| 摘要 |
PURPOSE: To stably implement heat exchange of refrigerant by setting revolution speed of a compressor at a specified value, keeping valve travel of an electronic expansion valve at a specified value and adjusting discharge pressure of the refrigerant by controlling valve travel of a hot water flow control valve. CONSTITUTION: Revolution speed of a compressor 2 is set at a specified set value by means of a compressor setting means 5a and an invertor 3 controls the revolution speed of the compressor 2 according to the set value to stabilize discharge pressure of refrigerant. Valve travel of an outdoor side electronic expansion valve 7a is kept at a specified value by an expansion valve setting means 5b so as to adjust circulation amount of the refrigerant. A discharge pressure adjusting means 5c adjusts discharge pressure of the refrigerant by controlling valve travel of a hot water flow control valve 8. In order to utilize discharge pressure of the compressor 2 as an appropriate value each indoor devices 14 can be operated in such a manner as to keep discharge pressure of the compressor 2 at a constant value. |
