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Manufacturing method of sintering-free parallel flow heat exchanger

A technology of parallel flow heat exchanger and manufacturing method, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problem of increasing the cost and development space of parallel flow evaporators in small batches, high cost of composite aluminum foil, low bundling efficiency, etc. To solve the problem of low bundling efficiency, reduce production costs and improve production efficiency

Inactive Publication Date: 2019-04-26
HENAN KELONG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the heat exchanger used in refrigerators adopts the shape of a harmonica tube. Because the inner diameter of the harmonica tube is small, the heat exchange efficiency is greatly increased due to the Raynaud phenomenon, and it has been widely used in the air-conditioning refrigerator industry. However, the conventional parallel flow The heat exchanger mainly uses harmonica tubes and composite aluminum foil folded into various shapes to be welded together by sintering. Due to the high cost of composite aluminum foil, especially the sintering process, it is more suitable for mass production. For small and small batch production, It has formed a great obstacle, because the sintering process requires a lot of tooling, and the bundling efficiency is low. The above problems increase the cost and development space of producing small batch parallel flow evaporators

Method used

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  • Manufacturing method of sintering-free parallel flow heat exchanger
  • Manufacturing method of sintering-free parallel flow heat exchanger
  • Manufacturing method of sintering-free parallel flow heat exchanger

Examples

Experimental program
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Effect test

Embodiment 1

[0009] Preparation of the present invention comprises the following steps:

[0010] Step 1: Make fins, the fins are made of holes in the middle of the aluminum foil, and there are flanging at the holes;

[0011] Step 2: Insert the harmonica tube into the interference fit connection through the hole on the fin;

[0012] Step 3: Bending step 2, and installing fixed end plate brackets at both ends of the bending;

[0013] Step 4: Manually weld the flow-collecting tube and the connecting tube at both ends of the harmonica tube to form a parallel-flow heat exchanger.

Embodiment 2

[0015] To make the fins, punch holes along one side of the aluminum foil, and flang the holes. The length of the aluminum foil is based on the number of S-shaped bends of the harmonica tube, and the fins are placed into the pendulum according to certain rules.

[0016] Fold the harmonica tube into an S-shaped bend corresponding to the opening of the fin, press it into the fin through a hydraulic press or a special plane, and fix it on the fin group;

[0017] The inner diameter of the fin opening is smaller than the outer diameter of the harmonica tube, the purpose is to connect more closely, interference fit, to reduce thermal resistance;

[0018] A parallel-flow evaporator is formed by adding end plates to the harmonica tubes fixed with fins, welding flow-collecting tubes, and connecting tubes.

[0019] The thickness of the aluminum foil is 0.1-0.3 mm, preferably 0.15 mm in this technical solution.

[0020] The harmonica pipe is folded into an S-bend as required.

[0021] T...

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Abstract

The invention discloses a manufacturing method of a sintering-free parallel flow heat exchanger. The method comprises the following steps that fins are manufactured, holes are formed in aluminum foilsso that the independent open fins can be obtained, or holes are punched in the direction of one sides of the aluminum foils so that the fins can be obtained, a harmonica-shaped tube penetrates through the independent fin holes so that the harmonica-shaped tube can be in interference fit with the fin holes, then the harmonica-shaped tube is bent, or the harmonica-shaped tube is bent into an S shape, end plates are installed at the two ends of the harmonica-shaped tube fixed to the fins, collecting pipes connected with a connecting pipe are welded to the two ends of the harmonica-shaped tube, and then a parallel flow evaporator is formed. According to the manufacturing method of the sintering-free parallel flow heat exchanger provided by the invention, market requirements of small amount and large batches are met, the Raynaud's phenomenon can be achieved, the aluminum foil fins are mechanically connected with the harmonica-shaped tube in the interference fit mode, the processing technique is simple, the heat transfer area can be effectively adjusted, the production cost is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a heat exchanger used in a refrigerator, in particular to a parallel flow condenser. Background technique [0002] At present, the heat exchanger used in refrigerators adopts the shape of a harmonica tube. Because the inner diameter of the harmonica tube is small, the heat exchange efficiency is greatly increased due to the Raynaud phenomenon, and it has been widely used in the air-conditioning refrigerator industry. However, the conventional parallel flow The heat exchanger mainly uses harmonica tubes and composite aluminum foil folded into various shapes to be welded together by sintering. Due to the high cost of composite aluminum foil, especially the sintering process, it is more suitable for mass production. For small and small batch production, It has formed a great obstacle, because the sintering process requires a lot of tooling, and the bundling efficiency is low. The above problems increase the cost and development sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B39/02
CPCF25B39/02F25B2339/02F25B2500/05F25B2500/09
Inventor 李小红王跃河高相启张自昌周盼盼张平平李志良
Owner HENAN KELONG GRP
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