Tunnel furnace

Abstract

The invention discloses a tunnel furnace. The tunnel furnace comprises a shell, a heat source structure, a baking structure, and a thermal cycling structure; the heat source structure, the baking structure and the thermal cycling structure are fixedly mounted in the shell; the baking structure comprises a radiation plate assembly and side plates; the radiation plate assembly is composed of a radiation plate or a plurality of radiation plates which are in split joint; a baking passageway is enclosed by the radiation plate assembly and the side plates; a heat exchange channel is arranged insidethe radiation plate assembly; one end of the heat exchange channel communicates with the thermal cycling structure; the other end of the heat exchange channel, the heat source structure and the thermal cycling structure sequentially communicate with each other, thereby forming a closed annular cycling passage; and an exhaust valve is arranged on the thermal cycling structure so as to be used for allowing communication between the cycling passage and the exterior. The tunnel furnace provided by the invention has the advantages of being capable of saving energy, as well as stable and controllable in temperature.

Description

technical field [0001] The invention relates to a heating device, in particular to a tunnel furnace. Background technique [0002] Heat transfer is a complex phenomenon, generally divided into three basic ways, heat conduction, heat convection and heat radiation. The heat transfer process in production and life is often a combination of these three basic methods in different proportions. The food baking process is accompanied by complex chemical and physical changes. Dehydration is a function of food baking. Conduction heating requires the product to be in contact with the heat conduction plate, and the uncontacted parts are heated slowly; heat convection uses a flowing medium to heat the product, and the thermal effect is the best, but the temperature fluctuates greatly; radiation heating has slow heat transfer, good constant temperature performance, and energy efficiency. high. Heat conduction, heat convection, and heat radiation each have their own advantages and disa...

AI Technical Summary

Problems solved by technology

Conduction heating requires the product to be in contact with the heat conduction plate, and the uncontacted parts are heated slowly; heat convection uses a flowing medium to heat the product, and the thermal effect is the best, but the temperature fluctuates greatly; radiation heating has slow heat transfer, good constant temperature performance, and energy utilization. high

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