FULRD Relay FDR3-A4880Z
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01/05/2021
Refrigeration Compressor
Refrigeration Compressor Dynamic Simulation and Optimization of LNG Plants and Import Terminals In Handbook of Liquefied Natural Gas, 2014 8.4.4.2 Verification of driver capability and startup conditions The refrigeration compressors and the drivers 器2 䀀 ᅵ皥 䖒皦즠Ʋ嫜ི 㲈Ʋ 䌁皦 ᮔDž༬皧嫦ིЀ 呄ᠾ鹨់༹皧 ࠄ 00령ꐱ댁珵뛐珵Љ 䕄ྦ 뤂ᐱ뚜珵 ᴴᏩ呄ᠾ퍘ᒥ 鹨់ᩄ ꋔྦ 瑉浥 巠皱㙲皦抐皱 巠皱 ੨皦柘皱 ᅵ皥 ب 巠皱㙲皦忈皱 ੨皦柘皱 즠Ʋǜ 勁皦즠Ʋب ǜ V / 펔B䌁皦 ᮔDž '鱤džၜ먢䇨珵呈ᠾ뤂ᐱ ⿇⬿먲僧ᐱ㥲ᐲ�僬㣢ᐲ ᠾ 랖僧ۘ 識 �僬㣢ᐲ 臆S㥲ᐲ ᬄğ 識 理艏S杴 識杴 㥲ᐲ
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06/13/2020
Disposal method of ammonia leakage accident of ammonia refrigeration compressor
On 2020.2.8, a batch of much-needed protective materials donated by Danfoss and Abena, a world-renowned health care product manufacturer, will be sent from Denmark to China to support China's fight against new coronary pneumonia. The total price of this b 器2 䀀 ᅵ皥 䖒皦즠Ʋ嫜ི 㲈Ʋ 䌁皦 ᮔDž༬皧嫦ིЀ 呄ᠾ鹨់༹皧 ࠄ 00령ꐱ댁珵뛐珵Љ 䕄ྦ 뤂ᐱ뚜珵 ᴴᏩ呄ᠾ퍘ᒥ 鹨់ᩄ ꋔྦ 瑉浥 巠皱㙲皦抐皱 巠皱 ੨皦柘皱 ᅵ皥 ب 巠皱㙲皦忈皱 ੨皦柘皱 즠Ʋǜ 勁皦즠Ʋب ǜ V / 펔B䌁皦 ᮔDž '鱤džၜ먢䇨珵呈ᠾ뤂ᐱ ⿇⬿먲僧ᐱ㥲ᐲ�僬㣢ᐲ ᠾ 랖僧֜ 識 �僬㣢ᐲ 臆S㥲ᐲ ᬄğ 識 理艏S杴 識杴 㥲ᐲ
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06/13/2020
The omni-directional strategy-fault and maintenance of piston refrigeration compressor
The omni-directional strategy-fault and maintenance of piston refrigeration compressor 1. The refrigeration compressor cannot start normally Maintenance ideas
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02/14/2023
Common Problems and Causes of Gearboxes
The following will introduce some problems that may occur in the use of gearboxes and the reasons for such problems.
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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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08/11/2020
Solution to water blowing in air conditioner
The air conditioner indoor unit blows water, the fault is not big, but there are many reasons, and it is troublesome to solve it. Please refer to the description of the following various situations:
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09/07/2020
What is a sliding vane compressor
1, the sliding vane compressor is a positive displacement rotary compressor. It consists of a rotor (with radial slots inside the rotor and sliding vanes installed in the slots) and a stator (or). The rotor rotates in the stator.
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08/09/2020
How to judge the new and old refrigeration compressors
After we buy the chiller, how to judge the old and new problems of the compressor? This requires the accumulation of professional knowledge. Therefore, in view of this, users should master some knowledge about industrial chillers.
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06/13/2020
Frequently asked questions about refrigeration compressors, do you know these
Frequently asked questions about refrigeration compressors, do you know these 1.Why control the impurity content and moisture content of the compressor and air conditioning system?
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09/06/2020
Design steps of two-wire AC current transmitter
Known high-current current transformers convert different currents into 0~5A alternating current for on-site display. For long-distance transmission, the current must be converted into a standard DC current signal of 4-20mA before transmission.