JP2000325953A - Water treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To certainly suppress the propagation of bacteria in stagnated water in a filter material or residual water in a main body over a long period of time, in a water treatment apparatus equipped with a filter material, by providing a means for supplying silver ions due to an electric field and a control means for controlling the electrolytic quantity of silver on the upstream side of the filter material. SOLUTION: A silver ion supply device 1 is arranged on the upstream side of a water purifying catridge 10 to continuously or intermittently add silver ions to supplied water. The silver ion supply device 1 is constituted as a supply device due to the electrolysis of silver and a silver electrode 6 being an anode and an insoluble electrode 7 being a cathode are arranged to a silver dissolving tank 8. Therefore, if a current is supplied to both electrodes 6, 7 at every predetermined time, silver ions can be supplied to supplied water. At this time, the current value supplied to both electrodes 6, 7 through a current value control device 30 is controlled on the basis of the flow rate signal from the flow rate counter 5 by a supply control device 3. By this constitution, the propagation of bacteria in residual water in the filter material etc. housed in the water purifying cartridge 10 is certainly suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a water treatment device such as a water purifier or a water purifier.

[0002]

2. Description of the Related Art In a water purifier and a water purifier, activated carbon or the like is used as a filter medium for treating residual chlorine, organic substances, and the like in tap water. Since residual chlorine as a disinfectant has been removed from the water after passing through the filter media by this activated carbon, etc., if the water conditioner and water purifier are not used for a long time, the residual water inside the filter media and the residual There is a problem that bacteria in water grow. Generally, a method of using antibacterial activated carbon to which silver is attached as activated carbon in a filter medium is used to suppress the growth of the bacteria. This antibacterial activated carbon elutes silver ions when it comes into contact with water, and the silver ions can suppress the growth of bacteria.

[0003]

However, in the antibacterial activated carbon impregnated with silver, the elution period of the silver ion is about several days, and the bacteria in the residual water in the filter medium and the residual water remaining in the main body for a long period of time. There is a problem that growth cannot be suppressed. An object of the present invention is to solve the above-mentioned problems of the prior art.

[0004]

In order to achieve the above object, the present invention provides a water treatment apparatus provided with a filter medium, comprising means for supplying silver ions by electrolysis of silver provided on the upstream side of the filter medium; Control means for controlling the amount of silver electrolysis. The silver ions make it possible to suppress the growth of bacteria in the residual water in the water treatment apparatus and in the stagnant water of the filter medium. In addition, since the amount of silver ions supplied can be controlled, an appropriate antibacterial action can always be obtained.
The supply of silver ions from the means for supplying silver ions may be continuous or intermittent. Even if it is intermittent, it is adsorbed by the filter medium on the downstream side and gradually dissolves out of water from the filter medium, so that a continuous effect can be obtained.

[0005]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows one embodiment. In FIG. 1, supply water such as tap water is supplied to the water purification cartridge 10 from the upstream, and the supply water is purified by a filter medium such as activated carbon housed in the water purification cartridge 10 and is then flowed downstream. A silver ion supply device 1 is provided on the upstream side of the water purification cartridge 10 so that silver ions are added to supply water continuously or intermittently. The silver ions added to the supply water are adsorbed on the filter medium (eg, activated carbon) of the water purification cartridge 10, and the antibacterial action is maintained for a predetermined time even after the supply of silver ions from the silver ion supply device 1 is stopped. I have.

