Tube fin type parallel flow heat exchanger

Abstract

The invention provides a tube fin type parallel flow heat exchanger, which comprises flow collecting pipes, fins and coolant pipes, wherein at least mutual contact parts of the flow collecting pipes, the fins or the coolant pipes are made of a composite material with at least two-layer structure; and the melting point temperature of a mutual contact surface layer material is lower than the melting point temperature of a base layer material. Each coolant pipe is a hollow pipe, each fin with a through hole folding edge is sleeved on the coolant pipe, two ends of each coolant pipe are inserted into turned-up edge holes of a flow collecting pipe, and the inner space of each coolant pipe is communicated with that of each flow collecting pipe; after the coolant pipes, the flow collecting pipes and the fins are assembled, the whole body is heated to a temperature between the melting point temperature of the surface layer material and the melting point temperature of the base layer material; the surface layer material is melted to play a role of a brazing material; and the heat exchanger is welded into a whole. Industrialized production of the tube fin type parallel flow heat exchanger can be realized, the welding quality is consistent and easy to control, automatic assembly of the heat exchanger can be realized and the long-term use performance of the heat exchanger is kept consistent.

Description

technical field [0001] The invention relates to a parallel flow heat exchanger, in particular to a tube-fin parallel flow heat exchanger. Background technique [0002] Parallel flow heat exchangers are easy to optimize the distribution of refrigerant flow, so they have better heat transfer characteristics and higher heat exchange efficiency. The existing parallel flow heat exchanger mostly adopts plate-fin structure, and its heat exchange unit is as follows: figure 1 As shown, the heat exchanger composed of these heat exchange units is as follows figure 2 As shown, due to the existence of "plate" (such as the flat side of the microchannel flat tube) in the heat exchanger composed of plate-fin heat exchange units, the condensed water on the air side cannot be smoothly discharged downward, which affects the heat exchange efficiency. If the heat exchanger is used as the outdoor side heat exchanger in the air conditioner, ice blockage will easily occur under low temperature h...

AI Technical Summary

Problems solved by technology

CN101029808 discloses a circular tube parallel flow heat exchanger. The heat exchanger only uses circular tubes instead of flat tubes, and still uses folded fins. The condensed water is still difficult to drain downward due to the obstruction of the fins.

CN102032718A discloses a parallel-flow finned heat exchanger, which only provides an overall technical solution, and does not propose a corresponding solution for how to realize the structure

The above published documents can only solve some of the problems of the tube-fin parallel flow heat exchanger, and there is a certain distance from the real realization of the industrialization of the tube-fin parallel flow heat exchanger.

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