Vehicle Air-Conditioning Unit Drain Hole Cooling Structure

A drain hole cover is introduced as an intermediary component between the drain hole and the outside air. The cover includes a drain hole passage that allows condensed water to pass through while preventing outside air from being directly drawn into the air-conditioning case. This mediator structure enables the drain hole to fulfill its water discharge function without compromising the cooling capacity by blocking the path of uncooled outside air.

The drain hole cover acts as an intermediary barrier that separates the drain hole function from the air intake function. By designing the cover with a specific passage structure, it allows condensed water to be discharged while blocking the entry of air containing harmful factors such as smell and smoke into the air-conditioning case, thus improving air quality without complicating the drain hole structure.

The drain hole cover serves as an intermediary structure that modifies the air flow path without changing the blower's suction-type layout. It prevents outside air from being drawn into the air-conditioning case through the drain hole, ensuring that only cooled air from the evaporator is blown into the vehicle interior, thereby maintaining occupant comfort while preserving the compact blower positioning.

The drain hole cover is designed as an intermediary structure that maintains the drain hole's functionality for condensed water discharge while simultaneously preventing outside air from entering the air-conditioning case. The cover's passage allows water to pass through under gravity while blocking the air flow path, ensuring that the drain hole remains functional without compromising cooling performance.