Automatic water-filling and pressure-bearing solar water heater and water-filling control method thereof

Abstract

The invention relates to an automatic water-filling and pressure-bearing solar water heater and a water-filling control method thereof, and belongs to the technical field of household appliances. The water heater comprises a water tank, a heat collecting header, a circulation pipeline and a control circuit, wherein the water tank and the heat collecting header are respectively provided with a first temperature sensor and a second temperature sensor; a liquid level sensor is arranged at a preset position of the water tank; a signal output end of the control circuit controls switch-on and switch-off of a controlled end of an actuator; the control circuit acquires a water temperature value of the water tank at regular time and automatically supplements a heat exchange medium at proper time by intelligent control, so that phenomenon that a vacuum tube is exploded because of large temperature change is completely avoided, a system runs safely and reliably, and the water tank is protected.

Description

technical field [0001] The invention relates to a solar water heater, in particular to an automatic fluid replenishment pressure solar water heater and a water replenishment control method thereof, belonging to the technical field of solar energy utilization. Background technique [0002] According to the applicant's understanding, the existing pressurized solar water heaters can be divided into: [0003] 1. Forced circulation type: the heat exchange medium is forced to circulate between the heat collector and the hot water storage tank by means of a circulation pump. The advantage is that the hot water storage tank can be located at any position, and the installation is relatively beautiful. The disadvantage is: the system is complex and costly. Since the heat collection system is a pressure-bearing closed type, the heat exchange medium needs to be replenished regularly after the system has been in operation for 2-3 years; [0004] 2. Natural circulation type: The system ...

AI Technical Summary

Problems solved by technology

The disadvantage is: the system is complex and costly. Since the heat collection system is a pressure-bearing closed type, the heat exchange medium needs to be replenished regularly after the system has been in operation for 2-3 years;

The disadvantage is: since the heat collection system is a pressure-bearing closed type, the heat exchange medium needs to be replenished regularly after the system runs for 2-3 years. Since the heat collector is a closed type, the system cost is still high

However, due to the low temperature of replenishing water, it is easy to cause the glassy heat collecting tube to burst (commonly known as fried tube)

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