FIELD: vending machines.
SUBSTANCE: vending machines for drinking water obtained from the water of the public water supply network through its multi-stage purification. The method consists in supplying, intermittently, under the appropriate pressure, source water to the inlet of a reverse osmosis membrane, which at the same time separates this water into permeate and concentrate. The permeate obtained as a result of separation is accumulated in a hydraulic accumulator, from which the permeate is dispensed to the permeate consumer at request. The concentrate obtained as a result of separation is sent to the sewer through the hydraulic resistance of the concentrate outlet. With regard to any interruption taken from among the indicated initial water supply interruptions, at the beginning of the interruption, permeate is supplied to the membrane inlet from the hydraulic accumulator. The membrane is filled with permeate, completely or partially displacing the rest of the source water present there. The permeate thereby becomes the internal permeate of the membrane. Upon filling, the supply of permeate to the membrane inlet from the accumulator is stopped and diffusion exposure of the internal permeate of the membrane is carried out. At the end of the break, the exposure of the membrane is terminated.
EFFECT: increased efficiency of non-chemical membrane cleaning (cleaning with permeate) and, as a result, increased duration of its effective operation with the possibility of increasing the degree of permeate yield.
2 cl, 1 dwg
