JP2000130842A - Purifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cleanly purify bathtub water by purging retained gas, always electrolytically decomposing by maintaining a current density constant, forming an aggregate layer having a stable preset aggregate amount on the surface of a filtering material, and aggregating and filtering a stain component of the water. SOLUTION: The method for controlling degassing of the purifier comprises the steps of switching various transfer valves to a degassing circuit, then operating a circulating pump 7, passing bathtub water 20 or opening a water heating valve 5 to pass the water, exhausting gas retained in an upper part of a filtering tank 12, stabilizing electrolytic decomposition of aluminum anode 25 and corrosion resistant metal cathode 27 arranged in the tank 12, and effectively generating the coagulant (aluminum hydroxide) from the anode 26. Thus, the aggregate layer is formed on a surface of a filtering material 13, and the water 20 is always clearly cleaned by the layer and the material 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a purifier capable of purifying bathtub water more clearly.

[0002]

2. Description of the Related Art FIG. 9 shows a bath water heater disclosed by the present inventors as a conventional representative technology.

[0003] In Fig. 9, reference numeral 101 denotes an overall configuration of a bath water heater, a hot water supply heat exchanger 103 for heating water to a hot water by a burner, a water temperature sensor 102 provided in a water supply passage and detecting a water supply temperature, and a water supply. A water flow rate sensor 101 for detecting a flow rate, a hot water supply sensor 104 for detecting a hot water temperature, a hot water supply quantity control valve 105 for controlling a hot water flow rate, and a bathtub water 134 of a bathtub 133 circulated through a hot water path and heated to hot water by a burner. Bath heat exchanger 111, a return passage 113 through which bath water 134 flows from bath 133 to bath heat exchanger 111, a water level sensor 114 for detecting the water level of bath water 134, and a circulation pump 13 for circulating bath water 134.
2 and a bath sensor 109 for detecting the temperature of the bath water 134
A three-way valve 115 for switching between hot water supply and a bath passage, a three-way bypass valve 122 for switching between a bath heat exchanger 111 and a bypass passage 131, a hot water supply passage and a return passage 11
Hot water supply solenoid valves 12 provided in the passages connecting
0 and an edge cutoff valve 121; an upper outgoing passage 123 and a lower outgoing passage 128 provided on the downstream side from the junction of the bath heat exchanger 111 and the bypass passage 131, respectively;
Drainage three-way valve 124 provided in the upper going passage 123
And a drainage port 130 and a filtration tank 127 provided also on the downstream side of the drainage three-way valve 124 and also serving as an aluminum anode 126 and a stainless steel cathode,
A circulating three-way valve 129 provided at the junction of the filtration tank 127 and the lower going passage 128;
Passage 112 through which bathtub water 134 flows from bathtub 133 to bathtub 133
And a bath water heater provided with a return passage 113 through which bath water 134 of the bath 133 flows to the three-way valve 115.

[0004] The purifying mechanism of the bathtub water 134 is as follows.
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 13.
4 is lower than the set temperature, the bypass three-way valve 131 is switched to the bath heat exchanger 111 and the upper
, The drainage three-way valve 124 is switched to the filtration tank 127 side, and the aluminum anode 126 disposed in the filtration tank 127 is switched.
(Electricity is passed between the stainless steel cathode), aluminum ions are eluted, and aluminum hydroxide is generated to aggregate the dirt components of the bath water 134. The aluminum hydroxide aggregates and blocks the dirt components, and is filtered. An agglomerated layer is formed on the surface of the material 125, and the agglomerated layer forms a fine filter material layer, which makes it possible to purify even small dirt components. The circulation three-way valve 129 provided on the side is switched to the outgoing passage 112 side, and the bathtub 13 is passed through the outgoing passage 112.
Return to 2.

On the other hand, if the bath water 134 is higher than the set temperature or if it is not necessary to heat the bath heat exchanger 111, the bypass three-way valve 131 is switched to the bypass passage 131, and the upper going passage 123, the drainage three-way valve 124,
Purification by filtration tank 127, circulation three-way valve 129, outgoing passage 11
2 and return to the bathtub 132.

