JP3924957B2 - Purification device control method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a purification device that can purify bathtub water more cleanly.
[0002]
[Prior art]
As a conventional representative technique, the bath water heater previously disclosed by the present inventors is shown in FIG.
[0003]
In FIG. 9, the code | symbol 101 shows the whole structure of a bath water heater, the hot water supply heat exchanger 103 which heats water to a warm water with a burner, the water temperature sensor 102 which is provided in a water supply path, and detects a water supply temperature, and a water supply flow rate is detected. Water temperature sensor 101 to be provided, hot water supply sensor 104 for detecting hot water temperature, hot water supply amount control valve 105 for controlling the hot water flow rate, and bath water 134 that circulates bath water 134 in bathtub 133 and is heated to hot water by a burner Exchanger 111, return passage 113 through which bathtub water 134 flows from bathtub 133 to bath heat exchanger 111, water level sensor 114 that detects the level of bathtub water 134, circulation pump 132 that circulates bathtub water 134, and bathtub Bath sensor 109 for detecting the temperature of water 134, three-way valve 115 for switching between hot water supply and bath passage, and bath heat exchanger 111 and bypass The bypass three-way valve 122 for switching the passage 131, the hot water solenoid valve 120 and the edge cut valve 121 provided in the passage connecting the hot water outlet and the return passage 113, and the bath heat exchanger 111 and the bypass passage 131 are joined together. An upper forward passage 123 and a lower forward passage 128 provided on the downstream side from the point, a drainage three-way valve 124 provided in the upper forward passage 123, and drainage provided on the downstream side of the drainage three-way valve 124, respectively. A filter tank 127 that also serves as a port 130, a filter medium 125, an aluminum anode 126, and a stainless steel cathode; The forward passage 112 through which the bathtub water 134 flows to the bathtub 133 and the bathtub water 134 of the bathtub 133 are connected to the three-way valve 11. A bath water heater provided with a return passage 113 to flow to.
[0004]
When the circulation pump 132 is operated, the bathtub water 134 returns to the return passage 113, the three-way valve 115, the circulation pump 132, and the bathtub water 134 when the circulation water is lower than the set temperature. Switching to the exchanger 111 side, passing through the upper going-out passage 123, switching the drainage three-way valve 124 to the filtration tank 127 side, and aluminum ions from the aluminum anode 126 (energized between the stainless steel cathode) disposed in the filtration tank 127 Aluminum hydroxide that elutes and aggregates the dirt component of the bath water 134 is generated, and the aluminum hydroxide aggregates the fouling component to form a floc, and an agglomerated layer is formed on the surface portion of the filter medium 125. As a layer, a fine filter medium layer is formed, and fine dirt components can be purified. Purifying the Rei switches the circulation way valve 129 to the forward passage 112 side which is provided on the downstream side of filtration layer 127, returns the forward path 112 as bath 132.
[0005]
On the other hand, when the bath water 134 is higher than the set temperature or when it is not necessary to heat the bath heat exchanger 111, the bypass three-way valve 131 is switched to the bypass passage 131 side, the upper forward passage 123, the drain three-way valve 124, and filtration. In the tank 127, the purification and circulation three-way valve 129 and the forward passage 112 are returned to the bathtub 132.
[0006]
As a matter of course, the switching of the various valves basically starts the circulation pump 132 after completion of the switching of the various valves by a control unit (not shown) when a purification signal is received. In addition, aluminum ions from the aluminum anode are eluted at the same time as the purification signal or automatically at a set time, and the bath water is purified by the aggregated layer on the surface of the filter medium 125.
