Finned tube heat exchanger for air conditioner

Abstract

The present invention provides a finned tube heat exchanger for an air conditioner in which the fins are less likely to be bent at the slit-shaped cut-up portions provided on the fins. This fin-and-tube heat exchanger is configured in such a way that a plurality of fins (12) are arranged parallel to each other and spaced apart from each other in a y-direction at a right angle to the x-direction, which is a flow direction of heat exchange fluid, to form a fin group. a plurality of such fin groups are arranged in a row along the z direction which is at right angles to the x direction and the y direction, and the fin groups are spaced apart from each other by a constant distance, and the heat transfer tubes are sequentially passed through the plurality of fin groups. The group of fins is arranged in a zigzag form, in which the incision lines (30, 30, 30) Not located on the same straight line in the z direction.

Description

technical field [0001] The present invention relates to a heat exchanger for exchanging heat between a heat exchanging fluid such as air and a refrigerant, and particularly relates to a finned tube heat exchanger suitable for use as a heat exchanger for an air conditioner. Background technique [0002] Conventionally, cross-fin tube heat exchangers have been mainly used as heat exchangers for air conditioners. The cross-fin-tube heat exchanger has such a structure that a plurality of heat transfer tubes bent into a hairpin shape are inserted into the plurality of fins in a direction perpendicular to the plurality of fins, and the heat transfer tubes are expanded. diameter so that the fins engage the heat transfer tubes. Then, a predetermined refrigerant is circulated in the heat transfer tubes, while air is made to flow along the fins in a direction perpendicular to the heat transfer tubes, thereby exchanging heat between the refrigerant and the air. [0003] In addition, ...

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Problems solved by technology

[0008] However, in a finned tube heat exchanger, especially in the case of a heat exchanger in which a fin is inserted into a heat transfer tube, it is different from a heat exchanger in which a larger fin is inserted into a plurality of heat transfer tubes. The size of the fins is smaller than that of the case, and a plurality of slit-shaped cut and raised portions are formed on such a small fin, and the fins tend to be bent starting from the cut and raised portions of the slits. The problem

That is, when excessive external force is applied to the fins when assembling the heat exchanger, etc., there will be a problem that the fins are bent starting from the slit-shaped cut-up portions formed on the fins. , resulting in disordered fin spacing or blockage of the gap between fins, resulting in increased ventilation resistance and a significant reduction in the heat transfer capacity between the heat exchange fluid (air) passing through the fins and the fins

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