Danfoss Compressor SZ300A9AL

07/07/2020

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

03/01/2021

Performance comparison between servo motor and stepping motor

As an open-loop control system, stepping motor has essential connection with modern digital control technology. In the current domestic digital control system, stepping motor is widely used. With the emergence of all digital AC servo system, AC servo motor is more and more used in digital control system. In order to adapt to the development trend of digital control, stepping motor or full digital AC servo motor is mostly used as the executive motor in motion control system. Although they are similar in control mode (pulse train and direction signal), they are quite different in performance and application. This paper compares the performance of the two.

06/14/2020

Cause Analysis of Refrigeration Compressor Cannot Start or Stop Quickly After Start

Cause Analysis of Refrigeration Compressor Cannot Start or Stop Quickly After Start 1) First check the main circuit. Whether the power supply has power, whether the voltage is normal, whether the fuse has been blown due to starting overload

08/20/2020

Use and maintenance of central air-conditioning chillers

At present, central air-conditioning refrigerators are widely used, especially in shopping malls and other places with a large number of people. What are the cooling principles, system classification and maintenance methods of central air-conditioning refﰸ2䀀

09/09/2020

Classification of air filters

Air filter has three methods: inertia, filtration and oil bath. 　　①Inertial type: Since the density of impurities is higher than that of air, when the impurities rotate or make sharp turns with the air, the centrifugal inertial force can separate the impurities from the airflow.

06/14/2020

What is the difference between heating 24 ℃ and cooling 24 ℃

Regardless of the room temperature, as long as the air conditioner is in the cooling mode and is in a working state, the wind blown out is cold wind. To put it bluntly, the temperature of the blown air is determined by the operation mode of the air condit器2䀀
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08/24/2023

Heat Pump Troubleshooting Chart: A Comprehensive Guide to Diagnosing Common Issues

Heat pumps are an essential part of many homes, providing both heating and cooling functions. However, like any mechanical system, they can experience problems, which can be frustrating and costly for homeowners.

08/19/2020

【Rising posture】Home central air conditioner VS traditional air conditioner

With the development of the economy, people's home life quality has gradually improved, especially those who are willing to invest a lot of money in home decoration.

09/04/2020

In addition to reducing wear, mechanical lubrication has other functions

There are three types of lubrication: full-film lubrication, boundary lubrication, and mixed lubrication. They are in three different states, but they all rely on lubricating oil to lubricate and resist wear.

08/07/2020

Use and selection of water pumps for HVAC systems

1. Chilled water pump:<br></br> 　　In the chilled water loop, a device that drives water to circulate. The end of the air-conditioned room (such as fan coil, air handling unit, etc.)