FRANCIS A KIMPEL SR
Engineers in York, PA
License number
Pennsylvania PE010385E
Category
Engineers
Type
Professional Engineer
Address
Address
York, PA 17402
Professional information
Head Pressure Control System For Refrigeration Apparatus
US Patent:
4120173, Oct 17, 1978
Filed:
Jun 2, 1977
Appl. No.:
5/802689
Inventors:
Francis Alfred Kimpel - York PA
Assignee:
Borg-Warner Corporation - Chicago IL
International Classification:
F25B 3904
US Classification:
62181
Abstract:
Constant condenser pressure is maintained in an air-cooled condenser of a refrigeration system which operates at either full capacity or reduced capacity depending on the heat load requirements. When operating at full capacity, the condenser head pressure will be held generally constant at a relatively high control point even in the presence of wide variations in condenser cooling air temperature. On the other hand, when the heat load requirements decrease and the refrigeration system switches to its reduced capacity operating mode, the control point automatically drops to a substantially lower level, whereupon the condenser pressure is maintained relatively fixed at that lower control point despite major changes in the condenser cooling air temperature. By automatically lowering the control point at reduced system capacity, maximum efficiency and economical operation are obtained.
Heating-Cooling Control System
US Patent:
4083397, Apr 11, 1978
Filed:
Jul 6, 1976
Appl. No.:
5/702789
Inventors:
Francis A. Kimpel - York PA
Walter C. Moore - York PA
Walter C. Moore - York PA
Assignee:
Borg-Warner Corporation - Chicago IL
International Classification:
H01H 3752, F25B 2900
US Classification:
165 26
Abstract:
Thermostat control of separate heating and cooling apparatus is achieved with a system that requires only a two-conductor connection between the thermostat and the apparatus. A pair of oppositely-poled diodes is employed at each end of one of the conductors of the connection so that when the control system is established, by a selector switch, in the heating mode the half cycles of one polarity of an AC voltage effect the operation of the heating apparatus, whereas when the system is switched to the cooling mode the opposite polarity half cycles cause operation of the cooling apparatus. The invention is especially advantageous when a central air-conditioning system is added to a building where only a two-wire cable connects the thermostat to the existing heating system. Rewiring of the thermostat cable is unnecessary.