Fan guard

A guard and fan technology, applied in the field of fan guards, can solve the problems of increasing air volume, increasing fluid noise, and reducing heat exchangers, etc., to achieve the effect of reducing pressure fluctuations and reducing fluid noise

Inactive Publication Date: 2014-04-02
YANMAR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0040] Such as image 3 As shown, the beam member 110 is formed by continuous unit shapes 110a having a wave shape with respect to the reference line S. In addition, the length of the unit shape 110a is at least smaller than the gap between the beam members 110 when the fan guard 200 is formed. In addition, the curvature rate of each part of the unit shape 110a is not specifically limited. In addition, in this embodiment, the arrangement of the cross member 110 with respect to the flow direction is not limited.

Embodiment approach 2

[0042] Such as Figure 4 As shown, the beam member 120 is formed by continuous unit shapes 120a having a triangular shape with respect to the reference line S. The unit shape 120a is composed of two sides of a triangle including a part of the reference line S, and two sides other than the reference line S. In addition, the length of the unit shape 120a is at least smaller than the gap between the beam members 120 when the fan guard 200 is formed. In addition, the bending angle of each part of the unit shape 120a is not particularly limited. In addition, in this embodiment, the arrangement of the cross member 120 with respect to the flow direction is not limited.

Embodiment approach 3

[0044] Such as Figure 5 As shown, the beam member 130 is formed by continuous unit shapes 130a having a square shape with respect to the reference line S. The unit shape 130a is composed of three sides of a quadrangle including a part of the reference line S, and is composed of three sides other than the reference line S. In addition, the length of the unit shape 130a is at least smaller than the gap between the beam members 130 when the fan guard 200 is formed. In addition, the length ratio of each side of the quadrangle of the unit shape 130a is not particularly limited. In addition, in this embodiment, the arrangement of the cross member 130 with respect to the flow direction is not limited.

[0045] use Image 6 And 7, the effect of the beam member 110 is explained. Image 6 In (a), the flow direction F (the hollow arrow in the figure, the same below) is the direction from left to right on the paper, perpendicular to the reference line S. First, by bending the unit shape 1...

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PUM

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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

Technical field [0001] The invention relates to a fan guard. Background technique [0002] Conventionally, an air blowing device installed in an outdoor unit of an air conditioner or the like has been known. In order to prevent the intrusion of human hands and foreign objects, a fan guard is provided at the suction part or the blowout part of the blower fan of the blower. Since the fan guard requires high air permeability and quietness, it is constructed by combining beam members. [0003] The fluid noise of the air supply device is divided into fan noise and shield noise. Fan sound refers to the noise generated by the rotation of the fan. On the other hand, the shroud sound refers to the frictional wind noise when the wind passes through the fan shroud. The magnitude of the shield 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 re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F5/00F24F1/40F24F1/56
CPCF24F13/082F24F13/24F04D29/705F04D29/703F24F1/56
Inventor 杉本和马斋藤昌弘中川修一村山昌章
Owner YANMAR CO LTD
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