Control apparatus for refrigeration system

Claim 1

IN AN AIR CONDITIONING CONTROL SYSTEM, AN EVAPORATOR COIL MOUNTED IN AN AIR STREAM FOR DELIVERING COOLED AIR TO A SPACE, A REMOTE MOTOR COMPRESSOR UNIT, VALVE MEANS HAVING AN ENERGIZATION WINDING, MEANS INCLUDING SAID VALVE MEANS CONNECTING SAID COMPRESSOR TO SAID EVAPORATOR TO FORM A REFRIGERATION SYSTEM TO COOL SAID EVAPORATOR WHEN SAID VALVE IS ENERGIZED, A LOW PRESSURE RESPONSIVE SWITCH MEANS CONNECTED TO SAID REFRIGERATION SYSTEM TO BE RESPONSIVE TO SUCTION PRESSURE OF THE COMPRESSOR, SWITCH MEANS PROVIDING AN OPEN CIRCUIT WHEN SAID SUCTION PRESSURE IS REDUCED TO SAID PREDETERMINED LOW VALUE, A SOURCE OF POWER, A CURRENT OVERLOAD SWITCH MEANS FOR PROVIDING AN OPEN CIRCUIT WHEN AN EXCESSIVE CURRENT FLOWS THROUGH A CURRENT RESPONSIVE CIRCUIT, A CONTROL RELAY HAVING AN ENERGIZATION WINDING AND BEING ADAPTED TO CONNECT SAID MOTOR COMPRESSOR TO SAID SOURCE OF POWER THROUGH SAID RESPONSIVE CIRCUIT, A FIRST RELAY HAVING AN ENERGIZATION WINDING AND A NORMALLY CLOSED SWITCH, A REMOTELY CONTROLLED RESET RELAY HAVING A NORMALLY CLOSED SWITCH AND A NORMALLY OPEN SWITCH, SAID RELAY INSURING A CLOSED CIRCUIT WHEN SAID RESET RELAY IS EITHER ENERGIZED OR DE-ENERGIZED, CIRCUIT MEANS CONNECTING SAID SWITCH OF SAID PRESSURE CONTROL, SAID CONTROL RELAY ENERGIZATION WINDING, SAID FIRST RELAY ENERGIZATION WINDING AND A PARALLEL CONNECTION OF SAID RESET SWITCHES IN SERIES TO SAID SOURCE OF POWER, SPACE TEMPERATURE RESPONSIVE SWITCH MEANS, MEANS INCLUDING SAID SPACE SWITCH MEANS FOR CONNECTING SAID VALVE ENERGIZATION WINDING TO SAID SOURCE OF POWER WHERE UPON A CALL FOR COOLING IN SAID SPACE SAID VALVE IS ENERGIZED AND SAID EVAPORATOR IS COOLED BY SAID REFRIGERATION SYSTEM, ABNORMAL REFRIGERATION OPERATING CONDITION SWITCH MEANS HAVING AN OPEN CIRCUIT WHEN AN ABNORMAL CONDITION IS PRESENT, CIRCUIT MEANS CONNECTING SAID CONDITION SWITCH MEANS AND SAID FIRST RELAY SWITCH IN A SERIES CONNECTION IN PARALLEL WITH SAID FIRST RELAY ENERGIZATION WINDING AND SAID PARALLEL CONNECTION OF SAID RESET SWITCHES, SAID RESET RELAY SWITCHES HAVING A WIDE OPERATING GAP SUCH THAT SAID CLOSED SWITCH OPENS BEFORE SAID OPEN SWITCH CLOSES UPON ENERGIZATION OR DEENERGIZATION OF SAID RESET RELAY, SAID RESET RELAY PROVIDING FOR NORMAL OPERATION OF SAID CONTROL SYSTEM UPON AN ABNORMAL CONDITION OCCURRING TO OPEN SAID ABNORMAL CONDITION SWITCH MEANS AFTER SAID FIRST RELAY HAS BECOME ENERGIZED AND SAID ABNORMAL CONDITION HAS DISAPPEARED TO CLOSE SAID ABNORMAL CONDITION SWITCH MEANS.