In the refrigerated truck refrigerator, the compressor is a high-speed rotating working part, and the probability of failure is relatively high. Below, I will explain 3 common faults and solutions of refrigerated truck compressors:
1. Abnormal sound
(1). There are many reasons for the abnormal noise of the compressor due to the improper tightness of the transmission belt. For example, the compressor electromagnetic clutch is damaged. In the light, it will cause the compressor to not work, and in the heavy, it will cause damage to the compressor. When the transmission belt is working, if the compressor pulley and the generator pulley are not in the same plane, the service life of the transmission belt or the compressor will be reduced. The repeated pull-in of the electromagnetic clutch will also cause abnormal noise in the compressor. For example, the power generation of the generator is insufficient, the pressure of the air conditioning system is too high, or the engine load is too large, which will cause the electromagnetic clutch to repeatedly engage.
(2). In addition to the problem of the electromagnetic clutch itself, the tightness of the compressor transmission belt also directly affects the life of the electromagnetic clutch. If the transmission belt is too loose, the electromagnetic clutch will easily slip; if the transmission belt is too tight, the load on the electromagnetic clutch will increase. The electromagnetic clutch of the compressor of refrigerated truck is a common part of abnormal noise. The compressor often runs from low speed to high speed under high load, so the electromagnetic clutch is very demanding, and the installation position of the electromagnetic clutch is generally close to the ground, and it is often exposed to rain and soil. When the bearing in the electromagnetic clutch is damaged There will be abnormal noise.
(3). Reliable lubrication is required when the car air-conditioning compressor works. When the compressor lacks lubricating oil, or the lubricating oil is used improperly, serious abnormal noise will be produced inside the compressor, and even wear and tear of the compressor will be caused.
(4). There should be a certain gap between the electromagnetic clutch and the compressor mounting surface. If the gap is too large, the impact will increase. If the gap is too small, the electromagnetic clutch will interfere with the compressor mounting surface when it works. , Which is also a common cause of abnormal noise.
2. Leakage
The refrigerant leakage of refrigerated trucks is the most common problem of refrigerated truck refrigeration systems. The leakage of the compressor is usually at the junction of the compressor of the refrigerated truck and the high and low pressure pipes, where it is usually troublesome to check because of the installation position. The internal pressure of the air-conditioning system is very high. When the refrigerant leaks, the compressor lubricating oil will be lost, which will cause the air-conditioning system to not work or poor lubrication of the compressor. There are pressure relief protection valves on the compressors of refrigerated trucks. The pressure relief protection valves are usually for one-time use. After the system pressure is too high for pressure relief, the pressure relief protection valves should be replaced in time.
3. Not working
There are many reasons why the compressor of a refrigerated truck does not work, usually because of related circuit problems. It is possible to preliminarily check whether the compressor is damaged by directly supplying power to the electromagnetic clutch of the compressor.
Counclima transport refrigeration unit V300F installed on Hyundai H-100 light truck in Latin American
