Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Signal Analysis of Inverter-Type Outdoor Unit for Detecting Operation Changes of Commercial Refrigerator

상업용 냉장고의 상황 감지를 위한 인버터형 실외기 신호 분석

  • Lim, Hyo Joon (Department of Mechanical Engineering, Pusan National University) ;
  • Lee, Ju Kyoung (Department of Mechanical Engineering, Pusan National University) ;
  • Hwang, Jun Hyeon (SAC R&D Laboratory, LG Electronics) ;
  • Lee, Kyung Chang (Department Control and Instrumemtation Engineering, Pukyoung University) ;
  • Lee, Suk (Department of Mechanical Engineering, Pusan National University)
  • 임효준 (부산대학교 기계공학부) ;
  • 이주경 (부산대학교 기계공학부) ;
  • 황준현 (LG전자 시스템에어컨연구소) ;
  • 이경창 (부경대학교 제어계측공학과) ;
  • 이석 (부산대학교 기계공학부)
  • Received : 2015.11.09
  • Accepted : 2016.01.20
  • Published : 2016.06.03
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Abstract

Unlike household refrigerators, commercial refrigerators are composed of separate indoor and outdoor units. The outdoor unit of most commercial refrigerators is designed to run at a fixed speed, which results in low energy efficiency and loud fan noise. Moreover, it cannot respond flexibly to changing thermal load in the indoor unit. Inverter type outdoor units can address such problems through speed changes based on information obtained from the indoor unit. However, using two units from different manufacturers is often not a viable solution. If condition changes in the indoor unit can be detected without communication between the two units, it is possible to adjust the speed of the outdoor unit. This paper attempts to analyze the signal from the outdoor unit when the condition of the indoor unit changes by varying the thermal load.

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References

  1. Gwon, J.-T., "Showcase and Refrigeration Systems," The Society of Air-Conditioning and Refrigerating Engineers of Korea, Vol. 14, No. 10, pp. 13-24, 2002.
  2. Baek, S.-M., "A Comparison of Operating Characteristics for Industrial Water Cooler with Variation of Control Methods," Journal of the Korean Society for Power System Engineering, Vol. 18, No. 6, pp. 99-105, 2014.
  3. Baek, S.-M., Moon, C.-G., Kim, E.-P., Jeong, S.-K., Yoon, J.-I., et al., "The Characteristic Study of Capacity Control of and Industrial Cooler Using an Invertor Compressor with Varying the Ambient Temperatures," Journal of the Korean Society of Marine Engineering, Vol. 35, No. 2, pp. 238-243, 2011. https://doi.org/10.5916/jkosme.2011.35.2.238
  4. Shin, T.-J., Lee, S.-K., and Jang, J.-U., "A Study on Health Monitoring of a Refrigerator Compressor Based on Higher Order Time-Frequency Analysis and Artificial Neural Network," J. Korean Soc. Precis. Eng., Vol. 29, No. 12, pp. 1313-1320, 2012. https://doi.org/10.7736/KSPE.2012.29.12.1313
  5. Chae, H.-M., Kim, C.-N., and Park, S.-K., "A Numerical Analysis with the FSI Mode on the Characteristics of Flow Field and Discharge Valve Motion in a Rotary Compressor," J. Korean Soc. Precis. Eng., Vol. 25, No. 5, pp. 112-120, 2008.
  6. Lee, S.-T., Kim, H.-J., and Kim, D.-K., "Development of Multi-Refrigerator Energy-Saving Power Converter and the Combined Control system," The Transactions of the Korean Institute of Power Electronics, Vol. 17, No. 6, pp. 516-522, 2012. https://doi.org/10.6113/TKPE.2012.17.6.516
  7. Ahn, J.-H., Jang, Y.-H., Kim, Y.-C., Choi, W.-S., Oh, S.-W., et al., "An Experimental Study on the Performance Characteristics of a Multi Type Refrigerator Using R600a," The Society of Air-Conditioning and Refrigerating Engineers of Korea, Vol. 21, No. 4, pp. 222-228, 2009.
  8. Son, J.-K. and Chun, T.-W., "Analysis and Efficiency Control of Linear Compressor System for Refrigerator Driven by PWM Inverter," The Transactions of the Korean Institute of Electrical Engineers, Vol. 62, No. 11, pp. 1544-1549, 2013. https://doi.org/10.5370/KIEE.2013.62.11.1544
  9. Han, D.-Y. and Shin, S.-C., "The Indoor Temperature Control Algorithm for a Bio-Cleanroom by Using a Fuzzy Logic," The Society of Air-Conditioning and Refrigerating Engineers of Korea, Vol. 23, No. 7, pp. 24-29, 2011.
  10. Kwon, Y.-C., Jin, E.-S., Heo, S.-H., Kim, D.-H., Hong, J.-T., et al., "Performance of Compressor with Variable Capacity," The Korea Society for Energy Engineering, Vol. 13, No. 3, pp. 214-218, 2004.
  11. Song, J.-Y., Ahn, B.-C., Ju, Y.-D., Kim, J., Baek, S.-J., et al., "A Study on Heating Performance with Feedforward and Feedback Control for Central Heating System," Korean Journal of Air-Conditioning and Refrigeration Engineering, pp. 1064-4069, 2010.
  12. Lim, D.-Y. and Ryoo, Y.-J., "Design of Intelligent Diagnostic System for Refrigerator," Journal of Korean Institute of Intelligent Systems, Vol. 14, No. 3, pp. 267-272, 2004.
  13. Koh, T.-B., "The Study on Intelligent Cooling Load Forecast of Ice-Storage System," The Transactions of the Korean Institute of Electrical Engineers, Vol. 57, No. 11, pp. 2061-2065, 2008.