Water feeding and draining pipeline thermostat for solar water heater

Abstract

The invention discloses a water feeding and draining pipeline thermostat for a solar water heater. The water feeding and draining pipeline thermostat comprises a contactor, an indicating lamp, a relay, a temperature sensor and an electric tracing band, wherein the temperature sensor and the relay are connected in series and then are connected into a power supply; the contactor and the electric tracing band are connected in series and then are connected into the power supply; the indicating lamp and the electric tracing band are connected in parallel and then are connected into the power supply; the relay is a solid state relay; the temperature sensor is a WDF20-L type temperature sensor, and the adjustable temperature range of the temperature sensor is 0 to 5DEG C, i.e. the temperature sensor is closed at 0DEG C and opened at 5DEG C. According to the water feeding and draining pipeline thermostat disclosed by the invention, the on-off of the solid state relay is controlled by using a temperature-sensitive element, so that intermittent working of the electric tracing band is realized, and further the aims of high safety, power conservation and prolonging of the service life of the electric tracing band are achieved.

Description

technical field [0001] The invention relates to the technical field of solar energy, in particular to a thermostat for upper and lower water pipes of a solar water heater. Background technique [0002] Solar water heater products are more and more favored by consumers because of their green, energy-saving, environmental protection and safety features. However, due to the relatively cold winter in the alpine regions of northern my country, the lowest temperature even reaches below -20°C. This restricts people's use of solar water heaters in winter in this area. The invention of the temperature controller for the upper and lower water pipes of solar water heaters has filled the gap in this field in China. At present, antifreeze measures for solar water heaters in the alpine areas of the northern region 1. Although this measure of pipe emptying can prevent freezing, the emptying device is very complicated and brings a lot of trouble to the user's operation. 2. Thermal insula...

AI Technical Summary

Problems solved by technology

But the power supply of the heating cable will never be cut off, so it brings a lot of trouble to the user

(1) Power consumption, and even some users forget to turn off the power in summer, resulting in perennial power supply, which brings economic burden to users

(2) Long-term electrification will easily fatigue the heating cable and reduce the service life of the heating cable

(3) Since most of the pipe insulation materials are flammable, long-term electrification is prone to fire

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