JPS596367Y2 - Solar collector plate - Google Patents

Description

[Detailed description of the invention] This invention relates to a heat collecting plate manufactured in one piece in a solar collector, and its main purpose is to prevent piping work during the assembly process and installation of the heat collector. The purpose is to facilitate.

FIG. 1 is a perspective sectional view for explaining a solar collector.

1 is a transparent cover, 2 is a heat insulating material, 3 is a heat collecting plate, 4 is an outlet or inlet pipe, and 5 is a box.

The present invention relates to a heat collecting plate 3 and an inlet/outlet pipe 4.

Various methods have been considered for manufacturing the heat collecting plate 3, but methods suitable for mass production and allowing freedom in designing the water pipes of the heat collecting plate include the roll bonding method using aluminum plates and the clam shell method using reinforced plastic plates. One example is the one-piece method.

FIG. 2 shows the water tube pattern of the heat collecting plate of such a conventional integral hollow type product.

4A is an inlet pipe, 4B is an outlet pipe, 6A is a lower header, 6B is an upper header, 7 is a heat collection tube, and 8 is a fan section.

The inlet/outlet pipes 4A, 4B are formed by being inserted between two original plates of heat collecting plates when an integral type is formed.

In such conventional heat collecting plates, the inlet pipe 4A is often provided at the lower part of the heat collecting plate, and the outlet pipe 4B is often provided at the upper part in opposite directions.

For this reason, when installing and piping a heat collector on the roof, for example, the inbound conduit connected to the outlet pipe 4B is bundled with the outbound conduit connected to the inlet pipe 4A up to the vicinity of the inlet pipe and fixed. However, piping from that point to the outlet pipe 4B must be separately installed and fixed.

This is a tedious task on the roof, but if the inlet and outlet pipes are in the same direction, the plumbing work will be easier.

Furthermore, sealing portions of the inlet/outlet pipes 4A, 4B that penetrate the box body 5 against rainwater require complicated assembly work.

An example of this is shown in FIG. In FIG. 3, a rubber packing 9 prevents rainwater from entering the box body 5.

10 is a holding plate, 11 is a screw, and these rubber packings 9
is fixed to the box body 5.

If the inlet/outlet pipes are provided in opposite directions, as in the past, the complicated seal assembly operation as shown in FIG. 3 must be performed at two locations.

Further, as shown in FIG. 4, in the conventional solar collector, there is a relationship L>M in the dimensions of the heat collector plate to which the box 5 and the inlet/outlet pipes 4A, 4B are fixed.

Therefore, in order to manufacture a heat collector by passing the inlet/outlet pipes 4A, 4B through the box 5, as can be easily inferred, complicated processing and assembly procedures of the box 5 are required.

The present invention solves the drawbacks of the conventional heat collecting plate, and the present invention will be explained below using specific examples.

FIG. 5 shows the water tube pattern of the integrated heat collecting plate according to the present invention.

The explanation overlaps with FIG. 2. Parts will be omitted.

12 is a header extension pipe in the heat collecting plate 3 that connects the header 6B and the outlet pipe 4B, and 13 is a bent pipe portion thereof.

FIG. 6 is a diagram showing an example of the use of the solar collector of the present invention.

14 is a bathtub, 15 is a pump, 16 is an outgoing pipe, 17 is a solar collector according to the present invention, 18 is a return pipe, and 19 is a water tap to the bathtub.

The reason why the inlet and outlet pipes 4A and 4B are provided in vertically opposite directions in the water tube pattern of the conventional heat collecting plate is that in the case of metal pipes, the headers 6A and 6B and the heat collecting thin tubes 7
This is because when forming a heat collecting plate by shaping the fin portion 8 with a metal plate and combining them to form a heat collecting plate, it is easier to manufacture a woodwind pattern that is as simple as possible.

However, in the case of a monolithic heat collecting plate using the roll bond method or the clam shell method as in the present invention, the production cost remains almost the same even if the water pipe pattern is complicated as shown in FIG.

Another reason why the inlet and outlet pipes 6A and 6B are provided diametrically opposite is the problem of air removal from the water pipes.

In conventional solar collectors, air in the water pipes is vented by installing air vent valves above the inlet and outlet pipes.

This is because the air in the woodwind was thought to always rise upwards.

