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Preparation method of aluminum capillary tube of refrigerating system

A refrigeration system and capillary technology, applied in the direction of the mandrel, etc., can solve the problems that the aluminum capillary cannot be realized, and the drawing method of the aluminum tube cannot be realized, so as to achieve the effects of low manufacturing cost, weight reduction and consumption reduction

Active Publication Date: 2015-05-13
WANMA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inner diameter of the capillary in the refrigeration system is 0.5-2mm, and the aforementioned aluminum tube drawing method cannot be realized; due to the different materials of copper and aluminum, it is also impossible to realize the aluminum capillary with the current copper tube drawing technology.

Method used

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  • Preparation method of aluminum capillary tube of refrigerating system
  • Preparation method of aluminum capillary tube of refrigerating system
  • Preparation method of aluminum capillary tube of refrigerating system

Examples

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Embodiment

[0026] Example: see figure 1 and figure 2 , a method for preparing an aluminum capillary tube in a refrigeration system. The aluminum blank tube 3 is drawn by cold drawing technology, and a drawing die is used during drawing. The die includes an outer mold 1 and a matching mold core 2, wherein the mold core There is a sizing portion 21 of the core head, the drawing force of the aluminum billet tube increases with the increase of the length of the sizing portion of the core head, and the moving mold core pulls the billet tube in a disk to form an aluminum capillary tube of the refrigeration system. The mold core 2 of the present invention also has an intermediate conical portion 22 and a core tail cylindrical portion 23, and the length of the sizing portion of the core head is determined by the following formula: The unit is mm; among them, D is the diameter of the core end cylinder, in mm, d is the diameter of the cylinder at the fixed part of the core head, in mm, f is the...

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Abstract

The invention discloses a preparation method of an aluminum capillary tube of a refrigerating system. The preparation method comprises the following steps: drawing an aluminum parison tube by virtue of a cold drawing technique by using a drawing di, wherein the drawing die comprises an outer die and a die core matched with the outer die, the die core comprises a core head sizing part, a middle cone-shaped part and a core tail cylindrical part; and increasing drawing force of the aluminum parison tube along with increase of the length of the core head sizing part and moving the die core for drawing a parison tube to form the aluminum capillary tube of the refrigerating system. The aluminum capillary tube is developed by taking aluminum and an aluminum alloy as a material. According to a scheme of replacing copper with aluminum in the aluminum capillary tube of the refrigerating system, the welding point is reduced, the performance of a product is improved and the production cost of equipment is further lowered.

Description

technical field [0001] The invention discloses a method for preparing an aluminum capillary tube of a refrigeration system, which belongs to the technical field of capillary tube manufacturing of a refrigeration system according to the International Patent Classification (IPC). Background technique [0002] The capillary tube in the refrigeration system of air conditioner and refrigerator belongs to the expansion device (or throttling device), which is an indispensable basic component of the refrigeration cycle system. At present, in the refrigeration cycle system, the capillary is generally made of copper and connected between the condenser and the evaporator. The capillary produces a pressure drop along the length according to its flow resistance to control the flow of the refrigerant and maintain the condenser and evaporator. pressure difference. [0003] Most of the copper capillary tubes used in existing refrigeration systems have the disadvantage of high cost. Because...

Claims

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Application Information

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IPC IPC(8): B21C1/24B21C3/16B21C9/00
CPCB21C1/24B21C3/16B21C9/00
Inventor 黄夏陈坚孙小平
Owner WANMA TECH CO LTD
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