Fan guide device and centrifugal fan
A technology of diversion device and centrifugal fan, which is applied to components of pumping devices for elastic fluids, machines/engines, mechanical equipment, etc., which can solve the problems of large airflow resistance loss and reduce airflow resistance loss and power Reduce and reduce the effect of resistance loss
Active Publication Date: 2018-11-02
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
[0003] In view of this, the object of the present invention is to provide a fan guide device and a centrifugal fan to solve the technical problems in the prior art such as the large loss of air flow backflow resistance at the air inlet of the centrifugal fan.
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[0020] Various embodiments of the invention will be described in more detail below with reference to the accompanying drawings. In the various drawings, the same elements are denoted by the same or similar reference numerals. For the sake of clarity, various parts in the drawings have not been drawn to scale.
[0021] The fan guide device provided by the present invention is mainly used at the air inlet of the centrifugal fan to guide the air flow, and the noise and power consumption of the fan are reduced by setting the sound-absorbing structure on the guide device. The following is combined with specific embodiments The specific structure of the fan guide device of the present invention is introduced in detail.
[0022] Such as figure 1 As shown, the fan guide device 1 provided by the present invention includes a guide part 11 and a loss reduction part 12. The guide part 11 is a cylindrical structure, including a first end for air intake and a second end for air outlet. F...
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The invention relates to a fan flow guide device which comprises a flow guide part and a loss reduction part, wherein the flow guide part is in a cylindrical structure, and comprises a first end for air intake and a second end for air exhaust, and the loss reduction part is arranged on the outer side wall close to the second end of the flow guide part. According to the fan flow guide device, an airflow resistance loss reduction structure is adopted on the surface of the outer side of the fan flow guide device, so that the resistance loss caused by a flow boundary layer flowing back from the outer side of the flow guide device is reduced, the noise caused by energy dissipation is reduced, a flow velocity chaos state of a return flow is improved, and the noise reduction purpose is reached accordingly. In addition, the power consumption level of a centrifugal fan system can be reduced, the noise can be reduced by 1-2dB, and the power can be reduced by around 8%.
Description
technical field [0001] The invention relates to the technical field related to fans, in particular to a fan guide device and a centrifugal fan. Background technique [0002] The deflector is an important auxiliary part of the fan, which establishes a uniform velocity field and pressure field before the inlet of the fan to reduce flow loss and improve fan efficiency. The structure of the guide device will affect the performance of the fan. A well-designed guide device has less flow loss, while an unreasonable design will deteriorate the inlet conditions and lead to a decrease in fan performance. The noise of the gas centrifugal fan is also getting more and more attention. The existing centrifugal fan blades are generally used together with the flow guide device. Due to the difference between the movement and the static (the fan blade rotates, the flow guide device is stationary), there must be a certain gap between the two , this gap will not only cause leakage, but also mak...
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IPC IPC(8): F04D29/44F04D29/66
CPCF04D29/441F04D29/667
Inventor 刘洋曹雷张苏北刘中杰邹建煌
Owner GREE ELECTRIC APPLIANCES INC