Multi-elevator parallel control method, control device, and control system

Abstract

The application relates to the elevator technical field, and particularly discloses a multi-elevator parallel control method and a control system, which comprises the following steps: when power supply abnormity occurs in multiple traction machines and the power supply abnormity time of an abnormal traction machine is greater than a first specified threshold, external power supply is cut off, and a DC-AC inverter is controlled to inversely output emergency power to the frequency converter of the abnormal traction machine according to a specified sequence; after the time that the DC-AC inverter outputs the emergency power to the frequency converter of the last abnormal traction machine reaches a second specified threshold, the emergency power output from the DC-AC inverter to the frequency converter of the last abnormal traction machine is cut off, and the DC-AC inverter is controlled to inversely output the emergency power to the frequency converter of the next abnormal traction machine; after the DC-AC inverter inversely outputs the emergency power to each abnormal traction machine, the DC-AC inverter is controlled to close the working process, and external incoming power is waited for. The application can control multiple elevators to enter an emergency mode according to the power supply condition, so that safety is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and in particular to a multi-elevator parallel control method, control device and control system. Background Art

[0002] During the operation of the elevator, due to external power grid failure, control power failure, control system failure, safety circuit failure, poor contact between hall and car door locks and abnormal behavior of passengers, the elevator may stop in an emergency, trapping passengers in a closed car in a non-floor area.

[0003] Currently, most elevators on the market are equipped with an emergency device to safely rescue people trapped in elevator malfunctions, as shown in the invention patent application "An Emergency Automatic Rescue Device and Method for People Trapped in an Elevator" with Chinese Patent Publication No. CN109678024A. However, in practice, it has been found that since most emergency devices are only installed per elevator, when a mains power anomaly requires simultaneous control of multiple elevators, multiple emergency devices are required, significantly increasing the cost of elevator emergency stop control. Summary of the Invention

[0004] The present invention discloses a multi-elevator parallel control method, a control device and a control system, which can control multiple elevators to enter an emergency mode according to the mains power situation to ensure safety.

[0005] A first aspect of the present invention discloses a method for controlling multiple elevators in parallel, the method comprising:

[0006] When a mains power anomaly occurs in multiple traction machines, detecting whether the mains power anomaly time of the abnormal traction machine is greater than a first specified threshold;

[0007] When the first detection unit detects that the mains power abnormality time of the abnormal traction machine is greater than a first specified threshold, the external power supply is cut off, and the DC-AC inverter is controlled to invert and output emergency power to the frequency converter of the abnormal traction machine one by one according to the specified sequence;

[0008] After the time for the DC-AC inverter to output the emergency power to the frequency converter of the last abnormal traction machine reaches a second specified threshold, the emergency power output by the DC-AC inverter to the frequency converter of the last abnormal traction machine is cut off, and the DC-AC inverter is controlled to invert and output the emergency power to the frequency converter of the next abnormal traction machine;

[0009] After the DC-AC inverter inverts and outputs the emergency power to each of the abnormal traction machines, the DC-AC inverter is controlled to shut down the working process and wait for an external call.

[0010] As another optional embodiment, in the first aspect of the present invention, after controlling the DC-AC inverter to stop operating and waiting for an external call, the method further includes:

[0011] Detect whether an evacuation command is triggered; if so, execute the operation of cutting off the external power supply and controlling the DC-AC inverter to invert and output emergency power to the frequency converter of the abnormal traction machine one by one according to the specified sequence.

[0012] As another optional implementation, in the first aspect of the present invention, detecting whether an evacuation instruction is triggered includes:

[0013] Detecting whether the abnormal traction machine has a mains power abnormality again after the external power is received; if so, triggering the evacuation command;

[0014] and / or detecting whether the main switch for controlling the mains power output is disconnected and restarted; if so, triggering the evacuation command;

[0015] And / or, detect whether the control mainboard of the abnormal traction machine is disconnected and restarted; if so, trigger the evacuation command.

[0016] As another optional embodiment, in the first aspect of the present invention, the method further comprises:

[0017] Detecting whether the normal traction machine is operating in a power generation mode; if so, obtaining a converter bus voltage converted from potential energy from a converter of the normal traction machine, and outputting the converter bus voltage to a bidirectional DC power supply;

[0018] The bidirectional DC power supply is controlled to step down the inverter bus voltage, and the stepped-down inverter bus voltage is output to the energy storage battery.

[0019] As another optional implementation manner, in the first aspect of the embodiments of the present invention, the method further includes:

[0020] If it is detected that the normal traction machine is not operating in the power generation mode, detecting whether the normal traction machine is operating in the electric operation mode; if so, outputting the battery voltage in the energy storage battery to the bidirectional DC power supply;

[0021] After the battery voltage is boosted on the bidirectional DC power supply, the boosted battery voltage is output to the inverter of the normal traction machine; wherein the boosted battery voltage is lower than the inverter bus standby voltage value.

[0022] As another optional implementation, in the first aspect of the present application, before the step of detecting whether the power abnormal time of the abnormal traction machine is greater than the first specified threshold, the method further comprises:

[0023] detecting whether the main switch controlling the power supply output is open; if yes, it is judged that the control system is currently in the maintenance mode, and a first prompt information is sent out;

[0024] if it is detected that the main switch is not open, detecting whether the phase sequence relay switch is open; if yes, it is judged that the current power supply is abnormal;

[0025] determining the traction machine with the closed power supply switch as the abnormal traction machine, and sending out a second prompt information;

[0026] performing the operation of detecting whether the power abnormal time of the abnormal traction machine is greater than the first specified threshold;

[0027] if it is detected that the phase sequence relay switch is not open, detecting whether there is a traction machine with the closed power supply switch; if yes, it is judged that the traction machine with the closed power supply switch is currently in the maintenance mode, and a third prompt information is sent out.

[0028] As another optional implementation, in the first aspect of the present application, after the time that the DC-AC inverter outputs the emergency power to the frequency converter of the last abnormal traction machine reaches the second specified threshold, and before the step of cutting off the emergency power output by the DC-AC inverter to the frequency converter of the last abnormal traction machine, and controlling the DC-AC inverter to inversely output the emergency power to the frequency converter of the next abnormal traction machine, the method further comprises:

[0029] detecting whether there is a fault report; if yes, sending out a fault prompt information;

[0030] sending the fault prompt information to the associated terminal through the communication device, and waiting to receive the control instruction sent by the terminal;

[0031] when the control instruction is received, performing the operation of the control instruction.

[0032] As another optional implementation, in the first aspect of the present application, the step of detecting whether there is a fault report currently comprises:

[0033] detecting whether the contactor controlling the emergency power output has a sticking fault; if yes, reporting the contactor sticking fault;

[0034] detecting whether the contactor acts according to the working logic table; if no, reporting the detection and execution system fault;

[0035] Detect whether the bidirectional DC power supply, the DC-AC inverter, and the energy storage battery have input fault information; if so, report the equipment fault.

[0036] A second aspect of the present invention discloses a multi-elevator parallel control device, comprising:

[0037] The first detection unit is used to detect whether the abnormal mains power time of the abnormal traction machine is greater than a first specified threshold when the mains power abnormality occurs in multiple traction machines;

[0038] A cut-off and control unit, configured to cut off the external power supply when the first detection unit detects that the mains power abnormality time of the abnormal traction machine is greater than a first specified threshold, and control the DC-AC inverters to invert and output emergency power to the frequency converter of the abnormal traction machine one by one according to a specified sequence;

[0039] The cut-off and control unit is further configured to, after the time for the DC-AC inverter to output the emergency power to the frequency converter of the last abnormal traction machine reaches a second specified threshold, cut off the emergency power output by the DC-AC inverter to the frequency converter of the last abnormal traction machine, and control the DC-AC inverter to invert and output the emergency power to the frequency converter of the next abnormal traction machine;

[0040] The control and waiting unit is used to control the DC-AC inverter to shut down the working process and wait for an external call after the DC-AC inverter inverts and outputs the emergency power to each of the abnormal traction machines.

