Control systems

• US 3,204,423 A
• Filed: 09/25/1963
• Issued: 09/07/1965
• Est. Priority Date: 09/25/1963
• Status: Expired due to Term

• Current Assignee: Roy E. Resh Jr
• Original Assignee: Roy E. Resh Jr
• Inventors: Resh, Roy E. Jr.
• Application Number:
  US04/311,455
• Time in Patent Office: 713 Days
• US Class Current: 62/209
• CPC Class Codes: F25B 1/053 of turbine type
• CPC Class Codes: F25B 2339/0242 having tubular elements
• CPC Class Codes: F25B 2339/047 Water-cooled condensers
• CPC Class Codes: F25B 2700/151 of the compressor motor
• CPC Class Codes: F25B 2700/21172 at the inlet
• CPC Class Codes: F25B 2700/21173 at the outlet

Claims

14. A REFRIGERATION SYSTEM COMPRISING:

A CENTRIFUGAL COMPRESSOR CONNECTED TO COMPRESS REFRIGERANT IN A REFRIGERATION CIRCUIT;

AN ELECTRIC MOTOR CONNECTED FOR DRIVING SAID CENTRIFUGAL COMPRESSOR;

REFRIGERANT THROTTLING MEANS FOR REDUCING THE LOAD ON SAID ELECTRIC MOTOR;

A SHADED POLE MOTOR CONNECTED TO CONTROL SAID REFRIGERANT THROTTLING MEANS, SAID SHADED POLE MOTOR HAVING AT LEAST ONE SHADING WINDING FOR CONTROLLING THE OPERATION THEREOF;

SENSING MEANS FOR SENSING A LOAD ON SAID MOTOR;

AND SAID SENSING MEANS BEING CONNECTED IN AN ELECTRICAL CIRCUIT SO AS TO ELECTRICALLY LOAD OR UNLOAD SAID SHADING WINDING IN A MANNER TO CONTROL SAID REFRIGERANT THROTTLING MEANS TO REDUCE THE LOAD ON SAID COM-U PRESSOR MOTOR WHEN SAID MOTOR APPROACHES A PREDETERMINED LOAD CONDITION.