As a matter of course, the switching of the various valves is basically performed by the control unit (not shown) after the switching of the various valves is completed by the control unit (not shown) upon receiving the purification signal.
Activate 32. In addition, the aluminum ions from the aluminum anode are eluted by applying power automatically at the same time as the purification signal or at a set time, and the bath water is purified by the coagulation layer on the surface of the filter material 125.

[0007]

However, when electricity is supplied, while aluminum ions are eluted from the aluminum anode, oxygen gas is naturally generated from the aluminum anode and hydrogen gas is generated from the stainless steel cathode, and stays in the upper portion of the filtration tank 127. The amount of the theoretically generated gas of the staying gas is determined by the energizing conditions (the energizing current × the energizing time). When the sum of the energizing conditions and the energizing current × the energizing time is small, the amount of the staying gas is small and the theoretical energizing can be performed. In addition, there is little coagulation layer, and the purification performance becomes insufficient. In particular, when the sum of the energizing current × the energizing time is large, the purification performance is improved, but the accumulated gas increases and theoretical energization is possible, but the upper part of the aluminum anode and the stainless steel cathode is a gas space layer, for example, the electrode is Since it is not completely immersed in water, the current density becomes large, and the electrolytic voltage rises significantly, it is necessary to significantly increase the upper limit voltage of a general DC constant current circuit, and the constant current circuit of the control unit. It is very uneconomical to use a large power transformer and an expensive circuit configuration, and when the gas space layer is large, the gas flows from the upper part of the It has been found that a new problem has been found in that the gas bubbles reach the surface of the filter medium, break down the coagulated layer formed on the surface of the filter medium, and significantly reduce purification performance.

[0008]

In order to solve the above-mentioned problems, a first means of the present invention is to provide a heating unit for heating feed water and bathtub water to hot water, and a feed water temperature provided in a feed water circuit for detecting the feed water temperature. A detection unit and a flow detection unit that detects a flow rate of the supply water; a hot water supply temperature detection unit that is provided in a hot water supply circuit and detects a hot water temperature; a hot water supply amount control unit that controls a hot water supply flow amount; a hot water supply valve unit that supplies hot water to a bathtub water circulation circuit; A water flow detection unit for detecting the flow of hot water and bath water upstream of the hot water supply valve unit, a circulation pump for circulating bath water in the bath water circulation circuit, and a circulation circuit, a purification circuit as a bath water circulation circuit,
A drainage circuit configuration is provided.A part of the purification circuit is provided with an aluminum anode and a corrosion-resistant metal cathode at the top at the counter electrode, and a filtration tank is provided at the bottom, and a purification circuit is circulated downstream of the filtration tank. A switching valve A for switching a circuit, a switching valve B for opening and closing a bathtub water circulation circuit between a circulation pump and a hot water supply valve section, a switching valve C for switching between a hot water supply valve section and a filtration tank between a purification circuit and a circulation circuit, and a drainage circuit. , A switching valve A, a switching valve B, a switching valve C, and a switching valve D as means for discharging generated gas generated when the aluminum anode and the corrosion-resistant metal cathode are energized are discharged from the filtration tank. Switching valve D
Is switched to a degassing circuit, and then water is passed through the degassing circuit for a certain period of time to provide degassing control means.

According to the first means, the switching valve A, the switching valve B, the switching valve C, and the switching valve D are switched to the gas venting circuit, and then water is passed through the gas venting circuit for a certain period of time. The retained gas of oxygen gas and hydrogen gas generated by conducting electrolysis to the upper part is sucked and passed through the upper port of the filtration tank, and the retained gas is expelled (gas purge) to fill the upper part of the filtration tank with water. Electrolysis can be performed, a current density is always supplied at a constant current density, and an aggregation layer having a predetermined aggregation amount and a stable aggregation amount can be formed on the surface of the filter medium while maintaining a low electrolysis voltage. Due to the formation of the stable coagulation layer, the dirt component of the bathtub water can be coagulated and filtered to clean the bathtub water.

