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The power of high-voltage inverter equipment is relatively large, and 4% of the power loss is mainly lost in the operating environment in the form of heat. If the temperature problem of the working environment of the inverter room cannot be solved in a timely and effective manner, the operation safety of the inverter body will be directly endangered; eventually, the overheating protection action of the inverter will trip due to the high temperature. In order to ensure a good operating environment for the inverter, measures must be taken to control the temperature of the inverter and the operating environment.

2. Cooling method

Through the accumulation of inverter engineering application experience, we provide complete inverter cooling system solutions on site for different application environments. Several commonly used cooling methods mainly include: ⑴ air duct open cooling; ⑵ air-conditioning closed cooling; ⑶ air-water cooling closed cooling; ⑷ equipment body water cooling; ⑸ combined cooling of the above methods.
1. Open air duct cooling

1.1 Cooling process
The cold air enters the frequency converter through the filter screen of the ventilation inlet of the frequency conversion room, and after cooling the body, the hot air is discharged from the air outlet of the frequency converter air duct.

1.2 Installation method

The cooling installation with open air duct is relatively simple. You only need to open two ventilation inlets on the wall of the frequency conversion room, install a filter screen, and then lead out the air outlet air duct on the top wind cover of the frequency converter.

2.3 System Features

(1) Rapid and efficient cooling; (2) Child lock function to prevent misuse; (3) Wide-angle air supply, uniform and comfortable room temperature; (4) Anti-cold wind design, comfortable air supply; (5) Independent dehumidification; (6) Low temperature , Low voltage start; (7) outdoor unit high temperature operation; (8) indoor airtight cooling;(9) There is a margin for cooling power.

3. Air-water cooling airtight cooling

3.1 Basic principles
The air-water cooling system is a highly efficient, environmentally friendly and energy-saving cooling system, and its application technology is in a leading position in China.
The hot air from the inverter is connected to the radiator with fixed water-cooling pipes through the air pipe, and the cold water with a temperature lower than 33°C passes through the radiator. After the hot air passes through the heat sink, it transfers heat to the cold water and becomes cold air from The heat is blown out from the heat sink, and the heat is taken away by the circulating cooling water to ensure that the ambient temperature in the inverter control room is not higher than 40°C.

The air cooler must be installed in a closed environment. In order to improve the cooling effect, the space for placing the equipment should be as small as possible. The water flowing into the air cooler is industrial circulating water. In order to protect the equipment, the PH value of the circulating water is required to be neutral and free of impurities that corrode and damage copper and iron. The water pressure of the incoming water is generally 0.2-0.3Mpa, and the incoming water temperature is ≤33 ℃.
The maintenance of the air cooler is simple and easy. Generally, it is maintained once every six months to flush the cooling pipes.