Refrigerator and controlling method thereof
US11326828B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2019 |
| Grant date | May 10, 2022 |
| Priority date | — |
| Expiry date | Apr 15, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/102
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A refrigerator including a compressor, a condenser, and an expansion unit that constitute a refrigeration cycle, an evaporator that evaporates a refrigerant that has passed through the expansion unit, a heating unit that provides heat for defrosting the evaporator, and a frost sensor unit that is provided at one side of the evaporator to sense the amount of frost on the evaporator, the frost sensor unit including a sound-source transmitting unit that generates a sound-source of a first volume to the evaporator, and a sound-source receiving unit that receives a sound-source of a second volume formed after the sound-source transmitted by the sound-source transmitting unit reflects from or passes through the evaporator, and a controller that controls the heating unit to generate heat, when the difference between the first volume and the second volume reaches a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.