[0041] A third aspect of the present invention discloses a control system, comprising:

[0042] a memory storing executable program code;

[0043] a processor coupled to the memory;

[0044] The processor calls the executable program code stored in the memory to execute a multi-elevator parallel control method disclosed in the first aspect of the present invention.

[0045] A fourth aspect of the present invention discloses a computer-readable storage medium storing a computer program, wherein the computer program enables a computer to execute the multi-elevator parallel control method disclosed in the first aspect of the present invention.

[0046] A fifth aspect of the present invention discloses a computer program product, which, when executed on a computer, enables the computer to execute part or all of the steps of any one of the multi-elevator parallel control methods of the first aspect of the present invention.

[0047] A sixth aspect of the present invention discloses an application publishing platform, which is used to publish a computer program product. When the computer program product is run on a computer, the computer is caused to execute part or all of the steps of any one of the multi-elevator parallel control methods of the first aspect of the present invention.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] In the present invention, when multiple hoisting machines have mains power anomalies, it is detected whether the mains power anomaly time of the abnormal hoisting machine is greater than a first specified threshold value; if so, the external power supply is cut off, and the DC-AC inverter is controlled to invert and output emergency power to the inverter of the abnormal hoisting machine one by one according to the specified sequence; after the time for the DC-AC inverter to output emergency power to the inverter of the previous abnormal hoisting machine reaches a second specified threshold value, the emergency power output of the DC-AC inverter to the inverter of the previous abnormal hoisting machine is cut off, and the DC-AC inverter is controlled to invert and output emergency power to the inverter of the next abnormal hoisting machine; after the DC-AC inverter inverts and outputs emergency power to each of the abnormal hoisting machines, the DC-AC inverter is controlled to shut down the working process and wait for an external call. It can be seen that the present invention can control multiple elevators to enter emergency mode according to the mains power situation to ensure safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0051] Figure 1 This is a flow chart of a multi-elevator parallel control method disclosed in an embodiment of the present invention;

[0052] Figure 2 1 is a flow chart of another multi-elevator parallel control method disclosed in an embodiment of the present invention;

[0053] Figure 3 1 is a flow chart of another multi-elevator parallel control method disclosed in an embodiment of the present invention;

[0054] Figure 4 This is a schematic structural diagram of a multi-elevator parallel control device disclosed in an embodiment of the present invention;

[0055] Figure 5 1 is a schematic structural diagram of another multi-elevator parallel control device disclosed in an embodiment of the present invention;

[0056] Figure 6 It is a structural diagram of a control system disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0058] It should be noted that the terms "first," "second," "third," "fourth," etc. in the description and claims of the present invention are used to distinguish different objects rather than to describe a specific order. The terms "including" and "having," as well as any variations thereof, in the embodiments of the present invention, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0059] The embodiment of the present invention discloses a multi-elevator parallel control method, a control device and a control system, which can control multiple elevators to enter an emergency mode according to the mains power situation to ensure safety.

[0060] The following is a detailed description with reference to the accompanying drawings.

[0061] Example 1

[0062] See also Figure 1 , Figure 1 This is a flow chart of a multi-elevator parallel control method disclosed in an embodiment of the present invention. Figure 1 As shown, the control method is applied to a control system, which may include the following steps:

[0063] 101. When multiple traction machines have mains power anomalies, the control system detects whether the mains power anomaly time of the abnormal traction machine is greater than a first specified threshold. If so, execute steps 102 to 104. If not, end this process.

[0064] 102. The control system cuts off the external power supply and controls the DC-AC inverters to invert and output emergency power to the inverters of the abnormal traction machines one by one according to the specified sequence.

[0065] As an optional implementation, in the embodiment of the application, the DC-AC inverter can be used to invert into single-phase 220Vac in the case of power failure or abnormal power supply, and realize inverter output through the corresponding contactor breaker, and then the firewire can be divided into two parts through the action of the contactor of the corresponding traction machine, to supply 220Vac power supply emergency for the elevator.

[0066] As an optional implementation, in the embodiment of the application, the DC-AC inverter is not limited to inverting into single-phase 220Vac, and three-phase 380Vac can also be used. The detection and evacuation strategy remains unchanged, only the inverter voltage is different, which is suitable for different voltage elevators, and the application does not make any limitation.

[0067] As an optional implementation, in the embodiment of the application, when the DC-AC inverter inverts the emergency power supply to the frequency converter of the abnormal traction machine, the corresponding ARD and short normally open contact are closed to short the original elevator phase sequence relay and give an evacuation signal to the original elevator to inform the original elevator to perform evacuation work.

[0068] 103、The control system cuts off the emergency power supply output by the DC-AC inverter to the frequency converter of the previous abnormal traction machine after the time of outputting the emergency power supply by the DC-AC inverter to the frequency converter of the previous abnormal traction machine reaches the second specified threshold, and controls the DC-AC inverter to invert the emergency power supply to the frequency converter of the next abnormal traction machine.

[0069] 104、When the DC-AC inverter inverts the emergency power supply to each abnormal traction machine, the control system controls the DC-AC inverter to close the working process and waits for external power supply, ending this process.

[0070] As an optional implementation, in the embodiment of the application, when the control system controls the abnormal traction machine to evacuate, the control system can automatically schedule the elevators to evacuate in turn. For example, elevators 1, 2 and 3 need to evacuate. The control system first judges whether the external open-phase or power failure exceeds 3S. If it exceeds 3S, the external power supply is cut off, and after 5S, the elevator 1 is started to evacuate, that is, the control system controls the DC-AC inverter to invert the emergency power supply to the elevator 1 for 120S, then cuts off the power supply, then keeps the DC-AC inverter to invert the emergency power supply to the elevator 2 for 120S, then cuts off the power supply, then keeps the DC-AC inverter to invert the emergency power supply to the elevator 3 for 120S, then cuts off the power supply, and finally the control system can delay for 8 seconds, and then the DC-AC inverter closes the working process and waits for external power supply.

[0071] As an optional implementation, in this embodiment of the present invention, the control system will not initiate another evacuation after completing one evacuation. This occurs only after the elevator enters a mode other than evacuation mode. This occurs when the utility power is restored and then cuts out again, or after the main breaker for elevators 3 is pulled, or the main board is reset. If one or two elevators are stopped due to a breaker, the control system will skip this stage when scheduling another evacuation, and will only evacuate the elevators that are online.

[0072] As an optional implementation, in an embodiment of the present invention, when the power grid is abnormal, the door can be opened automatically to release people, thereby reducing the probability of people being trapped.

[0073] As an optional implementation, in an embodiment of the present invention, the present application is designed with a flag bit. After completing an evacuation, the emergency mode will not be entered again due to the unchanged input logic. The next evacuation can only be performed after entering the energy-saving or maintenance mode or emergency stop and restart.

[0074] As an optional implementation, in an embodiment of the present invention, if the mains power is restored during the emergency mode, the present application can first continue to complete the evacuation and then switch back to the normal evacuation mode with mains power supply.

[0075] As an optional implementation, in an embodiment of the present invention, a corresponding SB switch may be provided in the control system for manually disconnecting a ladder connection, while also being capable of automatically breaking the circuit in the event of overcurrent.

[0076] As an optional implementation, in an embodiment of the present invention, when the mains power is abnormal, that is, when the control system is in emergency evacuation mode, the contactor coil on the abnormal traction machine can be powered by the DC-AC inverter output.

[0077] As an optional implementation, in an embodiment of the present invention, the contactor is not on the traction machine, but the traction machine (or elevator) is powered by this contactor, that is, the contactor coil of the energy-saving action is powered by AC power, and the contactor coil of the evacuation action is powered by the inverter.

