FIELD: vending machines.
SUBSTANCE: vending machines for drinking water obtained from water of the public water supply network by its multi-stage purification using a reverse osmosis membrane. The module of the water vending machine designed to implement the method of drinking water vending comprises reverse osmosis membrane 1 with outlets for permeate 2 and concentrate 3, booster pump 4, control valve 5, shut-off valve 6, flow resistor 7, drain pipe 8, modifier 9, hydraulic accumulator 10, supply pump 11, primary thermoelectric converter 12, temperature controller 13, electric key 14 included in the break in the power circuit 15 of pump 4. In the process of water vending, the resulting drinking water is accumulated in hydraulic accumulator 10, from which drinking water is dispensed to the water buyer. As a booster pump, diaphragm pump 4 with a low-voltage electric drive is used, which is not designed for continuous operation. Each dispensing of drinking water from accumulator 10 is compensated by the process of replenishing accumulator 10 with new drinking water, triggered by said dispensing. Replenishment is carried out either by creating pressure at the inlet of membrane 1 by diaphragm pump 4, if the temperature of its body is less than the specified maximum allowable value, or by using water pressure in the public water supply network if the temperature of its body is equal to or exceeds the specified maximum allowable value. If in the process of dispensing drinking water to the buyer of water, the temperature of the housing of diaphragm pump 4 rises and reaches the specified maximum allowable value, its operation is forcibly stopped and at the same time it is prohibited to turn it on until the temperature of its housing decreases reaching the specified minimum allowable value, upon which the diaphragm pump can be turned on.
EFFECT: automatic formation of additional breaks in the operation of the diaphragm pump, the frequency and duration of which is a function of both the frequency of dispensing drinking water from the accumulator and the temperature changes of this diaphragm pump, which is not intended for continuous operation.
2 cl
