Enthalpy comparator
First Claim
1. A fluidic enthalpy comparator for comparing the enthalpies of first and second bodies of air comprising:
- first and second temperature sensors for providing first and second respective pressures dependent upon the temperatures of respective first and second bodies of air;
first and second humidity sensors for providing respective third and fourth pressures dependent upon the humidities of said respective first and second bodies of air;
a diaphragm module unit having a first diaphragm defined chamber connected to said first temperature sensor for receiving said first pressure, a second diaphragm defined chamber connected to said second temperature sensor for receiving said second pressure, a third diaphragm defined chamber connected to said first humidity sensor for receiving said third pressure, and a fourth diaphragm defined chamber connected to said second humidity sensor for receiving said fourth pressure, and output means responsive to said pressures within said first, second, third and fourth diaphragm defined chambers for providing a proportional output signal dependent upon the enthalpies of said first and second bodies of air.
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Accused Products
Abstract
An enthalpy comparator for comparing the enthalpies of two bodies of air is disclosed having a first temperature sensor and a first humidity sensor for sensing the temperature and humidity respectively of the first body of air, a second temperature sensor and a second humidity sensor for sensing the temperature and humidity respectively of the second body of air, and a diaphragm module unit having a first diaphragm defined chamber connected to the first temperature sensor, a second diaphragm defined chamber connected to the second temperature sensor, a third diaphragm defined chamber connected to the first humidity sensor, and a fourth diaphragm defined chamber connected to the second humidity sensor, and an output sensing mechanism associated with the four chambers for providing an output dependent upon the enthalpies of the first and second bodies of air, and, in particular, the difference between the enthalpies of the first and second bodies of air. The areas of the diaphragms which define the first, second, third and fourth chambers are selected to yield a close approximation of the enthalpies of the two bodies of air.
92 Citations
20 Claims
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1. A fluidic enthalpy comparator for comparing the enthalpies of first and second bodies of air comprising:
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first and second temperature sensors for providing first and second respective pressures dependent upon the temperatures of respective first and second bodies of air; first and second humidity sensors for providing respective third and fourth pressures dependent upon the humidities of said respective first and second bodies of air; a diaphragm module unit having a first diaphragm defined chamber connected to said first temperature sensor for receiving said first pressure, a second diaphragm defined chamber connected to said second temperature sensor for receiving said second pressure, a third diaphragm defined chamber connected to said first humidity sensor for receiving said third pressure, and a fourth diaphragm defined chamber connected to said second humidity sensor for receiving said fourth pressure, and output means responsive to said pressures within said first, second, third and fourth diaphragm defined chambers for providing a proportional output signal dependent upon the enthalpies of said first and second bodies of air. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A fluidic enthalpy comparator for comparing the enthalpies of first and second bodies of air comprising:
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first and second temperature sensors for providing first and second respective pressures dependent upon the temperature of said first and second bodies of air respectively; first and second humidity sensors for providing respective third and fourth pressures dependent upon the humidities of said first and second bodies of air respectively; a diaphragm module unit consisting of a housing, said housing having a first chamber connected to said first temperature sensor for receiving said first pressure, a second chamber connected to said second temperature sensor for receiving said second pressure, a third chamber connected to said first humidity sensor for receiving said third pressure, and a fourth chamber connected to said second humidity sensor for receiving said fourth pressure, diaphragms for defining said first, second, third and fourth chambers, said diaphragms having areas to satsify the formula h1 -h2 =0.172(RH1 -RH2)+0.551(T1 -T2) where h1 is the enthalpy of the first body of air, h2 is the enthalpy of the second body of air, RH1 is the humidity of the first body of air, RH2 is the humidity of the second body of air, T1 is the temperature of the first body of air and T2 is the temperature of the second body of air, a force transmitter operatively associated with said diaphragms, a nozzle for operating in conjunction with said force transmitter to respond to said pressures within said first, second, third and fourth chambers, said nozzle providing an output signal dependent upon the difference between the enthalpies of said first and second bodies of air.
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Specification