[0078] As an optional implementation, in an embodiment of the present invention, the control system can automatically identify the elevator operating mode and the number of elevators in use, and enter the corresponding mode, automatically scheduling according to the number of elevators in use, including energy saving and sequential evacuation.

[0079] As an optional implementation, in an embodiment of the present invention, the control system's main control board hardware and software are compatible with the simultaneous operation of multiple elevators. For example, if there are three elevators in use, the control system can support seven situations: 1, 2, and 3 elevators are all in use; or only 1 and 2 elevators; or only 1 and 3 elevators; or only 2 and 3 elevators; or only 1 elevator; or only 2 elevators; or only 3 elevators.

[0080] As an optional implementation, in an embodiment of the present invention, a bypass jumper cap is designed on the main control board of the control system. When the control system fails and the ladder cannot be run, the bypass jumper cap can be unplugged and the bypass ladder terminal can be inserted to disconnect the power supply of the main board and directly bypass the ladder. This is the interlocking logic.

[0081] As an optional implementation, in an embodiment of the present invention, the DC-AC inverter power supply and the mains power supply are logically interlocked with contacts, that is, the two contactors have auxiliary contacts for interlocking logic.

[0082] As an optional implementation, in an embodiment of the present invention, each traction machine is provided with an emergency light (heartbeat light (watchdog), energy-saving lamp, emergency light, fault light, maintenance light, emergency stop light, etc., this application does not impose any restrictions). After the corresponding contactor is actuated, the corresponding emergency light switch is closed and the corresponding indicator light lights up.

[0083] As an optional implementation, in this embodiment of the present invention, the application can be responsible for detecting the actual number of elevators in use, such as 1, 2, or 3, and automatically control the corresponding energy-saving function to be used. The evacuation system also automatically identifies the elevators in use and evacuates in order.

[0084] As an optional implementation, in an embodiment of the present invention, a control system of the present application is suitable for the most common 1-elevator / 2-elevator / 3-elevator applications on the market. The control board automatically identifies the number of elevators when it is powered on, and the program automatically enters the corresponding mode; a shared battery system and a set of DC-AC inverters are used, and the control system automatically dispatches emergency functions, etc., at a lower cost.

[0085] As an optional implementation, in an embodiment of the present invention, the present invention relates to multiple elevators in parallel with energy saving and power failure emergency functions, which can reduce carbon emissions. At the same time, when encountering abnormal situations such as power outages and phase failures, the equipment automatically starts the rescue program, allowing the elevator to reach the nearest level and open the door to let people in, reducing the risk of people being trapped in the elevator.

[0086] exist Figure 1 In the multi-elevator parallel control method, the control system is used as an example to describe the execution subject. It should be noted that Figure 1 The execution subject of the multi-elevator parallel control method may also be an independent device associated with the control system, which is not limited in the embodiment of the present invention.

[0087] It can be seen that implementation Figure 1 The invention discloses a multi-elevator parallel control method, which can control the multi-elevators to enter emergency mode according to the mains power supply situation to ensure safety.

[0088] In addition, implementation Figure 1 The invention discloses a multi-elevator parallel control method which can automatically identify the number of elevators and automatically enter the corresponding mode.

[0089] In addition, implementation Figure 1 The described method for controlling multiple elevators in parallel can reduce the cost of controlling multiple elevators in parallel compared to installing an independent device on each elevator.

[0090] Example 2

[0091] See also Figure 2 , Figure 2 FIG. 1 is a flow chart of another multi-elevator parallel control method disclosed in an embodiment of the present invention. Figure 2 , the multi-elevator parallel control method may include the following steps:

[0092] 201. The control system detects whether the main switch controlling the mains power supply output is disconnected. If so, step 202 is executed; if not, step 203 is executed.

[0093] 202. The control system determines that the control system is currently in maintenance mode, and issues a first prompt message, ending this process.

[0094] As an optional implementation, in an embodiment of the present invention, if the application is in the maintenance process, the mains power call will not automatically power on to ensure safety.

[0095] As an optional implementation, in this embodiment of the present invention, when the main switch is off, there is no need to determine the status of the power supply switches and phase sequence relays on each traction machine. The main switch in the machine room is closed, and maintenance mode is entered. The touch screen displays maintenance mode, and the DC-DC is off (disconnected), and the DC-AC is off (disconnected). All elevators are powered off. The control panel is powered by an onboard battery and cyclically scans the status of the main switch, the power supply switches on each traction machine, and the phase sequence relays.

[0096] As an optional implementation, in this embodiment of the present invention, when the control system determines that it is currently in maintenance mode, it can detect whether each contactor, DC-DC converter, DC-AC converter, and energy storage battery has a fault report. If one or more faults are reported, the system fault indicator will be illuminated, and the corresponding fault information will be reported via WeChat on the IoT board. WeChat can also remotely disable energy-saving and emergency functions. These functions can also be disabled when not in maintenance mode.

[0097] 203. The control system detects whether the phase sequence relay switch is disconnected. If so, execute steps 204 to 205; if not, execute steps 206 to 207.

[0098] 204. The control system determines that the current mains power is abnormal.

[0099] 205 . The control system determines the traction machine with the power switch closed as an abnormal traction machine, issues a second prompt message, and executes step 208 .

[0100] As an optional implementation, in an embodiment of the present invention, when the main switch is closed and the phase sequence relay switch is open, the control system can determine that the mains power is abnormal. The traction machine with the power switch open is in maintenance mode, and the traction machine with the power switch closed is in emergency evacuation mode. At this time, the DC-DC is off (EN is open) and the DC-AC is on (OFF / ON is closed). If the R phase has power, the control board is powered by an external power supply. If the R phase has no power, the control board is powered by the onboard battery and cyclically scans the main switch, the power switch on each traction machine, and the phase sequence relay switch status.

[0101] As an optional implementation, in an embodiment of the present invention, when it is determined that there is an abnormal traction machine in the control system, the control system can control the abnormal traction machine to evacuate, and the touch screen displays the corresponding status.

[0102] As an optional implementation, in this embodiment of the present invention, while the control system is controlling the evacuation of abnormal traction machines one by one, it can simultaneously monitor the contactor status. If the corresponding contactor disconnects during the evacuation of one elevator, the control system can detect that the contactor is not experiencing a sticking fault. The control system can also monitor the DC-DC, DC-AC, and energy storage battery for fault reports. If one or more faults are reported, the system fault indicator is illuminated, and the corresponding fault information is reported via WeChat on the IoT board. Energy-saving and emergency functions can also be remotely disabled via WeChat.

[0103] 206. The control system detects whether there is a traction machine with an unclosed power switch. If so, execute step 207; if not, end this process.

[0104] 207. The control system determines that the traction machine whose power supply switch is not closed is currently in maintenance mode, and issues a third prompt message to end this process.

[0105] As an optional implementation, in this embodiment of the present invention, when the main switch and phase sequence relay switches are closed, the control system can determine that the mains power is normal. The traction machine with the power switch off is in maintenance mode, and the traction machine with the power switch closed is in energy-saving mode. In this case, the DC-DC is turned on (EN is closed) and the DC-AC is turned off (OFF / ON is open). The control panel is powered externally and cyclically scans the status of the main switch, the power switch on each traction machine, and the phase sequence relay switch. The touch screen displays the corresponding status.

[0106] As an optional implementation, in this embodiment of the present invention, when the control system determines that it is currently in maintenance mode, it can detect whether each contactor, DC-DC, DC-AC, and energy storage battery has a fault report. If one or more faults are reported, the system fault indicator will be illuminated, and the corresponding fault information will be reported via WeChat on the IoT board. WeChat can also remotely disable energy-saving and emergency functions.