[0010] In addition, when the electrolytic voltage becomes low, generally when a part of the bathtub water circulation circuit is energized, the DC electrolytic voltage is preferably 30 V or less. Can be used, the installation space for the control unit can be reduced, and a purification device having both safety and economy can be configured.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention comprises a heating section for heating feed water and bathtub water to hot water, a feed water temperature detecting section provided in a feed water circuit for detecting feed water temperature, and a flow rate for detecting feed water flow rate. A detecting unit, a hot water temperature detecting unit provided in the hot water circuit for detecting hot water temperature and a hot water amount control unit for controlling the hot water flow rate, a hot water valve unit for supplying hot water to the bathtub water circulation circuit, and hot water upstream of the hot water valve unit; A water flow detection unit for detecting the flow of bath water, a circulation pump for circulating bath water in the bath water circulation circuit, and a circuit configuration of a circulation circuit, a purification circuit, and a drain circuit as the bath water circulation circuit, and a part of the purification circuit. The upper part is provided with an aluminum anode and a corrosion-resistant metal cathode at the opposite electrode, the lower part is provided with a filter medium, the switching valve A for switching between the purification circuit and the circulation circuit downstream of the filtration tank, the circulation pump and A switching valve B for opening and closing the bathtub water circulation circuit is provided between the valve unit, a switching valve C for switching between the purification circuit and the circulation circuit between the hot water supply valve unit and the filtration tank, and a switching valve D for opening and closing the drainage circuit. In the structure, a switching valve A and a switching valve B are provided as means for discharging generated gas generated when current is supplied to the aluminum anode and the corrosion-resistant metal cathode from the filtration tank.
After switching the switching valves C and D to the degassing circuit, water is passed through the degassing circuit for a certain period of time to have degassing control means.

[0012] Then, when a current is supplied to the aluminum electrode and the corrosion-resistant metal cathode, generated gas (oxygen gas,
Hydrogen gas) is passed through a suction port provided in the upper part of the filtration tank through a stagnant gas that stagnates in the upper part of the filtration tank, and degass the stagnant gas, whereby a stable flocculant is generated, and Formed as a cohesive layer on the surface, it is possible to cleanly filter and purify dirt components of bath water.

The second embodiment of the present invention has a water flow control means for flowing water of a bathtub by a circulation pump or water supply by opening a hot water supply valve as water flow means.

[0014] Circulation of the bathtub water by the circulating pump allows gas to be removed by simple operation. On the other hand, although it takes a little time to perform the set control of the hot water supply valve unit and the water amount control unit, the gas can be surely vented with the water amount set in advance.

The third embodiment of the present invention has a control means for allowing water to flow a plurality of times within the set energizing time of the aluminum anode and the corrosion-resistant metal cathode.

The accumulated gas generated during the set energizing time is separated into a plurality of times and discharged through the water, so that the amount of the accumulated gas does not affect the electrolysis voltage, that is, the amount of the accumulated gas can be kept at a stable current density and the minimum amount for maintaining a low voltage. By fixing, the aggregate layer can be more reliably formed on the surface of the filter medium.

The fourth embodiment of the present invention has a control means for passing water to the aluminum anode and the corrosion-resistant metal cathode during the non-energization in the repetitive control of energization and non-energization.

First, by repeating the energization and the non-energization, the generated gas is raised to the upper part especially when the energization is not performed,
When desorbed from the electrode surface, at the next energization, there is no generated gas, so that the electrolysis voltage can be started from a low state, and by passing water when not energized, the stagnant gas can be more reliably discharged. .

The fifth embodiment of the present invention has a control means for passing water before energizing the aluminum anode and the corrosion-resistant metal cathode.

Before the energization, the accumulated gas (product gas, dissolved air separation gas and air gas) is degassed by passing water to eliminate the stagnant gas. it can.

The sixth embodiment of the present invention has a control means for heating and supplying water when the hot water supply valve is opened.

