JPH038393Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is a water passage device and its sterilizer for use in sterilizing water in departments that handle medical, pharmaceutical, food, etc. where hygiene is a particular issue. It is related to.

(Prior Art) Conventionally, methods for sterilizing tap water using a water passing device that sterilizes tap water and supplies it to the outside include a method of sterilizing water by passing boiling water through the water passing device, and a method of sterilizing water using formalin as shown in Fig. 9. There is a way.

(Problem that the invention aims to solve) In the case of the method of sterilizing by passing boiling water through a water flow device, only boiling water of around 90℃ can be used due to the heat resistance conditions of the device, and this level of boiling water can kill pathogenic bacteria. It only kills trophozoites and cannot completely kill spores of tetanus, gas sterilizers, and Bacillus subtilis.Also, if an ultrafilter is used, the filter housing is likely to become distorted due to rapid heating and cooling. Therefore, there is a drawback that heating and cooling require considerable skill and time, and the formalin sterilization method shown in FIG. At the same time as supplying water, when sterilizing the water passage device, the on-off valve 3
There is a formalin sterilization method in which raw tap water is put into the formalin water tank 34 by closing the valve 1 and opening the on-off valves 32 and 33, and the formalin in the water tank 34 is pushed out to the prefilter of the water passing device. In this case, the formalin in the formalin water tank 34 is supplied to the prefilter of the water passage device while being diluted with tap water, so there is a drawback that the concentration of formalin cannot be controlled.

(Means for solving the problem) The present invention is a water flow device that sterilizes and removes bacteria contained in water from a water supply source and supplies sterilized water to the outside. A constant flow valve that maintains the amount of water constant against pressure fluctuations of water on the water supply source side, an ejector that generates suction force at the suction port by passing water, and a sterilizing chemical solution in the water passing device. The constant flow valve and the ejector are connected in series on a water passageway for supplying water from a water supply source to the outside, and the chemical solution is capable of being sucked into the suction port of the ejector. It is located in a sterilizer for water flow equipment connected to a chemical tank.

(Function/Effect) In the case of the sterilizer for water passing device configured as described above, water from the water supply source passes through the constant flow valve and the ejector which are connected in series with each other, and the water passing through the ejector converts the chemical solution into Sterilizing chemical solution in the tank,
For example, formalin mixes with water and is supplied to the entire water channel of the water passing device, so that the entire water channel including the filter of the water passing device is effectively sterilized, and the sterilizing chemical solution in the chemical tank is passed through the ejector to the water. As a result of the constant flow valve, the amount of water to be mixed with water is proportional to the amount of water regardless of fluctuations in the water pressure of the water supply source.As a result, the concentration of the sterilizing chemical solution in the chemical solution tank mixed into the water is kept constant, and a stable sterilizing effect can always be obtained. can.

(Example) Next, the configuration of an example of the present invention is shown in Figures 1 to 8.
This will be explained using figures.

An external piping port 1 connected to a water supply source includes a constant pressure valve 2, a constant flow valve 3, an electromagnetic shutoff valve 4, and a prefilter 5, in this case, a prefilter 5 for removing contaminants of coarse particles to some extent, and an ultrafiltration filter. 6. In this case, an antibacterial faucet 7 that discharges sterilized water in the form of a shower to the outside through an ultrafiltration filter 6 that removes fine particles, bacteria, and pyrogens invisible to the naked eye; in this case, FIG. As shown in Figure 6,
An antibacterial faucet 7 in which a mesh storage bag 9 filled with Ag-containing soluble glass 8 is attached to a faucet main body 13 via a shower plate 11 with many holes 10 in the plate material and countersunk screws 12, or FIG. As shown in the figure, an Ag-impregnated activated carbon sheet 14 in which Ag is impregnated on a sheet-like adsorbent in which activated carbon is impregnated and adsorbed into urethane foam is connected to an antibacterial faucet 15 that is attached to a faucet body 13, and a constant flow valve 3 An ejector 17 is connected between the electromagnetic on-off valve 4 and the electromagnetic on-off valve 4 and the prefilter 5 via an on-off valve 16.
The hose 2 is connected to the suction port 18 of the
A strainer 21 attached to the tip of the hose 20 is inserted into a chemical tank 22 containing a sterilizing chemical, such as formalin.

