公开(公告)号：US09107422B2

公开(公告)日：2015-08-18

申请号：US13708393

申请日：2012-12-07

Applicant: Unitherm Food Systems, Inc.

Inventor： David Howard ,  Austen Laur

IPC: F24C15/32 ,  A21B1/40 ,  A21B1/48 ,  A21B1/26

CPC classification number: A21B1/26 ,  A21B1/40 ,  A21B1/48 ,  A23L1/0128 ,  A23L5/15 ,  A23V2002/00 ,  F24C15/322

Abstract: An improved spiral oven and method for its use includes the step of using a forward/reversing fan to produce a first airflow and a second inverted airflow in the cooking chamber. The proportion of time each airflow occurs may be unbalanced within an oven residence time or cook cycle, and either airflow may begin the cycle. In addition, the fan velocity may vary so that the speed of the first airflow is different from the speed of the second airflow. A braking resistor allows the fan to quickly changeover between full-forward and full-reverse directions, while a programmable delay limits adjustments to the heat output control method until temperature variations caused by alternating between the first direction of rotation and the second direction of rotation have stabilized. Because of the reversing airflow pattern, the product cooks more evenly across the cook belt.

Abstract translation: 改进的螺旋炉及其使用方法包括使用向前/反向风扇在烹饪室中产生第一气流和第二反向气流的步骤。 每个气流发生的时间的比例可能在烘箱停留时间或烹饪周期内不平衡，并且气流可以开始循环。 此外，风扇速度可以变化，使得第一气流的速度不同于第二气流的速度。 制动电阻允许风扇在全方向和全方向之间快速切换，而可编程延迟限制对热输出控制方法的调整，直到由第一旋转方向和第二旋转方向之间的交替引起的温度变化具有 稳定 由于反转气流模式，产品在烹饪带上更均匀地烹饪。