Then, by passing the water through heating, the gas retained in the filtration tank is heated by the water passing through the water, and the gas expands in volume and easily floats, so that the gas removing time can be shortened.

The seventh embodiment of the present invention has a control means for heating the feed water to at least 60 ° C. or less.

Further, when high-temperature water heated to 60 ° C. or more is passed through, the coagulated layer formed on the surface of the filter medium is destroyed and the purification performance is reduced. The temperature is preferably 60 ° C. or less in consideration of the degassing time.

[0025]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a purifying apparatus according to an embodiment of the present invention.

(Embodiment 1) FIG. 1 shows a schematic configuration of a purifying apparatus,
FIG. 2 is a schematic flowchart of the degassing control of the generated gas,
FIG. 3 is a schematic time chart of degassing control, and FIG. 4 shows a degassing circuit configuration.

In FIG. 1, water passes from a water inlet through a feed water temperature detecting section 1 comprising a water temperature sensor and a flow rate detecting section 2 comprising a water quantity sensor, and passes through a heating section 1 comprising a heat exchanger and a combustion burner.
The heat is absorbed at 8 and passes through a hot water supply amount control unit 4 and a hot water temperature detecting unit 3 including a hot water supply sensor, and is discharged from a hot water outlet (unsigned).

The bathtub water 20 is supplied to the bathtub 1 by the circulation pump 7.
Bath connection adapter 21 attached to 9, return passage 2
2, a bathtub water temperature detecting section 8 composed of a bath sensor, a water level detecting section 25 composed of a water level sensor, a circulation pump 7, a switching valve B15 composed of a two-way valve, a water flow detecting section 6 composed of a water flow switch 6, a heating section 18, and a three-way valve. , A switching valve A14 comprising a three-way valve, an outgoing passage 23, and a circulation circuit of a bathtub water circulation circuit of the bath connection adapter 21. 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 including a bath sensor, a circulation pump 7, a switching valve B <b> 15 including a two-way valve, and a water flow. A water flow detection unit 6 comprising a switch, a heating unit 18, a switching valve C16 comprising a three-way valve, a filtration tank 12 provided with a filtering material 13 (alumina ball: using a particle diameter of 0.3 to 0.5 mm), a three-way valve A switching valve A14 comprising a valve, an outgoing passage 23, and a purification circuit of a bathtub water circulation circuit of the bath connection adapter 21 are circulated.

On the other hand, when the hot water is supplied to the bathtub 19, the water is opened by opening the hot water supply valve section 5 composed of a pouring valve, and the water is supplied from the water inlet to a supplied water temperature detecting section 1 composed of a water temperature sensor and a flow rate detecting section 2 composed of a water quantity sensor. Source 1 consisting of a heat exchanger and a combustion burner
Heat is absorbed at 8, and the water passes through a hot water supply amount control unit 4, a hot water temperature detection unit 3 comprising a hot water supply sensor, and a hot water supply valve unit 5 to control hot water supply functions (details are omitted), that is, a switching valve B15 comprising a two-way valve. , The hot water is supplied from the bath connection adapter 21 attached to the bathtub 19 through the circulation pump 7, the return passage 22 and the heating unit 18, the switching valve C, the circulation circuit 9, and the outgoing passage 23. Is On the other hand, when the switching valve B15 composed of a two-way valve is controlled to be closed, the bath connection adapter 21 attached to the bathtub 19 passes through the heating unit 18, the switching valve C16, the circulation circuit 9, and the outgoing passage 23 as one-circuit hot water supply. Hot water is removed. In the present invention, although not described in detail, particularly in the case of fully automatic, reference numerals are omitted,
Between the return passage 22 and the circulation pump 7, the bathtub water 20 is detected by a water level sensor 25 for detecting a hot water level (amount of hot water).
Used for accurate hot watering and automatic hot water.

On the other hand, the filter tank 12 is provided with a filter medium 13 made of the above-mentioned granular alumina balls (illustration is omitted, but is filled in the upper part of a filter bed holding the filter medium 13) and the above-mentioned filter tank. A fixed space is provided in the upper part of the filtering material 13, and a cylindrical aluminum anode 26 is provided on the outer periphery of the aluminum anode 26, and a cylindrical stainless steel cathode 27 is provided on the outer periphery of the aluminum anode 26 as a counter electrode.

