Characteristics and control of popping noise in the refrigerator with R600a.

Number: 2259

Author(s) : ZHANG Y., ELBEL S.


The popping noise in the refrigerator is the most common noise problem. The popping noise is caused by the condensation-induced shock inside the capillary tube. The system's performance influences the occurrence of popping noise. In this paper, an R600a vapor-compression cycle is utilized to study the properties of popping noise in the refrigerator. The system is a mock-up system of an existing refrigerator system. The system is placed in a semi-anechoic chamber with a high-frequency microphone setup. This paper discusses the characteristics of popping noise in different operating conditions. The amplitude of the popping noise was determined by the shock wave caused by the bubble collapsing, which is hard to control. The most effective way to control popping noise is to reduce the number of bubbles collapsing inside the cap tube. Therefore, the main principle of popping noise mitigation is heat transfer control between the capillary tube and the suction line. A linear correlation between popping noise loudness and the heat transfer between the cap tube and suction line is given in the paper.

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Pages: 8 p.




  • Original title: Characteristics and control of popping noise in the refrigerator with R600a.
  • Record ID : 30030633
  • Languages: English
  • Subject: Technology
  • Source: 2022 Purdue Conferences. 19th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2022


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