When the impeller rotates, due to the centrifugal force, the wind vane causes the gas to move forward and outward, thereby forming a series of spiral motions. The air between the blades of the impeller rotates spirally and squeezes the gas outside the pump body (inhaled by the suction port) into the side groove. When it enters the side channel, the gas is compressed, and then returns to the blades of the impeller again. Speed ??up the rotation. When air passes through the impeller and the side grooves along a spiral track, each impeller blade increases the degree of compression and acceleration. As the rotation progresses, the kinetic energy of the gas increases, so that the pressure of the gas passing along the side channel further increases. When the air reaches the connection point between the side groove and the discharge flange, the gas is squeezed out of the blade and discharged from the pump body through the outlet muffler.
It is understood that the efficiency of a fan is not only related to its own power, but also directly related to reasonable installation and correct use. Now let the editor introduce the installation method of the fan.
(1) It cannot be reversed. Since the fan uses a three-phase power supply, changing any two wiring positions will change the direction of rotation. If you do not pay attention to the correct direction of rotation, the installation direction will be exactly the opposite in the case of reversal. Although the air can also be exhausted at this time, the exhaust The air volume will be particularly small.
(2) Install in the same direction as natural wind. The fan uses the principle of negative pressure to ventilate. It draws air outward. If it is installed in a different direction from the wind, it will offset the natural wind and weaken its exhaust effect. When used under high temperature and strong wind, the effect may be counterproductive.
(3) Install the high-pressure fan at the highest point possible. In this way, exhaust and hot air from the uppermost layer of the room can be effectively pumped away, and the efficiency will be increased.
(4) Easy to operate and control. The fan has a large power and a large suction force, which is a very dangerous electrical equipment. The switch should be set in a position that is easy to operate. If there are two fans, two switches should be set so that the amount of ventilation can be easily controlled according to needs.
(5) Prevent short circuit of air flow. The wind power of the wind turbine is not only related to its own power, but also to the environment of use. The indoor passage is well sealed and the suction force is large; the sealing is poor and the suction force is small. This is because when the channel has multiple air inlets, it first forms air convection with the nearest air inlet, and the air inlet in the channel farther from the fan will have a small air intake. That is, there is an airflow short-circuit phenomenon. When in use, be sure to close the doors and windows closest to the fan (a little wind in the nearest place will seriously affect the efficiency of the fan), and close all floor windows, side windows, and side windows within half of the near end of the fan. The sky side is closed and the distal part is fully opened, so that a large wind speed can be formed in the channel, which is beneficial to the ventilation and cooling of the middle part.
(6) Flexible use. When the need for ventilation is not great, fans can be used directly on the basis of lateral ventilation to reduce labor intensity. When a large amount of ventilation is needed, close the doors and windows at the near end and open the far end.
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