What should I do if the suction pressure of the refrigeration unit is too low?
It is understood that many users in the process of using the refrigeration unit often find that the cooling effect is suddenly worse than in the past, or not cooling, what is going on? According to the industry, the poor cooling of the refrigeration unit means that the suction pressure of the equipment is too low.
Then, what is the cause of the low suction pressure of the refrigeration unit? How should users solve it? In fact, there are many reasons for the low suction pressure of the refrigeration unit, including the refrigerant filter blocking valve, not fully open, insufficient refrigerant filling, etc. The following is a brief introduction to common faults and their solutions.
Fault 1: The refrigerant filter is clogged. The refrigerant filter has an important filtering effect and should be kept open. If clogging occurs, it is necessary to clean or replace the filter regularly.
Fault 2: The expansion valve is improperly adjusted or malfunctions. In the event of such a phenomenon, it is recommended to adjust the correct or trouble-shooting immediately and replace if necessary.
Fault 3: The condenser refrigerant liquid outlet valve is not fully open. It is reported that the condenser refrigerant liquid outlet valve will not be opened safely, and the refrigeration unit will produce a low suction pressure. At this time, the valve should be fully opened.
Fault 4: The amount of water passing through the evaporator is insufficient. In this case, the cooling capacity is also lowered, and the cooling effect is not good. The user should check the water pump and water valve in time.
Fault 5: Excessive lubricant circulates in the chiller refrigeration system. If you find that a lot of lubricant is in the refrigeration system, you should find out the cause and reduce it to a suitable value.
Fault 6: When the inlet temperature of the evaporator is too low, the cooling effect is not good. The inlet water temperature setting should be increased.
Fault 7: The amount of water passing through the evaporator is insufficient. In this case, the cooling capacity is also lowered, and the cooling effect is not good. The user should check the water pump and water valve in time.
In addition, since the cooling water of the refrigeration unit is an open circuit, the tap water generally used is recycled through the cooling tower. When the content of calcium salt and magnesium salt in the water is large, it is easily decomposed and deposited on the cooling water pipe to form scale. Thereby affecting heat transfer. “If the fouling is too thick, the flow cross section of the cooling water will also shrink, the amount of water will decrease, and the condensing pressure will rise.”
In this regard, we suggest that when the user finds that the water quality of the cooling unit using the refrigeration unit is poor, it is recommended that the regular cleaning plan be completed. The cooling water pipe should be cleaned at least once a year to remove scale and other dirt from the pipe, thus preventing the pipeline. The blockage.
Excluding the above seven kinds of faults, if the user still can't find the reason, you can contact the manufacturer for repair service, which is also the significance of the formal refrigeration unit equipment manufacturers.