闪发器型准二级压缩空气源热泵加速除霜实验
摘要：为提升闪发器型准二级压缩空气源热泵逆循环除霜性能，本文利用机组既有循环结构，在除霜期间通过打开电磁阀实现补气，加大制冷剂质量流量。实验结果表明，补气可缩短融霜时间，从而有效缩短除霜时间和降低除霜能耗，而且室外温度越低，效果越显著。在-10～2℃的实验环境中，使用补气除霜后，除霜时间缩短了23.73%～40.48%,除霜耗功量减少了17.75%～45.90%。
关键词：空气源热泵补气除霜常规除霜除霜时间除霜耗功量闪发器逆循环除霜
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参考文献[1] WEI W Z,JIN X Y,DONG Q,et al.Frosting performance variations of variable-frequency air source heat pump in different climatic regions[J].Applied thermal engineering,2023,219:119356.
[2] 王沣浩，马龙霞，王志华，等.空气源热泵除霜控制方法研究现状及展望[J].制冷学报，2021,42(5):27- 35.
[3] 叶盛辉，周超辉，程康，等.文献聚类视角下的中国热泵研究进展[J].暖通空调，2023,53(1):11- 24.
[4] ZHANG L,DONG J K,JIANG Y Q,et al.A novel defrosting method using heat energy dissipated by the compressor of an air source heat pump[J].Applied energy,2014,133:101- 111.
[5] WANG Z Y,WANG X M,DONG Z M.Defrost improvement by heat pump refrigerant charge compensating[J].Applied energy,2008,85(11):1050- 1059.
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[7] 马龙霞，刘孜璇，王沣浩，等.带储液气液分离器的空气源热泵除霜系统研究[J].制冷学报，2022,43(2):23- 32.
[8] WANG J J,QV D H,YAO Y,et al.The difference between vapor injection cycle with flash tank and intermediate heat exchanger for air source heat pump:an experimental and theoretical study[J].Energy,2021,221:119796.
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[10] 魏文哲，徐林彤，刘旭晨，等.准二级压缩空气源热泵补气加速除霜实验[J].制冷学报，2023,44 (2):47- 53,60.
[11] DONG J K,DENG S M,JIANG Y Q,et al.An experimental study on defrosting heat supplies and energy consumptions during a reverse cycle defrost operation for an air source heat pump[J].Applied thermal engineering,2012,37(5):380- 387.
[12] KANG D,JEONG J H,RYU B.Heating performance of a VRF heat pump system incorporating double vapor injection in scroll compressor[J].International journal of refrigeration,2018,96:50- 62.
[2] 王沣浩，马龙霞，王志华，等.空气源热泵除霜控制方法研究现状及展望[J].制冷学报，2021,42(5):27- 35.
[3] 叶盛辉，周超辉，程康，等.文献聚类视角下的中国热泵研究进展[J].暖通空调，2023,53(1):11- 24.
[4] ZHANG L,DONG J K,JIANG Y Q,et al.A novel defrosting method using heat energy dissipated by the compressor of an air source heat pump[J].Applied energy,2014,133:101- 111.
[5] WANG Z Y,WANG X M,DONG Z M.Defrost improvement by heat pump refrigerant charge compensating[J].Applied energy,2008,85(11):1050- 1059.
[6] MEI V C,DOMITROVIC R E,CHEN F C,et al.The development of a frost-less heat pump[J].Tennessee valley authority,2002:183- 194.
[7] 马龙霞，刘孜璇，王沣浩，等.带储液气液分离器的空气源热泵除霜系统研究[J].制冷学报，2022,43(2):23- 32.
[8] WANG J J,QV D H,YAO Y,et al.The difference between vapor injection cycle with flash tank and intermediate heat exchanger for air source heat pump:an experimental and theoretical study[J].Energy,2021,221:119796.
[9] 倪龙，魏文哲，姚杨.一种加快空气源热泵除霜速度的控制方法：111623556A[P].2020-09-04.
[10] 魏文哲，徐林彤，刘旭晨，等.准二级压缩空气源热泵补气加速除霜实验[J].制冷学报，2023,44 (2):47- 53,60.
[11] DONG J K,DENG S M,JIANG Y Q,et al.An experimental study on defrosting heat supplies and energy consumptions during a reverse cycle defrost operation for an air source heat pump[J].Applied thermal engineering,2012,37(5):380- 387.
[12] KANG D,JEONG J H,RYU B.Heating performance of a VRF heat pump system incorporating double vapor injection in scroll compressor[J].International journal of refrigeration,2018,96:50- 62.
Experiment on accelerated defrosting of quasi-two-stage compressed air-source heat pump with flash tank
Abstract: In order to improve the performance of reverse cycle defrosting of a quasi-two-stage compressed air-source heat pump with the flash tank, this paper uses the existing cycle structure of the unit to realize vapor injection by opening the solenoid valve during defrosting and increase the refrigerant mass flow. The experimental results show that vapor injection can reduce frost melting time, thus effectively reduce defrosting time and defrosting energy consumption, and the lower the outdoor temperature is, the more significant the effect is. In the experimental environment of-10 ℃ to 2 ℃, the defrosting time is shortened by 23.73% to 40.48%, and the defrosting power consumption is reduced by 17.75% to 45.90% after using vapor injection defrosting.
Keywords: air-source heat pump; vapor injection defrosting; conventional defrosting; defrosting time; defrosting power consumption; flash tank; reverse cycle defrosting;
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