Direct evaporation type air cooling type fresh air unit

Abstract

Disclosed is a direct evaporation type air cooling type fresh air unit. An inlet air valve (13) is arranged at one end of an air conditioning cabinet (1), an air filter (14) is arranged on the inner side of the inlet air valve, a fan (2) is arranged at the other end of the air conditioning cabinet, a first-level refrigerating system, a second-level refrigerating system and a third-level refrigerating system are arranged, the first-level refrigerating system is provided with a first refrigerating circuit, a second refrigerating circuit and a third refrigerating circuit, the first refrigerating circuit, the second refrigerating circuit and the third refrigerating circuit can independently or simultaneously run, a first-level evaporator (11) shared by the first refrigerating circuit, the second refrigerating circuit and the third refrigerating circuit is arranged in the air conditioning cabinet, the second-level refrigerating system is provided with a fourth refrigerating circuit and a fifth refrigerating circuit, the fourth refrigerating circuit and the fifth refrigerating circuit can independently or simultaneously run, a second-level evaporator (6) shared by the fourth refrigerating circuit and the fifth refrigerating circuit is arranged in the air conditioning cabinet, and the third-level refrigerating system is composed of a sixth refrigerating circuit, and a third-level evaporator (4) is arranged in the air conditioning cabinet. The unit can stably run under the wide weather condition, the dehumidification requirement of the air conditioning system is met, the air supply comfort is improved, and moisture condensation is prevented from happening to an air outlet.

Description

technical field [0001] The invention relates to a fresh air unit, specifically a direct evaporative air-cooled fresh air unit based on temperature and humidity independent control of the air conditioning system. Background technique [0002] Central air-conditioning system energy saving is an important part of building energy saving. The air-conditioning system with independent temperature and humidity control is a form of air-conditioning system that has developed rapidly in recent years. It uses two independent systems to control and adjust indoor humidity and temperature respectively, avoiding conventional The waste of energy and the reduction of air quality caused by the combined treatment of temperature and humidity in the system. The advantages of temperature and humidity independent control air conditioning system in building energy saving have been understood and accepted by more and more people in the HVAC industry, and have been more and more applied in actual ...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the characteristics that the existing direct evaporative air-cooled fresh air unit cannot meet the fresh air treatment requirements of the air-conditioning system with independent temperature and humidity control when the outdoor meteorological conditions change, the present invention provides a direct evaporative air-cooled fresh air unit, which can not only make the unit Stable operation under wide weather conditions, meet the dehumidification requirements of the air conditioning system, can also improve the comfort of air supply, and prevent condensation at the air outlet

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