Photocatalysis air purifier using light emitting diode as light source

Abstract

The invention discloses a photocatalytic air purifier which takes a light-emitting diode as light source, a dust-resistant filter net which is detachable and easy to clean is arranged at an air inlet which is arranged on the lower part of a shell body of a purifier, the dust-resistant filter net which is detachable and easy to clean is arranged at an air outlet which is arranged on the upper part of the shell body; a light-emitting diode array which is taken as the light source and a photocatalytic layer are parallelly arranged in the shell body, the photocatalytic layer is composed of a modified titanium dioxide photocatalyst which is loaded on an activated carbon fiber; the photocatalytic layer of the air purifier simultaneously has the effects of absorption enrichment and photocatalytic degradation of volatile organic compounds, thereby effectively improving the efficiency of the photocatalytic degradation; the light-emitting diode array is adopted as the light source, thereby overcoming the defect of uneven illumination of an ultraviolet lamp tube and being characterized by high optical to electrical conversion rate, long service life and high space and time efficiency, the high-low arrangement of the light-emitting diode array and the photocatalytic layer utilizes the characteristic that gas is raised after heating to realize the effective convection of air without a fan, thereby reducing the energy consumption and simplifying the device.

Description

technical field [0001] The invention belongs to the technical field of air purification, and in particular relates to an air purifier for photocatalytically degrading harmful gases such as volatile organic compounds based on a light emitting diode array as a light source. Background technique [0002] Studies have shown that volatile organic compounds such as benzene series, aldehydes, esters, halogenated hydrocarbons, etc. have great chemical toxicity and triple effects. The pollution level of most volatile organic compounds in the indoor environment is 5 to 10 times that of the outdoor environment. times, sometimes even up to 100 times, and bacteria and viruses in the air also endanger the health of indoor personnel, and people spend most of their time indoors, indoor air quality is closely related to human health, so the removal of volatile organic compounds in indoor air is of great importance meaning. [0003] At present, the purification technologies of VOCs (volatile...

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Problems solved by technology

[0007] Existing photocatalytic air devices, such as the air purifiers disclosed in Chinese invention patent ZL200310100485.3 and utility model patent ZL200620054100.3, use ultraviolet lamps and supporting high-voltage power sources as light sources, and have a large volume and photocatalytic layer Disadvantages such as uneven light receiving area, short service life, and low electro-optical conversion efficiency

[0008] The automobile air purifier disclosed in the utility model patent ZL200420005893.0 requires a forced convection fan, which increases the complexity and energy consumption of the device, and makes the residence time of the air in the clean room not long enough, resulting in the problem of incomplete degradation

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