Nais Relay SF4D5V

06/17/2022

What is A VFD?

A Variable Frequency Drive (VFD) is a type of motor controller that drives an electric motor by varying the frequency and voltage supplied to the electric motor.

07/31/2020

The reason why the freezer glass door is not closed tightly

The glass door of the freezer is not closed tightly. This problem occurs in both domestic and commercial freezers. When we are at home, we rarely pay attention to whether the door of the freezer can be closed tightly.

06/25/2020

How to solve if the air conditioner is not cooling

If it is not in the cooling state, we can adjust it to the cooling mode; if the dust accumulation of the air conditioner severely reduces the cooling function, we can find professional personnel to disassemble the evaporator, fan blade, and filter. Completely clean up; if it is because no refrigerant is added, then we can add refrigerant.

07/07/2020

Earth Hour: Hitachi Central Air Conditioner works with you to speak for the earth

09/01/2020

The most complete version｜Basic theoretical knowledge of compressed air (1)

1. Compression purpose 　　The basic purpose of gas compression is to deliver gas at a pressure higher than the original pressure. The original pressure level may vary from a very low absolute pressure (a few thousandths of a kilogram) to several thousand kilograms;

08/24/2020

The source of the new outbreak needs to be resolved. Is cold chain logistics still reliable

The source of the new outbreak needs to be resolved. Is cold chain logistics still reliable The origin of the epidemic in Beijing Xinfadi Wholesale Market is still an unsolved mystery.

07/24/2020

Air conditioning system fault diagnosis guide (Part 1)

"Refrigeration system low pressure, high pressure value abnormal", "compressor shell temperature abnormality", "air inlet and outlet temperature difference value abnormal", "air conditioner outlet temperature is too high or low",

09/21/2020

Application of synthetic lubricating oil in processing and hydrocarbon gas presses

1. Hydrocarbon and process gas compressor lubricants Historically, hydrocarbon, chemical processing and inert industrial gas compressors have used traditional mineral oil-based lubricants. However, mineral oil cannot meet the needs of many modern rotary compressor designs and other complex applications. A typical gas processing application is at an outflow temperature of 80-1100C and a pressure of 7-70barg.

09/15/2020

Dewatering device in Fusheng air compressor

During the compression work, part of the lubricating oil must be mixed into the compressed air, which will cause some failures in the pneumatic circuit, damage the pneumatic components, reduce the service life of the components, reduce the production efficiency, and even cause accidents.

09/11/2020

How to use empirical methods to inspect rolling bearings

How to use empirical methods to inspect rolling bearings Some operators lack the experience in identifying rolling bearings and continue to use them as long as they see no obvious damage to the rolling bearings, causing serious failures later. Some people only need to remove the rolling bearings and replace them without inspection.