[0107] As an optional implementation, in an embodiment of the present invention, a main switch and a phase sequence relay switch for controlling the mains power supply output are provided in this application, and each traction machine is provided with a power supply switch. This application can make a judgment based on the above switches to determine whether to pull the main switch to stop the three elevators; or the main switch is not pulled but there is a phase loss or power outage; or the mains power is normal and an elevator is shut down, or the main switch is not pulled and the mains power is abnormal, and an elevator is shut down, etc., and then guide the control system to perform corresponding operations based on the combination logic.

[0108] As an optional implementation, in this embodiment of the present invention, the control system is designed with a watchdog device. If the control system crashes, it automatically resets, allowing for 24-hour uninterrupted operation without supervision. In the event of a fault in the DC-DC, DC-AC, battery, or detection and execution systems, the onboard 4G IoT module sends a fault message to WeChat on your mobile phone, including the device number, fault location, and device location. For first-time users, simply scan the QR code to bind to WeChat. Users can also use WeChat to remotely enable or disable energy-saving and emergency functions through the IoT module.

[0109] 208. When multiple traction machines have mains power anomalies, the control system detects whether the mains power anomaly time of the abnormal traction machine is greater than a first specified threshold. If so, execute steps 209 to 210. If not, end this process.

[0110] 209. The control system cuts off the external power supply and controls the DC-AC inverters to invert and output emergency power to the inverters of the abnormal traction machines one by one according to the specified sequence.

[0111] 210. After the time for the DC-AC inverter to output emergency power to the frequency converter of the last abnormal traction machine reaches a second specified threshold, detect whether a fault report has occurred. If so, execute steps 211 to 213; if not, execute steps 214 to 215.

[0112] As an optional implementation manner, in an embodiment of the present invention, detecting whether a fault report currently occurs includes:

[0113] Check whether the contactor that controls the emergency power output has a sticking fault; if so, report the contactor sticking fault;

[0114] Detecting whether the contactor acts according to the working logic table; if not, reporting the detection and execution system failure to the system;

[0115] Detecting whether the bidirectional DC power supply, DC-AC inverter and energy storage battery have input failure information; if yes, reporting the device failure.

[0116] As an optional embodiment, in the embodiment of the application, after the power supply contactor acts, the control system can automatically judge whether the contactor acts according to the working logic table, such as sticking, and the control system records as “detection and execution system failure”, and if the input logic exceeds the working logic table, the control system also records as “detection and execution system failure”.

[0117] As an optional embodiment, in the embodiment of the application, if the bidirectional DC power supply input failure information, the control system can record as “bidirectional DC power supply failure”; if the DC-AC inverter input failure information, the control system can record as “DC-AC inverter failure”; if the energy storage battery input failure information, the control system can record as “energy storage battery failure”.

[0118] As an optional embodiment, in the embodiment of the application, if there is a failure report, the control system can display through the touch screen (low configuration as a lamp panel) at the same time, and report through the Internet of Things board to WeChat public number (number + failure type).

[0119] 211, the control system sends a failure prompt information.

[0120] As an optional embodiment, in the embodiment of the application, an energy-saving lamp switch is arranged on each traction machine, and after the corresponding contactor acts, the corresponding energy-saving lamp switch is turned on, and the corresponding indicator lamp is turned on.

[0121] As an optional embodiment, in the embodiment of the application, the touch screen or lamp panel and remote alarm and control function in the application can facilitate the user to clearly understand the elevator running state and the failure encountered, and the remote control function is turned off.

[0122] 212, the control system sends a failure prompt information to the associated terminal through the communication device, and waits for receiving the control instruction sent by the terminal.

[0123] 213, when receiving the control instruction, the control system executes the operation of the control instruction, and ends the process.

[0124] As an optional implementation, in this embodiment of the present invention, this application is compatible with IoT functionality. In addition to viewing faults on the on-site display, users can also remotely view control system faults (including DC-DC faults, DC-AC faults, energy storage battery faults, and detection and execution system faults) via their mobile phone (WeChat, SMS, or phone call). Users can also remotely control: disabling the energy-saving function of a particular elevator or disabling the emergency function. Device binding is achieved by scanning the QR code on the touch screen or sticker via WeChat.

[0125] 214. The control system cuts off the emergency power supply output by the DC-AC inverter to the inverter of the previous abnormal traction machine, and controls the DC-AC inverter to invert and output the emergency power supply to the inverter of the next abnormal traction machine.

[0126] 215. After the DC-AC inverter outputs the emergency power through each abnormal traction machine, the control system controls the DC-AC inverter to shut down the working process and wait for external call.

[0127] 216. The control system detects whether an evacuation command is triggered. If so, execute step 209. If not, end this process.

[0128] As an optional implementation, in this embodiment of the present invention, the control system will not initiate another evacuation after completing one evacuation. This occurs only after the elevator enters a mode other than evacuation mode. This occurs when the utility power is restored and then cuts out again, or after the main breaker for elevators 3 is pulled, or the main board is reset. If one or two elevators are stopped due to a breaker, the control system will skip this stage when scheduling another evacuation, and will only evacuate the elevators that are online.

[0129] As an optional implementation, in an embodiment of the present invention, the present application is designed with a flag bit. After completing an evacuation, the emergency mode will not be entered again due to the unchanged input logic. The next evacuation can only be performed after entering the energy-saving or maintenance mode or emergency stop and restart.

[0130] See also Figure 3 , Figure 3 FIG. 1 is a flow chart of another multi-elevator parallel control method disclosed in an embodiment of the present invention. Figure 3 , the multi-elevator parallel control method may include the following steps:

[0131] 217. The control system detects whether the normal traction machine is operating in the power generation mode. If so, execute steps 218 to 219; if not, execute step 220.

[0132] As an optional implementation, in an embodiment of the present invention, the DC bus of the inverter is connected to the corresponding bidirectional DC-DC through the corresponding circuit breaker and the corresponding contactor remote control contactor (the contactor is remotely controlled and the circuit breaker is manually controlled on site). When generating electricity, when the inverter bus voltage rises to the threshold, the bidirectional DC-DC is used to step down the voltage and store energy in the energy storage battery. When the bus voltage drops to the threshold during electric operation, the bidirectional DC-DC is used to step up the voltage to the bus, thereby realizing power supply, reducing the acquisition of mains electricity, and saving electricity.

[0133] The control system obtains the inverter bus voltage converted from potential energy from the inverter of the normal traction machine, and outputs the inverter bus voltage to the bidirectional DC power supply.

[0134] 219. The control system controls the bidirectional DC power supply to step down the inverter bus voltage, and outputs the stepped-down inverter bus voltage to the energy storage battery, thus ending this process.

[0135] As an optional implementation, in this embodiment of the present invention, the control system is designed with an onboard battery. This battery can power the control system during an external power outage. When the mains power returns, the battery can be charged and maintained in standby mode. The battery includes a protection board to prevent overcharge and overdischarge, as well as short-circuit and overcurrent protection. When powered by the battery, the control system displays the battery charge level, allowing for intuitive monitoring of the battery level.

[0136] As an optional implementation, in an embodiment of the present invention, the capacity of the onboard battery in this application is much larger than the power used for one evacuation. It has its own protection board and will not be overcharged or over-discharged, and can be charged by the main control board.

[0137] 220. The control system detects whether the normal traction machine is operating in the electric operation mode. If so, execute steps 221 to 222. If not, end this process.

[0138] 221. The control system outputs the battery voltage in the energy storage battery to the bidirectional DC power supply.

[0139] 222. After the control system boosts the battery voltage on the bidirectional DC power supply, it outputs the boosted battery voltage to the inverter of the normal traction machine; wherein, the boosted battery voltage is less than the inverter bus standby voltage value, and this process ends.

[0140] As an optional implementation, in an embodiment of the present invention, the present application has an elevator energy saving + emergency two-in-one function, which can automatically switch between emergency and energy saving functions according to the mains power situation. When the mains power is abnormal and enters the emergency mode, it can be inverted from the energy storage battery, so that the elevator can open the door to the nearest floor to release people, reducing accidents of people being trapped; when the mains power is normal and under the energy-saving function, it automatically determines whether the elevator is running electrically or generating electricity, and performs feedback and energy storage; if the elevator loses power due to maintenance, it enters the maintenance mode and does not perform emergency inversion.

