阅读说明：本技术 一种制冷系统铝毛细管以及制备方法 (Aluminum capillary tube of refrigeration system and preparation method ) 是由 尚光明 于 2020-06-01 设计创作，主要内容包括：本发明公开了一种制冷系统铝毛细管,包括以下重量份的原料：硅0.3-0.6份、铁0.5-0.9份、铜0.05-0.3份、锰0.3-1.5份、镁0.05-0.8份、铬0.1-0.3份、锌0.1-0.4份、钛0.1-0.2份、余量为铝,其制备方法包括以下步骤：S1、提供铝合金材质的管坯；S2、多级拉制：在所述管坯内注入拉拔润滑油和插入游动芯头,再将所述管坯的一端穿过拉拔设备的缩管模具,使用拉拔设备的钳口夹住所述管坯,启动拉拔设备拉拔所述管坯,在所述管坯拉伸过程中喷润滑油到所述管坯和缩管模具上。本发明加工出来的毛细管流量稳定,符合制冷系统用毛细管的要求也有效减少对铜的使用量,节约成本。(The invention discloses an aluminum capillary tube of a refrigerating system, which comprises the following raw materials in parts by weight: 0.3-0.6 part of silicon, 0.5-0.9 part of iron, 0.05-0.3 part of copper, 0.3-1.5 parts of manganese, 0.05-0.8 part of magnesium, 0.1-0.3 part of chromium, 0.1-0.4 part of zinc, 0.1-0.2 part of titanium and the balance of aluminum, and the preparation method comprises the following steps: s1, providing a tube blank made of an aluminum alloy material; s2, multi-stage drawing: injecting drawing lubricating oil and inserting a moving core head into the tube blank, enabling one end of the tube blank to penetrate through a pipe reducing die of drawing equipment, clamping the tube blank by using a jaw of the drawing equipment, starting the drawing equipment to draw the tube blank, and spraying the lubricating oil to the tube blank and the pipe reducing die in the drawing process of the tube blank. The capillary tube processed by the method has stable flow, meets the requirement of the capillary tube for a refrigerating system, effectively reduces the consumption of copper and saves the cost.)

1. The aluminum capillary tube of the refrigeration system is characterized by comprising the following raw materials in parts by weight: 0.3-0.6 part of silicon, 0.5-0.9 part of iron, 0.05-0.3 part of copper, 0.3-1.5 parts of manganese, 0.05-0.8 part of magnesium, 0.1-0.3 part of chromium, 0.1-0.4 part of zinc, 0.1-0.2 part of titanium and the balance of aluminum.

2. The aluminum capillary tube of claim 1, comprising the following raw materials in parts by weight: 0.4-0.5 part of silicon, 0.6-0.8 part of iron, 0.1-0.2 part of copper, 0.7-1.0 part of manganese, 0.2-0.6 part of magnesium, 0.15-0.25 part of chromium, 0.2-0.3 part of zinc, 0.12-0.18 part of titanium and the balance of aluminum.

3. The aluminum capillary tube of claim 1, which comprises the following raw materials in parts by weight: 0.45 part of silicon, 0.7 part of iron, 0.15 part of copper, 0.85 part of manganese, 0.4 part of magnesium, 0.2 part of chromium, 0.25 part of zinc, 0.15 part of titanium and the balance of aluminum.

4. A method for preparing an aluminum capillary tube of a refrigeration system according to any one of claims 1 to 3, which comprises the following steps:

s1, providing a tube blank made of an aluminum alloy material;

s2, multi-stage drawing: injecting drawing lubricating oil and inserting a moving core head into the tube blank, enabling one end of the tube blank to penetrate through a tube reducing die of drawing equipment, clamping the tube blank by using a jaw of the drawing equipment, starting the drawing equipment to draw the tube blank, and spraying the lubricating oil to the tube blank and the tube reducing die in the tube blank drawing process;

s3, replacing the pipe contracting dies and the floating core heads with different specifications and repeating the step S2, and then drawing to form the aluminum capillaries with different specifications.

