Frame device of a fan

A frame device of a fan comprises a lower frame and a plurality of jut units. The lower frame is hollow. The jut units are disposed on the lower frame in a way of spacing apart from each other and extend upward and slant outward to constitute an entrance such that a plurality of elongated passages are formed for fluid flow. A fan wheel with a plurality of fan blades is associated with the lower frame. When the fan wheel rotates, more fluid can flow in the fan to enhance heat dissipation efficiency and reduce noise.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention is related to a fan frame device, particularly to a fan frame device of a cooling fan.

2. Brief Description of Related Art

Due to electronic products progressing rapidly, the running speeds of various electronic components in the electronic products are getting faster and data access rates thereof are getting increasing so that more heat is generated and it results in high temperature being kept in the electronic components. The computer is a typical one of the electronic products.

Originally, the main unit of a computer was designed without heat dissipation device except the cooling device attached to the power supplier helping to perform heat dissipation of the main unit. The heat dissipation has become an important factor for keeping running steadily in the recent year. Currently, the most popular heat dissipation device is fan and radiator, which carry out the heat dissipation job by way of convection and conduction.

The preceding radiator usually is made of aluminum alloy or copper and conductivity is a criterion to determine a good or bad radiator. Further, amount of the area contacting with flowing air is an essential factor influencing effect of heat dissipation. Hence, the more the surface area of the radiator contacts with the air, the better the effect of heat dissipation can be obtained.

The preceding fan provides a function of forcing cooling air passing over the surface of the radiator so that the faster the rotational speed of the fan is, the better the effect of heat dissipation is.

Therefore, computer components capable of generating a great deal of heat are designed with a function of heat dissipation. It requires the radiator only in case of the computer components generating less heat and it required the radiator associated with the fan in case of the computer components generating more heat. For instance, the chip module usually is attached with a radiator and the central processing unit (CPU) and graphic processing unit (GPU) on 3D accelerating card are attached with a radiator associated with a fan respectively.

In order to guarantee the CPU and the GPU operating safely and reliably, the method popularly used is to increase effective discharge power of the fan and the rotational speed of the fan respectively.

Further, referring toFIGS. 1 to 3, a conventional fan comprises a fan frame11and a fan wheel12. The fan frame11provides a hollow case with a frame wall111and a flow passage115is defined with an inlet112and an outlet113being disposed at two lateral sides of the fan frame11. A hub seat114is disposed in the flow passage115and the fan wheel12comprises a hub121and a plurality of fan blades122extending outward from the hub121in a radial direction. Then, the fan wheel12is movably attached to the hub seat114. When the fan wheel12rotates, the fan blades122drags fluid to flow into the flow passage115via the inlet112from the fan frame11and flow out via the outlet113.

However, a problem of the conventional fan in practice is in that the area of the inlet112available for the incoming fluid has been defined by the frame wall111so that only limited amount of fluid can be dragged by the fan and the radial pressure of fluid impacts the frame wall111to produce noise during the fluid moving into the flow passage115.

SUMMARY OF THE INVENTION

A primary object of the present invention is to provide a fan frame device, in which a lower frame is surrounded with jut units spacing apart from each other to increase intake amount of the fluid and protect the fan blades of the fan wheel from hitting foreign objects.

Another object of the present invention is to provide a fan frame device with which noise resulting from flowing fluid can be reduced effectively.

A further object of the present invention is to provide a fan frame device, in which a lower frame is surrounded with jut units spacing apart from each other and extends upward and slant outward, so that it allows the fan blades of the fan wheel being increased the size thereof.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring toFIGS.4 and 5, a frame device of a fan in the first embodiment according to the present invention comprises a lower frame21and a fan wheel22. The lower frame21is hollow with a support211connecting with the hub seat212and a plurality of jut units213extending from four sides of the frame21. It can be seen in the figures that the jut units213at the four sides of the frame21provides a rectangular shapes with a circular top respectively. Further, four corners of the frame21has a triangular shape respectively and the jut units213disposed at the four corners basically provide an inverted trapezoidal shape with a circular top respectively. A plurality of elongated spaces215are formed between the jut units213and Further, the jut units213extend upward and slant with facial sides thereof inclining outward to form a room214for accommodating the fan wheel22such that air can be induced by the fan wheel22via upper side of the fan wheel22and the elongated spaces215.

The fan wheel22comprises a hub221and a plurality of fan blades222extending outward from the hub221. The fan wheel22is movably attached to the hub seat212such that the jut units213can increase intake air of the fluid.

Referring toFIGS. 6 and 7, when the fan blades222of the fan wheel22rotate, a variable flow field generated to drag the fluid flowing into the entrance214and flowing out via the lower frame21. Further, the fluid can move in via the elongated spaces215between the jut units213to increase the amount of the fluid dragged by the fan blades222and that of fluid flowing out of the lower support so that heat dissipation can be performed more efficiently.

Further, an upper area surrounding by the jut units213is greater than a lower area surrounding by the jut units213due to the jut units213extending upward and slanting outward such that the fan blades222can be increased the radial area thereof and greater amount of fluid can be dragged to enhance heat dissipation efficiency.

In addition, the provision of the jut units213overcomes problems occurring in the conventional fan such as the fluid impacting the frame wall and generating noise and foreign objects being hit by the fan blades.

Referring toFIGS. 8 to 11, the second preferred embodiment is illustrated. The structure of the fan in the second embodiment is similar to the first embodiment and no further detail will be described for the parts same the first embodiment. The difference of the second embodiment from the first embodiment is in that the lower frame31provides a plurality of rectangular jut units313being disposed to space apart from each other. The provision of the jut units313can enhance the efficiency of heat dissipation, reduce noise and allow the fan blades extending the radial area thereof respectively.

While the invention has been described with referencing to preferred embodiments thereof, it is to be understood that modifications or variations may be easily made without departing from the spirit of this invention, which is defined by the appended claims.