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

Abstract

The invention relates to the technical field of elevators, and particularly discloses a multi-elevator parallel control method and system, and the method comprises the steps: cutting off external power supply when a plurality of traction machines are subjected to commercial power abnormity and the commercial power abnormity time of an abnormal traction machine is greater than a first specified threshold value, the DC-AC inverter is controlled to invert and output the emergency power supply to the frequency converter of the abnormal traction machine one by one according to a specified sequence; after the time for the DC-AC inverter to output the emergency power supply to the frequency converter of the previous abnormal traction machine reaches a second specified threshold value, the emergency power supply output by the DC-AC inverter to the frequency converter of the previous abnormal traction machine is cut off, and the DC-AC inverter is controlled to invert and output the emergency power supply to the frequency converter of the next abnormal traction machine; and when the DC-AC inverter inverts and outputs the emergency power supply to pass through each abnormal traction machine, controlling the DC-AC inverter to close the working process, and waiting for an external power supply. The multiple elevators can be controlled to enter the emergency mode according to the mains supply condition, so that safety is guaranteed.

Description

Technical Field

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

[0002] During the operation of the elevator, 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 may cause the elevator to stop in an emergency, trapping passengers in a closed car in a non-floor area.

[0003] At present, most elevators on the market are equipped with an emergency device to safely rescue people trapped in elevator failures, as shown in the invention patent application "An emergency automatic rescue device and method for people trapped in elevators" with Chinese patent publication number CN109678024A. However, it is found in practice that since most of the emergency devices are equipped with one per elevator, when the mains power is abnormal and multiple elevators need to be controlled simultaneously, multiple emergency devices are required to solve the problem, which greatly increases the cost of elevator emergency stop control. Summary of the invention

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

[0005] A first aspect of the present invention discloses a multi-elevator parallel control method, the method comprising:

[0006] When a plurality of traction machines have a mains power anomaly, 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 abnormal time of the mains power 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;

[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 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 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 implementation, 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 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.

[0012] As another optional implementation, in the first aspect of the present invention, the 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 supply 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] Detect whether the normal traction machine is operating in the power generation operation mode; if so, obtain the inverter bus voltage converted from the potential energy from the inverter of the normal traction machine, and output the inverter bus voltage to the 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, in the first aspect of the embodiment 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 operation 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 less than the inverter bus standby voltage value.

[0022] As another optional implementation, in the first aspect of the present invention, before detecting whether the mains power abnormality time of the abnormal traction machine is greater than a first specified threshold, the method further includes:

[0023] Detect whether the main switch controlling the mains power supply output is disconnected; if so, determine that the control system is currently in maintenance mode and issue a first prompt message;

[0024] 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;

[0025] Determine the traction machine with the power supply switch closed as the abnormal traction machine, and issue a second prompt message;

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

[0027] If it is detected that the phase sequence relay switch is not disconnected, it is detected whether there is a traction machine whose power switch is not closed; if so, it is determined that the traction machine whose power switch is not closed is currently in maintenance mode, and a third prompt message is issued.

[0028] As another optional embodiment, in the first aspect of the present invention, after the time for the DC-AC inverter to output the emergency power supply to the inverter of the last abnormal traction machine reaches a second specified threshold, and before the emergency power supply output by the DC-AC inverter to the inverter of the last abnormal traction machine is cut off, and before the DC-AC inverter is controlled to invert and output the emergency power supply to the inverter of the next abnormal traction machine, the method further includes:

[0029] Check whether there is a fault report currently; if so, issue a fault prompt message;

[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, the operation of the control instruction is executed.

[0032] As another optional implementation, in the first aspect of the present invention, the detecting whether a fault report currently occurs includes:

[0033] Check whether the contactor controlling the emergency power supply output has a sticking fault; if so, report the contactor sticking fault;

[0034] Detect whether the contactor operates according to the working logic table; if not, report the detection and execution system failure;

[0035] Detect whether the bidirectional DC power supply, the DC-AC inverter and the energy storage battery have fault information input; 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 value when the mains power abnormality occurs in multiple traction machines one by one;

[0038] A cut-off and control unit, used 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 inverter to invert and output emergency power to the frequency converter of the abnormal traction machine one by one according to the specified sequence;

[0039] The cut-off and control unit is further used to cut off the emergency power output by the DC-AC inverter to the inverter of the last abnormal traction machine 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 control the DC-AC inverter to invert and output the emergency power to the inverter 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, the 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 a 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. When the computer program product is run on a computer, the computer is enabled 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, wherein when the computer program product is run on a computer, the computer executes 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 the 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 the 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 drawings required for use in the embodiments will be briefly introduced below. 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 creative work.

