JPS6027312Y2 - solar heat collector - Google Patents

Description

[Detailed description of the invention] This invention is a heat exchanger that heats a heat transfer liquid such as water by enclosing a working fluid that changes into two phases, gas and liquid, and using the latent heat when the working fluid returns from gas to liquid. This article relates to solar heat collectors using transport pipes.

As shown in Figs. 1 and 2, the conventional structure of a heat collector consists of a transparent glass tube 2 whose opening at one end is sealed with an end plate 1, and a heat transport tube 3 in which a working fluid is sealed, coaxially disposed. The heat supply part 3a of the heat transport pipe 3 is provided protruding from the end plate 1, and inserted into a plurality of heat exchange pipes 5 branched from the heat medium pipe 4, and the heat exchange pipe is sealed by a sealing ring 5'. 5 and seal the opening of the heat medium pipe 4.
, the heat exchange pipe 5 is housed in a support case 6 and completed.

A plurality of such heat collectors are arranged in parallel at the installation location, and the heat medium pipes 4 protruding from the holding case 6 are connected to each other at a joint.

However, the heat medium pipe 4 expands and contracts due to the heat of the heat medium flowing inside.

However, when a large number of conventional heat collectors are connected, the amount of expansion and contraction is equal to the amount of expansion and contraction of the heat medium tube of one heat collector multiplied by the number of connected units, resulting in a considerable amount of expansion and contraction, and the distortion is caused by the distortion of the transparent glass 2. There was a risk that it would be destroyed by being applied to it.

The present invention was devised in view of this point, and will be explained below based on the embodiments shown in Figs. A transparent tube 9 is a copper heat transport tube installed coaxially within the transparent tube 7, and a working fluid that changes into two phases of gas and liquid is sealed inside, and the heat supply part 9a is passed through the end plate 8. It protrudes to the outside.

10 is a copper or aluminum heat collecting plate thermally attached to the heat receiving part 9b of the heat transport tube 9 located inside the transparent tube 7; 11 is a heat radiation fin thermally attached to the heat supplying part 9a; 12 is a heat ring located inward from the heat dissipation fins.

The sealing plate 13 attached to the feed pipe 9 is a heat medium tube that serves as a heat medium path through which a heat medium liquid such as water passes, and is configured in a zigzag shape by combining a U-shaped tube 13a and a ■-shaped tube 13b. Furthermore, I-shaped tube 1 at both ends
A cap nut 14 and a threaded portion 15 are provided at the end of 3b.

Then, the supply part 9a of the heat transport tube 9 is inserted from the open end of the U-shaped tube 13a, and the heat radiation fin 11 portion is housed in the U-shaped tube 13a, and the outer peripheral edge of the sealing plate 12 is attached to the U-shaped tube 13a. By brazing, the opening of the U-shaped tube 13a is sealed and the heat transport tube 9 is fixed to the U-shaped tube.

Reference numeral 16 denotes a support case in which the heat medium tube 13 portion is housed via a heat insulating material, in which the vacuum tube 7 portion protrudes outside the case 16, and the cap nut 14 and threaded portion 15 are exposed through the mounting opening.

The heat collector of the present invention is as described above, and a plurality of heat collectors are arranged in parallel at the installation location, and the cap nuts 14 provided on the heat medium pipes 13 are connected to the screws of the heat medium pipes of adjacent heat collectors. The connection is made by screwing into the portion 15.

Next, the operation will be described. The heat collecting plate 10 is heated by sunlight transmitted through the transparent tube 7, and the working fluid in the heat transport tube 9 is boiled.

The boiled steam is transferred to the heat supply section 9a and is condensed by releasing latent heat into a heat medium liquid such as water in the U-shaped tube 13a.

The liquefied working fluid flows down to the liquid receiving portion 9b by the action of gravity, where it is again heated and boiled by sunlight.

As described above, in the present invention, the heat medium tube is formed in a zigzag shape by combining a U-shaped tube and a single-shaped tube, so that even if the heat medium tube expands and contracts due to heat, the opposite part of the U-shaped tube will remain as shown by the arrow in Figure 4. can absorb the expansion and contraction, so when many heat collectors are connected in series, the accumulated expansion and contraction is not concentrated in one place, but can be absorbed by each individual U-shaped tube, which eliminates the distortion caused by conventional transparent tubes. Destruction can be prevented.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional solar heat collector, Fig. 2 is an enlarged perspective view of the same main part, Fig. 3 is an enlarged perspective view of the main part of the solar heat collector of the present invention, and Fig. 4 is a main part of the same. FIG. 9...Heat transport pipe, 13...Heat medium pipe, 1
3a...U-shaped tube, 13b...1-shaped tube.

Claims (1)

[Scope of utility model registration request] The heat medium is configured in a zigzag shape by combining a U-shaped tube and a single-shaped tube, and the heat supply part of the heat transport tube is inserted from the open end of the U-shaped tube, and a sealing plate is provided on the heat transfer tube. A solar heat collector made by sealing the opening of a U-shaped tube.