| 摘要 |
A heating system, a deep fat fryer, control devices therefor and methods of making the same are provided, the control device comprising a temperature sensing unit for sensing the actual temperature of the output heating effect of a heat producing unit, and a setpoint unit for selecting a desired setpoint temperature that the heat producing unit is to provide with the output heating effect thereof, the control device being so constructed and arranged that the same is adapted to tend to cause the heat producing unit to provide the desired setpoint temperature with the output heating effect thereof, the control device being so constructed and arranged that the same is adapted to turn off the heat producing unit if the actual rate of change of the temperature of the output heating effect thereof is greater than a target rate of change thereof when the actual temperature of the output heating effect at that time is below the desired setpoint temperature and to turn on the heat producing unit if the actual rate of temperature change of the output heating effect thereof is less than the target rate of change when the actual temperature of the output heating effect thereof at that time is below the desired setpoint temperature where the target rate of change is based upon the formula Stb=(Tsp-T)xS where Stb is the target rate of change, Tsp is the desired setpoint temperature, T is the actual temperature of the output heating effect and S is a selected constant that comprises a sensitivity factor. |