In FIG. 4, first, degassing control for passing water using the bathtub water 20 is performed by manually purifying S
When W is turned "ON", first, the various switching valves A, B, C, and D are switched to the purification circuit, the circulation pump 7 is operated, and the bathtub water 2 is turned on.
0 circulates in the purification circuit, and coagulation energization is started. Then, when a certain period of time has passed for the coagulation energization, the circulation pump is stopped, and the various switching valves A, B, C, and D are switched to the degassing 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 the switch is switched to the circulating water circuit in which the bathtub water 20 circulates. Further, the switching valve A14 provided at the lower portion of the filtration tank 12 is switched to a "closed" circuit so as to eliminate the flow of water from the filtration tank 12. Further, the switching valve C16 that switches between the purification circuit 10 side and the circulation circuit 9 side is switched to the purification circuit 10 side. Further, a switching valve D17 for switching from the filtration tank 12 to the drain circuit 11 side.
To the drain circuit 11 side. The important thing here is that
The point is that the switching valve A14 provided at the lower part of the filtration tank 12 is always switched to the "closed" circuit, and the water is vented.

After switching the various switching valves to the gas venting circuit, the circulation pump 7 is operated for a certain period of time. if,
When the switching valve A14 provided at the lower part of the filtration tank 12 flows in the "open" state, 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 the upper part of the filtration tank 12 The stagnated gas 28 that has stayed in the air just tries to flow downstream, and the gas overcomes the flow velocity and immediately floats. 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 according to the present invention is passed in a “closed” state, a part of the water flows from the purification circuit 10 provided at the upper part of the filtration tank 12, and
Since there is no flow to the lower part of the filter tank 12, the inside of the filter tank 12 is in a direction of being filled with water. Naturally, the retained gas 28 in the upper part of the filter tank 12 is pushed out by the suction water and flows out to the drain circuit 11 side. The present inventors have identified a phenomenon why the staying gas 28 is discharged. That is, when water is passed from the purification circuit 10 to the drain circuit 11 side, the water flow causes the suction port 29 at the upper part of the filtration tank 12 to be in a negative pressure state, and the stagnant 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 that of an ejector, which is a phenomenon in which a flowing water sucks air. When the stagnant gas 28 is discharged, a part of the flowing water flows in from a suction port 29 and the filtration tank 1
It works with the direction in which the inside of 2 becomes full. In the figure, a black triangle means a “closed” circuit.

Then, the circulating pump 7 is operated again in the degassing circuit, water is vented for a certain period of time, and after a lapse of a set time, the circulating pump 7 is stopped and the various switching valves A,
B, C, and D are switched to the purification circuit, and the purification operation is performed. Although not shown, when water is supplied using the hot water supply valve section 5,
The switching valve B15 is closed, and the switching valves A14 and C described above are used.
Reference numerals 16 and D17 denote degassing circuits. The hot water supply valve section 5 is opened and water is supplied for a certain period of time so that the filtration tank 12
The stay gas 29 staying in the upper part of the gas can be discharged by the same action.

The above-mentioned constant time for controlling the flow of water refers to the degassing time, which is determined by the amount of generated gas and the amount of flow of water under the electrolysis energizing conditions. For example, the size of the filtration tank 12 is 100 mm in inner diameter and 25 mm in height.
0 mm, granule diameter of filter medium 13 is 0.3 to 0.5 mm, filter layer 60 mm, aluminum anode 26 shape, hole diameter of outer diameter φ75 mm, length 100 mm, inner diameter φ40, stainless steel cathode 27 shape, inner diameter φ90, Length 100
mm, the plate thickness is 0.6 mm, the upper surface of the filtration tank 12 and the aluminum anode 26 and the stainless steel cathode 27 are on the same plane, and the spatial distance between the upper surface of the filtration tank 12 and the upper surface of the electrode is 15 mm. 1) Energizing current: 350 mA, (2)
Energization time: The amount of gas generated in 30 minutes is about 120 c
m ³ (Detailed calculation is omitted ... Coulomb's law),
(3) At a flow rate of 6 l / min, (4) degassing time: 35 seconds or more was required, and preferably 40 seconds was the optimal condition.

