Inverter-integrated electric compressor and circuit board, and method for manufacturing circuit board

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 10608547
APP PUB NO 20180281565A1
SERIAL NO

15764351

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Importance

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Abstract

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To improve the accuracy of detecting a current flowing through an electric compressor after operation of the electric compressor, the electric compressor having a large change in temperature before and after operation. An inverter-integrated electric compressor (1) that compresses and discharges a refrigerant suctioned therein, includes an inverter device (2) provided with a circuit board (60) mounted with an inverter circuit (40), the inverter device (2) being integrally incorporated in an inverter case. The circuit board (60) is provided with a current detection circuit (30) that detects an input current flowing through the inverter circuit (40), and an offset correction circuit (20). The current detection circuit (30) includes a shunt resistor (32) that is serially connected to the inverter circuit (40) and detects a current, and a first amplifier (31) that amplifies and outputs a voltage appearing as a voltage drop in the shunt resistor (32). The offset correction circuit (20) includes a second amplifier (21) that performs an offset correction of the first amplifier (31). The first amplifier (31) and the second amplifier (21) are integrated into a single integrated circuit.

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Patent Owner(s)

  • MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Aiba, Kenichi Tokyo, JP 7 23
Ito, Masato Tokyo, JP 143 1819
Nakagami, Takashi Tokyo, JP 50 462
Nishikawa, Naoki Tokyo, JP 76 920
Saito, Katsuhiro Tokyo, JP 19 95
Shimizu, Kenji Tokyo, JP 173 1774
Watanabe, Kyohei Tokyo, JP 13 12

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