Burner and cooking apparatus therewith

Abstract

An over or grill burner includes a hollow body with a supplying port receiving a gaseous fuel mixture and outlet holes emitting the gaseous fuel mixture, and a conveying duct conveying the gaseous fuel mixture toward the hollow body, which has a delivering port and a supplying / mixing port with a first aperture for a fuel gas and a second aperture for a gaseous combusting product, and a reflector conveying a flame produced by combustion of the fuel mixture from the outlet holes. The supplying port of the hollow body and the delivering port of the conveying duct have a substantially circular cross-section and are connected to each other in a freely rotatable manner.

Description

FIELD OF THE INVENTION[0001]The present invention relates to an oven or grill burner.BACKGROUND OF THE INVENTION[0002]Oven or grill burners typically comprise a hollow box body provided with a supplying port, which, in use, is supplied with a gaseous fuel mixture.[0003]Such mixture is discharged from a plurality of outlet holes and it is ignited by a suitable igniter.[0004]The flame generated in this manner therefore is conveyed by a reflector coupled to the burner.[0005]The box body is coupled to a duct conveying the gaseous fuel mixture.[0006]Such fuel mixture comprises a fuel gas (for example methane, town gas, propane or mixtures of different gases) and a comburent, usually air.[0007]The mixing percentage between fuel and comburent (oxygen of air) is such to allow combustion to take place only downstream the supply of the fuel mixture from the holes of the box body, according to known techniques and therein no further reference is made thereto.[0008]Examples of known burners are...

AI Technical Summary

Benefits of technology

The present invention is about a burner that can be used in different types of ovens without needing to make special configurations for each installation. The burner has also been designed to easily attach ducts and bodies together, so they can be locked into position easily.

Problems solved by technology

Firstly it has to be noted that the size and positioning of burners in ovens are subjected to differences from one to another oven model. Such differences are due to conventional construction configurations of ovens and also to security regulations. For example the nozzle injecting the gas in the mixer with combustion air can be arranged at any walls of the oven, except for the door and in any point of the corresponding wall and moreover it can also be provided outside the oven chamber or inside it.

As it will be disclosed below, the internal or external positioning of the gas injecting nozzle leads to completely different operating conditions and it also constraints the position of the nozzle at the wall.

A further adverse effect that can result in positioning the fuel gas injecting nozzle in the bottom area of the oven is the fact that combustion air in the upper area of the oven, that is at the top, is at a temperature higher than the air that—in the oven—is at the bottom.

The several variants for positioning the gas injecting nozzles relative to the oven compartment and the several dimensions of the oven compartment, currently result in providing the burners with a plurality of shapes and sizes, with waste of money for keeping them in stock and for the manufacturing process which reduce the margins of burner manufacturers and of oven or kitchen manufacturers since they are obliged to produce burners dedicated to different oven models.

Since the mixing portion is short with respect to the first outlet holes of the burner (venturi portion) due to dimension reasons between the first holes of the burner the mixture is turbulent and the flame is not stable.

A certain unevenness of the mixture is also detected which contributes in further worsening the flame in the area of the first outlet holes, that is the holes close to the venturi tube and more precisely to the outlet thereof in the burner chamber.

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