OVEN WITH RECIRCULATION OF COMBUSTION EXHAUST GASES

摘要

An oven includes a cooking chamber, a gas-fired heat exchanger external of the cooking chamber and a flow path for circulating air from the cooking chamber past the heat exchanger to pick-up heat and then back to the cooking chamber under operation of a blower. A first combustion path gas flow path runs from the heat exchanger to an exhaust system for delivering combustion path gases away from the oven, and a second combustion path gas flow path runs from the heat exchanger to the cooking chamber for delivering combustion path gases into the cooking chamber. A control arrangement is configured to selectively control the flow of combustion path gases along at least one of the first combustion gas flow path or the second combustion gas flow path.