The heat sink occupies an important role in the composition of the radiator. In addition to the active heat dissipation of the fan, evaluating the quality of a radiator largely depends on the heat absorption and heat conduction ability of the heat sink itself. Next, Chicco will introduce the heat sink in detail~

Introduction of heat sink

1. Pure aluminum heat sink

This kind of heat sink is currently one of the most used heat sinks, and the whole is made of pure aluminum. Aluminum, as the metal with the highest content in the earth’s crust, has low cost and low heat capacity. Although it absorbs heat slowly, it releases heat quickly. The heat dissipation effect is proportional to its structure and workmanship. The more heat sinks, the bottom The better the polishing, the better the heat dissipation effect, but it is also restricted by its manufacturing process. Generally, the minimum spacing of the radiator grooves using aluminum extrusion manufacturing technology can only be 1.1 mm. The heat dissipation principle is also the simplest: use the heat sink on the radiator to increase its contact area with the air, and then use the fan to accelerate the air flow to take away the heat on the heat sink. The price of this kind of heat sink is also the lowest, and the heat dissipation effect is the worst compared with the following types of heat sinks.

2. Pure copper heat sink

The only difference between this kind of heat sink and aluminum heat sink is that the material is changed to pure copper, because copper has an inherent advantage compared with aluminum: the heat conduction efficiency is 412w/mk, which is nearly double the 226w/mk of aluminum , But copper also has a congenital shortcoming: the heat capacity is too high, that is to say, this kind of heat sink absorbs heat quickly but releases heat slowly, and the physical precipitation of heat in the copper sheet is very large. It needs to be matched with a high-power and high-speed fan. In order to achieve the desired effect. Because of the good toughness of copper, the manufacturing process is much easier than that of aluminum. There are folding type, tooth type, etc. The density of the heat sink can be higher than that of aluminum, and the heat dissipation area is correspondingly larger. To make up for the lack of slow heat dissipation caused by its high heat capacity, but the unit cost and manufacturing cost of pure copper are much higher than that of aluminum, which directly leads to the high price of this kind of heat sink. Although the price is high, the heat dissipation effect is better than that of aluminum. much better.

3. Copper-inlaid aluminum heat sink

This kind of radiator can be said to solve the contradictory relationship between copper and aluminum in an economical way-the aluminum heat sink with a copper block in the middle, uses the copper block to contact the CPU, and uses the rapid heat absorption of copper to absorb the CPU. Heat, and then use the rapid heat release of aluminum to release the heat on the copper block. This heat dissipation effect is better than that of a single pure copper or pure aluminum heat sink, but it is far less effective than pure silver. The reason is simple: copper embedded The manufacturing process of the heat sink is based on the principle of thermal expansion and contraction. After the aluminum heat sink is heated to a certain temperature, the copper block prepared in advance is embedded. When the temperature of the aluminum drops, the copper block is contracted to tighten It is tightly packed together, but copper and aluminum cannot make 100% contact, so the heat transfer efficiency will be affected to a certain extent, but the advantage is that the price is cheap, basically you can buy it for tens of dollars, which is better than the starter For a pure copper heat sink of hundreds of dollars, it is economical and effective, and the effect is good.

4. Die-cast copper aluminum heat sink

This kind of heat sink looks like a copper-embedded heat sink at first glance, and there is also a piece of copper on the base, but the difference is: the copper block on this type of heat sink does not use the principle of thermal expansion and contraction like the copper-embedded heat sink. The embedded ones use the most advanced die-casting technology, which can be said to be a completely seamless connection. Therefore, no matter how you look and touch, you will never feel any gaps on the connecting line between the copper block and the aluminum seat. The thermal conductivity between the copper block and the aluminum base is fundamentally guaranteed, so it has super heat dissipation performance.

Precautions for choosing heat sink

The current heat sink has basically bid farewell to the age of cast iron heat sinks, replaced by copper-aluminum composite heat sinks, which have fast heat transfer, high pressure resistance, beautiful decoration, and water and air heating. With its characteristics, it is now widely used in luxury buildings such as residences, hotels, hospitals, and office spaces. Therefore, when choosing a heating radiator, both practicality and decoration should be taken into consideration, not only safety and reliability, good heat dissipation effect, but also exquisite workmanship and beautiful appearance. This summarizes the following two points

1. Conditions of use

Be sure to clarify the conditions of use of the product when purchasing. For example, some companies clearly indicate in the product manual that the product is suitable for closed systems, the circulating water quality needs to be neutral, and the radiator needs to be fully maintained during non-heating periods. When calculating the amount of radiator used, various factors that affect the room temperature should be considered, and the principle of "larger than smaller" should be adhered to to avoid the phenomenon of low room temperature.

2. Choose well-known manufacturers

Chicco radiator reminder: When purchasing a company’s products, it is generally necessary to purchase its accessories at the same time, to avoid mismatch between other manufacturers’ accessories and the radiator, which may cause accidents during installation or use, or when an accident occurs, the responsibility cannot be defined . When choosing a business, you must choose a business with a good brand image and integrity.