[0007]
[Problems to be solved by the invention]
However, when energization is performed under the coagulation control, aluminum ions are eluted from the aluminum anode, while naturally oxygen gas is generated from the aluminum anode and hydrogen gas is generated from the stainless steel cathode, and stays in the upper part of the filtration tank 127. The amount of theoretically generated gas is determined by the energization conditions (energization current x energization time). If the sum of the energization conditions and energization current x energization time is small, the amount of staying gas is small and theoretical energization is possible. There are few agglomeration tanks, and purification performance becomes insufficient. In particular, when the sum of energization current x energization time is large, the purification performance is improved, but the amount of staying gas increases and theoretical energization is possible, but the upper part of the aluminum anode and stainless steel cathode is a gas space layer, for example, an electrode. Since it is not completely immersed in water, the current density is increased, and the electrolysis voltage is significantly increased, the upper limit voltage of a general DC constant current circuit must be significantly increased. It is very uneconomical because the power transformer that constitutes the power supply must be large and an expensive circuit configuration is required. Furthermore, when the gas space layer becomes larger, the gas flows into gas bubbles due to the water flow from the upper part of the filtration tank, the gas bubbles reach the surface of the filter medium, destroy the aggregated layer formed on the surface part of the filter medium, and purify it. Performance is significantly reduced.
[0008]
In addition, when water is passed through the purification circuit in the energized state after the degassing control, the aluminum ions are eluted, but the aluminum hydroxide serving as a flocculant is formed on the surface of the aluminum anode and is in an electrically coupled state. The present inventors have found a new problem that it is difficult to contribute to the formation of a 100% agglomerated layer on the surface portion of the filter medium because it is difficult to detach from the aluminum anode even when water is passed.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the first means of the present invention includes a heating unit that heats water and bathtub water to warm water, a feed water temperature detection unit that detects a feed water temperature provided in a feed water circuit, and a flow rate that detects a feed water flow rate. A detection unit, a hot water temperature detection unit for detecting a hot water temperature provided in the hot water supply circuit, a hot water amount control unit for controlling the hot water flow rate, a hot water supply valve unit for supplying hot water to the bathtub water circulation circuit, and hot water supply upstream of the hot water supply valve unit and A water flow detector for detecting the flow of bathtub water, a circulation pump for circulating bathtub water in the bathtub water circulation circuit, and a circuit configuration of a circulation circuit, a purification circuit, and a drain circuit as a bathtub water circulation circuit, and a part of the purification circuit A filter tank having an aluminum anode and a corrosion-resistant metal cathode at the top and a filter medium at the bottom, a switching valve A for switching the purification circuit and the circulation circuit downstream of the filter tank, a circulation pump, A switching valve B that opens and closes the bathtub water circulation circuit between the hot water valve portion, a switching valve C that switches between the purification circuit and the circulation circuit, and a switching valve D that opens and closes the drain circuit are provided between the hot water supply valve portion and the filtration tank. In the configuration, as agglomeration control, while repeatedly controlling energization and non-energization, (a) as a means for discharging the generated gas generated when energizing the aluminum anode and the corrosion-resistant metal cathode from the filtration tank, Switching valve A and switching valve B are switched to switching valve C and switching valve D to the venting circuit, and then the venting control is performed to pass water through the venting circuit for a certain period of time. A, switching valve B, switching valve C and switching valve D are switched to the purification circuit, and then water is passed through the purification circuit for a certain period of time to provide a control means for repeatedly fixing the flocculant on the surface of the filter medium. Is.
[0010]
According to the first means described above, first, as agglomeration control, the energization and non-energization are repeatedly controlled, and at the time of de-energization, (a) the generated gas generated when the aluminum anode and the corrosion-resistant metal cathode are energized is filtered. As a means for discharging more, the switching valve A and switching valve B are switched to the degassing circuit after switching the switching valve C and the switching valve D, and then the deaeration control is performed to pass water through the degassing circuit for a certain period of time. When the generated gas generated on the surface of the corrosion-resistant metal cathode is raised upward and desorbed from the electrode surface, since there is no generated gas at the next energization, the electrolysis voltage can be started from a low state. And by degassing water at the time of the said deenergization, since it can be made to flow in the state made into sufficient residence gas amount, residence gas can be discharged | emitted more reliably.
