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CN-121971668-A - Intelligent ultraviolet sterilization device with vacuum ultraviolet irradiation monitoring capability

CN121971668ACN 121971668 ACN121971668 ACN 121971668ACN-121971668-A

Abstract

The invention belongs to the technical field of ultraviolet sterilization control, and particularly relates to an intelligent ultraviolet sterilization device with vacuum ultraviolet irradiation monitoring capability. The invention forms a complete closed-loop control system by the cooperation of a vacuum ultraviolet detection module, a signal reading module, a data processing and control module and a light source control module. The system takes a low-pressure mercury lamp capable of emitting 185nm vacuum ultraviolet light or an excimer lamp capable of emitting 172nm vacuum ultraviolet light as a sterilizing lamp, takes accumulated vacuum ultraviolet radiation dose as a direct control target and is measured through vacuum ultraviolet spectrum selective detection, and realizes accurate, self-adaptive and traceable sterilization process management through real-time monitoring, operation and feedback.

Inventors

  • ZHENG WEI
  • ZHANG XIN

Assignees

  • 中山大学

Dates

Publication Date
20260505
Application Date
20260206

Claims (9)

  1. 1. An intelligent ultraviolet sterilization device with vacuum ultraviolet radiation monitoring capability, which is characterized by comprising: a germicidal lamp for emitting vacuum ultraviolet radiation and generating ozone; the vacuum ultraviolet detection module is used for detecting vacuum ultraviolet radiation from the vacuum ultraviolet sterilizing lamp in real time and generating a corresponding electric signal; The signal reading module is connected with the vacuum ultraviolet detection module and is used for receiving and processing the electric signals and outputting digital data corresponding to the real-time vacuum ultraviolet irradiance; The data processing and control module is connected with the signal reading module and is configured to receive a target accumulated vacuum ultraviolet radiation dose value set by a user, calculate current accumulated vacuum ultraviolet radiation dose in real time according to the digital data, compare the current accumulated vacuum ultraviolet radiation dose with the target accumulated vacuum ultraviolet radiation dose value, generate and send out a first control instruction when the current accumulated vacuum ultraviolet radiation dose is smaller than the target accumulated vacuum ultraviolet radiation dose value, generate and send out a second control instruction when the current accumulated vacuum ultraviolet radiation dose reaches or exceeds the target accumulated vacuum ultraviolet radiation dose value, and record and display real-time vacuum ultraviolet irradiance and accumulated vacuum ultraviolet radiation dose data; The light source control module is connected with the data processing and control module and the ultraviolet sterilizing lamp and is used for receiving the first control instruction or the second control instruction and correspondingly controlling the on or off of the vacuum ultraviolet lamp; The vacuum ultraviolet detection module, the signal reading module, the data processing and control module and the light source control module jointly form a closed-loop control system taking accumulated vacuum ultraviolet radiation dose as a controlled quantity.
  2. 2. An intelligent ultraviolet sterilization apparatus having a vacuum ultraviolet irradiation monitoring capability according to claim 1, wherein the sterilization lamp employs a low-pressure mercury lamp capable of emitting 185nm vacuum ultraviolet light or an excimer ultraviolet lamp capable of emitting 172nm vacuum ultraviolet light as a vacuum ultraviolet light source.
  3. 3. The intelligent ultraviolet sterilization apparatus having vacuum ultraviolet irradiation monitoring capability according to claim 1, wherein the data processing and control module comprises an embedded microprocessor or a host computer running control software.
  4. 4. The intelligent ultraviolet sterilization apparatus with vacuum ultraviolet irradiation monitoring capability according to claim 1, wherein the light source control module is a mechanical/electronic switch loop formed by a relay or a solid switch or a wireless signal transmitting unit and a wireless signal receiving switch electrically connected with a sterilization lamp, and the wireless signal is a radio frequency signal or an infrared signal.
  5. 5. The intelligent ultraviolet sterilization apparatus with vacuum ultraviolet radiation monitoring capability according to claim 1, wherein the signal readout module is a microcurrent measurement device, in particular a combination of a transimpedance amplifier and an analog-to-digital converter, or an integrated microcurrent meter.
  6. 6. The intelligent ultraviolet sterilization apparatus having vacuum ultraviolet radiation monitoring capability according to claim 1, wherein the vacuum ultraviolet detection module is a first type detector or a second type detector; the first type detector is formed by combining and packaging a silicon-based photodiode and an optical ultraviolet filter, and the optical ultraviolet filter is used for selectively transmitting ultraviolet light of a target sterilization wave band and inhibiting light of other wave bands; The second type of detector is composed of a wide band gap semiconductor material, and the wide band gap semiconductor material is at least one selected from silicon carbide, aluminum nitride, diamond, gallium oxide and boron nitride.
  7. 7. The intelligent ultraviolet sterilization apparatus having vacuum ultraviolet radiation monitoring capability according to claim 6, wherein the optical ultraviolet filter is a bandpass filter of ultraviolet cutoff wavelength.
  8. 8. The intelligent ultraviolet sterilization apparatus having vacuum ultraviolet radiation monitoring capability according to claim 6, wherein the second type of detector is structured as a metal-semiconductor-metal photoconductive detector.
  9. 9. The intelligent ultraviolet sterilization apparatus having a vacuum ultraviolet irradiation monitoring capability according to claim 6, wherein the second type detector has a structure of any one of a PN junction photodiode, a PIN junction photodiode, and a schottky diode.