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

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

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

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

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

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

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

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

[0059] The embodiment of the invention discloses a multi-elevator parallel control method, a control device and a control system, which can control the multi-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] Embodiment 1

[0062] See also Figure 1 , Figure 1 1 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 abnormal mains power supply, the control system detects whether the abnormal mains power supply 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 an embodiment of the present invention, a DC-AC inverter can be used to invert into single-phase 220Vac when a power outage or AC power abnormality occurs, and the inverter output can be achieved through the corresponding contactor circuit breaker. Subsequently, the live wire can be divided into two by controlling the action of the contactors corresponding to multiple traction machines to supply the elevator with 220Vac emergency power supply.

[0066] As an optional implementation, in an embodiment of the present invention, the DC-AC inverter is not limited to being inverted 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 limitations.

[0067] 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.

[0068] 103. After the time for the DC-AC inverter to output emergency power to the inverter of the last abnormal traction machine reaches a second specified threshold, the control system cuts off the emergency power output by the DC-AC inverter to the inverter of the last abnormal traction machine, and controls the DC-AC inverter to invert and output the emergency power to the inverter of the next abnormal traction machine.

[0069] 104. 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 waits for an external call to end this process.

[0070] 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 turn. For example, if elevators 1, 2, and 3 all need to be evacuated, the control system first determines whether the external phase loss or power outage exceeds 3S, cuts off the external power supply after exceeding 3S, and starts to supply elevator 1 for evacuation after 5S, that is, controls the DC-AC inverter to invert and output emergency power to elevator 1 for 120S and then cuts off the power supply, then the DC-AC inverter inverts and outputs emergency power to elevator 2 and keeps it for 120S before disconnecting, then the DC-AC inverter inverts and outputs emergency power to elevator 3 and keeps it for 120S before disconnecting, and finally the control system can delay the DC-AC inverter for another 8 seconds before shutting down the working process and waiting for an external call.

[0071] As an optional implementation, in the embodiment of the present invention, the control system will not enter evacuation again after completing an evacuation, unless the elevator enters a mode other than evacuation mode, that is, after the main power is restored, there is a power outage again, or the main switch of the 3 elevators is pulled or the main board is restarted. If one or two elevators are stopped by pulling the switch, the control system will skip this part when rescheduling evacuation, and only evacuate the online elevators.

[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, and after completing an evacuation, the emergency mode will not be entered again due to unchanged input logic, unless entering energy saving or maintenance mode or emergency stop and restart, the next evacuation can be performed.

[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 certain 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 a 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 a 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 main control board hardware and software of the control system is compatible with the situation where multiple elevators are running at the same time. For example, if there are 3 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.

[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 mainboard power supply 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 make any limitation), and 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 an embodiment of the present invention, the present application can be responsible for detecting the number of elevators actually in use, such as 1 elevator, 2 elevators, 3 elevators, and automatically controlling the corresponding energy-saving function to be put into use. The evacuation system also automatically identifies the elevators in use and evacuates in sequence.

[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 battery system and a DC-AC inverter are shared, 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 involves multiple elevators in parallel energy saving and power outage emergency function, 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 level the floor 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 can 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 described multi-elevator parallel control method can control the multi-elevators to enter the emergency mode according to the mains power situation to ensure safety.

[0088] In addition, implementation Figure 1 The described multi-elevator parallel control method 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 with installing an independent device on each elevator.

[0090] Embodiment 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, execute step 202; if not, execute step 203.

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

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

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

[0096] As an optional implementation, in the embodiment of the present invention, when the control system determines that the control system 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 light is turned on, and the corresponding fault information is reported through the Internet of Things board WeChat. The WeChat terminal can also remotely turn off the energy-saving function and emergency function. It can also be turned off when it is 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 the embodiment of the present invention, when the main switch is closed and the phase sequence relay switch is disconnected, the control system can determine that the mains power is abnormal at this time, and the traction machine with the power switch disconnected is in maintenance mode, and the traction machine with the power switch closed is in emergency evacuation mode, at which time DC-DC is turned off (EN is disconnected) and DC-AC is turned on (OFF / ON is closed). If there is power in the R phase, the control board is powered by an external power supply. If there is no power in the R phase, 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 the 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. At the same time, the touch screen displays the corresponding status.

