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Flow guiding ring structure, axial flow fan and air conditioner

A technology of axial flow fan and guide ring, applied in the field of noise reduction, can solve the problems of increasing leakage space, increasing the distance between the top of the fan blade and the guide ring, reducing the air volume of the fan and the efficiency of the fan, and achieving the goal of reducing noise Effect

Active Publication Date: 2017-01-11
GREE ELECTRIC APPLIANCES INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The inventors found that there are at least the following problems in the prior art: the above method has great limitations, and slotting will increase the distance between the top of the fan blade and the guide ring, thereby increasing the leakage space and reducing the air volume and air output of the fan. Fan efficiency

Method used

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  • Flow guiding ring structure, axial flow fan and air conditioner
  • Flow guiding ring structure, axial flow fan and air conditioner
  • Flow guiding ring structure, axial flow fan and air conditioner

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Embodiment Construction

[0030] Combine below Figure 1 ~ Figure 4 The technical solution provided by the present invention is described in more detail.

[0031] See figure 1 with figure 2 The embodiment of the present invention provides a flow guide ring structure, including a ring body 1, the ring body 1 includes a through hole 12 and a closed cavity 11, the smallest diameter of the ring body 1 is provided with an opening 13, the opening 13 cuts the cavity 11 communicates with the through hole 12. Wherein, the fluid in the through hole 12 can enter the cavity 11 through the opening 13.

[0032] The ring body 1 has a closed cavity 11, and an opening 13 is provided at the smallest diameter of the ring body 1 (that is, at the inner wall of the through hole 12 for air flow through the axial fan in the middle of the ring body 1). The cavity 11 is in communication. The opening 13 is a micropore, that is, its size is relatively small. The number of openings 13 may be one or more. When multiple openings 13 ...

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Abstract

The embodiment of the invention discloses a flow guiding ring structure, an axial flow fan and an air conditioner, relates to the denoising field and is used for lowering the pneumatic noise of the axial flow fan in the using process on the premise that the air outflow amount of the fan is guaranteed. The flow guiding ring structure comprises a ring body; the ring body comprises a closed cavity and a through hole; the minimum diameter position of the ring body is provided with open holes; the cavity is communicated with the through hole through the open holes; and fluid in the through hole can enter the cavity through the open holes. Due to the above technical scheme, on the premise that the Venturi tube effect of the flow guiding ring structure is guaranteed, the open structure is added on the surface, the turbulent energy of blade top airflow is transmitted out of a fan area in the radial direction, and therefore the denoising purpose is achieved.

Description

Technical field [0001] The invention relates to the field of noise reduction, in particular to a flow guide ring structure, an axial fan and an air conditioner. Background technique [0002] The aerodynamic noise of the axial flow fan used in the air conditioner is the noise source second only to the vibration noise of the compressor, so fan noise reduction is one of the key research topics in fan optimization. The aerodynamic noise of the axial flow fan mainly comes from the vicinity of the blade, especially the tip area. Since this area has the strongest work force and the highest wind speed, and the tip leakage vortex mainly occurs in this area, the airflow vortex is serious, which is the biggest source of aerodynamic noise. [0003] In the prior art, the following methods are used to reduce the noise of the fan: a number of concave circumferential groove structures are added at the minimum diameter of the guide ring of the axial flow fan to increase the gap between the guide r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/54F04D29/66
CPCF04D29/541F04D29/661F04D29/665
Inventor 朱芳勇熊军高旭廖俊杰
Owner GREE ELECTRIC APPLIANCES INC
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