| 摘要 |
PURPOSE: A refrigerator having a quick-freezing chamber is provided to implement a cryogenic quick-freezing process with a two-stage first freezing cycle and a one-stage second freezing cycle. CONSTITUTION: A refrigerator having a quick-freezing chamber includes a first freezing cycle comprising a first compressor (11), a first condenser (12), a first expansion valve (13), a first evaporator (14), a second expansion valve (15), and a second evaporator (16). The first condenser condenses a refrigerant which is compressed by the first compressor. The first expansion valve expands the refrigerant, which is condensed by the first condenser, with one stage, and separates the refrigerant at the same time. The first evaporator evaporates the refrigerant, which is expanded and separated by the first expansion valve, in order to maintain temperature inside the quick-freezing chamber (100) to be low. The second expansion valve expands the refrigerant, which is expanded and separated by the first expansion valve at low temperature and low pressure, with two stages. The second evaporator evaporates the refrigerant, which is expanded by the second expansion valve, in order to cool the quick-freezing chamber. |