[0011]
Then, (b) as the purifying means, after switching the switching valve A and switching valve B to the switching circuit C and switching valve D to the purification circuit, water is passed through the purification circuit for a certain period of time to remove the flocculant. By repeating the immobilization means on the surface of the filter, the flocculant composed of aluminum hydroxide that has eluted and reacted due to non-energization will pass through the water when energized and try to immobilize it on the surface of the filter medium with the purification circuit. Since the aluminum hydroxide is in an electrically coupled state with the aluminum anode for energization, it cannot be sufficiently desorbed by the water passing force, so a stable aggregate layer is formed on the surface of the filter medium in a short time. Can not do it. Therefore, when water is passed through without energization, aluminum hydroxide loses its electrical coupling state with the aluminum anode and is in a state where it is easily detached, and when water is passed through, the aggregated layer is stable on the surface of the filter medium in a short time. Can be formed.
[0012]
By implementing the control means detailed above, effective degassing and a stable coagulation layer are formed, so that the coagulant generated during the set energization time can be effectively used 100%, and the stain component of the bath water can be used. Can be purified and cleaned more reliably.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The first embodiment of the present invention includes a heating unit that heats feed water and bathtub water to warm water, a feed water temperature detection unit that detects a feed water temperature provided in a feed water circuit, a flow rate detection unit that detects a feed water flow rate, and a hot water supply circuit. A hot water temperature detector that detects the hot water temperature, a hot water amount controller that controls the hot water flow rate, a hot water valve that supplies hot water to the bathtub water circulation circuit, and a flow of hot water and bathtub water upstream of the hot water valve. A water flow detector, a circulation pump that circulates bathtub water in the bathtub water circulation circuit, and a circuit configuration of a circulation circuit, a purification circuit, and a drain circuit as a bathtub water circulation circuit, and an aluminum anode and corrosion resistance on a part of the purification circuit A water bath provided between a filtration tank provided with a metal cathode at the counter electrode and a filter medium disposed at the lower part, a switching valve A for switching the purification circuit and the circulation circuit downstream of the filtration tank, and the circulation pump and the hot water supply valve section In a configuration in which a switching valve B that opens and closes the ring circuit, a switching valve C that switches between the purification circuit and the circulation circuit, and a switching valve D that opens and closes the drain circuit between the hot water supply valve unit and the filtration tank, As a means for repeatedly controlling energization and non-energization, and (a) discharging the generated gas generated when the aluminum anode and the corrosion-resistant metal cathode are energized from the filtration tank, , After switching the switching valve C and switching valve D to the degassing circuit, degassing control for passing water through the degassing circuit for a predetermined time, and then (b) switching the switching valve A and the switching valve B as purification means After switching the valve C and the switching valve D to the purification circuit, there is provided a control means for allowing the flocculant to pass through the purification circuit for a certain period of time and repeating the immobilization control on the surface portion of the filter medium.
[0014]
And by energizing the aluminum electrode and the corrosion-resistant metal cathode, the generated gas (oxygen gas, hydrogen gas) stays in the upper part of the filtration tank. Water and degassing the stagnant gas, and by fixing the flocculant composed of aluminum hydroxide produced at the aluminum electrode as a flocculent layer on the surface of the filter medium, a stable flocculant is produced, And it is effectively formed as a cohesive layer on the surface of the filter medium, and the dirt component of the bath water can be cleanly filtered and purified.
[0015]
The second embodiment of the present invention has a control means for allowing water to flow before energizing the aluminum anode and the corrosion-resistant metal cathode. And before energization, by passing water and degassing the staying gas (product gas, dissolved air separation gas and air gas), the staying gas can be always eliminated, and energization, that is, the electrolysis voltage can be started from a low state.
[0016]
3rd Embodiment of this invention has a control means which heats water supply water at the time of the hot water supply valve part opening. And by carrying out heating water flow, the residence gas in a filtration tank is heated by heating water flow, gas expand | swells easily by volume expansion | swelling, and a degassing time can be shortened.
[0017]
4th Embodiment of this invention has a control means to heat feed water to at least 60 degrees C or less. Moreover, when high-temperature water heated to 60 ° C. or higher is passed, the aggregated layer formed on the surface portion of the filter medium is destroyed and the purification performance deteriorates. Considering the above, it is desirable that the temperature be 60 ° C. or lower.
[0018]
【Example】
Hereinafter, a purification apparatus according to an embodiment of the present invention will be described with reference to the drawings.
