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Cross-flow fan blade, cross-flow fan, indoor unit and air conditioner

A cross-flow vane and blade internal technology, which is applied in the field of cross-flow vanes, indoor units and air conditioners, and cross-flow vane blades, can solve the problems of indoor unit performance impact and separation loss, etc., to reduce air separation, Reduce the air separation loss and reduce the effect of axial movement

Pending Publication Date: 2018-06-01
GREE ELECTRIC APPLIANCES INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The blade surfaces of the existing cross-flow fan blades are designed with smooth transition lines. According to the aerodynamic analysis, when the cross-flow fan blades work, there is a serious separation at the back of the blades in the inlet area, especially the blades behind the position of the maximum blade thickness. Gate channel separation is more pronounced (see image 3 As shown), the blade separation wake has a great impact on the performance of the indoor unit, especially when the fan blade rotates, it is easy to cause the airflow separation phenomenon on the back of the blade to be obvious, and the separation loss is relatively large

Method used

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  • Cross-flow fan blade, cross-flow fan, indoor unit and air conditioner
  • Cross-flow fan blade, cross-flow fan, indoor unit and air conditioner
  • Cross-flow fan blade, cross-flow fan, indoor unit and air conditioner

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Embodiment Construction

[0033] see in conjunction Figures 4 to 11 As shown, according to the embodiment of the present invention, the cross-flow fan blade includes a blade body 1 , the blade body 1 includes a blade back 2 , and a straightening protrusion 3 protruding from the blade back 2 is provided on the blade back 2 .

[0034] Since the rectification protrusion 3 protruding from the blade back 2 is set on the blade back 2 of the blade body 1, it can rectify the air flow passing through the blade back 2, thereby stabilizing the air flow when the blade rotates. The function makes the imported radial airflow flow along the surface of the blade back 2, reduces the axial movement of the airflow, achieves the rectification effect, reduces the airflow separation phenomenon on the back of the blade when the fan blade rotates, reduces the airflow separation loss, and accelerates the blade cascade. The effective internal flow improves the air volume of the indoor unit.

[0035] Preferably, along the dire...

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Abstract

The invention provides a cross-flow fan blade, a cross-flow fan, an indoor unit and an air conditioner. The cross-flow fan blade comprises a blade body (1); the blade body (1) comprises a blade back (2); and the blade back (2) is provided with a rectification projection (3) projected on the blade back (2). The cross-flow fan blade can reduce the airflow separation phenomenon at the back part of the blade when the fan is rotated, and reduces the airflow separation loss.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and in particular relates to a cross-flow fan blade, a cross-flow fan blade, an indoor unit and an air conditioner. Background technique [0002] The indoor unit of an air conditioner mainly includes evaporators, cross-flow fan blades, motors, volutes, volute tongues and other main components. The gap between the cross-flow fan blades and the volute tongue (referred to as the volute tongue gap) is a very sensitive one Parameters, the volute tongue clearance in the same air conditioner is generally a fixed value. [0003] Cross-flow fan blades are widely used in household air conditioners due to their low noise and stable wind output. Such as figure 1 and figure 2 As shown, the cross-flow fan blade is welded one by one by a plurality of middle-section fan blades 1', and the middle-section fan blade 1' includes a disc 2' and a plurality of non-equidistantly distributed blades 3', and e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/30F04D29/28F04D29/66F24F1/00F24F13/24
CPCF04D29/282F04D29/30F04D29/663F04D29/666F24F1/0025F24F13/24F24F2013/247
Inventor 黄美玲刘中杰邹建煌曹雷张苏北
Owner GREE ELECTRIC APPLIANCES INC
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