[0102] As an optional implementation, in the embodiment of the present invention, when the control system controls the abnormal traction machines to evacuate one by one, the contactor status can be detected at the same time. If the corresponding contactor is disconnected when one elevator is evacuated, the control system can detect that the contactor has no adhesion fault; the control system can also detect whether the DC-DC, DC-AC, and energy storage battery have fault reports; if one or more faults are reported, the system fault light is turned on, and the corresponding fault information is reported through the Internet of Things board WeChat. The WeChat terminal can also remotely turn off the energy-saving function and emergency function.

[0103] 206. The control system detects whether there is a traction machine whose power switch is not closed. 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 the maintenance mode, and issues a third prompt message to end this process.

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

[0106] As an optional implementation, in the embodiment of the present invention, when the control system determines that the control system 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 light is turned on, and the corresponding fault information is reported through the Internet of Things board WeChat. The WeChat terminal can also remotely turn off the energy saving function and emergency function.

[0107] As an optional implementation, in an embodiment of the present invention, a main switch and a phase sequence relay switch for controlling the AC power supply output are provided in the present application, and a power supply switch is provided on each traction machine. The present 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 AC power is normal and a certain elevator is shut down, or the main switch is not pulled and the AC power is abnormal, and a certain 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 the embodiment of the present invention, the control system is designed with a watchdog device. When the control system crashes, it will automatically reset and can run uninterruptedly for 24 hours without supervision. When the DC-DC, DC-AC, battery, detection and execution system itself fails, the fault information can be sent to the mobile phone WeChat through the onboard 4G Internet of Things module to inform the fault device number, fault point, and device geographical location information. For the first use of WeChat, just scan the QR code to bind. Users can also use WeChat to remotely turn on or off the energy saving function and emergency function through the Internet of Things module.

[0109] 208. When multiple traction machines have abnormal mains power supply, the control system detects whether the abnormal mains power supply time of the abnormal traction machine is greater than the 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 occurs currently. If so, execute steps 211 to 213; if not, execute steps 214 to 215.

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

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

[0114] Check whether the contactor operates according to the working logic table; if not, report the detection and execution system failure;

[0115] Check whether the bidirectional DC power supply, DC-AC inverter and energy storage battery have any fault information input; if so, report the equipment fault.

[0116] 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".

[0117] 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".

[0118] 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 configuration) and report it through the Internet of Things board, and report it to the WeChat public account (number + fault type).

[0119] 211. The control system issues a fault prompt message.

[0120] As an optional implementation, in the 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.

[0121] As an optional implementation, in an embodiment of the present invention, the touch screen or light board in this application and the remote alarm and control function can help users to clearly understand the operating status of the elevator and what kind of fault it has encountered, as well as turn off the remote control function.

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

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

[0124] As an optional implementation, in the embodiment of the present invention, this application is compatible with the Internet of Things function. In addition to viewing the fault on the on-site display screen, users can also remotely view the control system faults via mobile phone (WeChat, SMS, phone): DC-DC fault, DC-AC fault, energy storage battery fault, detection and execution system fault; users can also remotely control: turn off the energy-saving function of a certain elevator, turn off the emergency function. Scan the touch screen or label QR code through WeChat to bind the device.

[0125] 214. The control system cuts off the emergency power supply outputted by the DC-AC inverter to the inverter of the last 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 an 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 the embodiment of the present invention, the control system will not enter evacuation again after completing an evacuation, unless the elevator enters a mode other than evacuation mode, that is, after the main power is restored, there is a power outage again, or the main switch of the 3 elevators is pulled or the main board is restarted. If one or two elevators are stopped by pulling the switch, the control system will skip this part when rescheduling evacuation, and only evacuate the online elevators.

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

[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 operation 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 inverter DC bus 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 a threshold value, the bidirectional DC-DC is used to step down the voltage and store energy in the energy storage battery. When the bus voltage is reduced to a threshold value in electric power generation, the bidirectional DC-DC is used to step up the voltage to the bus, thereby realizing electric energy replenishment, reducing the acquisition of city electricity, and saving electric energy.

