Condensate overflow control for furnace

Patent · Tue Jul 28 04:00:00 EDT 1987

OSTI ID:6382001

Bigham, D L

This patent describes a domestic forced air condensing furnace including a blower for forcing all of the combustion products and condensate to an outlet conduit. The outlet conduit connects to a condensate trap and a vent, and a pressure sensor to detect the negative pressure created by the blower and a decrease in the negative pressure cause by a vent blockage. The improvement comprises: a float means positioned in the condensate trap arranged to block the outlet conduit when the condensate in the trap increases to an undesirable level and to remain clear of the outlet conduit when the condensate level is below the undesirable level; the pressure sensor detects a rise in the condensate level when it reaches the undesirable level due to blockage of the outlet conduit by the float means.

• Assignee: Heil-Quaker Corp., La Vergne, TN
• Patent Number(s): US 4682579
• OSTI ID: 6382001
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
AIR FLOW
BLOWERS
BUILDINGS
BURNERS
COMBUSTION PRODUCTS
CONDENSATES
FLOW BLOCKAGE
FLUID FLOW
FURNACES
GAS FLOW
HEAT EXCHANGERS
LEVEL INDICATORS
MEASURING INSTRUMENTS
MONITORS
POSITIONING
PRESSURE EFFECTS
PRESSURE GAGES
RESIDENTIAL BUILDINGS
STEAM TRAPS
TRAPS
VENTS