REFRIGERATION CYCLE DEVICE

• Main Authors: KONO HIROAKI, KATO YOSHITAKE, ISSHI YOSHINORI, MUTO NAITO, IJUIN YUKIHISA, HIRAYAMA JUNKI, YOKOO YASUHIRO, HAYASHI YOSHIO
• Format: Patent
• Language: English; Japanese
• Published: 06.12.2022
• Subjects: BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; REFRIGERATION MACHINES, PLANTS OR SYSTEMS; REFRIGERATION OR COOLING; WEAPONS

To suppress the occurrence of a sleeping phenomenon of a refrigerant.SOLUTION: A refrigeration cycle device comprises: a compressor 11 for sucking a refrigerant, and compressing and discharging it; a heat radiation part 12 for heat-radiating the refrigerant which is discharged from the compressor; a first decompression part 14a for decompressing the refrigerant which is heat-radiated by the heat radiation part; a second decompression part 14b arranged in parallel with the first decompression part in a flow of the refrigerant, decompressing the refrigerant which is heat-radiated by the heat radiation part, and capable of blocking the circulation of the refrigerant; a first evaporator 15 for evaporating the refrigerant which is decompressed by the first decompression part; a second evaporator 16 for evaporating the refrigerant which is decompressed by the second decompression part; and a control part 70 for controlling at least either of the first decompression part and the second decompression part so that the pressure of the refrigerant in the second evaporator reaches the pressure of the refrigerant in the first evaporator or higher when the circulation of the refrigerant to the second evaporator is blocked by the second decompression part, and a peripheral temperature of the second evaporator is lower than a temperature of the refrigerant in the first evaporator.SELECTED DRAWING: Figure 4 【課題】冷媒の寝込み現象が発生することを抑制する。【解決手段】冷媒を吸入して圧縮し吐出する圧縮機１１と、圧縮機から吐出された冷媒を放熱させる放熱部１２と、放熱部で放熱された冷媒を減圧させるとともに第１減圧部１４ａと、冷媒の流れにおいて第１減圧部と並列に配置され、放熱部で放熱された冷媒を減圧させるとともに冷媒の流通を遮断可能な第２減圧部１４ｂと、第１減圧部で減圧された冷媒を蒸発させる第１蒸発器１５と、第２減圧部で減圧された冷媒を蒸発させる第２蒸発器１６と、第２蒸発器への冷媒の流通が第２減圧部によって遮断されており、且つ第２蒸発器の周囲温度が第１蒸発器における冷媒の温度よりも低い場合、第２蒸発器における冷媒の圧力が、第１蒸発器における冷媒の圧力以上となるように第１減圧部および第２減圧部のうち少なくとも一方の減圧部を制御する制御部７０とを備える。【選択図】図４