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What are the disadvantages of MRL elevators compared with MR elevators

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What are the disadvantages of MRL elevators compared with MR elevators?

PUBLISH TIME: 2021-04-23

  Many people don’t know much about MRL home elevators and MR home elevators when choosing home elevators to install, let alone the difference between the two, so what are the disadvantages of MRL elevators compared with MR elevators?

 

  1. Noise, vibration and limitations of use

 

  There are two popular ways to place the mainframe of MRL: one is that the mainframe is placed on the top of the car and connected by guide wheels in the hoistway. No matter which method is used, the noise impact is very large, because due to the rigid connection, And the noise must be digested in the shaft, coupled with the sound of the brake, the sound of the fan will be amplified. Therefore, in terms of noise, MRL is significantly larger than MR.

 

What are the disadvantages of MRL elevators compared with MR elevators?

 

  2. Temperature influence

 

  The heat of the elevator is relatively large, and its various electronic components are relatively poor in high temperature resistance, and the current MR elevators and MRL elevators both use permanent magnet synchronous gearless traction machines, and the temperature of their permanent magnet synchronous motors is also It should not be too high, otherwise it is easy to cause "loss of magnetism" phenomenon. Therefore, the current national standard has clear regulations on the temperature and exhaust air volume of the computer room. The main heating components such as the main engine of MRL are all in the shaft. Due to the lack of corresponding cooling and exhaust facilities, the temperature of the machine roomless elevator has a greater impact on the main engine and control cabinet, especially the fully transparent sightseeing elevator is not suitable for installing MRL. Elevators, the hot air accumulated in the elevator cannot be discharged. Therefore, choosing this type of elevator must be heavy.

 

  3. Fault maintenance and personnel rescue

 

  The maintenance and management of MRL elevators is not as convenient as MR elevators. Maintenance and debugging of MRL elevators is troublesome, because no matter how good the elevator is, it will inevitably fail. Since the main engine of MRL elevators is installed on the beam and the main engine is in the hoistway, it is very troublesome if there is a problem with the main engine (motor). Therefore, the country The standard expressly stipulates that the safety window of MR elevators can not be added, and the MRL must be added for the convenience and safety of the rescue, overhaul and maintenance of the host. Therefore, MR elevators have an absolute advantage in maintenance. If there is space, it is recommended to use MR. 

22 Apr, 2021

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Many people don’t know much about MRL home elevators and MR home elevators when they choose to install home elevators, let alone the difference between the two, so what are the advantages of MRL elevators compared with MR elevators?

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