Ventilation systems, indoor units, and air conditioners

Abstract

One embodiment of the ventilation device according to the present disclosure comprises a protective housing that encloses at least a portion of a refrigerant circuit through which a refrigerant circulates, an intake port for taking in outside air into the protective housing, an exhaust port for discharging gas from the inside of the protective housing, and a fan that generates an airflow that passes from the intake port through the inside of the protective housing and is exhausted from the exhaust port, wherein the exhaust direction at the exhaust port is different from the intake direction at the intake port, and the arrangement of the exhaust port is optimized according to the wind velocity U of the gas drawn in from the exhaust port and the density ρ1 of the refrigerant gas.

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