[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 the embodiment of the present invention, the control system is designed with an onboard battery. When the external power is off, the onboard battery can be used to power the control system. When the mains power is restored to normal, the battery can be charged and kept in standby mode. The battery has a protection board to prevent overcharge and overdischarge, and can also achieve short circuit and overcurrent protection. When the battery is powered, the control system has a charge display, and the battery charge can be observed intuitively.

[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, 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 power outage causes the elevator to lose power, 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, and the modification is simple. After the modification, the elevator can immediately become more energy-saving and environmentally friendly, creating economic value for users while improving safety.

[0142] As an optional implementation, 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 current, 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 Figure 2-3 Another multi-elevator parallel control method described can control multiple elevators to enter an emergency mode according to the mains power situation to ensure safety.

[0144] In addition, implementation Figure 2-3 Another multi-elevator parallel control method described can store the electric energy in the power generation mode and release the electric energy in the motoring mode, thereby achieving energy saving effect.

[0145] Embodiment 3

[0146] See also Figure 4 , Figure 4 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 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.

[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 power supply 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 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 outputs the emergency power through 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 a power outage or AC power abnormality occurs, and the inverter output can be achieved through the corresponding contactor circuit breaker. Subsequently, the live wire can be divided into two by controlling the action of the contactors corresponding to multiple traction machines to supply the elevator with 220Vac emergency power supply.

[0152] As an optional implementation, in an embodiment of the present invention, the DC-AC inverter is not limited to being inverted 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 limitations.

[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 turn. 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, and cut off the external power supply after exceeding 3S. After 5S, it starts to supply elevator 1 for evacuation, that is, cut off and control unit 302 controls the DC-AC inverter to invert and output emergency power to elevator 1 for 120S and then cut off the power supply, and then the DC-AC inverter inverts and outputs emergency power to elevator 2 for 120S and then disconnects it, and then the DC-AC inverter inverts and outputs emergency power to elevator 3 for 120S and then disconnects 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 the embodiment of the present invention, the control system will not enter evacuation again after completing an evacuation, unless the elevator enters a mode other than evacuation mode, that is, after the main power is restored, there is a power outage again, or the main switch of the 3 elevators is pulled or the main board is restarted. If one or two elevators are stopped by pulling the switch, the control system will skip this part when rescheduling evacuation, and only evacuate the online elevators.

[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, and after completing an evacuation, the emergency mode will not be entered again due to unchanged input logic, unless entering energy saving or maintenance mode or emergency stop and restart, the next evacuation can be performed.

[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 certain 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 a 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 a 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 situation where multiple elevators are running at the same time. For example, if there are 3 elevators in use at this time, then the control system can support 1, 2, and 3 elevators all being put into 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 mainboard power supply 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 limitation). 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 an embodiment of the present invention, the present application can be responsible for detecting the number of elevators actually in use, such as 1 elevator, 2 elevators, 3 elevators, and automatically controlling the corresponding energy-saving function to be put into use. The evacuation system also automatically identifies the elevators in use and evacuates in sequence.

[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 battery system and a DC-AC inverter are shared, 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 parallel control of multiple elevators.

[0172] Embodiment 4

[0173] See also Figure 5 , Figure 5 1 is a schematic diagram of another structure of a 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 used to control the DC-AC inverter to shut down the working process after the control and waiting unit 303 controls the DC-AC inverter to wait for an external call, and then detect whether an evacuation instruction is triggered.

[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 the embodiment of the present invention, the control system will not enter evacuation again after completing an evacuation, unless the elevator enters a mode other than evacuation mode, that is, after the main power is restored, there is a power outage again, or the main switch of the 3 elevators is pulled or the main board is restarted. If one or two elevators are stopped by pulling the switch, the control system will skip this part when rescheduling evacuation, and only evacuate the online elevators.

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

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

[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, used to detect whether the main switch for controlling the mains power supply output is disconnected and restarted;

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

[0182] The trigger subunit 3042 is used to trigger an evacuation command when the first detection 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 acquire 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 value, 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 value and is stepped up to the bus through the bidirectional DC-DC, thereby realizing electric energy replenishment, reducing the acquisition of mains electricity, and saving electric energy.

[0190] As an optional implementation, in the embodiment of the present invention, the control system is designed with an onboard battery. When the external power is off, the onboard battery can be used to power the control system. When the mains power is restored to normal, the battery can be charged and kept in standby mode. The battery has a protection board to prevent overcharge and overdischarge, and can also achieve short circuit and overcurrent protection. When the battery is powered, the control system has a charge display, and the battery charge can be observed intuitively.

