Compressor intercooler unloader arrangement

Details Compressor intercooler unloader arrangement Compressor intercooler unloader arrangement

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 39/06 (2006.01) F04B 25/00 (2006.01)

Patent

CA 2242076

Apparatus for rapidly unloading air pressure in an intercooler to atmosphere when a compressor pneumatically connected to the intercooler is unloaded. The apparatus includes a governor pneumatically connected to a reservoir, that, in turn, is connected to receive pressurized air from the air compressor. The governor has a pressure sensing device operable to order unloading of the compressor when air pressure level in the reservoir tank reaches a preset level. An electrically operated valve is pneumatically connected to the intercooler and connected electrically to the pressure sensing device of the governor, with the electrically operated valve being effective to exhaust air pressure in the intercooler when the valve receives an unload signal from the pressure sensing device. The compressor is driven by an electrical motor having one or more speed configurations, with transition occurring between one configuration and another when the compressor is unloaded. The electrically operated valve is effective to unload the intercooler at the time of speed configuration transition to reduce undue motor and electrical contactor heat and thus increase life expectancy of the motor and contactors.

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