JPS6227093A - Ultraviolet irradiation device - Google Patents

Abstract

PURPOSE:To permit effective irradiation, i.e., sterilization by selecting the size of a housing in such a manner that the points nearest the respective UV lamps on the inside surface of the housing are irradiate by the lamps contiguous to the lamps nearest said points. CONSTITUTION:The plural UV lamps 7 which irradiate UV rays on the fluid flowing in the housing 1 are attached to the inside of the housing 1. The size of the housing 1 of such UV irradiation device is so selected that the respective points P nearest the respective UV lamps 7 on the inside surface of the housing 1 are irradiated by the lamps contiguous to the lamps nearest said points. as a result, the UV rays from the respective lamps 7 also arrive at the points P on the inside surface of the housing 1 corresponding to the contiguous lamps. The effective irradiation, i.e., sterilization is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for sterilizing bacteria contained in a fluid such as tap water or air.

[Conventional technology]

Means for sterilizing bacteria contained in fluids such as tap water or air have been conventionally known, and this will be briefly explained with reference to FIGS. 2 and 3. (1) is a housing, For example, it has a cylindrical shape, and has a fluid inlet (4) and an outlet (5) near one longitudinal end (lower end in the figure) and near the other end (upper end in the figure).
is formed.

A plurality of grooves (6) made of ultraviolet transparent material penetrate the upper and lower surfaces (2) and (3) of the housing (1) and are inserted into the housing (1) to provide liquid contact with the fluid in the housing (1). They are arranged in a tight or airtight manner, and inside each of these nosoipes (6) there is a rod-shaped (soap-like) ultraviolet light emitting lamp (
7) is installed.

Therefore, the fluid that enters the Jino Using (1) from the inlet (4) flows between the plurality of pipes and heads towards the exit (5), but between them, the ultraviolet light emitting lamp (powerful ultraviolet rays are irradiated) The bacteria in the fluid are sterilized, so that a sterile fluid is obtained at the outlet (5) of the housing (1).

Incidentally, in this conventionally used device, the size of the housing (1) is selected so that its inner surface is as close as possible to the pipe (6), as shown in FIG.

This was conceived with the intention of sterilizing the inner surface of the housing by the ultraviolet light emitted from the ultraviolet light emitting lamp (7) closest to the inner surface of the housing.

[Problem that the invention seeks to solve]

However, such a conventional configuration has the following problems. That is, regarding the inner surface of the housing (1),
Each point where the straight line connecting the center of the housing (1) and the center of each pipe (6) intersects the inner surface of the housing (1), that is, each point where the inner surface of the housing (1) is closest to each pipe (actual point) The line is along the longitudinal direction of the lamp (6), but for convenience of explanation, if we consider point P (shown in Figure 3), the ultraviolet rays emitted by each lamp (7) are adjacent to each other. The lamp (7) or the lamp (6) cannot reach the point P corresponding to the adjacent lamp (7), and therefore the irradiation efficiency of ultraviolet rays to this point P is extremely low. In other words, there was a problem that the ultraviolet rays of each lamp (7) were not effectively utilized.

[Means for solving problems]

In the present invention, the size of the housing (1) is selected so that the ultraviolet light from each lamp (7) reaches a point P corresponding to the adjacent pipe (6).

[Effect]

Each lamp (7) emits ultraviolet light from the adjacent pipe (6).
It also reaches point P on the inner surface of the housing (1) corresponding to
Effective irradiation or sterilization can be performed.

〔Example〕

Referring to FIG. 1, to explain the apparatus according to the invention, the second
The same reference numerals are given to the corresponding parts in the figure and FIG. 3, and the explanation thereof will be omitted.

Now, regarding the value of the radius of the trajectory (8) in which a plurality of (5) lamps (7) are lined up, let the conventional value shown in FIG. 3 be a, and that of the device according to the present invention shown in FIG. 1. As for the radius of the inner surface of the housing (1), b is that of the conventional device shown in FIG. 3, and d is that of the device according to the invention shown in FIG. , when the radius C is selected to be equal to a (C=a), the radius C is selected so that it is larger than the radius dt-b (ld>b).

As shown in FIG. 1, the housing (1) is sized so that the ultraviolet rays from the adjacent lamps (7) reach each point P.

In the conventional device, the above-mentioned point P is irradiated with ultraviolet light only from the lamp (7) closest to it, but according to the above-mentioned device of the present invention, the point P is irradiated with ultraviolet light from the lamps (7) on both sides adjacent to each other. The ultraviolet rays emitted by this lamp (force) also irradiate this point P, and the direction of irradiation of the ultraviolet rays emitted by this lamp (force) is similar to that of a pipe-shaped lamp (only in the direction perpendicular to the central axis of force). In the end, the P in the device according to the present invention is irradiated in all directions.
The amount of ultraviolet rays irradiated to a point is more than three times that of the conventional device shown in Figure 3. Therefore, the light energy of each lamp can be used without wastage, and the sterilization process is faster than that of the conventional device. You can significantly increase your abilities.

FIG. 4 shows still another embodiment of the present invention. In this embodiment, at least the upper and lower surfaces (2) (31) of the housing (1) are formed of a cylindrical surface portion except for the ultraviolet-transparent material. A reflecting plate (9) is provided on the outside of the part to reflect the ultraviolet rays emitted outside the housing (1) back into the housing (1).
This is the case when .

In addition, in FIG. 1 and FIG. 4, five lamps (7) are arranged in the housing (1) on one circular locus (8) concentric with the housing (1). A similar configuration can be achieved even when a plurality of lamps are arranged on concentric circles.

FIG. 5 shows yet another embodiment, in which the upper half lamp (1) is formed into a cylindrical shape, but in this example it is formed into a prismatic shape, and this example is also similar to the above. It is composed of

〔Effect of the invention〕

According to the present invention described above, the ultraviolet rays from each lamp (7) can be effectively used, and the circular locus has a radius C that is the same as the radius a of the circular locus (8) of the conventional device shown in FIG. (8) If the lamp (7) is placed above, the housing (1)
The radius d of the present invention can be made larger than that of the conventional radius d, and therefore the processing capacity for fluids can be increased.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an example of a device according to the present invention, and FIG.
The figure is a longitudinal cross-sectional view of the conventional device, Figure 3 is a cross-sectional view of Figure 2,
FIGS. 4 and 5 are partial cross-sectional views showing other embodiments of the present invention. (1) is a no-using, (6) is a nosoip made of an ultraviolet-transmitting material, and (7) is an ultraviolet-emitting lamp. Agent: E Ito, 1)
:,′,−[. The cross-section of the equipment is shown in Fig. 3, Fig. 5, Fig. 4.

Claims (1)

[Claims] In an ultraviolet irradiation device in which a plurality of ultraviolet lamps are installed in the housing to irradiate ultraviolet rays to a fluid flowing within the housing, each point on the inner surface of the housing where the respective ultraviolet lamps are closest to each other is , an ultraviolet irradiation device in which the size of the housing is selected so as to be irradiated by a lamp adjacent to the closest lamp;