Mitsubishi Servo Drive MR-J4-350B

08/19/2020

What are the characteristics of lithium bromide absorption refrigeration units in air conditioning projects

In air-conditioning engineering, most commonly used refrigeration units are vapor compression refrigeration methods, and the refrigerant used in compression refrigeration is halogenated hydrocarbons (ie Freon).

07/17/2020

TH series constant temperature and humidity air conditioning unit

TH series constant temperature and humidity air conditioning unit The product features are: Copeland TH series constant temperature and humidity air conditioning unit is a new type of air handling unit independently developed by our company. Reliable performance, easy to use and operate, can be widely used in empty laboratories, electronic instrument assembly workshops,

06/14/2020

How to configure the cold storage refrigeration equipment

How to configure the cold storage refrigeration equipment How to configure the cold storage refrigeration equipment? As a total solution provider for cold storage, Sike Refrigeration has rich experience in the installation of cold storage refrigeration e器2䀀
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07/23/2020

Reasons for excessively high discharge temperature of refrigeration compressor (technology sharing)

The refrigeration compressor is the core and heart of the refrigeration system. The capacity and characteristics of the compressor lead to the capacity and characteristics of the refrigeration system. In a sense, the design and matching of the refrigeration system is to reflect the capacity of the compressor.

08/19/2020

Why can a chiller with superior environmental performance reduce the cost of use

Many companies need a low temperature environment when completing production tasks. Because companies use air-cooled chillers to reduce the environmental temperature, the cost is relatively low, and they are very suitable for long-term use by companies.

07/16/2020

Main features of semi-closed scroll compressor

1. On-site maintenance: The shell of the half-sealed scroll compressor can be disassembled, and the horizontal cast iron body is fixed by bolts. 2. Patented flexible scroll technology: compact structure, extremely low vibration-quiet operation and higher tolerance to liquids and magazines.

06/29/2020

Several causes of compressor burning

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.

08/13/2025

Refrigerator Compressor Not Running and What to Do?

When it comes to refrigeration, the compressor is one of the most crucial components. It plays a vital role in keeping your refrigerator running, as it's responsible for pumping refrigerant throughout the system.

09/05/2020

Where does the air compressor rental market go

At the beginning of 2017, Dr. Li in the construction industry said that the international sales of construction machinery hours to leasers have reached more than 25% of the total machinery output value,