The silver ion supply device 1 is a supply device using silver electrolysis, and a silver dissolving tank 8 has a silver electrode 6 serving as an anode.
And an insoluble electrode 7 as a cathode. By supplying electricity to the electrodes 6 and 7 at predetermined time intervals, silver ions are supplied into the supply water.
Platinum, gold, carbon rod, SUS, T
i, Ti-Pt can be used

The amount of silver ion eluted is determined by Faraday's law shown in the following equation. Therefore, the silver ion concentration of the supply water due to the addition of silver ions can be made constant by detecting the flow rate of the supply water and controlling the current value flowing between the silver electrode and the insoluble electrode according to the detected value. it can. Also, an arbitrary concentration can be obtained by controlling the current value. Silver elution amount (g) = 1 gram equivalent of silver (g) x ｛current value (A) x
Time (sec) ÷ 96500 (q) 濃度 Silver concentration in feed water (g / L) = 1 gram equivalent of silver (g) × ｛current value (A) ÷ (96500 (q) × flow rate (L / sec) )｝

In order to detect the flow rate, a flow rate counter 5 is provided in the flow path of the supply water. In this embodiment, a flow counter 5 is provided between the silver ion supply device 1 and the water purification cartridge 10, and sends a flow signal to the supply control device 3. The supply control device 3 obtains a current value according to the above equation based on the flow signal from the flow counter 5, and controls the current value supplied to the silver electrode 6 and the insoluble electrode 7 via the current value control device 30. ing. By this current value control, the silver ion concentration can be kept constant as described above. Further, the silver ion concentration can be arbitrarily controlled.

The supply controller 3 calculates an accumulated flow value based on a flow signal from the flow counter 5 and, when the accumulated value reaches a predetermined value, sends a signal to the current value control device 30 to supply silver ions for a predetermined time, thereby intermittently. It is also possible to supply silver ions specifically.

Next, the operation of the embodiment will be described. In FIG. 2, the supply control device 3 detects the flow rate from the flow counter 5 (step S1), and calculates a current value for supplying predetermined silver ions based on the detected value (step S2). Then, current is supplied to the silver electrode 6 and the insoluble electrode 7 via the current value control device 30, and the process returns to step S1. By the above operation,
The silver ion supply device 1 supplies an accurate amount of silver ions.

Next, the intermittent supply operation will be described. In FIG. 3, the supply control device 3 detects and integrates the value from the flow counter 5 (step S10), and when the accumulated value reaches a predetermined value (step S11), similarly calculates the current value (step S12). A signal is sent to the value controller 30, and the silver electrode 6 and the insoluble electrode 7 are energized based on the current value (step S13). After energizing for a predetermined time (step S14),
The current is stopped (step S15), and the process returns to step S10. With the above operation, a constant amount of silver ions can be constantly supplied intermittently.

According to the embodiment described above, it is possible to supply silver ions at a constant concentration in a water purifier, a water purifier, or the like, and to suppress the growth of bacteria in residual water or retained water in the main body or the filter medium. it can. In addition, since intermittent driving can be performed accurately, efficient antibacterial action can be appropriately maintained.

[0014]

As described above, according to the water treatment apparatus of the present invention, there is an effect that the growth of bacteria can be suppressed.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of one embodiment of the present invention.

FIG. 3 is a flowchart showing another operation of the embodiment of the present invention.

[Explanation of symbols]

1: silver ion supply device, 3: supply control device, 5: flow counter, 6: silver electrode, 7: insoluble electrode, 8: silver dissolution tank,
10: water purification cartridge, 30: current value control device.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) C02F 1/50 540 C02F 1/50 540B 550 550D 550L 560 560F (72) Inventor: Eriko Nakamura Tokyo 1463, Hazama-cho, Hachioji, Japan F-term (reference) 4J024 AA02 AB07 BA02 CA13 DA03 DB27 4D061 DA03 DB01 DB09 EA03 EB02 EB04 EB30 EB31 EB37 EB39 FA06 GA02 GC02 GC12 GC20

Claims (3)

[Claims] 1. A water treatment apparatus provided with a filter medium, comprising: means for supplying silver ions by electrolysis of silver provided upstream of the filter medium; and control means for controlling the amount of silver electrolysis. A water treatment apparatus characterized by the above-mentioned. 2. The water treatment apparatus according to claim 1, wherein the means for supplying silver ions continuously supplies silver ions. 3. The water treatment apparatus according to claim 1, wherein the means for supplying silver ions supplies silver ions intermittently.