[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 the embodiment of the present invention, the third detection unit 306 is also used 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, 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 when it is lightly loaded, thereby reducing accidents of people being trapped; when the mains power is normal and under the energy saving function, it can automatically determine whether the elevator is running electrically or generating electricity, and provide feedback and energy storage; if the elevator loses power due to power outages during maintenance, it enters the maintenance mode without emergency inversion.

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

[0198] As an optional implementation, 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 current, is not afraid of damage caused by 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 used to detect whether the main switch controlling the mains power supply output is disconnected before the first detection unit 301 detects whether the mains power abnormality time of the abnormal traction machine is greater than the first specified threshold.

[0201] The judging and prompting unit 311 is used 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 process of maintenance, the mains power call will not automatically power on to ensure safety.

[0203] As an optional implementation, in the embodiment of the present invention, when the fourth detection unit 310 detects that the main switch is disconnected, it is not necessary to determine the power switch status and phase sequence relay switch status of each traction machine. At this time, the main switch of the machine room is closed, and the maintenance mode is entered. The touch screen displays the maintenance mode. At this time, the DC-DC is turned off (disconnected) and the DC-AC is turned off (disconnected). All elevators are powered off. 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.

[0204] As an optional implementation, in the embodiment of the present invention, when the control system determines that the control system is currently in maintenance mode, the fourth detection unit 310 can also 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 light is turned on, and the corresponding fault information is reported through the Internet of Things board WeChat. The WeChat terminal can also remotely turn off the energy saving function and emergency function.

[0205] As an optional implementation, in the 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 used to judge that the current mains power is abnormal when the fourth detecting unit 310 detects that the phase sequence relay switch is disconnected.

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

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

[0209] As an optional implementation, in the embodiment of the present invention, when the main switch is closed and the phase sequence relay switch is disconnected, the control system can determine that the mains power is abnormal at this time, and the traction machine with the power switch disconnected is in maintenance mode, and the traction machine with the power switch closed is in emergency evacuation mode, at which time DC-DC is turned off (EN is disconnected) and DC-AC is turned on (OFF / ON is closed). If there is power in the R phase, the control board is powered by an external power supply. If there is no power in the R phase, 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 the 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. At the same time, the touch screen displays the corresponding status.

[0211] As an optional implementation, in the embodiment of the present invention, when the control system controls the abnormal traction machines to evacuate one by one, the contactor status can be detected at the same time. If the corresponding contactor is disconnected when one elevator is evacuated, the control system can detect that the contactor has no adhesion fault; the control system can also detect whether the DC-DC, DC-AC, and energy storage battery have fault reports; if one or more faults are reported, the system fault light is turned on, and the corresponding fault information is reported through the Internet of Things board WeChat. The WeChat terminal can also remotely turn off the energy-saving function and emergency function.

[0212] As an optional implementation, in the embodiment of the present invention, the fourth detection unit 310 is also used to detect whether there is a traction machine whose power switch is not closed 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 judge that the traction machine with the power switch not closed is currently in maintenance mode when the fourth detection unit 310 detects that there is a traction machine with the power switch not closed, and issue a third prompt message.

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

[0215] As an optional implementation, in the embodiment of the present invention, when the control system determines that the control system 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 light is turned on, and the corresponding fault information is reported through the Internet of Things board WeChat. The WeChat terminal can also remotely turn off the energy saving function and emergency function.

[0216] As an optional implementation, in an embodiment of the present invention, a main switch and a phase sequence relay switch for controlling the AC power supply output are provided in the present application, and a power supply switch is provided on each traction machine. The present 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 AC power is normal and a certain elevator is shut down, or the main switch is not pulled and the AC power is abnormal, and a certain 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 the embodiment of the present invention, the control system is designed with a watchdog device. When the control system crashes, it will automatically reset and can run uninterruptedly for 24 hours without supervision. When the DC-DC, DC-AC, battery, detection and execution system itself fails, the fault information can be sent to the mobile phone WeChat through the onboard 4G Internet of Things module to inform the fault device number, fault point, and device geographical location information. For the first use of WeChat, just scan the QR code to bind. Users can also use WeChat to remotely turn on or off the energy saving function and emergency function through the Internet of Things 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 to detect whether a fault report occurs currently after the time for the DC-AC inverter to output emergency power to the inverter of the previous abnormal traction machine reaches a second specified threshold, and before cutting off the emergency power output from the DC-AC inverter to the inverter of the previous abnormal traction machine, and controlling the DC-AC inverter to invert and output emergency power to the inverter of the next abnormal traction machine.

