How to judge the performance of the refrigerator compressor

The compressor is the heart of the commercial freezer refrigeration system, and its quality directly affects the performance of the commercial freezer. Therefore, in the process of testing the quality of the freezer, we should focus on testing the new and old and the running state of the compressor. But ordinary consumers do not know how to carry out strict testing. The customers I contacted are very worried about buying a refrigerator with poor quality. Today, I will give you a big reveal and teach you how to identify the heart "compressor" of the refrigerator. quality?

What are the normal sounds?

clang clang

When the running compressor stops, it will produce this kind of clanging sound, sometimes it rings once, sometimes it rings twice, and the sound is louder. This sound comes from the inside of the compressor. The reason is that there are three springs in the compressor to hang the cylinder and the stator to prevent shocks. When the compressor stops working, a resistance will be generated. Due to the action of the springs, the cylinder will move to both sides. Swing, producing a metal slamming sound, which is a normal sound.

popping

After the compressor has been running for a few minutes or stopped for a few minutes, a popping sound can be heard. This sound depends on which part of the commercial freezer. If it is behind the freezer, it is usually the condenser copper pipe or louvers. The heat sink, the sound caused by thermal expansion and contraction, if the sound comes from the upper part of the freezer, it is usually the evaporator hoisted in the upper part of the freezer. Due to the change in temperature, the thin ice that has been frozen together in the hoisting part The snapping sound of being pulled. Both of the above sounds are normal.

rumble

During the use of commercial refrigerators, whenever the compressor starts and stops, a rumbling sound is often heard in the pipe, which is the sound of liquid refrigerant flowing. In a pressurized liquid pipeline, when the liquid flows, there is a rolling sound of water flow. This is a normal phenomenon.

Unusual sound?

crash

When the compressor is running, there is a metal impact sound inside the machine. This sound is caused by the breakage of the high-pressure silencer in the compressor. It often occurs in the use of refrigerators.

This kind of sound requires cutting the case, replacing the high pressure muffler tube or welding a fracture.

boom

When the compressor is running, there is a roaring sound in the machine. This kind of sound is caused by a broken or dislocated spring of the hanging steam in the machine, causing the cylinder to collide with the casing. This is an abnormal sound. sound.

This kind of sound needs to cut the casing, check the cause of the dislocation of the suspension spring, or the cause of the breakage, and exclude them respectively.

clang clang

When the running compressor stops, it will produce this kind of clanging sound, sometimes it rings once, sometimes it rings twice, and the sound is louder. This sound comes from the inside of the compressor. The reason is that there are three springs in the compressor to hang the cylinder and the stator to prevent shocks. When the compressor stops working, a resistance will be generated. Due to the action of the springs, the cylinder will move to both sides. Swing, producing a metal slamming sound, which is a normal sound.