[0141] As an optional implementation, in the embodiments of the present invention, existing inverter elevators can be added with simple modifications. After the modification, the elevator can immediately become more energy-efficient and environmentally friendly, generating economic value for users while improving safety.

[0142] As an optional implementation method, in the embodiment of the present invention, the present application realizes the integration of energy saving and emergency response. At the same time, the energy storage battery can withstand continuous impact of large currents, is not afraid of damage from long-term parking and over-discharge, and is safe and will not catch fire or explode.

[0143] It can be seen that implementation Figures 2 and 3 Another multi-elevator parallel control method described herein can control multiple elevators to enter an emergency mode according to the mains power situation to ensure safety.

[0144] In addition, implementation Figures 2 and 3 Another multi-elevator parallel control method described is capable of storing electric energy in a power generation mode and releasing electric energy in a motoring mode, thereby achieving energy saving effects.

[0145] Example 3

[0146] See also Figure 4 , Figure 4 This is a schematic diagram of the structure of a multi-elevator parallel control device disclosed in an embodiment of the present invention. Figure 4 The control device 300 is applied to a control system and may include a first detection unit 301, a cut-off and control unit 302, and a control and waiting unit 303, wherein:

[0147] The first detection unit 301 is configured to detect whether the abnormal mains power time of the abnormal traction machine is greater than a first specified threshold when a mains power abnormality occurs in multiple traction machines.

[0148] The cut-off and control unit 302 is used to cut off the external power supply when the first detection unit 301 detects that the abnormal mains power time of the abnormal traction machine is greater than the first specified threshold, and control the DC-AC inverter to invert and output emergency power to the frequency converter of the abnormal traction machine one by one according to the specified sequence.

[0149] As an optional implementation, in an embodiment of the present invention, the cut-off and control unit 302 is also used to cut off the emergency power output by the DC-AC inverter to the inverter of the previous abnormal traction machine after the time for the DC-AC inverter to output the emergency power to the inverter of the previous abnormal traction machine reaches a second specified threshold, and control the DC-AC inverter to invert and output the emergency power to the inverter of the next abnormal traction machine.

[0150] The control and waiting unit 303 is used to control the DC-AC inverter to shut down the working process and wait for an external call after the DC-AC inverter inverts and outputs the emergency power to each abnormal traction machine.

[0151] As an optional implementation, in an embodiment of the present invention, a DC-AC inverter can be used to invert into single-phase 220Vac when there is a power outage or abnormal mains power, and realize the inverter output through the corresponding contactor circuit breaker. Subsequently, by controlling the action of the contactors corresponding to multiple traction machines, the live wire can be divided into two, and the 220Vac power supply can be supplied to the elevator for emergency.

[0152] As an optional implementation, in an embodiment of the present invention, the DC-AC inverter is not limited to inverting into single-phase 220Vac, three-phase 380Vac is also acceptable, the detection and evacuation strategies remain unchanged, only the inverter voltage is different to adapt to elevators of different voltages, and this application does not impose any restrictions.

[0153] As an optional implementation, in an embodiment of the present invention, when the DC-AC inverter inverts and outputs the emergency power supply to the frequency converter of the abnormal traction machine, the corresponding ARD and short normally open contacts are closed to short-circuit the original elevator phase sequence relay and give the original elevator an evacuation signal to inform the original elevator to evacuate.

[0154] As an optional implementation, in an embodiment of the present invention, when the control system controls the abnormal traction machine to evacuate, the control system can automatically schedule each elevator to evacuate in sequence. For example, if elevators 1, 2, and 3 all need to be evacuated, the first detection unit 301 can first determine whether the external phase loss or power outage exceeds 3S, cut off the external power supply after 3S, and start supplying elevator 1 for evacuation after 5S, that is, cut off and control unit 302 controls the DC-AC inverter to invert and output emergency power to elevator 1 for 120S before cutting off the power supply, and then the DC-AC inverter inverts and outputs emergency power to elevator 2 and keeps it for 120S before disconnecting it, and then the DC-AC inverter inverts and outputs emergency power to elevator 3 and keeps it for 120S before disconnecting it. Finally, the control and waiting unit 303 can delay the DC-AC inverter to shut down the working process for another 8 seconds and wait for an external call.

[0155] As an optional implementation, in this embodiment of the present invention, the control system will not initiate another evacuation after completing one evacuation. This occurs only after the elevator enters a mode other than evacuation mode. This occurs when the utility power is restored and then cuts out again, or after the main breaker for elevators 3 is pulled, or the main board is reset. If one or two elevators are stopped due to a breaker, the control system will skip this stage when scheduling another evacuation, and will only evacuate the elevators that are online.

[0156] As an optional implementation, in an embodiment of the present invention, when the power grid is abnormal, the door can be opened automatically to release people, thereby reducing the probability of people being trapped.

[0157] As an optional implementation, in an embodiment of the present invention, the present application is designed with a flag bit. After completing an evacuation, the emergency mode will not be entered again due to the unchanged input logic. The next evacuation can only be performed after entering the energy-saving or maintenance mode or emergency stop and restart.

[0158] As an optional implementation, in an embodiment of the present invention, if the mains power is restored during the emergency mode, the present application can first continue to complete the evacuation and then switch back to the normal evacuation mode with mains power supply.

[0159] As an optional implementation, in an embodiment of the present invention, a corresponding SB switch may be provided in the control system for manually disconnecting a ladder connection, while also being capable of automatically breaking the circuit in the event of overcurrent.

[0160] As an optional implementation, in an embodiment of the present invention, when the mains power is abnormal, that is, when the control system is in emergency evacuation mode, the contactor coil on the abnormal traction machine can be powered by the DC-AC inverter output.

[0161] As an optional implementation, in an embodiment of the present invention, the contactor is not on the traction machine, but the traction machine (or elevator) is powered by this contactor, that is, the contactor coil of the energy-saving action is powered by AC power, and the contactor coil of the evacuation action is powered by the inverter.

[0162] As an optional implementation, in an embodiment of the present invention, the control system can automatically identify the elevator operating mode and the number of elevators in use, and enter the corresponding mode, automatically scheduling according to the number of elevators in use, including energy saving and sequential evacuation.

[0163] As an optional implementation, in an embodiment of the present invention, the control system main control board hardware and software are compatible with the simultaneous operation of multiple elevators. For example, if there are three elevators in use at this time, then the control system can support 1, 2, and 3 elevators all being in use, or only 1 and 2 elevators, or only 1 and 3 elevators, or only 2 and 3 elevators, or only 1 elevator, or only 2 elevators, or only 3 elevators, a total of 7 situations.

[0164] As an optional implementation, in an embodiment of the present invention, a bypass jumper cap is designed on the main control board of the control system. When the control system fails and the ladder cannot be run, the bypass jumper cap can be unplugged and the bypass ladder terminal can be inserted to disconnect the power supply of the main board and directly bypass the ladder. This is the interlocking logic.

[0165] As an optional implementation, in an embodiment of the present invention, the DC-AC inverter power supply and the mains power supply are logically interlocked with contacts, that is, the two contactors have auxiliary contacts for interlocking logic.

[0166] As an optional implementation, in an embodiment of the present invention, each traction machine is provided with an emergency light (heartbeat (watchdog), energy saving, emergency, fault, maintenance, emergency stop light, etc., this application does not impose any restrictions). After the corresponding contactor is actuated, the corresponding emergency light switch is closed and the corresponding indicator light lights up.

[0167] As an optional implementation, in this embodiment of the present invention, the application can be responsible for detecting the actual number of elevators in use, such as 1, 2, or 3, and automatically control the corresponding energy-saving function to be used. The evacuation system also automatically identifies the elevators in use and evacuates in order.

