1. A suction pump with a vacuum port, an overpressure port and a switching valve (2, 9), which contains the valve body (20, 21, 95) with two inlets (22, 23； 950, 951), while: the first inlet ( 22, 950) is connected to a vacuum port, and the second inlet (23, 951) is connected to an overpressure port； the switching valve (2, 9) contains an output element (26, 96) with a through hole that can move relative to the inlets (22, 23 ； 950, 951) from the first inlet (22, 950) to the second inlet (23, 951) and vice versa, providing a through hole with the possibility of establishing a fluid communication de in turn with each of the inputs (22, 23； 950, 951), characterized in that it is made with the possibility of releasing and venting the through hole of the specified output element (26, 96) at least on a part of the trajectory of its movement between the two inputs (22, 23； 950, 951) .2. The pump according to claim 1, in which the output element (26, 96) is made with the possibility of lifting relative to the two inputs (22, 23； 950, 951) during its movement between the inputs with the release and ventilation of the through hole of the output element (26, 96 ) in its raised position. 3. A pump according to claim 1, wherein the valve body (20, 21, 95) is fixed in the pump, and the valve output element (26, 96) is capable of moving. A pump according to claim 1, in which the movement of the output element (26, 96) relative to the two inputs (22, 23； 950, 951) is a combination of rectilinear movement in the first direction and lifting in the second direction perpendicular to the first. A pump according to claim 1, wherein an output line (4) of the suction pump is connected to the output element (26, 96), capable of moving with the output element (26, 96) .6. A pump according to claim 1, comprising a single vacuum pump (1), equipped with a vacuum port and further comprising an exhaust port forming a port of1. Отсасывающий насос с вакуумным портом, портом избыточного давления и
