基于多热源辅助的新型空气源热泵除霜方法研究
Novel defrosting method for air-source heat pump with multi-assisted heat sources
摘要：
由于现阶段常见的除霜方法存在除霜热源单一、部分方法结构复杂等问题，提出了多热源辅助（MHSA）除霜法。该方法基于热气旁通法和蓄热除霜法的原理，利用系统在谷电期的制热和太阳能等多种热源进行蓄热，并利用储存的热量加热压缩机吸气，以达到多热源辅助除霜的效果。建立了蒸发器、压缩机、冷凝器、节流阀和蓄热装置的数学模型，对MHSA除霜法进行了模拟分析，并与传统的热气旁通除霜法进行了比较。结果表明，MHSA除霜法除霜速度提高，同时盘管壁温回升速度也提高。
Abstract：
For the problems of defrosting methods with single heat source and complex structure, develops a new defrosting method, called multi-heat-source assisted (MHSA) defrosting method. The method is based on the principle of hot vapor bypass method and heat storage method. The heat storage device accumulates the heat from various heat sources such as the heat produced by system in valley period of electricity and the solar energy, and then the stored heat is used to heat the suction vapor of compressor, which achieves the effect of MHSA defrosting. Establishes the mathematical models of evaporator, compressor, condenser, throttle and regenerator, develops the MHSA defrosting model for simulation, and compares the simulation results with those of the hot vapor bypass method. The results show that the defrosting speed of the MHSA defrosting method is higher than that of the hot vapor bypass method. Meanwhile, the wall temperature rise of the coil also accelerates.
Keywords:air-source heat pump, multi-heat-source assisted defrosting, hot vapor bypass method, quality of frost layer, wall temperature of coil