What are the central air conditioning performance that users care about

What are the central air conditioning performance that users care about

For any brand of central air-conditioning equipment, as a user, there are actually three points:

　　 Stable, energy-saving, comfortable (of course the face project must consider brand factors)

　　 So many brands have products, why should I buy yours? In addition to the low price, you have to look at these three! .

　　 Stability:

1. DC brushless frequency conversion multi-line. We put up a word that "DC brushless" is so high from the beginning. The popular explanation is this: To talk about "brushless", you must first talk about "brushed", each motor In fact, it is necessary to switch the positive and negative poles of the power supply to maintain the rotation of the motor. If you are interested, you can disassemble the small motor of the toy car to see that the motor has a brush. The power cord is connected to two copper brushes...

The copper brush piece contacts the inlet and outlet ends of the wire winding on the rotor; as the rotor rotates, the inlet and outlet are continuously switched. The winding group on the rotor will flow along for a while, and the current will flow backwards for a while, and it is maintained like this The motor rotates endlessly...!

Maybe you still don’t understand. Anyway, you have to understand that the motor needs to constantly switch the direction of current to rotate 360 ​​degrees. Either the current in one direction can only rotate 180 degrees, or it can only rotate 120 degrees... two brushes. The purpose of the film is to use the rotation of the motor to change the direction of the current, so as to maintain the rotation of the motor. The brush is a mechanical process, naturally there are friction problems, easy to generate heat and short life. With the development of chip and computer technology, there is no need Copper brush, through the computer to control the positive and negative direction of the direct current, control the rotation speed of the motor according to the switching frequency you need. The faster the switching frequency, the faster the motor will rotate. Conversely, the slower the frequency, the slower the motor will rotate. .. And the accuracy is higher... So the DC brushless must be more stable than the DC brushed... (Experts? Can you understand this?)

2. Oil return technology: Oil return technology is a very important part of the stability of the air conditioner. During the high-speed rotation of the compressor, the lubricating oil and refrigerant are mixed together, but we do not need any oil during the refrigeration cycle. If the oil is not returned well, the compressor lacks lubricating oil, the failure rate will be high, and the life will be shortened. Too much oil in the evaporator and condenser will deteriorate the thermal conductivity, which will reduce the heat exchange efficiency of the air conditioner...

　　 3. Does the compressor use new and effective materials? Has the structure been improved? Does the improvement principle conform to the physical logic? How's the effect? These are important reference indicators to test whether the equipment is stable and advanced...!

　　 Energy saving:

　　For air conditioners, we used to talk about COP value and EER value. Now let’s have an IPLV value...

　　 I heard that the energy efficiency ratio of multi-line is measured by the IPLV index, but some people say that there are too many articles to do, so I can’t believe it completely. Why? This requires everyone to study by themselves...

All right! Each manufacturer’s product has its own proud IPLV value. Since this is doubtful data, in addition to this, we can also look at the cooling and heating efficiency of this equipment from these perspectives. 1. The compressor’s Structure and compression method, compression efficiency (currently more depends on whether the technology is advanced, whether the brand is strong); 2. The heat dissipation effect of the evaporator and condenser (do everything possible to improve the heat exchange efficiency of the refrigerant, and whether the heat dissipation area is better than that of similar products Big? Is the thermal conductivity of the material efficient? We can use the law of conservation of energy to analyze the above issues to test whether the manufacturer will make some ineffective improvements to increase the selling point of the product...?

　　Comfort:

For civil air conditioners, comfort is reflected in two points: 1. The speed of temperature change (suddenly hot and cold is definitely uncomfortable, and ensuring that the temperature of the air conditioner changes slowly and softly is critical to comfort. This is compared with fixed frequency. Air conditioning has obvious advantages); 2. Noise will directly affect our rest. This includes the noise of internal and external machines. We understand the size of the noise of a piece of equipment, and we need to investigate the source of the noise: For air conditioning: noise is nothing more than Four reasons: 1. The noise of the compressor; 2. The noise of the fan; 3. The noise of the airflow; 4. The noise of the refrigerant circulation. Then we have to look at how relevant brands do related treatments (such as shock absorption measures, sound insulation measures, improvement of the shape of the wind wheel, and air duct noise removal treatment)... If it conforms to the laws of physics, we can believe that their products are I really have made practical and effective efforts in this area...!