Patent Application
20060119198
1. Field of the Invention
The invention relates to a shaftless magnetic trajectory fan, and in particular, to a shaftless magnetic trajectory fan with no noise, no friction, no heat generation and extended life.
2. Description of the Prior Art
The conventional fan is usually designed by using a bearing or oil seal to fix the central shaft thereof. Since the central shaft may rub against the bearing or oil seal upon rotation of the fan, the use of the bearing or oil seal will generate noise. In addition, after the central shaft is abraded by the bearing or oil seal, some crumbs resulted from the central shaft may be dispersed on an article requiring heat dissipation. This abrasion may also generate heat, and thus lead to dynamic energy loss of the rotating fan. Furthermore, in the case that the oil seal is employed to fix the central shaft, the gaseous oil may directly blow onto the article requiring heat dissipation.
In order to solve the above problems, a so-called magnetic fan shown in
Referring to
Accordingly, the conventional art mentioned above has still many disadvantages and is not designed perfectly such that it needs to be improved immediately.
In view of the various disadvantages associated with the prior art product, the inventor of this application had devoted to improve it and, after studying intensively for many years, accomplished successfully the present shaftless magnetic trajectory fan.
It is an object of the present invention to provide a shaftless magnetic trajectory fan without generating noise.
It is another object of the present invention to provide a shaftless magnetic trajectory fan having an extended service life.
It is a further object of the present invention to provide a shaftless magnetic trajectory fan having no dynamic energy loss due to the heat generated from abrasion.
It is a still object of the present invention to provide a shaftless magnetic trajectory fan having low impedance but high rotating speed.
The shaftless magnetic trajectory fan that can accomplish the above-described objects according to the invention includes a magnetic track, a controller and a magnetic fan. The magnetic track comprises two outwardly-opened U-shaped magnetic conducting rings coupled with each other, wherein each of the two U-shaped magnetic conducting rings has therein a ring-shaped magnet with different poles at the inner and outer edges, and the connection portion of the two U-shaped magnetic conducting rings has thereon another ring-shaped magnet with different poles at the inner and outer edges. The controller has thereon several electromagnets formed of coils. The magnetic fan includes a top cover with several blades on the outer edge and a magnetic-levitated main body, wherein the magnetic-levitated main body has therein a ring-shaped magnet with different poles at the inner and outer edges, the pole at the inner edge of the ring-shaped magnet of the magnetic-levitated main body is the same as that at the outer edge of the ring-shaped magnet of the magnetic track, the magnetic-levitated main body is upwardly coupled with a ring-shaped magnet corresponding to the electromagnets of the controller, and the top cover covers the outer edge of the magnetic-levitated main body.
The drawings disclose an illustrative embodiment of the present invention which serves to exemplify the various advantages and objects hereof, and are as follows:
Referring to
The magnetic track 1 comprises two outwardly-opened U-shaped magnetic conducting rings 11 coupled with each other, wherein each of the two U-shaped magnetic conducting rings 11 has therein a ring-shaped magnet 4 with different poles at the inner and outer edges, and the connection portion of the two U-shaped magnetic conducting rings 11 has thereon another ring-shaped magnet 4 with different poles at the inner and outer edges.
The controller 2 has thereon several electromagnets 21 formed of coils.
The magnetic fan 3 comprises a top cover 31 with several blades 311 on the outer edge and a magnetic-levitated main body 32, wherein the magnetic-levitated main body 32 has therein a ring-shaped magnet 4 with different poles at the inner and outer edges, the pole at the inner edge of the ring-shaped magnet 4 of the magnetic-levitated main body 32 is the same as that at the outer edge of the ring-shaped magnet 4 of the magnetic track 1, in addition, the inner edge of the ring-shaped magnet 4 provided in the magnetic-levitated main body 32 has several openings 41, the magnetic-levitated main body 32 is upwardly coupled with a ring-shaped magnet 4 corresponding to the electromagnets 21 of the controller 2, and the top cover 31 covers the outer edge of the magnetic-levitated main body 32.
Each of the two U-shaped magnetic conducting rings 11 and the magnetic-levitated main body 32 is made of a magnetic conducting material. The ring-shaped magnet 4 provided in the magnetic-levitated main body 32 is accommodated between the two ring-shaped magnets 4 of the magnetic track 1 via the openings 41 thereon such that the ring-shaped magnet 4 provided in the magnetic-levitated main body 32 faces to the ring-shaped magnet 4 at the connection portion of the two U-shaped magnetic conducting rings 11. The ring-shaped magnet 4 provided in the magnetic-levitated main body 32 is suspended between the two ring-shaped magnets 4 of the magnetic track 1 according to the principle “like magnetic poles repel each other” and suspended in the outer edge of the magnetic track 1 when interacted by the ring-shaped magnet 4 at the connection portion of the two U-shaped magnetic conducting rings 11. The ring-shaped magnet 4 with which the magnetic-levitated main body 32 is upwardly coupled drives rotation of the magnetic fan 3 when a circuit flows through the electromagnets 21 of the controller 2.
Referring to
Please refer to 3A. The upper pole and the lower pole of the ring-shaped magnet 4 covered by each of the two U-shaped magnetic conducting rings 11 may be different. For example, the poles at the upper edge and the bottom edge may be N-pole and S-pole, respectively. Whereas, the poles of the ring-shaped magnet 4 at the connection portion of the two U-shaped magnetic conducting rings 11 and the poles of the ring-shaped magnet 4 of the magnetic-levitated main body 32, which are covered, are opposite to the poles of the adjacent ring-shaped magnets 4 covered by the two U-shaped magnetic conducting rings 11. For example, for the ring-shaped magnet 4 at the connection portion of the two U-shaped magnetic conducting rings 11 and the ring-shaped magnet 4 of the magnetic-levitated main body 32, the poles at the upper edge and the bottom edge may be S-pole and N-pole, respectively.
The shaftless magnetic trajectory fan provided by the present invention, when comparing with other previous conventional technologies, has following advantages:
1. Since the shaftless magnetic trajectory fan provided by the present invention has no central shaft, the problem of generating noise occurred in the prior art is avoided.
2. Since the shaftless magnetic trajectory fan provided by the present invention is operated by magnetic levitation and no central shaft is provided, the conventional problems that a central shaft abrasion resulted from friction with the bearing or oil seal upon rotation and thus the fan rocks itself when re-started are avoided, thereby achieving the purpose of increasing the fan's service life.
3. Since the shaftless magnetic trajectory fan provided by the present invention is operated by magnetic levitation and no central shaft is provided, the problems that the dynamic energy loss due to the heat generated from friction of the central shaft with the bearing, the oil seal, the retaining hole or the base are avoided.
Many changes and modifications in the above described embodiment of the invention can, of course, be carried out without departing from the scope thereof. Accordingly, to promote the progress in science and the useful arts, the invention is disclosed and is intended to be limited only by the scope of the appended claims.
