JP3646831B2 - UV sterilizer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of an ultraviolet sterilizer.
[0002]
[Prior art]
Conventionally, as shown in FIG. 5, for example, an ultraviolet sterilization apparatus that has been implemented includes a reflector 1 having an arc surface inside an ultraviolet irradiation apparatus body, and a water-cooled jacket 2 inside the reflector 1. An ultraviolet light source 3 housed in the container is disposed and configured to irradiate the surface of the workpiece with ultraviolet rays to sterilize the workpiece surface.
[0003]
[Problems to be solved by the invention]
However, according to the ultraviolet sterilization apparatus described above, about 80% of the ultraviolet light projected from the ultraviolet light source onto the reflector is projected onto the jacket containing the light source, so that the reflected ultraviolet light contributing to sterilization is as low as 20%. .
Further, according to the ultraviolet sterilization apparatus described above, since the reflector having an arc surface is used, there is a defect that ultraviolet rays are concentrated on a specific location on the work surface.
Furthermore, since the ultraviolet sterilizer is based on the lowest part of the ultraviolet illuminance, if the ultraviolet illuminance varies on the surface of the workpiece, there is a disadvantage that the ultraviolet ray is excessively irradiated in a specific range. When the ultraviolet rays are excessively irradiated, there is a drawback that the plastic is deteriorated and further discolored if the workpiece is made of plastic.
[0004]
This invention is invented in view of said point, Comprising: It aims at providing the ultraviolet sterilizer which can sterilize effectively, the surface of a workpiece | work is comparatively averaged, and an ultraviolet-ray is irradiated.
[0005]
[Means for Solving the Problems]
The present invention has the following configuration in order to solve the above problems. That is, the invention described in claim 1 is configured by connecting two reflectors each having an elliptical cross section, and arranging an ultraviolet light source with a common focus of the two reflectors as a first focus. It is.
Further, the second focal point is located at the symmetrical position of both ends of the first focal point, and the ultraviolet illuminance on the workpiece surface is averaged.
[0006]
The invention according to claim 2 is configured by arranging an ultraviolet light source formed on a water-cooled jacket in accordance with the shape of the sterilizing surface of the workpiece.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the ultraviolet sterilizer of the present invention will be described with reference to FIGS. 2, 3, and 4, reference numeral 11 denotes an ultraviolet sterilizer, which has a box shape, for example. Reference numeral 12 denotes a reflector that is mounted inside the ultraviolet sterilizer 11, and is formed by connecting two reflectors having an elliptical cross section. Further, as shown in FIG. 1, the reflector 12 is configured by arranging an ultraviolet light source at the first focal point common to two reflectors having an elliptical cross section. In addition, the second focal point is configured to be located at symmetrical positions at both ends of the first focal point. Further, the reflector 12 is formed in a mirror surface, for example, from aluminum.
Reference numeral 13 denotes a double-tube water-cooling jacket, which is made of, for example, quartz glass and has an outer dimension of about 23φ. Reference numeral 14 denotes an ultraviolet light source housed in the water-cooling jacket 13, which is configured by using, for example, a 200-watt to 400-watt straight tube low-pressure mercury lamp. In the same apparatus, the distance between the double-tube water-cooling jacket 13 and the reflector 12 is about 4 cm.
[0008]
15 is a work which conveys the front of an ultraviolet light source with a conveyor etc., for example, is a container made of a plastic material, which mainly sterilizes medical containers or food containers that cannot be heat-treated.
[0009]
Further, as shown in FIGS. 2 to 4, an ultraviolet sterilizer is arranged in accordance with the shape of the workpiece. FIG. 2 shows a container having a deep-bottom type work, and an ultraviolet sterilizer is arranged directly above. FIG. 3 shows a case where the side surface of the workpiece needs to be sterilized, and an ultraviolet sterilizer is arranged on the side surface. What is shown in FIG. 4 is a cylindrical shape in which the workpiece is deformed, and there are cases where it is necessary to sterilize the upper and lower sides, and the ultraviolet sterilizer is arranged on the upper and lower sides and the side.
[0010]
Next, a usage example of the above-described ultraviolet sterilizer will be described. In FIG. 2, an ultraviolet sterilizer is disposed above a three-dimensional container conveyed by a conveyor or the like, and the inside of the container is sterilized. Moreover, FIG. 3 arrange | positions the ultraviolet sterilizer on the side surface of a three-dimensional container, and sterilizes the outer surface of a container with an ultraviolet-ray. As shown in FIG. 4, ultraviolet sterilizers can be disposed on the top and bottom and side surfaces of the three-dimensional container to sterilize the inside and outside surfaces of the container simultaneously.
In these UV sterilizations, the reflected light from the first focal point and the reflected light from the second focal point are irradiated on the container as a whole on average, and the ultraviolet rays are excessively irradiated, so that the workpiece is deteriorated, and without further discoloration. Sterilized.
For example, in the usage example shown in FIG. 2, the ultraviolet rays applied to the workpiece are 50% direct light and 50% reflected light. According to the conventional ultraviolet sterilizer shown in FIG. 5, the direct light is 20% and the reflected light is 80%, and the reflected light returns to the water-cooled jacket, so that the utilization rate is lowered.
[0011]
【The invention's effect】
According to the first aspect of the invention, the amount of ultraviolet irradiation to the workpiece is averaged, and there is a special effect that the ultraviolet rays can be used efficiently.
[Brief description of the drawings]
FIG. 1 is a side view of an ultraviolet sterilizer according to the present invention.
FIG. 2 is a side view showing an embodiment of the ultraviolet sterilizer of FIG.
FIG. 3 is a side view showing another embodiment of the ultraviolet sterilizer of FIG. 1;
4 is a side view showing another embodiment of the ultraviolet sterilizer of FIG. 1. FIG.
FIG. 5 is a side view of a conventional ultraviolet sterilizer.
[Explanation of symbols]
11 UV sterilizer 12 Reflector 13 Water cooling jacket 14 UV light source 15 Workpiece

Claims (2)

Two reflectors having an elliptical cross section are connected, an ultraviolet light source is placed with the common focal point of the two reflectors as the first focal point, and the second focal point is symmetrically positioned at both ends of the first focal point. An ultraviolet sterilizer configured so that two focal points are located and configured to average the ultraviolet illuminance on the workpiece surface. 2. The ultraviolet sterilizer according to claim 1, further comprising an ultraviolet light source mounted on a water-cooling jacket in accordance with the shape of the sterilizing surface of the workpiece.

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