Danfoss Compressor VZH028CHBNB

08/18/2020

Collection! This is perhaps the most complete summary of the advantages and disadvantages of chillers

1. Piston chiller<br></br> 　　 [China Refrigeration Network] Advantages:<br></br> 　　 1. The materials are simple, common metal materials can be used, processing is easy, and the cost is low;<br></br>

09/22/2022

Hydraulic Pumps: Common Faults and Troubleshooting Methods

A hydraulic pump is an energy conversion device whose function is to convert the mechanical energy of the prime mover into the pressure energy of the hydraulic oil

06/28/2020

Hitachi compressor, the world's first

When choosing a home central air conditioner, many attentive consumers will compare the compressor technology of various brands. Because the compressor is the heart of the central air conditioner, the advanced nature of the compressor technology is directly related to the effectiveness and stability of the entire air conditioning system. It’s no surprise that consumers are more concerned about compressor technology. The editor here briefly introduces the advantages of Hitachi compressors.

09/06/2020

The difference between variable frequency air compressor and industrial frequency air compressor

The difference between variable frequency air compressor and industrial frequency air compressor: 　　 1. The pressure is stable:

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.

06/14/2020

Danfoss cocuses on providing energy efficient, sustainable and smart refrigeration compressors for a varied range of commercial applications such as cold rooms

06/28/2020

Compressor-Hitachi Inverter Compressor

From the current development trend of refrigeration compressors, in order to make it compact, efficient, energy-saving and low vibration and low noise, it has become the goal that air-conditioning compressors continue to pursue in manufacturing technology. Its role is mainly manifested in the following points: compressor

08/20/2020

Reasons for water leakage of air conditioner in computer room and common treatment methods

Leakage of the air conditioner in the computer room not only causes the indoor humidity to affect the cooling effect of the air conditioner, but also affects the service life of the air conditioner,

06/24/2024

Top 11 Hydraulic Solenoid Valve Manufacturers Worldwide

The hydraulic solenoid valve is a widely used valve product and there are many brands/manufacturers of hydraulic solenoid valves on the market.

06/05/2025

How to choose screw air compressor with or without oil

In screw air compressors, they are classified according to the type of lubrication, which are mainly divided into two types: oil lubrication and no oil. Literally, it is easy to understand whether or not air compressor lubricants are needed.