[0019]
Example 1
1 is a schematic configuration of the purification apparatus, FIG. 2A is a configuration of a degassing circuit, FIG. 2B is a configuration of a coagulant immobilization circuit, FIG. 3 is a schematic flowchart of degassing and immobilization control of the generated gas, and FIG. Shows schematic time charts of degassing control and coagulant fixing control, respectively.
[0020]
In FIG. 1, water passes from a water inlet through a feed water temperature detection unit 1 comprising a water temperature sensor 1 and a flow rate detection unit 2 comprising a water amount sensor, and the heat is absorbed by a heating unit 18 comprising a heat exchanger and a combustion burner. The water is discharged from a hot water outlet (unsigned) through a hot water supply temperature detection unit 3 including a control unit 4 and a hot water supply sensor.
[0021]
The bathtub water 20 includes a bath connection adapter 21 attached to the bathtub 19 by the circulation pump 7, a return passage 22, a bathtub water temperature detection unit 8 composed of a bath sensor, a water level detection unit 25 composed of a water level sensor, the circulation pump 7, two-way Switching valve B15 consisting of a valve, water flow detection part 6 consisting of a water flow switch, heating part 18, switching valve C16 consisting of a three-way valve, switching valve A14 consisting of a three-way valve, circulation in the bathtub water circulation circuit of the bath connection adapter 21 Cycle through the circuit. The bathtub water 20 includes a bath connection adapter 21 attached to the bathtub 19 by the circulation pump 7, a return passage 22, a bathtub water temperature detector 8 including a bath sensor, a circulation pump 7, a switching valve B 15 including a two-way valve, A water flow detector 6 comprising a switch, a heating unit 18, a switching valve C16 comprising a three-way valve, and a filter tank 12 provided with a filter medium 13 (alumina balls: particle diameter 0.3 to 0.5 mm), three-way It circulates in the purification circuit of the bathtub water circulation circuit of the switching valve A14 which consists of a valve, the going-out passage 23, and the bath connection adapter 21.
[0022]
On the other hand, when the hot water supply to the bathtub 19 is opened by the hot water supply valve part 5 consisting of a water pouring valve, the water passes through the flow rate detection part 2 consisting of a water temperature sensor 1 and a water quantity sensor from the water inlet, Heat is absorbed by a heating source 18 including a heat exchanger and a combustion burner, and passes through a hot water supply amount control unit 4, a hot water supply temperature detection unit 3 including a hot water supply sensor, and a hot water supply valve unit 5. That is, when the switching valve B15 composed of a two-way valve is controlled to open, as a two-circuit hot water supply, the circulation pump 7, the return passage 22 and the heating unit 18, the switching valve C, the circulation circuit 9, and the forward passage 23 are respectively passed to the bathtub 19. Hot water is poured from the attached bath connection adapter 21. On the other hand, when the switching valve B15 consisting of a two-way valve is closed and controlled, the bath connection adapter 21 attached to the bathtub 19 passes through the heating section 18, the switching valve C16, the circulation circuit 9, and the forward passage 23 as one-circuit hot water supply. Hot water is poured. Although not described in detail in the present invention, the sign is omitted particularly in the case of full-automatic operation, but the water level sensor 25 for detecting the hot water level (the amount of hot water) is provided between the return passage 22 and the circulation pump 7 by the water level sensor 25. It is used when water 20 is accurately applied when hot water is added or automatically added.
[0023]
On the other hand, the filter tank 12 includes a filter medium 13 made of the above-described granular alumina balls (not shown, but is filled in the upper part of the filter bed holding the filter medium 13), and the filter medium 13. A fixed space is provided in the upper part, and the cylindrical aluminum anode 26 and the cylindrical stainless steel cathode 27 are provided on the outer periphery of the aluminum anode 26 as a corrosion-resistant metal cathode on the counter electrode.
