JPS58224268A - Heat pipe solar water heater - Google Patents

Abstract

PURPOSE:To contrive to maintain the initial heat-collecting efficiency in the titled water-heater for a long time, by preventing the condenser part of a heat pipe from being corroded if the water-heater is used in the place where the quality of water is not adequate, by performing a corrosion-preventing treatment to the outer surface of the condenser part of a heat pipe. CONSTITUTION:A plurality of heat pipes 3, having evaporator parts 3a and condenser parts 3b, are provided in a heat collector body 1, and the condenser part 3b of a heat pipe 3 is inserted into a hot-water tank 2 which is located in a position higher than the heat collector body 1. In such a solar heat water-heater of heat pipe type, the open end 3d of a condenser part 3b is previously sealed, and the outer surface of an evaporator part 3a is corrosion-treated. After that, the inside of a heat pipe 3 is vacuumized and operating liquid is injected into the pipe 3 from the lower open end 3c of an evaporator part 3a, which is sealed after being pinching-sealed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat pipe solar water heater using heat pipes.

Conventional Structure and Its Problems A conventional heat pipe type solar water heater has a structure as shown in FIG. That is, 1 is a heat collector main body, 2 is a hot water storage tank located above the heat collector main body 1, and 3 is a plurality of heat pipes, and the evaporation part 3a of the heat pipe 3 is a heat collector. The condensing section 3b is disposed within the main body 1, and the condensing section 3b is disposed within the hot water storage tank 2. Reference numeral 4 denotes a heat collecting plate pressed onto the evaporation section 3a of the heat pipe 3. Further, the heat pipe 3 is fixed to the hot water storage tank 2 by tightening screws 6 through a backing 5, thereby preventing water in the hot water storage tank 2 from leaking to the outside. There is.

In this case, the heat pipe 3 first seals the lower end opening 3C of the evaporating section 3d, and then seals the tip opening 3C of the condensing section 3b.
At step d, vacuum is drawn and hydraulic fluid is injected, and
The tip opening of the condensing part 3b was pinch-sealed and then sealed with brazing or the like. However, in the above-mentioned conventional device, although the condensing portion 3b of the heat pipe 3 is always immersed in water in the hot water storage tank 2, no rust prevention measures are taken.
Therefore, if used for a long time or in areas with poor water quality, corrosion will occur in the condensing part 3b of the heat pipe 3 in a relatively short period of time, causing patina and eventually preventing the condensing part 3b of the heat pipe 3 from becoming punctured. Even if rust treatment could be carried out, the end opening of the condensing part 3b is pinch-sealed in the final process, and then sealed with brazing or the like, so the heating of the burner during this sealing process makes it difficult to carry out the process. The anti-rust treatment would be lost, and therefore, the anti-rust treatment on the outer surface of the condensing portion 3b was meaningless.

Purpose of the Invention In view of the above-mentioned conventional problems, an object of the present invention is to provide a heat sink type solar water heater that can be used for a long period of time even in areas with poor water quality and that can maintain the original heat collection efficiency. The purpose is to

Structure of the Invention The basic structure of the present invention to achieve the above object is to seal the tip opening of the condensing section in advance, then applying rust prevention treatment to the outer surface of the condensing section, and then sealing the outer surface of the evaporating section. The heat pipe is used in a solar water heater by evacuation and injection of working fluid at the lower end opening, and after sealing the lower end opening of the evaporator with a pinch seal.

By having the above configuration, the present invention prevents the rust prevention treatment applied to the outer surface of the condensing part of the heat pipe installed in the hot water storage tank from disappearing, so that it can be used in areas with poor water quality. There is no problem of corrosion of the condensing part of the heat pipe even after use, and as a result, the original heat collection efficiency can be maintained for a long period of time.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 to 4. In addition, in FIGS. 2 to 4, the same parts as those in FIG. 1 shown in the conventional example are given the same numbers. Second
The figure shows a state in which a plurality of heat pipe type solar water heaters are installed in parallel according to an embodiment of the present invention, where 1 is a heat collector body, and 2 is a heat pipe type solar water heater located above the heat collector body 1. 7 is a water supply port, and 8 is a hot water outlet.

Figure 3 shows an x-xm cross-sectional view of Figure 2,
3 is the heat no ku eve, and the evaporation part 3 of the heat eve 3
a(d) It is attached to a substrate 9 inside the collector body 1 which is installed at an angle.A glass body 10 that transmits sunlight is disposed on the upper surface of the collector body 1. ing.

