Fan guard

Abstract

A fan guard which reduces fluid noise while holding the conventional function for blocking intrusion of a hand of a person or a foreign matter. In a fan guard (200) constituted of a plurality of crosspieces (110) and arranged at an outlet (6) of an engine driven heat pump (1) having a fan (5), the crosspieces (110) are formed by continuing unit shapes (110a) bending or curving relative to the reference line (S) for constituting the crosspieces (110) on the fan guard (200). The unit shape (110a) is formed to have a wavy shape, for example.

Description

fan guard technical field The present invention relates to fan guards. Background technique Conventionally, an air blower installed in an outdoor unit of an air conditioner or the like is known. A fan guard is provided at the suction part or the blowing part of the blower fan of this blower device in order to prevent the intrusion of human hands and foreign objects. Since high ventilation and quietness are required for the fan guard, it is constructed by combining beam members. The fluid noise of the air supply device is divided into fan noise and shroud noise. Fan sound refers to the noise generated by the rotation of the fan. Shroud noise, on the other hand, refers to the rubbing wind noise of wind passing through the fan shroud. The magnitude of the shroud sound is proportional to the magnitude of the pressure fluctuation on the surface of the beam member and the relative length of the vortex generated from the beam member. The pressure fluctuation refers to the f...

AI Technical Summary

Problems solved by technology

On the other hand, the outdoor unit of the air conditioner has a smaller heat exchanger due to its space-saving design

In this way, since the outdoor unit needs to increase the air volume in order to produce the same heat exchange capacity, the generated fluid noise will inevitably increase.

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