Automatic prime and flush siphon condensate pump system

Fluid handling – Siphons – Periodic or accumulation responsive discharge

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Details

137140, 137147, 137151, 417 40, F04F 1000

Patent

active

052938948

ABSTRACT:
An automatic prime and flush siphon condensate pump system (100) is provided for displacing condensate water accumulated from an air conditioning evaporator to a drain, such as the drain of a basin (50). Initially, the pump assembly (2) displaces the condensate from the reservoir (1) responsive to the closure of a switch (34) when the condensate level exceeds a predetermined height within reservoir (1). The pump outlet (128) is coupled to the inlet of a pilot operated check valve assembly (3) which is opened responsive to the pressure in the valve chamber (28) exceeding the bias force of the compression spring (33) and a fluid pressure in a reference chamber (29). The pumped condensate exits the pilot operated check valve assembly (3) and is fluidly coupled to the ball-type check valve housing (126) for delivery of the condensate to the passage (18) for fluid coupling with the drain conduit (52). Subsequently, when the level of condensate within the reservoir (1) drops sufficiently such that switch (34 ) opens, condensate is then free to flow through the U-shaped siphon housing (122). The siphon flow is regulated by a flow regulating valve assembly (4), having a valve actuator (10) coupled to the float (5). The siphon flow from the flow regulating valve assembly (4) passes through the passage (130), the passage (13), past the ball check (14), through the check valve chamber (16), and finally through the passage (18) to the drain conduit (52).

REFERENCES:
patent: 2363313 (1944-11-01), Gavin
patent: 2981196 (1961-04-01), Zimmerman et al.
patent: 3753236 (1973-09-01), Zimmerman
patent: 4248258 (1981-02-01), Devitt et al.
patent: 4406300 (1983-09-01), Wilson
patent: 5044391 (1991-09-01), Brumfield

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