Bosch Filter 0986AF5725

08/02/2020

From the perspective of horsepower and energy efficiency ratio, central air conditioners should be selected like this!

The choice of central air conditioner for decoration has become a market trend. How to choose a suitable central air conditioner, choose a duct machine or a multi-line group

04/11/2025

Overview of Screw Refrigeration Compressor Technology

Screw compressors, also known as screw compressors, are divided into single screw compressors and twin screw compressors. The single screw compressor was developed by Sinn, France in the 1970s.

09/08/2020

Energy-saving way of air compressor inverter

The energy-saving measures for frequency converters mainly reflect the use of current fans, pumps, and hoists. In order to ensure the reliability of production, all kinds of production machinery have a certain margin when they are equipped with power drives.

08/13/2020

Reasons for the reduction of refrigeration equipment system cooling capacity

Refrigeration equipment is a relatively large energy-consuming equipment, especially for summer cooling. Its electricity consumption costs are becoming more and more significant,

06/29/2020

Compression ratio of American Copeland compressor

02/10/2023

How to Replace a Blend Door Actuator?

Blend door actuators control the temperature and flow of air in the vehicle. If your vehicle only releases cold air, or you can't change the airflow

10/21/2025

List of Problems and Solutions for Screw Compressors

Screw compressor is another type of commonly used compressor. We’ve listed the following 11 problems and solutions for reference of anyone or business in need.

07/17/2020

How to clean the central air conditioning system

Many companies need the central air conditioner of the all-in-one machine to cool the equipment. If the equipment takes a long time or if one of the accessories in the system is broken, we need to replace it. If the equipment is used for a long time, many impurities will remain in the system.

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.

02/08/2023

Pros and Cons of Pneumatic, Electric and Hydraulic Actuators

The actuator used in the control valve are nothing more than pneumatic, electric, and hydraulic (electro-hydraulic) type.