JPS6345644Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a solar heat collector with an antifreeze function, and particularly to the configuration of a flow resistance body provided in a header pipe.

<Prior art> Solar energy is rare, and in order to supply hot water and even air conditioning with this solar energy, it is necessary to install a large number of solar heat collectors.
Recently, there have been many cases in which a large number of heat collectors have been installed to provide hot water supply, air conditioning, and heating within a building.

Conventionally, when a large number of solar heat collectors, for example, several tens of solar heat collectors, are installed in parallel vertically and horizontally, as shown in FIG. One solar collector group 2 connected in series with
forming a lateral solar heat collector group 2 to an outgoing pipe 3
The hot water discharged from the heat collector group 2 was connected in parallel with a collector pipe 4a for water supply to the heat collectors branched from the collector group 2, and the hot water discharged from the collector group 2 was connected in parallel with a collector pipe 4b for recovery. In other words, the horizontally adjacent heat collector group 2 is connected to a water supply collecting pipe 4a branched from the outgoing pipe 3.
and a recovery collecting pipe 4b branched from the return pipe 5 and connected by two collecting pipes.

This is because, in winter, if the outside temperature drops extremely, the remaining water in the water passages inside the heat collector 1 will freeze, and this freezing will allow solar radiation to reach the state where heat can be collected. Since heat collection cannot be performed, water in the water flow path of the heat collector 1 must be collected into a heat storage tank (not shown) or the like when heat is not collected. When several heat collectors are installed, it is necessary to drain water from the heat collector by installing two collecting pipes 4a and 4b. In other words, collecting pipe 4
Unless pipes a and 4b were installed, water could not be drained smoothly from the heat collector group 2.

However, when a large number of solar heat collectors 1 are arranged vertically and horizontally, two collecting pipes 4a connecting the horizontal collector group 2 with the vertically adjacent collector group 2,
If piping 4b is installed, the piping work will be very complicated, and the space A where the collecting pipes 4a and 4b are installed will become a dead space that does not contribute to heat collection. It was a disadvantage.

<Purpose> The present invention has been developed in view of the above points, and by providing a solar heat collector with a new structure, a solar heat collector in which a large number of the heat collectors are arranged vertically and horizontally can be realized. The aim is to reduce dead space that does not contribute to heat collection as much as possible, increase the heat collection area of solar heat collectors installed in limited spaces, and simplify piping work, especially by improving flow resistance elements. It measures the

<Example> Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a front view of the embodiment of the present invention, FIG. 3 is a side view thereof, and FIG. 4 is a perspective view thereof. In FIGS. 2 to 4, reference numeral 6 denotes a solar heat collector, and the heat collector 6 includes a large number of heat collecting elements 7, for example, seven heat collecting elements 7, and a header pipe 8 that connects each of the heat collecting elements 7. It consists of As shown in FIG. 5, the heat collecting element 7 is
A U-shaped heat collecting pipe 10 vertically positioned vertically with an upper side a and a lower side b is inserted into a transparent glass tube 9 with an open end, and the end surface of the glass tube 9 is opened with an end plate 11. It is hermetically sealed. Furthermore, the above U
A cylindrical heat collecting fin 12 whose outer peripheral surface is treated with a selective absorption film is fitted to the letter-shaped heat collecting pipe 10 so as to cover the pipe 10, and the glass tube 9
By maintaining the interior in a high vacuum state, heat radiation is suppressed and heat collection efficiency is increased.

