JPS595808Y2 - solar heat collector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solar heat collecting device, particularly a vacuum tube type device.

In order to improve the heat collection efficiency in this kind of conventional equipment, a reflector is placed below the outer tube, and the sunlight that could not be received by the upper surface of the heat collector fin is reflected by the reflector, and the lower surface of the heat collector fin is The reception is being held at

However, such a structure has the disadvantage that the device becomes complicated and costs increase.

The object of the present invention is to enable heat to be efficiently received even on the lower surface of the heat collecting fin with a simple structure.

Hereinafter, the embodiment will be explained with reference to the drawings. Reference numeral 1 denotes an outer tube made of a long transparent glass, the openings at both ends of which are sealed by fixing metal end plates 2, 2 with frit glass or the like, The air is removed by appropriate means to create a vacuum inside.

Reference numeral 3 denotes a heat collecting tube that hermetically penetrates the end plates 2, 2 and is coaxially arranged inside the outer tube 1, and the outer surface of the tube located inside the outer tube 1 is provided with a metal plate with good heat absorption and heat conduction. A heat collecting fin 4 whose width is narrower than the inner diameter of the outer tube 1 is fixed to the fin 4.
Both sides are facing up and down when the device is installed.

Reference numeral 5 denotes a vapor deposition surface formed by heating and evaporating a getter such as barium on the entire inner surface of the lower half of the outer tube 1 facing the lower surface of the heat collecting fin 4. The explanation will be based on.

First, prepare a plurality of annular containers 6 made of metal with a high melting point such as stainless steel, and open the containers 6 at the bottom.
Barium etc. 7 is injected into the tube as a getter material, and this container 6 is placed below the heat collecting fins 4 in the outer tube 1 at intervals in the longitudinal direction of the tube using appropriate fixing means. and place it.

Then, the end plates 2, 2 are attached to the outer tube 1, air is removed from the inside, and in this state, the barium etc. 7 are sequentially heated from the outside by the high frequency induction coil 8.
Point the flash direction downward and flash.

Therefore, barium etc. 7 is deposited on the entire inner surface of the lower half of the outer tube 1 to form a deposition surface 5 that reflects sunlight.
Also, the flash absorbs gas, etc. inside the outer tube 1 and increases the degree of vacuum inside.

Thus, sunlight from above the apparatus is directly received by the upper surface of the heat collection fins 4, and sunlight that leaves the fins 4 and reaches the lower part is reflected upward by the vapor deposition surface 5 and is received by the lower surface of the fins 4.

Therefore, the heat collecting fins 4 efficiently receive solar heat from the upper and lower surfaces and heat the heat collecting tubes 3.

Further, since the inside of the outer tube 1 is maintained in a vacuum, the amount of heat dissipated to the outside is extremely small due to the sufficient heat insulation effect.

As mentioned above, the present invention involves inserting a heat collecting tube into a translucent outer tube, fixing to this heat collecting tube a heat collecting fin that receives solar heat and having a width narrower than the inner diameter of the outer tube. The inside of the outer tube is sealed to create a vacuum state, and a getter with a flashing direction directed downward is disposed below the heat collecting fin in the outer tube. Since the vapor-deposited surface is shaped like a vapor-deposited surface, it is possible to receive light on the top surface of the heat collecting fin and also receive reflected light on the bottom surface of the fin, allowing the heat-collecting fin to efficiently receive heat. Since it can be done at the same time, the work is simple, and the structure is simple because no separate reflecting plate is provided.

Further, even if the width of the heat collecting fins is narrowed, heat can be efficiently collected, and the cost of materials required for the heat collecting fins can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a plan sectional view of the device according to the present invention, FIG. 2 is a side sectional view thereof, and FIG. 3 is a side sectional view showing the shape and method of the reflecting surface. 5... Reflective surface, 7... Barium, etc.

Claims (1)

[Scope of utility model registration request] A heat collection tube is inserted into the translucent outer tube, and a heat collection fin that receives solar heat and whose width is narrower than the inner diameter of the outer tube is fixed to this heat collection tube, and the end of the outer tube is sealed to seal the inside. Under the vacuum condition, a getter with the flash direction directed downward is placed below the heat collecting fins in the outer tube, and this getter is flashed to form a vapor deposition surface on the inner surface of the outer tube below the heat collecting fins. A solar heat collection device characterized by: