A Solution To Ensure Safe Transportation Of The Patient By The Medical Team In Residential Buildings With Low-Use Lifts

This article deals with the complex and demanding process of powering lifts. A stoppage of lift equipment may entail not only material costs, but also a risk to the health and lives of passengers. The authors consider the possibility of providing power supply to the lift drive by using batteries of accumulators as a backup source. Thereby the solution of urgent scientific and technical problem of ensuring the possibility to reduce the risk to life and health by unobstructed exit of passengers from the lift cabin in case of power supply from the main power line failure. The analysis is based on an example of a ZIRCON lift from LM LIFTMATERIAL GMbH (Germany) with a load-bearing capacity of 630 kg. Redundancy in the study is proposed by using several VRLA lead-acid batteries connected in parallel. The process of selection of optimum number and total capacity of batteries, as well as rational scheme of their connection is analyzed. Batteries of different manufacturers with different capacities were considered in the calculations. Attention is also given to the question of recharging, the extent to which the batteries can be restored to their rated capacity in the event of a deep discharge and the calculation of the number of possible recharging cycles for different levels of discharge during battery use as a back-up.