The machine room-less elevator is relative to the organic room elevator. That is to say, the modern production technology is used to miniaturize the equipment in the equipment room under the premise of maintaining the original performance, eliminating the machine room and the control cabinet in the original machine room. Traction machines, speed limiters, etc. are moved to the top of the elevator shaft or to the side of the shaft to eliminate the traditional machine room. In order to meet the customer's special requirements for height and roof.

First, the advantages of machine room elevators compared with organic room elevators

1. The advantage of the machine room is to save space. You can only do an overhaul platform under the host.

2. Since there is no need for a machine room, it has greater benefits for the structure and cost of the building. This allows the architect to have greater flexibility and convenience in design, giving the designer greater freedom and at the same time canceling In the machine room, for the owners, the machine room-less elevators have lower construction costs than the organic room elevators.

3. Due to the special design of the overall design of the antique building and the requirements for the roof, the elevator problem must be solved within an effective height. Therefore, the machine roomless elevator is very suitable for such building needs. In addition, in places with scenic spots, the machine room is The height of the floor is high, thus destroying the local ethnic heterogeneity. If the machine room-less elevator is used, the height of the building can be effectively reduced because it is not necessary to separately set the main room of the elevator.

4. It is not convenient to set up the elevator room, such as hotels, hotel annex buildings, podiums, etc.

Second, the disadvantages of machine room elevators and organic room elevators

1. Noise, vibration and usage limitations

The host placement method of the machine room is popular today: one is placed on the car top and connected by the guide wheel in the hoistway. No matter which of the above methods is used, the noise has a great influence because of the steel connection. And the noise must be digested in the hoistway, plus the sound of the brake, the sound of the fan will be amplified. Therefore, in terms of noise, the inorganic room is obviously larger than the organic room. In addition, the rigid connection of the mainframe, the resonance phenomenon is inevitably transmitted to the car and the guide rail, and the influence on the car and the guide rail is relatively large. Therefore, the comfort of the machine room is obviously weaker than that of the organic room. Due to the influence of these two items, the machine roomless elevator is not suitable for high speed trapezoids above 1.75/s. In addition, due to the limited support force of the hoistway wall, the load capacity of the machine roomless elevator is generally not more than 1150 kg. The excessive load capacity of the hoistway wall is too high, and the thickness of the reinforced concrete is usually 200mm. Usually 240mm, not suitable for carrying too large, so the trapezoidal machine room under 1.75m / s, 1150kg can replace the organic room, and the large capacity high-speed elevator, the organic room elevator is obviously superior to the machine room elevator.

2, temperature impact

The heat output of the elevator is relatively large, and its various electronic components are relatively poor in high temperature capability. Moreover, the organic room elevators and the machine roomless elevators currently used adopt permanent magnet synchronous gearless traction machines, and their permanent magnet synchronous motors. The temperature should not be too high, otherwise it will cause "loss of magnetism". Therefore, the temperature and exhaust air volume of the equipment room are clearly defined in the national standard. The main heating components such as the main room of the machine room are in the hoistway. Because there is no corresponding cooling and exhausting facilities, the temperature of the machine roomless elevator has a great influence on the host and the control cabinet, especially the fully transparent sightseeing ladder is not suitable for installation. In the machine room-less elevator, the hot air accumulated in the elevator cannot be discharged. Therefore, you must pay attention to the choice of such elevators.

3, fault repair and personnel rescue

The maintenance and management of the machine roomless elevator is not as convenient as the elevator of the organic room. It is troublesome to repair and debug the machine roomless elevators, because even the best elevators are inevitably faulty. The machine roomless elevators are installed on the beams. The main engine is in the hoistway. If the main engine (motor) has problems, it is very troublesome. The national standard expressly stipulates that the elevator safety window of the organic room can be omitted, and the machine room must be added to save and repair and maintain the convenience and safety of the host. Therefore, the organic room elevator has an absolute advantage in maintenance. It is recommended to use the organic room. In addition, in terms of personnel rescue, the machine room-less elevator is also very troublesome. In the event of a power outage, emergency power must be installed. Generally, the elevator emergency power supply needs to invest more funds.