| 摘要 |
A control system for a toaster oven incorporating a conveyor driven by an inexpensive ac motor, where the control system allows the entire range of toasting demands to be met while also compensating for variations in the line voltage. The heart of the toasting control is the reliance on the total dwell time of the bread products within the toasting zone of the oven, rather than on the speed of the motor. The control system also provides for a convection fan of varying speed without the need to replace the inexpensive muffin fan with more elaborate devices. Among the advantages offered by the dwell time approach is on-the-fly adjustment upward or downward of the degree of toasting, there being no need to await for the toasting zone to heat up or cool down to achieve this.
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