Patent ID: 11927380
Assignee: DAIKIN INDUSTRIES, LTD.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A refrigeration apparatus comprising:
a compressor;
a first heat exchanger that allows a first heating medium compressed by the compressor to flow therein and to radiate heat of the first heating medium;
a second heat exchanger that:
allows the first heating medium having passed the first heat exchanger and a second heating medium cooling a cooling target to flow therein, and
causes heat exchange between the first heating medium and the second heating medium;

a first temperature sensor that detects temperature of the second heating medium in the second heat exchanger; and
a control device that controls an operating frequency of the compressor, wherein
the control device:
causes the compressor to operate in a first operating mode that changes the operating frequency by first acceleration,
determines a rate of increase in the temperature, detected by the first temperature sensor, per first predetermined time, and
switches operation of the compressor from the first operating mode to a second operating mode that changes the operating frequency by second acceleration higher than the first acceleration in response to determining that the rate of the increase in the temperature per the first predetermined time has exceeded a first temperature rate threshold.