FIELD: heating.
SUBSTANCE: invention deals with a method of purging heat exchanger tubes with a fluidic agent and a device for the proposed method implementation. Under the proposed purging method a jet nozzle is put against the heat exchanger tube and a flux of air containing the fluidic agent is blown through the tube. The proposed method specificity consists in the jet nozzle with its outlet throughhole being not inserted inside the tube but tightly pressed against the tube end butt side with a thrust surface surrounding the outlet throughhole. The design solution typical of the jet device proposed for the method implementation is that of it being equipped with a jet nozzle whose outlet throughhole is surrounded by a thrust surface positioned within the hole plane and interacting with the butt side of the tune being purged, the outlet throughhole cross-section area corresponding to the area of the inner cross-section of the tube being purged. With the help of the device jet nozzle a flux of air containing the fluidic agent is to be blown through the heat exchanger tube having an inner diametre. The jet nozzle is designed to enable connection to a supply hose therethrough the fluidic agent flux is delivered and has a supply channel arranged in it therethrough the fluidic agent flux may flow. The jet nozzle design is basically as follows: the jet nozzle contains a housing whose first end is positioned as opposed to the second one, the two ends limiting the flow channel that stretches between the two ends. The first end has an inlet throughhole arranged in it therethrough the fluidic agent flux may be delivered from the supply hose; the first end has an outlet throughhole arranged in it therethrough the fluidic agent flux may be discharged from the nozzle. The flow channel has its first diametre within the inlet throughhole zone and its second diametre - within the outlet throughhole zone. The second diametre corresponds to the heat exchanger tube inner diametre with the first diametre approximately equal to the second one. Additionally proposed is a jet head providing for the air flux being blown through multiple tubes at a time as well as a method of tube purging envisaging application of a fluidic agent flux containing a fluidic agent and blown through the supply hose.
EFFECT: purging efficiency improvement.
51 cl, 5 dwg
