William J Blackmon

US Patent:

52612465, Nov 16, 1993

Filed:

Oct 7, 1992

Appl. No.:

7/957580

Inventors:

John G. Blackmon - Charlotte NC
William S. Blackmon - Charlotte NC

International Classification:

F25B 4700

US Classification:

62 85

Abstract:

A purge apparatus for removing foreign non-condensable gases from a refrigeration system including a closed purge chamber adapted to receive the foreign gases together with a portion of the refrigerant from the high pressure region of the system. The purge chamber is cooled to condense the refrigerant, and a float actuated electrical switch is provided within the purge chamber to open a first valve for discharging the condensed refrigerant back to the evaporator of the refrigeration system upon the refrigerant reaching a predetermined level, and open a second valve for venting the non-condensable gases to the atmosphere through a gas discharge line upon a drop in the refrigerant level. A heated gas separating tank is positioned in the gas discharge line, which serves to separate any gaseous refrigerant entrained with the contaminating non-condensable gases and cause the gaseous refrigerant to be returned to the cool purge chamber where they may be condensed.

US Patent:

55156908, May 14, 1996

Filed:

Feb 13, 1995

Appl. No.:

8/388219

Inventors:

William S. Blackmon - Charlotte NC
John G. Blackmon - Charlotte NC

Assignee:

Carolina Products, Inc. - Charlotte NC

International Classification:

F25B 4700

US Classification:

62 85

Abstract:

A purge supplement includes a vessel that attaches to a gas discharge line of a purge system. Adsorbent material is disposed within the vessel. In a Vent Mode the purge system vents into the vessel and the vessel vents to the atmosphere, whereby the purge system effectively vents through the vessel and the adsorbent material in the vessel adsorbs refrigerant. The purge supplement senses, by employing a weight scale or a refrigerant detection monitor, when the adsorbent material has adsorbed a certain amount of refrigerant, and at that time operation of the purge supplement switches from the Vent Mode to a Recycle Mode. When the transition is made to the Recycle Mode the vessel is isolated from the purge system and, after a slight delay, the atmosphere. After the slight time delay, the vessel is placed in fluid communication with an evaporator of a refrigeration system that the purge supplement is associated with. Refrigerant is drawn out of the adsorbent material and into the evaporator.

US Patent:

53138058, May 24, 1994

Filed:

Mar 8, 1993

Appl. No.:

8/027708

Inventors:

William S. Blackmon - Charlotte NC
John G. Blackmon - Charlotte NC

Assignee:

Carolina Products, Inc. - Charlotte NC

International Classification:

F25B 4304

US Classification:

62195

Abstract:

Provided is a purge apparatus for removing foreign non-condensable gases from a refrigeration system. The purge apparatus includes a closed purge chamber adapted to receive foreign gases together with a portion of the refrigerant from the high pressure region of the refrigeration system. The purge chamber is cooled to condense the refrigerant. During a Purge Mode, the purge chamber is isolated from the refrigeration system, and gases and a portion of the refrigerant in the purge chamber are vented to a gas separation tank. Adsorbent material in the gas separation tank adsorbs refrigerant and the other gasses are vented from the gas separation tank to the atmosphere. During a Quiet Mode, condensed refrigerant is drawn from the purge chamber to the low pressure portion of the refrigerant system, and a vacuum is drawn on the gas separation tank and the gas separation tank is heated to draw refrigerant from the adsorbent material. The gas separation tank is heated by a coil through which gasses from the high pressure portion of the refrigeration system pass on their way to the purge chamber, where the gasses are further cooled. Thus, an energy efficient heat source that is essentially free is utilized to heat the gas separation tank.