Technique for preventing air lock through stuttered starting and air release slit for pumps
First Claim
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1. A stutter start anti-air lock system comprising:
- a pump having an impeller housing configured with a slit at the top for trapped air to leave the pump once the pump has been submerged in a liquid and the impeller housing contains an air/liquid mixture; and
a control circuit configured to initiate a start-up process upon powering the pump to provide signaling to implement an anti air-lock on/off start-up cycle to cycle the pump on and off for a predetermined number of cycles, wherein trapped air not previously expelled once the pump has been submerged will float to the top and be expelled out the slit when the pump is cycled off,the control circuit also configured, once the start-up process is complete, to leave the pump on after the predetermined number of cycles until the pump is powered off,wherein the pump is configured with a motor coupled to an impeller via a shaft; and
wherein a discharge from the impeller housing is a tangential discharge, the tangential discharge extending away from the impeller housing below a central axis of the shaft.
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Abstract
Apparatus, including a pumping system, is provided featuring a pump and a control circuit. The pump has an impeller housing configured with a slit at the top for trapped air to leave the impeller housing once the pump has been submerged. The control circuit is configured to cycle the pump on and off for a predetermined number of cycles so that the trapped air will float to the top and be expelled out the slit when the pump is cycled off. The control circuit is configured to leave the pump on after the predetermined number of cycles.
53 Citations
14 Claims
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1. A stutter start anti-air lock system comprising:
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a pump having an impeller housing configured with a slit at the top for trapped air to leave the pump once the pump has been submerged in a liquid and the impeller housing contains an air/liquid mixture; and a control circuit configured to initiate a start-up process upon powering the pump to provide signaling to implement an anti air-lock on/off start-up cycle to cycle the pump on and off for a predetermined number of cycles, wherein trapped air not previously expelled once the pump has been submerged will float to the top and be expelled out the slit when the pump is cycled off, the control circuit also configured, once the start-up process is complete, to leave the pump on after the predetermined number of cycles until the pump is powered off, wherein the pump is configured with a motor coupled to an impeller via a shaft; and wherein a discharge from the impeller housing is a tangential discharge, the tangential discharge extending away from the impeller housing below a central axis of the shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification