An elevator rescue system and an elevator rescue method

Abstract

This invention relates to the field of elevator equipment and discloses an elevator rescue system and an elevator rescue method. The elevator rescue system of this invention includes: a rescue control system integrated into the elevator control system; the rescue control system includes: an overspeed protection module and an automatic brake release control module; the overspeed protection module is used to control the brake device to close when the elevator car speed exceeds a preset threshold; the automatic brake release control module is used to control the brake device to close after the car descends to the door zone at a preset speed. This enables automatic rescue while ensuring elevator safety, accurately limiting the car's descent speed and stopping position, saving rescue time and ensuring rescue effectiveness.

Description

Technical Field

[0001] This invention relates to the field of elevator equipment, and in particular to an elevator rescue system and elevator rescue method. Background Technology

[0002] Elevators, as a basic building facility, are everyday tools that facilitate residents' lives. While riding an elevator, users may encounter situations where the elevator stops operating due to power outages or system malfunctions, trapping users inside. In such cases, users need to wait for rescue personnel to arrive on-site.

[0003] The inventors discovered at least the following problems with conventional rescue methods: Firstly, because it takes time for rescuers to reach the location of the trapped user in the elevator, uncontrollable factors can lead to delayed rescues and prolonged entrapment. Secondly, conventional rescue methods involve rescuers manually releasing the brake, allowing the elevator car to move under gravity until it reaches the door. Releasing the brake requires rescuers to rely on experience and visual observation to judge the car's speed and whether it has reached the door, which can easily result in the car failing to stop accurately at the landing, affecting the rescue's effectiveness. Summary of the Invention

[0004] The purpose of this invention is to provide an elevator rescue system and elevator rescue method, which enables automatic rescue while ensuring elevator safety, accurately limits the descent speed and stopping position of the car, saves rescue time and ensures rescue effectiveness.

[0005] To address the aforementioned technical problems, embodiments of the present invention provide an elevator rescue system, comprising: a rescue control system integrated into an elevator control system; the rescue control system comprising: an overspeed protection module and an automatic brake release control module; the overspeed protection module is used to control the brake device to close when the elevator car speed exceeds a preset threshold; the automatic brake release control module is used to control the brake device to close after the car descends to the door zone at a preset speed.

[0006] An embodiment of the present invention also provides an elevator rescue method applied to the above-mentioned elevator rescue system. The method includes: when a fault is detected in the elevator control system, using an automatic brake release control module to control the car to descend to the door zone at a preset speed, and then controlling the brake device to close; if the car's descent speed is detected to be greater than a preset threshold, using an overspeed protection module to control the brake device to close.

[0007] Compared to existing technologies, this invention utilizes an automatic brake release control module integrated into the elevator control system to automatically lower the car to the door zone when the elevator malfunctions, enabling automatic rescue. Simultaneously, an overspeed protection module is integrated into the elevator control system to detect the elevator car's speed. If the detected speed exceeds a preset threshold, the control module activates the brake device to prevent excessive car speed. The integrated overspeed protection module and automatic brake release control module accurately limit the car's descent speed and stopping position, saving rescue time and ensuring effective rescue.

[0008] In addition, the elevator rescue system also includes an automatic rescue device (ARD); the automatic rescue device (ARD) is used to supply power to the elevator control system when the elevator power grid fails.

[0009] In addition, the elevator rescue system also includes a manual brake release module; the manual brake release module includes a brake release button, which triggers the brake device to open based on a preset operation of the brake release button, so as to control the car to descend at a preset speed.

[0010] In addition, there are two brake release buttons, and the brake device is triggered to open based on the preset operation of both brake release buttons at the same time.

[0011] In addition, after detecting a fault in the elevator control system, before executing the automatic brake release rescue function, the following steps are also included: after meeting preset conditions, the automatic brake release control module is used to control the car to descend to the door zone at a preset speed; the preset conditions include: the safety circuit is connected and the safety switch is in normal condition, the elevator door is in the closed state and the door lock is in normal condition, the star-sealing state is normal, the power board is in normal condition, the car is not in the door zone, and the automatic brake release control module is in normal condition.

[0012] In addition, during the process of using the automatic brake release control module to control the car to descend to the door zone at a preset speed, it is detected whether the preset conditions are met; if the preset conditions are not met, the automatic brake release control module is used to control the brake device to close.

[0013] In addition, if the manual brake release module is detected to be activated, the automatic brake release control module will be automatically shut down; if the car speed is detected to be greater than the preset threshold during the activation of the manual brake release module, the holding brake device will be controlled to close.

[0014] In addition, the preset threshold is 0.3 m / s.

