AIR CONDITIONING DEVICE

• Main Authors: YANACHI, Satoru, KATO, Naoki, NOMOTO, So, TSUKIYAMA, Ryo, MATSUDA, Takuya
• Format: Patent
• Language: English; French; German
• Published: 29.12.2021
• Subjects: AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING; BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; RANGES; REFRIGERATION MACHINES, PLANTS OR SYSTEMS; REFRIGERATION OR COOLING; VENTILATING; WEAPONS

An air conditioning device (1000) has: a refrigerant circuit (100) that is formed of a compressor (1), a switching valve (2), a cascade heat exchanger (3), an expansion valve (4) and an outdoor heat exchanger (5) connected to one another by a first pipe (21) through which a refrigerant flows, and capable of performing a defrosting operation in which the refrigerant discharged from the compressor (1) is introduced into the outdoor heat exchanger (5); a heat-transfer medium circuit (200) that is formed of a pump (12), the cascade heat exchanger (3), and the indoor heat exchanger (11) connected to one another by a second pipe (23) through which a heat-transfer medium flows; and a control device (31) that controls the compressor (1) and the pump (12). When an amount of heat storage of the heat-transfer medium is less than a threshold, the control device (31) reduces the heating capability of the indoor heat exchanger (11) when the air conditioning device (1000) transitions from a heating operation to the defrosting operation.