[0168] As an optional implementation, in an embodiment of the present invention, a control system of the present application is suitable for the most common 1-elevator / 2-elevator / 3-elevator applications on the market. The control board automatically identifies the number of elevators when it is powered on, and the program automatically enters the corresponding mode; a shared battery system and a set of DC-AC inverters are used, and the control system automatically dispatches emergency functions, etc., at a lower cost.

[0169] It can be seen that implementation Figure 4 The control device described can control multiple elevators to enter emergency mode according to the mains power situation to ensure safety.

[0170] In addition, implementation Figure 4 The control device described can automatically identify the number of ladders and automatically enter the corresponding mode.

[0171] In addition, implementation Figure 4 The control device described can reduce the cost of controlling multiple elevators in parallel.

[0172] Example 4

[0173] See also Figure 5 , Figure 5 This is a schematic diagram of the structure of another multi-elevator parallel control device disclosed in an embodiment of the present invention. Figure 5 The control device is composed of Figure 4 The control device is optimized. Figure 4 Compared with the control device, Figure 5 The control device also includes:

[0174] The second detection unit 304 is configured to detect whether an evacuation instruction is triggered after the control and waiting unit 303 controls the DC-AC inverter to shut down the working process and waits for an external call.

[0175] The first execution unit 305 is used to cut off the external power supply and control the DC-AC inverter to invert and output emergency power to the inverter of the abnormal traction machine one by one according to the specified sequence when the second detection unit 304 detects that an evacuation command is triggered.

[0176] As an optional implementation, in this embodiment of the present invention, the control system will not initiate another evacuation after completing one evacuation. This occurs only after the elevator enters a mode other than evacuation mode. This occurs when the utility power is restored and then cuts out again, or after the main breaker for elevators 3 is pulled, or the main board is reset. If one or two elevators are stopped due to a breaker, the control system will skip this stage when scheduling another evacuation, and will only evacuate the elevators that are online.

[0177] As an optional implementation, in an embodiment of the present invention, the present application is designed with a flag bit. After completing an evacuation, the emergency mode will not be entered again due to the unchanged input logic. The next evacuation can only be performed after entering the energy-saving or maintenance mode or emergency stop and restart.

[0178] and Figure 4 Compared with the control device, Figure 5 The second detection unit 304 includes:

[0179] The first detection subunit 3041 is used to detect whether the abnormal traction machine has a mains power abnormality again after the external power is received;

[0180] and / or, detecting whether the main switch for controlling the mains power output is disconnected and restarted;

[0181] And / or, used to detect whether the control mainboard of the abnormal traction machine is disconnected and restarted.

[0182] The triggering subunit 3042 is used to trigger an evacuation command when the first detecting subunit 3041 detects that the abnormal traction machine has a mains power abnormality again after the external power is received;

[0183] and / or, for triggering an evacuation command when the first detection subunit 3041 detects that the main switch for controlling the mains power supply output is disconnected and restarted;

[0184] And / or, it is used to trigger an evacuation command when the first detection subunit 3041 detects that the control mainboard of the abnormal traction machine is disconnected and restarted.

[0185] and Figure 4 Compared with the control device, Figure 5The control device also includes:

[0186] The third detection unit 306 is used to detect whether the normal traction machine is operating in the power generation operation mode.

[0187] The acquisition and output unit 307 is used to obtain the inverter bus voltage converted from potential energy from the inverter of the normal traction machine when the third detection unit 306 detects that the normal traction machine is operating in the power generation operation mode, and output the inverter bus voltage to the bidirectional DC power supply.

[0188] The control and output unit 308 is used to control the bidirectional DC power supply to step down the inverter bus voltage and output the stepped-down inverter bus voltage to the energy storage battery.

[0189] As an optional implementation, in an embodiment of the present invention, the inverter DC bus is connected to the corresponding bidirectional DC-DC through a corresponding circuit breaker and a corresponding contactor remote control contactor. When generating electricity, when the inverter bus voltage rises to a threshold, the bidirectional DC-DC is used to step down the voltage and store energy in the energy storage battery. When electric power is generated, the bus voltage drops to a threshold and is boosted to the bus through the bidirectional DC-DC, thereby realizing power supply, reducing the acquisition of mains electricity, and saving electricity.

[0190] As an optional implementation, in this embodiment of the present invention, the control system is designed with an onboard battery. This battery can power the control system during an external power outage. When the mains power returns, the battery can be charged and maintained in standby mode. The battery includes a protection board to prevent overcharge and overdischarge, as well as short-circuit and overcurrent protection. When powered by the battery, the control system displays the battery charge level, allowing for intuitive monitoring of the battery level.

[0191] As an optional implementation, in an embodiment of the present invention, the capacity of the onboard battery in this application is much larger than the power used for one evacuation. It has its own protection board and will not be overcharged or over-discharged, and can be charged by the main control board.

[0192] and Figure 4 Compared with the control device, Figure 5 The control device also includes:

[0193] As an optional implementation, in an embodiment of the present invention, the third detection unit 306 is further configured to detect whether the normal traction machine is operating in the electric operation mode when the third detection unit 306 detects that the normal traction machine is not operating in the power generation operation mode.

[0194] The output unit 309 is used to output the battery voltage in the energy storage battery to the bidirectional DC power supply when the third detection unit 306 detects that the normal traction machine is not operating in the electric operation mode.

[0195] As an optional implementation, in an embodiment of the present invention, the output unit 309 is also used to boost the battery voltage on the bidirectional DC power supply and then output the boosted battery voltage to the inverter of the normal traction machine; wherein the boosted battery voltage is less than the inverter bus standby voltage value.

[0196] As an optional implementation, in an embodiment of the present invention, this application has an elevator energy saving + emergency two-in-one function, which can automatically switch between emergency and energy saving functions according to the mains power situation. When the mains power is abnormal and enters the emergency mode, it can be inverted from the energy storage battery, so that the elevator can open the door and let people out at the nearest level with a light load, reducing accidents of people being trapped; when the mains power is normal and under the energy-saving function, it automatically determines whether the elevator is running electrically or generating electricity, and performs feedback and energy storage; if the elevator loses power due to maintenance, it enters the maintenance mode and does not perform emergency inversion.

[0197] As an optional implementation, in the embodiments of the present invention, existing inverter elevators can be added with simple modifications. After the modification, the elevator can immediately become more energy-efficient and environmentally friendly, generating economic value for users while improving safety.

[0198] As an optional implementation method, in the embodiment of the present invention, the present application realizes the integration of energy saving and emergency response. At the same time, the battery can withstand continuous impact of large currents, is not afraid of damage from long-term over-discharge, and is safe and will not catch fire or explode.

[0199] and Figure 4 Compared with the control device, Figure 5 The control device also includes:

[0200] The fourth detection unit 310 is configured to detect whether the main switch controlling the mains power output is disconnected before the first detection unit 301 detects whether the mains power abnormality time of the abnormal traction machine is greater than a first specified threshold.

[0201] The judging and prompting unit 311 is configured to judge that the control system is currently in the maintenance mode and issue a first prompt message when the fourth detecting unit 310 detects that the main switch controlling the mains power supply output is disconnected.

[0202] As an optional implementation, in an embodiment of the present invention, if the application is in the maintenance process, the mains power call will not automatically power on to ensure safety.

[0203] As an optional implementation, in this embodiment of the present invention, when the fourth detection unit 310 detects that the main switch is disconnected, there is no need to determine the status of the power supply switches and phase sequence relays on each traction machine. At this time, the machine room main switch is closed, and maintenance mode is entered. The touch screen displays maintenance mode, and the DC-DC is off (disconnected) and the DC-AC is off (disconnected). All elevators are powered off. The control board is powered by the onboard battery and cyclically scans the status of the main switch, the power supply switches on each traction machine, and the phase sequence relays.

