Performance Improvement of R 410A Room Air Conditioner by Vapor Injection Refrigeration Cycle Using Scroll Compressor

DOI Web Site 4 References
  • NAKAMURA Hiroo
    Tochigi Air Conditioning Works, Hitachi Appliances,Inc.
  • DAISAKA Hisashi
    Tochigi Air Conditioning Works, Hitachi Appliances,Inc.
  • YOKOYAMA Hidenori
    Tochigi Air Conditioning Works, Hitachi Appliances,Inc.
  • NONAKA Masayuki
    Mechanical Engineering Research Laboratory, Hitachi,Ltd.
  • SAITO Kiyoshi
    Department of Applied Mechanics and Aerospace Engineering School of Fundamental Science and Engineering, Waseda University

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Other Title
  • スクロール圧縮機使用ガスインジェクションサイクルによるR 410A ルームエアコンの性能向上
  • スクロール アッシュクキ シヨウ ガスインジェクションサイクル ニ ヨル R410Aルームエアコン ノ セイノウ コウジョウ

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Abstract

  The vapor injection refrigeration cycle using the scroll compressor driven by inverter was investigated to improve the performance of room air conditioner with R 410A. One injection hole was bored on a fixed scroll plate, and through this hole the vapor refrigeration is injected into two compression rooms of a scroll compressor at different time. Then the pressure change of the compression room and the performance of vapor injection refrigeration cycle are calculated. And the performance of the room air conditioner using vapor injection refrigeration cycle was measured. As the result, the cooling/heating compressor input was decreased to 7.4/3.2 % at capacity 4.0/5.9 kW, and the heating capacity at outdoor temperature -15 °C was increased to 11.9 %.

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