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The cell shaker incubator will inevitably have some abnormal conditions in daily use.
The following is an introduction to these faults: First, check that the exhaust and suction pressures of the low-temperature stage compressors of the two sets of refrigeration units are lower than the normal values.
Moreover, the suction pressure is in an evacuated state, indicating that the amount of refrigerant in the main refrigeration unit is insufficient
.
The constant temperature shaker has two sets of refrigeration units, one is the main unit and the other is the auxiliary unit.
When the cooling rate is large, the two sets of units work at the same time, and at the beginning of the temperature maintenance stage, the two sets of units still work at the same time
.
When the temperature is initially stabilized, the auxiliary unit stops working, and the main unit maintains the stability of the temperature
.
If the R23 of the main unit leaks, the cooling effect will not be large.
Since the two units work at the same time during the cooling process, there is no phenomenon that the temperature cannot be stabilized, and the indicated cooling rate decreases
.
In the temperature maintenance stage, once the auxiliary unit stops working and the main unit has no cooling effect, the air in the test chamber will slowly rise.
When the temperature rises to a certain level, the control system of the animal cell shaker incubator will start the auxiliary unit to cool down.
, drop the temperature to the vicinity of the set value (-55°C), and then the auxiliary unit stops working.
Repeatedly, failures will occur
.
So far, the cause of the failure is the leakage of refrigerant R23 in the low-temperature stage unit of the main unit
.
The refrigeration system was checked by a combination of leak detector and soapy water, and it was found that the valve stem of a hot gas bypass solenoid valve was cracked
.
Replace the solenoid valve, recharge the system with F2, and the animal cell shaker incubator runs normally
.
The following is an introduction to these faults: First, check that the exhaust and suction pressures of the low-temperature stage compressors of the two sets of refrigeration units are lower than the normal values.
Moreover, the suction pressure is in an evacuated state, indicating that the amount of refrigerant in the main refrigeration unit is insufficient
.
The constant temperature shaker has two sets of refrigeration units, one is the main unit and the other is the auxiliary unit.
When the cooling rate is large, the two sets of units work at the same time, and at the beginning of the temperature maintenance stage, the two sets of units still work at the same time
.
When the temperature is initially stabilized, the auxiliary unit stops working, and the main unit maintains the stability of the temperature
.
If the R23 of the main unit leaks, the cooling effect will not be large.
Since the two units work at the same time during the cooling process, there is no phenomenon that the temperature cannot be stabilized, and the indicated cooling rate decreases
.
In the temperature maintenance stage, once the auxiliary unit stops working and the main unit has no cooling effect, the air in the test chamber will slowly rise.
When the temperature rises to a certain level, the control system of the animal cell shaker incubator will start the auxiliary unit to cool down.
, drop the temperature to the vicinity of the set value (-55°C), and then the auxiliary unit stops working.
Repeatedly, failures will occur
.
So far, the cause of the failure is the leakage of refrigerant R23 in the low-temperature stage unit of the main unit
.
The refrigeration system was checked by a combination of leak detector and soapy water, and it was found that the valve stem of a hot gas bypass solenoid valve was cracked
.
Replace the solenoid valve, recharge the system with F2, and the animal cell shaker incubator runs normally
.
