Research on Friction Loss in an R290 Air Conditioner Compressor Inverter Operation

Yu Haichao; Shi Zhengliang; Sun Feifan; Wang Ruixiang

doi:10.12465/issn.0253-4339.20250728001

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Research on Friction Loss in an R290 Air Conditioner Compressor Inverter Operation

更新时间：2026-01-21

- Research on Friction Loss in an R290 Air Conditioner Compressor Inverter Operation
- Journal of Refrigeration Pages: 1-9(2025)
- 作者机构：
  
  1.北京建筑大学环境与能源工程学院北京 100044
  2. 广东省制冷设备节能环保技术企业重点实验室珠海 519070
  3. 珠海格力电器股份有限公司珠海 519070
  4. 中国家用电器研究院北京 100037
- 作者简介：
- 基金信息：
  
  EnterpriseProject "Energy-Efficiency Doubling Tech Path for Ultra-Efficient Room AC"(00362024209);Kigali Fund R290 Room Air Conditioner Technical Assistance Project(FECO/LY1/S/20/310)
- DOI：10.12465/issn.0253-4339.20250728001
  CLC： TH455;TB652
- CSTR：XXXXX.XX.XXX.20250728001
- Received：28 July 2025，
  
  Revised：2025-09-23，
  
  Accepted：28 September 2025，
  
  Online First：04 January 2026，
- 稿件说明：
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于海超,史正良,孙非凡等.R290空调器压缩机变频运行摩擦损失研究[J].制冷学报,

Yu Haichao,Shi Zhengliang,Sun Feifan,et al.Research on Friction Loss in an R290 Air Conditioner Compressor Inverter Operation[J].Journal of Refrigeration,
于海超,史正良,孙非凡等.R290空调器压缩机变频运行摩擦损失研究[J].制冷学报, DOI：10.12465/issn.0253-4339.20250728001. CSTR： XXXXX.XX.XXX.20250728001.

Yu Haichao,Shi Zhengliang,Sun Feifan,et al.Research on Friction Loss in an R290 Air Conditioner Compressor Inverter Operation[J].Journal of Refrigeration, DOI：10.12465/issn.0253-4339.20250728001. CSTR： XXXXX.XX.XXX.20250728001.

摘要

R290是房间空调器工质替代的主要技术路线，研究R290为工质的压缩机变频运行摩擦损失规律，量化摩擦损失与电机频率之间的关联关系，提高压缩机能效和可靠性能具有重要意义。本文建立了计算滚动转子压缩机摩擦损失的数学模型，计算分析了电机频率、工况、润滑油黏度及摩擦副摩擦系数对主要摩擦副摩擦损失的影响。以排量为9.8 cm³/r的压缩机为对象，对摩擦副改进预测效果进行了实验验证。研究发现：1）通过添加微量的特定添加剂使冷冻机油摩擦系数降低14.35%，压缩机变频运行COP实测提升0.88%~3.80%，与计算结果的最大相对偏差率小于3.1%；2）压缩机的主副轴承和偏心轴承摩擦功率占比大，在低频工况占总摩擦损失的41.7%，高频工况下占比升至60.9%；3）冷冻机油的黏度和润滑性能对不同摩擦副的作用规律不同，主要摩擦副的摩擦损失随频率的变化规律不同，且R290与R32压缩机的差异明显。

Abstract

R290 is the main working fluid used in room air conditioners. Consequently， it is important to study the friction-loss law for compressor-frequency conversion when using R290 as the working fluid， to quantify the correlation between friction loss and motor frequency and to improve energy efficiency and reliability. In this study， a mathematical model for calculating the friction loss of a rolling-rotor compressor was established. The effects on friction loss of the motor frequency， working conditions， lubricating-oil viscosity， and the friction coefficient of the friction pair were analyzed. For a compressor with a displacement of 9.8 cm³/r， the predicted improvement for the friction pair was experimentally verified. Adding a trace amount of specific additives reduced the friction coefficient of the refrigeration oil by 14.35%； the coefficient of performance of the variable-frequency compressor increased by 0.88-3.80%， and the maximum relative deviation from the calculated results was is 3.1%. The friction power of the main， auxiliary， and eccentric bearings of the compressor accounted for 41.7% of the total friction loss under low-frequency conditions and 60.9% of this loss under high-frequency conditions. The viscosity and lubrication properties of the refrigeration oil exerted different effects on different friction pairs. The friction loss of the main friction pair varied with frequency， differing notably between the R290 and R32 compressors.

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references

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