Danfoss Compressor SM112A3XO

07/15/2020

Installation, selection and adjustment of air conditioner flow switch

Water flow switches are also called flow switches. Water flow switches are widely used in water systems of chillers and air conditioning projects. It can ensure the safe and efficient operation of air conditioning systems.

06/29/2020

Several causes of compressor burning

08/05/2020

Basic knowledge of air source heat pump at a glance

1. What is a heat pump?<br></br> 　　 Heat pump is not a water pump, or even a pump, but a complete set of equipment. The English name of heat pump, heatpump, has 2 definitions:

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 automation technology to control energy saving in cold storage

Warehouse temperature and evaporation temperature adjustment 　　(1) Warehouse temperature adjustment of multi-point temperature parameters 　　In the past, the temperature adjustment of the warehouse was controlled by instrument, which was mainly based on position adjustment.

05/18/2022

How to Measure Air Pressure in A Cylinder?

During use, the cylinder piston bank will deteriorate due to wearing, ablation, gumming, carbon deposition and other reasons.

08/18/2020

How to maintain the cooling tower

1. Replacement of fillers. Inferior fillers have weak rigidity, poor load-bearing capacity, and are easy to deform and fall loose, which will directly lead to poor cooling effect or loss of cooling capacity.

09/21/2020

Cold dryer knowledge

Refrigeration unit refrigeration capacity conversion table

08/14/2020

The reason why the fan of air-cooled chiller does not run

In many areas where water sources are lacking, or air-cooled chillers for cooling and cooling of supporting machinery and equipment, after several years of use, such and other small failures may occur.

09/17/2022

Classifications of Air Cylinders

The air cylinder, also known as the pneumatic cylinder, is a cylindrical metal part that makes the piston to perform a reciprocating motion.