COSEL Power Supply DHS50B15

09/23/2025

AC Making Noise When off: Where is the Noise from and What to Do?

If you’ve ever heard your AC making noise when off, it can be a bit unnerving. You may wonder what's causing the noise and what you can do to fix the problem.

07/24/2020

Combined air conditioning installation operation and daily maintenance

installation:<br></br> 　　 Unit installation and construction,<br></br> 1. Preparation before installation<br></br> 　　 (1) Familiarize with and review all relevant drawings and documents, and check whether the unit placement position and basic dimensions meet the requirements.<br></br>

09/07/2020

Three major aspects to improve the energy efficiency of air compressors

As we all know, as a compressed air preparation device, an air compressor consumes a lot of power. In the life cycle cost of an air compressor, energy consumption accounts for up to 75%, which is several times the purchase cost of an air compressor.

08/18/2020

Basic composition of industrial chiller refrigeration system

We must fully understand the components of the industrial chiller refrigeration system in order to be foolproof in use.<br></br> 　　1. Condenser: In the refrigeration process, the condenser plays a role in outputting heat energy and condensing the refrigerant.

07/17/2020

Cause Analysis and Treatment Method of Copper Tube Leakage of Evaporator of Single Cooling Unit

Cause Analysis and Treatment Method of Copper Tube Leakage of Evaporator of Single Cooling Unit A central air-conditioning system in a public area uses a screw chiller. During operation, a copper tube in the evaporator leaks due to a malfunction. After further inspection by the technical staff, it was confirmed that the fault was leakage of the copper pipe of the evaporator of the chiller.

08/24/2020

Six steps to prevent ice blockage in refrigeration equipment maintenance

Ice blockage has always been a common failure of refrigeration equipment. In which part of the maintenance is it caused? The following are the correct operation methods for the 6 key links that may cause ice blocking in the maintenance of large refrigeration equipment:

08/23/2022

Ways to Increase Stepper Motor Torque and Select Stepper Motor

Reduce the number of turns to reduce inductance L: select the motor with small inductance L from the standard products of the motor manufacturers, the rated current will increase.

07/06/2020

Air Compressor Market product type, technology, lubrication, application, key Players and region Analysis

The dramatic spread of COVID-19 has created a marginal impact on the global air compressor market. The sustainability of the air compressor market is mainly attributed to the significantly increasing demand from various industries such as oil & gas, healthcare, chemical manufacturing, and many others. In addition, it is expected that the demand for the air compressor will be ultimately restored after the outbreak of COVID-19.

07/07/2020

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

09/08/2020

The development history of air compressor

A device used to increase air pressure. We call it an air compressor. There are thousands of types. The most common ones are piston air compressors, screw air compressors, scroll air compressors, and sliding vane air.