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Four technical advantages of Mitsubishi Electric compressor

Four technical advantages of Mitsubishi Electric compressor Those who get the Central Plains get the world, those who get the compressor get the comfort, energy saving, mute and long service life of the central air conditioner. Mitsubishi Electric is a central air-conditioning brand that simultaneously masters the technology of dual-rotor, high-pressure cavity scroll and low-pressure cavity scroll compressors. A century-old brand, technology precipitation. The four advantages of Mitsubishi Electric compressor, let us see the whole thing. ■ The low-pressure cavity scroll compression structure specially designed and developed for large-capacity upper-outlet fan unit, linear frequency conversion takes into account energy saving and stability Traditional high-pressure cavity scroll compressor During the operation of the compressor, as the motor speed increases, the flow rate of the drawn refrigerant increases. Inhaled refrigerant may contain small amounts of liquid components. The capacity is limited to less than 10HP, and modules exceeding 10HP need to be combined with multiple compressors. Adopt side suction and top exhaust structure. The sucked refrigerant passes through the “buffer" in the lower part of the cavity before being compressed. The gaseous refrigerant is sucked into the scroll disk and directly compressed, and a small amount of liquid refrigerant enters the motor part under the action of gravity, evaporates into a gas after cooling the motor, and then enters the scroll disk for compression. The unique intake and exhaust structure allows the compressor to ensure good stability when responding to large capacity requirements, and the maximum capacity of the monomer can reach 20HP. There is only one compressor in a single module, and it can achieve linear adjustment without start and stop in response to changes in the air conditioning load from 0 to 100%. Compared with the combination of multiple compressors in the module, the running current (MCA) can be guaranteed to be lower, and the failure of the lubricant balance circuit between multiple compressors can be avoided. ■ Optimized scroll structure to reduce compression leakage and improve compression efficiency The improved scroll structure uses a combination of high-strength cast iron and special aluminum alloy materials, which not only improves the leakage loss caused by material deformation during high-speed operation, but also avoids the reduction of compression efficiency caused by over-compression under low load. ■ The rotor adopts the current NdFeB rare earth material with the best magnetic flux characteristics, and the torque of the motor with the same power input is stronger The built-in permanent magnet DC inverter compressor (IPM) superimposes the reluctance torque on the basis of the permanent magnet torque. The existence of the reluctance torque helps to improve the overload capacity and power density of the motor. Nd2Fe14B magnet with the strongest magnetic force in the rare earth family has the following characteristics: The motor has good thermal stability  Miniaturization High torque to achieve higher efficiency ■ DC brushless motor equipped with Mitsubishi Electric’s “keel motor" patent technology, part load efficiency is higher The distributed motor winding coil used in traditional compressors is limited by the integrated iron core and winding process. The winding gap between the teeth is very large, and the copper loss and iron loss of the motor are high. In the compressor of the CITY MULTI series multi-unit air conditioner (heat pump) unit, Mitsubishi Electric's unique "keel motor" patented technology was creatively introduced. It uses an articulated winding manufacturing process, which is closed and assembled after section winding, and inter-tooth winding The area of ​​the wire dead zone is minimized, all the windings are effectively used, and the copper loss and iron loss of the motor are reduced, and the motor efficiency is improved.

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