HTF (A) fire high temperature smoke exhaust fan, axial flow mechanism, the gas flows parallel to the fan shaft, has the characteristics of large air volume, low noise, etc. The insulation grade F motor is adopted, and the motor cooling system is equipped with, which avoids direct contact between the airflow and the motor, reduces harmful gases, and the damage of high-temperature gases to the motor. 2. HTF (A) fire high temperature smoke exhaust axial flow fan has been tested and qualified by the “Fire Equipment Quality Supervision and Inspection Center”. Its performance has reached the domestic level. It has been recognized by the fire departments of more than 30 provinces and cities, and has won many honors, and has become the first recommended product for key projects in China. 3. Excellent performance: The fan test meets the requirements of GBJ45-82 fire protection standard. The fan is designed and manufactured, the motor is built-in, and the motor is equipped with an independent cooling system. It can operate continuously for more than 120 minutes at 300℃ high temperature and 22 hours/time without damage at 100℃ temperature, and the performance is higher than the standard. 4. Application: According to the different requirements of users, single-speed, two-speed, multi-speed type can be used to achieve the purpose of one machine dual-use (that is, commonly used ventilation and exhaust at high temperature during firefighting); if a dual-speed smoke exhaust fan is selected, the pipeline can usually start the low-speed state, and the fire accident can purchase a high state to provide time for personnel to evacuate in time. The blade type is divided into axial flow type (HTF (A) -I, II) and mixed flow HTF (B) -IG. Roof smoke exhaust type and noise reduction type can also be made. 5. : The CAD software used in this series of fans is a new product designed and developed in cooperation with the company's technical department and relevant colleges and universities. Institutional tests show that the fan efficiency is greater than 85%, and some large machine numbers are greater than 90%, and have the characteristics of a flat efficiency curve, which is conducive to energy saving and environmental protection, and promotes green and low carbon; 6. Easy installation, less space than centrifugal fans: the basic form of the fan is axial fan or mixed flow fan, can be directly connected to the air duct or wall mounted, the installation form can be straight horizontal floor installation and hoisting, floor installation needs to be installed with a shock absorption system; high-strength spring shock pad, rubber shock pad, hoisting spring shock absorption hanger fixed with a screw rod, additional installation The damping system damps the vibration of the machine itself and reduces the vibration force External transmission to prevent the transmission of vibration force and ensure the normal operation of the fan. Fire smoke exhaust fan comprises a bottom plate, the upper end of the bottom plate is provided with a rail and a through hole, the track is located inside the through hole, the upper end of the track is provided with a shell cover, one side of the shell cover is provided with a shell, two ends of the shell cover are rotatably connected with clamping bolts, the other side surface of the shell cover is provided with a page sheet, the lower end of the shell cover is fixedly connected with a roller, and the shell cover is slidably connected with the track through the roller, and the two ends of the shell are fixedly connected with fixing bolts. The lower end of the housing is fixedly connected to the motor, motor Through the arrangement of the clamping bolt, the fixing bolt, the track and the roller, the clamping bolt is manually rotated and opened from the fixing bolt, and then the shell cover and the shell are separated by the roller and the rail, and the effect of convenient cleaning is achieved..