[0220] The prompt unit 316 is used to issue a fault prompt message when the fifth detection unit 315 detects that a fault report is currently occurring.

[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 used to execute the operation of the control instruction when receiving the control instruction.

[0223] As an optional implementation, in the embodiment of the present invention, this application is compatible with the Internet of Things function. In addition to viewing the fault on the on-site display screen, users can also remotely view the control system faults via mobile phone (WeChat, SMS, phone): DC-DC fault, DC-AC fault, energy storage battery fault, detection and execution system fault; users can also remotely control: turn off the energy-saving function of a certain elevator, turn off the emergency function. Scan the touch screen or label QR code through WeChat to bind the device.

[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 controlling the emergency power output has a sticking fault.

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

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

[0228] As an optional implementation, in the embodiment of the present invention, the reporting subunit 3152 is also used to report the 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 the embodiment of the present invention, the second detection subunit 3151 is also used 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 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 the 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 in this application and the remote alarm and control function can help users to clearly understand the operating status of the elevator and what kind of fault it has encountered, as well as 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 an emergency mode according to the mains power situation to ensure safety.

[0237] In addition, implementation Figure 5 Another multi-elevator parallel control device described can store the electric energy in the power generation mode and release the electric energy in the motoring mode, thereby achieving energy saving effect.

[0238] Embodiment 5

[0239] See also Figure 6 , Figure 6 It is a structural schematic 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 codes;

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

[0243] The processor 502 calls the executable program code stored in the memory 501 to execute Figure 1-2 Any method for controlling multiple elevators in parallel.

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

[0245] The embodiment of the present invention also discloses a computer program product, wherein when the computer program product is run on a computer, the computer executes Figure 1-2 Any method for controlling multiple elevators in parallel.

[0246] Those skilled in the art can understand 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, and the storage medium includes 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 rewritable read-only memory (EEPROM), a compact disc (CD-ROM) or other optical disc storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

[0247] A multi-elevator parallel control method and control system disclosed in an embodiment of the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content 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 plurality of traction machines have a mains power anomaly, 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 abnormal time of the mains power 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 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 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.

2. The method according to claim 1, characterized in that 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 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.

3. The method according to claim 2, characterized in that The detecting whether an evacuation instruction 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 supply output is disconnected and restarted; if so, triggering the evacuation command; And / or, detect whether the control mainboard of the abnormal traction machine is disconnected and restarted; if so, trigger the evacuation command.

4. The method according to any one of claims 1 to 3, characterized in that: The method further comprises: Detect whether the normal traction machine is operating in the power generation operation mode; if so, obtain the inverter bus voltage converted from the potential energy from the inverter of the normal traction machine, and output the inverter bus voltage to the 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.

5. The method according to claim 4, characterized in that The method further comprises: If it is detected that the normal traction machine is not operating in the power generation operation 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 less than the inverter bus standby voltage value.

6. The method according to claim 1, characterized in that Before detecting whether the abnormal time of the mains power of the abnormal traction machine is greater than a first specified threshold, the method further comprises: Detect whether the main switch controlling the mains power supply output is disconnected; if so, determine that the control system is currently in maintenance mode and issue 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; Determine the traction machine with the power supply switch closed as the abnormal traction machine, and issue a second prompt message; Executing the operation of detecting whether the abnormal time of the mains power 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, it is detected whether there is a traction machine whose power switch is not closed; if so, it is determined that the traction machine whose power switch is not closed is currently in maintenance mode, and a third prompt message is issued.

7. The method according to claim 6, characterized in that 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 before 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; When the control instruction is received, the operation of the control instruction is executed.

8. The method according to claim 7, characterized in that The detecting whether a fault report is currently occurring includes: Check whether the contactor controlling 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 fault information input; if so, report the equipment fault.

9. A multi-elevator parallel control device, characterized in that: include: A 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, used 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 inverter to invert and output emergency power to the frequency converter of the abnormal traction machine one by one according to the specified sequence; The cut-off and control unit is further used to cut off the emergency power output by the DC-AC inverter to the inverter of the last abnormal traction machine 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 control the DC-AC inverter to invert and output the emergency power to the inverter 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.

10. A control system, characterized in that: The control system comprises: 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 8.

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