| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a heat pump device that accurately estimates discharge pressure at a low cost without using a pressure switch or discharge pressure detection means. <P>SOLUTION: The heat pump device includes: a heat pump cycle that connects with a compressor 22, heat radiator 23, expansion valve 24, and evaporator 25; a discharge temperature detection means 52 that detects temperature of a cooling medium discharged from the compressor 22; and a temperature detection means 53 for a heat radiator outlet that detects the temperature of the cooling medium of the outlet of the heat radiator 23. The heat pump estimates the pressure of the cooling medium that is discharged from the compressor 22 based on the temperature of the cooling medium that is detected by the discharge temperature detection means 52 and the temperature of the cooling medium that is detected by the temperature detection means 53 for a heat radiator outlet without using the pressure switch or discharge pressure detection means, thereby achieving an accurate estimation of the discharge pressure at a low cost. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
