Eccentric fan for indoor cabinet air conditioner

Abstract

The invention relates to an eccentric fan of bank air condition indoor machine, wherein it comprises: blade wheels, worm frame with gas inlet chamber, wind channel; said blade wheels are mounted inside the chamber with 8-12 blades; the front gas inlet of gas inlet chamber; said blades have one rectify edge coiled towards to the blade wheel rotation direction at the edge near to the gas inlet of blade wheel; the part of blade near to the outer diameter of blade wheel is lightly bended to the rotation direction of blade wheel; and the part near to the inner diameter is lightly bended to the reversed rotation direction; the gas inlet has metal frame. The invention can restrain the generation of turbulent airflow at the surface of blade and the airflow separation to avoid gas reflux, increase the pressure at the gas outlet, improve the ventilate efficiency and reduce the noise.

Description

technical field [0001] The invention relates to a fan structure of an air conditioner indoor unit, in particular to a centrifugal fan structure of a cabinet type air conditioner indoor unit. Background technique [0002] The indoor unit of the cabinet air conditioner uses a centrifugal fan. The air supply system is mainly composed of impeller, air inlet chamber (equivalent to a collector), air duct and other components. The impeller of the centrifugal fan rotates at a high speed driven by the motor. Under the action of centrifugal force, the gas in the space between the outer diameter of the impeller and the air duct forms a positive pressure (that is, higher than the ambient atmospheric pressure), which is blown out from the radial direction through the air duct, and at the same time forms a negative pressure at the inner diameter of the impeller and the suction port. Pressure (lower than ambient atmospheric pressure), the external gas is absorbed into the impeller under th...

AI Technical Summary

Problems solved by technology

But so far, the noise reduction design of the indoor unit of the cabinet type air conditioner is generally an improved design of components such as the air intake grille, motor, box, evaporator and air outlet, such as the patent "Noise reduction system for air conditioners (96104619.8 ) set the air intake grilles on the front panel on both sides of the indoor unit, and arrange the suction and exhaust in two directions from the noise source, which makes the noise weakened; the patented "low noise centrifugal Type ventilation fan (92237199), "Passive noise reduction device for room air conditioner (93208380) and so on are additional noise reduction facilities, and "Noise reduction system for reducing ventilation airflow noise of air-conditioning indoor cabinets" (99123819.2) is added at the fan outlet Measures such as deflectors, improving the structure of evaporators and ventilation ducts can improve the ventilation performance of the air conditioner and reduce the noise of the indoor unit of the air conditioner, but there are few improvement measures for the fan itself

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