Solar heat collecting device with automatic freezing preventing function and heat collecting and freezing preventing method

Abstract

The invention discloses solar heat collecting device with an automatic freezing preventing function and a heat collecting and freezing preventing method and belongs to the technical field of solar heat collecting devices. The solar heat collecting device comprises a water storing unit, a heat collecting plate unit, an electronic control unit and a circulating unit. The water storing unit comprisesa water input valve, a water storing tank, a water output valve and a breather pipe. The circulating unit comprises a motor and is composed of a water pump, a two-position three-way valve, a one-wayvalve and a pipeline for connecting all the parts. The heat collecting plate unit comprises a heat collecting plate and a water collecting tank. The electronic control unit comprises a controller, a pressure sensor, a heat collecting plate temperature sensor, a water tank temperature sensor and the like. No freezing preventing medium exists in the device, and the device is safe and efficient. According to the device, evacuating freezing prevention is adopted in the outdoor heat collecting plate, and the problem of freezing can be eradicated thoroughly; and the types of adopted elements and thenumber of the adopted elements are small, and a system is simple and reliable.

Description

technical field [0001] The invention relates to a solar heat collection device with an antifreeze function and an antifreeze method, belonging to the technical field of solar heat collection devices. Background technique [0002] The existing balcony split type solar heat collector is outdoors, and the water storage and control system is indoors. It is easy to install and not limited by the height of the building, and its application is becoming more and more extensive. In areas where the outdoor temperature is lower than 0°C in winter, the biggest problem facing the split solar water heating system is the antifreeze of the outdoor heat collecting plate. [0003] At present, common antifreeze hot water systems such as figure 1 shown. Antifreeze is used as the heat exchange medium. When the temperature of the antifreeze in the heat collecting plate is higher than the temperature of the water in the water storage tank, the control unit starts the water pump, and the antifree...

AI Technical Summary

Problems solved by technology

The disadvantages of this scheme are: 1. It is necessary to use antifreeze as the heat exchange medium to indirectly heat the water, one more heat exchange process, and the efficiency is low

2. Antifreeze is a toxic medium, which is volatile during use, which is harmful to health and requires maintenance and replenishment of antifreeze in daily use.

The device only realizes antifreeze for pipelines, and does not add antifreeze function for outdoor heat collectors

And the antifreeze heat comes from the absorbed solar radiation energy. If the temperature is below zero and there is no light for many days, the heat in the heat collection box will disappear, and the heat collection box and pipes will freeze.

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