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Sensorless temperature control of household refrigerators based on the electric current of the compressor.

Author(s) : SILVEIRA A. S., SOUZA G. A., LISTON R. J., MACHADO E., HERMES C. J. L.

Type of article: IJR article

Summary

The present study is aimed at putting forward a novel temperature controller (including software and hardware) for a fan-and-damper refrigerator considering the electric current drawn by the single-speed compressor as the process variable. The control algorithm consists in a dynamic reference modification of a PI controller, together with a set of empirical conjectures. In addition, a purpose-built electronic board was designed and prototyped. All experiments were performed in-house with the refrigerator placed in a climate chamber. The refrigerator was tested at two different surrounding air temperatures (16 and 25 °C) under pulldown, defrost recovery, and variable ambient temperature regimes. It was noted that the proposed controller was able to maintain the refrigerator temperature within ±1 °C tolerance bounds – figures like those obtained for the baseline thermistor-based temperature controller – albeit being less costly.

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Pages: 171-175

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Details

  • Original title: Sensorless temperature control of household refrigerators based on the electric current of the compressor.
  • Record ID : 30031950
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 152
  • Publication date: 2023/08
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2023.04.018

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