| 摘要 |
An electronic temperature sensing system for toaster appliances and the like which is capable of providing a consistent toast color independent of toast compartment temperature at the initiation of each toasting operation, the condition of the bread to be toasted and bread loading. The system includes principally a temperature sensing device having a varying resistance versus temperature characteristic that is placed in close thermal coupling with the bread to be toasted for developing a voltage Vs as a function of temperature, and integrating means for deriving a voltage Vu that is an integrated function of the voltage Vs and represents a varying reference temperature. The difference between Vs and Vu is obtained and compared to a given voltage corresponding to a given toast color for generating a signal that terminates the toasting operation upon said given toast color being reached.
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