Blower motor for HVAC systems
First Claim
Patent Images
1. A method for determining proper rotation direction of a reversible motor, the method comprising:
- operating the motor to rotate a fan in a first direction;
monitoring an operating parameter of the motor while the fan is rotated in the first direction;
determining if the monitored operating parameter is within an acceptable range;
determining that the first direction of rotation is not the proper rotation direction where the monitored operating parameter is not within the acceptable range; and
operating the motor to rotate the fan in a second direction if the monitored operating parameter is not within the acceptable range.
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Abstract
A method for determining proper rotation direction of a reversible motor comprises the steps of: operating the motor to rotate a fan in a first direction, monitoring an operating parameter of the motor while the fan is rotated in the first direction, determining if the monitored operating parameter is within an acceptable range, determining that the first direction of rotation is not the proper rotation direction where the monitored operating parameter is not within the acceptable range, and operating the motor to rotate the fan in a second direction if the monitored operating parameter is not within the acceptable range.
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Citations
19 Claims
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1. A method for determining proper rotation direction of a reversible motor, the method comprising:
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operating the motor to rotate a fan in a first direction; monitoring an operating parameter of the motor while the fan is rotated in the first direction; determining if the monitored operating parameter is within an acceptable range; determining that the first direction of rotation is not the proper rotation direction where the monitored operating parameter is not within the acceptable range; and operating the motor to rotate the fan in a second direction if the monitored operating parameter is not within the acceptable range. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for determining proper rotation direction of a blower fan driven by a reversible motor in an HVAC system, the method comprising:
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operating the motor to rotate the fan in a first direction; monitoring an operating parameter of the motor while the fan is rotated in the first direction; monitoring a rotation speed of the fan; determining if the monitored operating parameter is appropriate for the monitored rotation speed; determining that the first direction of rotation is not the proper rotation direction where the monitored operating parameter is not appropriate for the monitored rotation speed; and operating the motor to rotate the fan in a second direction if the monitored operating parameter is not appropriate for the monitored rotation speed. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A blower motor assembly comprising:
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a fan; a reversible variable speed motor and motor controller for rotating the fan in first or second directions; and a sensing circuit for sensing a torque load on the motor while the motor rotates the fan in the first direction; the motor controller being operable for determining whether the monitored torque load is within an acceptable range, for determining that the first direction of rotation is not the proper rotation direction where the monitored torque load is not within the acceptable range, and for rotating the fan in a second direction if the monitored torque is not within the acceptable range. - View Dependent Claims (16, 17, 18, 19)
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Specification