Protechnic Fan MGA4024ZB-015

08/11/2020

Introduction to five common failures of screw chillers

Introduction to five common failures of screw chillers<br></br> 1. Screw chiller communication failure 　<br></br> The control of each module by the computer controller is realized through the communication line and the main interface board

07/22/2020

The ranking of compressor industry companies has changed so much

Due to the high technical threshold and high capital investment of the compressor industry, the concentration of the top five brands of the five major compressors in the industry has exceeded 63%, but the five major products also reflect different differentiation and evolution trends.<br></br>

07/07/2020

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

06/14/2020

HVAC knowledge

1. The expansion water tank is used in the heating system to store the amount of expansion water after the system is heated. It serves as an exhaust gas in the natural circulation for the lower return system. In addition, it can also function as a constanﰸ2䀀
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09/24/2025

4 Types of Safety Protection for Refrigeration Compressors (9 Common Protection Devices for Refrigeration Compressors)

When the compressor is running, some abnormal situations may occur, such as: the exhaust pressure is too high, the suction pressure is too low, the oil pressure is insufficient, the motor is overheated

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

08/15/2020

Failure Forms and Preventive Measures of Parts of Shell and Tube Heat Exchanger

1. The structure of the shell and tube heat exchanger<br></br> The shell and tube heat exchanger is a traditional and most widely used heat exchange equipment. Because it has a strong structure and can be made of a variety of materials

03/01/2021

Matters needing attention

1.Oil and water protection of servo motor 1) The servo motor can be used in the place that will be attacked by water or oil drops, but it is not completely waterproof or oil-proof. Therefore, the servo motor should not be placed or used in the environment of water or oil invasion. 2) If the servo motor is connected to a reduction gear, the oil seal should be filled when using the servo motor to prevent the oil of the reduction gear from entering the servo motor 3) The cable of servo motor should not be immersed in oil or water.

08/24/2020

Precautions for cold storage installation

Library refers to the use of artificial means to create an environment different from outdoor temperature or humidity. Pay attention to the following points when installing cold storage:

07/30/2020

How important is the installation environment of the refrigeration unit Doing these 4 points is enough!

The refrigeration equipment (compressor unit) is installed in the machine room, and the surrounding environment should be maintained:<br></br>