Analysis of common failures of cryogenic coolant circulating pumps
As a commonly used experimental instrument for experiments, the low-temperature coolant circulation pump can be used in conjunction with a variety of instruments (rotary evaporators, fermentation tanks, chemical reactors, freeze drying equipment, biopharmaceutical reactors, etc.). The experimental instrument has large cooling capacity and fast cooling speed, which greatly improves work efficiency; the flow rate of the circulating pump of this machine is adjustable and can be customized, which greatly meets the actual needs of different users; all models of this machine can be operated at low temperatures according to user requirements Reasonable match with refrigeration capacity, low temperature and container capacity. In the process of using the instrument, due to improper use or routine maintenance, there are often problems of one kind or another. So how should we deal with these problems? Below we analyze some actual failure problems.
1. Failure: no temperature display
Possible reasons: check whether the circuit board connection line is off, whether the sensor is off, whether the circuit board is splashed.
Solution: Plug in the cable, dry the circuit board and turn it on.
2. Fault: no cooling or slow cooling speed
Possible reasons: whether the system is leaking, whether the system is dirty or blocked.
Solution: Ask a professional to repair it.
3. Failure: no external circulation
Possible reasons: Whether the circulating pump is blocked, whether the power box is off, whether the valve is open, whether there is freezing in the circulating pump.
Solution: Check the connection line, eliminate the blockage, and open the valve
4. Failure: The whole machine has no power
Possible reasons: leakage protector protection, fuse blown, power phase sequence is wrongly connected
Solution: adjust the position of the two live wires, replace the fuse, reset the leakage protector
In fact, experimenters should strengthen the daily maintenance and maintenance of experimental instruments, which can not only extend the service life of the instruments, but also improve the utilization efficiency. Through the above analysis of common failures of the low-temperature coolant circulation pump of the experimental instrument.
