Solar Roof-Ventilating Device
A solar roof-ventilating device for compulsorily generating the flow of indoor and outdoor air includes a hollow ventilating casing provided on the roof to communicate the inside and outside of the roof with each other. The interior of the ventilating casing is provided with a heat dissipator constituted of a plurality of heat-dissipating pieces. A plurality of heat-conducting pipes penetrates through the heat dissipator. The other end of the heat-conducting pipe is connected to a heat-absorbing plate made of heat-absorbing materials. The front of the heat-absorbing plate is coated with a layer of black coating to facilitate the heat-absorbing speed of the heat-absorbing plate. Therefore, after the heat-absorbing plate has absorbed the solar energy, the heat can be conducted to the heat dissipator via the heat-conducting pipe. In this way, the temperature of the heat dissipator increases to generate a rising hot air, thereby to compulsorily cause the flow of the indoor air and achieve the ventilating effect.
1. Field of the Invention
The present invention relates to a ventilating device, and in particular to a non-powered ventilating device provided on the roof.
2. Description of Prior Art
Since the weather in summer is extremely hot, it is an important issue to reduce the influence caused by the hot weather on our life. With the progress of technology, some convenient devices such as electric fan and air conditioner can provide us a cool and comfortable indoor environment in summer. However, the closed environment in air-conditioning operation adversely brings us additional problems, such as high power consumption and influence on health. Therefore, it is necessary to use a natural way to overcome the problem that the indoor environment is sultry due to the boiling hot weather.
In general buildings, the natural way of ventilating is to use the door and window as the paths of airflow. However, in view of confidentiality and safety, the door and window should be closed, which adversely affects or impede the flow of air. Since the hot air can rise, even though the door and window are opened, the hot air will still stay in the top of the building due to the orientation of the building, which causes the indoor environment sultry and poor ventilation. Especially, it is necessary for a common plant to have good ventilation. Since the indoor environment of the plant is much wider than that of a common house, general doors and windows in the plant cannot satisfy the demand for the ventilation and heat dissipation. Therefore, it is a common way of facilitating the flow of air to additionally mount air-extracting apparatuses on the doors and windows. On the other hand, these air-extracting apparatuses consume a lot of energy and thus substantially increase the cost. Although spraying water on the roof is a feasible way of reducing the temperature of indoor air, the heat-dissipating effect thereof is limited. Further, such solution consumes too much energy and water.
Therefore, in order to generate a good indoor environment and reduce the cost, a solution of providing the windows and doors on the roof to exhaust the hot air collected in the roof is proposed. Although providing the windows and doors directly on the roof is convenient in exhausting the hot air, unfortunately, it makes the roof unshielded and thus exposed to the sun and rain. If a canopy is additionally provided, the ventilating effect will be inevitably affected. Therefore, a conventional art discloses a non-powered turbine-based ventilating device 10 provided on the roof. As shown in
However, in the above-mentioned design, it utilizes the difference in temperature between the indoor and outdoor air to generate the flow of hot air. In addition, with the outdoor wind blowing the blades 101 of the ventilating device 10, the flow of air can be facilitated. Therefore, such solution is a passive way to generate the airflow. The key factor about whether the ventilating device 10 operates smoothly or not is the difference in temperature between the indoor and outdoor air. If the difference in temperature between the indoor and outdoor air is not large enough, or the outdoor temperature is higher than the indoor temperature, a compulsory airflow cannot be generated. As a result, the device 10 cannot perform a satisfactory ventilating effect. Further, if there is no wind in the outdoor environment, the blades 101 cannot rotate for lack of power. As a result, the turbine-based ventilating device 10 cannot generate a ventilating effect. Therefore, there is still much room for improvement.
SUMMARY OF THE INVENTIONIn view of the above drawbacks, the present invention is to provide a solar roof-ventilating device, which is capable of compulsorily generating the communication between the indoor and outdoor air. The solar energy is conducted to a heat dissipator formed of a plurality of heat-dissipating pieces via heat-conducting pipes, thereby to increase the temperature of the heat dissipator. Then, the heat dissipator performs the heat exchange with the surrounding cool air to generate hot air, thereby to dissipate the heat. By using the phenomenon that hot air rises, the indoor air can be compulsorily caused to flow, thereby to achieve the ventilating effect.
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Although the present invention has been described with reference to the foregoing preferred embodiments, it will be understood that the invention is not limited to the details thereof. Various equivalent variations and modifications can still be occurred to those skilled in this art in view of the teachings of the present invention. Thus, all such variations and equivalent modifications are also embraced within the scope of the invention as defined in the appended claims.
Claims
1. A solar roof-ventilating device, comprising:
- a ventilating casing being a hollow casing and mounted on the roof for communicating the indoor and outdoor environments;
- a heat dissipator provided within the ventilating casing;
- a heat-conducting pipe having a heat-dissipating end and a heat-absorbing end, the heat-dissipating end of the heat-conducting pipe penetrating through the heat dissipator; and
- a heat-absorbing plate connected to the heat-absorbing end of the heat-conducting pipe.
2. The solar roof-ventilating device according to claim 1, wherein the heat dissipater is constituted of a plurality of heat-dissipating pieces.
3. The solar roof-ventilating device according to claim 2, wherein the heat-dissipating piece is made of any one of copper, aluminum, iron or carbon.
4. The solar roof-ventilating device according to claim 1, wherein the heat-conducting pipe is either a heat pipe or a cool water pipe.
5. The solar roof-ventilating device according to claim 1, wherein a covering piece covers on the heat-absorbing end.
6. The solar roof-ventilating device according to claim 5, wherein the covering piece is formed into a Ω-lettered shape to cover on the heat-absorbing end.
7. The solar roof-ventilating device according to claim 5, wherein the covering piece is 20 made of any one of copper, aluminum, iron or carbon
8. The solar roof-ventilating device according to claim 1, wherein the heat-conducting pipe is formed into a U-lettered shape to penetrate through the heat dissipator.
9. The solar roof-ventilating device according to claim 1, wherein the heat-conducting pipes are arranged at intervals to penetrate through the heat dissipator.
10. The solar roof-ventilating device according to claim 1, wherein the heat-conducting pipes are stacked to penetrate through the heat dissipator.
11. The solar roof-ventilating device according to claim 1, wherein the heat-absorbing plate is made of a heat-conducting material.
12. The solar roof-ventilating device according to claim 1, wherein the heat-absorbing plate is made of any one of copper, aluminum, iron or carbon
13. The solar roof-ventilating device according to claim 1, wherein the heat-absorbing plate has a heat-absorbing surface.
14. The solar roof-ventilating device according to claim 13, wherein the heat-absorbing surface is coated with a layer of black material.
15. The solar roof-ventilating device according to claim 13, wherein the heat-absorbing surface is coated with a black coating.
Type: Application
Filed: Dec 30, 2006
Publication Date: Sep 27, 2007
Inventor: Shih H. Chen (Yongkang City)
Application Number: 11/618,823
International Classification: F24F 7/00 (20060101); F24F 13/02 (20060101);