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Causes of failure caused by high pressure in the operation of water-cooled screw chiller

次 Source: Shenzhen Simpson Refrigeration Technology Co., Ltd. Release time: 2019-02-22 Browse: 3316 times

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The chiller is a machine that can generate refrigeration changes through the braking of electricity. In the industrial industry, chiller is often used to assist production and improve production efficiency. Simpson refrigeration manufacturers share the causes of failures caused by high pressure in the work of water-cooled screw chiller :


First, the cooling water flow is not enough to meet the flow standard. It will cause the pressure difference between the inlet and outlet water of the chiller to become smaller and the temperature difference to be larger. 外也可能管道的过滤器被异物堵住,也会导致这样的结果,因此我们需要定时清理和维修过滤网。 One of the main reasons is because the system is short of water or there is a small amount of air in the system. You can install an exhaust valve at the top of the pipeline to let the air out. In addition , the filter of the pipeline may be blocked by foreign objects. As a result, we need to regularly clean and repair the filters.


Second, the cooling water temperature is too high, resulting in poor cooling effect. Under normal circumstances, the working temperature of the chiller is between 30-35 degrees. 散热不好,从而导致水凝压力高,这种情况往往发生在夏季。 Poor heat dissipation leads to high water condensation pressure, which often occurs in summer. But there are other factors that can cause this .


(1) The cooling tower fails, such as the fan is not turned on, the water distributor does not turn, and the temperature of the cooling water in the water -cooled screw chiller is rapidly increased.


(2) The external ambient temperature is too high, so that the amount of recyclable water is small, which can be solved by increasing the amount of water in the storage tank.


Third, the refrigerant contains air and other non-condensable gases. This problem is due to incomplete evacuation during maintenance, resulting in air entry. The solution can only be evacuated again.


都偏高。 Fourth, too much refrigerant injection, which also occurs during maintenance, the specific realization of the balance pressure, suction and discharge pressure and compressor current are high. Can be solved by deflation.


5. Dirt or blockage of the condenser. 换热面积变小,效率降低也影响水流量。 Like a domestic thermos, it will form dirt after long use, which will cause the condenser to be blocked, reduce the heat exchange area, and reduce the efficiency and affect the water flow. 行清洁处理。 Realized that the pressure difference and temperature difference of the unit are large, so the unit should be cleaned regularly .

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