Flexible plastic film solar energy hot water apparatus

Abstract

The invention relates to heating, in particular to a soft plastic film solar water heater which comprises a hot water tank, an auto-operated temperature control valve and a heat collector; and the water heater of the invention is characterized in that: the heat collector is composed of more than one soft plastic film heat collecting units which form hollow bodies with 2 layers to 3 layers of zigzag back-wound channels by hot-welding a colored line-type polyethylene with low density or polyethylene with high density or polypropylene soft plastic film with thickness of 0.2mm to 2mm; each layer of the zigzag back-wound channels is respectively provided with a water inlet and a water outlet; the water outlets of all layers of a prior soft plastic film heat collecting unit are respectively connected with water inlets of the corresponding layers of the next soft plastic film heat collecting unit by a water pipe, and the water outlet of the top layer of the last soft plastic film heat collecting unit is connected with an water inlet of the hot water tank through the auto-operated temperature control valve while the water outlets of the lowest layer and the layer next to the lowest layer are respectively connected with the water inlets of the layer next to the lowest layer and the top layer of the premier soft plastic film heat collecting unit. The soft plastic film solar water heaterof the invention solves the technical problems that the heat collector needs no frames and can be directly laid down on roofs or hung on walls to fully absorb the heat energy on the sun-kissed surfaces of buildings.

Description

Technical field: [0001] The invention belongs to heating, in particular to a solar water heating device using a soft plastic film to make a heat collector. Background technique: [0002] Use solar energy to heat cold water, improve water temperature, for the various solar water heaters needed for family daily life, obtain extensive application already in my country. Looking at these existing solar water heaters of various models, its components are basically made up of heat collectors for collecting solar energy, storage tanks for storing hot water, water pipelines and control valves. According to the structure type of the collector and the materials used, the existing solar water heaters can be divided into two categories, one is the metal plate type, which is represented by the ZL200520139669.5 flat plate solar energy collector, which is composed of two Overlapped aluminum plates die-cast serpentine coiled copper tubes, which are then placed in the frame structure of the ...

AI Technical Summary

Problems solved by technology

The metal plate solar water heater has high heat collection efficiency, no welding, no leakage, and low temperature resistance; but the disadvantage is that the heat collector itself is complicated to manufacture, and the amount of copper and aluminum is large and expensive; the whole hot water equipment still needs to be used. Machinery and instruments such as compressors, heat exchangers and computer controllers, thus increasing the cost of water heaters and complicating installation

This type of solar water heater has a simple structure, easy installation, and high heat collection efficiency, but its disadvantage is that the surface glass of the heat collector and the glass tube in it are fragile, and the replacement and maintenance costs are high.

In this way, the area and installation form of the collector are limited, and the heat energy on the sun-irradiated area of ​​the building cannot be fully utilized.

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