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Method for controlling enthalpy in air conditioning systems

  • US 20090192650A1
  • Filed: 01/24/2008
  • Published: 07/30/2009
  • Est. Priority Date: 01/24/2008
  • Status: Abandoned Application
First Claim
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1. In an air conditioning system comprising:

  • a temperature responsive sensor in the occupied space to be cooled that provides a temperature responsive control signal to activatea mechanical refrigeration compressor having a variable output capacity operatively coupled toan evaporator within the supply air duct, andan actuating means to select said capacity of said compressor, anda blower to route air in heat transfer relationship with said evaporator,and variable speed actuating means to drive said blowera method to control enthalpy and compressor output capacity in the environment of a structure, which comprises;

    a. a temperature responsive means to determine the sensible temperature of the supplied air after having passed over the evaporator coil;

    b. a means to generate a control signal in response to said sensible supplied air temperature including the means to vary said signal as said sensible temperature variesc. a means to supply said variable control signal in response to said sensible supplied air to said blower actuating means to vary the output of said actuating means and thus the speed of said blower, whereby said blower speed is modulated to maintain a prescribed dew point of said supplied air such that said blower speed is reduced when said determined temperature of said supplied air exceeds said dew point and said blower speed is increased when said sensed temperature of said supplied air is below said dew point;

    d. a means to calculate latent heat load relative to compressor output capacity as a function of said resultant blower speed;

    e. a means to generate a second control signal in response to said calculated relative latent heat load, andf. a means to supply said second control signal to said actuating means of said variable output compressor to vary said output capacity of said compressor in response to said calculated relative latent heat load

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