Air-conditioning apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 17, 2024
Grant Date -
Oct 6, 2022
app pub date -
Nov 6, 2019
filing date -
Nov 6, 2019
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An air-conditioning apparatus includes an indoor unit and an outdoor unit including a compressor that compresses a refrigerant and a motor drive system that drives the compressor. The motor drive system includes an inverter that converts a DC voltage into an AC voltage, and an electric motor including three stator windings with both ends open. The electric motor operates based on the AC voltage obtained by the inverter. The motor drive system further includes a connection state switching unit that has a function to change the connection state of the three stator windings included in the electric motor, and sets the connection state to a star connection at the start of operation of the air-conditioning apparatus.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2019 Application Filing Year
- H02K Class
- 3215 Applications Filed
- 2232 Patents Issued To-Date
- 69.43 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- H02K Class
- 0 % this patent is cited more than
- 1 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Mar 17, 2028 |
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| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Mar 17, 2036 |