However, according to the results of experiments, the smoothness of the inner surface, cross-sectional shape and cross-sectional area of the header extension pipe 12 in FIG.
It has been found that by setting the radius of curvature of No. 3 and the flow rate of the heat collecting plate to appropriate values, water expels air and air does not necessarily remain in the header extension pipe 12 or return pipe 18.

For example, a rubber hose with a diameter of 15 mm has a radius of curvature of 2 cm.
Even when bent in three places, the flow rate is 1 l/min.
If this is the case, the air in the rubber hose will move from above to below due to the flow of water.

That is, even in the wood pipe pattern shown in FIG. 5, no air remains in the water pipes of the heat collecting plate.

As shown in Figure 6, an open heat storage tank (bathtub 14 in the figure)
If the solar collector 17 according to the present invention is used, the outgoing pipe 16
In a steady state after the air in the water pipe of the heat collecting plate in the solar collector 17 and the return pipe line 18 has been expelled by the flow of water sent by the pump 15, the load on the pump 15 is due to the siphon effect. becomes very small.

At this time, as the piping material to be used for the outgoing pipe line 16 and the incoming pipe line 18, use a somewhat flexible piping material, such as a polyolefin resin piping material, rather than a hard one that can be bent at right angles using an elbow or the like. It's better to be there.

When the heat collecting plate of the present invention is used, since the inlet and outlet pipes 4A and 4B are in the same direction, the outgoing pipe line 16 and the incoming pipe line 18 can be connected and fixed to the inlet and outlet pipes 4A and 4B at the same location.

FIG. 7 is a cross-sectional view of a piping material called a bare tube, where 20 is a coating such as vinyl chloride, 21 is a heat insulating material,
22 is a piping material, and when this bare tube is used in the solar collector of the present invention, piping work is greatly reduced.

Further, the complicated sealing portion of the inlet/outlet pipe explained in FIG. 3 is now in one place instead of two.

In addition, as explained in FIG.
Even when penetrating A and 4B, if the inlet and outlet pipes are in the same direction, it is easy to imagine that the processing and assembly procedure will be very simple.

As explained above, the present invention provides a heat collection plate for a solar collector in which a heat collection pipe is manufactured in one piece, in which the upper header and the outlet pipe are provided adjacently in the same direction as the inlet pipe. The header extension conduit that communicates with the pipe has a pipe diameter of 15 mm or less, has three curved pipe parts or less, and the radius of curvature of the curved pipe part is 2 crn or more, so that the flow rate can be reduced to l.
1/min or more, air can be removed from the flow path of the heat collection plate, and even if the outlet pipe and the inlet pipe are installed in the same direction, air will not remain in the flow path of the heat collection plate. , there will be no drawbacks such as high flow resistance.

Therefore, it is possible to provide a solar collector plate with high practical value that can facilitate piping work and the assembly process of the collector.

[Brief explanation of drawings]

Figure 1 is a perspective sectional view to explain the solar collector, Figure 2
The figure shows the water tube pattern of a conventional integrated heat collector plate, Figure 3 is a cross-sectional view of the sealing part of the inlet and outlet pipes that penetrate the box, and Figure 4 is a schematic perspective view of a conventional solar collector. FIG. 5 is a wooden tube pattern of a heat collecting plate of an integral type product according to the present invention, FIG. 6 is an example of the use of a solar collector according to the present invention, and FIG. 7 is a cross-sectional view of a bare tube. 3... Heat collecting plate, 4A... Inlet pipe,
4B...Exit pipe, 5...Box, 6
A: Lower header, 6B: Upper header, 7: Heat collecting tube, 8: Fin section, 12: Header extension Pipeline, 13...
...Curved pipe section.

Claims (1)

[Scope of utility model registration request] It is a heat collecting plate in which heat collecting pipes are manufactured in one piece, and multiple heat collecting thin pipes are connected by upper and lower headers, the lower header is in communication with the inlet pipe, and the upper header has an appropriate curvature. In a heat collecting plate for a solar heating device, the header is connected to a header extension conduit which is bent at a radius and passes through the side of the heat collecting thin tube and communicates with an outlet pipe provided adjacently in the same direction as the inlet pipe. A heat collection plate for a solar collector, characterized in that the extension pipe has a pipe diameter of 15 mm or less, and has three or less curved pipe parts, and the radius of curvature of the curved pipe part is 2 cm or more.