Antifreeze apparatus of solar water heater

Abstract

This invention relates to a solar energy water heater, especially to an anti-freezing device of a solar energy water heater used in icing regions in winter and cold regions including a central control circuit, a temperature sensor, a water level sensor, a photosensitive sensor, a switch, a water pump, an electric controlled valve and a display circuit, in which, the temperature sensor, the water level sensor, the photosensitive sensor and the switch are connected to the central control circuit via cables, the central control circuit is connected to the water pump, the electric controlled valve and the control panel.

Description

(1) Technical field [0001] The invention relates to a solar water heater, in particular to an antifreezing device for a solar water heater suitable for use in freezing regions and high cold regions in winter. (2) Background technology [0002] Existing solar water heaters, in freezing areas in winter, especially in alpine areas, when the ambient temperature is low, the solar heat collecting components and even the all-glass vacuum heat collecting tubes with vacuum insulation and heat preservation will freeze and crack, and the inner tank of the water tank will be cracked. It will freeze, expand, deform, or even burst, and the upper and lower water pipes of the water tank will freeze and block. Not only will it be frozen and cracked, but it will also be unusable during the thawing season next year, unless it is overhauled and replaced every year. And although existing split type solar water heater has avoided the situation that water tank is easy to freeze outdoors, still can...

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Problems solved by technology

[0002] Existing solar water heaters, in freezing areas in winter, especially in alpine areas, when the ambient temperature is low, the solar heat collecting components and even the all-glass vacuum heat collecting tubes with vacuum insulation and heat preservation will freeze and crack, and the inner tank of the water tank will be cracked. It will freeze, expand, deform, or even burst, and the upper and lower water pipes of the water tank will freeze and block. Not only will it be frozen and cracked, but it will also be unusable during the thawing season next year, unless it is overhauled and replaced every year.

And although the existing split solar water heater avoids the situation that the water tank is easy to freeze outdoors, it still cannot solve the problem of antifreezing of solar heat collecting components.

[0003] In addition, from the perspective of energy saving, when the general water heater is under low light or no light, the solar collector itself will generate heat loss, and after no light, the water temperature in the solar collector will drop significantly, and when the water is heated again, The starting point of the heating water temperature of the solar collector needs to be when the sunlight intensity reaches the standard, and the temperature of the stored water in the collector is used as the heating starting point. Therefore, the power consumption of electric supplementary heating in winter is greatly increased, which increases the production cost and operation of the solar water heater. cost

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