Yaskawa Servo Drive SGD7J-02AFA2C

03/28/2025

Comparison of advantages and disadvantages of dry evaporator and flooded evaporator

The refrigerant of the dry expansion evaporator evaporates in the tube. The superheat at the outlet end of the evaporator is usually about 5 to 10K. The expansion valve uses the superheat detected by the temperature sensor to adjust the refrigerant flow r碌7館2䀀締眪湠眷V

08/11/2020

How does the screw compressor match the refrigerating oil correctly

The role of the compressor in the refrigeration system is equivalent to the human heart. With the development of the market, screw compressors have gradually become the leader of refrigeration compressor products and are used in various cold chains

09/06/2020

Classification of solenoid valves

Direct acting solenoid valve 　　 Introduction: 　　There are two types: normally closed and normally open. The normally closed type is closed when the power is cut off.

08/02/2020

How to judge the presence of air in the air conditioner

In the refrigeration system, the non-condensable gases are mainly nitrogen, oxygen, hydrogen and water vapor in the air; because these working fluids do not condense with the refrigerant, they generally gather in the condenser or the liquid reservoir.

07/07/2020

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

08/12/2020

Central air conditioning chiller water system and ventilation system cleaning method

The central air-conditioning ventilation system mainly includes air ducts, fresh air ducts, central air-conditioning wind cabinets, air supply outlets, air-sealing outlets, air handling units, and fan coils.

07/31/2020

HVAC people collect these data, better than ten years of work experience!

HVAC people, we know that the HVAC project contains more systems, the situation is complicated, and most of the pipelines are hidden in the tube wells, walls, and ceilings, so the design process is very complicated, but don’t worry, we can step on the predecessors’ Go forward on your shoulders!

06/14/2020

Refrigeration compressors have five major technological

Refrigeration compressors have five major technological developments around energy saving CFCs and HCFCs refrigerants that have a destructive effect on the ozone layer are phase-out substances specified in the Montreal Protocol

06/14/2020

An accident analysis of refrigeration compressor

An accident analysis of refrigeration compressor A major refrigerator damage accident occurred in the refrigeration workshop of a meat joint processing plant. The refrigeration workshop of the factory was equipped with 2 single-stage two-stage ammonia re器2䀀
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06/14/2020

Pharmaceutical freeze dryer composition system introduction

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