Fresh air handling unit

Abstract

The invention discloses a fresh air handling unit. The fresh air handling unit comprises a fan segment and a surface cooling, reheating and air supply segment, wherein a variable frequency motor and a centrifugal fan are arranged in the fan segment sequentially; and a water cooled coil pipe and a directly evaporative type coil pipe are arranged in the surface cooling, reheating and air supply segment. The novel fan unit is characterized in that: a filtering segment is arranged in front of the fan segment; a filter device is arranged in the filtering segment; the filter device comprises a filter cartridge which is arranged in the fan unit through a filter bracket; a pulse blowback device is arranged at an air outlet of the filter cartridge; and a dust collecting device is arranged below the filter cartridge. Through the arrangement of the filter device, the fresh air handling unit has the advantages of capability of performing self-cleaning filter, improvement on air quality and convenient maintenance.

Description

technical field [0001] The invention relates to an air conditioning system, in particular to a fresh air unit at the end of the air conditioning system, especially suitable for public places such as rail transit stations. Background technique [0002] With the continuous development of society, rail transit, as a safe, comfortable, fast and punctual means of transportation, has begun to develop rapidly. As transportation hubs and distribution centers, rail transit stations in big cities are crowded with people, and the daily passenger flow of large transfer stations is as high as 100,000 to 400,000 passengers. For those rail transit stations that were put into operation earlier, because the actual passenger flow far exceeds the original design passenger flow, it will affect the air quality of the platform and station hall, making the air quality problems of the station hall and platform of these stations more prominent. The types of air pollution in rail transit stations ar...

AI Technical Summary

Problems solved by technology

[0004] At present, rail transit stations continue to use the traditional fresh air and dust removal technology, and filter the air by setting filters in the fresh air device. During the use of the equipment, the filter accumulates more and more dust, and the resistance of the air passing through the filter increases. When the filter resistance increases to the set value (usually twice the initial resistance), the controller sends out an indication and an alarm signal, prompting to replace the filter, and manually replace the filter. Due to the old equipment, it is difficult to remove the pollutants in the station. Or the odor is reduced from a high concentration to an acceptable level, and the filter needs to be replaced manually, making equipment maintenance difficult

Although each rail transit station has strengthened the quality control of the station environment and adopted many new purification methods, the actual effect is not very satisfactory. Therefore, a new air purification device suitable for rail transit stations is designed to further improve the quality of the station. Air quality has become an urgent problem in the industry

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