Self-diagnosing apparatus for refrigerator

Abstract

To provide a self-diagnosing apparatus for a refrigerator which self-diagnoses an operation condition and advises a user of an appropriate improvement action if there is an abnormal. First, a detector such as an internal temperature sensor detects a plurality of condition-indicative quantities with respect to the refrigerator, and the condition-indicative quantities are stored in a memory part for a predetermined period. A diagnostic device such as a diagnosis calculation value judging part compares the condition-indicative quantities or a diagnosis calculation value which is calculated based on the condition-indicative quantities with a predetermined threshold value, and judges whether the operation condition of the refrigerator is normal or abnormal based on a result of the comparison. At this stage, if the condition-indicative quantities covering the predetermined past period which are stored in the memory are used as the condition-indicative quantities for the diagnosis, it is possible to accurately diagnose without influence of a condition-indicative quantity which suddenly appears. When it is judged that there is an abnormal condition as a result of the diagnosis, an improvement action which is preliminary determined for the abnormal condition is selected. The selected action is displayed visually or as a sound by an outputting device such as a sound emitter. Where a re-diagnosis is executed after a predetermined time since the abovementioned diagnosis and the outputting device output the improvement action based on a result of the re-diagnosis, it is possible to diagnose with an enhanced reliability.

Dependencies are inferred from the claim text.