Failure analysis of condensing units for refrigerators with refrigerant R134a, R404A

被引：15
|
作者：
Bogdanovska, Gabriela [1 ]
Molnar, Vieroslav [2 ]
Fedorko, Gabriel [1 ]
机构：
[1] Tech Univ Kosice, Fac Min Ecol Proc Control & Geotechnol, Letna 9, Kosice 04200, Slovakia
[2] Tech Univ Kosice Seat Presov, Fac Mfg Technol, Bayerova 1, Presov 08001, Slovakia
来源：
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | 2019年 / 100卷
关键词：
Failure analysis; Condensing unit; Increasing reliability; FAULT-DETECTION; GENETIC ALGORITHM; AIR-CONDITIONERS; PERFORMANCE; PLACEMENT; DIAGNOSIS; EROSION; LEAKAGE;
D O I：
10.1016/j.ijrefrig.2018.11.028
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The article deals with analysis of defects of condensing units for refrigerators with R134a, R404A refrigerant, which caused frequent complaints to the company. Up to 30% of the claims related to a valve of the condensing unit. Various quality management tools and risk assessment methods were used to solve the problem. The Pareto analysis and Lorenz curve were used to determine the significant minor causes that need to be addressed to resolve the majority of problems. Based on the Fault Tree Analysis (FTA), a change in the technological process was made for assembly and installation procedure of the valve to the base plate and in hard brazing of the tube and the valve, thus reducing the number of defects in the condensing unit by 40%. Valve defects have been reduced by nearly 50%. (C) 2018 Elsevier Ltd and IIR. All rights reserved.
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页码：208 / 219
页数：12
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