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Gas-fired tunnel oven

A technology of tunnel furnace and gas, which is applied in the field of tunnel furnace to achieve precise and uniform heating, reduce the risk of leakage, and simple adjustment

Active Publication Date: 2010-08-04
SVEBA DAHLEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, increased energy costs require energy-efficient solutions

Method used

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  • Gas-fired tunnel oven
  • Gas-fired tunnel oven
  • Gas-fired tunnel oven

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Figure 1a and Figure 1b A perspective view of a first embodiment of a tunnel furnace 100 is shown. Portions of the supporting frame and protective panels have been removed to reveal elements related to the heating system. The tunnel furnace has upper and lower heating sections 102 and 104 , respectively, defining a heating chamber therebetween. A conveyor belt (not shown), typically an endless belt, such as a wire mesh belt, solid steel belt or stone / steel belt, etc., is arranged to convey the product to be baked through the heating chamber, from the inlet side to the outlet side of the furnace 100 .

[0028] The heating system will now be described, starting from the burner 106 and proceeding downstream thereof. The upper and lower heating sections 102 and 104 are substantially identical, and in the figures reference numerals are in some cases only on the lower or upper section for added clarity, even though the elements are located on both sections. Gas line 108...

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Abstract

An indirectly heated, gas-fired tunnel oven has upper and lower heating sections (102, 104) with upper and lower heating means (116) defining a baking chamber between them. Each heating section (102, 104) has an associated gas-fired burner (106) arranged to provide heated gases to each heating means (116) through ducts (112). At least one section (102, 104) comprises a fan (120) arranged downstream at least one heating means (116), which fan is arranged to drive a flow of heated gases through at least one section (102, 104) and a duct (122) arranged to recirculate gases from the fan to a location upstream the heating means (116).

Description

technical field [0001] The present invention relates to tunnel furnaces, and more particularly to gas-heated tunnel furnaces. Background technique [0002] Tunnel ovens are used for baking / cooking food such as bread and biscuits, and other types of food such as pizza, pies, etc. Tunnel ovens generally comprise a baking chamber with upper and / or lower heating ducts providing heat to the product being roasted / cooked. A conveyor such as an endless belt carries the product being toasted / cooked through the toasting chamber between the upper and lower heating ducts. [0003] A tunnel furnace of the above type is disclosed in US-A-4 884 552 . This particular patent relates to ovens for baking food products such as pizza. In this disclosed furnace, heated air from the gas burners is directed through upper and lower heat exchangers which transfer heat to the upper and lower pot mechanisms which ultimately transfer the heat to the furnace through the upper and lower furnace floors....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A21B1/28A47J37/04
CPCA21B1/245A21B1/145A21B1/48A21B1/10A21B1/28A47J37/045
Inventor J-O·约翰逊
Owner SVEBA DAHLEN