電動汽車二次回路熱泵空調系統制冷劑充注量研究

章偉　李康　周萍

摘 要：新能源汽車熱泵空調技術近些年得到了迅速的發展，系統優化也引起了廣泛的重視。傳統的充注量測定實驗周期長且浪費資源，應用充注量理論模型可以較為合理得計算出臨界充注量，加速系統性能的研究和產品開發。本文針對某電動汽車用二次回路熱泵空調系統進行了實驗和理論的充注量研究。結果表明，實驗臺架得出系統的臨界充注量，與Hughmark模型得出的理論計算結果最接近，制冷模式比制熱模式的理論計算結果更為準確。

關鍵詞：熱泵空調 充注量 理論模型

Research on Refrigerant Charge of Electric Vehicle Secondary Circuit Heat Pump Air Conditioning System

Zhang Wei Li Kang Zhou Ping

Abstract：Heat pump air conditioning technology for new energy vehicles has been rapidly developed in recent years， and system optimization has also attracted widespread attention. The traditional charging amount determination experiment has a long period and wastes resources. The application of the charging amount theoretical model can calculate the critical charging amount reasonably and accelerate the research of system performance and product development. In this paper， an experimental and theoretical charge volume study is carried out for a secondary loop heat pump air conditioning system for an electric vehicle. The results show that the critical charge amount of the system obtained by the experimental bench is the closest to the theoretical calculation result obtained by the Hughmark model， and the theoretical calculation result of the cooling mode is more accurate than that of the heating mode.

Key words：heat pump air conditioner， charge amount， theoretical model