JPH0123705B2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications The present invention relates to a solar water heater.

Conventional structure and its problems When heat pipes made of copper pipes are used in solar water heaters, usually multiple heat exchange parts of the heat pipes are inserted as bare copper tubes into the water of the hot water tank. Ru. In this type of system, the heated and stored water has a high copper ion concentration due to the elution of copper, which is the material of the heat exchanger. Corrosion typically occurs over the entire surface of so-called copper pipes. This copper ion concentration often exceeds the water standard of 1 ppm. This elution of copper ions is largely influenced by an increase in chlorine ions, sulfate ions, nitrate ions, residual chlorine, etc. contained in the water used and a decrease in hydrogen ion concentration (PH).

If water containing copper ions is repeatedly brought into contact with bathtubs, washbasins, and towels, insoluble blue substances may adhere to them. This is because copper reacts with fatty acids and ammonium contained in soap and sweat, producing fatty acid copper or ammonium salts of copper, resulting in a blue substance. This is what is commonly referred to as the "blue water" problem.

OBJECT OF THE INVENTION The purpose of the present invention is to eliminate the so-called "blue water" problem in which the above-mentioned insoluble blue substances adhere.

Structure of the Invention In order to achieve the above-mentioned object, the present invention attaches a metal with a high ionization tendency, such as magnesium, to one side of the heat exchanger via a substrate and a box-shaped container, and connects the substrate and the box-shaped container with each other. One end of a conductive fixed wire having a spring action is held between them, and the other end of the fixed wire is brought into contact with the other surface of the heat exchanger.

DESCRIPTION OF THE EMBODIMENTS In FIG. 1, reference numeral 1 denotes the main body of a solar water heater, and a heat pipe 2 in which fluorocarbon gas or the like is sealed in a copper pipe is installed inside the main body. There is a heat exchange section 4 above the heat pipe 2, which functions to transfer the amount of heat collected from the sun to the water 3b of the hot water storage tank 3. A corrosion protection unit 5 is attached to the upper surface of this heat exchange section 4. This anti-corrosion unit 5 is machined to have such a size that it can be attached and removed at will from the upper opening 3a of the hot water storage tank, ie, from the portion where the water supply ball tap 6 is attached, as shown in FIG.

The structure of this anticorrosion unit 5 will be explained with reference to FIGS. 3, 4, and 5. 5a is a magnesium ingot used as an example of a metal having a greater tendency to ionize than the heat exchange part 4. This magnesium ingot 5a is screwed and fixed by a mounting bolt 5d passing through the substrate 5c and the box-shaped container 5f which are in contact with one end of the fixing wire 5e. A silicon sealant 5b or the like is applied in advance to the contact surface between the magnesium ingot 5a and the substrate 5c.

Both left and right ends of the substrate 5c are bent to fit along the heat exchange section 4, thereby creating a fitting structure with the heat exchange section 4. In addition, a boat bottom-shaped convex portion A is provided in the heat exchange portion 4.
It makes the mounting structure stable by making it contact parallel to the
Usually, this substrate 5c is optimally made of stainless steel, copper, or a copper alloy. The fixed wire 5e is made of a conductive material such as stainless steel, and is formed into a U-shape to have spring elasticity. The other end of the fixed wire 5e is bent into an L-shape so as to be hooked onto the lower surfaces of the two heat pipe heat exchange sections 4 and brought into contact therewith. This heat pipe 2 is usually formed from a plurality of pieces, but
Two lengths are used for mounting the corrosion protection unit 5. Further, the plurality of heat pipes 2 are electrically integrated through the heat collecting portion fins 2a.

A V-shaped groove is provided on the substrate 5c, and one end of the fixed wire 5e is movably held between the lower surface of the box-shaped container 5f. In addition, box-shaped container 5f
are usually made of plastic material that is highly water and heat resistant. Further, 5i is magnesium hydroxide powder etc. eluted from the ingot 5a.

Effects of the Invention In the present invention, metals with a higher ionization tendency than copper are actively eluted, and the eluting of copper is suppressed.
The "blue water" problem will no longer arise.

Also, after long-term use or in areas with poor water quality,
Even if a relatively large amount of metal is eluted, the metal will remain in the box-shaped container and will hardly flow into the hot water supply, so the clean state of the water can be maintained.

In addition, since the mounting position of the fixing wire with spring action is movable, (1) the necessary mounting and fixing force can be adjusted depending on the size and weight of the metal. That is, if the length of _L1 in FIG. 4 is increased and the spring is pulled out toward the front, the elastic force of the spring becomes weaker, which becomes a condition suitable for mounting a light metal object.

(2) When storing the finished anti-corrosion unit of the present invention in a packaging box, press the _L1 dimension a little shorter.
If the L ₀ dimension is set at a position that is well within the overall dimension, the packaging box will be smaller in size and can be provided at a lower cost as a whole.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a solar water heater according to an embodiment of the present invention, Fig. 2 is a perspective view of the same main part, Fig. 3 is a perspective view of the corrosion protection unit, and Fig. 4 is an exploded perspective view of the main part. ,
FIG. 5 is a sectional view of the main part. 1... Main body of solar water heater, 2... Heat pipe, 2a... Heat collection fin, 3... Hot water storage tank, 3
a...Top opening, 3b...Water, 4...Heat exchange section, 5a...Ingot (metal), 5c...Substrate,
5d...Mounting bolt, 5e...Fixing wire, 5f...
Box-shaped container, 5i... Magnesium hydroxide powder, 6...
...Ball tap, A...Protrusion, B...V-shaped groove.

Claims (1)

[Claims] 1. A metal having a higher ionization tendency than the metals constituting the heat exchanger is mounted on one side of the heat exchanger made of copper or copper alloy via a substrate and a box-shaped container having an opening on the upper surface side. , one end of a conductive fixed wire having a spring action is movably held between the substrate and the box-shaped container, and the other end of this fixed wire is connected to the other surface of the heat exchanger. A solar water heater placed against the side.