, the sterilization temperature and time, and the number of times of high temperature sterilization are suitable. The condition is set, and more effective sterilization can be performed.
[0053]
Further, the water purification apparatus according to claim 7 performs the number of times of high temperature sterilization of the closed circuit for the number of times that the entire amount of the water to be purified stored in the bathtub can be high temperature sterilized during the day. During this period, the entire amount of the bath water is sterilized at a high temperature in the closed circuit, and there is an effect of suppressing the bacterial group of the entire water system including the bath.
[0054]
Moreover, since the water purification apparatus concerning Claim 8 discharges | emits the high temperature water in the closed circuit after high temperature sterilization in a bathtub, it will contribute to the temperature rise of bathtub water and can prevent the loss of heating energy.
[0055]
Further, the water purifying apparatus according to claim 9 is provided with the suspension backwashing means of the filtration means and performs the backwashing with the high-temperature sterilized water in the closed circuit, so that the washing efficiency of the filtration means is improved and the amount of washing water is small. Can be washed and saves water. Moreover, since the treated water containing bacteria killed by high-temperature sterilization is discarded to the outside, the concentration of organic substances contained in the water to be purified can be reduced.
[0056]
The water purification apparatus according to claim 10 is for washing the suction port of the bathtub adapter at a high temperature after the backwashing operation of the filtering means by the high temperature water in the closed circuit, so that the entire water purification system can be sterilized and washed. At the same time, these series of cleaning operations can be performed during the non-bathing time period, and the safety against the inflow of high-temperature water into the bathtub is improved.
[Brief description of the drawings]
FIG. 1 is a block diagram of a water purification apparatus in Embodiment 1 of the present invention. FIG. 2 is a block diagram of a water purification apparatus in Embodiment 2 of the present invention. FIG. 3 shows the relationship between the number of bathing days of the apparatus and Legionella spp. Characteristic diagram shown [Fig. 4] Configuration diagram of conventional water purification device [Explanation of symbols]
DESCRIPTION OF SYMBOLS 17 Purification unit 18 Bathtub 19 Hot water supply source 20 Outgoing pipe 21 Return pipe 22 Circulation path 23 Circulation means 24 Filtration means 26 Heating means 30 Backwashing means 33 Control means 37 Aggregation means 40 Suction port 41 Discharge port 42 Bathtub adapter 43 Bypass path 44 Flow Route switching means 45 High temperature sterilization control means

Claims (10)

A circulation path composed of a forward pipe and a return pipe, a circulating means for circulating the purified water, a filtering means for purifying suspended substances contained in the purified water, a water level detecting means for detecting the water level of the bathtub, A purification unit having control means for controlling, a bathtub adapter provided in the bathtub and having a suction port communicating with the forward pipe and a discharge port communicating with the return pipe, and hot water is supplied to the bathtub via the bathtub adapter It consists of a hot water supply heat source, and at the time of purification operation, the bath water is sucked from the suction port, passed through the filtering means and discharged from the discharge port to the bathtub, and when pouring water into the bathtub when the water level of the bathtub is lowered A water purifier configured to allow hot water from the hot water supply heat source to be poured from the suction port of the bathtub adapter via the forward pipe .   The water purification apparatus according to claim 1, wherein the hot water pouring temperature from the suction port of the bathtub adapter is 60 ° C. or higher.   The water purification apparatus according to claim 1 or 2, wherein the filtration means includes aggregating means for aggregating suspended substances contained in the water to be purified with an electrolysis substance, and a filter medium for filtering the aggregated flocs generated by the aggregation.   A bypass path communicating with the forward pipe and the return pipe, a flow path switching means provided at one end of the bypass path, and a heating means for heating the water to be purified to provide a closed circulation path including a filtering means, The water purification apparatus according to any one of claims 1 to 3, wherein the inside of the closed circuit is configured to be capable of high-temperature sterilization.   The water purification apparatus according to claim 4, wherein the high temperature sterilization temperature in the closed circuit is 60 ° C or higher.   The water purification apparatus according to claim 4 or 5, further comprising a high temperature sterilization control means for controlling the time and number of times of high temperature sterilization.   The water purification apparatus according to any one of claims 4 to 6, wherein the number of times of high-temperature sterilization is configured such that the entire amount of water to be purified stored in the bathtub can be sterilized at high temperature during a day.   The water purification apparatus according to any one of claims 4 to 7, wherein the treated water in the closed circuit after the high temperature sterilization is discharged into the bathtub.   A configuration in which backwashing means for washing by clogging due to accumulation of suspended substances on the filtration means by passing water from the opposite direction to the filtration direction is provided, and backwashing is performed with high-temperature sterilized water in the closed circuit. The water purification apparatus according to any one of claims 4 to 7.   The water purifier according to claim 9, wherein hot water is poured from the suction port of the bathtub adapter after the backwashing operation.

Images