REFRIGERATION CYCLE DEVICE AND LIQUID HEATING DEVICE INCLUDING THE SAME

• Main Authors: IMAGAWA TSUNEKO, YAMAOKA YOSHIKI
• Format: Patent
• Language: English; Japanese
• Published: 25.11.2022
• 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 provide a highly reliable refrigeration cycle device by preventing liquid return by causing a superheating degree of a refrigerant which has passed through a supercooling heat exchanger to become a predetermined value or greater, and a liquid heating device including the refrigeration cycle device.SOLUTION: A refrigeration cycle device includes: a main refrigerant circuit 10; a bypass refrigerant circuit 20; a prior-cooling temperature sensor that detects a temperature of a refrigerant flowing in the bypass refrigerant circuit 20 upstream of an intermediate heat exchanger 13; a post-cooling temperature sensor that detects a temperature of a refrigerant flowing in the bypass refrigerant circuit 20 downstream of the intermediate heat exchanger 13; and a control device 60. The control device 60 calculates a superheating degree of the refrigerant to be merged to a compression rotary element on the basis of temperature data acquired from the prior-cooling temperature sensor and the post-cooling temperature sensor, and performs an operation so as to reduce a valve opening of a second expansion device 21 when the calculated superheating degree is below a predetermined value.SELECTED DRAWING: Figure 1 【課題】過冷却熱交換器を通過した後の冷媒の過熱度を所定値以上にすることで、液バックを防止して信頼性の高い冷凍サイクル装置及びそれを備えた液体加熱装置を提供すること。【解決手段】主冷媒回路１０と、バイパス冷媒回路２０と、中間熱交換器１３より上流側のバイパス冷媒回路２０を流れる冷媒の温度を検出する冷却前温度センサと、中間熱交換器１３より下流側のバイパス冷媒回路２０を流れる冷媒の温度を検出する冷却後温度センサと、制御装置６０とを備え、制御装置６０は、冷却前温度センサと冷却後温度センサとから取得する温度データに基づいて、圧縮回転要素に合流される冷媒の過熱度を算出し、算出された過熱度が所定値を下回る場合には第２膨張装置２１の弁開度を小さくなるように動作させることを特徴とする冷凍サイクル装置。【選択図】図１