[0024]
2 (a), FIG. 3 and FIG. 4, first, the degassing water passing configuration and control for passing water using the bathtub water 20 are switched to various types by manually turning on the purification SW of the remote control 24. The valves A, B, C, and D are switched to the purification circuit, the circulation pump 7 is activated, the bathtub water 20 circulates through the purification circuit, and the coagulation energization is started. Then, when the coagulation energization elapses for a certain period of time, the circulation pump stops and the various switching valves A, B, C, D are switched to the gas vent circuit. That is, the switching valve B15 provided in a part of the return circuit 22 of the bathtub water 20 is switched to “open” and switched to a circulating water circuit through which the bathtub water 20 circulates. Further, the switching valve A14 provided at the lower part of the filtration tank 12 is switched to a “closed” circuit so as to eliminate water flow from the filtration tank 12. Further, the switching valve C16 for switching between the purification circuit 10 side and the circulation circuit 9 side is switched to the purification circuit 10 side. Further, the switching valve D17 for switching from the filtration tank 12 to the drain circuit 11 side is switched to the drain circuit 11 side. What is important here is that the switching valve A14 provided in the lower part of the filter medium tank 12 must be switched to the "closed" circuit, but after switching the above-mentioned various switching valves to the gas venting circuit, the circulation pump 7 is kept constant. Operate for hours. If the switching valve A14 provided at the lower part of the filtration tank 12 is “open”, the water passed from the purification circuit 10 provided at the upper part of the filtration tank 12 passes through the filtration tank 12 and passes through the filtration tank 12. The stagnant gas 28 staying at the top of the gas just flows downstream, and the gas rises as soon as it overcomes the flow velocity. Degassing cannot be performed only by repeating the above phenomenon. On the other hand, when the switching valve A14 provided at the lower part of the filtration tank 12 of the present invention is passed through “closed”, a part of the water flowed in from the purification circuit 10 provided at the upper part of the filtration tank 12, Since there is no flow to the lower part, the inside of the filtration tank 12 becomes full. Naturally, the staying gas 28 at the upper part of the filtration tank 12 is pushed out by the suction water and flows out to the drain circuit 11 side. The inventors have ascertained why the stagnant gas 28 is discharged. That is, when water flows from the purification circuit 10 to the drain circuit 11 side, the suction port 29 at the upper part of the filtration tank 12 is in a negative pressure state due to the water flow, and the accumulated gas 28 at the upper part of the filtration tank 12 is mixed into the water flow and discharged. Is done. This phenomenon has the same effect as an ejector, which is a phenomenon that a water flow sucks air. When the staying gas 28 is discharged, a part of the water flows from the suction port 29, and the filtration tank 12 It works with the direction that the inside becomes full of water. In the figure, a black triangle means a “closed” circuit.
[0025]
As shown in FIGS. 2B, 3 and 4, the circulation pump 7 is operated again in the degassing circuit, degassing water is passed for a certain period of time, and when the set time has elapsed, the circulation pump 7 is stopped and various switching is performed again. The valves A, B, C, and D are switched to the purification circuit, and the flocculant is fixed and operated for a predetermined time.
[0026]
Although not shown, when the hot water supply valve unit 5 is used to pass water, the switching valve B15 is a “closed” circuit, the switching valves A14, C16, D17 described above are degassing circuits, and the hot water supply valve unit 5 is By “open” and allowing water to flow for a certain period of time, the staying gas 28 staying in the upper part of the filtration tank 12 can be discharged by the same action. For fixing the flocculant, it is possible to arbitrarily set whether the hot water supply valve unit 5 is “open” and water is passed for a certain period of time, or whether the circulation pump 7 is operated and water is passed for a certain period of time.
[0027]
The fixed time for controlling the water flow described above means the degassing time, and is determined by the amount of generated gas and the water flow amount according to the electrolysis energization condition. For example, the filtration tank 12 has an inner diameter of 100 mm, a height of 250 mm, a filtration tank 13 having a granule diameter of 0.3 to 0.5 mm, a filtration layer of 60 mm, an aluminum anode 26 shape, an outer diameter of 75 mm, a length of 100 mm, A hole shape with an inner diameter φ40 and a stainless cathode 27 shape, an inner diameter φ90, a length of 100 mm, a plate thickness of 0.6 mm, the upper surface of the filtration tank 12, the aluminum anode 26, and the stainless cathode 27 are flush with each other. When the spatial distance between the upper surface of 12 and the upper surface of the electrode is 15 mm, (1) energization current: 350 mA, (2) energization time: the amount of generated gas generated in 30 minutes is about 120 cm. ^Three (Detailed calculations are omitted ... Coulomb's law), (3) Water flow rate: 6 liters / minute, (4) Degassing time: 35 seconds or more are required, preferably 40-60 seconds is the optimum condition Met.
