Solar water heater achieving functions of automatic pressure control and heat preservation

Abstract

The invention discloses a solar water heater achieving the functions of automatic pressure control and heat preservation. The solar water heater comprises a water tank inner container and an exhaust hole. The exhaust hole is provided with a pressure control and heat preservation valve. A seal ring is fixed between the exhaust hole and the pressure control and heat preservation valve. The pressure control and heat preservation valve comprises an outer pipe and an inner pipe. The inner pipe is located in the outer pipe. The upper portion of the inner pipe is provided with an upper reinforcing rib connected with the upper portion of the outer pipe. The bottom of the inner pipe is provided with a lower interlayer reinforcing rib connected with the bottom of the outer pipe. The wall of the top of the inner pipe is provided with an air inlet. The bottom of the inner portion of the inner pipe is provided with a lower inner pipe reinforcing rib connected with a fixing hole of an air inlet seal ring. The top end of the outer pipe is sealed through an air outlet seal ring. The air outlet seal ring is arranged on the inner pipe in a sleeving mode. The bottom end of the inner pipe is sealed through the air inlet seal ring. The air inlet seal ring is provided with a fixing rod. The fixing rod is arranged in the fixing hole. The solar water heater has the good effects of efficient heat preservation and ultralow heat loss.

Description

technical field [0001] The invention relates to the technical field of solar energy, in particular to an automatic pressure control and heat preservation type solar water heater. Background technique [0002] Two important performance indicators of solar water heaters are the daily heat gain and average heat loss factor of the hot water storage tank. The daily heat gain reflects the heat absorption and heat storage performance of the solar water heater during the lighting time, and the average heat loss factor. It reflects the thermal insulation performance of the solar water heater in the time of no light. The two parameters together determine the performance of solar water heater products. [0003] Because of the product structure and function, the general solar water heater reserves a vent hole in the upper part of the hot water storage tank, which can make the water tank and the atmosphere unblocked when the water tank is in use, and ensure the stable pressu...

AI Technical Summary

Problems solved by technology

However, since the exhaust hole is always open, when the solar water heater absorbs heat during the day, as the water temperature in the tank rises, a large amount of heat will be discharged from the exhaust port, which affects the heat absorption performance of the solar water heater during the day to a certain extent ( During the day when there is no light, the solar water heater is in the heat preservation stage, and there is no heat input, and after a day of heating, the water temperature in the hot water storage tank is very high, which is different from the low temperature The external surrounding environment forms a large temperature gradient, which will cause a large amount of heat to be lost, which will seriously affect the average heat loss factor of the solar water heater during the dark time.

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