Delta VFD Frequency Converter VFD075M43A

08/17/2020

What are the effects of water quality on water-cooled chillers

If the cooling performance of water-cooled chillers is to be kept in a stable state, very strict requirements on the water source are required. In the daily use of chillers, if the company does not pay enough attention to the quality of the water source

08/07/2020

Air source heat pump purchase skills

Air source heat pump products can not only replace coal-burning stoves in rural areas for heating, but also replace urban thermal central heating.

09/05/2020

The problem of motor inefficiency

The test standards promulgated by the International Electrotechnical Commission IEC (hereinafter referred to as IEC) make it possible to evaluate the energy efficiency of motors.

07/07/2020

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

01/06/2025

What is the principle of the chiller shell and tube evaporator

The cold water shell and tube evaporator is made by expanding two-layer metal plates with high-pressure gas or by mechanical pressing. It can also be made of aluminum alloy die-casting.

05/07/2022

Working Principle of 5 Kinds of Solenoid Valves?

When the power is on, the electromagnetic coil generates electromagnetic force to lift the closing part from the valve seat and open the valve

06/14/2020

The specific operation method of screw refrigeration compressor maintenance

Before the screw compressor must be overhauled, if possible, unload the slide valve to the "0" position, shut down normally, and cut off the power supply. The pipeline connected to the compressor should be cut off and the refrigerant and lubricating oil i器2䀀
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07/13/2020

Danfoss training-common faults and analysis of compressors

Danfoss training-scroll compressor I participated in Danfoss' service provider training and learning twice a week this week, mainly on scroll compressors (MLM series, MLZ series, LLZ series), and the recently hot scroll compressors for heat pumps (SH series, PSH series) ). And analyze the common faults of the compressor and exchange solutions.

10/04/2023

Refrigerated Air Dryer: Everything You Need to Know

If you work in an industry that requires compressed air, you know that moisture is a common problem. When compressed air is cooled, it can condense, leading to water droplets that can damage equipment, cause corrosion, and affect the quality of the final product. That's where refrigerated air dryers come in.

07/22/2020

The refrigerator is not cooling, and the compressor ‘buzzes’ after turning on the battery for a few seconds. What's the matter?

A few days ago, I received a call from a customer asking for repairs, saying that her refrigerator had suddenly stopped cooling in the past two days. The light bulb in the plug-in fresh-keeping room was on, and no movement was heard.