[0028]
Further, the fixed time for controlling the fixed water flow is determined by the electrolysis energization conditions and the water flow amount as described above, but (5) the fixed water flow time: 20 seconds or more are required, preferably 30 to 120 seconds. It was the optimum condition.
[0029]
And when the degree of dirt of bathtub water 20 is 2.0 degrees of turbidity, the electrolysis for making said 2.0 degrees of turbidity 1.0 degrees (turbidity which we feel clean by visual evaluation) The energization conditions are: (1) energization current: 350 mA, (2) total energization time: 60 minutes are required, and preferable energization and non-energization conditions are (a) the circulation flow condition of the bath water 20: purification at 6 liters / min. In this case, in the experiment verification by the present inventors, the energization time is 5 to 20 minutes and the non-energization time is 1 to 3 minutes. The amount of generated gas generated in a maximum of 20 minutes under the above conditions is about 80 cm. ^Three And about 30 minutes (about 120cm ^Three ), The staying gas 28 does not reach the upper surface of the electrode, and stable electrolysis is possible without being affected by the staying gas 28. If water is passed through as it is, the upper part of the electrode will not be immersed in water, and naturally the electrolysis voltage will rise, in other words, the current density will increase, greatly affecting the energizing constant current circuit. As an example, the maximum voltage of the energizing constant current circuit is preferably 30 V or less when used in a bathing water circuit. When the electrolysis voltage is 30 V or more, the set energization current decreases in the constant current circuit. The decrease in the energization current means that the necessary flocculant is generated and that the aggregated layer formed on the surface of the filter medium 13 is reduced and the purification function is reduced, so that the staying gas 28 reaches the upper part of the electrode. Before the operation, the stagnant gas 28 becomes a degassing circuit and is a necessary condition for degassing water.
[0030]
As described above, energization and non-energization are repeated within the set energization time, and at the time of energization, a constant amount of flocculant is stably generated between the electrodes, and this flocculant is being generated. Flocking (a phenomenon in which the flocculant and the flocculant are combined to form slightly larger aggregated particles), that is, a reaction time for flocking is required. By using the flocculent flocculant, the filter agent 13 and the filter agent 13 It accumulates efficiently in the gaps (spaces), and a dense aggregate layer optimal for purification is formed on the surface. If water is passed through the purification circuit 10 while energized, the reaction time for flocking is small, and the flocculant flocs over the entire 13 layers of the filter medium. Becomes rough and the purification effect is slightly insufficient. Therefore, non-water energization is a very effective control means.
[0031]
In the figure, as energization electrolysis control, energization and de-energization are repeatedly controlled, and as the de-energization control, various switching valves are switched to the de-gas circuit, and then the circulating pump is operated to pass water, or Water is supplied with the hot water supply valve portion open.
[0032]
By degassing and passing water without being energized, the generated gas is desorbed from the surface of the electrode when deenergized, and the accumulated gas can be reliably discharged by passing water by allowing the product gas to rise and stay at the upper part of the filtration tank. Further, when the current is not energized, the generated gas is desorbed from the electrode surface, so that the local voltage due to the gas partial pressure (gas concentration) is eliminated, and the current can be energized with a stable voltage, that is, a more stable constant current. .
[0033]
(Example 2)
The control method of energization electrolysis control and degassing control is shown in the time chart of FIG.
[0034]
In the figure, by performing degassing control before energization electrolysis control, air that is mixed and retained in the bath water circulation circuit under various conditions, for example, gas generated from bathing agent, adsorbed air, etc. operates the circulation pump ( Purified or boiled), the retained air tends to stay in the upper part of the filtration tank 12, and if this retained air increases, as described in detail in Example 1, it will adversely affect the energization. By controlling the degassing, a coherent layer can be formed on the surface portion of the filter medium that is stable and necessary for purification.
