Multitemperature responsive coolant coil fan control and method
First Claim
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1. In an air cooling system having a coolant coil and a coolant coil fan, the improvement being a multitemperature responsive control system, comprising:
- means for sensing the ambient temperature;
means for sensing a nonambient control temperature related to the temperature of the coolant coil; and
means responsive to both the ambient temperature sensing means and the control temperature sensing means for controlling the coolant coil fan including means for activating to the nonambient control temperature sensing means for activating the coolant coil fan independently of the ambient temperature sensing means.
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Abstract
A cooling system (10) with a control temperature sensor (24) for sensing the temperature of a coolant coil (14) for control of a coolant coil fan (18) in cooperation with ambient temperature sensed by a thermostat (30) to obtain optimum utilization of residual cooling power of the coolant coil (14) after the condenser (28) has been deactivated and to protect against overcooling and consequent icing of the coolant coil (14) in the event of inadvertent failure of the thermostat (30) to turn off the condenser(28).
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Citations
20 Claims
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1. In an air cooling system having a coolant coil and a coolant coil fan, the improvement being a multitemperature responsive control system, comprising:
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means for sensing the ambient temperature; means for sensing a nonambient control temperature related to the temperature of the coolant coil; and means responsive to both the ambient temperature sensing means and the control temperature sensing means for controlling the coolant coil fan including means for activating to the nonambient control temperature sensing means for activating the coolant coil fan independently of the ambient temperature sensing means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A coolant temperature responsive override control unit for an air cooling system having an ambient thermostat for control of a condenser and of a coolant coil fan, comprising:
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means for sensing the temperature of the coolant coil; means responsive to the coolant coil sensing means for activating the coolant coil fan independently of the ambient thermostat; an ambient thermostat for activating the condenser and the coolant coil fan independently of the coolant coil temperature sensing means; and means responsive to the coolant coil temperature sensing means for disabling the ambient thermostat from deactivating the coolant coil fan after the ambient thermostat has activated the coolant coil fan. - View Dependent Claims (12, 13, 14)
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15. A method of controlling a coolant coil fan of a cooling system with an ambient temperature sensing thermostat and a compressor, comprising the steps of:
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sensing a nonambient control temperature related to the temperature of the coolant coil below a pre-select set temperature at a location apart from the ambient temperature thermostat; and activating the coolant coil fan independently of the ambient temperature sensing thermostat in response to the nonambient control temperature decreasing below the preselected nonambient set temperature until the nonambient control temperature increases above the preselected control set temperature. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification