Heat source system

Abstract

Abstract PURPOSE: To provide a heat source system, in which a compressor driving motor is driven with variable output by use of inverter, and restriction on driving torque or starting and stopping of operation is achieved through detection of gas pressure of the compressor, whereby overloading of the compressor can be prevented and thus efficiency of operation can be improved. CONSTITUTION: Chopper controlling circuit 42 of inverter 15 is arranged such that it controls the operation of compressor 3 to suit the operating torque characteristics of compressor 3, by use of output current Ic at chopper section 20 and differential pressure signal Vp afforded by pressure detector 9. On the other hand, differential pressure Δ P of cooling medium at the outlet and inlet sides of compressor 3 is detected by the pressure detector 9. When the differential pressure signal Vp almost exceeds a predetermined value, speed insturction signal Vs given to control circuit 42 is lowered whereby set values for rotational speed of motor 4 and compressor 3 are lowered so as not to exceed the torque characteristics TCE. With such an arrangement, overloaded operation of the compressor system can be prevented and resultantly efficiency of operation can be improved. COPYRIGHT: (C)1979,JPO&Japio

Inventors

• 👤 Isamu Okuda
• 👤 Hiroshi Horii

Bibliographic Details