Danfoss Compressor SH295A4ALK

08/11/2020

The load calculation formula of computer room air conditioner

The load calculation formula of computer room air conditioner<br></br> How to obtain heat and cooling load in the computer room and how to calculate the cooling capacity required in the constant temperature and humidity room.

06/29/2020

Several causes of compressor burning

08/21/2020

Current development status of cold storage evaporator and prospects for the future

Chinese agricultural output has always been the number one in the world. The output of grain, vegetables, meat, eggs, aquatic products or fruits has shown an increasing trend, providing extremely abundant raw materials for the food industry.

09/15/2020

The working principle of air compressor

The air compressor is the main body of the air source device. It is a device that converts the mechanical energy of the prime mover (usually an electric motor) into gas pressure energy, and is a pressure generating device for compressed air.

09/04/2020

Screw air compressors have become an inevitable trend to replace traditional air compressors

In the recommended catalog of energy-saving technology and equipment just announced by the country, screw air compressors account for the majority, indicating that the country is strongly recommending high-performance products with technology and energy-saving

09/07/2022

How to Select Overflow Valve

The nominal pressure of the overflow valve is determined by the operating pressure, the service temperature range of the safety valve is determined by the operating temperature

08/18/2020

Common problems and solutions of piston refrigeration compressors

Piston compressors are inconvenient to maintain, but piston compressors have an irreplaceable role in many fields. Therefore, it is very important for many companies to ensure its smooth operation.

08/02/2020

Why the cold storage project can quickly return to temperature after power failure

Recently, many people have asked why the cold storage project has a rapid constant temperature after a power failure. This problem is believed to occur when many users use the cold storage.

07/06/2020

Global Commercial Refrigeration Compressors Market Trends, Opportunities, Drivers, Challenges and Porter’s Five Forces Analysis

 JUL 6, 2020  Corona Effect, Covid-19 Commercial Refrigeration Compressors Market, Global Commercial Refrigeration Compressors Industry, Global Commercial Refrigeration Compressors Industry Forecast 2026, Global Commercial Refrigeration Compressors Market, Global Commercial Refrigeration Compressors Market 2020, Latest Commercial Refrigeration Compressors Market Research Report

06/20/2020

What are the causes of air conditioning trip

What are the causes of air conditioning trip 1. The contradiction between the rated current of the air conditioner and the current carrying capacity of the wire. 　　Here are two formulas involved: 　　①The rated current of air conditioner I=P÷U ÷power factor, the power remains unchanged, the smaller the voltage, the greater the current required. 　　② The current carrying capacity of the wire I=U÷R, the voltage is proportional to the current. 　　 So when the power supply voltage is normal, we must consider the line voltage drop. The longer the line, the greater the resistance, the greater the voltage drop, and the smaller the output current at the end. However, because the power of the load remains unchanged, the voltage becomes smaller, and the current that needs to be output will be larger. At this time, the wire is forced to overload, and the time will cause heating, and eventually cause the tripping of the open circuit. 　　 Some friends said that the heat of the wire will not cause the tripping of the circuit breaker. In fact, the manufacturer of the air switch has made it clear in the relevant manuals that the heat of the wire will cause the air switch to trip. Because the wire heats up, the crimp terminal will also heat up, and the resistance will become larger and larger. The larger the resistance, the greater the current consumption, and the hotter it will be, a vicious cycle. 　　 2. Leakage 　　During the daily maintenance work, we will encounter the situation that the air circuit trips due to the leakage of electricity. At least I have not experienced it once or twice. Regardless of the leakage of the neutral line or the leakage of the live line, a long time will cause the circuit breaker to trip. 　　Why does the electric leakage cause the MCB to trip? There are two situations. 　　 ① Good grounding. At the beginning, the leakage current was not large, and as time went by, the leakage current became larger and larger, and eventually evolved into a short circuit to ground, unable to close. 　　②There is no ground wire. If the equipment is not connected to the protective ground, when the wire leaks to the equipment, it is equivalent to adding a large shunt resistance. Like this problem, if the air conditioner does not have a ground wire, when the wire leaks to the air conditioner, the air conditioner is a very large shunt resistor and will consume a lot of current. Eventually, the wire will heat up or trip open. 　　How to determine whether the trip caused by the above two aspects can be done with a clamp ammeter. 　　 ① Measure the voltage at the input and output to see if there is a significant change in voltage drop. 　　②Measure whether the output current exceeds the standard. 　　 So my suggestion is: first measure the supply voltage to see if it is within the allowable fluctuation range. Then measure the current to see if it exceeds the rated ampacity of the wire. Finally, check the data one by one according to the measured data to find out the reason.