JPH02222766A - Ultraviolet flowing water sterilizer for water purifier - Google Patents

Abstract

PURPOSE:To remove bacteria by forming a flowing water part between an inner pipe and an outer pipe, providing a unit and arranging a sterilizer lamp in the unit. CONSTITUTION:The inlet-side sterilizer 1 and outlet-side sterilizer 2 of the water purifier in the water purifier system are connected in series in the axial direction. A sterilizing lamp 5 for the sterilizers 1 and 2 is arranged at the center. The water to be treated is introduced from a flowing water inlet 7, allowed to flow through the double pipe surrounded by a quartz glass pipe 3, a hard 'Pyrex(R) glass pipe 4, an upper lid 10 and a lower lid 11 in the sterilizer, and discharged from a flowing water outlet 6. When the water passes through the double pipe, the sterilizing lamp is lit, and a sterilizing effect is exhibited. In addition, a temp. sensor 12 is provided at a part of the sterilizing lamp, and a hot air generator 8 is operated in linkage with a temp. controller 9. As a result, the sterilizing efficiency is enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an ultraviolet running water sterilizer for use in a water purifier, and provides drinking water free of germs.

(Prior art) Recently, many types of water purifiers have appeared on the market with the purpose of removing bad odor, chlorine odor, and bacteria from tap water caused by river pollution, as well as providing delicious water. ing.

As a method for removing bacteria or preventing their proliferation, silver-impregnated activated carbon is used (for example, in Japanese Patent Application Laid-Open No. 57-1325
No. 85) Those applying ultra-micro filters using hollow membranes (for example, JP-A-58-131187, JP-A-61-171593, JP-A-62-
30507) has been proposed.

(Problems to be Solved by the Invention) However, although silver-impregnated activated carbon can suppress the growth of bacteria to some extent, it does not have strong antibacterial power, and silver is eluted, and depending on the treatment method, it can reach 10 to 5 opp- Another disadvantage is that harmful amounts of silver dissolve in the water.

Additionally, hollow filters are an effective means of removing impurities such as germs, mold, and other microorganisms that cannot be suppressed with silver activated carbon, and impurities such as iron rust. The shortcomings are that the filter life is extremely short and the initial cost is high, and the reality is that there is also the issue of whether consumers will buy a new filter when it has reached the end of its life.

The present invention was proposed in order to improve the above-mentioned drawbacks, and its purpose is to provide a compact ultraviolet sterilizer that can be incorporated into a water purifier and has a long life and is completely sterilized.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes an ultraviolet-transparent glass inner tube, and a hard glass outer tube arranged outside the inner tube,
The upper and lower ends of both glass tubes are sealed to form a water flow section between the inner tube and the outer tube, and units are arranged above and below, each having a water inlet or an outlet at the top and bottom of the water flow section, respectively. The gist of the invention is also an ultraviolet water sterilization device for a water purifier, characterized in that a sterilization lamp is commonly disposed in both units inside the inner tube.

More specifically, in the present invention, two units each having a double-tube water flow path consisting of an ultraviolet-transparent glass inner tube and a hard glass outer tube are arranged, and the two water flow paths are arranged in the center of the unit. This device is characterized by having a common germicidal lamp.

(Function) The sterilizer that should be incorporated into a water purifier has two functions: sterilizing bacteria that enter from city water and sterilizing bacteria that enter the air as airborne bacteria from faucets. Must have. The inventors satisfied this point,
Furthermore, we have developed a double-tube type device that can share the same conventional ultraviolet lamp as a long-life, compact sterilization method.

In other words, there is no need to be particular about the shape or lighting method of germicidal lamps, but for example, a part of a straight pipe low-pressure mercury lamp can be placed on the inlet side of a water purifier, that is, a part can be placed on the water purifier's inlet side to sterilize bacteria contained in city water. In order to prevent back contamination caused by germs from the outlet side, that is, from the faucet, a two-way running water system is provided around the germicidal lamp. This has the effect of ensuring thorough sterilization treatment, which should be performed as a water purifier.

(Example) Next, examples of the present invention will be described.

