Car radiator from the water chamber, the water chamber and the radiator core and other three parts. The coolant flows in the radiator core and the air passes through the radiator. The hot coolant is cooled by cooling the air, and the cold air heats up by absorbing the heat from the coolant.
According to the radiator in the direction of the coolant flow can be divided into longitudinal and cross-flow radiator two. According to the structure of the radiator core can be divided into heat sink tube heat sink, tube heat sink and plate heat sink core. Automotive radiators are generally divided into water cooling and air cooling. Air-cooled engine cooling is to rely on the flow of air to take away the heat in order to achieve the effect of cooling. The outside of the cylinder of the air-cooled engine is designed to form a dense sheet-like structure, thereby increasing the heat dissipation area to meet the cooling requirements of the engine. Air-cooled engine compared to the most used water-cooled engine is light weight, easy maintenance and so on. Water cooling is the tank radiator is responsible for the cooler with a high temperature of the engine cooling; water pump task is to let the cooling fluid in the entire cooling system circulation; fan operation using the ambient temperature directly blown to the radiator, making the radiator high temperature The coolant is cooled; the thermostat controls the coolant cycle to store the coolant.
There are two main types of car radiators: aluminum and copper, the former for general passenger cars, which for large commercial vehicles. Automotive radiator materials and manufacturing technology developed rapidly. Aluminum radiator with its light weight in the material on the obvious advantages in the field of cars and light vehicles gradually replace the copper radiator at the same time, copper radiator manufacturing technology and technology has made great progress, copper brazing radiator in the bus, Engineering machinery, heavy trucks and other aspects of the engine radiator obvious advantages. Foreign car supporting the radiator for the aluminum radiator, mainly from the perspective of environmental protection to consider (especially Europe and the United States). In the European new car, the proportion of aluminum radiators accounted for an average of 64%. From the development prospects of China's automotive radiator production, brazing production of aluminum radiator gradually increased. Brazing copper radiators are also used in buses, trucks and other engineering equipment.
Third, the structure
Automotive radiator is an indispensable part of the cooling system of automotive water-cooled engines, and is moving in the light, efficient and economical direction. Car radiator structure is also constantly adapt to the new development. Segmental radiator core is composed of many fine cooling tube and heat sink, cooling pipe mostly use flat circular section, in order to reduce air resistance, increase the heat transfer area. Radiator core should have a sufficient flow area, so that coolant through, but also should have enough air flow area, so that enough air to take away the coolant to the heat sink heat. But also must have enough heat dissipation area to complete the heat exchange between the coolant, air and heat sink. Tubular radiator is made of corrugated radiating and cooling tubes. Compared with the tube-type heat sink, the tube-type radiator under the same conditions, the cooling area can be increased by about 12%, while the heat dissipation on the open airflow similar to the blinds to break the flow of air in the heat On the adhesion layer, improve the cooling capacity.
Fourth, the principle
The function of the car cooling system is to keep the car in the proper temperature range under all operating conditions. The cooling system of the car is air-cooled and water-cooled. Air as the cooling medium known as the air-cooled system to coolant for the cooling medium known as the water-cooled system. Usually the water cooling system consists of water pump, radiator, cooling fan, thermostat, compensating bucket, engine body and cylinder cover in the water jacket and other ancillary devices and other components. Among them, the radiator is responsible for the cooling of circulating water, its water pipes and heat sinks made of aluminum, aluminum pipes made of flat shape, heat sink with corrugated, pay attention to heat dissipation, the installation direction perpendicular to the direction of air flow, as far as possible Do a little wind resistance, cooling efficiency is higher. The coolant flows in the radiator core and the air passes through the radiator core. The hot coolant is cooled by cooling the air and the cold air heats up by absorbing the heat dissipated by the coolant, so the radiator is a heat exchanger.
Fifth, use and maintenance
1, the radiator should not be in contact with any acid, alkali or other corrosive properties.
2, the proposed use of soft water, hard water to be softened after use, to avoid causing the internal heat block and scale generation.
3, the use of antifreeze, in order to avoid corrosion of the radiator, be sure to use regular manufacturers and in line with national standards of long-term anti-rust antifreeze.
4, in the installation of the radiator process, please do not damage the radiator (film) and bumps radiator to ensure the cooling capacity and sealing.
5, the radiator completely re-water and then water, the first engine block to open the water switch twist open, when the water out, and then closed, so as to avoid the blisters.
6, in daily use should always check the water level, to stop cooling after the water. When the water is added, the tank cover is opened slowly and the operator's body should be kept away from the water inlet to prevent high pressure steam from being burned by the nozzle.
7, in the winter to prevent freezing caused by the phenomenon of core, such as long-term parking or indirect parking, the water tank cover and the water switch, the water will be released.
8, spare radiator effective environment should be kept ventilated, dry.
9, depending on the actual situation the user should be 1 to 3 months on the radiator for a complete cleaning of the core. When cleaning, rinse with water to the side.
10, the water level gauge should be cleaned every 3 months or depending on the actual situation, the parts removed with warm water plus non-corrosive detergent cleaning.
Six, maintenance and repair
Automotive radiator as the internal heat transfer components of the car, the car plays an important role, the car radiator material is mainly aluminum or copper, radiator core is its main components, containing coolant, popular The car radiator is a heat exchanger. And for the maintenance and maintenance of the radiator, most of the owners are just a little knowledge, the following I introduce the daily car radiator maintenance and maintenance. Radiator and water tank together as a car cooling device, on its material, the metal is not resistant to corrosion, it should avoid its acid and other corrosive solution in contact with, so as not to be damaged. For car radiators, the blockage is a very common fault, reduce the occurrence of clogging, which should be injected soft water, hard water to be softened and then injected to avoid the scale caused by car heatsink blockage. Winter weather is cold, the radiator is easy to freeze and frost, so antifreeze should be added to avoid freezing of water. In the daily use should always check the water level, to stop cooling after the water. When the car radiator to add water, the tank cover should be slowly open, the owner and other operating personnel should try to stay away from the body, so as not to high-pressure high temperature oil and gas spout caused by staff burns.