Inverter-controlled sealed compressor
AssigneeMatsushita Refrigeration Company
InventorsTatsuyuki Iizuka, Seigo Yanase
Life of this patent
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Abstract
A sealed compressor for use in a refrigerator includes a sealed housing having an interior communicated to the outside of the sealed housing through a discharge tube, a compressor element accommodated within the sealed housing, an electric element accommodated within the sealed housing for driving the compressor element, and a coupling tube fluid-connecting the compressor element and the discharge tube within the sealed housing. To avoid a resonant motion of the coupling tube which would otherwise generate obnoxious noise, an inverter controller is employed to allow the electric element to be operated at one of a plurality of frequencies other than the resonance frequency of the coupling tube.
Claims2
A sealed compressor for use with a commercial power source outputting electric power at a predetermined frequency, said compressor comprising:
- a sealed housing having an interior communicated to outside thereof through a discharge tube;
- a compressor element accommodated within the sealed housing;
- an electric element accommodated within the sealed housing for driving the compressor element;
- a coupling tube fluid-connecting the compressor element and the discharge tube within the sealed housing;
- and
- an inverter controller for operating the electric element at a plurality of operating frequencies other than the frequency at which the coupling tube tends to undergo a resonant motion, the plurality of operating frequencies being lower than or equal to the predetermined frequency of the electric power outputted from the commercial power source to which the compressor is to be connected.
Dependencies are inferred from the claim text.