Can car sun visors really reduce the temperature inside the car?

First, let’s understand the principle of sun visors.

The sun visor is on the front windshield and rear windshield of the car. It is designed to avoid the glare of the sun. It can be moved back and forth to adjust the sunlight exposure to the eyes and avoid traffic accidents.

The sun visor prevents direct sunlight from reaching items and accessories in the car, and achieves cooling through reflection. So if we test the same car model, with or without the sun visor, will the temperature inside the car really change?

Prepare two cars of the same model and park them in a place where they can be exposed to the sun. One car was equipped with a sun visor and the other was not. After being exposed to the scorching sun at noon, we found that the temperature inside the car with the sun visor was lower than the temperature outside the car and the temperature inside the car without the sun visor. But as time goes by, The temperature of the two cars will gradually increase, and within 30 minutes it will exceed the outside temperature of the car.

When the outside temperature reaches 39.2 degrees, the air temperature inside the vehicle with sun visors is 48.9 degrees, while the air temperature inside the vehicle without sun visors is 51.6 degrees, a difference of less than 3 degrees. Sitting in the car in an environment of 50 degrees, it is estimated that we are already too hot to distinguish the 3 degrees temperature difference. In other words, the sun visor basically cannot block the increase in air temperature inside the car.

In fact, many tests on the Internet have proven that the sun visor cannot reduce the temperature inside the car very well when exposed to the sun, but the sun visor can greatly reduce the temperature of the central control and steering wheel. This makes driving You won't get your hands hot on the steering wheel. In addition, the instrument panels of most cars are made of plastic. Direct exposure to high temperatures for a long time will produce unpleasant odors and toxic substances. Data shows that the steering wheel is at the center console, and the sun visor plays the greatest role in preventing direct sunlight from shining on the instrument panel. Prevent interior deterioration.