Danfoss Compressor SH301A9ALJ

08/02/2020

Correctly distinguish between two-in-one supply and three-in-one supply for central air conditioning

To put it simply, the so-called "dual supply" is to use an air energy heat pump system to provide two combined functions of "hot water + heating" or "heating + refrigeration"; "triple supply" is to provide "air conditioning + floor heating + Three combined functions of "hot water".

05/23/2025

How to select the thermal expansion valve？

1. The role and classification of expansion valves<br></br> Expansion valve is an important part of refrigeration system, generally installed between liquid storage cylinder and evaporator. The expansion valve causes the medium temperature and high pressure liquid refrigerant to become low temperature and low pressure wet vapor through its throttling, and then the refrigerant absorbs heat in the evaporator to achieve the cooling effect.

03/26/2025

How Refrigerator Compressor Works (Structure Diagram, Working Principle Diagram)

For a refrigerator product, the most core part is the compressor. If the refrigerator does not have a compressor with good quality and technology

06/14/2020

Analysis of common failure causes of totally enclosed refrigeration compressor

Analysis of common failure causes of totally enclosed refrigeration compressor Running end (R), starting end (S), common end (C), the resistance between RS is greater than that between SC and RC. The resistance between RS is equal to the resistance betweﰸ2䀀
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08/24/2020

Is the owner responsible for the accidental fall of the air conditioner

A certain car sales company found the defendant Gao to repair it because the air conditioner in the 4S shop it operated failed. Because Gao couldn't complete the maintenance work alone, he invited his coworker Chen to work together.

01/01/2025

How Does a Refrigeration Compressor Work? With Animation for Each Type

Refrigeration compressor is a kind of driven fluid machinery, which promotes low-pressure gas to high-pressure gas and is the heart of refrigeration system.

08/09/2020

Do you know the selection criteria of electronic valves for cold storage systems

In the cold storage refrigeration system, the selection of components must strictly abide by the four basic principles of safety, reliability, applicability and economy.

07/07/2020

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

08/19/2020

What if the central air conditioner leaks for no reason

Why does the central air conditioner leak? Is it a defect in the central air conditioner design itself, a loophole in the installation process, or improper use? Let’s break it down in detail below.

08/26/2020

Types of refrigerants and leak detection methods

Refrigerants are also called refrigeration working fluids, commonly known as refrigerants in some areas in the south. It is a working substance that continuously circulates in the refrigeration system and achieves refrigeration through its own state changŸ