FUME EXTRACTION

A fume extraction apparatus (1) which comprises an extraction pump (6), and the apparatus further comprising a sensor arrangement (12a, 12b, 13) to measure a differential pressure across the pump and to measure a speed of the extraction pump, and the apparatus comprising a controller (10) which comp...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	DOVETON Matthew John, LOCKWOOD Antony Keith
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING FUNCTIONAL ELEMENTS OF SUCH SYSTEMS HEATING LIGHTING MECHANICAL ENGINEERING MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS NON-POSITIVE DISPLACEMENT PUMPS PHYSICS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS REGULATING SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES WEAPONS
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Beschreibung
Zusammenfassung:	A fume extraction apparatus (1) which comprises an extraction pump (6), and the apparatus further comprising a sensor arrangement (12a, 12b, 13) to measure a differential pressure across the pump and to measure a speed of the extraction pump, and the apparatus comprising a controller (10) which comprises a data processor, the data processor arranged to calculate a flow rate of air through the pump using the measurements from the sensor arrangement, and to compare the calculated flow rate to a target flow rate, and the controller arranged to issue a control signal to control the speed of the pump so as to better align the flow rate with the target flow rate.