Turbulent flow synergistic structure for improving efficiency of FUV light source sterilizer

Abstract

The utility model relates to a turbulent flow synergistic structure for improving the efficiency of an FUV light source sterilizer. The existing FUV light source sterilizer has the problems of attenuation of sterilization capacity along with distance, disinfection dead angles, insufficient utilization of circulating airflow and the like. By optimizing the light source layout and airflow control, the utility model provides a turbulent flow synergistic structure, so that the residence time of airflow in an irradiation area is prolonged, and the sterilization efficiency is improved. According to the specific scheme, an FUV excimer light source is installed in a rectangular lampshade, and the depth of the side wall of the lampshade needs to meet the specific angle requirement; a fan is installed on the side wall of the lampshade to form directional airflow or transverse turbulent flow. The sterilization efficiency of the space can be effectively improved, the sterilization dead angle is eliminated, the structure is compact, and the device is suitable for various scenes.

Description

Technical Field

[0001] This utility model relates to the field of ultraviolet sterilization technology, specifically to a device for improving the efficiency of far-ultraviolet (FUV) sterilizers through structural improvements, and particularly to a structural design that enhances the irradiation effect of FUV light sources through turbulence enhancement. Background Technology

[0002] Far-ultraviolet (FUV, wavelength 190-230nm) light is widely used in low-temperature sterilization due to its high safety. However, existing FUV sterilizers have the following problems:

[0003] Sterilization effectiveness decreases with distance: FUV light has weak penetrating power, resulting in a significant decrease in sterilization effect in areas far from the light source. According to relevant data, a krypton chloride excimer FUV light source component with a power of 11W and a 254nm harmful light filter has an illuminance of 14mw / cm² on its emitting surface. 2 When placed in air, the illuminance at a distance of 1000mm from the luminescent surface is 0.014mw / cm². 2 The illuminance at a distance of 1500mm from the luminescent surface is 0.006mw / cm². 2 The illuminance at a distance of 2000mm from the luminescent surface is 0.002mw / cm². 2 The light intensity exhibits a rapidly decreasing linear curve within a distance of 1000 mm, and a rapidly decreasing parabolic curve beyond that distance. The killing dose for Campylobacter jejuni was 4 mJ / cm². 2 For example, if the virus is emitted from the excimer light source of krypton chloride, the time to kill the virus is only 4 / 14 = 0.29s; at a distance of 1000mm, the time to kill the virus is only 4 / 0.014 = 286s; at a distance of 1500mm, the time to kill the virus is 4 / 0.006 = 667s; and at a distance of 2000mm, the time to kill the virus is 4 / 0.002 = 2000s.

[0004] Disinfection dead spots: Due to the limited angle of light source radiation, areas under indoor coverings or in corners are difficult to be effectively irradiated.

[0005] Insufficient utilization of circulating airflow: Traditional methods rely on natural airflow. Due to the fact that the sterilization ability of FUV light source sterilizers decreases with distance, coupled with disinfection dead corners and insufficient utilization of circulating airflow, the efficiency of FUV light source sterilizers is low, and there is a large amount of unirradiated airflow.

[0006] While adding a stirring fan can improve airflow in existing technologies, it suffers from drawbacks such as high noise levels, high energy consumption, and limited application scenarios. Therefore, there is an urgent need for a structural optimization scheme to improve the irradiation efficiency and coverage of FUV light sources. Summary of the Invention

[0007] Purpose of the invention

[0008] To address the problems of low sterilization efficiency and the existence of sterilization dead zones in existing FUV light source sterilizers, this utility model proposes a design scheme that enhances the irradiation effect through a turbulent flow enhancement structure. By optimizing the light source layout and airflow control, the residence time of the airflow in the irradiation area is extended, thereby improving sterilization efficiency.

[0009] Technical solution

[0010] The technical solution of this utility model is as follows:

[0011] Light source and lampshade structure

[0012] The FUV excimer light source (such as the krypton chloride excimer light source with a main peak of 222nm) is installed inside a rectangular lampshade. The depth (D) of the lampshade sidewall must meet specific angle requirements to avoid blocking the radiation of the light source.

[0013] For a light source with a radiation angle of 120°, the angle between the lower edge of the lampshade sidewall and the boundary of the light source's irradiation plane is ≤30°; for a light source with a radiation angle of 60°, this angle is ≤60°.

[0014] Turbulence enhancement device

[0015] Fans are installed on two or four side walls of the rectangular lampshade, with the fan blowing air at an angle to the surface of the light source.

[0016] The fan can blow air outward to form a directional airflow from bottom to top, or blow air inward to form a lateral turbulence, generating vortex airflow near the light-emitting surface of the light source and prolonging the airflow residence time.

[0017] Light source and fan configuration

[0018] FUV light sources can be selected from excimer light sources with a main peak of 207-230nm (such as krypton bromide or krypton chloride), and filters can be installed to filter out non-target wavelengths.

