Heat pump device, heat pump system, air conditioner, and refrigeration machine
AssigneeMitsubishi Electric Corporation
InventorsTakashi YAMAKAWA, Keisuke UEMURA
Life of this patent
Estimating the term…
Abstract
A heat pump device includes a compressor that compresses refrigerant, a motor that drives the compressor, an inverter that applies a desired voltage to the motor, and an inverter controlling unit that generates a pulse width modulation signal for driving the inverter, has, as operation modes, a heating operation mode performing heating operation of the compressor and a normal operation mode performing normal operation of the compressor to compress the refrigerant, and periodically changes carrier frequency, that is frequency of a carrier signal, in the heating operation mode.
Claims17
A heat pump device comprising:
- a compressor to compress refrigerant;
- a motor to drive the compressor;
- an inverter to apply a desired voltage to the motor;
- and
- an inverter controller to generate a pulse width modulation signal for driving the inverter, the inverter controller having, as operation modes, a heating operation mode for performing heating operation of the compressor and a normal operation mode for performing normal operation of the compressor to compress the refrigerant, the inverter controller periodically changing a carrier frequency symmetrically with respect to a center value reference in the heating operation mode, the carrier frequency being a frequency of a carrier signal.
A heat pump system comprising:
- a heat pump device including a refrigerant circuit, the refrigerant circuit including a compressor including a compression mechanism to compress refrigerant, a first heat exchanger, an expansion mechanism, and a second heat exchanger sequentially connected via piping;
- and a fluid using device to use fluid subjected to heat exchange with the refrigerant by the first heat exchanger, the fluid using device being connected with the refrigerant circuit, wherein
- the heat pump device includes:
- the compressor to compress the refrigerant;
- a motor to drive the compressor;
- an inverter to apply a desired voltage to the motor;
- and
- an inverter controller to generate a pulse width modulation signal for driving the inverter, the inverter controller having, as operation modes, a heating operation mode for performing heating operation of the compressor and a normal operation mode for performing normal operation of the compressor to compress the refrigerant, the inverter controller periodically changing carrier frequency symmetrically with respect to a center value reference in the heating operation mode, the carrier frequency being frequency of a carrier signal.
Dependencies are inferred from the claim text.