| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigeration device for accurately estimating high-pressure side pressure by temperature of refrigerant and easily improving the operation efficiency. SOLUTION: The refrigeration device (1) includes refrigerant temperature detection means (20, 22, 24) for detecting the refrigerant temperatures of an inlet part (14), an outlet part (16), and an intermediate part (18) positioned between the inlet/outlet parts of a radiator (6), a high-pressure side pressure estimating means (26) for estimating the high-pressure side pressure of the refrigerant in a high-pressure route part (2a) based on the refrigerant temperatures of the inlet part, the outlet part, and the intermediate part detected by the refrigerant temperature detection means, and a control means (26) for controlling at least either a compressor (4) or an expansion valve (8) to set the high-pressure side pressure of the refrigerant estimated by the high-pressure side pressure estimating means to be predetermined target high-pressure side pressure. COPYRIGHT: (C)2009,JPO&INPIT
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