公开(公告)号：US09772131B2

公开(公告)日：2017-09-26

申请号：US14787288

申请日：2013-05-23

Applicant: Mitsubishi Electric Corporation

Inventor： Kazunori Hatakeyama ,  Shota Kamiya ,  Kenta Yuasa ,  Shinya Matsushita ,  Shinsaku Kusube

IPC: F25B49/02 ,  H02M7/5395 ,  F25B1/10 ,  F25B13/00 ,  F25B40/00

CPC classification number: F25B49/025 ,  F25B1/10 ,  F25B13/00 ,  F25B40/00 ,  F25B2313/003 ,  F25B2341/0662 ,  F25B2400/13 ,  F25B2600/021 ,  H02M7/5395 ,  Y02B30/741

Abstract: A heat pump device capable of efficiently and reliably preventing a liquid refrigerant from stagnating in a compressor an air conditioner, a heat pump water heater, a refrigerator, and a freezing machine including the heat pump device. The configuration is such that, when the compressor is under operation standby, a high-frequency voltage synchronizing with a carrier signal is supplied to the compressor motor to carry out the locked energization of the compressor motor. From respective inter-phase voltages, respective phase voltages, or respective phase currents of the compressor motor for a plurality of high-frequency energization cycles, the detection values for one high-frequency energization cycle are restored. A power value calculated using the restored detection values for one high-frequency energization cycle is controlled to coincide with a heating power command necessary for discharging the liquid refrigerant stagnated in the compressor to the outside of the compressor.

公开(公告)号：US10432106B2

公开(公告)日：2019-10-01

申请号：US15771115

申请日：2016-01-21

Applicant: Mitsubishi Electric Corporation

Inventor： Shinya Matsushita

IPC: H02M5/458 ,  H02M7/44 ,  H02M7/00 ,  H02M7/06 ,  H05K7/06 ,  H05K3/32 ,  H05K3/20 ,  H01R11/01 ,  H05K1/02 ,  H05K1/18 ,  H05K3/22

Abstract: A power conversion device includes a printed wiring board on which an alternating-current power-supply input part, a converter circuit part to convert alternating-current power to direct-current power, an inverter circuit part to convert direct-current power converted by the converter circuit part to alternating-current power, an alternating-current power-supply output part to output alternating-current power converted by the inverter circuit part, and a conductive pattern to electrically connect the alternating-current power-supply input part, the converter circuit part, the inverter circuit part, and the alternating-current power-supply output part to one another are provided, and a busbar that has a plate-like shape with a plane direction thereof perpendicular to a plane direction of the printed wiring board, is arranged to overlap the conductive pattern in plan view, and includes two or more connecting portions that are in contact with the conductive pattern.