Solar regeneration system for water-soluble anti-freezing solution in frostless heat pump system

Abstract

The invention discloses a solar regeneration system for a water-soluble anti-freezing solution in a frostless heat pump system. The solar regeneration system comprises a first-stage refrigerant circulating system, a second-stage heat exchange circulating system and a third-stage regeneration circulating system, wherein the first-stage refrigerant circulating system is formed by connecting a compressor, an outdoor heat exchanger, a restricting element, an indoor heat exchanger and a gas-liquid separator into a loop; the second-stage heat exchange circulating system is formed by connecting the outdoor heat exchanger, a cooling tower and a secondary circulating solution pump into a loop; the third-stage regeneration circulating system is formed by sequentially connecting the cooling tower, a connecting pipeline or a channel and a CPC heat collector or a trench type tracking light-condensation heat collector. In order to make the water-soluble anti-freezing solution serve as a heat exchange working medium of an indirect defrosting heat pump, the third-stage circulation which utilizes solar light condensation for regeneration is arranged in addition to the first-stage circulation for indoor circulation and the second-stage circulation for outdoor heat absorption; as a result, the anti-freezing solution can be regenerated without extra energy consumption, bulk storage of the anti-freezing solution is not needed, cost is low, the heating performance of the system is not damaged but improved instead, and the comfort and energy conservation property of the heat pump are improved when the heat pump is used at a low temperature in winter.

Description

technical field [0001] This patent belongs to the field of comprehensive utilization of solar energy and heat pumps, aiming at frost-free and efficient continuous operation for areas where heat pumps are prone to frost. Background technique [0002] The thermal system captures low-grade heat energy from the natural air by consuming a certain amount of electricity, and transfers and upgrades it to high-grade heat energy that can be used for people's production and life. Therefore, the air source heat pump generates more heat energy by consuming electricity. The generated efficiency is far higher than that of the electric heating device, and its energy-saving effect is remarkable. [0003] The heat pump system can not only provide cooling for buildings in summer, but also provide heating in winter, and it is easy to install. Especially at this stage, with the rising price of energy and fuel, environmental protection makes many cities restrict the types of fuel. The use of heat...

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Problems solved by technology

However, this method involves the regeneration of antifreeze after dilution. It is reported that electric heating or large storage replacement is used. The former consumes a lot of power and violates the original intention of energy saving. The latter increases the cost too much and wastes antifreeze.

[0008] The defrosting methods mentioned above all have some insurmountable shortcomings, which limit the promotion of energy-saving heat pump heating methods in low-temperature areas

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