As shown in FIG. 4 or 6, the header pipe 8 is composed of a lower header pipe 13 with both ends open and an upper header pipe 15 having an inlet end 14 connected to the lower header pipe 13. The upper header pipe 15 is located vertically above and parallel to the lower header pipe 13, and has an outlet end 16 sealed. The upper and lower header pipes 15 and 13 include the heat collecting element 7.
A plurality of connecting holes 17 for connecting the heat collecting pipes 10 of the above-mentioned heat collecting element 7 are formed in each of the connecting holes 17.
is connected to the connecting hole 17 of the upper header pipe 15,
On the other hand, the lower side b of the heat collecting pipe 10 is connected to the connecting hole 17 of the lower header pipe 13. That is, as shown in FIGS. 2 to 4, the heat collecting elements 7 are connected in a direction perpendicular to the header pipe 8, and each heat collecting element 7
A heat collecting pipe 10 is connected to connect the upper header pipe 15 and the lower header pipe 13. 1
8 is a flow resistance body provided on the discharge side of the connecting portion 19 between the lower header pipe 13 and the upper header pipe 15;
The upper side of the pipe No. 3 is closed and a small flow path 20 is formed at the lower part. This flow resistance body 18
is the connecting portion 19 of the upper and lower header pipes 15 and 13.
As shown in FIG. 7, which is a longitudinal cross-sectional view, it is a plate disposed so as to seal the lower header pipe 13, and a semicircular arc-shaped notch 21 is provided on the lower side. Flow resistance element 1 provided with this notch 21
8 to the connecting portion 19, the flow path 2
0 is formed. The flow path 20 formed by the notch 21 is formed so as to be located at the lowest part of the lower header pipe 13 when the heat collector 1 is installed with the header pipe side inclined at an angle of θ1 with respect to the horizontal plane with the header pipe side at the bottom. There is. In addition, this flow resistor 18 can be fixed by welding or the like, or by attaching it to the upper header pipe 15.
It is also conceivable to extend the end of the header to protrude into the lower header pipe 13 and use it as a flow resistance element.

Returning to FIGS. 2 to 4, the upper and lower header pipes 15, 13 and a portion of the heat collecting element 7 are covered with a header cover 22, and each heat collecting element 7 is It is fixed with a fixing fitting 23 disposed in a direction orthogonal to each other.

To explain the flow path of water in the solar heat collector 1 having the above configuration, the water flowing in from the lower header pipe 7 hits the flow resistance body 13, where most of the water flows to the upper header pipe 9 side where resistance is lower. Since the outlet end 10 of the upper header pipe 9 is sealed, the water flowing into the upper header pipe 9 flows through the heat collecting pipes 5 of the multiple heat collecting elements 2 connected in parallel to the header pipe 9. It flows into the upper side a and flows back into the lower header pipe 7 through the lower side b. The water flowing into the lower header pipe 7 is discharged from the heat collector and flows into the adjacent heat collector or return pipe.

A solar heat collecting device in which a large number of solar heat collectors described above are arranged will be explained using FIG. 8. In FIG. 8, reference numeral 6 denotes the solar heat collectors, of which a large number are arranged adjacent to each other in the horizontal direction. The lower header pipes of adjacent heat collectors 6 are connected to each other, and the connected heat collectors 6 are tilted downward by θ1 toward the front with the header cover 16 side facing downward, and are tilted toward the left side, that is, as described below. The inclination θ2 is also downwardly inclined toward the connection side of the outgoing pipe. 24 is a heat storage tank for storing hot water heated by the heat collector 6. Reference numeral 25 denotes an outgoing pipe that communicates between the heat storage tank 24 and the group of heat collectors 6, and a pump 26 and a check valve 27 are interposed in this outgoing pipe 25. 28 is a return pipe for returning the hot water discharged from the heat collector 6 group to the heat storage tank 24.
Reference numeral 29 is a drainage channel that connects the outgoing pipe 25 and the heat storage tank 24, and a drainage valve 30 is interposed in this drainage channel 29 to open the inside of the pipe to the atmosphere. 31
32 is an automatic air vent valve, and 32 is an intake valve, which are provided in pairs on both the left and right sides.

To explain the operation of the heat collector having the above configuration, in a normal state, by operating the pump 26, water in the heat storage tank 24 is sent to the heat collector 6 group through the outgoing pipe 25. The water sent to the heat collector 6 is heated in the heat collecting element, collected, and sequentially discharged to adjacent heat collectors 6, and the high-temperature water heated in the group of heat collectors 6 is returned to the return pipe 28. It returns to the heat storage tank 24 through. The water in the heat storage tank 24 is heated sequentially by the above-mentioned operation, but when the water in the heat collector 6 is likely to freeze in the winter, or in the summer, too much heat is collected and the hot water in the heat storage tank 24 boils. Sometimes it is necessary to drain the water in the heat collector 1. In this case, pump 2
6 and the drain valve 30 is opened to the atmosphere, the water in the heat collector group 6 flows backward from the header pipe through the outgoing pipe 28 to the drain channel 29, and is collected in the heat storage tank 24. can do. In other words, the flow path 20 is formed below the flow resistance body 18 provided in the lower header pipe 13, and the heat collector 6 group is arranged to be inclined so as to descend forward and to the left. As a result, all the water in the heat collector 1 can be drained without remaining. In particular, the notch 21 provided in the flow resistance body 18 (the flow path 20 formed by the notch 21) Because it is located in the central part, water can be drained from the heat collector 6 without leaving a drop.
Furthermore, since this notch has a semicircular shape, as shown in FIG.
Compared to a long and slender shape such as the crescent-shaped flow path B shown in FIG.

