HITACHI VFD Frequency Converter WJ200-075LFU

09/11/2022

Torque Motor: Structure, Features, Types, Application

Torque motor is a special motor with a large number of poles, which can run continuously without causing damage to the motor even when the motor is at low speed or even blocked.

07/04/2020

The compressor lacks oil, so the harm is so great!

The compressor lacks oil, so the harm is so great! Compressors are complex machines that operate at high speeds. Ensuring adequate lubrication of moving parts such as compressor crankshafts, bearings, connecting rods, and pistons is the basic requirement for maintaining normal operation of the machine.

08/20/2020

Don't blindly repair the refrigeration compressor if it fails to contact the manufacturer is the best policy

The environmental temperature and humidity test box is mainly used for product temperature, humidity alternating and high and low temperature rapid alternating cycle tests, and its purpose is to detect the reliability of products under high and low temperature impact tests.

07/11/2020

Screw air compressor maintenance

Screw air compressor maintenance 1. Air intake filter The air filter is a component that filters out air dust and dirt. The filtered clean air enters the screw rotor compression chamber to be compressed.

06/29/2020

Suggestions for troubleshooting of compressor with liquid start

07/07/2020

Future trends of semi-hermetic screw compressors Unseen companies may be eliminated

Future trends of semi-hermetic screw compressors Unseen companies may be eliminated From single screw to single-machine two-stage, from ordinary type to frequency conversion, environmental protection, energy-saving type, from single product to system solutions, the development of semi-hermetic screw compressors has never stopped, and has continuously penetrated into major refrigeration projects.

07/31/2020

What are the failures of the air conditioning refrigeration system (R410A)

When it is assumed that the system is blocked by welding, first check whether the system pressure and current are normal. You can use a pressure gauge to measure the suction pressure.

06/14/2020

Rotor compressor

The rotor compressor is driven by the engine or the motor (mostly driven by the motor), and the other rotor (also known as the female rotor or the concave rotor) is driven by the oil film formed by the main rotor through oil injection, or by the main roto器2䀀
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08/09/2020

Treatment method of liquid nitrogen external diarrhea

Liquid nitrogen: liquid nitrogen. It is inert, colorless, odorless, non-corrosive, non-flammable, and extremely low temperature. Nitrogen constitutes most of the atmosphere (78.03% by volume, 75.5% by weight).

07/13/2020

Two products support half of Danfoss refrigeration business

Danfoss commercial compressor nameplate changes Danfoss piston compressors and scroll compressors have adopted a new nameplate since December 2015. At the same time, the compressor product brand and brand logo have also been adjusted.