Fan frame with improved heat dissipation performance and heat dissipation fan having the same

A fan frame with an improved heat dissipation performance includes a frame body, a plurality of stationary blades, and a central base. The frame body defines a flow channel, the central base is arranged within the flow channel and divides the flow channel into flowing zones. Each of the flowing zone includes a high-pressure zone and a low-pressure zone. The central base defines first slot, second slot and receiving groove between the first slot and the second slot, the first slot communicates the high-pressure zone and the receiving groove, the second slot communicates the low-pressure zone and the receiving groove.

FIELD

The subject matter herein generally relates to heat dissipation, and more particularly, to a fan frame with improved heat dissipation performance and a heat dissipation fan having the fan frame.

BACKGROUND

Electronic devices, such as servers, include electronic components and heat dissipation fans to dissipate heat generated by the electronic components. In use, the heat dissipation fan drives cool air in the ambient environment to replace hot air around the electronic components. However, the hot air may flow in irregular ways when passing through a fan frame of the heat dissipation fan, resulting in a poor heat dissipation performance.

DETAILED DESCRIPTION

Referring toFIGS.1and2, an embodiment of a fan frame100is provided. The fan frame100includes a hollow frame body10, a plurality of stationary blades20, and a central base30. The frame body10defines a flow channel11allowing a fluid to pass through. The flow channel11includes an inlet111and an outlet112opposite to the inlet111. The central base30is arranged within the flow channel11. The stationary blades20connects between the central base30and the frame body10. The stationary blades20is disposed obliquely with respect to a direction from the inlet111to the outlet112. In this embodiment, the fluid is air, in other embodiments, the fluid can be other heat dissipation medium such as water, ethanol, etc.

Referring toFIGS.1and2, each of the stationary blades20includes a windward surface21and a leeward surface22opposites to the windward surface21. The windward surface21faces the inlet111, and the leeward surface22y faces the outlet112. The stationary blades20divide the flow channel11into a plurality of flow zones A. Each flow zone A includes a first zone B and a second zone C, the first zone B is close to the windward surface21, and the second zone C is close to the leeward surface22.

Referring toFIGS.1and2, the central base30includes a bottom plate31, a first side plate32, and a second side plate33. The first side plate32connects to the second side plate33to form an annular wall34, and the annular wall34surrounds an edge of the bottom plates31to form a receiving groove35. The receiving groove35accommodates a driving motor202(referring toFIGS.3and4) that generates heat therein.

Referring toFIGS.1and2, the first side plate32defines a plurality of first slots321, and the second side plate33defines a plurality of second slots331. Each of the first slots321communicates with the first zone B and the receiving groove35for guiding air to flow from the first zone B to the receiving groove35. Each of the second slots331communicates with the second zone C and the receiving groove35for guiding air to flow from the receiving groove35to the second zone C.

Referring toFIGS.1and2, when air passes through the flow channel11, the stationary blades20compress the air to generates a high-pressure zone (not shown) near the windward surface21and a low-pressure zone (not shown) near the leeward surface22. The air in the high-pressure region is further introduced into the receiving groove35through the first slots321. Then, the air in the receiving groove35, which carries the heat generated by the driving motor202, is introduced into the low-pressure region through the second slots331. As such, the heat generated by the driving motor202is dissipated.

The fan frame100provided by the present application is provided with a plurality of first slots321on the first side plate32, and a plurality of second slots331is provided on the second side plate33, so that air flows into the receiving groove35through the first slot321and out of the receiving groove through the second slot331, thereby avoiding disorder of airflow and improving heat dissipation efficiency. Meanwhile, regulated airflow also helps to reduce noises.

Referring toFIGS.1and2, in this embodiment, the stationary blades20are arranged evenly around the annular wall34, and the stationary blades20are inclined with respect to a direction from the inlet111to the outlet112, so that the windward surface21faces the airflow, and the leeward surface22are opposite to airflow.

Referring toFIGS.1and2, in this embodiment, one of the first slots321or one of the second slots331is disposed between every two adjacent stationary blades20, and the number of the first slots321is the same as the number of the second slots331.

Referring toFIGS.1and2, in this embodiment, the windward surface21is partially exposed to the first slots321, so that air in the first zone B can enter the receiving space35without obstacles. The leeward surface22is spaced apart from the second slots331, thereby prolonging a flow path of air from the receiving groove35into the second zone C and improving the heat dissipation efficiency.

Referring toFIGS.1and2, in this embodiment, the first side plate32is provided with a third slot324that passing through the opposite sides of the first side plate32. The third slot324connects the first zone B and the receiving groove35. The third slot324further connects the first slot321to form a wiring slot325. Wires of the driving motor202can be disposed in the wiring slot325.

Referring toFIGS.1and2, in this embodiment, the fan frame100also includes a fixing ring40, which is sleeved outside the central base30. Each stationary blade20passes through the fixing ring40to connect the stationary blades20as a whole.

Referring toFIGS.1and2, in this embodiment, the fan frame100also includes a fixing seat50, which is arranged in the center of the bottom plate31. The fixing seat50is used to fix the driving motor202.

Referring toFIGS.1and2, in this embodiment, the frame body10defines a plurality of fixing holes12penetrating two opposite side of the frame body10. The fixing holes12is used for fixing the frame body10to a workpiece, such as a casing of desktop computer.

ReferringFIGS.2,3and4, the embodiment of this application provides a heat dissipation fan200. The heat dissipation fan200includes the fan frame100, a rotating disc201, the driving motor202, and a bearing203. The driving motor202is arranged within the receiving groove35. The rotating disc201connects to the driving motor202. The driving motor202is used to drive the rotating disc201to rotate, so that the rotating disc201drives air to go through the flow channel11.

ReferringFIGS.2,3and4, in this embodiment, the rotating disc201includes a disc body2011, a plurality of rotating blades2012, and a rotating shaft2013. The rotating blades2012are arranged outside the disc body2011. The rotating shaft2013is arranged on the center of the disc body2011and connected to the driving motor202through the bearing203.

ReferringFIGS.2,3and4, in this embodiment, the driving motor202includes a rotor2021, a stator2022, a circuit board2023, and a shaft sleeve2024. The rotor2021is arranged in the disc body2011, the stator2022and the circuit board2023are arranged in the receiving groove35. The rotor2021and the stator2022are connected through the shaft sleeve2024, the shaft sleeve2024is connected to the bottom plate31through the shaft sleeve fixing seat50, and the rotating shaft2013is arranged inside the shaft sleeve2024through the bearing203.