Compressor reset delay circuit

Abstract

Abstract AN ELECTRIC MOTOR DRIVEN REFRIGERATING SYSTEM FOR AIR CONDITIONING A ROOM OR THE LIKE IS CONTROLLED BY A SOLENOID OPERATED CONTRACTOR. THE SOLENOID CIRCUIT IS CONTROLLED BY A THERMOSTATIC SWITCH, SUBJECTED TO THE AIR OF THE ROOM, AND A REFRIGERANT HEAD PRESSURE OPERATED SWITCH SO THAT THE SOLENOID IS ENERGIZED BY CLOSING OF THE THERMOSTATIC SWITCH ONLY IN THE EVENT A RELATIVELY LOW HEAD PRESSURE EXISTS IN THE REFRIGERATING SYSTEM. THE PRESSURE SWITCH IS SHUNTED OUT OF THE SOLENOID CONTROL CIRCUIT BY A HOLDING CIRCUIT CLOSED BY THE SOLENOID DURING NORMAL OPERATING REFRIGERANT PRESSURES AT WHICH THE SWITCH IS OPEN. TO PREVENT INTERRUPTION OF THE SOLENOID CIRCUIT BY POSSIBLE "CHATTERING" OF THE THERMOSTATIC SWITCH CONTACTS DURING INITIAL CLOSURE THEREOF, THE SOLENOID HOLDING CIRCUIT IS SHUNTED AROUND THE THERMOSTATIC SWITCH BY A PRESSURE OPERATED DOUBLE THROW SWITCH T RELATIVELY LOW REFRIGERANT PRESSURES AND OPERATES UPON ATTAINMENT OF A NORMAL REFRIGERANT PRESSURE IN THE SYSTEM TO CONNECT THE THERMOSTATIC SWITCH IN SERIES WITH THE SOLENOID CIRCUIT.

Inventors

• 👤 Clyde L Young

Bibliographic Details