JPS58214752A - Heat pipe type solar heat water heater - Google Patents

Abstract

PURPOSE:To capacitate the long term use even in an area with poor water quality and at the same time maintain the initial heat collection efficiency by a structure wherein the evaporator end and the condenser end of a heat pipe are composed of separate parts and anticorrosive treatment is applied to the outside surface of the condenser end. CONSTITUTION:The condenser end 3b and the evaporator end 3a of the heat pipe 3 are composed of separate parts and anticorrosive treatment such as plating, coating or the like is applied to the outside surface of the condenser end 3b before the joining work of both the ends 3b and 3a. And yet the joining of the condenser end 3b and the evaporator end 3a are performed by brazing at the position outside a hot water storage tank 2. In the heat pipe as mentioned above, the rays of the sun transmitted a glass body 10 boils a working liquid 15 sealed in the heat pipe so as to generate vapor. The vapor travels to the condenser end 3b of the heat pipe 3 and, at the same time, the vapor condenses there by being cooled at the condenser end 3b. By the condensation of the vapor, the heat in the vapor is heat-transferred to the water 11 in the hot water storage tank 2 in order to heat the water 11. The working liquid 15 liquefied by condensation flows down in the heat pipe 3 back to the evaporator end 3a in order to be evaporated so as to repeat the above-mentioned action.

Description

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

A conventional heat pipe type solar water heater was constructed 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 this heat pipe 3 is connected to the heat collector main body. 1 and condensed #3
b is arranged inside 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. 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. .

In this case, although the condensing part 3b of the heat pipe 3 is always immersed in water in the hot water storage tank 2, no rust prevention measures have been taken, and therefore, the condensing part 3b of the heat pipe 3 is not used for a long time or the water quality is In areas with poor conditions, corrosion occurs in the condensing section 3b of the heat pipe 3 within a relatively short period of time, causing problems such as generation of patina and eventually formation of holes in the condensing section 3b of the heat pipe 3.

In view of the above-mentioned conventional problems, an object of the present invention is to provide a heat pipe 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 its original heat collection efficiency. be.

The basic structure of the present invention to achieve the above object is that the evaporating part and the condensing part of the heat pipe are made up of separate parts, and after applying rust prevention treatment to the outer surface of the condensing part, The evaporating section and the condensing section are connected externally, and the opening at the tip of the condensing section is used for evacuation and injection of working fluid, and the opening at the tip of the condensing section is sealed with a pinch seal. be.

According to the present invention, with the above configuration, the outer surface of the condensing part of the heat pipe disposed inside the hot water storage tank is subjected to rust prevention treatment, and the evaporation part of the heat pipe is located outside the hot water storage tank. Since the condensing part of the heat pipe is connected, even if it is used in an area with poor water quality, there is no problem of corrosion of the condensing part of the heat pipe, and as a result, the original heat collection efficiency is maintained for a long period of time. will be explained based on FIGS. 2 to 5. In addition, in FIGS. 2 to 5, the same parts as those in FIG. 1 shown in the conventional example are given the same numbers. Figure 2 shows a state in which a plurality of heat pipe type solar water heaters are installed in parallel in one embodiment of the present invention.
2 is a hot water storage tank located above the heat collector body 1, 7 is a water supply port, and 8 is a hot water outlet.

FIG. 3 shows a cross-sectional view taken along the line X-X in FIG.
3 is a heat pipe, and the evaporation part 3a of this heat pipe 3
is attached to the substrate 9 inside the heat collector main body 1 which is installed at an angle. A glass body 10 that transmits sunlight is still disposed on the upper surface of the heat collector body 1. The upper part of the evaporation part 3a of the heat pipe 3 passes through the wall of the hot water storage tank 2, and the penetrating part of the bracket is sealed by a backing 5. Still, the other end of the heat pipe 3 faces into the hot water storage tank 2 as a condensing part 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 storage tank 2 with a heat insulating material 13 interposed therebetween.

