Heat recovery type dry and wet two-stage filtration indirect-direct composite evaporative cooling fresh air unit

Abstract

The invention discloses a heat recovery dry-wet two-stage filtering indirect-direct composite evaporative cooling fresh air handling unit. The fresh air handling unit comprises a unit shell; an air intake / exhaust combined unit and an air supply unit are respectively arranged on two opposite side walls of the unit shell; a dry-wet two-stage air filtering-air exhausting combined system is arranged in the unit shell near the air intake / exhaust combined unit; an air supply unit is arranged in the unit shell near the air supply unit; and an all-heat heat recoverer, a layered water distribution type indirect evaporative cooler and a spray type direct evaporative cooler are arranged between the dry-wet two-stage air filtering-air exhausting combined system and the air supply unit in sequence. The heat recovery dry-wet two-stage air filtering indirect-direct composite evaporative cooling fresh air handling unit can perform dry-wet two-stage filtering on inlet air, improves the structure, material and water distribution mode of an indirect evaporative cooling heat exchanger, adds an energy recovery device, and adopts spray type direct evaporative cooling, thereby improving the quality of prepared fresh air and the energy-saving efficiency of the unit.

Description

technical field [0001] The invention belongs to the technical field of air-conditioning equipment, and in particular relates to a heat recovery type dry-wet two-stage filter indirect-direct composite evaporative cooling fresh air unit. Background technique [0002] At present, common fresh air units are mainly divided into three types: one-way flow, two-way flow and full heat exchange units. Among them, the one-way flow fresh air unit adopts the method of "forced exhaust and natural air intake". The two-way flow fresh air unit adopts the method of "forced exhaust and forced air supply", and compared with the one-way flow fresh air unit, the fresh air filter is added, which improves the quality of fresh air accordingly. Based on an optimization, the fresh air quality and energy saving are better; however, in the actual application process, due to the influence of various factors, there are still some problems, such as: insufficient air filtration, blockage of heat recovery d...

AI Technical Summary

Problems solved by technology

The two-way flow fresh air unit adopts the method of "forced exhaust and forced air supply", and compared with the one-way flow fresh air unit, the fresh air filter is added, which improves the quality of fresh air accordingly. Based on an optimization, the fresh air quality and energy saving are better; however, in the actual application process, due to the influence of various factors, there are still some problems, such as: insufficient air filtration, blockage of heat recovery device, difficult cleaning And the problem of low quality of fresh air

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