a solar collector

Abstract

The present invention proposes a solar heat collector, the heat collector adopts a straight-through heat collecting tube as a basic component, and a special joint with a shaft shoulder and a shaft hole is arranged between the metal inner tube and the water flow channel of the heat collector. . For one or more sets of vacuum heat collecting tubes arranged side by side, the special joint can form the inlet and outlet water flow channels of the heat collector in a split type. On the basis of pressure bearing and high heat collection efficiency, the present invention uses a special joint to connect the heat collector pipes in separate parts, which better solves the stress change and axial heat loss of the existing pressure-bearing solar heat collector due to temperature changes. The problem of deformation, and realize the simplification of collector production, storage, packaging and transportation, installation, repair and maintenance, save labor and time, reduce product cost and prolong the service life of collector; it will be more conducive to bearing Popularization and application of pressure solar water heaters.

Description

technical field [0001] The invention relates to solar water heater technology, in particular to a heat collector of the solar water heater. Background technique [0002] Solar water heaters are widely used because of taking clean and inexhaustible solar energy. In order to improve the thermal efficiency and suitability of solar water heaters, various researches have been done on solar collectors. So far, solar collectors can be classified into two categories: non-pressure-bearing and pressure-bearing according to the pressure. The difference between the pressure-bearing type and the non-pressure-bearing type is that the latter does not need to consider issues such as the height difference between the installation position of the solar collector and the water tank and the water outlet. Since the pressurized solar water heater is an integral closed-circuit self-circulation system, the outlet water pressure and flow are stable, and it is more suitable for people's application...

AI Technical Summary

Problems solved by technology

However, due to the large difference in the coefficient of linear expansion between the metal inner tube and the glass outer tube, and the integral connection between the two adjacent ends of the metal inner tube is welded with a connecting pipe, the existing structure cannot eliminate the The stress changes brought about by this method cannot solve the technical problems such as the axial deformation of the connecting pipeline; and because most of the metal inner tubes are welded with heat-absorbing fins on the outer wall, and the plane formed by the heat-absorbing fins needs to be in line with the sun’s rays during installation. At the same time, because the pipe connection of the metal inner pipe of the heat collector is integrally connected, there are still problems in storage, packaging, transportation, installation, and maintenance. many inconveniences

In summary, the various pressurized solar water heaters of the prior art cannot be properly solved due to the above-mentioned problems, which is not conducive to its popularization and application.

So far, most of the non-pressurized solar water heaters are still on the market; the commercialization of pressurized solar water heaters is relatively low

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