[0035]
As degassing control before conducting electrolysis control, it is within the scope of the present invention because the degassing effect is more reliably increased by repeatedly controlling multiple times, that is, repeatedly controlling water flow and degassing.
[0036]
(Example 3)
FIG. 6 shows a flowchart for controlling the heating of water flow during the degassing control.
[0037]
At the time of degassing control, hot water is heated by heating water through the heating unit 18 of the purifying apparatus in FIG. 1 (burning with a burner when the heat source is gas and direct heating when the heat source is electric or with a heat exchanger). As a result, the viscosity becomes low (small) and is easily sucked into the filtration tank 12, and the staying gas is heated and expanded due to the warm water, so that it is easy to float and the degassing time can be shortened. Furthermore, the hot water temperature of the filtration tank 12 rises and the electrolysis voltage is lowered, and it works in the direction of improving to stably contribute to the generation of the flocculant.
[0038]
Example 4
FIG. 7 shows a comparison between the degassing time and the purification performance (turbidity) during the water flow heating control.
[0039]
In the figure, the water flow temperature was changed to (1) 23 ° C, (2) 35 ° C, (3) 55 ° C, (4) 60 ° C, (5) 70 ° C. The degassing time is shortened. As described in detail in the fifth embodiment, this is because the viscosity becomes low (small), is easily sucked into the filtration tank 12, and the staying gas is heated to expand its volume and float. On the other hand, when the water flow temperature is high, especially when the temperature is high, the aggregated layer formed on the surface portion of the filter medium 13 is broken, that is, the binding force of the coagulant is reduced, and the function of the aggregated layer (the pores of the aggregated layer are It is desirable to take into account the degassing time and the coagulation function because the purification performance deteriorates due to a change in the size and the fine dirt component in the bath water 20 such as physical filtration performance of general bacteria is significantly deteriorated). The water flow temperature is in the range of 35-60 ° C, and the water flow temperature is more preferably in the range of 35-55 ° C.
[0040]
【The invention's effect】
As is clear from the above description, the purification device of the present invention has the following effects.
[0041]
The degassing and coagulant fixing methods are as follows. First, when no power is applied, various switching valves are switched to the degassing circuit side, then degassing water is passed for a certain period of time, and then the various switching valves are switched to the purification circuit side, and then fixed. By immobilizing the time flocculant, the accumulated gas staying in the upper part of the filtration tank is discharged to stabilize the electrolysis voltage during energization and to produce a certain amount of the flocculant with certainty. By forming an agglomerated layer densely on the surface portion of the water, the dirt component of the bath water can be reliably purified and cleaned by the filter medium layer.
[0042]
Further, by degassing water before energization, air mixed in the circulating water circuit can be discharged, the electrolysis voltage can be further stabilized, and a certain amount of flocculant can be reliably generated.
[0043]
Moreover, the degassing time can be shortened by heating and passing water.
And by making heating water flow temperature 60 degrees C or less, it does not destroy the aggregated layer formed in the surface part of a filter medium, and can maintain the stable purification | cleaning performance. Although the filter medium of an Example is an alumina ball filter medium, all are applicable to granular filter media, such as a glass bead filter medium and a beach sand filter medium. On the other hand, although not described in detail in the examples, the degassing and flocculant of the purifying apparatus of the present invention is also applied to cartridge filters, that is, fiber filters, thread wound filters, glass fiber filters, stainless fiber filters, porous ceramic filters, and the like. The immobilization control method is effective.
[0044]
In the embodiment, the manual operation with the remote controller has been described. However, when the hot water is automatically supplied to the bathtub by the automatic control means, for example, the purification device, the hot water or the water level sensor, the water level switch, etc. It is determined that there is a water level in the bathtub based on the preset water level amount. As a more reliable method, when the water level set by the user and the set hot water temperature are determined, an automatic control method for energization control and degassing control is also included in the present invention. It is a range. Furthermore, when the energization control is completed, even if the purification SW is turned “ON” next, unless the agglomerated layer is destroyed by drainage, backwashing or the like, the energization control is not performed, and only the purification operation is controlled. Is also within the scope of the present invention.
