Novel anti-scaling electric heating pipe and water heater

Abstract

The invention discloses a novel anti-scaling electric heating pipe and a water heater. A temperature-sensitive expansion wire is additionally arranged on an electric heating pipe; two ends of the temperature-sensitive expansion wire are fixed separately; and the temperature-sensitive expansion wire is fixed on the electric heating pipe or a mounting seat at one end of the electric heating pipe; the heat-sensitive expansion wire is spirally wound around the outer wall of the electric heating pipe; gaps are left between screw threads formed by the temperature-sensitive expansion wire; and the spacing of the gaps change with the deformation of the temperature-sensitive expansion wire. The temperature-sensitive expansion wire of the novel scale-inhibiting electric heating pipe of the present invention deforms with temperature, so that the gaps formed by the spirals can be gradually closed; scales are adhered to the temperature-sensitive expansion wire; and the temperature-sensitive expansion wire expands when being heat and contracted being cooled, so that the scales can fall off; the screw threads will move during the deformation of the temperature-sensitive expansion wire, and scratch the surface of the electric heating pipe; and therefore, a double anti-scaling effect can be realized. The temperature-sensitive expansion wire servers as a heat transfer medium, and therefore, a contact area between the electric heating pipe and water is indirectly increased, heating speed is improved, and energy can be saved.

Description

technical field [0001] The invention belongs to the field of electric heating water heaters, and in particular relates to a novel scale-suppressing electric heating tube and a water heater. Background technique [0002] There are a lot of calcium ions and magnesium ions in the water. After the water is boiled, part of the water will evaporate, and the calcium and magnesium ions will undergo a chemical reaction. The calcium sulfate gypsum that is not easy to dissolve is the precipitation of calcium sulfate containing crystal water. The original dissolved carbonic acid Calcium hydrogen and magnesium bicarbonate decompose in boiling water, release carbon dioxide, and become insoluble calcium carbonate and magnesium carbonate, which also precipitate, and what precipitates is scale. [0003] In the application of electric water heaters, due to the formation of scale, it will adhere to the electric heating tube and accumulate to form a scale layer. However, the thermal conductivit...

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Problems solved by technology

However, this structure has the problem that the scale cannot be completely cleaned. The temperature-sensitive memory telescopic structure can only reach the other end of the electric heating tube in the later stage of heating, but in the process of gradually heating the water, the scale has already attached to this end, and its The attached thickness is much thicker than the installation end of the temperature-sensing memory telescopic structure, and the scale gradually thickens from the installation end of the temperature-sensing memory telescopic structure to the other end. For the temperature-sensing memory telescopic structure, the deformation process does not The purpose of descaling the entire electric heating tube cannot be completed, and the heat transfer at both ends of the electric heating tube is quite different, which wastes electric energy. Furthermore, since the expansion and contraction is reflected in the linear shape, other shapes will affect the scope of its expansion and contraction. The structure cannot be applied to U-shaped or special-shaped electric heating tubes, which has great limitations

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