The fresh air ventilator is designed and developed according to the principle that a “fresh air flow field” is formed indoors when air is supplied on one side of a closed room and the other side is induced. It relies on mechanical air supply and induction to force a fresh air flow field in the system. It is a new type of environmentally friendly electrical appliance that keeps the indoor air clean and fresh at all times. The independent indoor air replacement and purification circulation system can input natural fresh air while eliminating indoor polluted air, and the fresh air entering the room is first filtered, sterilized, heated, aerated, etc. Energy recovery fresh air ventilator is a kind of high-efficiency energy-saving air conditioning ventilation device, divided into full heat recovery type (total heat exchanger) and display heat recovery type (display heat exchanger). Its core function is to use the temperature difference and humidity difference of indoor and outdoor air. Through the good energy conversion characteristics of the energy recovery movement, the two-way replacement of ventilation at the same time, energy exchange is generated, so that the fresh air can effectively obtain the enthalpy value (full heat type) or enthalpy value in the exhaust air (full heat type) Temperature (thermal type) Therefore, the energy consumption of fresh air pretreatment is greatly saved, the purpose of energy saving and ventilation is achieved, and the energy saving effect is remarkable. After years of technology research and development, the third generation energy recovery fresh air ventilator has been successfully developed. Its movement adopts the latest technological achievements - the energy recovery module WASSI-III. The superior performance of WASSI-III makes the third generation energy recovery fresh air ventilator surpass previous models in various technical indicators and become the most competitive fresh air ventilator product on the market. 1. A fresh air ventilator is a small ventilation device with a heat recovery device for rooms. The main control parameters selected are air volume, static pressure loss, outlet total pressure, input power, effective ventilation rate, exchange efficiency, noise, etc. 2. The performance of the fresh air ventilator should meet the requirements of Table 1, and the heat exchange efficiency value corresponding to the nominal air volume of the device should not be lower than the requirements of Table 2. 3. Generally speaking, when the fresh air temperature is around -10℃, frost may occur on the exhaust side. An air preheater can be installed in front of the device. 4. The selection of devices should also meet the relevant requirements of other standards and specifications. Qianyu Wangpu https://33372.qianyuwang.com/