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In the pharmaceutical, food, chemical and other industries, process water cooling is required. Chillers have become a must for many industries. Understanding the operation of the equipment and performing the correct operation are prerequisites for the smooth operation of the equipment.
At the same time, industrial coolers are always worn out during use. Therefore, we need to record and analyze its operating parameters regularly, listen to the sounds produced during operation, check the type of snow, the use of frozen oil, etc., and do it regularly. Maintenance operations. The author cited the common problems and solutions in the operation of the chiller and hoped to help everyone.
What is the difference between the inlet and outlet water temperature of the chiller?
The technicians who specialize in industrial refrigeration, commercial central air-conditioning, and industrial dehumidification equipment analyzed the reasons for the temperature difference between the inlet and outlet of the chiller being too small.
The technicians stated that when the user uses a chiller, he encounters this situation: the company uses a chiller, the current inlet temperature is 24°C, the outlet temperature is 23°C, and the temperature difference is too small to meet the user's needs. For the reason that the temperature difference between water entering and exiting is too small, there are mainly the following situations:
1. The cold output of the chiller unit is small, for example, the unit itself is faulty, or it is not fully loaded, etc. These can be preliminary judged by observing the chiller operating current and other parameters.
2. It may also be that the heat transfer effect is not good. For example, heat transfer tubes have serious fouling and affect the heat transfer of the chiller. This can be judged by observing the heat transfer temperature difference between the water temperature and the evaporation temperature.
3, the water flow is too large, this can be done by observing the evaporator inlet and outlet water pressure difference, as well as the pump running current and so on.
4. After excluding the above issues, consider whether the sensor or thermometer is inaccurate.
According to the technical personnel, under normal circumstances, if the chiller fails, it will directly communicate with the manufacturer and confirm what the fault is. The user can solve the minor fault and resolve it on their own. If it cannot solve the problem, it is recommended that the chiller manufacturer arrange the after-sales service. Service personnel come to the door for maintenance, and the crew is fully maintained.
Chiller fan noise
Noise is an annoying sound, and continuous noise can also cause pollution in the surrounding environment. The causes of the noise caused by the general chiller fan can be described as follows:
When the blade rotates, it will rub against the air or it will impact. The frequency of noise is compounded by multiple frequencies, all of which are related to the speed of the fan. Suggestion: If the axial fan has the configuration of the moving wing and the static wing, the number of blades of the two is not equal, so as to avoid causing greater noise resonance.
Noise is also generated when the blades generate eddy currents. During the operation of the fan, vortexes are generated on the back of its wings. This vortex not only reduces the efficiency of the fan, but also generates noise. In order to reduce this phenomenon, the installation angle of the blades must not be too large, and the fan blades must be curved smoothly. Do not suddenly change too much.
Resonance with the air duct housing generates noise. The joints between the duct and the fan housing should be flat to avoid roughness and tearing. In addition, soundproof materials can sometimes be applied to the outside of the duct during design to reduce noise.
In addition, in addition to the fixed noise of the wind turbine itself, there are still many noise sources. Such as: bearings due to lack of precision, improper assembly or poor maintenance can cause abnormal noise. Part of the motor can also generate noise, some of which are caused by poorly designed or poorly manufactured products, but are sometimes caused by cooling fans inside and outside the motor. Therefore, in the selection of equipment must be strictly a formal product screening, consider the user-friendly design and other factors.
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At present, Shanghai Shangsuo's screw chillers, industrial refrigeration, chillers, chillers, industrial chillers, screw chillers, and air-cooled chillers have been widely used in chemical, chemical fiber, plastic, grease, food, Pharmaceuticals, military industry, printing, coating, electroplating, electronics and other industries provide high-speed development of China's industry with efficiency and quality assurance.