JPS5930846Y2 - Flat plate solar collector - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a flat plate type solar heat collector, and in particular aims to reduce the weight and cost of the heat collector.

In general, a flat plate type solar heat collector is a flat plate type housing with an open top surface and a transparent plate provided with a heat insulating layer, a heat collector is housed on the heat insulating layer, and sunlight is collected through the transparent plate. It is applied to a heating element and also isolates the inside of the casing from the outside atmosphere.

The heat collector consists of a heat collector plate and a plurality of heat collector tubes attached to the heat collector plate. As shown in FIG. It protrudes to the outside from the casing a and is connected to the water pipe 3 outside the casing a.

Since the header tube protrudes to the outside of the housing in this way, there is a risk that it may be deformed by external force during transportation or installation work of the heat collector, so conventionally, thick-walled tubes have been used as the header tubes.

As a result, not only the weight of the heat collector increases, but also the cost.

In view of this, the present invention was developed after various studies and it was discovered that almost no external force acts on the header pipe housed in the housing, and corrosion problems should be taken into account. This is a developed heat exchanger, in which multiple heat collecting pipes attached to a heat collecting plate are connected to header pipes and housed in a flat housing, with the ends of the header pipes protruding from the housing to form water pipes. In a solar heat collector equipped with a connection part, the header pipe inside the case is thin-walled, the header pipe protruding from the case is thick-walled, and the thick-walled header pipe is connected to the thin-walled header pipe inside the case. This is a characteristic feature.

This will be explained in detail using the drawings.

Figure 2 shows a cross section of the main parts of an embodiment of the flat plate type solar heat collector of the present invention. The heat collecting pipe 1 of the heat collecting body housed in the housing a is connected to the header pipe 2,
The header pipe 2 consists of a thin-walled pipe section 2a inside the casing a and a thick-walled pipe section 2b that penetrates the casing a and projects to the outside.
a and 2 b are joined by brazing etc. in the case a,
A water passage pipe 3 is connected to a thick-walled pipe portion 2b that protrudes to the outside of the casing a.

The flat plate type solar heat collector of the present invention has the above structure, and the header pipe inside the housing is not subjected to strong external force, so it is only necessary to take into account corrosion of the fluid flowing inside the pipe. For example, when using a steel pipe, there are some differences depending on the internal fluid material, but generally the thickness is 0.
．． 5-1. In many cases, a thin-walled tube of Q mm is sufficient.

Further, the header pipe protruding from the housing to the outside may be a thick-walled pipe that can sufficiently withstand external forces, and the thin-walled header pipe and the thick-walled header pipe may be connected within the housing so as to prevent liquid leakage.

Generally, most of the header pipe is housed within the casing, and making this part thinner greatly reduces the weight and cost of the heat collector.

Furthermore, since the header tube that protrudes from the housing is very small, even if the wall is made thick enough to withstand external forces, the effect will be small.

As described above, the present invention has the remarkable effect of providing a lightweight and inexpensive flat plate type solar heat collector that has sufficient reliability against external forces.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the main parts of a conventional flat plate type solar heat collector, and FIG. 2 is a sectional view showing the main parts of the flat plate type solar heat collector of the present invention. a... Housing, 1... Heat collection pipe, 2...
...Header pipe, 3... Water pipe.

Claims (1)

[Scope of utility model registration request] A solar heat collector in which multiple heat collecting pipes attached to a heat collecting plate are connected to header pipes and housed in a flat housing, with the ends of the header pipes protruding from the housing to provide a connection part for water pipes. In a heating device, a flat plate solar heat collector is characterized in that the header tube inside the housing is thin-walled, the header tube protruding from the housing is thick-walled, and the thick-walled header tube is connected to the thin-walled header tube inside the housing. vessel.