HONGFA Relay HFD4-I-5

10/15/2025

Step-by-Step Guide on How to Clean a Laptop Fan with Figures

After the notebook has been used for a long time, if a large amount of dust accumulates on the fan.

04/21/2023

13 Reasons Why Your Samsung Refrigerator Not Cooling (The Latest Version)

Refrigerator plays an important role in our life, and it helps us keep food fresh, such as fruits, milk, eggs, vegetables, meat and so on.

06/14/2020

Method for preventing reverse rotation of refrigeration compressor in cold storage

Method for preventing reverse rotation of refrigeration compressor in cold storage It is strictly forbidden to reverse after the refrigeration compressor of the cold store stops. When the compressor rotor is stationary, a large volume of process gas rema器2䀀
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07/16/2022

Common Faults of Gear Pump

Cause: A. the rotation direction is opposite; B. the suction or discharge valve is closed

09/20/2023

Geothermal vs Air Source Heat Pump: Which One is Right for You?

As the world becomes more conscious about the environment, finding ways to reduce carbon emissions has become a top priority. One of the ways to achieve this is by using renewable energy sources to heat our homes.

07/07/2020

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

09/06/2020

Application of synthetic compressor oil

At present, synthetic lubricants are widely used in the compressor field. Among them, oil-injected and oil-immersed rotary screw air compressors and large reciprocating compressors are one of the most used markets. For example, the sales volume of synthetic compressor oil in Western Europe was 6000t in the late 1980s, and it rose to 10000 in the early 1990s. The sales volume in the United States has exceeded 15,000 tons, and it is increasing at a rate of more than 10% per year.

09/21/2020

Refrigeration system failure symptoms

Symptoms of refrigeration system failure 　 　 　 　 1. Detection of pressure and temperature of refrigeration system　　 (1) The pressure concept of the refrigeration system The refrigeration system can be divided into high and low pressure during operation. The high pressure section is from the discharge port of the compressor to before the throttle valve. This section is called the evaporation pressure.

02/11/2025

What is a Hermetic Compressor? Understanding the Basics

hen it comes to refrigeration systems, a crucial component is the compressor. This is the part that compresses the refrigerant and moves it through the system, allowing for heat transfer and ultimately creating the cooling effect.

06/14/2020

The future development space of maglev central air conditioner

The emergence of magnetic suspension refrigeration compressors not only provides a new technology application method for the q * HVAC industry, but also as a product application of the central air conditioning technology z * forefront and energy saving efﰸ2䀀
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