Water-tank jacket medium forced circulation system of balcony wall-mounted solar water heater

Abstract

The invention relates to a water-tank jacket medium forced circulation system of a balcony wall-mounted solar water heater. The water-tank jacket medium forced circulation system comprises a heat collector, a water tank, a medium circulating pump, a medium flow meter, a medium circulating pipeline, a controller, a temperature sensor T1 and a temperature sensor T2; the controller can detect difference between medium temperature and water temperature according to the T1 and the T2 and control the circulating pump to turn on or off; the controller is provided with a PWM (pulse-width modulation) circuit, a flow indicating circuit and a medium level indicating circuit and can control output voltage by changing pulse width, and output frequency is controlled by changing of circles, so that lift and flow of the medium circulating pump can be adjusted as required, and actual flow values of the medium circulating pump can be displayed in a display screen of the controller; four probes are arranged in a jacket of the water tank, and medium level information in the jacket and collected by the probes can be displayed in the display screen of the controller.

Description

technical field [0001] The invention belongs to the technical field of solar energy application, and relates to a solar water heater circulation system, in particular to a balcony wall-mounted solar water heater water tank jacket medium forced circulation system. Background technique [0002] There are many varieties of solar water heaters. With the increasing density of urban buildings and high-rise buildings, the application of pressurized solar water heaters is increasing, especially the balcony wall-mounted pressurized solar water heaters with a water tank jacket medium forced circulation system. The flexibility of installation and the reasonable cost have gradually been recognized by the market. [0003] The existing balcony wall-mounted pressure-bearing solar water heater, the circulation pump used in the water tank jacket medium forced circulation system usually chooses a single-phase low-voltage DC brushless water pump of about 10W, its static lift is 2-3m, and the s...

AI Technical Summary

Problems solved by technology

If the conventional configuration is used, the heat in the collector will not be effectively transferred to the water tank, and the heat will be lost in multiple cycles, which will not save energy.

However, if you choose a snake-tube flat plate collector, the static head of the circulating pump needs to be 2.5m. Compared with the two, there is a big gap

[0004] On the other hand, due to installation or long-term operation, the heat transfer medium in the jacket of the water tank is missing or missing. During the system installation and commissioning and user use stages, the amount of the medium is only subjectively judged, and the system cannot display it. The actual situation of the media volume, when it is missing, there is no indication, which may cause the system to fail to work properly

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