Three heat source frost-free heat pump system

Abstract

The invention discloses a frostless heat pump system using three heat sources. The frostless heat pump system using the three heat sources comprises a solar heating system, an air source heat pump system and a low freezing point energy storage solution tower system. The solar heating system comprises a solar collector, a solar hot water tank, a shower water tank and two circulating water pumps. The air source heat pump system comprises a first plate heat exchanger, a second plate heat exchanger, an air cooling evaporator, a compressor, a dry filter, a throttling device, a three-way reversing valve and two check valve sets. The two check valve sets comprise the first check valve set and the second check valve set. The low freezing point energy storage solution tower system comprises a low freezing point energy storage solution tower, a water replenishing tank, a solution circulating pump and a solution water replenishing pump. The frostless heat pump system using the three heat sources has the advantages of being capable of integrating the solar heating mode, the air source heat pump mode and the energy tower heating mode, high in energy efficiency ratio, suitable for different working conditions in winter, and the like.

Description

technical field [0001] The invention relates to a heat pump system, in particular to a frost-free heat pump system utilizing three heat sources: solar energy, an air source, and a low freezing point energy storage solution tower. Background technique [0002] Today, the construction area of ​​my country's cities and towns has reached about 8.8 billion cubic meters, and the total heating energy consumption is about 153 million tons of standard coal per year, accounting for about 40% of the total energy consumption of urban buildings in my country. Consumption is a feasible way to reduce my country's overall energy consumption. [0003] The air source heat pump is a device that transfers heat energy from a low-level heat source to a high-level heat source. It uses air as a heat source to obtain low-grade heat energy from natural air, and converts it into high-grade heat energy that can be used by using electricity to provide heat to people. Provide, with its high efficiency, e...

AI Technical Summary

Problems solved by technology

However, air source heat pump system and solar thermal heating system have their own limitations while having the above advantages

The solar collector heating system is greatly affected by weather factors, and can only collect heat during the day, with limited heating time and poor stability, and cannot be used in continuous rainy weather; while air source heat pumps are used in cold northern regions and high altitudes. Frost will form on the outdoor finned tube heat exchanger during heating operation in wet and cold southern winter

The frost layer will increase the thermal resistance between the wet air and the fin surface, and increase the resistance of the air flowing through the fin tube evaporator, reducing the air flow; as the frost layer thickens, the heating performance of the heat pump system will decrease. will gradually decrease, causing the heat pump system to fail to work in severe cases

Frosting is the main factor affecting the normal heating of heat pump units in winter, which limits the popularization and application of air source heat pump systems to a certain extent

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