[0019] The fan uses either an axial flow fan or a vortex flow fan, and is controlled via a microcontroller (MCU) to adjust the fan speed and operating mode. Attached Figure Description

[0020] Figure 1This is a front view of the radiation state of an FUV excimer laser source. In the diagram: 1 is the room (space); 2 is the power supply section of the FUV excimer laser source; 3 is the light-emitting device (lamp) assembly of the FUV excimer laser source (FUV excimer lamps are installed internally); 4 is the emitting surface of the FUV excimer laser source (rectangular emitting surface); A is the radiation angle. The irradiation dead angle of the FUV excimer lamp; A+B is the radiation angle. The irradiation dead angle of the FUV excimer lamp; E is the outer edge of the FUV excimer lamp cover.

[0021] Figure 2 This is a front view of the radiation status of an FUV excimer laser sterilizer. Figure 2 In the diagram: 1 is the room (space); 2 is the power supply section of the FUV excimer light source; 3 is the light-emitting device (lamp) assembly of the FUV excimer light source (FUV excimer lamps are installed inside); 4 is the light-emitting surface (rectangular light-emitting surface) of the FUV excimer light source; 5 is the lampshade of the FUV excimer light source; 6 is the electrical compartment of the FUV excimer light source; E is the outer edge of the lampshade of the FUV excimer light source; F is the outer edge of the light-emitting surface of the FUV excimer light source. Radiation angle is The angle between the 120° irradiation line of the FUV excimer light source irradiation plane boundary (E) and the horizontal plane (line); Is it the radiation angle? The angle between the 60° irradiation line and the horizontal plane (line) of the FUV excimer light source irradiation plane boundary (E); A is the radiation angle. The irradiation dead angle of the FUV excimer lamp; A+B is the radiation angle. The irradiation dead angle of the FUV excimer lamp; D is the width (or depth) of the FUV excimer lamp cover.

[0022] Figure 3 This is a top view of the FUV excimer laser sterilizer from the direction of the irradiation surface. Figure 3 In the diagram: 3 is the light-emitting device (lamp) assembly of the FUV excimer light source (FUV excimer lamp is installed inside); 4 is the light-emitting surface (rectangular light-emitting surface) of the FUV excimer light source; 5 is the lamp cover of the FUV excimer light source; 6 is the electrical compartment of the FUV excimer light source; 7 is the fan; the dashed double arrow in the diagram indicates the airflow direction of the fan; E is the outer edge of the lamp cover of the FUV excimer light source; F is the outer edge of the light-emitting surface of the FUV excimer light source.

[0023] Figure 4 yes Figure 2 A front view of the radiation status of an FUV excimer laser sterilizer equipped with a fan. Figure 4In the diagram: 1 is the room (space); 2 is the power supply section of the FUV excimer light source; 3 is the light-emitting device (lamp) assembly of the FUV excimer light source (FUV excimer lamps are installed inside); 4 is the light-emitting surface (rectangular light-emitting surface) of the FUV excimer light source; 5 is the lampshade of the FUV excimer light source; 6 is the electrical compartment of the FUV excimer light source; 7 is the fan; E is the outer edge of the lampshade of the FUV excimer light source; F is the outer edge of the light-emitting surface of the FUV excimer light source. Radiation angle is The angle between the 120° irradiation line of the FUV excimer light source irradiation plane boundary (E) and the horizontal plane (line); Is it the radiation angle? The angle between the 60° irradiation line and the horizontal plane (line) of the FUV excimer light source irradiation plane boundary (E); A is the radiation angle. The irradiation dead angle of the FUV excimer lamp; A+B is the radiation angle. The irradiation dead angle of the FUV excimer lamp; D is the width (or depth) of the FUV excimer lamp cover.

[0024] Figure 5 This is a front view of the radiation pattern in an FUV excimer laser sterilizer when the airflow blows outward from the radiating surface. Figure 5 In the diagram: 1 represents the room (space); 2 represents the power supply section of the FUV excimer light source; 3 represents the light-emitting device (lamp) assembly of the FUV excimer light source (with FUV excimer lamps installed inside); 4 represents the light-emitting surface (rectangular light-emitting surface) of the FUV excimer light source; 5 represents the lampshade of the FUV excimer light source; 6 represents the electrical compartment of the FUV excimer light source; E represents the outer edge of the lampshade of the FUV excimer light source; the dashed single arrow in the diagram indicates the airflow direction of the fan.

[0025] Figure 6 This is a front view of the radiation pattern in an FUV excimer laser sterilizer as the airflow blows from the outside towards the radiating surface. Figure 6 In the diagram: 1 represents the room (space); 2 represents the power supply section of the FUV excimer light source; 3 represents the light-emitting device (lamp) assembly of the FUV excimer light source (with FUV excimer lamps installed inside); 4 represents the light-emitting surface (rectangular light-emitting surface) of the FUV excimer light source; 5 represents the lampshade of the FUV excimer light source; 6 represents the electrical compartment of the FUV excimer light source; E represents the outer edge of the lampshade of the FUV excimer light source; the dashed single arrow in the diagram indicates the airflow direction of the fan.