[0045]
Furthermore, in the present invention, the stainless steel cathode has been described as the corrosion-resistant metal cathode. However, the corrosion-resistant metal is an ordinary bath water in which a component that makes the bath water clearly contaminated by rust or the like (the bath water discolors, etc.) is eluted. In addition, for example, pure plates such as aluminum, copper, nickel, titanium, platinum, gold, and silver, and iron alloys, aluminum alloys, copper alloys, etc. can be used. However, in consideration of economy and rust, austenitic stainless steel, aluminum Is a preferred cathode material.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a purification device of the present invention.
FIG. 2A is a configuration diagram of a degassing circuit in the purification apparatus according to the first embodiment of the present invention.
(B) Configuration diagram of the coagulant fixing circuit in the apparatus
FIG. 3 is a flowchart of the apparatus.
FIG. 4 is a time chart of the apparatus.
FIG. 5 is a time chart of the purification apparatus according to the second embodiment of the present invention.
FIG. 6 is a flowchart of degassing and heating control in the purification apparatus according to the third embodiment of the present invention.
FIG. 7 is a comparative diagram showing the degassing time and purification performance in the purification apparatus of Example 4 of the present invention.
FIG. 8 is a block diagram of a conventional bath water heater
[Explanation of symbols]
1 Feed water temperature detector
2 Flow rate detector
3 Hot water temperature detector
4 Hot water supply volume control unit
5 Hot water supply valve
6 Water flow detector
7,132 Circulation pump
8 Bath water temperature detector
9 Circulation circuit
10 Purification circuit
11 Drain circuit
12,127 Filtration tank
13,125 Filter media
14 Switching valve A
15 Switching valve B
16 Switching valve C
17 Switching valve D
18 Heating unit
19,133 Bathtub
20,134 Bathtub water
21 Bath connection adapter
22 Return passage
23 Outbound passage
24 remote control
25 Water level detector
26,126 Aluminum anode
27 Stainless steel cathode
28 Stagnant gas
29 Suction port

Claims (4)

A heating unit that heats water and bathtub water to hot water, a feed water temperature detection unit that detects the feed water temperature provided in the feed water circuit, a flow rate detection unit that detects the feed water flow rate, and a hot water temperature that detects the hot water temperature provided in the hot water circuit A detection unit and a hot water supply amount control unit for controlling the hot water flow rate, a hot water supply valve unit for supplying hot water to the bathtub water circulation circuit, a water flow detection unit for detecting the flow of hot water and bathtub water upstream of the hot water valve unit, and the bathtub water circulation circuit A circulation pump that circulates bathtub water and a circuit configuration of a circulation circuit, a purification circuit, and a drain circuit as a bathtub water circulation circuit are provided, and an aluminum anode and a corrosion-resistant metal cathode are provided at the upper part of the purification circuit, and at the lower part. A filter tank provided with a filter medium, a switching valve A for switching the purification circuit and the circulation circuit downstream of the filtration tank, a switching valve B for opening and closing the bathtub water circulation circuit between the circulation pump and the hot water supply valve unit, In the configuration in which the switching valve C that switches between the purification circuit and the circulation circuit and the switching valve D that opens and closes the drain circuit are respectively disposed between the valve section and the filtration tank, as agglomeration control, energization and de-energization are repeatedly controlled, At the time of non-energization, (a) As a means for discharging the generated gas generated when the aluminum anode and the corrosion-resistant metal cathode are energized from the filtration tank, the switching valve A, the switching valve B, the switching valve C, and the switching valve D are gasses. After switching to the venting circuit, the venting control for passing water through the venting circuit for a certain period of time, and (b) as the purifying means, the switching valve A and the switching valve B, and the switching valve C and the switching valve D as the purifying circuit. After the switching, the purification device is configured such that the flocculant is passed through the purification circuit for a certain period of time, and the fixing control is repeatedly controlled on the surface portion of the filter medium. 2. The purification apparatus according to claim 1, wherein water is passed before the aluminum anode and the corrosion-resistant metal cathode are energized. The purification device according to claim 1, wherein the water supply is heated and passed when the hot water supply valve portion is opened. The purification apparatus according to claim 3, wherein the feed water is heated and controlled to at least 60 ° C or less.

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