[0015] In addition, when a fault is detected in the elevator power grid, the automatic rescue device ARD is used to supply power to the elevator control system. The elevator control system controls the car to move to the nearest door zone and then controls the brake device to close. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments, and unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 This is a structural schematic diagram of an elevator rescue system provided according to an embodiment of the present invention;

[0018] Figure 2 This is a structural schematic diagram of an elevator rescue system provided according to an embodiment of the present invention;

[0019] Figure 3 This is a flowchart of an elevator rescue method provided according to an embodiment of the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of the present invention to enable the reader to better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0021] The division of the following embodiments is for ease of description and should not constitute any limitation on the specific implementation of the present invention. The various embodiments can be combined with and referenced by each other without contradiction.

[0022] This invention relates to an elevator rescue system, comprising: a rescue control system integrated into the elevator control system; the rescue control system includes: an overspeed protection module and an automatic brake release control module; the overspeed protection module controls the brake device to close when the elevator car speed exceeds a preset threshold; the automatic brake release control module controls the brake device to close after the car descends to the door zone at a preset speed. This enables automatic rescue while ensuring elevator safety, accurately limiting the car's descent speed and stopping position, saving rescue time and ensuring rescue effectiveness. The implementation details of the elevator rescue system of this embodiment are described below for ease of understanding and are not essential for implementing this solution.

[0023] The elevator rescue system in this embodiment is as follows: Figure 1As shown, specifically, the elevator mainboard, as the core component of the elevator control system, is responsible for monitoring the elevator status and running the elevator operation computer program logic. This embodiment utilizes the elevator mainboard as the control entity for executing rescue logic. The automatic brake release control module is connected to the elevator mainboard and controls the on / off state of the brake release power. When the brake release power is on, the brake device is energized and the brake opens. Conversely, when the brake release power is off, the brake device is de-energized and the brake closes. When a system fault is detected, automatic rescue can be performed using the automatic brake release control module. The elevator mainboard controls the control switch in the automatic brake release control module to open, the brake power is on, and the brake device is in the open state. After the car slowly descends to the door zone at a preset speed, the automatic brake release control switch closes, the brake power is off, and the brake device closes. The car stops running and the car door opens, allowing the user to exit the car. If the car reaches the door zone, the elevator mainboard will detect the door zone signal, thus ensuring the car stops at the appropriate position.

[0024] In addition, before the elevator mainboard controls the automatic brake release control module to implement automatic rescue, it needs to ensure the safety of users during the rescue process by confirming that the elevator meets preset conditions. These preset conditions include: the safety circuit is connected and the safety switch is functioning normally; the elevator door is closed and the door lock is functioning normally; the safety star is functioning normally; the power board is functioning normally; the car is not in the door zone; and the automatic brake release control module is functioning normally. If any of these preset conditions are not met, the automatic brake release function will not be activated. During automatic rescue using the automatic brake release control module, it is also necessary to constantly monitor whether the above preset conditions are still met. If any of these conditions are not met, such as detecting a disconnection in the safety circuit or door lock circuit, the brake release power is disconnected, the brake closes, and the car stops. Furthermore, if the car speed is detected to exceed a preset threshold (e.g., 0.3 m / s) during the automatic rescue process, the overspeed protection module controls the brake device to close. The car speed is fed back to the elevator mainboard by the encoder.

[0025] The overspeed protection module, automatic brake release control module, safety circuit, and door lock circuit in the system are logically connected in series. If any one of them is disconnected, the brake release power is cut off, and the brake engages. This ensures the safety of elevator rescue to the greatest extent possible.

[0026] In addition, the elevator control system also includes a frequency converter connected to the brake control. During normal elevator operation, the frequency converter and the elevator mainboard simultaneously control the brake device. Sending control signals individually from either the frequency converter or the elevator mainboard will not control the brake device, preventing misoperation and subsequent incorrect elevator control. If the frequency converter malfunctions, causing a system failure, the elevator cannot be controlled via the frequency converter. In this case, the automatic brake release control module described above or the manual brake release module mentioned below can be used to achieve automatic or manual control of the elevator. During rescue operations, the frequency converter is not required, enabling efficient rescue of users in the car. In the event of a power outage, only the automatic rescue device ARD needs to be used to power the elevator control system. The frequency converter can still work normally with the elevator mainboard to control the elevator without needing to activate the automatic brake release control module.

[0027] Compared to existing technologies, this invention utilizes an automatic brake release control module integrated into the elevator control system to automatically lower the car to the door zone when the elevator malfunctions, enabling automatic rescue. Simultaneously, an overspeed protection module is integrated into the elevator control system to detect the elevator car's speed. If the detected speed exceeds a preset threshold, the control module activates the brake device to prevent excessive car speed. The integrated overspeed protection module and automatic brake release control module accurately limit the car's descent speed and stopping position, saving rescue time and ensuring effective rescue.

