Multi-channel pump and its control method
First Claim
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1. A multi-channel pump comprising:
- a pump chamber, an inflow passage for fluid which is connected to the pump chamber, two or more outflow passages which are connected to the pump chamber, outflow side active valves which are provided so as to correspond to the outflow passages; and
a movable body which is reciprocated to change a volumetric capacity of the pump chamber.
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Abstract
A multi-channel pump includes a pump chamber, an inflow passage connected to the pump chamber, two or more outflow passages connected to the pump chamber, outflow side active valves provided so as to correspond to the outflow passages, and a movable body reciprocated to change a volumetric capacity of the pump chamber. The movable body may be a piston reciprocated within a cylinder that is connected to the pump chamber. A control method for a multi-channel pump includes an initial discharge step between a suction step and a discharge step.
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Citations
13 Claims
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1. A multi-channel pump comprising:
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a pump chamber, an inflow passage for fluid which is connected to the pump chamber, two or more outflow passages which are connected to the pump chamber, outflow side active valves which are provided so as to correspond to the outflow passages; and
a movable body which is reciprocated to change a volumetric capacity of the pump chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A control method for a multi-channel pump comprising:
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providing a multi-channel pump comprising;
a pump chamber, an inflow passage for fluid which is connected to the pump chamber, two or more outflow passages which are connected to the pump chamber, outflow side active valves which are provided so as to correspond to the outflow passages;
a movable body which is reciprocated to change a volumetric capacity of the pump chamber, and an inflow side active valve through which the inflow passage is connected to the pump chamber, a suction step in which the inflow side active valve is opened and the fluid is sucked into the pump chamber by a suction operation of the movable body and then the inflow side active valve is closed;
an initial discharge step after the suction step in which one of the outflow side active valves is opened and the fluid is discharged from the pump chamber by the discharge operation of the movable body to eliminate backlash of the pump, and a discharge step after the initial discharge step in which a prescribed outflow side active valve is successively opened and a prescribed amount of the fluid is discharged by the discharge operation of the movable body.
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13. A control method for a multi-channel pump comprising:
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providing a multi-channel pump comprising;
a pump chamber, an inflow passage for fluid which is connected to the pump chamber, two or more outflow passages which are connected to the pump chamber, outflow side active valves which are provided so as to correspond to the outflow passages;
a movable body which is reciprocated to change a volumetric capacity of the pump chamber, a first flow passage provided in the inflow passage and having a passive valve which is capable of opening in an inflow direction to the pump chamber, a second flow passage provided in the inflow passage and having a passive valve which is capable of opening in an outflow direction from the pump chamber, and an inflow side active valve through which the inflow passage is connected to the pump chamber, a suction step in which the inflow side active valve is opened and the fluid is sucked into the pump chamber from the first flow passage by a suction operation of the movable body;
an initial discharge step after the suction step in which the backlash of the pump is eliminated by means of that the fluid is discharged from the pump chamber to the second flow passage by the discharge operation of the movable body and then the inflow side active valve is closed, and a discharge step after the initial discharge step in which a prescribed outflow side active valve is successively opened and a prescribed amount of the fluid is discharged by the discharge operation of the movable body.
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Specification