Temperature controlling for a transport refrigeration system

Claim 3

The method of claim 1 including the steps of: buffering the digital signal, and providing output terminals connected to the buffered digital signal.

Claim 4

A load temperature controller for a transport refrigeration system having heating and cooling modes, and high and low speed modes, comprising: selector means for selecting a set point temperature within a first predetermined temperature range, sensor means for sensing the load temperature, means for providing an analog ratio between the selected set point temperature and the sensed load temperature, means providing first and second analog reference signals, comparator means for comparing said first and second analog reference signals with the analog ratio to detect failure of the sensor means, converter means for converting the analog ratio to a digital signal having a predetermined number of bit changes between all logic ones and all logic zeros, said converter means scaling the conversion such that all of the predetermined number of bit changes occur within a second predetermined temperature range relative to set point, with the second predetermined temperature range being smaller than the first temperature range, and logic array means having inputs responsive to said digital signal, said logic array means being programmed to provide a plurality of transport refrigeration system control signals in response to predetermined values of the digital signal.

Claim 5

A load temperature controller for a transport refrigeration system having heating and cooling modes, and high and low speed modes, comprising: selector means for selecting a set point temperature within a first predetermined temperature range, sensor means for sensing the load temperature, means for providing an analog ratio between the selected set point temperature and the sensed load temperature, means providing first and second analog reference signals, comparator means for comparing said first and second analog reference signals with the analog ratio to detect failure of the sensor means, converter means for converting the analog ratio to a digital signal having a predetermined number of bit changes between all logic ones and all logic zeros, said converter means scaling the conversion such that all of the predetermined number of bit changes occur within a second predetermined temperature range relative to set point, with the second predetermined temperature range being smaller than the first temperature range, and logic array means having inputs responsive to said digital signal, said logic array means being programmed to provide a plurality of transport refrigeration system control signals in response to predetermined values of the digital signal.

Claim 6

The load temperature controller of claim 3 including: means buffering the digital signal, and output terminal means for making the buffered output digital signal available as an output signal.