[0028] In addition, such as Figure 2 As shown, the elevator rescue system also includes: an Automatic Rescue Device (ARD); the ARD is used to supply power to the elevator control system in the event of a power grid failure. The automatic brake release control module in the elevator rescue system includes two control circuits (…). Figure 2 As shown in Modules 1 and 2, even if one of the control circuits fails (normally closed), the other control circuit can still be used to cut off the brake, achieving safety redundancy. If one of the control circuits is open due to a fault, brake release rescue cannot be performed. The control circuit includes switches to enable or disable the control circuit. During automatic brake release operation, the elevator mainboard controls the switches of both control circuits to open or close. During manual brake release operation, the manual brake release module controls the switches of both control circuits to open or close respectively. The status of the switches in the control circuit is monitored by the elevator mainboard. If the elevator mainboard detects an abnormal switch status in the control circuit, it automatically disables the automatic brake release rescue function to ensure elevator safety.

[0029] The elevator rescue system also includes a manual brake release module. This module includes a manual brake release knob. When the knob is turned on, it indicates that rescue personnel have activated the manual rescue function, notifying the elevator mainboard to do so. If the knob is not turned on, the manual rescue function cannot be implemented; that is, the brake release button in the manual brake release module is invalid, and the brake device cannot be controlled via the brake release button. The manual brake release module also includes a brake release button. A preset operation on the brake release button triggers the brake device to open, controlling the car to descend at a preset speed. There are two brake release buttons, corresponding to two independent control circuits within the automatic brake release control module. During automatic brake release, the elevator mainboard controls the two control circuits to be on or off. During manual brake release, the two brake release buttons control the two control circuits to be on or off respectively. Simultaneous operation of both brake release buttons triggers the two control circuits to be on, thereby controlling the brake device to open. If only one brake release button is operated, the brake device cannot be opened, which helps prevent misoperation and further ensures the safety of elevator operation. Manual brake release rescue is not limited to fault rescue. When the automatic brake release control module is functioning normally, the manual rescue function can also be activated by turning a knob, allowing rescuers to carry out the rescue manually.

[0030] It is worth mentioning that all modules involved in this embodiment are logical modules. In practical applications, a logical unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. Furthermore, to highlight the innovative aspects of this invention, this embodiment does not introduce units that are not closely related to solving the technical problem proposed by this invention; however, this does not mean that other units are absent from this embodiment.

[0031] Embodiments of the present invention also relate to an elevator rescue method applied to the aforementioned elevator rescue system. The method includes: when a fault is detected in the elevator control system, using an automatic brake release control module to control the car to descend to the door zone at a preset speed, and then controlling the brake device to close; if the car's descent speed is detected to be greater than a preset threshold, using an overspeed protection module to control the brake device to close.

[0032] like Figure 3 As shown, the elevator rescue method includes the following steps:

[0033] Step 301: When a fault is detected in the elevator control system, the automatic brake release control module is used to control the car to descend at a preset speed.

[0034] Specifically, when a fault is detected in the elevator control system, causing the elevator to malfunction, automatic rescue is triggered. To ensure user safety during the rescue process, it is necessary to determine whether the elevator meets preset conditions. These preset conditions include: the safety circuit is connected and the safety switch is functioning normally; the elevator doors are closed and the door locks are functioning normally; the star-sealing function is functioning normally (star-sealing function is activated, no star-sealing fault); the power board is functioning normally (communication between the elevator mainboard and the power board is normal); the automatic rescue function is activated and not in manual brake release mode; the car is not in the door zone; and the automatic brake release control module is functioning normally (automatic brake release control switch detection is normal, no sticking). If all the above conditions are met, automatic brake release rescue is initiated. The elevator mainboard controls the automatic brake release control switch to open, the brake device is energized, the brake opens, and the car slowly descends.

[0035] Step 302: Determine whether the descent speed of the car is greater than the preset threshold.

[0036] If the judgment result is yes, proceed to step 303 and use the overspeed protection module to control the brake device to close.

[0037] If the judgment result is negative, proceed to step 304. When the car descends to the door zone, the automatic brake release control module controls the holding brake device to close.

[0038] Specifically, to ensure the safety of the car's descent, the car needs to be controlled at a slow descent speed. The car speed is fed back to the elevator mainboard by the encoder. If the mainboard detects that the car speed is greater than a preset threshold (e.g., 0.3 m / s), the overspeed protection module is deactivated, and the brake release is stopped. If the descent speed is consistently below the preset threshold during the descent, the elevator mainboard will detect a door zone signal when the car reaches the door zone. The mainboard will then control the automatic brake release control module to close the brake device.

