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Title:
PIPING LENGTH MEASURING SYSTEM AND PIPING LENGTH CALCULATING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2012/101744
Kind Code:
A1
Abstract:
A frequency characteristic measuring apparatus (10) is disposed close to a cooling medium piping (70) end portion on the outdoor unit (50) side, said cooling medium piping connecting the outdoor unit (50) and an indoor unit (60) to each other in an air-conditioner, and the frequency characteristic measuring apparatus measures the frequency characteristics of the cooling medium piping (70). A filter (30) is attached at a position further toward the outdoor unit (50) side than the position where the terminal (11) of the frequency characteristic measuring apparatus (10) is connected, such that the filter wraps the cooling medium piping (70). A piping length calculating apparatus (20) is connected to the frequency characteristic measuring apparatus (10) via an interface cable (40), and acquires, via the interface cable (40), the frequency characteristics that have been measured by means of the frequency characteristic measuring apparatus (10). The piping length calculating apparatus (20) extracts a minimum antiresonant frequency from the thus acquired frequency characteristics, and calculates the length of the cooling medium piping (70) on the basis of the minimum antiresonant frequency thus extracted.

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Inventors:
MUKAI TAKUYA (JP)
HIGUMA TOSHIYASU (JP)
Application Number:
PCT/JP2011/051241
Publication Date:
August 02, 2012
Filing Date:
January 24, 2011
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
MUKAI TAKUYA (JP)
HIGUMA TOSHIYASU (JP)
International Classes:
G01B7/02; F24F1/32
Foreign References:
JPH07294233A1995-11-10
JP2007085892A2007-04-05
JP2003248027A2003-09-05
JP2000131004A2000-05-12
JP2007085892A2007-04-05
Other References:
See also references of EP 2669620A4
Attorney, Agent or Firm:
KIMURA MITSURU (JP)
Mitsuru Kimura (JP)
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Claims:



 
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