JPH0233094Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention relates to an improvement of a solar heat collecting device that uses solar heat to heat a medium such as water and supplies hot water for hot water supply or space heating.

<Conventional technology> Solar heat collectors are installed, for example, on the south-facing roof of a building, and are either of the water-tube type, which circulates water through water pipes inside the housing and heats the water directly, or use heat pipes. There are devices that exchange heat with the water in the tank, and are used for space heating and hot water supply. However, the initial equipment costs for these solar heat collectors are relatively high;
Equipment costs are recovered through savings in fuel costs, and profits are made after equipment costs are recovered, so high efficiency and durability are required. Therefore, since moisture intrusion into solar heat collectors leads to a decline in performance and durability,
Must be sufficiently waterproof.

<Problem that the invention aims to solve> However, the main purpose of waterproofing measures for conventional solar heat collectors is to prevent rainwater from entering from outside, and once rainwater has entered the solar heat collector, Countermeasures against the condensation water that occurred were not sufficient. That is, conventional solar heat collectors are not provided with drainage holes at all. Therefore, moisture that enters and stays inside the solar heat collector corrodes the housing, the heat insulating material, or the heat collector, resulting in a loss of durability and a reduction in the performance of the heat collector. Alternatively, expensive corrosion-resistant materials had to be used, resulting in an economic disadvantage.

<Means for Solving the Problems> The present invention was devised in view of the above, and has a structure in which one end is opened inside the housing and the other end is opened to the outside of the housing at the lower end of the housing that houses the heat collector. Forms a drainage hole that opens,
A bent part is provided in the middle of the water drain hole.

<Example> Hereinafter, an example of the present invention will be described with reference to the drawings. 1 is a solar heat collector, in which foamed urethane, glass wool, etc. A heat collector 6 is housed in a casing 5 filled with a heat insulating material 4 such as the following. The heat collector 6 has a plurality of parallel recesses formed in a heat collection plate 7, a water pipe 8 fitted into each recess, and headers 9, 9 welded to the top and bottom of each water pipe 8. A selective absorption film is formed on the surface of the heat collecting plate 7, which selects and absorbs the wavelength of sunlight with the highest thermal efficiency, thereby preventing the heat once absorbed from escaping as much as possible. A support frame 1 is provided on the upper surface of the heat collector 6.
A transparent body 11 such as transparent glass supported by 0 is fitted through a bead 12. The casing 5 and the transparent body 11 protect the heat collector 6 from rainwater, dust, etc., and also keep the inside of the solar heat collector 1 warm.

The above-mentioned casing 5 is provided with a drain hole 13. For example, as shown in FIG.
3a opens at the lower end of the bottom plate 2a of the interior panel material 2, and the other end 13b opens below the side wall 3a of the exterior panel material 3, and bends at an almost right angle within the heat insulating material 4 in the middle of its length to form a bent portion. 13c. Such a drain hole 13 may be opened from the lower end of the side wall 2b of the interior panel material 2 toward the bottom plate 3b of the exterior panel material 3, as shown by the dotted line in FIG. It's good if you do. In addition, drain hole 13
The position and number of the elements are not limited to the embodiments shown in the drawings, and can be set as appropriate.

According to the present invention, rainwater that has entered the solar heat collector 1 or dew water that has formed inside the solar heat collector 1 can be easily discharged to the outside from the drain hole 13. In addition, rainwater sprayed from the outside is prevented from further infiltration by the bent portion 13c of the drain hole 13, so no rainwater intrudes from the outside. Therefore, there is no deterioration in the performance of the heat collector 6 or corrosion of the casing 5, and durability is improved. Also,
It is economical as it allows the use of inexpensive materials with poor corrosion resistance.

Although the above explanation was about a solar heat collector using a water tube type heat collector, it can also be applied to a solar heat collector using a heat pipe type heat collector and other heat collectors. Needless to say.

<Effects of the invention> According to the invention, rainwater that has entered the solar heat collector and dew water generated inside can be easily discharged to the outside. Therefore, the present invention does not reduce the performance of the heat collector due to moisture, can efficiently collect heat, does not corrode the casing due to moisture, improves durability, and allows the use of inexpensive materials, making it ultimately economical. It is of high practical value as it can provide a solar heat collector.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a solar heat collector, and FIG. 2 is a sectional view taken along the line -- in FIG. 1... Solar heat collector, 5... Housing, 6...
Heat collector, 13... Water drain hole.

Claims (1)

[Scope of utility model registration request] A drain hole is formed at the lower end of the casing that houses the heat collector, one end of which opens inside the casing and the other end opens to the outside of the casing, and a bent part is provided in the middle of the drain hole. Solar heat collector.