Bed Elevator manufacturer introduced six elevator energy-saving technologies, do you know?
1. Single well double car running technology
In order to improve the elevator carrying efficiency and the utilization rate of the shaft in high-rise buildings, in recent years, the technology of single car and double cars has appeared. According to the car position and operation status, it can be divided into three types: super double-layer connected car, adjustable positive double car linkage and double car independent operation.
The working principle of the single-car double car technology is that two independent cars in the same hoistway are monitored by sensors through an intelligent control system to prevent collisions, so that they can operate independently and safely And play the role of increasing the carrying capacity to achieve energy saving.
2. Purpose-selection intelligent technology
Through the efficient operation scheduling of the intelligent shunting method at the destination layer, the operating efficiency of the elevator can be effectively improved and the waiting time or waiting time of passengers can be reduced.
The target layer selection intelligent technology is composed of modules such as group control unit, target layer selector and floor indicator. Based on expert system, fuzzy logic and neural network control technology, it has dynamic decentralized waiting, peak self-identification, dynamic partition service, and Functions such as configuration service layer, choice of deployment strategy and timely forecast.
3. Wireless power transmission and wireless signal transmission technology
Through wireless power transmission and wireless signal transmission, the elevator car has no accompanying elevator, which can not only save the elevator, but also improve a series of safety and energy-saving problems such as load balance, signal interference, and safety performance of the elevator in operation.
The elevator car accompanying the elevator connects the car and the elevator machine room control cabinet in order to transmit power and signals. Through the interaction between the shaft wall of each layer and the transformer on the top of the car, the current frequency is increased, and a high-frequency magnetic field is generated in the magnetic core coil. When the secondary coil of the car approaches, an induced current is generated, which is then rectified to direct current to charge the battery, which serves as the power supply for the elevator car and landing door.
The elevator car side switch signal is collected by the original signal acquisition device, and then hard-wired to the car side wireless signal transmission device, the antenna transceiver sends the signal to the landing door side wireless signal transmission device, and then the signal is wired Connect to the monitoring center. The signal line from the monitoring center to the elevator car side switch is the opposite. In this way, the elevator car has no wireless signal transmission with the accompanying elevator, so as to achieve the safety and energy saving of the elevator operation.
4. Optimize the counterweight configuration
The average load rate of the elevator is about 20% of the rated load, and the currently recognized elevator balance factor is 40% -50%. After a lot of testing and analysis, industry insiders suggested that the balance factor can be optimized to 0.35 for traction drive, 0.21 for energy regeneration device, and 0.30 for hydraulic elevator, indicating that optimizing the counterweight configuration can also reduce the energy consumption of the elevator in operation.
5. Energy feedback
In elevator energy feedback, the energy recovery is generally 20% -40%, depending on the type of ladder, frequency of use, and load capacity. At present, the national elevator energy consumption standards are still in the final stage. Energy feedback energy saving is to use PWM active inverter method to install ERB device on the terminal of the original resistance braking unit of the elevator voltage inverter, so as to achieve the effect of energy feedback. This method is suitable for elevators with large load and high frequency of use. .
6. Reasonable optimization of elevator selection and management
According to the nature of the building, the service object, the use area, the flow rate and the destination, the reasonable layout of elevator types, number, operation and stop floors can achieve energy-saving effects, which is also the most pragmatic approach.
7. Linear elevator
The linear motor can directly convert electrical energy into mechanical energy in linear motion without any conversion device. A linear elevator driven by a linear motor, put into use in Tokyo, Japan in 1990, has a load capacity of 600 kg, a speed of 1.75 m / s, and a lifting height of 22.90 m.