Fan blade structure and centrifugal fan

Abstract

The invention provides a fan blade structure and a centrifugal fan. The centrifugal fan comprises a casing with a first air inlet and an air outlet and the fan blade structure set in the casing. The fan blade structure comprises a hub and a plurality of blades disposed on the outer peripheral side of the hub, each blade has a first portion and a second portion, and the first portion and the secondportion form a vertically-extended imaginary straight line in the middle. The first portion has a surface area greater or less than a surface area of the second portion, and an outer space that is not perpendicular to a first air inlet surface where the first air inlet is located is formed between one side of the second portion of the plurality of blades and the inner side wall of the casing.

Description

technical field [0001] The invention relates to a fan blade structure and a centrifugal fan, in particular to a fan blade structure and a centrifugal fan which can improve the smoothness of the flow field and improve the overall efficiency of the centrifugal fan. Background technique [0002] With the rapid development of the current electronic industry, the performance of electronic components continues to improve. As the calculation speed increases, the heat generated by it will generate relatively large amounts of heat. If the heat cannot be dissipated immediately, the computing performance of the electronic components will decrease. In severe cases, it will cause burning, so centrifugal fans are used as heat dissipation in limited system space. [0003] see figure 1 , Figure 2A , Figure 2B , the existing centrifugal fan 1 mainly includes a frame body 11 and a fan blade 12, the upper part 111 and the lower part 112 of the frame body 11 respectively have an air inlet ...

AI Technical Summary

Problems solved by technology

[0004] The size of the centrifugal fan 1 in a general system (such as a notebook computer, smart notebook, vehicle system, All-in-One (AIO), mini system or IPAD) is mainly selected according to the shortest side of the system. It is very difficult to select the centrifugal fan 1 for irregular systems, and two situations often occur: the first situation is that when the fan size is selected to be large, it will interfere with the electronic components or components inside the system. Other devices, such as the height of the shortest side of the irregular system, can be suitable for selection such as a 3-inch centrifugal fan, but it cannot Choose a centrifugal fan with a more suitable size for use; the second situation is that the small size of the fan will result in insufficient performance (such as insufficient air volume to meet the heat dissipation requirements), so that it is equivalent to wasting the system that accommodates the aforementioned fan. Space, such as irregular systems are affected by the interference of internal electronic components or other devices, so that only a small 1-inch centrifugal fan can be used, but the air volume blown by the 1-inch centrifugal fan is not enough to quickly dissipate heat from the entire system. Poor overall thermal performance of the system

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