
One is the external circulation air intake, located in the box with the air conditioning filter under the front windshield; the other is the internal circulation air intake on the dashboard inside the cabin. Below is an introduction to automotive air conditioning: 1. Introduction to Automotive Air Conditioning: The automotive air conditioning system consists of a compressor, condenser, throttle element, evaporator, fan, and necessary control components, designed to regulate the temperature and humidity inside the vehicle and provide a comfortable environment for the driver. 2. Working Principle: When the compressor operates, it sucks in low-temperature, low-pressure gaseous refrigerant from the evaporator. After compression, the temperature and pressure of the refrigerant increase, and it is sent to the condenser. Inside the condenser, the high-temperature, high-pressure gaseous refrigerant transfers heat to the outside air passing through the condenser, causing it to liquefy into a liquid. When the liquid refrigerant flows through the throttle device, its temperature and pressure decrease, and it enters the evaporator. Inside the evaporator, the low-temperature, low-pressure liquid refrigerant absorbs heat from the cabin air passing through the evaporator and evaporates into a gas. The gas is then sucked back into the compressor to begin the next cycle.









Every time I turn on the air conditioning while driving, I think about the location of the air intake. It's usually right below the windshield, near where the wipers are installed, with a small mesh-like grille opening that mainly draws outside air into the vehicle's system. After driving for over a decade, I've noticed that if that area gets clogged with leaves or debris, the airflow from the AC weakens, and strange odors can easily develop. Once during summer driving, I felt the AC wasn't cooling properly. After stopping to check, I found the intake completely blocked—clearing it immediately improved performance. I remind everyone to regularly inspect that area, especially cleaning it before the leaf-fall season, to avoid reduced AC efficiency and enhance driving comfort. The air intake is designed for efficient air filtration, but don't neglect it—routine saves hassle and money.

Locating the sedan's air conditioning intake vent is actually quite simple. It's hidden at the bottom edge of the windshield - a rectangular mesh opening typically called the air intake grille. I always clean out debris myself to prevent AC cooling or heating issues. When the intake gets clogged, airflow decreases, putting extra strain on the AC compressor. Over time, this increases fuel consumption and may even damage components. I recommend regularly popping the hood to inspect it, using a vacuum or small brush for gentle cleaning. While placement varies slightly by model, most vehicles have it beneath the central wiper. If you can't find it, consult your owner's manual. Keeping the intake clear is crucial for safe, smooth driving.

As a new driver, I initially didn't know where the air conditioning intake was. Later, I learned it's located at the small grille holes beneath the windshield, which function to draw air into the AC unit. Understanding this helps me better maintain cabin air quality, such as preventing blockages that could cause odors. I recommend new drivers take a moment to glance at the front of their car when parking - a simple visual check can easily locate it.

The air intake for the AC is located in the wiper trough below the windshield, with that grille-style opening specifically designed to draw in clean air. I'm always concerned about in-cabin health—if the intake gets blocked, restricted airflow can lead to bacterial growth or pollutant intake during smoggy days. Regular cleaning ensures fresh air circulation, especially during spring and fall when leaves tend to accumulate. Drive in comfort with a well-maintained cabin environment.

The air conditioning intake is mostly located at the mesh opening at the base of the windshield, which serves as the air inlet connected to the AC system. I often encounter clogging issues where accumulated leaves and dust cause a sudden drop in airflow and may even produce noise. The solution is to gently remove the debris to ensure the intake remains unobstructed. Identifying its location is simple and effective, helping to prevent major problems.