(Example 2) Although not described in detail in Example 1, when the turbidity of the bathtub water 20 is 2.0 degrees, the turbidity 2.0 degrees is changed to 1.0 degrees (the present invention). The electrolysis energizing conditions for making the turbidity that they feel clean by visual evaluation) are (1) energizing current: 350 mA, (2) energizing time: 60 minutes, (a)
The circulating flow condition of the bathtub water 20 can be purified at a rate of 6 l / min.
In the case of 0 cm ³ , the stagnant gas 29
When the current is passed, the upper part of the electrode is not immersed in water, so that the electrolytic voltage naturally increases, in other words, the current density increases, which greatly affects the current-carrying constant current circuit. As an example, the maximum voltage of the constant current circuit for energization is preferably 30 V or less when used in a bathing water circuit. Therefore, when a large amount of the stagnant gas is generated and the electrolysis voltage becomes 30 V or more, the maximum voltage becomes constant. In the current circuit, the set conduction current decreases. The decrease in the conduction current decreases the generation of the necessary coagulant and the amount of the coagulation layer formed on the surface of the filter medium 13 and the purification function is reduced, so that the accumulated gas does not reach the upper part of the electrode. Before that, it becomes an essential condition to make the staying gas into a degassing circuit and to vent and flow water.

Therefore, it is necessary to perform degassing and water flow control a plurality of times within the set energizing time. In the degassing and water flow control, the number of times of degassing varies depending on the electrolysis conditions, but the theoretical amount of retained gas is 10 to 100 cm. It is desirable to degas and pass water about ³ times. In the above-described filtration tank configuration, according to the experimental verification of the present inventors, (1) when the energizing current is 350 mA, the degassing water is surely discharged by degassing and passing water once every 10 to 20 minutes. Electricity can be supplied at a stable low voltage without increasing the electrolysis voltage, and the bathtub water purification performance can be stably maintained.

(Embodiment 3) A control method of the electrolysis control and the degassing control is shown in a flowchart of FIG. 5A and a time chart of FIG.

In the drawing, the energization and de-energization are repeatedly controlled as energization electrolysis control, and after the various switching valves are switched to the degassing circuit as the de-energization and gas release control,
Water is supplied by operating a circulation pump or by opening a hot water supply valve.

By degassing and passing the water without electricity, the generated gas is desorbed from the surface of the electrode when the electricity is not electricity, and is retained in the upper part of the filtration tank. In addition, when the power is not supplied, the generated gas is desorbed from the electrode surface, so that a local voltage due to the gas partial pressure (gas concentration) can be eliminated, and current can be supplied at a stable voltage, that is, a more stable constant current. .

(Embodiment 4) FIG. 6 is a time chart showing a control method of the electrolysis control and the degassing control.

In the drawing, before the electrolysis control, the degassing control is always performed, so that the air mixed and retained under various conditions in the bathtub water circulation circuit, for example, the gas generated from the bathing agent and the adsorbed air are circulated by the circulation pump. When the is operated (purification or boiling), the retained air tends to stay in the upper part of the filtration tank 12, and when the amount of the retained air increases, as described in detail in the first embodiment, the energization has a bad influence. Before the degassing control, it is possible to form a coherent layer on the surface of the filter medium which is stable and necessary for purification.

As the gas venting control before the electrolysis control, a plurality of repetitive controls, that is, a repetitive control of water passage and gas venting, can more reliably increase the gas venting effect. It is.

(Embodiment 5) FIG. 7 shows a flowchart for controlling the heating of the water flow during the degassing control.

