JPS589738Y2 - solar collector - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a normal overheating prevention device for solar collectors.

Shakuyo Heat Collection Pilgrimage (In case of power outage or when the pipes become clogged and the circulation of the heating medium stops or air pockets occur, in other words, when the heating becomes dry), it is usually heated.2. Damage occurs due to high temperature and pressure.

In particular, vacuum insulation type heat collectors have had problems such as the vacuum being destroyed.

The present invention has been devised in view of this point, and one embodiment will be described below with reference to the drawings.

1 is a translucent outer tube made of glass or the like with both ends connected to the ground by metal stems 2 and the interior is evacuated; 3 is disposed coaxially within the translucent outer tube 1, with both ends protruding from the stem 2; The copper inner tube serves as a heat transfer path for water, etc.

Reference numeral 4 denotes a heat collecting plate made of aluminum, iron, or copper, and the inner tube 3 is forcibly fitted into an Ω-shaped fitting groove 5 provided at the center of the plate.

Reference numeral 6 denotes an appropriate number of expansion members that are slidably attached to the back surface of the heat collecting plate 4 and whose ends are engaged in guide grooves 7 formed at both ends of the heat collecting plate 4. The expansion member 6 is made of a larger material, for example, when the heat collecting plate 4 is made of aluminum, copper is used for the expansion member 6, when the heat collecting plate 4 is made of iron, aluminum is used, or when the heat collecting plate 4 is made of iron, zinc is used.

Usually, there is a small gap between the tip of the expansion member 6 and the inner part of the guide groove 7 of the heat collecting plate, so that when the heat collector is in an empty state, the heat collecting plate 4 and the expansion member 6 When the expansion member 6 is overheated, the coefficient of thermal expansion of the expansion member 6 is larger than that of the heat collection plate 4.
are expanded as shown in Figure 4.

Therefore, a gap is created at the fitting part between the heat collecting plate 4 and the inner tube 3, and this gap creates a large thermal resistance between the heat collecting plate 4 and the inner tube 3, so that abnormal heating of the inner tube 3 does not occur. do not have.

As mentioned above, the present invention can be used in the event of any kind of accident.l) When the heat medium stops circulating, the expansion member pushes the heat collecting plate apart and separates the contact part with the inner tube. If the pressure is low, abnormal heating will be prevented, and in particular, it will prevent discoloration such as drooping of the inner tube and damage to the inner tube (in the case of a vacuum, vacuum breakdown, etc.). G) Effect j・N・play.

[Brief explanation of drawings]

The figures are all of the Shakyo heat collector of the present invention. Fig. 1 is a perspective view of the J body, Fig. 2 is a perspective view with the outer tube removed, Fig. 3 is a sectional view,
FIG. 4 is a sectional view illustrating an abnormal situation. 1... Outer pipe, 3... Inner pipe, 4...
... Heat collecting plate, 6... Expansion member.

Claims (1)

[Scope of utility model registration request] An inner tube that serves as a heat medium path is installed inside a translucent outer tube, and a heat collecting plate is attached to the inner tube as a thermal body, and the inner tube is fitted into a fitting groove formed in the heat collecting plate. A solar heat collector, wherein the heat collecting plate is provided with an expansion member having a coefficient of thermal expansion larger than that of the heat collecting plate and expanding a fitting groove in the event of an abnormality.