IFM Sensor PN3029

08/17/2020

Reasons and repair methods of screw damage of screw chiller

Screw chillers are named after the use of screw compressors. They are often used in large-scale industrial refrigeration such as chemical plants and central air-conditioning systems. Because the performance of screw chillers is more stable and efficient,

08/13/2020

The reason why the chiller is not cooling and there is no alarm prompt

In the process of operation, often when there is no cooling phenomenon, there is no alarm prompt, so that the operator has no way to start and does not know what caused this problem.

12/23/2022

What is an Erbium Doped Fiber Amplifier?

The erbium optical fiber amplifier (EDFA) is an optical amplifier made of optical fiber doped with erbium.

08/15/2020

Is the filter of the refrigerator clean or replaced

What is the filter of the refrigerator? Regardless of whether the refrigerator is air-cooled or water-cooled, there is actually a filter. The filter is generally used together with a desiccant, called a drier. What is the function of the filter?

02/13/2025

Advantages and disadvantages of screw refrigeration compressors

Screw refrigeration compressor is a rotary positive displacement compressor. It uses the change of the cogging volume and position of the screw to complete the process of vapor suction, compression and exhaust. Oil-free screw compressors came out in the 1930s, mainly used to compress air. Later, the oil-injected screw compressor appeared in the cylinder,

08/13/2020

Installation method and precautions of refrigeration compressor shock tube

In some special industries, the requirements for refrigerator products are still very high. It was the needs of different companies and industries in the market that allowed the rapid development of the refrigeration industry to today with so many users.

09/10/2020

Air compressor lubricant performance requirements

1. High quality base oil 　　 The base oil of compressor oil can be divided into two categories: mineral oil type and synthetic oil type. The production of mineral oil-type compressor oil is generally obtained by solvent refining, solvent dewaxing, hydrogenation or clay supplement refining to obtain the base oil, and then add a variety of additives to blend.

07/07/2020

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

08/26/2023

How Do I Know If I Have a Heat Pump or an AC? A Comprehensive Guide

If you're a homeowner, you may be wondering whether you have a heat pump or an air conditioner (AC) installed in your home. Both systems provide cooling during the summer months, but they work in different ways.

06/28/2020

Hitachi compressor model sample parameters

Hitachi compressor model sample parameters W Cooling Capacity Btu/h COP (A) Compressor (B)