At the time of degassing control, water is heated by the heating unit 18 (burner burner when the heat source is gas and heating by a heat exchanger or direct heating when the heat source is electricity) of the purification device in FIG. By this, the viscosity becomes low (small) due to the hot water, so that it becomes easy to be sucked into the filtration tank 12, and further, the staying gas is heated by the hot water to expand the volume and easily float, thereby shortening the degassing time. it can. Furthermore, the temperature of the hot water in the filtration tank 12 rises and the electrolytic voltage decreases, which works stably to improve the coagulant generation.

(Example 6) FIG. 8 shows a comparison between the degassing time and the purification performance (turbidity) during the water flow heating control.

In the figure, the flowing water temperature is (1) 23 ° C., (2) 3
The temperature was changed to 5 ° C., (3) 55 ° C., (4) 60 ° C., and (5) 70 ° C. The degassing time was shortened as the water passing temperature was increased. This is because, as described in detail in the fifth embodiment, the viscosity becomes low (small), the suction gas is easily sucked into the filtration tank 12, and the retained gas is heated to expand the volume and float. On the other hand, when the water passage temperature is high, especially when the temperature is high, the coagulation layer formed on the surface of the filter medium 13 is broken, that is, the bonding force of the coagulant is reduced, and the function of the coagulation layer (the pores of the coagulation layer are It becomes large, and fine dirt components in the bathtub water 20, for example, the physical filtration performance of general bacteria and the like are remarkably deteriorated), and the purification performance is lowered. Therefore, it is desirable in consideration of the degassing time and the coagulation function. The water passage temperature is in the range of 35 to 60C, and the more preferable water passage temperature is in the range of 35 to 55C.

[0047]

As is apparent from the above description, the purifying apparatus of the present invention has the following effects.

After switching various switching valves to the gas venting circuit side, by passing water for a certain period of time, the gas remaining in the upper part of the filtration tank is discharged to stabilize the electrolysis voltage at the time of energization and to remove the flocculant. A certain amount can be surely generated, and the dirt component of the bathtub water can be purified by the filter medium layer and cleaned.

Further, as a water-passing means, the stagnant gas can be surely discharged by opening the bathtub water or hot-water supply valve by the circulation pump and passing the water.

Further, by performing degassing and passing water a plurality of times within the set energization time, it is possible to prevent the electrolysis voltage from increasing, to stabilize the electrolysis voltage, and to surely generate a certain amount of coagulant.

In addition, while energization and non-energization are repeated,
By supplying water at the time of non-energization, gas can be more reliably removed.

In addition, by ventilating and passing water before energization, the air mixed in the circulating water circuit is discharged, so that the electrolysis voltage can be further stabilized, and a certain amount of coagulant can be reliably produced. .

The degassing time can be shortened by passing water through heating. Further, by setting the heating water flow temperature to 60 ° C. or lower, the aggregated layer formed on the surface of the filter material is not broken, and stable purification performance can be maintained. Although the filter material of the embodiment is an alumina ball filter material, it can be applied to all granular filter materials such as glass bead filter materials and beach sand filter materials. On the other hand, although not described in detail in the embodiment, the gas release control method of the purifying apparatus of the present invention is applied to a cartridge filter, that is, a fibrous filter, a wound filter, a glass fiber filter, a stainless steel fiber filter, a porous ceramic filter, and the like. It is valid.

In the embodiment, the manual operation using the remote controller has been described. However, in the case where the bathtub is automatically supplied with hot water by the automatic control means, for example, the purifying device, the bathtub water is supplied to the bath connection adapter more than the hot water supply or water level sensor or the like. Based on a water level set in advance such as a water level switch, it is determined that there is a water level in the bathtub, and as a more reliable method, when a water level set by a user and a set hot water temperature are determined, an automatic control method of energizing control and degassing control is also available. It is within the scope of the present invention.

Further, in the present invention, the stainless steel cathode has been described as the corrosion-resistant metal cathode.
Other than the normal bath water, other than those that elute components that clearly stain the bath water (such as discoloration of the bath water) due to rust, etc., for example, pure plates of aluminum, copper, nickel, titanium, platinum, gold, silver, etc. and iron Alloys, aluminum alloys, copper alloys and the like can be used, but austenitic stainless steel and aluminum are preferred cathode materials in view of economy and rust.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a purification device of the present invention.

