The present invention relates generally to a fan flow guide structure, and more particularly to a fan flow guide structure applicable to a centrifugal fan.
There is a trend toward designing electronic device or handheld device such as mobile phone or tablet with thinner and more advanced type. As a result, more electronic components are received in a narrower internal space of the device to generate more heat. In order to more effectively dissipate the heat in the handheld device, a centrifugal fan is disposed in the handheld device. As shown in
It is therefore tried by the applicant to provide a fan flow guide structure to solve the problem existing in the conventional centrifugal fan.
It is therefore a primary object of the present invention to provide a fan flow guide structure, which can enhance the fan flow amount in the same fan capacity.
It is a further object of the present invention to provide a fan flow guide structure, which can take external air into the wind supplementing section of the fan according to the direction of the airflow in the fan.
To achieve the above and other objects, the fan flow guide structure of the present invention includes a centrifugal fan impeller and a case. The case includes an upper cover and a base seat connected with the upper cover. A peripheral wall is formed between the upper cover and the base seat. A lateral wind outlet is formed on the periphery wall. A fan impeller space and a flow passage are defined between the upper cover and the base seat and the peripheral wall. The fan impeller space serves to receive the centrifugal fan impeller. The flow passage is in communication with the fan impeller space and the lateral wind outlet. A tongue section is disposed in the flow passage in adjacency to the lateral wind outlet. A wind supplementing section is defined opposite to the tongue section in adjacency to the lateral wind outlet. An upper intake gill section is disposed on the upper cover corresponding to the wind supplementing section in communication with the wind supplementing section.
In the above fan flow guide structure, the upper intake gill section includes at least one first guide vane and at least one first flow guide hole. The first guide vane obliquely extends from the upper cover to the wind supplementing section. The first guide vane has a first free end directed to the lateral wind outlet. The at least one first flow guide hole is formed on an upper surface of the first guide vane and directed to the lateral wind outlet. The first flow guide hole obliquely passes through the upper cover in communication with the wind supplementing section.
In the above fan flow guide structure, a lower intake gill section is disposed on the base seat corresponding to the wind supplementing section. The lower intake gill section is in communication with the wind supplementing section.
In the above fan flow guide structure, the lower intake gill section includes at least one second guide vane and at least one second flow guide hole. The second guide vane obliquely extends from the base seat to the wind supplementing section. The second guide vane has a second free end directed to the lateral wind outlet. The at least one second flow guide hole is formed on an upper surface of the second guide vanes and directed to the lateral wind outlet. The second flow guide hole obliquely passes through the base seat in communication with the wind supplementing section.
In the above fan flow guide structure, the lower intake gill section is opposite to the upper intake gill section of the upper cover.
In the above fan flow guide structure, the upper cover has an upper wind inlet and the base seat has a lower wind inlet. The upper wind inlet and the lower wind inlet are in communication with the fan impeller space.
In the above fan flow guide structure, the case has a lateral wind inlet in communication with the fan impeller space.
In the above fan flow guide structure, the tongue section protrudes from the peripheral wall.
In the above fan flow guide structure, the wind supplementing section is a low-pressure and high-flow-speed section.
The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein:
The present invention provides a fan flow guide structure applicable to a centrifugal fan. Please refer to
A fan impeller space 24 and a flow passage 25 are defined between the upper cover 21 and the base seat 23 and the peripheral wall 23. The fan impeller space 24 serves to receive the centrifugal fan impeller 10. As shown in the drawings, the centrifugal fan impeller 10 is, but not limited to, substantially positioned at the center of the case 20. In a modified embodiment, the centrifugal fan impeller 10 is positioned in a position deviated from the center of the case 20. The upper cover 21 is formed with an upper wind inlet 211. The base seat 22 is formed with a lower wind inlet 221. The upper wind inlet 211 and the lower wind inlet 221 are in communication with the fan impeller space 24.
The flow passage 25 is in communication with the fan impeller space 24 and the lateral wind outlet 26. In addition, a tongue section 27 is disposed in the flow passage 25 in adjacency (connection) to the lateral wind outlet 26. A wind supplementing section 28 is defined opposite to the tongue section 27 in adjacency (connection) to the lateral wind outlet 26. As shown in the drawings, the tongue section 27 and the wind supplementing section 28 are respectively positioned on left and right sides of the lateral wind outlet 26 in adjacency to the lateral wind outlet 26. The tongue section 27 protrudes from the peripheral wall 23. The wind supplementing section 28 is a low-pressure and high-flow-speed section.
Moreover, in this embodiment, an upper intake gill section 212 is disposed on the upper cover 21 corresponding to the wind supplementing section 28. A lower intake gill section 222 is disposed on the base seat 22 corresponding to the wind supplementing section 28 opposite to the upper intake gill section 212. The upper and lower intake gill sections 212, 222 are, but not limited to, in communication with the wind supplementing section 28. In a modified embodiment, only the upper cover 21 is formed with the upper intake gill section 212 or only the base seat 22 is formed with the lower intake gill section 222. Alternatively, a lateral intake gill section (not shown) is disposed on the peripheral wall in the wind supplementing section 28.
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According to the arrangement of the present invention, the fan flow guide structure of the present invention can enhance the fan flow amount in the same fan capacity.
The present invention has been described with the above embodiments thereof and it is understood that many changes and modifications in such as the form or layout pattern or practicing step of the above embodiments can be carried out without departing from the scope and the spirit of the invention that is intended to be limited only by the appended claims.
Number | Name | Date | Kind |
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8684661 | Horng | Apr 2014 | B2 |
9518584 | Chen | Dec 2016 | B2 |
9568019 | Lu | Feb 2017 | B2 |
20060024160 | Horng et al. | Feb 2006 | A1 |
Number | Date | Country |
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201381995 | Jan 2010 | CN |
103727066 | Apr 2014 | CN |
203770218 | Aug 2014 | CN |
214036268 | Aug 2021 | CN |
10-2008-0010012 | Jan 2008 | KR |
201014980 | Apr 2010 | TW |
M611207 | May 2021 | TW |
Entry |
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Search Report dated Jun. 1, 2020 issued by Taiwan Intellectual Property Office for counterpart application No. 109141395. |
Search Report dated Apr. 27, 2022 issued by China National Intellectual Property Administration for counterpart application No. 109141395. |
Number | Date | Country | |
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20220213902 A1 | Jul 2022 | US |