Due to the influence of these two,machine room less elevator do not apply to 1.75 / s or more high-speed trapezoidal. In addition, due to the limited support shaft wall to withstand the force, so there was machine room less elevator are generally not more than 1150 kg load, excessive load on the bearing shaft wall is too high, while the thickness of the reinforced concrete as we usually 200mm, brick structure usually 240mm, not suitable for carrying too large, so the 1.75m / s, 1150 kg the following alternative there is no room trapezoidal room, and a large load of high-speed elevators, elevator machine room was better than no room elevators.
Lift the heat is relatively large, while its ability to withstand high temperatures variety of electronic components than the poor, but now there is room using elevators and machine room less elevator are made of permanent magnet synchronous gearless traction machine, its permanent magnet synchronous motors the temperature should not be too high, otherwise easily lead to "loss of field" phenomenon.
So, now the national standard in the temperature, the amount of exhaust to the engine room are clearly defined. No room hosts other major heat-generating components are well hang in, because there is no corresponding cooling and ventilation facilities, leading to the elevator without machine room temperature on the host computer and the control panel is relatively large, especially in tourism ladder fully transparent and more suited to installation no room elevators, elevator gathered steam can not be discharged. Therefore, the choice must pay attention to this type of lift.
machine room less elevator maintenance and management as good as there is room elevators convenient. machine room less elevator maintenance and debugging more trouble, because even the best elevator inevitably failure, without machine room elevator is installed in the beam due to the host, the host in the hoistway, if the host (motor) problem is very troublesome,