FIG. 2 is a flowchart of degassing control in the purification device according to the first embodiment of the present invention.

FIG. 3 is a time chart of the control.

FIG. 4 is a configuration diagram of a degassing circuit of the same control.

FIG. 5A is a flowchart of degassing control in a purification device according to a third embodiment of the present invention. FIG. 5B is a time chart of the control.

FIG. 6 is a time chart of degassing control in a purification device according to a fourth embodiment of the present invention.

FIG. 7 is a flowchart of degassing control in a purification device according to a fifth embodiment of the present invention.

FIG. 8 is a degassing time and purifying performance comparison chart of degassing control in a purifying apparatus according to Embodiment 6 of the present invention.

FIG. 9 is a configuration diagram of a conventional bath water heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water supply temperature detection part 2 Flow rate detection part 3 Hot water temperature detection part 4 Hot water supply amount control part 5 Hot water supply valve part 6 Water flow detection part 7,132 Circulation pump 8 Bath water temperature detection part 9 Circulation circuit 10 Purification circuit 11 Drainage circuit 12,127 Filtration tank 13,125 Filtration material 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 Outgoing passage 24 Remote control 25 Water level detection Parts 26, 126 Aluminum anode 27 Stainless steel cathode 28 Retentive gas 29 Suction port

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Kazunori Sone 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Tatsushi Iwamoto 1006 Kadoma, Kazuma, Osaka Prefecture F-term in Matsushita Electric Industrial Co., Ltd.

Claims (7)

[Claims] 1. A heating unit for heating water supply and bathtub water to hot water, a water supply water temperature detection unit provided in a water supply circuit for detecting water supply temperature and a flow rate detection unit for detecting water supply flow rate, and a hot water temperature provided in a water supply circuit. A hot water supply temperature control unit for controlling the hot water supply flow rate, a hot water supply valve unit for supplying hot water to the bathtub water circulation circuit, and a water flow detection unit for detecting the flow of hot water and bathtub water upstream of the hot water supply valve unit. A circulation pump for circulating bath water in the bath water circulation circuit, and a circuit configuration of a circulation circuit, a purification circuit, and a drain circuit as the bath water circulation circuit, and an aluminum anode and a corrosion-resistant metal cathode are provided on the upper part of the purification circuit. And a switching tank A for switching between a purification circuit and a circulation circuit downstream of the filtration tank, and a bathtub water circulation circuit between a circulation pump and a hot water supply valve unit. In a configuration in which a switching valve B, a switching valve C for switching between a purifying circuit and a circulation circuit between a hot water supply valve section and a filtration tank, and a switching valve D for opening and closing a drain circuit are respectively provided, the aluminum anode and the corrosion-resistant metal cathode are energized. As a means for discharging generated gas generated from the filter tank from the filtration tank, the switching valves A and B are switched to the degassing circuits of the switching valves C and D, and then water is passed through the degassing circuit for a certain period of time. Purifier with controlled degassing. 2. The purifying apparatus according to claim 1, wherein the water-passing means is constituted by passing bathtub water by a circulation pump or by passing a hot water by opening a hot water supply valve. 3. The purification apparatus according to claim 1, wherein water is passed through the aluminum anode and the corrosion-resistant metal cathode a plurality of times within a set energizing time. 4. The purifying apparatus according to claim 1, wherein water is passed when the current is not supplied in the control in which current supply and non-current supply are repeated between the aluminum anode and the corrosion-resistant metal cathode. 5. The purifying apparatus according to claim 1, wherein water is passed before control of supplying current to the aluminum anode and the corrosion-resistant metal cathode. 6. The purifying apparatus according to claim 2, wherein when the hot water supply valve is opened, the supplied water is heated and passed. 7. The purification apparatus according to claim 6, wherein the heating of the supplied water is controlled to at least 60 ° C. or less.