JPS5952737B2 - solar heat collector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides heat absorbing fins at the upper end of a heat collecting plate to efficiently absorb direct solar radiation from the sun with a solar heat absorbing liquid.

A conventional flat plate type heat collector will be explained using FIG. 4.

Reference numeral 1 denotes a transparent film that transmits solar heat, and is individually fixed on the upper surface of the outer box 2 with a presser metal fitting 3.

A heat collecting plate 4 is provided inside the outer box 2, and a plurality of water channels 5 are formed in the heat collecting plate 4 for transmitting the collected heat to a liquid such as water.

A heat insulating material 6 made of glass wool or the like is provided between the heat collecting plate 4 and the outer box 2.

Therefore, the solar heat absorbed by the heat collecting plate 4 is transferred to the liquid in the water channel 5, and this high temperature liquid is recovered or circulated and used for hot water supply, air conditioning, etc.

However, although this method was able to absorb the amount of solar radiation that directly reached the heat collector plate 4, since the heat collector was made with a sealed structure, heat radiation from the heat collector plate 4 heated to a high temperature caused the inside of the heat collector to be absorbed. The atmosphere was at a high temperature, and therefore the heat loss due to heat radiation from the outer box 2 was large.

The present invention eliminates the drawbacks of the prior art.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3 of the drawings.

Reference numeral 1 denotes a transparent film that transmits solar heat and is fixed to the upper surface of the outer box 2 with a presser metal fitting 3.

A heat collecting plate 4 is provided inside the outer box 2, and two chambers, an upper chamber and a lower chamber 8, which are partitioned by the heat collecting plate 4, are communicated with each other through communication holes 9 and 10 at both ends, so that air can be circulated by convection.

Note that an outer box heat insulating material 6 is attached to the bottom of the outer box 2.

The heat collecting plate 4 also has a plurality of water channels 5 for transmitting the collected heat to a liquid such as water, a liquid inlet 11 and an outlet 12 to the heat collecting plate 4, a liquid inlet 11 and an outlet 12, and the above-mentioned. An artificial header 13 connecting the waterway 5 and an outlet header 14 are provided at the upper end of the heat collecting plate 4, and heat absorbing fins 15 are provided at the inlet header 13.
is attached thermally integrally with the heat collecting plate 4.

Further, a heat collecting plate heat insulating material 16 is attached to the surface of the heat collecting plate 4 on the lower chamber 8 side.

Next, to explain the present invention in detail, first, the outer box 2 is tilted so that one end of the heat collecting plate 4, on which the heat absorbing fins 5 are provided, is on the upper side, and the liquid flowing through the water channel 5 of the heat collecting plate 4 is The arrangement is such that natural convection of air within the space within the outer box 2 is promoted.

In operation, first, sunlight hits the transparent film 1.
The sunlight passing through hits the surface of the heat collecting plate 4.

Since the surface of the heat collecting plate 4 is painted black, it absorbs sunlight efficiently and the temperature of the heat collecting plate 4 itself increases.

At this time, if the liquid is forced to circulate in the water channel 5, the heat absorbed by the heat collecting plate 4 will be transferred to the liquid, and this high temperature liquid will be recovered or circulated and used for hot water supply, air conditioning, etc. Since the heat plate 4 itself is at a high temperature, heat is dissipated from the heat collecting plate 4 itself.

Therefore, the ambient temperature inside the heat collector becomes high, and especially the upper part of the heat collector where the heat absorption fins 15 are provided becomes even hotter, so the heat of this high temperature air is transferred to the low temperature water passing through the inlet header 13 via the heat absorption fins 15. This is what I want to convey to you.

The air that has been cooled by imparting heat to the heat absorbing fins 15 passes through the communication hole 9 at the upper end and descends into the lower chamber 9 of the heat collector, and then rises to the upper chamber 7 through the communication hole 10 at the lower end.

That is, the natural circulation of the air in the heat collector is enhanced by the heat absorbing fins 15.

This natural circulation is intended to efficiently transfer the heat of the high temperature atmosphere inside the heat collector to the liquid flowing inside the heat collecting plate 4.

Also, in order to further increase the natural circulation power, the upper room 7 and the royal room 8
It is better to increase the temperature difference between the air and the heat collecting plate 4.
A heat collecting plate heat insulating material 16 is pasted on the side surface of the royal room 8.

The solar heat collector of the present invention recovers the heat from the high-temperature atmosphere inside the collector into liquid via the heat absorption fins, so the inside of the collector is kept at a relatively low temperature, so there is no loss of heat radiation to the outside from the outer box etc. The heat collector has excellent effects such as a reduction in energy consumption and a simple structure that is not much different from a conventional heat collector because only heat absorbing fins are provided.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a solar heat collector in an embodiment of the present invention, Fig. 2 is a partial sectional view of a heat collecting plate, and Fig. 3 is a longitudinal sectional view of a solar heat collector in an embodiment of the present invention.
-x' line cross-sectional view, FIG. 4 is a cross-sectional view of a conventional solar heat collector. 2...outer box, 4...heat collection plate, 15...
Endothermic fin.

Claims (1)

[Claims] 1 A heat collection plate that absorbs solar heat is installed inside the outer box with a transparent membrane on the top surface, and the two upper and lower air chambers separated by this heat collection plate are communicated at both ends to enable convection circulation. In addition to circulating liquid for solar heat absorption in the heat collecting plate, a heat absorbing fin and in are provided at the upper end of the heat collecting plate, an inlet header is provided opposite to this heat absorbing fin, and a heat insulating material is pasted on the royal side surface of the heat collecting plate. solar heat collector.