Solenoid pinch valve apparatus and method for medical fluid applications having reduced noise production
First Claim
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1. A medical fluid delivery machine comprising:
- a solenoid valve; and
a controller configured to perform a power actuation sequence in which power to the solenoid valve undergoes a plurality of cycles that switch from an actuation power level to a hold power level, wherein the actuation power level is increased at each subsequent cycle, and wherein the actuation power level of at least one of the plurality of cycles is sufficient to fully actuate the solenoid valve.
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Abstract
A low noise solenoid valve system includes a solenoid valve; and a controller configured to perform a power actuation sequence in which power to the solenoid valve undergoes a plurality of cycles that switch from an actuation level power to a hold level power, wherein the actuation level power is increased at each subsequent cycle, and wherein the actuation power level of one of the plurality of cycles is sufficient to fully actuate the solenoid valve.
69 Citations
25 Claims
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1. A medical fluid delivery machine comprising:
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a solenoid valve; and a controller configured to perform a power actuation sequence in which power to the solenoid valve undergoes a plurality of cycles that switch from an actuation power level to a hold power level, wherein the actuation power level is increased at each subsequent cycle, and wherein the actuation power level of at least one of the plurality of cycles is sufficient to fully actuate the solenoid valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for medical fluid delivery comprising:
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providing power to a solenoid valve over a plurality of cycles, including (i) providing power at an actuation power level, (ii) switching from the actuation power level to a hold power level, (iii) repeating (i) and (ii) and increasing, in each subsequent cycle, the actuation power level, and (iv) fully actuating the solenoid valve when the actuation power level of at least one of the plurality of cycles is sufficient to fully actuate the solenoid valve; and delivering medical fluid when the solenoid valve is fully actuated. - View Dependent Claims (23, 24, 25)
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Specification