The automotive seat ventilation fan series primarily refers to air circulation devices that are either integrated into the seat or used as standalone accessories. These devices are designed to remove heat and moisture from the body surface through airflow, thereby enhancing driving comfort. Based on technical principles and application scenarios, they are mainly divided into two categories: original factory built-in systems and aftermarket portable fans.

1. Original factory built-in seat ventilation system

 This is a common feature in mid-to-high-end car models. The fan is concealed beneath the seat foam and leather, resulting in a neat appearance and an enhanced experience.

Working principle:

 Air blowing (supply air) type: The fan pressurizes the air inside the cabin and blows it towards the human body through the perforated leather on the surface of the seat. It is characterized by fast cooling speed (10-15°C drop in 3 minutes), but the wind sensation may be more pronounced, and the noise is relatively louder. It is commonly seen in vehicles of 200,000 or lower levels.

 Suction type (draft type): The fan generates negative pressure to draw away the hot and humid air from the contact surface between the seat and the body. It is characterized by gentle sensation, low noise, and good uniformity, and is commonly used in luxury car models (such as the Mercedes-Benz S-Class, BMW 7 Series, etc.).

 Hybrid/semiconductor cooling: Some high-end models (such as Tesla and BMW i7) incorporate liquid cooling cycles or semiconductor cooling chips to achieve active cooling rather than mere ventilation, ensuring more precise temperature control.

Core components:

 Silent centrifugal fan: Typically, each seat is equipped with 4-9 axial flow fans, with a requirement for noise level to be less than 50 decibels during no-load operation.

 Ventilation layer and airflow guiding structure: Utilizing 3D woven materials or honeycomb structures, ensuring uniform airflow distribution and preventing localized overcooling.

 Intelligent control module: Supports multi-level adjustment, can be linked with the vehicle's air conditioning, and features low voltage protection, overheat protection, and other functions.

 Advantages: Beautiful appearance, high durability (tested millions of times), and high integration with the vehicle's electrical system.

2. After-installed portable/external fan series

 Suitable for vehicles without original ventilation function, or standalone devices powered by USB/cigarette lighter.

Main types:

 Headrest/Backrest Clip-on Fan: It can be directly clipped onto the headrest rod or seat backrest. With a dual-head or multi-head design, it can rotate 360 degrees, making it suitable for cooling the neck of rear passengers or drivers.

 Cushion-type ventilation pad: It is placed on the original car seat and features multiple built-in small fans powered by USB, which blow air into the space beneath the cushion. It should be noted that some products may have reduced air duct efficiency due to internal lining obstruction.

 Gap-inserting fan: With a slim design, it can be inserted into the gap between seats for targeted cooling.