It should be noted that the embodiments are merely illustrative, and it goes without saying that various changes and improvements may be made without departing from the spirit of the present invention.

FIG. 1 shows an ultraviolet water sterilization device for a water purifier according to the present invention.

In the figure, 1 is a sterilizer on the inlet side of the water purifier, 2 is a sterilizer on the outlet side of the water purifier, 3 is a quartz glass tube, 4 is a hard Pyrex glass tube, 5 is a sterilization lamp (15WL6 is a running water outlet, 7 is a running water 8 is a hot air generator, 9 is a lighting device and a temperature control device, 10 is an upper lid, 11 is a lower lid, and 12 is a temperature sensor.More specifically, in the present invention, in the water purifier system, The artificial side sterilizer (unit) of the water purifier and the water purifier outlet side sterilizer 2 are vertically connected in series (in the axial direction), and a 15W power supply common to the sterilizers 1 and 2 is installed in the center.
Germicidal lamps 5 are arranged. Each sterilizer has a system in which the water to be treated flows from a lower flow part through a double pipe surrounded by a quartz glass tube 3, a hard Pyrex glass tube 4, an upper cover 10, and a lower cover 111, and exits from a flow water outlet 6. When water passes through the double pipe, the sterilization lamp lights up and the sterilization effect is activated. A temperature sensor 12 is provided in a part of the germicidal lamp, and a hot air generator 8 is operated in conjunction with a temperature control device 9 so that the lamp surface temperature is always 30 to 40°C. .

Using this device, we actually conducted the following experiment to confirm the bactericidal effect.

As raw water used in the test, water containing approximately 101 cells/ybl of Escherichia coli and Bacillus subtilis was prepared, and water was passed through the lower part of the water flow part of the device 1 for 32 minutes to exit from the water flow outlet 6. After the lamp was turned on and the water had passed for 5 seconds, the number of bacteria was measured using the agar plate method. The results showed that the number of bacteria in the water after passing through was zero, indicating that sterilization was thorough.

In addition, regarding the outlet side sterilizer 2, assuming reverse contamination from the faucet, the same 101/-2 pieces as above are added from the running water outlet 6.
Raw water containing bacteria was passed through the tube so as to come out from the lower part of the water flow section, and the number of bacteria in the water passing through the tube was measured using the agar plate method 5 seconds after the lamp was turned on. As a result, the number of bacteria was zero, confirming the bactericidal effect of this device.

(Effects of the Invention) The present invention, like soft clay, has an ultraviolet-transparent glass inner tube and a hard glass outer tube arranged outside the inner tube, and seals the upper and lower ends of both glass tubes. A water flow section is formed between the pipe and the outer pipe, and units are arranged above and below the water flow section, each having a water inlet or an outlet above and below the water flow section, and
By arranging a sterilization lamp in common to both units inside the inner tube, the sterilization device is built into a water purifier, and has sufficient sterilization ability against germs contained in city water and germs entering from the faucet. It has the effect of an ultraviolet sterilizer, and since it is provided with two running water sections, it has the effect of efficiently increasing the sterilizing effect and allowing the sterilization to be carried out.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the ultraviolet water sterilization device for a water purifier according to the present invention. ■... Sterilizer on the inlet side of the water purifier, 2... Sterilizer on the outlet side of the water purifier, 3... Quartz glass tube, 4... Hard Pyrex glass tube, 5... Germicidal lamp (15W) ,
6... Running water outlet, 7... Running water inlet, 8...-Hot air generator, 9... Lighting device and temperature control device, 10...
- Upper lid, 11... Lower lid, 12... Temperature sensor.

Claims (1)

[Claims] A UV-transparent glass inner tube and a hard glass outer tube are placed outside this inner tube, and the upper and lower ends of both glass tubes are sealed.
A water flow part is formed between the inner pipe and the outer pipe, and units having water inlets and outlets respectively above and below the water flow part are arranged above and below, and both units are arranged inside the inner pipe. An ultraviolet water sterilization device for water purifiers, characterized in that a sterilization lamp is commonly disposed in the water purifier.