As a key temperature control device in industrial production, the cooling machine is widely used in various fields such as chemical engineering, manufacturing, and electronics. Its stable operation directly affects the smoothness of the production process and product quality. During long-term high-intensity operation, the cooling machine is prone to various malfunctions due to factors such as working conditions, operating methods, and maintenance. If not promptly investigated and handled, it may lead to equipment shutdown and production interruption.

1、 Cooling effect decreases

The decrease in cooling effect is one of the common faults of cooling machines, mainly manifested as the inability of the equipment to reach the preset cooling temperature after operation, or a significant slowdown in cooling rate. The main causes include three aspects: firstly, refrigerant leakage, inadequate sealing of pipeline interfaces, valve damage, etc., which can lead to refrigerant loss and disrupt the balance of the refrigeration cycle; Secondly, there may be a malfunction in the cooling system, such as excessive dust and scaling on the surface of the condenser, or a faulty cooling fan, which can lead to poor heat dissipation and affect refrigeration efficiency; The third issue is filter blockage. Impurities carried by the cooling medium during circulation can easily clog the filter, resulting in insufficient medium circulation flow and reduced heat transfer efficiency.

2、 Abnormal operating noise

The noise of a cooling machine running normally is stable. If there is any piercing noise, vibration noise, or intermittent noise, it is a fault signal. The causes of faults are often related to core components: wear of internal parts of the compressor, loose bearings, or insufficient lubricating oil can produce metal friction noise; Fan blades that are deformed, loose, or stuck by foreign objects can cause vibration and noise; The pipeline is not firmly fixed, and abnormal noise may occur due to resonance caused by the flow of the medium during operation. In addition, uneven installation of equipment and loose foundations may also lead to increased noise during operation.

3、 Frequent start stop of equipment

Frequent start stop of the cooling machine not only affects temperature control stability, but also accelerates component aging. Common causes include: improper temperature controller parameter settings, excessively close start and stop thresholds, resulting in frequent triggering of start and stop commands by the equipment; Abnormal system pressure, frequent action of high or low pressure protection devices, forcing equipment to shut down and restart; Insufficient cooling medium and low liquid level cause the circulating pump to idle, triggering the protection mechanism to shut down; In addition, high ambient temperatures or poor heat dissipation can also cause the equipment to frequently start and stop due to overload protection.

4、 Pipeline and interface leakage

Leakage faults are mainly manifested as refrigerant or cooling medium leakage, which not only affects the refrigeration effect, but also may pollute the environment and cause safety hazards. The main causes are: pipeline aging, corrosion, and long-term exposure to alternating high and low temperatures or corrosive working conditions, which can easily lead to pipeline damage; Wear and aging of interface seals lead to a decrease in sealing performance, resulting in medium leakage from the interface; During installation or maintenance, inadequate fastening of pipeline connections or installation deviation of seals can also cause leakage problems.

In summary, in the daily use of industrial cooling machines, standardizing operating procedures, conducting regular maintenance, timely cleaning of component impurities, checking the sealing status and refrigerant level can effectively reduce the probability of failure, ensure stable operation of the cooling machine, and provide reliable temperature control support for industrial production.