| Title |
Failure Diagnosis Method by Detecting the Temperature and Pressure Difference of the Refrigerator |
| Authors |
김영민(Young-Min Kin) ; 이민구(Min-Goo Lee) ; 김종빈(Jong-Bin Kim) ; 최태성(Tae-Seong Choi) ; 박민수(Min-Soo Park) ; 김재언(Jae-Eon Kim) |
| DOI |
https://doi.org/10.5370/KIEE.2022.71.12.1857 |
| Keywords |
PLC; Refrigerator Failure; Diagnostic Method; Evaporator and condenser; Expansion valve |
| Abstract |
A refrigerator that maintains the appopriate temperature is an important factor for safe medicines and foods. Accordinly, the standards of the Food Safety Management Certification Standard (HACCP) are being strengthened. HACCP certification is immediately revoked if the management standards of critical management facilities are deviated from the implementation of the One-Strikeout System in 2015. Aging refrigerators are causing a numerous problems in recent summer operation. However, replacing all aging refrigerators is expensive and time consuming. It requires a high level of skill to inspect a condition of refrigerator only with limited pressure and temperature without special measuring equipment. Currently, on-site inspections and repairs rely only on experience and knowledge of operators. Therefore, unskilled workers face difficulties in inspection and repair. In order to solve this problem, this paper proposes a fault diagnosis method using PLC. |