[0204] As an optional implementation, in this embodiment of the present invention, when the control system determines that it is currently in maintenance mode, the fourth detection unit 310 can also detect whether any faults have been reported by the contactors, DC-DC converters, DC-AC converters, and energy storage batteries. If one or more faults are reported, the system fault indicator is illuminated, and the corresponding fault information is reported via WeChat on the IoT board. WeChat can also remotely disable energy-saving and emergency functions.

[0205] As an optional implementation, in an embodiment of the present invention, the fourth detection unit 310 is further configured to detect whether the phase sequence relay switch is disconnected when the fourth detection unit 310 detects that the main switch is not disconnected.

[0206] The judging unit 312 is configured to judge that an abnormality occurs in the current mains power supply when the fourth detecting unit 310 detects that the phase sequence relay switch is disconnected.

[0207] The determining and prompting unit 313 is configured to determine the traction machine with the power supply switch closed as an abnormal traction machine and issue a second prompt message.

[0208] The second execution unit 314 is configured to execute the operation of detecting one by one whether the abnormal mains power time of the abnormal traction machine is greater than a first specified threshold.

[0209] As an optional implementation, in an embodiment of the present invention, when the main switch is closed and the phase sequence relay switch is open, the control system can determine that the mains power is abnormal. The traction machine with the power switch open is in maintenance mode, and the traction machine with the power switch closed is in emergency evacuation mode. At this time, the DC-DC is off (EN is open) and the DC-AC is on (OFF / ON is closed). If the R phase has power, the control board is powered by an external power supply. If the R phase has no power, the control board is powered by the onboard battery and cyclically scans the main switch, the power switch on each traction machine, and the phase sequence relay switch status.

[0210] As an optional implementation, in an embodiment of the present invention, when it is determined that there is an abnormal traction machine in the control system, the control system can control the abnormal traction machine to evacuate, and the touch screen displays the corresponding status.

[0211] As an optional implementation, in this embodiment of the present invention, while the control system is controlling the evacuation of abnormal traction machines one by one, it can simultaneously monitor the contactor status. If the corresponding contactor disconnects during the evacuation of one elevator, the control system can detect that the contactor is not experiencing a sticking fault. The control system can also monitor the DC-DC, DC-AC, and energy storage battery for fault reports. If one or more faults are reported, the system fault indicator is illuminated, and the corresponding fault information is reported via WeChat on the IoT board. Energy-saving and emergency functions can also be remotely disabled via WeChat.

[0212] As an optional implementation, in an embodiment of the present invention, the fourth detection unit 310 is further configured to detect whether there is a traction machine with an unclosed power switch when the fourth detection unit 310 detects that the phase sequence relay switch is not disconnected.

[0213] As an optional implementation, in an embodiment of the present invention, the judgment and prompting unit 311 is also used to determine that the traction machine with the unclosed power switch is currently in maintenance mode when the fourth detection unit 310 detects that there is a traction machine with the unclosed power switch, and to issue a third prompt message.

[0214] As an optional implementation, in this embodiment of the present invention, when the main switch and phase sequence relay switches are closed, the control system can determine that the mains power is normal. The traction machine with the power switch off is in maintenance mode, and the traction machine with the power switch closed is in energy-saving mode. In this case, the DC-DC is turned on (EN is closed) and the DC-AC is turned off (OFF / ON is open). The control panel is powered externally and cyclically scans the status of the main switch, the power switch on each traction machine, and the phase sequence relay switch. The touch screen displays the corresponding status.

[0215] As an optional implementation, in this embodiment of the present invention, when the control system determines that it is currently in maintenance mode, it can detect whether each contactor, DC-DC, DC-AC, and energy storage battery has a fault report. If one or more faults are reported, the system fault indicator will be illuminated, and the corresponding fault information will be reported via WeChat on the IoT board. WeChat can also remotely disable energy-saving and emergency functions.

[0216] As an optional implementation, in an embodiment of the present invention, a main switch and a phase sequence relay switch for controlling the mains power supply output are provided in this application, and each traction machine is provided with a power supply switch. This application can make a judgment based on the above switches to determine whether to pull the main switch to stop the three elevators; or the main switch is not pulled but there is a phase loss or power outage; or the mains power is normal and an elevator is shut down, or the main switch is not pulled and the mains power is abnormal, and an elevator is shut down, etc., and then guide the control system to perform corresponding operations based on the combination logic.

[0217] As an optional implementation, in this embodiment of the present invention, the control system is designed with a watchdog device. If the control system crashes, it automatically resets, allowing for 24-hour uninterrupted operation without supervision. In the event of a fault in the DC-DC, DC-AC, battery, or detection and execution systems, the onboard 4G IoT module sends a fault message to WeChat on your mobile phone, including the device number, fault location, and device location. For first-time users, simply scan the QR code to bind to WeChat. Users can also use WeChat to remotely enable or disable energy-saving and emergency functions through the IoT module.

[0218] and Figure 4 Compared with the control device, Figure 5 The control device also includes:

[0219] The fifth detection unit 315 is used to cut off and control the control unit 302 after the time for the DC-AC inverter to output the emergency power supply to the inverter of the previous abnormal traction machine reaches a second specified threshold, and before cutting off the emergency power supply output by the DC-AC inverter to the inverter of the previous abnormal traction machine, and controlling the DC-AC inverter to invert and output the emergency power supply to the inverter of the next abnormal traction machine, to detect whether a fault report occurs currently.

[0220] The prompt unit 316 is configured to issue a fault prompt message when the fifth detection unit 315 detects that a fault is currently being reported.

[0221] The sending and waiting unit 317 is used to send fault prompt information to the associated terminal through the communication device and wait for the control instruction sent by the receiving terminal;

[0222] The third execution unit 318 is configured to execute the operation of the control instruction upon receiving the control instruction.

[0223] As an optional implementation, in this embodiment of the present invention, this application is compatible with IoT functionality. In addition to viewing faults on the on-site display, users can also remotely view control system faults (including DC-DC faults, DC-AC faults, energy storage battery faults, and detection and execution system faults) via their mobile phone (WeChat, SMS, or phone call). Users can also remotely control: disabling the energy-saving function of a particular elevator or disabling the emergency function. Device binding is achieved by scanning the QR code on the touch screen or sticker via WeChat.

[0224] and Figure 4 Compared with the control device, Figure 5 The fifth detection unit 315 includes:

[0225] The second detection subunit 3151 is used to detect whether a contactor that controls the emergency power output has a sticking fault.

[0226] The reporting subunit 3152 is configured to report a contactor adhesion fault when the second detection subunit 3151 detects that the contactor controlling the emergency power output has a adhesion fault.

[0227] As an optional implementation, in the embodiment of the present invention, the second detection subunit 3151 is further used to detect whether the contactor operates according to the working logic table.

[0228] As an optional implementation, in an embodiment of the present invention, the reporting subunit 3152 is further configured to report a detection and execution system failure when the second detection subunit 3151 detects that the contactor does not operate according to the working logic table.

[0229] As an optional implementation, in an embodiment of the present invention, the second detection subunit 3151 is further configured to detect whether the bidirectional DC power supply, the DC-AC inverter, and the energy storage battery have input fault information.

[0230] As an optional implementation, in an embodiment of the present invention, the reporting subunit 3152 is also used to report equipment failure when the second detection subunit 3151 detects fault information input into the bidirectional DC power supply, DC-AC inverter and energy storage battery.

[0231] As an optional implementation, in an embodiment of the present invention, after the power supply contactor is actuated, the control system can automatically determine whether the contactor is actuated according to the working logic table. If adhesion occurs, the control system records it as "detection and execution system failure". If the input logic exceeds the working logic table, the control system also records it as "detection and execution system failure".

