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Recent related posts
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08/05/2020
How to solve the problem of too high compression ratio of chiller
In the process of using industrial chillers, various problems will inevitably occur. Due to the structure of the industrial chiller, once the compression ratio of the compressor is too high, it will affect the working efficiency of the industrial chiller.
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12/26/2021
Why Refrigeration Compressor Oil Deteriorates & How to Add Oil
The lubricating oil used in a refrigeration compressor can lubricate the friction surface, reduce the friction work, friction heat and avoid wear of the compressor motor.
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09/07/2020
How to choose the first flange sealing surface form of the pressure vessel using flange connection
The flange welded by the connecting pipe on the pressure vessel cylinder to the flange is the first flange connected to the pressure vessel flange, and the flange that is matched with it is not counted as the first flange, and other flanges.
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06/19/2020
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.
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09/18/2020
Jingliang Electronics-Air Compressor Sensor Solution
——High-quality, cost-effective to provide customers with perfect sensor solutions Precision Electronics-MEAS (MSI) Sensor Co., Ltd. is a precision electronic engineering expert who masters the world's leading silicon micromachining MEMS technology.
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07/12/2020
Danfoss compressor selection
Danfoss Compressor is an important product of the Danfoss Industrial Group. It has three factories in Germany, Slovenia and Mexico. It produces small refrigerator compressors for household refrigerators, commercial freezers and air conditioners. The power range is from /OHP-HP, using R12 and R22. , R502, R134a, R404A, R600a and other refrigerants.
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09/05/2020
What is the composition of the often said air compressor station
For air compressors, especially screw air compressors, they cannot be used directly. It is also necessary to establish an air compressor station with corresponding post-processing equipment.
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09/10/2020
Types and characteristics of air compressors and their application choices
Air compressor (English: aircompressor) 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.
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09/06/2022
What is the Difference between Synchronous and Induction Motor
Electric motors are roughly divided into three types, synchronous motor, asynchronous motor
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08/04/2020
Why is the compressor short of oil, and why does the evaporator have an oil film
The compressor is a complex machine that runs at high speed. Ensuring adequate lubrication of the compressor crankshaft, bearings, connecting rods, pistons and other moving parts is the basic requirement for maintaining the normal operation of the machine