Multiple Air dam device
a multi-air dam and airflow technology, which is applied in the direction of ventilation systems, lighting and heating apparatus, heating types, etc., can solve the problems of difficult to acquire a uniform velocity and/or mass flow of air along the length of the duct, adversely affect the uniformity of cooking and efficiency of the oven, and increase the energy cost of operating the oven. achieve the effect of balanced airflow pressur
Inactive Publication Date: 2008-02-21
LINCOLN FOODSERVICE PRODS
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Benefits of technology
"The present patent is about a device called an air dam that helps to direct the airflow out of an air duct in a balanced manner. This device helps to ensure a balanced airflow pressure along the length of the air duct and also helps to ensure that the air exiting the duct does so in a flow that is substantially normal to the duct surface. The patent also describes an impinging air duct with a columnating plate and at least one air dam that helps to direct the airflow through the duct. The technical effect of this patent is to provide an improved method for directing air flow through an impinging air duct."
Problems solved by technology
In situations where an oven with a lower dimensional profile or reduced height is preferred, this presents a problem because it is more difficult to acquire a uniform velocity and / or mass flow of air along the length of the duct.
This phenomenon can adversely affect uniformity of cooking and efficiency of the oven, as well as increase the energy costs of operating the oven.
Additionally, this problem can add to the engineering costs associated with designing such an oven, because the airflow characteristics of the air entering the dispensing duct and the characteristics of the duct itself will have to be adjusted according to the particular dimensions of the oven.
Method used
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[0016]The air dams of the present disclosure are inserted into air dispensing ducts to help evenly distribute the flow of air out of the duct. Several air dams can be utilized in each dispensing duct, depending on the size of the duct. The air dam is a generally linear device that is connected to the columniating plate at an angle to that plate. This helps the air entering the duct make the transition from a generally horizontal flow to a generally vertical flow out of the dispensing orifices. Air entering the duct is captured by the first air dam, and directed out of the duct through the columnating orifices. When the space behind the air dam is filled up, the remaining air entering the duct passes over the first air dam, and passes onto the next air dam or air cavity within the duct. Thus, the air dams of the present disclosure help to ensure an even flow of air along the length of the dispensing duct, which substantially saves on the heating and energy costs associated with curre...
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An impinging air duct comprising a columnating plate and a plurality of orifices disposed thereon. A plurality of air dams direct air entering the impinging air duct through the orifices, to ensure that the flow of air out of the duct is substantially even along the length of the duct.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application claims priority to U.S. Provisional Patent Application No. 60 / 837,866, filed on Aug. 15, 2006.BACKGROUND OF THE DISCLOSURE[0002]1. Field of the Disclosure[0003]The present disclosure relates to a device for improving airflow inside an impinging air duct. More particularly, the present disclosure relates to an air dam that balances the air pressure along the length of the duct.[0004]2. Description of the Related Art[0005]In the field of impinging air ovens and other devices, an air duct is often a tapered, horizontal air delivery device disposed above and / or below the cooking surface. As heated air enters the air duct, the duct becomes pressurized and directs the airflow toward jet-forming or columnating orifices disposed in a columniating plate. These orifices then direct the airflow toward a cover plate with a second pattern of orifices or dispensing ducts. When the ducts are used in ovens, a food product can be p...
Claims
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IPC IPC(8): F24F7/00
CPCA21B1/245
Inventor HUANG, MING LUNG
Owner LINCOLN FOODSERVICE PRODS