Lack of freon refrigerator can not meet the refrigeration effect

cold storage is used long, perhaps use period will appear but Russia is not the appearance of refrigeration, suppose that we are not in a hurry to find useful repair method, then poses a pedantic about cold storage of goods, it would pose a direct economic loss to us, so we must understand the concerned knowledge of cold storage.

1, the cold storage due to poor heat insulation function or seal, the large amount of cold loss

poor heat insulation function is due to the pipeline, such as the warehouse heat insulation wall insulation layer thickness, heat insulation and heat preservation effect is bad, it is the first design when choosing improper or construction of insulation layer thickness of heat preservation material caused by the poor quality. Repeatedly switch door or more people into the warehouse, warehouse cold energy loss will also increase the warehouse. Avoid opened the door, to avoid a lot of hot air into the warehouse. Warehouse in stock, of course, repeatedly, or were too big, heat load increases sharply, rules to be cooled to temperatures generally take a long time.

2, evaporator surface frost is too thick or too much dust, heat transfer effect down

causes library temperature drop slowly another primary reason is the evaporator heat transfer of power is low, the first is due to the too thickness of evaporator surface frost layer or dust too much cause. Because of the cold storage most of the surface temperature of the evaporator is lower than 0 ℃, relative humidity and warehouse is higher, the moisture in the air is very simple in the evaporator surface frost, ice, even influence the effect of heat transfer in the evaporator. In order to avoid the surface of the evaporator frost layer thickness, should be punctual to defrost. Here are two relatively short defrosting methods: (1) stop defrost. The compressor operation, opened the warehouse door, let library temperature rise, after being active melt frost layer, then restart the compressor. (2) cream. After the goods out of warehouse, with higher temperature of tap water directly scour evaporator tube surface, to dissolve frost layer or falling. In addition to the frost too thick will cause poor performance of the evaporator heat transfer, the evaporator surface due to long time not cleaning the dust too thick, its heat power will also be markedly reduced.

3, evaporator in more air or frozen oil, heat transfer effect down

once attached on the surface of the evaporator heat transfer tube more frozen oil, its heat transfer coefficient will decrease, as if there is more air in the pipe, the evaporator of the heat exchange area decreases, and its heat power will be significantly lower, the storehouse temperature decreasing speed is slow. In peacetime operation maintenance, therefore, should pay attention to timely eliminate heat transfer tube evaporator surface oil and discharge the air inside the evaporator, into the evaporator heat transfer power before.

4, improper throttle scheduling or congestion, refrigerant flow rate is too big or too small

improper throttle scheduling or blockage, will directly affect the flow of refrigerant entering the evaporator. When the throttle valve opening through large, refrigerant flow slants big, evaporating pressure and evaporation temperature also increases, the storehouse temperature decreasing speed will slow; Together, when the throttle valve opening through small or jams, refrigerant flow rate is reduced, the refrigerating capacity of the system also is less, the storehouse temperature drop speed will slow. Generally by querying the evaporation pressure, evaporation temperature and frost of suction pipe to differentiate between the throttle valve is suitable for refrigerant flow. Throttle valve block is the first element of refrigerant flow effects, the throttle valve block is the primary cause of ice wall and dirty. Ice wall is due to the poor drab effect of monotonous, refrigerant contained water, flowing through the throttle valve, the temperature fell to below 0 ℃, refrigerant water in the ice and jam throttle hole; Dirty plugging was due to the throttle valve import filter net accumulation of more dirt, refrigerant circulation impeded, constitute a jam.

5, refrigeration dose in the system, the lack of refrigeration talents lack

the lack of refrigerant circulation for two reasons, first one is the refrigerant filling quantity is lack, at this point, just getting enough refrigerant. Another reason is that the system refrigerant leakage is more, in this kind of situation, should first find funnelled, key to view the connection pipe, valve, found to leak parts after repair, enough of the refrigerant in charge again.

6, compressor power is low, the capacity can't meet warehouse load begged

compressor due to long time operation, such as cylinder liner and piston ring parts due to the serious wear and tear, and collaborative space increases, the sealing effect will be reduced, compressor gas transmission coefficient is decreased, the capacity will be reduced. When the heat load capacity is less than warehouse, the warehouse temperature drop, slow. By querying the compressor suction, exhaust pressure is roughly to distinguish the compressor refrigeration talents. If the compressor refrigeration ability to drop, the commonly used method is to replace the compressor cylinder, piston ring and in the case that the replacement still cannot work, you should think about the other elements, the even dismantle machine repair, troubleshooting.

this release of the refrigerant, freon manufacturers, for details, please click on the query.