Fin-tube type heat exchanger

Abstract

The present invention relates to a pin-tube type heat exchanger, comprising: tubes through the inside of which a heat medium flows and which are arranged in parallel with a uniform distance therebetween, so that a combustion product can pass through space between the tubes; and heat transfer fins which are separately coupled to the outer surface of the tubes along the lengthwise direction thereof, so as to be parallel to the direction of flow of the combustion product, wherein inside the tubes a first turbulent flow-generating member is installed for creating turbulence in the flow of the heat medium, wherein the first turbulent flow-generating member comprises a flat plate portion, arranged in the lengthwise direction of the tubes, for dividing the inner space of the tubes into two sides, and first guide pieces and second guide pieces which are protrudingly provided at a tilted angle and are separately and alternately provided along the lengthwise direction of both sides of the flat plate portion.

Description

technical field [0001] The invention relates to a fin-pipe heat exchanger which is combined with heat transfer fins on the outer surface of the pipe to exchange heat between the heat medium flowing inside the pipe and the combustion product. A fin-pipe heat exchanger that suppresses noise and improves thermal efficiency by the turbulent flow of the heat medium flowing inside the tube and the combustion product passing between the heat transfer fins. Background technique [0002] Generally, a heating device has a heat exchanger for exchanging heat between a combustion product generated by combustion of fuel and a heat medium (heating water), thereby performing heating or hot water supply using the heated heat medium. [0003] Existing fin-pipe heat exchangers are composed of pipes combined with heat transfer fins in which the heat medium flows along the inner space, and the heat transfer fins have a shape protruding from the surface of the pipes . [0004] refer to figure ...

AI Technical Summary

Problems solved by technology

[0006] However, if image 3 As shown, the existing fin-pipe heat exchanger has the following problem: the lower end 10a of the pipe 10 located on the side where the combustion product produced by the combustion of the burner 70 flows into is locally overheated, so that the pipe 10 passes through the pipe 10. Bubbles B are generated in the internal heat medium to cause boiling noise, and foreign substances such as calcium contained in the heat medium are solidified in the stagnant area inside the pipe 10 to significantly reduce the efficiency of the heat exchanger, and in severe cases The problem of damage caused by overheating in this part

Therefore, when the heat transfer fin 20 is processed into a flat plate, the heat exchange efficiency will be reduced in the region after the temperature critical layer formation point B, and if the temperature critical layer formation point B is far away from the origin of the heat transfer fin 20 If the distance between the heat transfer fins 20 is narrowed from the beginning to the end, there is a problem that the thermal efficiency decreases due to the increase in the flow resistance of the combustion product.

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