Patent Application
20090109623
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1. Field of the Invention
The present invention relates generally to a heat-radiating module, and more particularly to an innovative module which features composite phase-change heat-radiating efficiency.
2. Description of Related Art Including Information Disclosed Under 37 CFR 1.97 and 37 CFR 1.98.
In tune with the high-performance development trend of relevant electronics and computer products, heat-radiating modules are developed to improve heat-radiating efficiency.
Because traditional heat-radiating modules cannot structurally meet the heat-radiating demand of relevant equipment, inventors strive to develop a variety of heat-radiating modules with composite heat-radiating mechanisms, with the purpose of improving the heat-radiating performance. For example, there is a structure combining the cooling pad with a heat pipe (referenced by Taiwanese patent claims in Taiwanese Patent No. 89205047), and there a structure combining the cooling pad with phase-change materials for a brand new processing method (demonstrated by “Heating-Radiating Device” specified in Taiwanese patent claims in Taiwanese Patent No. 93110297 and Taiwanese Patent No. 94128483). This cooling pad is equipped with a chamber to accommodate phase-change materials, which improve the heat-radiating effect to suppress high temperatures through phase transformation (liquid-phase and gas-phase) when reaching a preset temperature.
It is imperative that the heat-radiating modules improve the heat-radiating efficiency. For some products and equipment (e.g. LED) with intermittent operation, it is also urgently required to maintain a certain operating temperature for more smooth startup and operation. In fact, the typical heat-radiating modules are only for improving heat-radiating performance. Therefore, other electronic components are incorporated into the existing products to maintain the operating temperature, leading to higher costs and power consumption.
Thus, to overcome the aforementioned problems of the prior art, it would be an advancement in the art to provide an improved structure that can significantly improve efficacy.
Therefore, the inventor has provided the present invention of practicability after deliberate design and evaluation based on years of experience in the production, development and design of related products.
Referring to
The features and the advantages of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.
The heat-radiating module A comprises a cooling pad 10, which is a predefined three-dimensional structure (e.g. rectangular block), provided with heating portion 11 and radiating portion 12.
A first chamber 20 is assembled at a preset location within the cooling pad 10.
A first phase-change material 30 is placed within the first chamber 20.
A second chamber 40 is assembled into the cooling pad 10 and separated from the first chamber 20.
A second phase-change material 50 is placed within the second chamber 40. The reaction temperature of the second phase-change material 50 and first phase-change material 30 differs from each other.
The radiating portion 12 of the cooling pad 10 is fitted with a heat pipe 60. One end of is a heat-absorbing end 61 penetrating into the first chamber 20 of the cooling pad 10, and the other end is a radiating end 62 protruding from the cooling pad 10. The radiating portion 12 is assembled with a plurality of heat-radiating fins 63.
The phase-change material can generate physical transformation, e.g. transformation between solid and liquid phase. According to physics principles, a melted substance will transform from solid to liquid phase with energy consumption, and the energy will be saved in the form of latent heat as long as the liquid state is maintained. Said latent heat will be released again and transformed from liquid to solid phase, once the liquid substance is solidified. Said phase-change material is made of olefin, inorganic salt, salt hydrate and a mixture, carboxylic acid and sugar alcohol products. In the present invention, the different reaction temperature between the first phase-change material 30 and second phase-change material 50 can be realized through phase-change materials of different properties.
Based upon above-specified structures, the present invention is operated as follows:
Said first and second chambers 20, 40 separately accommodate the first and second phase-change materials 30, 50 of different reaction temperatures. For example, if the reaction temperature of the first phase-change material 30 is set to 40° C. and if the reaction temperature of the second phase-change material 50 is set to 30° C., then the second phase-change material 50 will assist in heat-absorbing and store the latent heat through phase transformation, when the operating temperature of cooling pad 10 exceeds 30° C. Thus, the second phase-change material 50 suppresses and mitigates temperature rise to some extent. Once the heat absorbability of second phase-change material 50 is saturated, the temperature of the cooling pad 10 will rise continuously until reaching 40° C. In such a case, the first phase-change material 30 will generate phase-change and assist in heat-absorbing, making it possible to restrain the temperature of cooling pad 10. Conversely, when the operating temperature of the cooling pad 10 declines below 40° C., the first phase-change material 30 will release the latent heat to slow down the temperature drop until latent heat is fully released. Next, when the operating temperature of the cooling pad 10 declines below 30° C., the first phase-change material 30 will release the latent heat to further slow down the temperature drop. As such, the operating temperature of the cooling pad 10 can be maintained at a preset range (e.g. 30° C. ˜40° C.).
The temperature change is shown in
Referring also to
