Patent ID: 11933537
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Measurement (Instruments)
Classification: CPC A  F  G  H | IPC F  G  H

Claim 9:
10. The refrigerator of claim 1, comprising:
a reflected wave detecting unit that detects a reflected wave returning to the oscillating unit; and
a reflectance calculating unit that calculates a reflectance which is a ratio of the reflected wave to an incident wave output from the oscillating unit, wherein
at a first timing where a reflectance lower than a first threshold value is calculated, the operation is switched from the normal operation to a quenching operation that more rapidly cools the cooling/heating chamber than during the normal operation, wherein
at a second timing after the start of the quenching operation where the reflectance reaches a second threshold value that is a value lower than the first threshold value, the oscillating unit starts to intermittently apply an AC voltage to between the oscillation electrode and the counter electrode, and wherein
when a predetermined time elapses from a third timing after the oscillating unit starts to intermittently apply the AC voltage where the reflectance reaches a third threshold value that is a value lower than the second threshold value, the quenching operation terminates, with the result that the normal operation is resumed and the intermittent application of the AC voltage by the oscillating unit terminates.