[0232] As an optional implementation, in an embodiment of the present invention, if the bidirectional DC power supply inputs fault information, the control system may record it as "bidirectional DC power supply fault"; if the DC-AC inverter inputs fault information, the control system may record it as "DC-AC inverter fault"; if the energy storage battery inputs fault information, the control system may record it as "energy storage battery fault".

[0233] As an optional implementation, in an embodiment of the present invention, if there is a fault report, the control system can display it through the touch screen (light board for low-end configuration) and report it through the Internet of Things board, and report it to the WeChat public account (number + fault type).

[0234] As an optional implementation, in an embodiment of the present invention, each traction machine is provided with an energy-saving lamp switch. After the corresponding contactor is actuated, the corresponding energy-saving lamp switch is closed and the corresponding indicator light is lit.

[0235] As an optional implementation, in an embodiment of the present invention, the touch screen or light board and remote alarm and control functions in this application can help users to clearly understand the elevator operation status and what kind of fault it encounters, as well as to turn off the remote control function.

[0236] It can be seen that implementation Figure 5 Another multi-elevator parallel control device described can control multiple elevators to enter emergency mode according to the mains power situation to ensure safety.

[0237] In addition, implementation Figure 5 Another multi-elevator parallel control device described is capable of storing electric energy in a power generation mode and releasing electric energy in a motoring mode, thereby achieving energy-saving effects.

[0238] Example 5

[0239] See also Figure 6 , Figure 6 It is a structural diagram of a control system disclosed in an embodiment of the present invention.

[0240] like Figure 6 As shown, the control system may include:

[0241] A memory 501 storing executable program code;

[0242] a processor 502 coupled to the memory 501;

[0243] The processor 502 calls the executable program code stored in the memory 501 and executes Figures 1 and 2 Any method for controlling multiple elevators in parallel.

[0244] An embodiment of the present invention discloses a computer-readable storage medium storing a computer program, wherein the computer program enables a computer to execute Figures 1 and 2 Any method for controlling multiple elevators in parallel.

[0245] The embodiment of the present invention further discloses a computer program product, wherein when the computer program product is run on a computer, the computer is caused to execute Figures 1 and 2 Any method for controlling multiple elevators in parallel.

[0246] Those skilled in the art will appreciate that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, including a read-only memory (ROM), a random access memory (RAM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium capable of carrying or storing data.

[0247] The above is a detailed introduction to a multi-elevator parallel control method and control system disclosed in an embodiment of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only intended to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A multi-elevator parallel control method, characterized in that: include: When a mains power anomaly occurs in multiple traction machines, detecting whether the mains power anomaly time of the abnormal traction machine is greater than a first specified threshold; When the first detection unit detects that the mains power abnormality time of the abnormal traction machine is greater than the first specified threshold, the external power supply is cut off, and the DC-AC inverter is controlled to invert and output emergency power to the frequency converter of the abnormal traction machine one by one according to the specified sequence; After the time for the DC-AC inverter to output the emergency power to the frequency converter of the last abnormal traction machine reaches a second specified threshold, the emergency power output by the DC-AC inverter to the frequency converter of the last abnormal traction machine is cut off, and the DC-AC inverter is controlled to invert and output the emergency power to the frequency converter of the next abnormal traction machine; After the DC-AC inverter inverts and outputs the emergency power to each of the abnormal traction machines, the DC-AC inverter is controlled to shut down the working process and wait for an external call; After controlling the DC-AC inverter to stop operating and waiting for an external call, the method further includes: Detect whether an evacuation command is triggered; if so, execute the operation of cutting off the external power supply and controlling the DC-AC inverter to invert and output emergency power to the inverter of the abnormal traction machine one by one according to the specified sequence; The detecting whether an evacuation command is triggered includes: Detecting whether the abnormal traction machine has a mains power abnormality again after the external power is received; if so, triggering the evacuation command; and / or detecting whether the main switch for controlling the mains power output is disconnected and restarted; if so, triggering the evacuation command; and / or, detecting whether the control mainboard of the abnormal traction machine is disconnected and restarted; if so, triggering the evacuation command; Before detecting whether the abnormal mains power time of the abnormal traction machine is greater than a first specified threshold, the method further includes: Detecting whether the main switch controlling the mains power supply output is disconnected; if so, determining that the control system is currently in maintenance mode and issuing a first prompt message; If it is detected that the main switch is not disconnected, check whether the phase sequence relay switch is disconnected; if so, determine that the current mains power is abnormal; determining the traction machine with the power supply switch closed as the abnormal traction machine and issuing a second prompt message; Executing the operation of detecting whether the abnormal mains power time of the abnormal traction machine is greater than a first specified threshold; If it is detected that the phase sequence relay switch is not disconnected, detecting whether there is a traction machine whose power supply switch is not closed; if so, determining that the traction machine whose power supply switch is not closed is currently in maintenance mode, and issuing a third prompt message; After the time for the DC-AC inverter to output the emergency power to the inverter of the last abnormal traction machine reaches a second specified threshold, and before the DC-AC inverter is cut off from outputting the emergency power to the inverter of the last abnormal traction machine and controlling the DC-AC inverter to invert and output the emergency power to the inverter of the next abnormal traction machine, the method further includes: Check whether there is a fault report currently; if so, issue a fault prompt message; Sending the fault prompt information to the associated terminal through the communication device, and waiting to receive the control instruction sent by the terminal; Upon receiving the control instruction, executing the operation of the control instruction; The detecting whether a fault report is currently occurring includes: Check whether the contactor that controls the emergency power supply output has a sticking fault; if so, report the contactor sticking fault; Detect whether the contactor operates according to the working logic table; if not, report the detection and execution system failure; Detect whether the bidirectional DC power supply, the DC-AC inverter and the energy storage battery have input fault information; if so, report the equipment fault.

2. The method according to any one of claim 1, characterized in that The method further comprises: Detecting whether the normal traction machine is operating in a power generation mode; if so, obtaining a converter bus voltage converted from potential energy from a converter of the normal traction machine, and outputting the converter bus voltage to a bidirectional DC power supply; The bidirectional DC power supply is controlled to step down the inverter bus voltage, and the stepped-down inverter bus voltage is output to the energy storage battery.

3. The method according to claim 2, characterized in that The method further comprises: If it is detected that the normal traction machine is not operating in the power generation mode, detecting whether the normal traction machine is operating in the electric operation mode; if so, outputting the battery voltage in the energy storage battery to the bidirectional DC power supply; After the battery voltage is boosted on the bidirectional DC power supply, the boosted battery voltage is output to the inverter of the normal traction machine; wherein the boosted battery voltage is lower than the inverter bus standby voltage value.

4. A multi-elevator parallel control device, implemented based on the multi-elevator parallel control method according to any one of claims 1 to 3, characterized in that: include: The first detection unit is used to detect whether the abnormal mains power time of the abnormal traction machine is greater than a first specified threshold when the mains power abnormality occurs in multiple traction machines; A cut-off and control unit, configured to cut off the external power supply when the first detection unit detects that the mains power abnormality time of the abnormal traction machine is greater than a first specified threshold, and control the DC-AC inverters to invert and output emergency power to the frequency converter of the abnormal traction machine one by one according to a specified sequence; The cut-off and control unit is further configured to, after the time for the DC-AC inverter to output the emergency power to the frequency converter of the last abnormal traction machine reaches a second specified threshold, cut off the emergency power output by the DC-AC inverter to the frequency converter of the last abnormal traction machine, and control the DC-AC inverter to invert and output the emergency power to the frequency converter of the next abnormal traction machine; The control and waiting unit is used to control the DC-AC inverter to shut down the working process and wait for an external call after the DC-AC inverter inverts and outputs the emergency power to each of the abnormal traction machines.

5. A control system, characterized in that: The control system includes: a memory storing executable program code; a processor coupled to the memory; The processor calls the executable program code stored in the memory to execute the multi-elevator parallel control method according to any one of claims 1 to 3.

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