[0026] Figure 7 This is a 3D model of the krypton chloride excimer light source designed according to this scheme. Figure 7In the diagram: 3 is the light-emitting device (lamp) assembly of the FUV excimer light source (xenon chloride excimer light source) (containing four xenon chloride excimer lamps); 4 is the rectangular (square) light-emitting surface of the FUV excimer light source (xenon chloride excimer light source) formed by the four excimer lamps; 5 is the FUV excimer (xenon chloride excimer) lamp cover; 6 is the electrical compartment of the FUV excimer light source (xenon chloride excimer light source); 7 is the fan; 8 is the antenna; 9 is the power cord connector; 10 is the power switch. D is the width (or depth) of the FUV excimer light source (krypton chloride excimer light source) lamp cover; E is the outer edge of the FUV excimer light source (krypton chloride excimer light source) lamp cover; F is the outer edge of the light-emitting surface of the FUV excimer light source (krypton chloride excimer light source). Detailed Implementation

[0027] The following describes the implementation of this utility model in conjunction with specific examples:

[0028] Example 1

[0029] A krypton chloride excimer light source with a main peak of 222nm and a radiation angle of 60° was selected and installed inside a rectangular lampshade.

[0030] Adjust the depth of the lampshade sidewall so that the angle between the light source irradiation boundary and the lower edge of the lampshade is ≤60° to ensure no light obstruction.

[0031] Example 2

[0032] Axial fans are installed on both sides of the lampshade, with the airflow direction forming a 45° angle with the light-emitting surface of the light source, creating transverse turbulence.

[0033] By setting an intermittent operating mode through the MCU controller, energy consumption can be reduced and equipment lifespan can be extended.

[0034] Example 3

[0035] For large-area disinfection scenarios, a four-fan layout is adopted to blow air outwards, forming a directional airflow from bottom to top, thereby enhancing the airflow circulation in the irradiated area.

[0036] This utility model achieves the following advantages through optimized lampshade structure and turbulence-enhancing design:

[0037] Extending the residence time of airflow in the irradiated area increases sterilization efficiency by more than 30%.

[0038] Eliminate blind spots in disinfection and expand the effective irradiation range.

[0039] With its compact structure, it is compatible with various light sources and fan types, making it suitable for medical, cold chain and other scenarios.

Claims

1. A turbulent flow enhancement structure for improving the efficiency of an FUV light source sterilizer, characterized in that, include: An FUV excimer light source (3) is installed inside a rectangular lampshade (5). The FUV excimer light source has a specific radiation angle. The side wall depth (D) of the rectangular lampshade (5) meets specific angle requirements to avoid blocking the radiation of the light source. For a light source with a radiation angle of 120°, the angle between the lower edge of the side wall of the rectangular lampshade (5) and the boundary of the irradiation plane of the light source is ≤30°. For a light source with a radiation angle of 60°, the angle is ≤60°. The turbulence enhancement device includes fans (7) installed on two or four side walls of a rectangular lampshade (5). The direction of the fans (7) forms an angle with the radiation surface of the light source. They can blow air outward to form a directional airflow from bottom to top, or blow air inward to form a transverse turbulence, generating vortex airflow near the light-emitting surface of the light source and prolonging the airflow residence time.

2. The turbulent flow enhancement structure for improving the efficiency of an FUV light source sterilizer according to claim 1, characterized in that, The FUV light source can be an excimer light source with a main peak of 207-230nm, and a filter is installed to filter out non-target wavelength light.

3. The turbulent flow enhancement structure for improving the efficiency of an FUV light source sterilizer according to claim 1, characterized in that, The fan (7) is an axial flow fan or a vortex fan, and is controlled by a microcontroller via wired / wireless means to adjust the wind speed and working mode.

4. The turbulent flow enhancement structure for improving the efficiency of an FUV light source sterilizer according to claim 1, characterized in that, The blowing direction of the fan (7) forms a 90° angle with the light-emitting surface of the light source, creating a transverse turbulence.

5. The turbulent flow enhancement structure for improving the efficiency of an FUV light source sterilizer according to claim 1, characterized in that, For large-area disinfection scenarios, a four-fan layout is adopted to blow air outwards, forming a directional airflow from bottom to top, thereby enhancing the airflow circulation in the irradiated area.

6. The turbulent flow enhancement structure for improving the efficiency of an FUV light source sterilizer according to claim 1, characterized in that, The light-emitting surface (4) of the FUV excimer light source (3) is a rectangular light-emitting surface.

7. The turbulent flow enhancement structure for improving the efficiency of an FUV light source sterilizer according to claim 1, characterized in that, It also includes the electrical compartment (6) and power supply section (2) of the FUV excimer light source.

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