Patent Name: Turbocharged Microcirculation Variable-Frequency Noise Reduction Ventilation System; Patent No.: 200520108948.5

This system is a patented technology customized specifically for full anechoic chambers. Its core design integrates "dual noise-reducing ventilation ducts + an air layer inside the chamber shell" to construct an efficient microcirculation ventilation system, achieving the dual unification of ventilation functionality and noise reduction requirements. It is a key supporting component that ensures the acoustic stability and operational comfort of the anechoic chamber. 

The system takes two independent noise-reducing ventilation ducts as the core carriers, which are interconnected with the reserved air layer inside the anechoic chamber shell to form a closed-loop air circulation channel between indoor and outdoor spaces. This innovative structural design is equivalent to integrating four large-scale impedance composite mufflers. Through the multi-layer noise-reducing structures built into the ducts and the buffering and attenuation effect of the air layer, it can effectively block external environmental noise (such as air disturbance noise and external ambient noise) from entering the chamber, avoiding interference with precision acoustic measurements. Meanwhile, it enables smooth and uniform air exchange between indoor and outdoor environments, effectively regulating indoor air humidity and air pressure to provide a comfortable working environment for personnel engaged in long-term operations, while ensuring the stable operation of test equipment under suitable environmental conditions. 

In addition, the system is equipped with turbocharging technology and an intelligent variable-frequency control module. It can flexibly adjust the ventilation volume according to actual needs such as the number of indoor personnel and the operating status of equipment, realizing on-demand air supply. At the same time, it adopts a low-noise operation design—by optimizing air flow channels and selecting silent components, it minimizes its own operational noise. It forms a synergistic effect with the anechoic chamber’s sound absorption and vibration isolation systems, ensuring that the realization of ventilation functionality does not affect the stability of the indoor acoustic environment.   

Core Advantages Comparison   

Compared with traditional ventilation systems: Traditional systems mostly adopt single-duct ventilation with simple noise reduction structures, which are prone to noise leakage or uneven ventilation. This patented system, through the composite design of dual ducts + air layer, achieves more thorough noise reduction and significantly improved ventilation efficiency, meeting the stringent requirements of both acoustic isolation and air circulation simultaneously.   

Compared with ordinary noise-reducing ventilation equipment: Ordinary equipment lacks intelligent regulation functions, with fixed ventilation volume that is difficult to adapt to different scenario requirements. The variable-frequency control technology of this system enables dynamic adjustment of ventilation volume, balancing energy efficiency and practicality. Moreover, the turbocharging design further enhances air circulation power, avoiding air flow dead zones indoors.   

Compared with non-patented customized systems: Non-customized systems often suffer from poor structural adaptability and insufficient synergy with the overall acoustic system of the anechoic chamber. This patented system is developed specifically for anechoic chamber scenarios, with a structural design highly matched to acoustic requirements. It ensures that ventilation functionality does not interfere with core systems such as noise reduction and vibration isolation, jointly maintaining a stable indoor acoustic environment.