Pipeline frost crack preventing device for solar water heater

Abstract

The invention discloses a pipeline frost crack preventing device for a solar water heater. The device comprises an antifreeze liquid conveying pipeline, an antifreeze liquid returning pipeline, a controller, a parameter setting unit, a power supply module, an electromagnetic control valve I and an electromagnetic control valve II, wherein the antifreeze liquid conveying pipeline is used for conveying antifreeze liquid into a water conveying pipeline; the antifreeze liquid returning pipeline is connected with the water conveying pipeline; the parameter setting unit is connected with the controller; the power supply module is used for supplying power to each power consuming unit; the electromagnetic control valve I and the electromagnetic control valve II are arranged at the upper end port and the lower end part of the water conveying pipeline respectively; an electromagnetic control valve III and a conveying pump are arranged on the antifreeze liquid conveying pipeline; an electromagnetic control valve IV is arranged on the antifreeze liquid returning pipeline; and the electromagnetic control valve I, the electromagnetic control valve II, the electromagnetic control valve III, the conveying pump and the electromagnetic control valve IV are controlled by the controller and connected with the controller. The pipeline frost crack preventing device for the solar water heater has a rational design, a good using effect, a high intellectualization degree and low energy consumption, is easy and convenient to operate and can easily and conveniently solve the problem of frost cracking of the water conveying pipeline in the process of using the solar water heater.

Description

technical field [0001] The invention belongs to the technical field of application of solar water heaters, and in particular relates to a pipeline antifreeze cracking device for solar water heaters. Background technique [0002] The working principle of solar water heaters is to collect the heat emitted by sunlight through vacuum tubes and use the collected heat to heat water. Therefore, vacuum tubes are the key components of solar water heaters. Since the vacuum tubes are black tubes, they are conducive to absorbing the radiant heat of sunlight. At the same time, due to The vacuum tube is double-layered and vacuumed, so that the heat is not easily dissipated to the outside. Solar energy is radiant energy. The inner surface of the vacuum tube is coated with a radiation-absorbing coating and there is metal (copper) with good heat transfer effect in the tube to transfer to the water tank through heat conduction. sheet"), warming the cold water by heat exchange and exchanging ...

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Problems solved by technology

[0003] However, when used in seasons with low temperatures such as cloudy, rainy, and snowy days, there is often a practical problem that the vacuum tube solar water heater cannot be used normally due to the freezing of water stored in the water pipeline and the stored water in the water tank.

Nowadays, an auxiliary electric heating device is usually installed in the water tank, but there are still two practical problems: first, the freezing problem in the water pipeline cannot be quickly solved; second, the energy consumption increases, and the auxiliary electric heating The energy consumption of the device is not lower than that of using an electric water heater

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