HITACHI VFD Frequency Converter NES1-040HFC

03/01/2021

Characteristics of permanent magnet synchronous servo motor

(1) High power factor and high efficiency; (2) Simple structure and reliable operation; (3) Small size, light weight and small loss. Compared with other kinds of motors

06/25/2025

Common Types of Refrigeration Compressors: A Comprehensive Guide

When mentioning refrigeration, everyone in this modern world may be familiar with it. People's daily use of air conditioners, refrigerators, whether small household or large commercial ones, are refrigeration appliances.

06/21/2020

[Experience] What happens if the compressor suction pressure is too high and the discharge pressure is too high

[Experience] What happens if the compressor suction pressure is too high and the discharge pressure is too high Compressor suction pressure is too high, discharge pressure is too high 1. Too much refrigerant. Too much refrigerant will cause the suction pressure and discharge pressure to be too high at the same time. This is because when too much refrigerant fills the reservoir, it will occupy a part of the condenser volume, reducing the heat dissipation area and causing the condenser Poor condensation. Discharge excess refrigerant from the low-pressure side.

12/17/2021

How to Reduce Noise of Air Compressor?

Air compressors can provide stable air flow with little pressure fluctuation, which has the advantages of stable rotation and high efficiency.

08/15/2020

The main cause of cold storage fire is cold storage installation or cold storage construction

In recent years, we have seen a lot of news about cold storage fires. Once a cold storage causes a fire, it will not only cause economic losses to us, but also may cause safety problems.

08/18/2020

How to deal with the failure of the refrigerator to start and high-pressure failure

Nowadays, the application range of refrigerators is relatively wide. Although domestic refrigerators have high performance, certain failures will occur during use.

06/14/2020

The harm and elimination method of air intake in refrigeration system

The harm and elimination method of air intake in refrigeration system 1 Overview In the refrigeration system, the so-called non-condensable gas means that when the refrigeration system is working, at a specific temperature and pressure in the condense器2䀀
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06/28/2020

One article to understand what is a piston compressor

One article to understand what is a piston compressor Piston compressor is a compressor that relies on live cold reciprocating motion to pressurize gas and deliver gas. It belongs to positive displacement compressor, also known as "reciprocating piston compressor" or "reciprocating compressor".

01/08/2025

17 centrifugal compressor manufacturers,in the world. how many do you know

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07/07/2020

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