Diaphragm vacuum pump

摘要

A diaphragm vacuum pump has an electrically operated drive unit and a vacuum diaphragm, which separates a pump chamber into a drive-side part and a drive-remote part and which can be deflected by means of a movable part of the drive unit. The drive unit is an electromagnetic drive unit and the vacuum diaphragm is deflected in the direction of a linear movement generated electromagnetically in the drive unit. Preferably, a ventilation valve is also actuated the movable part. The vacuum pump is relatively small and compact and operates quietly. The vacuum pump is suitable in particular for “hands-free” applications of breastpumps.

主权项

1. A diaphragm vacuum pump with an electrically operated drive unit and a vacuum diaphragm, the vacuum diaphragm separating a pump chamber into a drive-side part and a drive-remote part, wherein the vacuum diaphragm can be deflected by a movable part of the drive unit, wherein the drive unit is an electromagnetic drive unit, wherein the movement of the movable part is a linear movement and wherein the vacuum diaphragm is deflected in the direction of the linear movement which is generated electromagnetically in the drive unit, wherein the movable part is operatively connected to a ventilation valve for ventilating the diaphragm vacuum pump, wherein the ventilation valve has a ventilation diaphragm, wherein the vacuum diaphragm is fixedly connected to a first end of the movable part and the ventilation diaphragm is fixedly connected to a second end of the movable part, and wherein the vacuum diaphragm and the ventilation diaphragm form a mounting of the movable part within the drive unit, wherein the linear movement generated in the drive unit actuates the ventilation valve and wherein the movable part is movable by a controller in a first and a second stroke in order to generate a vacuum in the pump chamber, and is movable in a third stroke in order to actuate the ventilation valve, and wherein the third stroke is in the same direction of the second stroke and is larger than the second stroke.