What sparks can be produced by the combined use of electronic expansion valve and compressor Electronic expansion valve and compressor are indispensable refrigeration accessories in refrigeration equipment and refrigeration equipment, and they are used together with high efficiency.
The electronic expansion valve and compressor frequency conversion speed regulation are used in conjunction with each other to achieve uninterrupted heat supply and rapid defrost. When defrosting, the four-way valve does not change direction. At this time, the electronic expansion valve is opened, and then the compressor runs at high speed to circulate the refrigerant at a high flow rate. The Hitachi ultra-low temperature heat pump compressor uses the exhaust heat of the compressor to defrost. This makes the defrosting time not only short, but also reduces the additional energy consumption of defrosting, and more importantly does not affect the heating efficiency. Therefore, mechatronics has become a new trend in the development of refrigeration systems. Refrigerating compressor replacement, you should pay attention to these in addition to the process
The annual maintenance and replacement of refrigeration compressors is not a small number. This alone accounts for about 30% of the total sales of Copeland refrigeration compressors sold for replacement each year. Many problems can only be revealed on the basis of quantity. However, within this 30% volume, a small number of customers will fail after a short period of time after replacing the refrigeration compressor, and then complain about quality problems, and start the after-sales quality inspection of Emerson Copeland compressors. program. However, the final result is not what users want to see, that is, the compressor itself does not have quality problems, but the faults in the system are not eliminated, and the new compressor is replaced, causing the compressor to fail again. Guangzhou Hitachi Refrigeration Compressor
Professionals engaged in refrigeration maintenance know that the process of replacing refrigeration compressors is simple. Turn off the power supply, release the refrigerant, remove the suction and exhaust pipes, change the compressor, connect the suction and exhaust pipes, maintain pressure and leak detection, vacuum, etc., and you will be OK after the completion of a set of procedures. But because of this, some masters may not detect the cause of the failure of the refrigeration compressor due to various reasons. The compressor has not dealt with the problem that may cause the failure of the refrigeration compressor in the system, and replaced the new compressor. This caused the new refrigeration compressor to fail again. Some time ago we met a customer like this. The customer is in Chicago, his own meat freezer, and the new compressor soon broke down again after the replacement. The complaint is that the compressor is a quality problem. In fact, the root cause of this user should be I know, Hitachi 5p inverter compressor, because when we started the after-sales inspection program for Emerson Copeland compressors for customers, the customers did not want to do quality inspection, but chose to repair it themselves. Therefore, such cases have repeatedly reminded our users that if the refrigeration compressor in the old system breaks down, and the new compressor needs to be replaced, the inverter compressor and Hitachi must remove all system failures before replacing. The difference between fixed frequency and inverter compressor refrigeration systems
Compressor refrigeration system, there are fixed frequency refrigeration system using fixed frequency compressor and variable frequency refrigeration system using variable frequency compressor. The variable frequency compressor in variable frequency refrigeration system adjusts the compression according to the difference between the current temperature of the equipment and the set target temperature The speed of the machine, so that the cooling capacity of the compressor increases or decreases. In a fixed frequency refrigeration system using a fixed frequency compressor, when the thermal expansion valve or capillary of the throttling element is used, the output of its cooling capacity is almost unchanged. The compressor needs to be started and stopped frequently.
