Microchannel condenser

Product Overview

The microchannel condenser is a cooling product of the automobile air conditioning system. It is installed inside the bumper of the car. Its main function is to cool the Freon in the air conditioning compressor, let the cooled Freon enter the evaporator, release cold air into the car, and keep the car at a comfortable temperature.

The microchannel condenser is an all aluminum product, which is aluminium fin, collector tubes, flat tubes, specially shaped bends, drying bottles and other parts. The flat tubes are microchannel types, such as 2*16mm flat tubes, which have 8-12 small channels, and these small channels can ensure that the condenser has a high pressure resistance.

With the development of industry and the popularization of aluminum brazing technology, as well as the rising cost of copper materials, more and more industries now use this aluminum condenser, such as household air conditioners, industrial cooling machines and other products.

Characteristics of microchannel condenser

• High voltage resistance

Because the flat tube is designed as a microchannel structure, it can operate stably at a pressure of 1.5 mpa. The factory producing condenser usually uses a pressure of 2.2 mpa for leak test.

• Extremely competitive prices

Compared with the condenser made of copper tubes, the price of this microchannel aluminum condenser is very competitive, which is why more and more industries use this condenser.

• Save Freon

Because the flat tube is a microchannel type, this condenser can save freon very much. The same cooling machine uses a microchannel condenser, which can save freon by 60%.

• Longer service life

Due to its use of aluminum brazing technology to weld all parts in one go, its product consistency is very good and it can be uses for a long time. If the car cannot collide, there is no need to worry about its service life.

Working principle of microchannel condenser

The working principle of all types of air conditioner condenser is basically the same. Now we will mainly explain the working principle of the condenser of the automobile air conditioner. In brief, the condenser is a cooling module.

It is to exchange heat between the high-temperature gaseous refrigerant discharged from the compressor and the air through the condenser to make the refrigerant return to the liquid state, and the liquid refrigerant enters the evaporator through the expansion valve.

The car blower sends the low temperature released outside the evaporator to the car, and the refrigerant inside the evaporator will return to the compressor for high-temperature gasification and enter the condenser, which is the working process of the condenser.

Design of microchannel condenser

1. The micro channel condenser with parallel flow structure adopts the design of large inlet and small outlet, that is, the first channel for high-temperature gaseous refrigerant entering the condenser is 50%, the second channel is 25%, the third channel is 15%, and the fourth channel is 10%. This design can greatly improve the heat transfer efficiency.

2. The overall dimensions of the condenser need to be matched according to the displacement of the engine and the efficiency of the space machine compressor in the car. If the size is too large, it will not only increase the cost, but also increase the weight of the car, which will also affect the fuel consumption. If the size is too small, it will affect the heat exchange efficiency, and the cooling in the car is too slow.

3. Each car has a different inlet diffuser. To avoid long-term use of the condenser in harsh environments, if necessary, the condenser needs to be spraying with a layer of black paint to increase the oxidation resistance of aluminum materials.

4. The microchannel condenser has parallel flow type and elbow type. Both types of products have advantages. The design engineer needs the installation space, heat exchange efficiency, production cost control and other factors of the car to choose the most suitable condenser for that car.

Micro channel condenser parts

To produce a complete microchannel aluminum condenser, It needs to involve many fields., such as CNC machining, aluminium tube extrusion production, aluminum brazing and other technologies. Let’s briefly understand the manufacturing process of each part.

1. Aluminum block parts

These parts are processed using CNC machining, as the size of the parts is very small, usually 15 * 20mm. They are produced using small CNC machines for automation.

2. Dry bottle

This part is also processed using CNC machining, and it also requires laser welding.

3. Microchannel flat tube

This part is produce by continuous extrusion. The aluminum material is softened at a high temperature of 280℃, and then pressure is applied using a hydraulic press. The aluminum material is extrusion from the mold to form a microchannel shape, which is then cooling and cut to the required length.

4. Collecting pipe

Most of the parts are round, but some tube are D shape. They are also produce by extrusion, cut the required length, and then use the stamping mold to open holes.

5. Aluminium fin

Usually, the factory of the microchannel condenser buys aluminum foil with the required width, and then the roller type machine produces aluminium fin. The fastest production speed of this fin machine reaches 120 meters per minute.

Microchannel condenser manufacture machine

How to produce condenser

Assembly and welding

When all the parts are ready, they can be assemble to form a complete condenser, and then high temperature aluminum brazing is carr out. All the parts are welding together at one time to achieve better brazing effect. Usually, some small parts need to be manually welding before brazing, and small parts can be fix to obtain better brazing effect and improve brazing qualification rate.

Leak test

The brazing condenser can be leak test, but some condenser bends are very special, these bends need to be welding manually, and some condenser need to be spraying with black paint.

Packaging and delivery

Usually, the condenser factory can customize the packaging box according to the customer’s requirements, including the quality and logo of the box. When the packaging is complete, it can be delivery.

Industrial microchannel condenser

There are many factories in the industrial field that need cooling equipment, such as pharmaceutical, brewing, beverage and other factories. As a key product of the cooling equipment, the microchannel condenser plays an important role. The difference between it and the automobile condenser is that the overall size is larger.

The size of the automobile condenser is usually 500*800mm, and the thickness is 16mm-26mm. The maximum size of the industrial microchannel condenser is about 1000*2200mm, and the thickness is 26mm-38mm.