Diffusive cooling device

A diffusive cooling device includes a plate body, on which a cavity recessed outwardly is formed and an opening is arranged; a web plate jointed at the upper side of the plate body correspondingly; a plurality of passing openings arranged on the web plate to act as air passages; a scroll fan arranged between the plate body and the web plate in corresponding to the opening; a shell body connected to the bottom of the plate body and jointed to the web plate correspondingly to enclose and prop up the plate body therein; and, an air inlet arranged at the front side of the shell body, through which an ambient air is flowed into the shell body by the extracting and thrusting forces of the fan. During operation, airflow is generated along the cavity and extended to corresponding area of web plate to diffusively pass through the plural passing openings to achieve a cooling objective.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention generally relates to a cooling device, in particular, to a cooling device attached to a bottom of an electronic device.

2. Description of Prior Art

Cooling performance always plays a key role in influencing the development of current electronic technology. Following the progress of technology and material, current electronic devices not only have more and more enhanced functions inherently, but also generate higher and higher heat dissipation during operation, the later eventually influencing the normally working temperature of the electronic device and thus reducing its lifespan, so appropriate cooling device has become an indispensable component in current electronic device's designing field.

Nowadays, a cooling mechanism is always designed correspondingly in most electronic components disposed inside electronic products seen in current market for operating a cooling function to keep each electronic component working under normal temperature. However, the designing trend of current electronic product is toward minimization, for example, notebook computer, which can not have a large volume of shell body as that of a common desktop computer to simultaneously accommodate multiple sets of heat dissipating accessories, so that most minimized electronic devices (e.g., notebook computer) have to install additional cooling devices to fulfill respectively required cooling demand.

According to an initial design of prior art, a cooling plate is attached to a bottom of a notebook computer to act as an auxiliary cooling device. The cooling plate, constructed of materials characterized with high heat conductivity, is directly and tightly attached to the bottom of the notebook computer in a way, such that the cooling plate may absorb the heat generated from the notebook computer via its high heat conductivity. Then, the absorbed heat is spread across the cooling plate and dissipated to the ambience via a heat exchanging operation, thus an auxiliary heat dissipating effectiveness being able to achieve. However, since the cooling efficiency of the heat conducting operation can not keep up with the heat generated from the interior of the notebook computer, the cooling performance of the prior cooling plate is unsatisfactory to both manufacturer and customer.

Accordingly, in order to solve the insufficiently heat dissipating problem of the prior structure, a fan is thereby arranged at the bottom of the cooling plate to generate a forced airflow aiming to a location, where heat is most easily generated from the notebook computer. However, according to this fixed position designing mode, the fan is usually arranged at one single position on the cooling plate, where the fan airflow can only perform a heat dissipating operation in terms of a forced air cooling mechanism to only one single position, so that impossibility of performing a heat dissipating operation in terms of a forced air cooling mechanism to the entire area of the bottom part of a notebook computer becomes a defect to such kind of cooling device, otherwise it will be perfect.

SUMMARY OF THE INVENTION

The invention is to provide a diffusive cooling device capable of diffusively applying a forced airflow, which is generated from a single scroll fan through the application of a plate body arranged with a cavity structure, making the airflow's cooling operation extend to all heating positions corresponding to the electronic device needed to be cooled, such that it may provide a sufficiently cooling effectiveness.

The invention is mainly to provide a diffusive cooling device including a plate body, on which a cavity recessed outwardly is formed and an opening is arranged; a web plate jointed at the upper side of the plate body correspondingly; a plurality of passing openings arranged on the web plate to act as air passages; a scroll fan arranged between the plate body and the web plate in corresponding to the opening; a shell body connected to the bottom of the plate body and jointed to the web plate correspondingly to enclose and prop up the plate body therein; and, an air inlet arranged at the front side of the shell body, through which ambient air is flowed into the shell body by the extracting and thrusting forces of the fan. During operation, airflow is generated along the cavity and extended to corresponding area of web plate to diffusively pass through the plural passing openings to achieve a cooling objective.

