Controlling vacuum level with a two-level vacuum system controll

Details Controlling vacuum level with a two-level vacuum system controll Controlling vacuum level with a two-level vacuum system controll

1992-06-29

1994-02-08

Hepperle, Stephen M.

Fluid handling

Line condition change responsive valves

Pilot or servo controlled

119 1444, 137907, G05D 1616

Patent

active

052841804

ABSTRACT:
A low-energy-consuming apparatus and method for controlling vacuum levels in machine milking and other vacuum systems subject to air leakage utilizes in combination a high vacuum reserve, a low-vacuum end (pipelines), a dual vacuum controller positioned between the high-vacuum reserve and the low-vacuum end and an adjustable speed drive (ASD) motor on a vacuum pump to regulate the delivered air to match the air usage in the low-vacuum end. The dual vacuum controller senses vacuum disturbances in the low-vacuum end and adjusts the flow rate of air from the low-vacuum end to the high-vacuum reserve rather than using external air makeup, thus providing a controlled vacuum with minimum pressure variance and energy input. Energy savings and demand reduction of about 50 percent (50%) during milking are realized under the new system.

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