The upper part of the evaporating part 3a of the heat pipe 3 passes through the wall of the hot water storage tank 2, and this penetrating part is sealed by a screw 5. Further, the other end of the heat nozzle 3 faces into the hot water storage tank 2 as a condensing portion 3b, and is immersed in the water 11 of the hot water storage tank 2.

Reference numeral 12 denotes an outer cover disposed on the outside of the hot water tank 2 with a heat insulating material 13 interposed therebetween.

Reference numeral 14 denotes a plurality of heat collecting fins having an angled cross-section, and the relationship between the heat collecting fins 14 and the heat nozzle 3 is such that they are perpendicular to each other, as shown in FIG. That is, the evaporation q3a of the plurality of heat pipes 3 is transferred to the vertical portion 1 of the plurality of heat collecting fins 14 having an angled cross-section.
4a, and each heat collecting fin 14
Each piece is stuck together. 15 is a t'Lfc hydraulic fluid sealed in the heat pipe 3;
-5 is usually about 10 to 25 times the internal volume of each heat pipe 3.

Further, the heat pipe 3 is constructed in the following order.

That is, first, the cap 16 is fixed to the tip opening 3d of the condensing part 3b of the heat pipe 3 by brazing or the like.
The tip opening 3d is sealed, and then the outer surface of the condensing part 3b is subjected to anti-rust treatment by plating, painting, etc., and after that, the lower end opening 3C of the evaporating part 3a of the heat pipe 3 is evacuated. and injecting the hydraulic fluid 16,
The lower end opening 3C of the evaporator 3a is pinch-sealed and then sealed with a solder or the like.

By configuring the heat pipe 3 in this order, the rust prevention treatment applied to the outer surface of the condensing portion 3b will not disappear due to the heating of the burner during the sealing operation as in the conventional case. In addition, in order to improve the heat exchange efficiency with the water 11, the heat pipe outer diameter of the condensing section 3b is connected in the middle of the heat pipe 3 so that it is larger than the outer diameter of the evaporating section 3a. Of course, you can do it this way.

The operation will be explained in the above section. The glass body 10
The sunlight transmitted through t'1. is enclosed in a heat pipe.
The working fluid 15 is boiled to generate steam. This steam is then conveyed to the condensing section 3b of the heat pipe 3, and is cooled and condensed in the condensing section 3b, thereby transferring heat to the water 11 in the hot water storage tank 2 and warming the water 11.

The working fluid 15 liquefied by condensation is then transferred to the heat pipe 3.
It flows down through the interior and returns to the evaporation section 3d, where it evaporates again and becomes the above-mentioned f.
(The action is repeated.

Effect 4 of the invention As described above, according to the present invention, the 1'' part between the tips of the condensing part is sealed in advance, and then the outer surface of the condensing part is subjected to rust prevention treatment, and then the lower end opening of the evaporating part is sealed. In addition to vacuuming and injecting working fluid in the evaporator section, the lower end opening of the evaporator section is pinch-sealed and then sealed.This heat pipe is used in solar water heaters.
The rust prevention treatment applied to the outer surface of the condensing part of the Heat Purive installed inside the hot water storage tank no longer disappears due to the heating of the burner during sealing work, as was the case in the past.
the result.

Even when used in areas with poor water quality, the problem of corrosion of the condensing part of the heat pipe is eliminated, and the original heat collection efficiency can therefore be maintained over a long period of time.

[Brief explanation of the drawing]

Fig. 1 is a cutaway perspective view of a conventional heat pipe solar water heater; Fig. 2 is a perspective view showing a plurality of heat pipe solar water heaters arranged in parallel according to an embodiment of the present invention; 3 is a sectional view taken along the line X-X in FIG. 2, and FIG. 4 is a perspective view showing the relationship between the heat pipe and heat collecting fins in the water heater. 1... Heat collector body, 2... Hot water storage tank, 3... Heat pipe, 3a... Evaporation section, 3b... - Condensation section , 3C... Lower end opening, 3d... 1'' section between tips. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure

Claims (1)

[Claims] A heat pipe in which the evaporating parts of a plurality of heat pipes are arranged in a heat collector main body, and the condensing parts of the heat pipes are arranged in a hot water storage tank located on two sides of the heat collector main body. In the type solar water heater, the tip opening of the condensing section is sealed in advance, and then the outer surface of the condensing part is subjected to rust prevention treatment, and then the bottom opening of the evaporating section is evacuated and activated. A heat pipe type solar water heater using a heat pipe in which liquid is injected, the open 1'' lower end of the evaporator section is pinch-sealed, and then sealed.