| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigerating air conditioner suppressing increase in condensation pressure when high temperature water is taken out and having good operating efficiency and high reliability. SOLUTION: The refrigerating air conditioner includes a supercooling heat exchanger 3 inserted between a condenser 2 and an electronic type expansion valve 4 of a refrigerating cycle device 31 and cooling a refrigerant from the condenser 2 by exchanging heat with a low temperature refrigerant. Based on refrigerant pressure on the discharge side of the compressor 1 detected by a pressure sensor 11 and refrigerant temperature on the outlet side of the supercooling heat exchanger 3 detected by a thermistor 21, a supercooling degree of the supercooling heat exchanger 3 is calculated, and an opening of the electronic type expansion valve 4 is controlled so that the supercooling degree becomes a first predetermined value. A low pressure gas liquid two-phase refrigerant from the electronic type expansion valve 4 is used as the low temperature refrigerant of the supercooling heat exchanger 3. COPYRIGHT: (C)2011,JPO&INPIT |