5. The method of claim 4, wherein in the step S2, the drawing device is a red copper capillary drawing device.

6. The method for preparing the aluminum capillary tube of the refrigeration system as claimed in claim 4, wherein in the step S2, the drawing speed of the drawing device is 190-210 r/min.

Technical Field

The invention relates to the technical field of capillaries, in particular to an aluminum capillary of a refrigeration system and a preparation method thereof.

Background

Capillary tubes in refrigeration systems of air conditioners and refrigerators belong to throttling devices and are an indispensable basic part in the refrigeration cycle system. At present, in a refrigeration cycle system, a capillary tube is generally made of red copper and is used for connecting a condenser and an evaporator, and due to flow resistance, a refrigerant in the capillary tube generates pressure drop along the length direction, so that the flow rate of the refrigerant is controlled, and the pressure difference between the condenser and the evaporator is maintained. Because the cost of copper is high, the manufacturing process of the capillary is complicated, and the processing cost of the copper capillary is very high, the capillary and the transition pipe are connected by adopting a welding method in the process of using the copper capillary.

It will be appreciated by those skilled in the art that every more weld in a refrigerant system increases the chance of leakage from the refrigerant system. The modern fierce competition in the white household appliance market is the primary task of production enterprises to reduce cost on the premise of ensuring product quality, aluminum has the advantages of high heat transfer performance, low price, light weight, rich resources and the like compared with copper, a refrigeration all-aluminum system of a refrigerator and an ice chest and an air conditioner are gradually aluminized, which is generated on the background, and the aluminum capillary tube developed by the invention is a new substitute product matched with the all-aluminum system.

Disclosure of Invention

The invention aims to solve the defects of high cost and complex manufacturing process in the prior art, and provides an aluminum capillary tube of a refrigerating system and a preparation method thereof.

The invention provides a refrigeration system aluminum capillary tube, which comprises the following raw materials in parts by weight: 0.3-0.6 part of silicon, 0.5-0.9 part of iron, 0.05-0.3 part of copper, 0.3-1.5 parts of manganese, 0.05-0.8 part of magnesium, 0.1-0.3 part of chromium, 0.1-0.4 part of zinc, 0.1-0.2 part of titanium and the balance of aluminum.

Preferably, the feed comprises the following raw materials in parts by weight: 0.4-0.5 part of silicon, 0.6-0.8 part of iron, 0.1-0.2 part of copper, 0.7-1.0 part of manganese, 0.2-0.6 part of magnesium, 0.15-0.25 part of chromium, 0.2-0.3 part of zinc, 0.12-0.18 part of titanium and the balance of aluminum.

Preferably, the feed comprises the following raw materials in parts by weight: 0.45 part of silicon, 0.7 part of iron, 0.15 part of copper, 0.85 part of manganese, 0.4 part of magnesium, 0.2 part of chromium, 0.25 part of zinc, 0.15 part of titanium and the balance of aluminum.

In another aspect of the present invention, a method for preparing an aluminum capillary tube of a refrigeration system includes the steps of:

s1, providing a tube blank made of an aluminum alloy material;

s2, multi-stage drawing: injecting drawing lubricating oil and inserting a moving core head into the tube blank, enabling one end of the tube blank to penetrate through a tube reducing die of drawing equipment, clamping the tube blank by using a jaw of the drawing equipment, starting the drawing equipment to draw the tube blank, and spraying the lubricating oil to the tube blank and the tube reducing die in the tube blank drawing process;

s3, replacing the pipe contracting dies and the floating core heads with different specifications and repeating the step S2, and then drawing to form the aluminum capillaries with different specifications.

Preferably, in S2, the drawing device is a red copper capillary drawing device.

Preferably, in S2, the drawing speed of the drawing device is 190 to 210 r/min.

Compared with the prior art, the cost of the aluminum alloy capillary tube produced by the process is only one fourth of that of the copper capillary tube, and the processed capillary tube has stable flow rate and meets the requirement of the capillary tube for a refrigeration system. On the other hand, the invention also effectively reduces the usage amount of copper, saves the cost and is suitable for popularization.

Detailed Description

The present invention will be further illustrated with reference to the following specific examples.