JPH11278762A - Control device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve power saving when an elevator is operated by dispersion and standby operation, by moving an elevator to a standby floor only when a designated standby floor for the elevator to return to a reference floor, to stand by or to disperse, is above the present floor, when the elevator is not required to be used by a user and is operated by the dispersion and standby operation, and by continuing a stoppage at the present floor if it is below the present floor. SOLUTION: When an elevator is not required to be used, if a setting for a standby floor for the purpose of return to a reference floor operation, standby and dispersion operation is checked. When the standby floor is set, conditions to carry out the dispersion and standby operation are satisfied. When the standby floor is above the present floor, since a balance weight 2 is heavier than a car with no user in it, electric power can be collected to a power source 8 from a motor 5 by a power converter 7 by making use of unbalance of the load, in order to save power, and therefore, the elevator is controlled to move to the standby floor. When the waiting floor is below the present floor, since more electric power is required for the movement on the contrary, stoppage at the present floor is continued.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator control device, and more particularly to an elevator control device effective in reducing power consumption.

[0002]

2. Description of the Related Art An elevator transports a user from a boarding floor to a destination floor in response to a use request from the user.
If all of these use requests have been serviced and there is no next service request, the elevator will be in a "drop-off" state in which it will stop at the final arrival floor or move to the first floor or other reference floor. "Return" state, "Standby" state to move around the next floor where the user is expected to arrive, or "Dispersion" state to move to the floor that prevents crowding with other elevators when there is an attached elevator Driven by

[0003] A state in which the elevator moves for the purpose of returning to the reference floor, waiting, or dispersing without using the user is hereinafter referred to as "distributed standby operation". The distributed standby operation is disclosed in, for example, Japanese Patent Application Laid-Open No. 51-89643.

[0004] In the distributed standby operation, the elevator is moved when there is no request from the user. Therefore, as a device for reducing power consumption, Japanese Patent Application Laid-Open No. 57-199766 discloses an elevator car during the distributed standby operation. A technique for turning off the lighting is disclosed.

[0005]

During the distributed standby operation, the load on the car is inevitably the lightest because there is no user in the car. At this time, in the case of an elevator having a counterweight, the counterweight is heavier than the car side of the elevator. It is possible to recover (regenerate) as. Conversely, when the elevator runs down, extra power is required to lift the heavy counterweight.

However, in the prior art, no consideration has been given to the power consumption due to load imbalance with the counterweight during the distributed standby operation.

An object of the present invention is to provide an elevator control device which achieves power saving in distributed standby operation.

[0008]

In order to achieve the above object, an elevator provided with a counterweight and a power converter for recovering (regenerating) energy caused by an imbalance in load between the rider and the counterweight. When the predetermined standby floor to be returned, standby, or dispersed during the distributed standby operation without the elevator user's use request moves to the corresponding standby floor only when it is above the current floor, and when it is below, Is provided with operation control means for continuously stopping at the current floor.

In the dispersed standby operation, the car on which the user is not riding is lighter than the counterweight, so that if the driving direction of the distributed standby operation is the upward direction, the counterweight will be lowered, and the power converter Since the energy resulting from the load imbalance can be recovered (regenerated) as electric power, power is saved.

When the operation direction of the decentralized standby operation is the descending direction, more power is required due to load imbalance. Since the stop at the current floor is continued without performing the descent operation, unnecessary power consumption can be avoided and power is saved.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a system configuration according to an embodiment of the present invention. Car 1 and counterweight 2
Is hung on the sheave 4 by the rope 3. The sheave 4 is rotated by a motor 5 to drive the car 1 and the counterweight 2. The control device 6 instructs traveling / stop of the elevator.

The power converter 7 supplies power required for running and stopping the elevator from the power source 8 to the motor 5 in accordance with a command from the control device 6. Alternatively, the power converter 7 recovers power from the motor 5 to the power supply 8 depending on the load condition.

The operation control means for realizing power saving in the distributed standby operation according to the present invention is provided as a power saving distributed standby operation control unit 6-1 in the control device 6. Here, the control device 6 performs a number of processes relating to the running and stopping of the elevator. Since these processes are known in Japanese Patent Application Laid-Open No. 51-89643 and others, the present invention will not be described in the embodiment. Only the part concerning is taken up.

FIG. 2 shows a power saving distributed standby operation control unit 6-1.
6 is a flowchart showing a power-saving distributed standby operation control process 10 executed in FIG. Power saving distributed standby operation control processing 10
Is activated periodically, for example, at 100 ms, or is activated by an interrupt signal using the setting state of a use request signal used inside the control device or a passenger detection signal in the car.

In the power saving distributed standby operation control processing 10, first, in step 10-1, a request for use from the elevator platform, in step 10-2, a request for use in the car, and in step 10-3, a request for a user in the car. , The presence or absence of each of them is checked, and if any one of 10-1 to 10-3 is present, the condition for performing the distributed standby operation is not satisfied. Then, the processing 10 ends.

If all of steps 10-1 to 10-3 are not present, the process proceeds to step 10-5. Step 10-
In step 5, it is checked whether or not there is a setting of a standby floor for the purpose of returning to the reference floor, standby or dispersion. The standby floor can be set in advance by the building manager or elevator maintenance staff storing the information in the memory in the elevator control device, or automatically set inside the control device by learning the usage status in the building. It is also possible. If the standby floor is set in step 10-5, it means that the condition for performing the distributed standby operation has been satisfied, and the process proceeds to step 10-6.

Step 10-6 is the main part of the present invention. In step 10-6, the vertical relationship between the current floor of the car and the set standby floor is confirmed. When the standby floor is higher than the current floor, the counterweight 2 is heavier than the car 1 on which the user is not riding. From the power supply 8 to the power supply 8, which saves power.
At -7, the elevator is controlled to move to the standby floor.
If the standby floor is not higher than the current floor, conversely, a large amount of electric power is required to perform the movement, so that the stop at the current floor is continued in step 10-8.

If the standby floor is not set in step 10-5, the stop at the current floor is continued in step 10-8.

According to the present embodiment, by performing the dispersed standby operation in the ascending direction, there is an effect that power is recovered by the power converter and power is saved.

By continuing the stop at the current floor without performing the dispersed standby operation in the descending direction, it is possible to avoid unnecessary power consumption for lifting the counterweight heavier than the car and thereby save power. .

Further, according to the present embodiment, there is an effect that power saving can be easily realized by a slight change of adding a direction determination process of the distributed standby operation in the control device.

[0023]

As described above, according to the present invention, there is an effect that power saving in the distributed standby operation can be achieved.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a system configuration according to an embodiment of the present invention.

FIG. 2 is a flowchart of a process for achieving power saving in the distributed standby operation.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Riding car, 2 ... Balance weight, 3 ... Rope, 4 ... Sheave, 5 ... Motor, 6 ... Control device, 6-1 ... Power saving distributed standby operation control part, 7 ... Power converter, 8 ... Power supply , 10 ... power saving distributed standby operation control processing.

Claims (1)

[Claims] 1. An elevator comprising a rider, a counterweight, a rope connecting the rider and the counterweight, a sheave for hanging the rope, a motor for driving the sheave, and running and stopping of the elevator. An elevator control device comprising: a control device for instructing the operation of the elevator; and a power converter for supplying electric power necessary for running and stopping the elevator from a power supply to the motor or recovering the electric power from the motor to the power supply in accordance with the instruction from the control device. Operation control that moves to the standby floor only when the predetermined standby floor that stands by when there is no user request is above the current floor, and continues to stop at the current floor when it is below the current floor A control device for an elevator, characterized by comprising means.