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09/10/2020
The specific application of air compressors in various industries
1. Power industry Main uses: compressed air systems for instruments, compressed air systems for ash removal, and miscellaneous compressed air systems for factories. Water treatment includes boiler feed water treatment and industrial wastewater treatment systems. There will also be compressed air systems for equipment power in hydropower stations.
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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.
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07/27/2020
What is the refrigeration pressure of the inverter air conditioner? What is the refrigerant of inverter air conditioner?
It is necessary to find a good air conditioner to be able to reassure people. Inverter air conditioners are really good and are loved by people. So when people use such air conditioners, they should also know the refrigeration pressure of inverter air conditioners. At the same time, we should know what the refrigerant of inverter air conditioner is, so that it can be more helpful to the use of air conditioner.
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09/28/2022
What is a Sliding Vane Pump?
<strong>Sliding vane pump</strong> is also called vane pump, <strong>rotary vane pump</strong>, mainly composed of a rotor
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08/15/2020
Three points to make industrial chillers more energy-efficient
In the lives of modern people, everyone advocates energy saving, power saving, environmental protection, saving existing energy consumption, and advocating the development of
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08/15/2020
Selection knowledge of screw chiller
Screw chiller is a large-scale industrial refrigeration equipment. It is widely used in central air-conditioning and large-scale refrigeration industry. It plays an important role in refrigeration, cooling and cooling.
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01/14/2022
Rotational Inertia of Servo Motor
Servo motor refers to the motor that controls the operation of mechanical components in a servo system. Its rotor speed controlled by the input signal can respond quickly.
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09/23/2020
Delta PLC's application in screw air compressor
1. Design intent For cost reasons, the control systems used in the air compressor manufacturing industry for a long time have been controlled by single-chip microcomputers, and digital tubes indicate working status and indicate parameter values
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08/21/2020
Trouble phenomenon the air conditioner is not cooling, the outdoor unit starts and stops frequently
When the air conditioner is frequently used in summer, many friends will encounter this problem, that is, the outdoor unit of the air conditioner frequently starts and stops, but the indoor unit is not cooled.
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06/22/2020
How often does the freezer cool
It is normal for the freezer to cool once every 10-20 minutes. The cooling time of the freezer is not fixed, it is related to the set temperature, usage, storage items and service life. If it's a new refrigerator you just bought, you set it to 4th gear cooling, you may have to wait a few hours before cooling, this is because the new refrigerator is synchronized with the room temperature, cooling requires a process. <img src="{{media url="magefan_blog/How_often_does_the_freezer_cool.jpg"}}" alt="" />