JPS6326678Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> Energy saving through the use of solar heat has been attracting attention since the oil crisis, and the present invention relates to a solar heat collector for use in equipment that utilizes solar heat for heating/cooling or hot water supply.

<Prior art> In solar heat utilization equipment, the solar heat used for heating/cooling and hot water supply is collected by a solar heat collector. Each water needs to be heated. To this end, it goes without saying that it is best to use air for heating for space heating and water for heating for hot water supply as the heating medium for direct solar heat collectors.

However, in conventional solar collectors, the heating medium was limited to either air or water, so in order to meet both heating and hot water needs, the efficiency of one of them had to be reduced. In other words, when water was used as the heating medium, a heat exchanger had to be installed for heating, and when air was used as the heating medium, a heat exchanger had to be installed for hot water, which reduced the efficiency of solar heat utilization.

For this reason, a method has been implemented in which two types of solar thermal collectors are installed, one for air and one for water, and used for heating and hot water respectively, but due to seasonal fluctuations in air conditioning and hot water loads, both are always used. It was not in operation, and the expensive solar collectors were not being used effectively. In particular, solar heat collectors that use air as a heating medium are currently hardly used outside of winter.

<Purpose> In order to solve the above-mentioned drawbacks, the present invention heats air and water using one type of solar heat collector.

<Example> The present invention will be explained below based on the drawings. 1st
In the figures and FIG. 2, 1 and 2 are transparent covers such as glass, 3 is an air duct bottom plate, and 4 is a box body. 5 is an air duct, 2 a transparent cover, 3
It consists of an air duct bottom plate, a box body, etc. A heat collector 6 is provided in the air duct 5. The heat collector 6 and the air duct bottom plate 3 are painted black or subjected to selective absorption treatment so as to easily absorb solar heat. The heat collector 6 includes fins 7 that absorb solar heat well and a pipe 8 through which a liquid heating medium such as water passes. Finn 7
are arranged so that there is good heat exchange with the air flowing outside them. Further, the fins 7 and the pipes 8 are joined together by, for example, soldering so as to have good heat conduction. 9 is a heat insulating material that prevents heat radiation.

The sunlight passes through the transparent covers 1 and 2,
The fins 7 of the heat collector 6, the air duct bottom plate 3, etc. are heated. Air is supplied through one header duct 10
It enters into the air duct 5 of the solar heat collector. While the air passes through the air duct 5, it is heated by the fins 7 of the heat collector 6 heated by solar heat, the air duct bottom plate 3, and the like. The heated air exits from the other header duct 11 and is used for heating the room.

Water enters through one port 12 of the pipe 8 and passes through the heat collector 6. Since the fins 7 of the heat collector 6 are heated by solar heat, the pipe 8 that is well connected to the fins 7 for heat conduction is also heated.
The water passing through the pipe 8 is also heated, and the heated water exits from the other port 13 of the pipe 8 and is used for hot water supply or the like.

As the heat collector 6 of the solar heat collector of the present invention, any shell-and-tube heat exchanger shape can be installed, but it is preferable that the tubes have fins 8. In FIGS. 1 and 2, an example is shown in which a finned pipe is used as the heat collecting section 6. The finned pipes can be arranged relatively freely; for example, if they are arranged in a staggered manner as shown in FIG. 3, heat can be efficiently collected.

Furthermore, the present invention can also be used in a condensing type as shown in FIG. In the figure, 14 is an air duct made of transparent material such as glass;
15 is a reflecting mirror for concentrating sunlight onto the air duct 14 and the heat collector 6 provided in the air duct 14. In addition, in FIG. 4, the box body 4, transparent covers 1 and 2, etc. are omitted. As in this example, by making the solar heat collector a concentrating type, it is possible to collect high-temperature heat, and by using it as a heat source for an absorption refrigerator in the summer, cooling using solar heat is also possible.

Regarding the shape of the fin 7, an example is shown in which the shape shown in FIGS. 1 to 3 is different from the shape shown in FIG.
It is preferable that the shape is such that it easily receives solar heat and easily transmits the heat to the air flowing around it, to the pipe 8 to which it is connected, and to the liquid heat medium flowing therein. The liquid heat medium is not limited to water, and antifreeze, oil, etc. may also be used.

<Effects> According to the present invention, a pipe through which a liquid heat medium flows is housed in an air duct whose at least the sunlight irradiation surface is made of a transparent material, and heat exchange fins are installed in this pipe in parallel to the air flow direction. This allows air heating and liquid heating to be performed simultaneously with one device in a very compact form.

In this case, since the pipes for distributing the liquid heat medium are housed in the air duct, the collector can be made very compact in the height direction, and since this height can be lowered, it can be installed on the roof. Since the heat collector itself is less susceptible to wind resistance, the strength of the heat collector itself and the frame on which the heat collector is installed does not have to be very strong.

In addition, since the pipe is housed in the air duct, the solar heat collected by the pipe is transferred to the air heat medium flowing through the air duct, and the heat of this liquid heat medium can be used to heat the air. is possible,
The air heating medium can be heated by solar heat and the heat of the liquid heating medium.

On the other hand, if the liquid heat medium flowing through this pipe is exposed to more sunlight than its absolute absorbed amount, it will try to release the excess into the atmosphere, but in this case, the pipe is housed in an air duct. This excess heat to be released can be recovered by the air heating medium, and the total solar heat collection efficiency can be improved.

In addition, the pipes through which this liquid heat medium flows are equipped with heat exchange fins parallel to the direction of air flow, making it possible to increase solar heat collection efficiency without increasing ventilation resistance, and to improve contact between the pipes and the circulating air. By increasing the area, the air heating by the liquid heating medium and the efficiency of transferring the extra heat to the air can be increased, and efficient solar heat collection can be performed.

[Brief explanation of drawings]

1 and 2 are solar heat collectors of the present invention, and FIG. 2 is a sectional view taken along the line AA in FIG. 1. Third
The figure is a cross-sectional view showing another embodiment of the present invention, and FIG. 4 is a cross-sectional view showing still another embodiment. 1, 2...Transparent cover, 5...Air duct, 6
... Heat collector, 7 ... Fin, 8 ... Pipe, 15
……Reflector.

Claims (1)

[Scope of claim for utility model registration] In a solar heat collector that heats an air heat medium and a liquid heat medium using solar heat, the liquid heat medium is distributed in an air duct whose at least the sunlight irradiated surface is formed of a transparent member. 1. A solar heat collector characterized by housing a pipe in which the air flows through the air, and in which heat exchange fins are provided in parallel to the direction of air flow.