8 shows several solar collectors connected horizontally, but in the solar collector 1 of the embodiment of the present invention, the structure of the header pipe 8 is very simple, and since the upper and lower header pipes 15, 13 function as the conventional collector pipes connecting the collectors 6, any number of solar collectors can be connected horizontally by simply connecting the lower header pipes 13 without piping the collector pipes. Therefore, in a system in which many collectors 6 are arranged vertically and horizontally, the piping work is very simple, and since the upper and lower header pipes 15, 13 function as the conventional collector pipes, the collector pipes that were previously interposed and installed between adjacent collectors 6 in the vertical direction can be eliminated, and the dead space between the collectors can be almost completely eliminated.

In addition, in the above embodiment, the notch 21 provided in the flow resistance body 18 was shown as having a semicircular shape.
Other rounded shapes such as semi-elliptical, circular, shield-shaped, polygonal or semi-polygonal shapes may also be used.In other words, the notches do not have an elongated shape such as a slit or a crescent shape, but rather allow the solar collector to be inclined. It is acceptable as long as it is located at the lowest part of the header pipe when installed.

<Effects> According to the present invention, the solar heat collector includes a header pipe that includes a lower header pipe and an upper header pipe located above the lower header pipe,
The upper header pipe has an inlet end connected to the lower header pipe and an outlet end sealed, and a flow resistance body is provided on the discharge side of the connection part between the lower header pipe and the upper header pipe, and the upper header pipe and a lower header pipe are connected by a number of heat collection pipes, so in a heat collection device in which a large number of solar heat collectors are arranged vertically and horizontally, the upper and lower header pipes are connected in the horizontal direction as conventionally known. It serves as a collector pipe that connects adjacent heat collectors, and horizontally adjacent heat collectors can be connected by simply connecting the lower header pipes. Since it is possible to eliminate the collecting pipes that were installed between the solar heat collector and the solar heat collector, the piping of the solar heat collector can be greatly simplified and the dead space between the heat collectors can be almost eliminated. . Therefore, when installed in a limited space, the heat collection area can be increased and the cost of the device can be reduced.

In addition, by arranging the solar heat collector at an angle, water can be easily drained from the collector during non-operation. Since it is composed of a plate with a notch located at the lowest part of the header pipe, all the water in the heat collector can be drained out through this notch when draining water, without leaving a single drop. Therefore,
Even when the outside temperature drops during the winter, heat can be collected without freezing.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional solar collector, FIG. 2 is a top view of an embodiment of the present invention, and FIG. 3 is a side view of the same.
Fig. 4 is a perspective view of the same, Fig. 5 is a cross-sectional view of the heat collecting element used in the embodiment of the present invention, Fig. 6 is a side view of the header pipe used in the embodiment of the present invention, Fig. 7 is a cross-sectional view of the connection part of the upper and lower header pipes, Fig. 8 is an explanatory diagram of a heat collecting device using the solar heat collector of the present invention, Fig. 9 and Fig. 10 are explanatory diagrams for comparison with the embodiment of the present invention. 6: solar heat collector, 7: heat collecting element, 8: header pipe, 10: heat collecting pipe, 13: lower header pipe, 15: upper header pipe, 16: outlet end, 1
8: flow resistor, 19: connecting portion, 20: flow passage,
21: Cutout.

Claims (1)

[Claims for Utility Model Registration] The header pipe is composed of a lower header pipe and an upper header pipe located above the lower header pipe, and the upper header pipe connects an inlet end to the lower header pipe and an outlet. A solar heat collection system in which the ends are sealed, a flow resistance element is provided on the discharge side of the connection between the lower header pipe and the upper header pipe, and the upper header pipe and the lower header pipe are connected by a number of heat collection pipes. A solar heat collector, characterized in that the flow resistance body is a plate body having a notch located at the lowest part of the header pipe when the heat collector is installed obliquely.