HONGFA Relay HFA4A-21-2H2DSTF

07/14/2025

Refrigeration Compressor Frosting Reasons & Solutions

When we use the refrigeration compressor, there could be frosting. It’s a failure that we can solve.

06/29/2020

What is the cause of compressor pipeline vibration

08/17/2021

What to do if Your Compressor is in Reverse Rotation

As we know, the operation of the internal compression structure of the refrigeration compressor has a fixed direction.

07/24/2020

Air conditioning system fault diagnosis guide (part 2)

This article continues from the previous article: A Guide to Fault Diagnosis of Air Conditioning System (Part 1) During the intense heat, air-conditioning maintains the "life" of some people. People are afraid of heat that they can't live without air-conditioning.

07/29/2020

Briefly talk about scroll, screw, piston, centrifugal refrigeration compressor Piston refrigeration compressor

Piston refrigeration compressor<br></br> Piston type (ie, reciprocating) refrigeration compressors are widely used, but the displacement is not large. Generally, they are small and medium-sized compressors. The cooling capacity of general air-conditioning conditions is less than 300kW.

06/14/2020

The brain hole is wide open! Japanese companies have introduced summer cooling masks,

The brain hole is wide open! Japanese companies have introduced summer cooling masks, which can be added to the refrigerator and frozen in the refrigerator after repeated use of the brain hole! Japanese companies introduced summer cooling masks, which can器2䀀
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08/19/2020

How to dehumidify the refrigeration system of industrial refrigerators

The water content in the industrial refrigerator system comes from two aspects. One is that the vacuum is not in place, so that air and water vapor remain in the system. The other is that the

06/14/2020

Causes and harms of non-condensable gas produced by refrigeration system

Non-condensable gas refers to air, hydrogen, nitrogen, lubricating oil vapor, etc. mixed in the refrigeration system.

03/02/2021

Connection between Arduino and servo motor

The connection of the servo motor using Arduino is as follows: Connect the black wires on the two servo motors to the GND on the Arduino Connect the red wires on the two servo motors to the 5V pin on the Arduino Connect the yellow wire on the first motor to pin 8 on the Arduino

08/14/2020

Commissioning of the water system (heat source) of the air conditioning system-equipment commissioning

Water test operation of surface cooler and spray device in air conditioning unit. Check whether the pressure difference between the inlet pipe pressure and the outlet pipe pressure of the meter cooler is within the normal range and whether there is water leakage; whether the water trap of the meter cooler is installed correctly and whether the discharge is smooth.