Title:
REFRIGERATION AIR-CONDITIONING DEVICE AND CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/082331
Kind Code:
A1
Abstract:
This refrigeration air-conditioning device has: a refrigeration circuit in which a compressor, a condenser, an expansion unit, an evaporation unit, and an accumulator are connected via piping and a non-azeotropic mixed refrigerant is circulated; an inflow temperature sensor for measuring the temperature of the non-azeotropic mixed refrigerant flowing into the evaporation unit; and a control device which, during a checking mode for controlling the refrigerant circuit so that the pressure of the non-azeotropic mixed refrigerant flowing into the evaporation unit is a set pressure, calculates a temperature difference between the saturation temperature at the set pressure and the temperature measured by the inflow temperature sensor, and compares the temperature difference and a threshold value to determine whether there is leaking of the non-azeotropic mixed refrigerant.
Inventors:
NAKAGAWA MASAHIKO (JP)
SAIKUSA TETSUJI (JP)
SAIKUSA TETSUJI (JP)
Application Number:
PCT/JP2017/038682
Publication Date:
May 02, 2019
Filing Date:
October 26, 2017
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B49/02; F25B1/00
Domestic Patent References:
| WO2009093297A1 | 2009-07-30 | |||
| WO2013168199A1 | 2013-11-14 |
Foreign References:
| JP2008025935A | 2008-02-07 | |||
| JPH0599542A | 1993-04-20 | |||
| JP2012137210A | 2012-07-19 | |||
| JP2008249234A | 2008-10-16 | |||
| JP2003042655A | 2003-02-13 | |||
| JP2011007457A | 2011-01-13 | |||
| JP2005106314A | 2005-04-21 | |||
| JPH0854161A | 1996-02-27 | |||
| JPH07198235A | 1995-08-01 |
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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