Danfoss Compressor DSF155A3ABQ

08/21/2020

Collection of various types of faults and troubleshooting methods for central air-conditioning!(Ⅱ)

Collection of various types of faults and troubleshooting methods for central air-conditioning! 1.Failure and maintenance methods of fan coil

05/21/2025

Have you figured out the "enthalpy" and "entropy" of the refrigeration system?

1. Enthalpy<br></br> It is a kind of energy, used to indicate the thermal state parameter of the state of the refrigerant, it represents the size of the total energy of the refrigerant; namely:

07/07/2020

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

06/22/2020

What's the matter with air conditioning and cooling without heating

What's the matter with air conditioning and cooling without heating 1.First, it may be because the vents of the indoor unit and outdoor unit are blocked by something, or a lot of dust has accumulated on the filter inside the air conditioner; 2. It may be because the heat blown from the air conditioner is seriously lost; 3 2. It may be because the amount of refrigerant in the air conditioner is too small, which leads to a great reduction in the heat exchange efficiency, so that the air conditioner does not heat. <img src="{{media url=&quot;magefan_blog/What_s_the_matter_with_air_conditioning_and_cooling_without_heating3.jpg&quot;}}" alt="" />

09/10/2020

Ethylene plant training materials

Chapter One 　Typical Process of Ethylene Plant The first section 　 sequence separation process Section 2 Front deethane process Section 3 Front depropanization process Section 4 Low investment separation process Section 5 Progressive separation process Section 6 Oil absorption and separation process Section 7 Comparison of six separation processes

08/24/2020

What are the specific operation methods for cold storage screw compressor maintenance

1. Disassembly method of screw compressor in cold storage 　　 Before the screw compressor of the cold storage must be overhauled, if possible, unload the slide valve to the "0" position, stop normally, and cut off the power supply.

08/15/2020

How to control the heat dissipation problem when the air conditioner in the computer room is turned off

Most buildings will be equipped with air-conditioning or air-conditioning systems already installed. For companies that rent office areas, it is difficult for the building to provide a complete computer room.

09/11/2020

Comparison of ball bearings and roller bearings

Comparison of ball bearings and roller bearings From the point of view of the contact with the raceway: Ball bearings are in point contact, and the contact surface is ellipsoid; while roller bearings are in line contact, and when force is applied, the contact surface is square.

08/11/2020

Technology Refrigeration equipment system operation analysis and energy saving measures introduction

1.Economic analysis of refrigeration equipment system operation<br></br> The amount of cold produced by refrigeration equipment is directly related to the operating conditions of the system.

09/05/2020

The advantages of asynchronous motor over traditional permanent magnet motor

The asynchronous motor is a three-phase induction motor, not the rare earth permanent magnet motor used in traditional electric vehicles. What are the reasons for this? The difference between induction motors and permanent magnet motors.