Ebmpapst Fan 405/2 9291708039

09/07/2020

Screw air compressor and precision filter<br></br>

For screw air compressors, it is not like piston air compressors, which can be used directly after purchase. It also needs to be equipped with corresponding post-processing purification equipment, gas storage tanks, filters and dryers are all necessary.

08/18/2020

Installation method of ventilation and air conditioning system

1.Installation of ventilation ducts<br></br> 1) The duct can be manufactured on site or prefabricated in the factory. The duct manufacturing methods are divided into bite connection, rivet connection, and welding.

09/10/2020

Design principle of vacuum oil filter

The vacuum oil purifier is designed according to the different principles of the boiling point of water and oil. It consists of a vacuum heating tank fine filter, condenser, primary filter, water tank, vacuum pump, oil drain pump and electrical cabinet.

01/15/2021

Working principle of air conditioning sensor_The role of air conditioning sensor

Air conditioning sensors are also called temperature sensors. The main function in air conditioning is to detect the temperature of various parts of the air conditioner. There are more than one air conditioning sensors in the air conditioner, and they are器2䀀
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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.

08/14/2020

How to use common refrigeration tools

1. Pressure gauge operation method:<br></br> Generally, in the refrigeration industry nowadays, a compound double meter is used to measure the pressure of the refrigeration system, charge refrigerant, and vacuum, etc. It is widely used.

01/08/2021

How Air Conditioners Work

Air conditioners use refrigeration to chill indoor air, taking advantage of a remarkable physical law: When a liquid converts to a gas (in a process called phase conversion), it absorbs heat. Air conditioners exploit this feature of phase conversion by fo器2䀀
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07/15/2020

The Secret of Counterfeit Refrigeration Compressor

Mass consumer goods, especially branded products, once counterfeit, copycats, etc., there will be a large number of media and professional counterfeit ears to remind consumers. However, due to the distance between refrigeration products and ordinary consumers, they are rarely bombarded or continuously concerned, and are more often circulated within the industry, which makes it more difficult for the industry to fight counterfeiting.

02/21/2025

Industrial Heat Pump Dryer: Everything You Need to Know

Industrial heat pump dryers have revolutionized the drying and dehydration process of various products in different industries.

07/07/2020

Earth Hour: Hitachi Central Air Conditioner works with you to speak for the earth