| Title |
Feasibility of the Defrost Control by Photoelectric Technology via Comparison with the Temperature Differential Defrosting Method |
| Authors |
전창덕(Chang-Duk Jeon) ; 김동선(Dong-Seon Kim) |
| DOI |
http://dx.doi.org/10.6110/KJACR.2014.26.9.434 |
| Keywords |
서리 ; 온도차 제상 방법 ; 광센서오제상 현상 Frost ; Temperature Differential Defrosting Method ; Photoelectric Sensor ; Mal-defrost Phenomena |
| Abstract |
Experiments were performed to verify if performance and characteristic curves obtained from the temperature differential defrosting method, where surface temperature is measured to judge defrosting condition, can be reproduced by the photoelectric technology where defrosting condition is judged by photoelectric sensors. The output voltage of a phototransistor and heating capacity, power consumption, and surface temperature of the outdoor heat exchanger are compared. The results showed that the photoelectric sensors can be used as a defrost control device. On-off control timings in temperature differential defrosting method are in good agreement with those predicted by the high and low threshold output voltages of the photoelectric sensor. |