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Patent Searching and Data


Title:
HEAT PUMP DEVICE, HEAT PUMP SYSTEM, AIR CONDITIONER, AND REFRIGERATOR
Document Type and Number:
WIPO Patent Application WO/2020/225860
Kind Code:
A1
Abstract:
This heat pump device (100) is provided with: a compressor (1) that compresses a refrigerant; a motor (8) that drives the compressor (1); an inverter (9) that applies a desired voltage to the motor (8); and an inverter control unit (10) that generates a pulse width modulation signal for driving the inverter (9) and that has, as operation modes, a heating operation mode for heating the compressor (1) and a normal operation mode for normally operating the compressor (1) and compressing the refrigerant, the inverter control unit periodically changing, in the heating operation mode, a carrier frequency, which is the frequency of a carrier signal.

Inventors:
YAMAKAWA TAKASHI (JP)
UEMURA KEISUKE (JP)
Application Number:
JP2019/018302
Publication Date:
November 12, 2020
Filing Date:
May 07, 2019
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B1/00; F04B49/06; F04C28/28; F25B49/02; H02P27/08
Domestic Patent References:
WO2012172684A12012-12-20
WO2014002251A12014-01-03
Foreign References:
JP2016119822A2016-06-30
JP2005269880A2005-09-29
JP2010130850A2010-06-10
JP5693617B22015-04-01
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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