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Application of axial flow fan in refrigeration and air conditioning industry

Update:10-08-2019
Summary:

The axial flow fan for refrigeration and air conditioni […]

The axial flow fan for refrigeration and air conditioning (hereinafter referred to as "axial flow fan") mainly refers to the axial flow fan used in the mandatory heat exchange of various air conditioning units, and does not include ventilation for ventilation, heating and cooling. An axial flow fan specially designed for textile air conditioners, and an axial flow fan for cooling towers. Axial flow fans are commonly used in various types of air-cooled heat pump units, air-cooled unit air conditioners, and multi-connected air conditioners. According to the design parameters of the air cooler, a low static pressure free axial fan or a relatively high static axial fan can be selected. For specific applications, most air-cooled large and medium-sized central air-conditioning forced heat exchanges use single-stage axial fans with relatively high static pressure, while air-cooled household central air conditioners and household air conditioners have more external engines. Cooling with a low static pressure free axial fan. Axial fans are mostly installed in vertical installation, while free-flow axial fans are mostly horizontal.

At present, most air-conditioner manufacturers are equipped with fans based on empirical data on the resistance of the air cooler and the amount of heat exchange required. Because the fan also needs to overcome the resistance of other parts of the system except the resistance of the air cooler, such as the ribs of some air conditioner unit casings, the connecting pipes and valve parts of the compressor and the air cooler, and the lodging of the fins of the air cooler It also causes a change in local resistance. Therefore, it is often the case that some axial fans that are matched by the unit operate under low air volume, high resistance, and high power conditions, resulting in a low energy efficiency ratio of the whole machine, and an easily overloaded and burned motor of the fan. How to scientifically and reasonably match the axial flow fan requires more technical exchanges between the fan manufacturer and its users.

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