HITACHI VFD Frequency Converter SJ700-007HFF2

06/29/2020

Compressor protection measures against liquid strikes

Compressor protection measures against liquid strikes When too much liquid enters the cylinder and it is too late to discharge it from the exhaust valve, a liquid blow will occur in the cylinder. The high pressure generated during the liquid blow damages the cylinder, piston, connecting rod, etc., so it is necessary to take a Series of protective measures.

07/07/2025

Working principle of air compressor

An air compressor (air compressor) is a device used to compress gas. The structure of air compressor and water pump is similar. Most air compressors are reciprocating piston type, rotating blades or rotating screws. Centrifugal compressors are very large applications.

06/29/2020

How the compressor works

06/14/2020

Bacteria in fresh meat cabinets, I want to destroy you on behalf of the moon!

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12/23/2020

Air separation equipment and industrial gas are dependent on each other

Air separation equipment is used to produce high-purity gas and is one of the core equipment in the industrial field. The complete set of air separation equipment uses cryogenic rectification separation technology to separate air to produce high-purity oxygen, nitrogen, argon and other gases, which are widely used in various fields of the national economy.

07/19/2020

Types of refrigeration compressors for industrial chillers

The energy efficiency ratio of the chiller compressor of the chiller unit determines the energy efficiency ratio of the entire refrigeration system. Since the ambient temperature changes, the compressor is in a partial load state most of the time, so the compressor must have energy regulation.

08/07/2020

Cautions for safe use of air conditioners

Home appliances are the most frequently touched appliances in our daily lives, but fires and other hazards caused by improper use are not uncommon.

08/27/2020

Design and Application of Universal Crank and Connecting Rod Mechanism

First, let me introduce the function of the crank connecting rod mechanism to the internal combustion engine: 1) convert heat energy into mechanical energy; 2) piston reciprocating linear motion becomes crankshaft rotation motion; 3) output continuous power to related transmission devices.

08/06/2022

FANUC Spindle Amplifier Alarm Codes and Solutions (4)

The following is a continuation of the previous article, and introduces FANUC spindle drive alarm codes 74-88. Besides, other alarm codes are also introduced.

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.