Sterilizing device for pressurized fluid

Abstract

The invention provides an ultraviolet sterilizing device that can efficiently sterilize a large volume of gas or pressurized liquid with ultraviolet light in a short time and that can be made compact and used safely and stably over a long time. A sterilizing device for pressurized fluid that has a pressure-resistant container or piping that defines a pressurized space and that sterilizes a pressurized fluid such as a pressurized gas or a pressurized liquid present in the container or the piping by irradiating the same with ultraviolet light, wherein said ultraviolet sterilizing device is characterized in that an optical member for ultraviolet light emission such as a diffusing lens or a light guiding plate is disposed in the pressurized space and the ultraviolet light is irradiated onto the pressurized gas or the pressurized liquid present in the pressurized space by the ultraviolet light being emitted from an ultraviolet light source such as a ultraviolet light emitting diode and transmitted to the optical member for ultraviolet light emission by using an optical transmission path such as an optical fiber.

Description

technical field [0001] The invention relates to a pressurized fluid sterilizing device for ultraviolet sterilizing fluid in a pressurized state. More specifically, it relates to a pressurized fluid sterilizing device for irradiating ultraviolet rays to a pressurized fluid, wherein the pressurized fluid is a pressurized gas obtained by pressurizing a gas or a liquefied gas. A pressurized fluid, and a pressurized fluid composed of a pressurized liquid obtained by pressurizing a liquid. Background technique [0002] Ultraviolet light having a wavelength of 200 to 350 nm not only acts on the nucleic acid that is the protoplasm of bacteria to lose its ability to proliferate, but also has the effect of destroying the protoplasm to destroy bacteria. As a light source of such ultraviolet rays, a low-pressure mercury lamp (so-called germicidal lamp) that emits light of a wavelength of 253.7 nm (resonance of mercury) generated by discharge of mercury vapor at a low pressure (about 0....

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Problems solved by technology

[0015] However, in the device disclosed in Patent Document 7, since the tank is separately provided in the pressurized air supply line (Patent Document 7 figure 1 7f) in the container, and the ultraviolet germicidal lamp is arranged inside it, therefore, the miniaturization of the device is limited

In addition, the purpose of this device is to prevent the problem that bacteria will be discharged when the device is restarted after a long-term stop. Therefore, the tank needs to be sandwiched in the discharge pipe at the most downstream of the pressurized air supply line. This brings great restrictions to the installation conditions of the sterilization device itself

In addition, there is a problem that when the device starts to work, the pressure surges and the flow rate fluctuates due to the failure of the pressurization system or the damage of the piping, etc., vibration (shock) occurs, and when the ultraviolet germicidal lamp is damaged by this vibration, the mercury Outflow to the outside

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