Invention Grant
- Patent Title: Refrigeration apparatus
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Application No.: US17012868Application Date: 2020-09-04
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Publication No.: US11280525B2Publication Date: 2022-03-22
- Inventor: Tomoyuki Haikawa , Tomoatsu Minamida , Shigeharu Taira
- Applicant: DAIKIN INDUSTRIES, LTD.
- Applicant Address: JP Osaka
- Assignee: DAIKIN INDUSTRIES, LTD.
- Current Assignee: DAIKIN INDUSTRIES, LTD.
- Current Assignee Address: JP Osaka
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Main IPC: F25B1/04
- IPC: F25B1/04 ; F25B1/00 ; F25B49/02

Abstract:
To reduce the possibility that temperature of refrigerant discharged from a compressor of a refrigeration apparatus becomes excessively high by controlling torque of a motor built into the compressor, the compressor includes the motor having rotation thereof controlled by inverter control. An inverter controller controls torque of the motor using inverter control when operation frequency of the compressor is at least one value within a range of from 10 Hz to 40 Hz. When at least the operation frequency is within the range of from 10 Hz to 40 Hz, torque of the motor is controlled, and under a predetermined condition in which temperature of refrigerant discharged from the compressor easily becomes excessively high, a device controller controls devices provided in a refrigerant circuit such that refrigerant sucked into the compressor is placed in a wet vapor state.
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