Control of cleaning of dialysate preparation apparatus

Details Control of cleaning of dialysate preparation apparatus Control of cleaning of dialysate preparation apparatus

1986-10-30

1989-08-15

Jones, W. Gary

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

134166C, 134171, 21032169, B01D 1300

Patent

active

048571814

ABSTRACT:
Dialysate preparation apparatus having a main flow line having one end for connection to a source of water and another end for providing dialysate to a dialyzer, a concentrate flow line having one end connected to a junction on the main flow line and another end with a connector for alternatively connecting the concentrate line to a source of dialysate concentrate or a source of cleaning fluid, a source of dialysate connectable to the connector, a source of cleaning fluid having a cleaning fluid flow line with an end that is connectable to the connector, a flow sensing switch on the cleaning fluid flow line, and a controller connected to receive a signal from the switch to verify that the apparatus is in a cleaning mode when the switch indicates fluid flowing in the flow line. Also disclosed is a controller providing an initial backflush prior to pumping cleaning fluid into the apparatus in order to provide a water interface between the dialysate and the incoming cleaning fluid.

REFERENCES:
patent: 3753493 (1973-08-01), Mellor
patent: 3871913 (1975-03-01), Shaldon
patent: 4158034 (1979-06-01), Riede et al.
patent: 4166031 (1979-08-01), Hardy
patent: 4209402 (1980-06-01), Gentles
patent: 4361485 (1982-11-01), Boonstra
patent: 4371385 (1983-02-01), Johnson
patent: 4411866 (1983-10-01), Kanno
patent: 4444597 (1984-04-01), Gortz et al.

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