[0039] In addition, if the safety circuit or door lock circuit is disconnected during the descent of the car, or if the preset conditions are not met, the automatic brake release control switch will be closed, and the brake release will be stopped.

[0040] In addition, if a power grid outage occurs at the same time as a system failure, the automatic rescue device (ARD) can provide power to complete the automatic rescue and move the elevator car to the nearest floor to stop.

[0041] In addition to the automatic rescue strategies mentioned above, manual rescue can also be performed by staff using the manual brake release module in case of system failure. The manual brake release function can be activated when the door lock is closed and the elevator is not in the door zone. Rescuers activate the manual brake release knob and continuously press brake release buttons 1 and 2 (the process ends when either button stops). The brake device is energized, the brake opens, and the car moves slowly. Similarly, to ensure safe descent of the car, if the encoder indicates that the car's descent speed exceeds 0.3 m / s, the overspeed protection switch disconnects and brake release stops. After the car is manually controlled to reach the door zone, the main board detects the door zone signal and uses the disconnection of the overspeed protection switch to control the brake device to close. The overspeed protection module, automatic brake release control module, safety circuit, and door lock circuit are logically connected in series; if any one of them is disconnected, the brake release power is disconnected, and the brake closes.

[0042] Similarly, the automatic fault release rescue and manual fault release rescue mentioned above can be performed in the event of a system power outage. After the automatic rescue device ARD provides power, the automatic fault release rescue and manual fault release rescue logic described above will be executed.

[0043] The steps of the various methods described above are only for clarity. In practice, they can be combined into one step or some steps can be split into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this patent. Adding insignificant modifications or introducing insignificant designs to the algorithm or process, but without changing the core design of the algorithm and process, are also within the scope of protection of this patent.

[0044] This invention relates to a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the method embodiments described above.

[0045] That is, those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0046] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing the present invention, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of the present invention.

Claims

1. An elevator rescue system, characterized in that, include: A rescue control system integrated into the elevator control system; The rescue control system includes: an overspeed protection module and an automatic brake release control module; The overspeed protection module is used to control the brake device to close when the elevator car speed exceeds a preset threshold. The automatic brake release control module is used to control the car to descend to the door zone at a preset speed and then control the brake device to close.

2. The elevator rescue system according to claim 1, characterized in that, Also includes: Automated Rescue Device (ARD); The automatic rescue device ARD is used to supply power to the elevator control system when the elevator power grid fails.

3. The elevator rescue system according to any one of claims 1 to 2, characterized in that, Also includes: Manual brake release module; The manual brake release module includes a brake release button. Based on a preset operation of the brake release button, the brake holding device is triggered to open, so as to control the car to descend at a preset speed.

4. The elevator rescue system according to claim 3, characterized in that, There are two brake release buttons, and the brake device is triggered to open based on the preset operation of both brake release buttons simultaneously.

5. An elevator rescue method, characterized in that, Applied to the elevator rescue system as described in any one of claims 1 to 4, the method comprises: When a fault is detected in the elevator control system, the automatic brake release control module controls the car to descend to the door zone at a preset speed and then controls the brake device to close. If the car's descent speed is detected to be greater than a preset threshold, the overspeed protection module will be used to control the brake device to close.

6. The elevator rescue method according to claim 5, characterized in that, After detecting a malfunction in the elevator control system, the following is also included: After the preset conditions are met, the automatic brake release control module is used to control the car to descend to the door zone at a preset speed. The preset conditions include: The safety circuit is connected and the safety switch is in normal condition. The elevator door is closed and the door lock is in normal condition. The star-sealing status is normal. The power board status is normal. The car is not in the door zone. The automatic brake release control module is in normal condition.

7. The elevator rescue method according to claim 6, characterized in that, Also includes: During the process of using the automatic brake release control module to control the car to descend to the door zone at a preset speed, it is detected whether the preset conditions are met. If the preset conditions are not met, the automatic brake release control module will be used to control the brake device to close.

8. The elevator rescue method according to claim 5, characterized in that, Also includes: If the manual brake release module is detected to be activated, the automatic brake release control module will be automatically shut down. If the car speed is detected to be greater than the preset threshold during the manual brake release module startup process, the brake device will be controlled to close.

9. The elevator rescue method according to any one of claims 5 to 8, characterized in that, The preset threshold is 0.3 m / s.

10. The elevator rescue method according to claim 5, characterized in that, Also includes: When a fault is detected in the elevator power grid, the automatic rescue device (ARD) is used to supply power to the elevator control system. The elevator control system then controls the car to move to the nearest door zone and controls the brake device to close.

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