공기유동절환시스템을 이용한 이중제어형 간냉식 냉동냉장고

The dual-controlled refrigeration system is devised to enhance the energy efficiency and basic performance of an indirect cooling household refrigerator/freezer. In order to alternately serve the fresh food and freezer compartment with conventional simple refrigeration cycle, two capillary tubes and on/off valves are adopted. The air flow switching system, which is composed of two fans and dampers, is used to provide air flow for each compartment. The cycle and air flow switching system are controlled on the basis of each compartment temperature. In the present investigation, the 510liter prototype unit is built by the modification of a conventional refrigerator/freezer. The cycle matching and performance test is conducted at 30℃ ambient temperature. The energy consumption test reveals that, compared to the conventional system, the energy consumption of the present refrigeration system is reduced by 9% smaller. Moreover, the refrigeration pull down test result shows that with the present refrigeration system, the refrigeration and freezing time become about 10miniutes shorter than the conventional system.