Description

Intelligent ultraviolet sterilization device with vacuum ultraviolet irradiation monitoring capability Technical Field The invention belongs to the technical field of ultraviolet sterilization control, and particularly relates to an intelligent ultraviolet sterilization device with vacuum ultraviolet irradiation monitoring capability. Background The ultraviolet sterilization technology is a physical sterilization method based on ultraviolet light with specific wavelength (mainly 254nm/270nm and 185nm/172nm wave bands), has the remarkable advantages of high efficiency, broad spectrum, no secondary chemical pollution and the like, is widely applied to various environments such as medical wards, operating rooms, ambulances, food refrigerators, public places and the like, and becomes a key link in a modern clean environment guarantee system. The 254nm/270nm wave band ultraviolet light mainly damages microorganism DNA to realize sterilization, and needs to directly irradiate targets, while 185nm/172nm wave band vacuum ultraviolet light depends on ozone generated in air to sterilize, thus being more suitable for sealing complex space. However, the technology has clear safety and effectiveness requirements in use that the direct exposure of ultraviolet light causes damage to the skin and eyes of personnel, and the ozone generated by the 185nm/172nm band light source can irritate the respiratory tract even though the concentration is low, so that the disinfection process must be carried out in an unmanned environment. In addition, to ensure a sterilizing effect, a sufficient ultraviolet radiation dose must be applied. For different pathogens and scenes, the required ultraviolet irradiation dose, ozone concentration and action time are strictly defined and regulated. The prior art has addressed these challenges in a number of ways. For example, chinese patent applications CN202111404689 and CN202410985480 use human body detection sensors, which automatically turn off the ultraviolet lamp when a person is detected, so as to avoid exposure of the person, which can solve the problem of instantaneous safety exposure of the person, but is only a passive safety interrupt mechanism. The design focuses on whether personnel are present or not, but not whether the sterilization dosage reaches the standard or not, so that the sterilization process is easily interrupted for a plurality of times and cannot be automatically continued under the complex scene of frequent personnel entering and exiting, the delivery of a complete, stable and effective sterilization dosage is finally difficult to ensure, the safety is improved, the process integrity and reliability are sacrificed, the Chinese patent application with the publication number CN202511563118 is provided with an ultraviolet light source device which is mechanically switched between 254nm (main sterilization wave band) and 185nm (ozone generating) wave lengths, and unnecessary exposure risks are reduced by controlling an output wave band, and the centers of the schemes are focused on ultraviolet safety protection. in addition, publication number CN202511411396 proposes a real-time correction technique. According to the scheme, the UVC-LED is combined with the SiC-based ultraviolet detector, and the LED driving current is regulated in real time through detector feedback, so that the power compensation is performed on the UVC-LED with the wavelength of 270nm, the light attenuation of the UVC-LED is slowed down, and the stable output is ensured. Similarly, patent CN114110931a discloses an intelligent air conditioning control system based on deep ultraviolet UVC. The system realizes accurate management of dosage by comprehensively controlling irradiation time and light intensity of the UVC-LED, and dynamically controls the output intensity of ultraviolet light by adjusting current and voltage of the LED, but the method has fundamental limitations that firstly, the physical upper limit exists in a mode of adjusting the luminous intensity of the LED through current, permanent light attenuation caused by material aging cannot be completely compensated, and secondly, the closed-loop control scheme based on direct current is only suitable for a specific type of LED light source, cannot be widely applied to a low-voltage mercury lamp or an excimer lamp which needs to control intensity through adjusting alternating frequency and duty ratio and can generate ozone for space sterilization, so that the system is applicable to limited scenes. The Chinese patent application with the publication number of CN120789317A constructs an initial model based on three-dimensional point cloud data and reflectivity characteristics, disinfects an object to be disinfected according to an ultraviolet dose space distribution diagram, dynamically corrects an ultraviolet radiation field attenuation model based on irradiance feedback data of the object to be disinfected during disinfection to obtain