JPS6014838Y2 - Sterile water faucet - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of faucets that use sterile water, such as hand washing water in operating rooms, to prevent the inner surface of the faucet from being contaminated by bacteria floating in the air after the sterile water is turned off. This is what I did.

In order to supply sterile water to a sterile water faucet, a solenoid valve is provided in the middle of a pipe that carries sterile water from a sterile ice storage tank to the faucet, and water is turned on and off from the faucet by opening and closing the solenoid valve.

However, when the solenoid valve is closed after dispensing sterile water from the faucet, the sterile water between the faucet opening and the solenoid valve drips from the opening, and air containing suspended bacteria enters the faucet and pipes instead. Water droplets adhering to the inner wall surface become contaminated.

When the inner wall surface is dry, this risk of contamination disappears.

The faucet of the present invention prevents contamination of the damp inner wall surface of the faucet due to air entering after use.

Hereinafter, the present invention will be explained with reference to drawings showing embodiments.

The drawing is a longitudinal sectional view showing an embodiment of the faucet of the present invention.

A faucet 2 connected to the end of a pipe 1 leading to a sterile water tank (not shown) has a large number of small holes bored through a trumpet-shaped enlarged diameter pipe 4 below a cylindrical main body 3. The shower plate 5 is fixed.

Inside the main body 3, there is a flange 7 with a circular hole 6 bored in the center.
Below the flange 7 in the main body 3, there is a bottomed cylindrical part 8 with an upper opening in the center, and on the outer periphery of the cylindrical part 8, a flange 10 having a through hole 9 is formed. The formed spring receiver 11 is fitted and fixed.

A compression spring 12 is housed in the cylindrical portion 8 of the spring receiver 11, and a sphere 13 supported on the upper end of the spring 12 is inserted into the circular hole 6.
It is designed to come into elastic contact with the opening edge of the lower end and close it.

The opening edge of the lower end of the circular hole 6 is chamfered so that the sphere can come into contact with it without any gap.

That is, by bringing the sphere 13 into elastic contact with the lower end of the circular hole 6 by the spring 11, a check valve is constructed that allows sterile water to flow through the circular hole 6 only from top to bottom.

A branch pipe 14 communicates with the lower part of the flange 7 of the main body 3, and the branch pipe 14 communicates with a source of sterile compressed air via a pipe or hose (not shown).

Reference numeral 15 designates a small hole for draining water bored in the bottom of the spring receiver 11.

Next, the operation of the sterile water faucet of the present invention constructed as described above will be explained.

When sterile water flows out from a faucet, open a solenoid valve (not shown) installed in the middle of the pipe 1 and send sterile water from the pipe 1 to the upper part of the main body 3. The water pressure causes the sphere 13 to resist the spring 12. The sterile water is pushed down, passes through the circular hole 6 and the through hole 9, and flows out from the small hole in the shower plate 5.

To stop the water from flowing out, close the solenoid valve in the middle of the pipe 1 to reduce the water pressure at the top of the main body 3, and the sphere 13 will be pushed up by the spring 12 and come into contact with the lower opening edge of the circular hole 6.
The sterile water above the flange 7 is blocked from flowing out, and the air that has entered from the shirt plate is also prevented from entering above the flange 7.

At the same time, below the flange 7 in the main body 3, a branch pipe 14 is provided.
- Sterile compressed air (doesn't need to be very high pressure).

) is injected.

The sterile air blown into the main body 3 passes through the through holes 9 and flows out of the faucet from the large number of small holes in the shower plate 5, thereby preventing outside air from entering the faucet through the small holes.

If this sterile water/air blowing continues, the inner surface of the faucet below the flange 7 will dry, so the blowing of sterile air may be stopped after drying.

In order to shorten this drying time, the sterile air blown from the branch pipe 14 may be heated by a heater, or the sterile air may be blown through a desiccant and dried.

In order to efficiently and reliably blow in and stop the compressed sterile air, sterile air is supplied to the branch pipe 14 in conjunction with the closing of the solenoid valve provided in the middle of the sterile water supply pipe 1. The solenoid valve for supplying sterile air may be opened or a supply pump may be activated, and a timer may be configured to stop supplying sterile air after a certain period of time (sufficient time for the inside of the faucet to dry).

Although the above description has been made regarding an embodiment of a faucet that discharges sterile water in a shower-like manner, similar functions and effects can be obtained for a faucet that does not discharge sterile water in a shower-like manner.

Since the sterile water faucet of the present invention is constructed and used as described above, it is possible to effectively prevent the inside of the faucet and piping from being contaminated by bacteria floating in the air, ensuring a constant supply of clean, sterile water. This can be done and has great practical effects.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view showing an embodiment of the faucet of the present invention. 2: Faucet, 3: Main body, 5: Shower plate, 6: Round hole, 7:
Flange, 8: Cylindrical part, 9: Through hole, 10: Flange, 1
1: Spring receiver, 12: Compression spring, 13: Sphere, 14: Branch pipe, 15: Small hole.

Claims (1)

[Scope of utility model registration request] This faucet for sterile water is provided with a check valve in a cylindrical main body 3, and a branch pipe 14 for blowing sterile air into the main body 3 closer to the opening than the check valve.