JPS5919247Y2 - solar water heater - Google Patents

Description

[Detailed description of the invention] ``This invention relates to an improvement of a solar water heater using a heat pipe type solar collector.

A conventional solar hot water supply system A is as shown in FIGS. 1 and 2, and briefly described, the heat supply part 3 of the heat pipe type solar heat collector 1 is placed in a hot water supply tank 4 in a liquid-tight manner. The water supply tank 4 is inserted into the hot water supply tank 4 to store water 5 therein.

When sunlight hits the heat collector 1, it is converted into thermal energy in the heat collector plate 2', and the heat heats the heat pipe 2 and evaporates the working fluid inside the heat pipe 2.

The steam of the working fluid moves to the condensing part of the heat pipe, that is, the heat supply part 3, and gives latent heat of vaporization to the water 5 in the hot water supply tank, raising the temperature of the water 5 in the hot water supply tank, and hot water for hot water supply is obtained. It will be done.

However, due to manufacturing constraints, the heat supply section 3 of the heat pipe type heat collector 1 is not installed at the bottom but at a slightly higher position than the bottom, and therefore the part below the heat supply section 3 is a dead area. Therefore, the water in this area is not heated and remains cold.

On the other hand, since the simple solar water heater A uses a method of extracting hot water using gravity, the hot water outlet a is usually installed as close to the bottom of the hot water tank 4 as possible.

Therefore, even if the user tries to take out hot water, there is a drawback that cold water comes out first.

Furthermore, in practice, users often forget to replenish condensate water using hot water and leave the hot water tank 4 empty; in this case, the heat collector 1 becomes so-called dry-fired. The disadvantage is that the heat can cause deformation, damage, and performance deterioration.

The purpose of this invention is to provide a solar water heater that eliminates the above-mentioned conventional drawbacks, and its configuration is such that a hot water tank is used in a solar water heater that uses a heat pipe type solar collector. Divided into two units via a partition plate with good thermal conductivity, the upper chamber is for water storage, the lower chamber is for filling the latent heat storage element, and the lower chamber is liquid-tight for the heat supply part of the heat pipe type solar collector. A hot water supply pipe inserted into the building and extending from the upper chamber was installed to enable heat exchange.

As a result, the water for hot water supply is located above the heat supply section and the latent heat storage body heated by the heat supply section, and there is no dead area as in the conventional case.

Furthermore, when water is taken out, it is heated through heat exchange in the latent heat storage body in the lower chamber, so hot water can always be obtained.

Furthermore, even if the hot water tank becomes empty because the user neglects to replenish water, the heat supply part of the heat collector is covered with a latent heat storage body, so the hot water tank will not be left in an empty state.

The partition plate according to this invention is a metal plate or the like having good thermal conductivity, and the latent heat storage body is made of, for example, paraffin.

The embodiment shown in FIGS. 3 and 4 will be further described below.

The hot water tank 4 of the solar water heater 11 is divided into two upper and lower wheels by a partition plate 6.

The upper chamber is a water tank into which water 5 is placed.

The lower chamber is filled with paraffin as a latent heat storage body 7,
And the heat supply part 3 of the heat pipe type heat collector 1 is the latent heat storage body 7
It is inserted liquid-tight to prevent leakage.

Reference numeral 8 denotes a heat exchange portion of the hot water supply pipe 10, which is formed by joining the hot water supply pipe 10 to a single metal plate 9 in a meandering manner.

When the heat pipe type heat collector 1 collects solar heat, the heat supply part 3
The latent heat storage body 7 is warmed by this.

The latent heat storage body 7 has its operating temperature (in the case of paraffin, 50~
75°C), a phase change occurs in the heat storage body 7, and the heat storage body 7
absorbs heat without changing its temperature.

At the same time, the heat storage body 7 warms the water 5 via the partition plate 6.

When the valve 12 is opened, water 5 flows into the hot water pipe 1 due to gravity.
However, when passing through the heat exchange section 8 embedded in the latent heat storage body 7, the water is heat exchanged and sufficiently warmed, so that it is supplied as hot water.

After hot water is used, water is replenished from the replenishment port 13, but even if this is neglected, the heat supply part 3 of the heat collector 1 is surrounded by the latent heat storage body 7, and the so-called dry heating state will not occur, so the conventional No deformation, damage, or performance deterioration will occur.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional solar water heater using a heat pipe type solar collector, FIG. 2 is a sectional view thereof, and FIG. 3 is a sectional view of an embodiment of the solar water heater according to this invention. FIG. 4 is a perspective view of the heat exchange section. 1...Heat pipe type solar collector, 2...
... Heat pipe, 3 ... Heat supply section, 4 ...
...Hot water tank, 5...Water, 6...
・Partition plate, 7...Latent heat storage body, 8...
Heat exchange section, 10...Hot water supply pipe, A, 11.
...Solar water heater.

Claims (1)

[Scope of utility model registration request] In a solar water heater using a heat pipe type solar collector, the hot water tank is divided into two units via a partition plate with good thermal conductivity, with the upper chamber used for water storage and the lower chamber used for filling the latent heat storage body. , a solar water heating device characterized in that a heat supply part of a heat pipe type solar collector is liquid-tightly inserted into the lower chamber, and a hot water supply pipe extending from the upper chamber is installed to enable heat exchange. .