Tunnel-type evaporative-condensation direct-expansion cooling-air type ventilation and air-conditioning system for subway station

Abstract

The invention relates to a tunnel-type evaporative-condensation direct-expansion cooling-air type ventilation and air-conditioning system for a tunnel of a subway station. The tunnel-type evaporative-condensation direct-expansion cooling-air type ventilation and air-conditioning system comprises a ventilation power system, an air-purifying system and a refrigeration air-conditioning system.The tunnel-type ventilation and air-conditioning system is used for placing ventilation, air-purifying and refrigerating systems into a civil engineering tunnel. With no special machine room required, civil-engineering areas and investment are saved. Without requiring cooling towers, the system does not influence surrounding environment and daily life of nearby residents because positions on the ground are occupied by cooling towers, thereby making a harmonious environment.In the meantime, the ventilation and air-conditioning system performs automatic switchover to operate in an energy-saving mode in accordance with year-round climate changes and starts up or shuts down an air-purifying device based on the requirement for indoor air quality in order to indoor clean operation. The ventilation and air-conditioning system can automatically switch over to safely operate based on running states, including ventilation, air-conditioning and disaster-control, of the subway station or underground space.

Description

technical field [0001] The invention relates to a ventilation and purification air-conditioning system for subway stations and underground spaces, in particular to a tunnel-type evaporation-condensation direct-expansion cold-air ventilation and air-conditioning system for subway stations. Background technique [0002] The traditional subway station ventilation and air conditioning system adopts the system of "water-cooled chiller + cooling tower + combined air conditioning unit". In the bustling areas with high urban population density, setting cooling towers on the ground in this area will damage the urban landscape and affect the daily life and rest of nearby residents; secondly, the water-cooled chillers in the traditional system need to be placed outside the civil air duct of the subway station Set up a special machine room, increase the amount of civil engineering excavation and the proposed investment; third, the traditional "water-cooled chiller + cooling tower + comb...

AI Technical Summary

Problems solved by technology

[0002] The traditional subway station ventilation and air conditioning system adopts the system of "water-cooled chiller + cooling tower + combined air conditioning unit". In the bustling areas with high urban population density, setting cooling towers on the ground in this area will damage the urban landscape and affect the daily life and rest of nearby residents; secondly, the water-cooled chillers in the traditional system need to be placed outside the civil air duct of the subway station Set up a special machine room, increase the amount of civil engineering excavation and the proposed investment; third, the traditional "water-cooled chiller + cooling tower + combined air-conditioning unit" system needs to go through multiple cycles and heat exchange to discharge the heat and humidity load in the air to the outside , the number of heat exchanges is large, the heat exchange attenuation is large and fast, and the overall energy efficiency of the system is low

Although the technical solution of this utility model solves the problem that the cooling tower of the ventilation and air-conditioning system of the subway station occupies a large amount of ground space, the ventilation and air-conditioning system protected by the technical solution still needs to go through multiple cycles and heat exchange to obtain the expected ventilation and temperature control effect. The problem of high energy consumption in the operation of ventilation and air conditioning systems in subway stations has not yet been solved

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