Electrostatic air cleaning system with air flow sensor
First Claim
1. An air cleaning system comprising:
- an air cleaner for use in an air duct;
an air flow sensor circuit including an air flow sensor, said circuit connected to the air cleaner and having means for connecting the sensor to a power supply, said sensor providing a signal in response to airflow through the air duct; and
switching means connected to the air flow sensor circuit and the air cleaner for controlling the power supply to the air cleaner in response to the signal provided by the sensor, the switching means supplying power to the air cleaner from the power supply when either the sensor or the circuit is disabled.
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Accused Products
Abstract
The electrostatic air cleaning system is mounted in a duct of a residential or commercial heating and cooling system to remove particles from the circulating air. The electrostatic air cleaning system includes an air flow sensor which turns the air cleaner off in response to the lack of air flow through the air duct. An air flow sensor circuit connected to the electrostatic air cleaner includes a thermistor which detects the lack of air flow in the duct and provides a signal in response to lack of airflow. The signal from the sensor causes the power supply to the electrostatic air cleaner to be disconnected when there is insufficient air flow through the air duct. The air flow sensor circuit is configured so that power will continue to be supplied to the electrostatic air cleaner from the power supply when the sensor is disabled for a variety of reasons. In this way, the electrostatic air cleaning system addresses the problems of the prior art by providing an air cleaning system with an air flow responsive sensor in which the disabling of the sensor does not deactivate the electrostatic air cleaner.
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Citations
18 Claims
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1. An air cleaning system comprising:
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an air cleaner for use in an air duct; an air flow sensor circuit including an air flow sensor, said circuit connected to the air cleaner and having means for connecting the sensor to a power supply, said sensor providing a signal in response to airflow through the air duct; and switching means connected to the air flow sensor circuit and the air cleaner for controlling the power supply to the air cleaner in response to the signal provided by the sensor, the switching means supplying power to the air cleaner from the power supply when either the sensor or the circuit is disabled. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An air cleaner control system comprising:
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an air cleaner; means for generating a high signal in the absence of an air flow and for generating a low signal in the presence of an air flow, wherein the means for generating high and low signals includes a means for producing an airflow sensor signal voltage and a comparator which compares said airflow sensor signal voltage to a predetermined reference signal voltage; and means responsive to the generating means for supplying power to the air cleaner when a low signal is generated by the generating means. - View Dependent Claims (16, 17, 18)
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Specification