A type of air conditioning appliance in which an electric motor drives the blades to rotate and drive the air flow, so that the indoor and outdoor air exchange. The purpose of ventilation is to remove the dirty air in the room, adjust the temperature, humidity and sensory effect. The ventilation mode of the ventilation fan has three kinds: discharge type, inhalation type and use type.
Louver ventilator is the most widely used ventilator, which is mainly composed of motor, fan blade, frame, panel, shutter and special pull wire switch and other auxiliary components. The motor generally uses single-phase capacitor operation asynchronous motor.
How a ventilator works
1. Basic Principles
Exhaust fan belongs to one kind of axial flow fan. It is mainly used in negative pressure ventilation and cooling engineering and called industrial exhaust fan. Exhaust fan has the characteristics of super large air duct, super wind blade diameter, super large exhaust air volume, ultra-low energy consumption, low speed, low noise and so on.
Use with cooling water curtain can solve the problem of ventilation and cooling at one stroke. Exhaust fan operation process will form a negative pressure environment in the room. If in the exhaust fan outlet
The other side of the wall is installed cooling water curtain, exhaust fan in the indoor stuffy air out of the outdoor, but also through the cooling water curtain into the indoor containing rich water vapor low temperature air inhalation room, so as to achieve ventilation, cooling effect.
2. Principle of ventilation
Exhaust fan to the process of exhaust air will cause indoor pressure drop, indoor air becomes thin, forming a negative pressure area, air due to pressure difference compensation into the room. In the practical application of industrial plants, exhaust fans are usually installed on one side of the plant, the air intake in the other side of the plant room, the air from the intake port to the exhaust fan to form convective blowing. During this process, the doors and Windows near the exhaust fan remain closed, forcing air to flow into the workshop compensated by the doors and Windows on the intake side. The air flows in line and orderly from the inlet into the workshop, through the workshop, and out of the workshop by the exhaust fan. Thorough and efficient air change, air change rate can be up to 99%. Through the specific engineering design, according to the need to design the air change speed and wind speed, any high heat, harmful gas, dust smoke can be quickly discharged from the workshop, any poor ventilation problems can be completely solved at once. The effect of ventilation can be achieved within a few seconds of turning on the fan.
3. Principle of cooling
Exhaust fans can quickly exhaust the stuffy indoor air, the other side of the outdoor air into the room, to reach the temperature and the outside temperature is flat, as for the workshop temperature rise. In the process of air flow, heat is taken away from the human body. Air flow accelerates the evaporation of sweat and absorbs heat from the human body, thus making the human body feel cool, as cool as the natural wind.
