Positive displacement pump and operating method thereof

1. An operating method for a positive displacement pump provided as a piston diaphragm pump, the operating method comprising:

providing a positive displacement pump configured to be double-acting, the positive displacement pump comprising:

a drive unit, and

a pump unit comprising:

a plurality of working chambers,

at least three cylinders which each comprise a piston,

a plurality of displacement elements comprising diaphragms configured to be actuated by the pistons, the diaphragms each comprising a first side and a second side,

a diaphragm chamber bounded by the second side, the diaphragm chamber being separated from a working volume containing the working liquid by the diaphragm, and

a channel extending upward at an angle of from 1° to 80° from each of the at least three cylinders when viewed from a side view perpendicular to the at least three cylinders when arranged horizontally, the working volume being formed in part by the channel,

providing a working liquid on the first side of each of the diaphragms;

providing a diaphragm stroke via the working liquid; and

conducting a medium to be pumped through the diaphragm chamber via the diaphragm stroke;

wherein, the diaphragm stroke is provided at a diaphragm position different from a vertical position of the diaphragm.

2. The operating method as recited in claim 1 , wherein the diaphragm stroke is provided at a diaphragm position which is 45° to 80° different from a vertical position of the diaphragm.

3. The operating method as recited in claim 2 , wherein the diaphragm stroke is provided at a diaphragm position which is approximately 70° different from a vertical position of the diaphragm.

4. A positive displacement pump designed as a piston diaphragm pump, the positive displacement pump comprising:

a diaphragm arranged in a non-vertical position;

a diaphragm chamber through which a medium to be pumped is conducted;

a cylinder;

a piston arranged in the cylinder and configured to perform an oscillating movement therein, the oscillating movement of the piston being transmittable to the diaphragm via a working fluid; and

a channel extending upward at an angle of from 1° to 80° from the cylinder when viewed from a side view perpendicular to the cylinder when arranged horizontally,

wherein,

the diaphragm separates a working volume containing the working liquid from the diaphragm chamber,

the working volume is formed in part by the channel.

5. The piston diaphragm pump as recited in claim 4 , wherein the non-vertical position of the diaphragm is 45° to 80° different from a vertical position of the diaphragm.

6. The piston diaphragm pump as recited in claim 4 , wherein the non-vertical position of the diaphragm is approximately 70° different from a vertical position of the diaphragm.

7. The piston diaphragm pump as recited in claim 4 , wherein a longitudinal axis of the cylinder is arranged so as to be approximately horizontal.

8. The piston diaphragm pump as recited in claim 4 , wherein the channel comprises a channel housing, and further comprising a diaphragm housing configured to receive the diaphragm, and a flange arranged in the channel housing, the flange being arranged to be approximately perpendicular to a longitudinal axis of the channel, and the diaphragm housing being attached to the flange.

9. The piston diaphragm pump as recited in claim 8 , wherein the diaphragm comprises an edge region configured to be clamped in the diaphragm housing approximately in a plane.

10. The piston diaphragm pump as recited in claim 9 , wherein the plane is arranged at an angle which is 45° to 80° different from a vertical position of the diaphragm.

11. The piston diaphragm pump as recited in claim 9 , wherein the diaphragm further comprises a lateral edge region, and the plane is arranged at an angle so that a highest point of the working volume is formed on the lateral edge region.

12. The piston diaphragm pump as recited in claim 9 , wherein the diaphragm comprises a shape which is approximately circular.