JPS6237086Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field The present invention relates to a solar collector using a heat pipe.

(b) Prior Art A conventional solar collector of this type will be explained with reference to FIG.

Reference numeral 1 denotes a heat pipe bent into a U-shape, to which a heat collecting plate 2 made of aluminum or the like is attached for heat transfer, thereby forming a heat absorbing section 3. Reference numeral 4 denotes a heat dissipation cylinder serving as a heat dissipation section of the heat pipe, and is placed at a position higher than the installation surface of the heat collecting plate 2 and perpendicular to the pipe of the heat absorption section 3.
Reference numeral 5 denotes a connecting pipe that connects both ends of the heat absorbing section 3 to both ends of the heat radiating tube 4, which is constructed by extending the pipe of the heat absorbing section 3, and the inside of the heat absorbing section 3, connecting tube 5, and heat radiating tube 4 are in communication The interior is depressurized and a working fluid such as water or fluorocarbon is filled in. Reference numeral 6 denotes a liquid pipe that extends through the heat radiation tube 4 in a meandering manner, and both ends thereof protrude from the heat radiation tube 4.

When heated by sunlight in the heat absorbing section 3, the working fluid of the heat pipe evaporates and is introduced into the heat sink 4 through the connecting pipe 5. Since a heat medium such as water flows through the liquid pipe 6 extending through the heat radiation tube 4, the working fluid releases latent heat to the heat medium and is liquefied. Then, the solar heat energy is transmitted to the heat medium by falling through the communication pipe 5, reaching the heat radiating section 3, and being heated by sunlight again.

By the way, in the solar heat collector described above, in order to increase the amount of heat collected per unit heat collecting area, the heat transfer area of the liquid pipe 6 in the heat dissipation tube 4 is made large enough to increase the amount of heat exchange per unit time. It is necessary to keep the surface temperature of the heat collecting plate 2 low in this way. However, it is necessary to attach as many heat dissipation tubes 4 as there are heat pipes 1 to one liquid pipe 6, and the axial length L of the heat dissipation tubes 4 is limited. It was necessary to make the liquid pipe 6 into a meandering shape to remove it. For this reason, the shape of the heat dissipating portion of the heat pipe 1 becomes complicated, resulting in an increase in the pressure loss of the liquid tube 6 within the heat dissipation cylinder 4, and a drawback that it becomes difficult to drain liquid from the liquid tube 6.

(c) Purpose of the invention The purpose of this invention is to increase the heat transfer area of the heat dissipation section of a heat pipe without complicating its shape.

(d) Structure of the device In this device, liquid tubes with heat dissipating tubes of heat pipes attached coaxially are arranged in two rows, and the heat absorbing parts of the plurality of heat pipes are arranged on the same plane. It is characterized in that the heat absorption part of the pipe is connected to the heat radiation tube of the two rows of liquid pipes.

(E) Embodiment Figure 2 is an embodiment of the present invention. The difference from that in Figure 1 is that liquid pipes 6 with heat sinks 4 coaxially attached are arranged in two rows in the front and back direction. row of liquid pipes 6
Two heat absorbing parts 3 of U-shaped heat pipes 1 are arranged adjacent to each other in the left and right direction on the same plane on one side, and are integrated by the same heat collecting plate 2, and the heat absorbing parts 3, 3
The ends of the heat sinks 4, 4 are connected to the connecting pipes 5, 5, respectively.
The liquid pipe 6 in one of the heat dissipation cylinders 4 can be used as the outgoing path of the heat medium, and the liquid pipe 6 in the other heat dissipation cylinder 4 can be used as the return path.

With this configuration, the heat dissipation tube 4 of the heat pipe 1 can be divided into two liquid pipes 6 and attached, so that the restriction on the length of the heat dissipation tube 4 in the axial direction is significantly relaxed.

Therefore, the heat radiation tube 4 can be selected to have a required length, and even if the liquid tube 6 is a blank tube, a sufficient transfer area within the heat radiation tube 4 can be ensured. Therefore, the heat dissipation part of the heat pipe 1 can be made into a compact shape, and there is no problem of increasing pressure loss in the liquid pipe 6 or difficulty in draining liquid as in the conventional case.

FIG. 3 shows a combination of the above-mentioned units 8, 8, etc., in which the liquid pipes 6 of each unit 8 are connected by a joint 7, and the ends of the liquid pipes 6, 6 are connected by a U-shaped pipe 9. be.

In this way, you can increase or decrease the number of units to obtain the required heat collection temperature and amount, and
The outward and return paths of the liquid pipes 6 are combined into one location, and the external piping of the heat collector can also be made compact.

(f) Effects of the invention Since the present invention is constructed as described above, the heat dissipation cylinders of the heat pipe are distributed and attached to two rows of liquid pipes, and the heat transfer area of the heat radiation part is extended in the axial direction of the liquid pipes. This can be made larger. Therefore, in order to increase the amount of heat collected per unit area, the heat dissipation part can be made compact without complicating the shape, and the pressure loss in the liquid pipes is reduced, making it easier to drain the liquid. There is.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional solar collector, FIG. 2 is a perspective view of an embodiment of this invention, and FIG. 3 is a piping connection diagram of the unit shown in FIG. 1... heat pipe, 3... heat absorption section, 4... heat radiation cylinder, 6... liquid pipe.

Claims (1)

[Claims for Utility Model Registration] (1) Liquid tubes with heat dissipation tubes of heat pipes attached coaxially are arranged in two rows, and the heat absorption parts of a plurality of heat pipes are arranged on the same plane, A solar heat collector in which the heat absorbing part of the heat pipe is connected to the heat dissipating tube of the two rows of liquid tubes. (2) Two rows of liquid pipes, one for the outbound route and the other for the return route,
The solar collector according to claim 1, which is connected at one end with a U-shaped pipe.