BACKGROUND OF THE INVENTION

The present invention relates to a heat dissipation apparatus, and more particular, to a heat dissipation apparatus including two sets of fans installed within a single enclosure. Therefore, an enhanced dissipation effect is resulted because the speed and pressure generated by rotation of the fan can be adjusted according to specific requirement, while the assembly convenience is improved.

To enhance overall wind speed and pressure, two heat dissipation fans 2A and 2Aâ€² are typically combined or stacked in series as shown in FIG. 1. Thereby, the damage of the system caused interruption of any of the fans can be avoided. However, to assemble the fans 2A and 2Aâ€² together, fasteners such as screws have to be applied to the frames of the fans 2A and 2Aâ€².

When the fans 2A and 2Aâ€² are secured to each other in series, increase in wind pressure is not significant because the frames of the fans 2A and 2Aâ€² normally include ribs 21A for reinforcing stability of the attachment. When the first fan 2A rotates to generate an air flow, the air flow is easily interrupted by the ribs 21A to cause turbulence. When the turbulence is circulating into the fan 2Aâ€², the wind speed and pressure generated by the fan 2Aâ€² is seriously affected. Even when the fan 2Aâ€² remains stationary when the fan 2A rotates, the wind pressure will be lowered by the installation of the fan 2Aâ€². The serial connection of the fans 2A and 2Aâ€² results in significant resistance, which degrades rotation efficiency and increases the noise.

BRIEF SUMMARY OF THE INVENTION

The present invention provides a heat dissipation apparatus which integrates two sets of fans into a single enclosure, such that assembly convenience is greatly improved, while the heat dissipation efficiency is enhanced.

The heat dissipation apparatus provided by the present invention is operative to adjust the wind speed and pressure of the air flow generated by the sets of fans.

The heat dissipation apparatus comprises an enclosure in which a fan seat is laterally disposed. The fan seat divides an interior space of the enclosure into two chambers. The heat dissipation apparatus further comprises a shaft extending through a center of the fan seat across both the chambers. In each of the chambers, a set of fan is installed about the shaft. Each set of fans includes a coil set, a magnetic device and a set of blades.

The fan seat includes at least one stationary guiding blade to guide the air flow from one set of fan into the other. Therefore, the turbulence caused by the air flow generated by the other set of fan is prevented. The wind speed and pressure can thus be adjusted as required.

These and other objectives of the present invention will become obvious to those of ordinary skill in the art after reading the following detailed description of preferred embodiments.

It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the invention as claimed

BRIEF DESCRIPTION OF THE DRAWINGS

These, as well as other features of the present invention, will become apparent upon reference to the drawings wherein:

FIG. 1 shows a perspective view of a conventional fan assembly;

FIG. 2 shows an exploded view of a heat dissipation apparatus provided by the present invention;

FIG. 3 shows a perspective view of the heat dissipation apparatus; and

FIG. 4 shows a cross sectional view of the heat dissipation apparatus.

DETAILED DESCRIPTION OF THE INVENTION

Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts.

The present invention provides a heat dissipation apparatus 10 as shown in FIG. 2. The heat dissipation apparatus 10 includes an enclosure or housing 1, in which a lateral fan seat 12 (as shown in FIG. 4) is integrally formed. The fan seat 12 divides an interior space of the enclosure 10 into an upper chamber 13 and a lower chamber 14 to accommodate two sets of fans 2 and 2â€² therein, respectively. As shown, the fan seat 12 includes a substantially circular dish and at least one guiding blades 121 (stationary blade) extending radially from a is periphery of the body dish. The heat dissipation apparatus 10 further comprises a shaft 15 extending through a center of the fan seat 12 into both the upper chamber 13 and the lower chamber 14.

The upper and lower chambers 13 and 14 comprise fans 21 and 21â€² in mechanical communication with the shaft 15, respectively. The fans 21 and 21â€² comprise hubs 211 and 211â€² about the shaft 15, hollow bushings 212 and 212â€² between the shaft 15 and the hubs 211 and 211â€², respectively, blades extending radially from an external periphery of the hubs 211 and 211â€². The fans 21 and 21â€² are mounted to the shaft 15 by means of ball bearings 22 and 22â€², C-rings 23 and 23â€², and springs 24 and 24â€². Each of fan sets 2 and 2â€² further comprises a coil set 25, 25â€², respectively, and magnetic strips 26, 26â€² and magnetic frames 27, 27â€² between the hubs 21, 21â€² and the coil sets 25, 25â€².

Referring to FIGS. 2 and 4, during assembly, the coil sets 25, 25â€², magnetic strips 26, 26â€² and magnetic frames 27, 27â€² are installed in the hubs 211 and 211â€² of the fans 21, 21 â€², respectively. The bushings 212 and 212â€² are then inserted through the hubs 21 and 21â€², respectively. The fans 2 and 2â€² are then mounted to two sides of the fan seat 12, and the while fan assembly is then disposed in the enclosure 1. To secure the fans 2 and 2â€² to two sides of the fan seat 12, the through holes of the bushings 212 and 212â€² are aligned with the shaft 15 at two sides of the fan seat 12. Once the shaft 15 is inserted into the hubs 212 and 212â€², the C-rings 23 and 23â€² and the springs 24 and 24â€² are engaged with the shaft 15. Thereby, a heat dissipation apparatus with two fan sets 2 and 2â€² is obtained as shown in FIG. 3.

In the present invention, the integrally fan laterally disposed in the enclosure divides the interior space of the enclosure into two chambers, such that two fan sets can be installed in a single enclosure. The guiding blades 121 extending from the central circular dish of the fan seat guides the air flow generated by one of the fan sets 2 and 2â€² into the other without causing turbulence. Therefore, the wind speed and pressure of the air flow can be adjusted as required.

This disclosure provides exemplary embodiments of the present invention. The scope of this disclosure is not limited by these exemplary embodiments. Numerous variations, whether explicitly provided for by the specification or implied by the specification, such as variations in shape, structure, dimension, type of material or manufacturing process may be implemented by one of skill in the art in view of this disclosure.