Title:
HEAT PUMP DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/144869
Kind Code:
A1
Abstract:
The present invention comprises: a compressor (1) including a compression mechanism (7) and a motor (8); a heat exchanger (3); an inverter (9) that applies a desired voltage to the motor (8); a current detection unit (31) that detects a current flowing to the motor (8); a drive signal generation unit (15) that generates a drive signal of the inverter (9); a magnetic pole position estimation unit (12) that, when a high-frequency voltage is applied to the motor (8) from the drive signal generation unit (15) to heat the compressor (1), changes a voltage phase of a voltage command value of the high-frequency voltage and estimates a magnetic pole position at which a maximum heating amount can be obtained; a normal heating control unit (13) that, when a high-frequency voltage is applied to the motor (8) from the drive signal generation unit (15) to heat the compressor (1), determines the amplitude and the voltage phase of the voltage command value from the magnetic pole position at which the maximum heating amount can be obtained and a prescribed required heating amount; and a control switching determination unit (14) that causes either the magnetic pole position estimation unit (12) or the normal heating control unit (13) to operate.
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Inventors:
SHIMIZU YUICHI (JP)
HATAKEYAMA KAZUNORI (JP)
HATAKEYAMA KAZUNORI (JP)
Application Number:
PCT/JP2020/000953
Publication Date:
July 22, 2021
Filing Date:
January 15, 2020
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B1/00; H02P6/18
Domestic Patent References:
| WO2013102999A1 | 2013-07-11 | |||
| WO2012107987A1 | 2012-08-16 |
Foreign References:
| JP2005130582A | 2005-05-19 | |||
| JP2015029383A | 2015-02-12 |
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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