JAMES A ONEIL
Engineering in Bedford, MA
License number
Massachusetts 21239
Issued Date
Apr 28, 1967
Expiration Date
Jun 30, 2006
Type
Mechanical Engineer
Address
Address
Bedford, MA 01730
Professional information
Refrigeration System Pressure Control Using A Gas Volume
US Patent:
6530237, Mar 11, 2003
Filed:
Apr 2, 2001
Appl. No.:
09/824530
Inventors:
Douglas H. Morse - Millis MA
James A. ONeil - Bedford MA
James A. ONeil - Bedford MA
Assignee:
Helix Technology Corporation - Mansfield MA
International Classification:
F25B 4500
US Classification:
62149, 622283
Abstract:
An apparatus and method are provided for controlling a system pressure in a refrigeration system based on a variable load, which includes sensing return pressure and high side pressure in the system, and adjusting the low pressure to optimize a gas flow rate in the system by adding or removing gas from the system through an operating range of pressures in response to the sensed return pressure and the sensed high side pressure. The method further includes calculating a pressure difference between the return pressure and the high side pressure. A second pressure difference is calculated, and if the pressure difference decreases, gas is added to system and if the pressure difference increases, gas is removed from the system.