Next, the operation of this embodiment will be explained.

In the normal water use state in the sterilizer 24 for the water passage device 23 configured in this way, that is, in the state where the solenoid on-off valve 4 is open and the on-off valves 16 and 19 are closed, water from the water supply source is transferred to the ejector. Since the water is supplied to the outside through only the prefilter 5 and ultrafiltration filter 6 of the water flow device 23 without passing through 17, the water does not mix with the sterilizing chemical solution in the chemical tank 22, such as formalin. Sterilized water is discharged to the outside from the antibacterial faucet 7 or 15 in the form of a shower, and the discharge and stop of this shower can be controlled as appropriate by turning on and off the electromagnetic on-off valve 4.
In addition, even if the shower stops discharging, the flow from the outside is maintained by the Ag-containing soluble glass 8 in the antibacterial faucet 7 or 15, or by the activated carbon sheet 14 made of urethane foam that adsorbs activated carbon along with Ag. Bacteria are prevented from entering the water device 23.

Next, the water flow device 23 is turned off with the electromagnetic on-off valve 4 turned off.
When the on-off valve 16 at the upstream position of the water passage passing through the pre-filter 5 and the ultrafiltration filter 6 and the on-off valve 19 at the suction port 18 of the ejector 17 are opened, water from the water supply source flows through the ejector 17 and the water passage device 23. The sterilizing chemical solution, such as formalin, in the chemical tank 22 is mixed into the water by the water passing through the ejector 17 and being discharged to the outside from the antibacterial faucet 7 or 15 through the prefilter 5 and ultrafiltration filter 6. Then, the entire passageway including the prefilter 5 and ultrafiltration filter 6 of the water passage device 23 is effectively sterilized.
Moreover, the amount of the sterilizing chemical in the chemical tank 22 mixed with water through the ejector 17 is proportional to the amount of water, and in this case, as the flow rate is kept constant by the constant flow valve 3, even more A stable sterilizing effect can be obtained by keeping the concentration of sterilizing chemicals such as formalin mixed in water constant regardless of fluctuations in water pressure at the water source or increases in back pressure due to clogging of the filters 5 and 6. . With the formalin solution at a certain concentration filling the water passing device 23 in this manner, the on-off valve 16 is temporarily closed to allow the formalin solution to remain in the water passing device 23 for sufficient sterilization, and then the on-off valve 19 is closed. On-off valve 1
By opening 6, the formalin solution in the water passage device 23 can be pushed out to the outside for cleaning.

Note that the prefilter 5 and ultrafiltration filter 6 of this embodiment can be replaced with a sterilization device using ultraviolet rays.

[Brief explanation of drawings]

Fig. 1 is a schematic front view showing the entire device according to an embodiment of the present invention, Fig. 2 is its right side view, Fig. 3 is its plan view, Fig. 4 is its piping diagram, and Fig. 5 is its FIG. 6 is a cutaway front view of the bacteria faucet 7, FIG. 6 is a back view of FIG. , FIG. 9 is an explanatory diagram of a conventional embodiment. 4... Solenoid on-off valve, 5... Pre-filter, 6...
...Ultrafiltration filter, 16... Opening/closing valve, 17...
Ejector, 22... Chemical tank, 23... Water passage device, 24... Sterilization device.

Claims (1)

[Scope of utility model registration request] In a water flow device that sterilizes water from a water supply source to remove bacteria, etc. contained in the water and supplies sterilized water to the outside, the amount of water supplied to the outside is adjusted to fluctuations in the pressure of the water on the water supply source side. A constant flow valve that maintains the water at a constant level, an ejector that generates a suction force at the suction port by passing water, and a chemical tank that contains a sterilizing chemical solution for the water passing device. The constant flow valve and the ejector are connected in series on a water passageway for supplying water to the outside, and the chemical liquid tank is connected to the suction port of the ejector so as to be capable of sucking the chemical liquid. Sterilizer for use.