Title:
STATE ESTIMATION DEVICE, METHOD, PROGRAM AND RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2019/189754
Kind Code:
A1
Abstract:
The present invention does not require the introduction of a sensor for acquiring information on modification/alteration or on the environment of a freezing showcase or the like, and simplifies the determining of whether a filter cleaning is necessary in a client shop in which the freezing showcase has already been introduced. This state estimation device is provided with: a power information acquisition unit which acquires time series data of power values of a freezing showcase; a power information holding unit which holds power information during an intermittent operation in a state where the freezing showcase is normal; an evaluation unit which evaluates, from the time series data of the power values, the power information during the intermittent operation of the freezing showcase and derives the degree of difference from the power information during the intermittent operation in the state where the freezing showcase is normal; a filter cleaning determination unit which estimates, on the basis of the degree of difference, a clogged state of a filter of the freezing showcase and determines whether the filter cleaning is necessary; and an output unit which outputs the indication based on the determination result that the filter cleaning is necessary.
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Inventors:
SANEYOSHI EISUKE (JP)
Application Number:
PCT/JP2019/013986
Publication Date:
October 03, 2019
Filing Date:
March 29, 2019
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
F25D23/00; A47F3/04; F25B49/02; F25D11/00
Foreign References:
| JPH06235577A | 1994-08-23 | |||
| JP2004113681A | 2004-04-15 | |||
| JPH0680019A | 1994-03-22 | |||
| JPH07199749A | 1995-08-04 | |||
| JP2014105932A | 2014-06-09 |
Attorney, Agent or Firm:
KATO, Asamichi (JP)
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