Reference numeral 14 designates a plurality of heat collecting fins having an angled cross-section, and the relationship between the heat collecting fins 14 and the heat pipe 3 is such that they are perpendicular to each other, as shown in FIG. That is, the evaporated substances 3a of the plurality of heat pipes 3 are
Vertical portion 14 of a plurality of heat collecting fins 14 having a cross-sectional shape
a, and is fixed to each heat collecting fin 14 one by one. Reference numeral 15 denotes a working fluid sealed in the heat pipe 3, and the working fluid 15 is usually sealed in an amount of about 10 to 25 inches of the internal volume of each heat pipe 3.

FIG. 5 is an enlarged sectional view showing the relationship between the condensing part 3b and the evaporating part 3a of the heat pipe 3. First, the outer surface of the condensing section 3b is subjected to anti-rust treatment such as plating or painting. The condensing section 3b and the evaporating section 3a are connected to each other by brazing outside the hot water storage tank 2. In this case, even if the anti-rust coating on the outer surface of the condensing section 3b is eroded by the heating during brazing, there will be no particular adverse effect as the area around it will not come into contact with the water 11 in the hot water storage tank 2. ! , the pinch seal 16 is attached to the tip opening of the condensing section 3b by brazing in advance before the anti-rust treatment is applied to the outer surface of the condensing section 3b. Rust prevention treatment is applied to the outer surface of the pinch seal 16. In addition, the heat pipe 3 seals the lower end of the evaporating section 3a and connects the evaporating section 3a and the condensing section 3b, and then uses the pinch seal 16 to vacuum the heat pipe 3 and inject the working fluid 16. Finally, the opening at the tip of the condensing section 3b is sealed by brazing. Reference numeral 17 denotes a cap attached to the tip opening of the condensing section 3b. Any material may be used as long as it is not eroded by water, such as synthetic resin, and can maintain airtightness.

The operation in the above configuration will be explained. The sunlight transmitted through the glass body 1o boils the working fluid 15 sealed in the heat pipe to generate steam. This steam is then conveyed to the condensing section 3b of the heat pipe 3, and
By being cooled and condensed in b, heat is transferred to the water 11 in the hot water storage tank 2 and the water 11 is heated. The working fluid 16 liquefied by condensation flows down inside the heat pipe 3 and returns to the evaporator 3a, where it evaporates again and repeats the above-described operation.

As described above, according to the present invention, the evaporation section and the condensation section of the heat pipe are constructed as separate parts, and the outer surface of the condensation section is subjected to rust prevention treatment, and then the evaporation section is installed outside the hot water storage tank. This eliminates the problem of corrosion of the condensing part of the heat pipe that comes into contact with the water in the hot water storage tank even if the heat pipe is used in areas with poor water quality. The heat collection efficiency can be maintained.

[Brief explanation of the drawing]

Fig. 1 is a cutaway perspective view of a conventional P-1541 type 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, and Fig. 3 2 is a cross-sectional view taken along the line X-X in FIG. 2, FIG. 4 is a perspective view showing the relationship between heat collecting fins and heat collecting fins in the water heater, and FIG. 6 is an enlarged sectional view of the main parts of the water heater. 1... Heat collector body, 2... Hot water storage tank, 3...0... Heat pipe, 3a... O evaporation section, 3bII... Condensation section, 160... e-pinch sticker, 17... fist cap 0 Agent's name: Patent attorney Satoshi Nakao, male, and 1 other person No. 1
Figure 2

Claims (2)

[Claims] (1) A heat source in which the evaporating section of a plurality of heat pipes is disposed within the heat collector body, and the condensing section of the heat pipe is disposed within a hot water storage tank provided above the heat collector body. In the pipe-type solar water heater, the evaporating part and the condensing part of the heat pipe are constructed as separate parts, and the outer surface of the condensing part is subjected to rust prevention treatment, and then the evaporating part and the condensing part are formed outside the hot water storage tank. A heat pipe type solar water heater in which a condensing part is connected, and the opening at the tip of the condensing part is evacuated and a working fluid is injected, and the opening at the tip of the condensing part is sealed with a pinch/ru. (2) The heat pipe type solar water heater according to claim 1, wherein a cap is provided at the tip opening of the condensing section to cover the outside of the pinch seal.