DETAILED DESCRIPTION OF THE INVENTION

Please refer toFIG. 1, which is a perspective view explosively showing the structure of the present invention. As shown in this figure, a cooling device according to the invention includes a plate body1, a bottom of which is extended outwardly to be formed as a bowl-shaped cavity11. In this case, the circumference of the cavity11is shown as an arc shape. In addition, the bottom of the plate body1is arranged an opening12penetrating through the bottom of the plate body1. Furthermore, the upper side of the plate body1is correspondingly jointed a web plate2, which is applied for supporting an electronic device, for example, notebook computer. The circumferential profile of the web plate2is same as that of the plate body1. A plurality of passing openings21functioned as air passages are arranged on the web plate2and are shown as circular holes' configuration in this embodiment. A rectangular through opening22is arranged on the web plate2at a position corresponding to the opening12of the plate body1. A top lid3is arranged over the through opening22for closing it. Again, a fan4is arranged between the opening12and the through opening22, as shown inFIG. 2. In this case, the fan4is a scroll fan, on top of which a fixing plate5is arranged for fixing a position of the fan4. Finally, a hollow shell body6is slantwise arranged under the plate body1for accommodating the cavity11projected from the plate body1. The shell body6is correspondingly jointed to the web plate2to enclose the plate body1therein. Furthermore, an air inlet61is arranged on the front face of the shell body6to act as an entrance of an ambient air, as shown in the cross-sectional view ofFIG. 4. The completely assembled view is shown inFIG. 3.

Please refer toFIG. 4andFIG. 5, which respectively are an operationally cross-sectional view and an operationally top view of the invention. As shown in these figures, after the fan4arranged in the cooling device starting an operation, a forced circulation generated by the starting operation of the fan4extracts cooling airs into the shell body6from the ambience via an air inlet61at front face of the shell body6, as shown by the arrows. The cooling airflow is further extracted and thrust by the fan4to enter the cavity11formed in the plate body1. Through the bowl-shaped structure of the cavity11, the airflow is diffused outwardly along the curved surfaces of the cavity11, as shown by the arrows ofFIG. 5, making the cooling air from the ambience fill the entire interior of the cavity11. Finally, the diffused airflows penetrate through the plural passing openings21arranged on the web plate2jointed correspondingly to the plate body1, as shown by the arrows ofFIG. 6. The airflows penetrating through the passing openings21make heat exchanging operation with the electronic device (not shown in the figure) attached on the web plate2to carry away the heat generated by the electronic device, and thus the electronic device may be kept under a normally working temperature.

Please refer toFIG. 7, which is a structurally cross-sectional view of a shell body according to another embodiment of the invention. As shown in this figure, the shell body6is a slant configuration viewed from the side thereof. A slantwise supporting plate62is designed in the interior of the shell body6for being inter-jointed to the bottom of the plate body1. In this case, a plurality of passing holes621are arranged on the supporting plate62at a position corresponding to the opening12arranged at the bottom of the plate body1to act as air inlets of the fan4. In addition, an accommodating space63is formed between the supporting plate62and the bottom of the shell body6to let the ambient air enter the accommodating space63via an open front side of the shell body6and further enter the cavity11of the plate body1via the passing holes621of the supporting plate62by means of the rotating operation of the fan4. After being diffused to the entire cavity11, the cooling air penetrates through a plurality of passing openings21arranged on the web plate2connected to the top of the cavity11to process a cooling operation. In addition, as shown inFIG. 8, except at the front side of the shell body6, the air inlet may be arranged at two sides of the shell body6, for example, the air inlets61aand61b, to increase the air inletting flow rate of the shell body6.

Please refer toFIG. 9, which is a top view of the web plate according to another embodiment of the invention. Except as a configuration of circular holes, as described thereinbefore, the passing openings21of the web plate2may also be designed as rectangular slots interspaced on the web plate2for facilitating the air in the cavity11in penetrating through the passing openings21, as shown in this figure.

Please refer toFIG. 10, which is a structurally perspective view of a fan according to another embodiment of the invention. Except a scroll fan, as described thereinbefore, the configuration of the fan4may also be an ordinary DC fan. Blocked by a top lid3, a forced airflow generated from the fan3is diffused along the curved surface of the cavity1to thereby achieve a same cooling effectiveness.

However, the aforementioned description is only a preferable embodiment according to the present invention, being not used to limit the patent scope of the invention, so equivalently structural variation made to the contents of the present invention, for example, description and drawings, is all covered by the claims claimed thereinafter.