Mobile Phone LCD Screen Quality Control Expert

Car Cooling System is divided into two types

by:Kimeery     2020-03-17
Liquid cooling and air cooling. The cooling system of the liquid-cooled car circulates liquid through pipes and channels in the engine. When the liquid flows through the high-temperature engine, it absorbs heat, thus reducing the temperature of the engine. After the liquid flows through the engine, it flows to the heat exchanger (Or radiator) The heat in the liquid is emitted to the air through the heat exchanger. Air-cooled some early cars use air-cooled technology, but modern cars hardly use this method. This cooling method is not to circulate liquid in the engine, but to dissipate heat from the cylinder through aluminum sheets attached to the surface of the engine cylinder. A powerful fan cuts the aluminum sheet to dissipate heat into the air, thus cooling the engine. Because most cars use liquid cooling, there are a large number of pipes in the cooling system in the pipeline system car. After the pump transports the liquid to the engine block, the liquid begins to flow in the engine passage around the cylinder. Then, the liquid returns to the thermostat through the cylinder head of the engine where the liquid flows out of the engine. If the thermostat is closed, the liquid will flow directly back to the pump through the pipes around the thermostat. If the thermostat is turned on, the liquid will first flow into the radiator and then flow back to the pump. The heating system also has a separate cycle process. The cycle starts from the cylinder head to transport liquid through the heater bellows and then flows back to the pump. For cars equipped with automatic transmissions, there is usually an independent circulation process to cool the transmission oil built into the radiator. The transmission oil is pumped by the transmission through another heat exchanger in the radiator. Liquid cars can work in a wide temperature range from far below zero degrees Celsius to far above 38 degrees Celsius. Therefore, no matter what kind of liquid is used to cool the engine, it must have very low freezing point, high boiling point and can absorb a large amount of heat. Water is one of the most effective liquids to absorb heat, but the freezing point of water is too high to apply to automobile engines. Most cars use a mixture of water and ethylene glycol (C2h6o2), Also known as antifreeze. By adding ethylene glycol to water, the boiling point and freezing point can be significantly increased. Whenever the engine is running, the pump will circulate the liquid. Similar to the centrifugal pump used in a car, the water pump transports the liquid to the outside through centrifugal force during operation and continuously sucks the liquid from the middle. The inlet of the pump is located closer to the center, so the liquid returned from the radiator can reach the pump blade. The pump blade sends the liquid to the outside of the pump, where the liquid enters the engine. The liquid flowing out of the pump first flows through the engine block and cylinder head, then flows into the radiator, and finally returns to the pump. Engine cylinder and cylinder head have many channels made of casting or machining to facilitate liquid flow. If the flow of liquid in these pipelines is stable, only the liquid in contact with the pipeline will be cooled directly. The amount of heat transmitted from the liquid flowing from the pipeline to the pipeline depends on the temperature difference between the pipeline and the liquid in the contact pipeline. Therefore, if the liquid in contact with the pipeline is cooled quickly, the heat transmitted will be less. By manufacturing turbulence in the pipeline and mixing all liquids, the liquids in contact with the pipeline are kept at high temperatures to absorb more heat, so that all liquids in the pipeline are effectively utilized. The transmission cooler is very similar to the radiator in the radiator, except that the oil does not exchange heat with the air, but exchanges heat with the coolant in the radiator. Pressure water tank cover pressure water tank cover can increase the boiling point of coolant by 25 ℃. The main function of the thermostat is to rapidly heat up the engine and maintain a constant temperature. It is achieved by adjusting the amount of water flowing through the radiator. At low temperatures, the outlet of the radiator will be completely blocked, I . e. all coolant will circulate again via the engine. Once the temperature of the coolant rises to 82- Between 91 ° C, the thermostat opens, allowing the liquid to flow through the radiator. When the temperature of the coolant reaches 93- The thermostat will remain open at 103 ℃. The car cooling fan is similar to a thermostat and must be controlled to keep the engine constant. The front wheel drive car is equipped with an electric fan because the engine is usually installed horizontally, I . e. the output of the engine faces one side of the car. Fans can be controlled by a thermostatic switch or an engine computer that opens when the temperature rises above the set point. These fans will turn off when the temperature drops below the set point. The cooling fan is equipped with a rear-wheel drive car with a longitudinal engine, usually equipped with an engine-driven cooling fan. These fans have a constant temperature control viscous clutch. The clutch is located in the center of the fan and is surrounded by the airflow flowing out of the radiator. This kind of special viscous clutch is sometimes more like a viscous coupler for a full-wheel drive car. When the car is overheated, open all windows and run the heater at full speed. This is because the heating system is actually a secondary cooling system that can reflect the situation of the main cooling system on the car. The heater duct system located on the car dashboard is actually a small radiator. The heater fan allows air to flow through the heating bellows before entering the passenger compartment of the car. The heater bellows is similar to a small radiator. The heater bellows absorbs hot coolant from the cylinder head and then reflows it back into the pump, so the heater can operate when the thermostat is turned on or off.
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