Feed control system for pumping fluids to dishwashers and the like
First Claim
1. A feed control system for pumping fluids having linear shear rates and non linear shear rates, separately and to-gether, comprising:
- a. a peristaltic pump for feeding detergent to the dishwasher;
b. an A.C. shaded pole motor for driving the pump, control for actuating the A.C. motor including;
I. a probe for determining concentration of the detergent; and
,II. a turn on circuit actuated by the probe, comprising;
i. an A.C. power supply;
ii. means for pre-setting the turn on circuit for response ta a specific detergent concentration;
iii. a turn on switch for admitting pulses from the probe;
iv. a first bilateral switch for turn on upon actuation by the power supply and pulses from the turn on switch;
v. solenoid means for turning on the dishwasher when the bilateral switch is turned on;
vi. detector means for converting signals from the bilateral switch to a pulse train;
vii. a clock counter for providing pulse signals;
viii. an adjustable timing counter set for correspondance to detergent feed time;
ix. gating means for receiving pulses from the detector means, clock counter and timing counter;
x. a second bilateral switch for turn on by the gating means and A.C. power supply when the probe indicates an excessive detergent feed time determined by setting of the timing counter;
xi. alarm means for actuation by the second bilateral switch;
c. a variable speed, D.C. powered shaded pole motor connected to the A.C. motor, and acting as an electromagnetic brake on the A.C. motor; and
,d. an A.C. to D.C. rectifier for supplying D.C. power to the variable speed motor;
the peristaltic pump being driven by the A.C. motor, whereby a decrease in viscosity of the fluid causes a decrease in rotational force to the constant torque motor and a counterbalancing increase in braking power of the variable speed motor, thereby linearizing the flow of fluid to the peristaltic pump.
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Accused Products
Abstract
A peristaltic detergent feed pump and peristaltic rinse feed pump are employed to supply their respective ingredients to a washing machine, chemical reactor, or the like.
The detergent feed is supplied by a peristaltic pump, and the amount of feed is detected by a sensor such as a conductance probe controlled by a special circuitry means.
The peristaltic rinse feed pump is driven by a shaded pole motor, comprising a constant torque, A.C. drive and a D.C. electromagnetic, shaded pole brake portion.
The net effect of employing a circuit controlled conductance sensor and D.C. brake enables the detergent and rinse ingredients to be fed linearly to the dishwasher.
20 Citations
11 Claims
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1. A feed control system for pumping fluids having linear shear rates and non linear shear rates, separately and to-gether, comprising:
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a. a peristaltic pump for feeding detergent to the dishwasher; b. an A.C. shaded pole motor for driving the pump, control for actuating the A.C. motor including; I. a probe for determining concentration of the detergent; and
,II. a turn on circuit actuated by the probe, comprising; i. an A.C. power supply; ii. means for pre-setting the turn on circuit for response ta a specific detergent concentration; iii. a turn on switch for admitting pulses from the probe; iv. a first bilateral switch for turn on upon actuation by the power supply and pulses from the turn on switch; v. solenoid means for turning on the dishwasher when the bilateral switch is turned on; vi. detector means for converting signals from the bilateral switch to a pulse train; vii. a clock counter for providing pulse signals; viii. an adjustable timing counter set for correspondance to detergent feed time; ix. gating means for receiving pulses from the detector means, clock counter and timing counter; x. a second bilateral switch for turn on by the gating means and A.C. power supply when the probe indicates an excessive detergent feed time determined by setting of the timing counter; xi. alarm means for actuation by the second bilateral switch; c. a variable speed, D.C. powered shaded pole motor connected to the A.C. motor, and acting as an electromagnetic brake on the A.C. motor; and
,d. an A.C. to D.C. rectifier for supplying D.C. power to the variable speed motor; the peristaltic pump being driven by the A.C. motor, whereby a decrease in viscosity of the fluid causes a decrease in rotational force to the constant torque motor and a counterbalancing increase in braking power of the variable speed motor, thereby linearizing the flow of fluid to the peristaltic pump. - View Dependent Claims (2, 3, 4, 5)
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6. A turn on circuit for actuation of a device by signals derived from a concentration probe, including:
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I. a probe for determining concentration of a liquid; and
,II. a turn on circuit actuated by the probe, comprising; i. an A.C. power supply; ii. means for pre-setting the turn on circuit for response to a specific liquid concentration; iii. a turn on switch for admitting pulses from the probe; iv. a first bilateral switch for turn on upon actuation by the power supply and pulses from the turn on switch; v. solenoid means for turning on the device when the bilateral switch is turned on; vi. detector means for converting signals from the bilateral switch to a pulse train; vii. a clock counter for providing pulse signals; viii. an adjustable timing counter set for correspondance to liquid feed time; ix. gating means for receiving pulses from the detector means, clock counter and timing counter; x. a second bilateral switch for turn on by the gating means and A.C. power supply when the probe indicates an excessive liquid feed time determined by setting of the timing counter; and
,xi. alarm means for actuation by the second bilateral switch. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification