Elevator energy saving control method and control device based on direct current elevator

Abstract

The application relates to the technical field of elevator energy-saving control, and particularly discloses an elevator energy-saving control method and control device based on a direct-current elevator, wherein the direct-current elevator comprises a direct-current frequency converter and a master control cabinet; the method comprises the following steps: obtaining feedback energy, and supplying power to the direct-current frequency converter based on the feedback energy and an external power supply; judging whether the direct-current elevator meets a preset resting state; if yes, controlling the master control cabinet to enter a low-power-consumption mode; in response to an external call signal, controlling the master control cabinet to exit the low-power-consumption mode; performing energy-saving analysis on an elevator car, generating an energy-saving control scheme, and performing energy-saving control operation on the elevator car based on the energy-saving control scheme. The main energy consumption in the elevator system during the operation of the elevator is analyzed, and corresponding energy-saving measures are taken, so that the energy consumption of the elevator system is effectively reduced, and the energy-saving requirement is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of elevator energy-saving control, in particular to an elevator energy-saving control method based on a DC elevator and an elevator energy-saving control device based on a DC elevator. BACKGROUND

[0002] With the rapid development of economy and the acceleration of urbanization, high-rise buildings have sprung up like mushrooms, and elevators, as an indispensable vertical transportation tool in modern buildings, have become increasingly important. However, the high energy consumption of elevators during operation has gradually attracted widespread attention from all sectors of society.

[0003] According to statistics, the energy consumption of elevators accounts for nearly 20% of the total building energy consumption, especially in some large commercial buildings and high-rise residences, the energy consumption of elevators accounts for a considerable part. Therefore, how to reduce the energy consumption of elevators and improve the energy utilization efficiency has become an important issue to be solved in the current elevator industry.

[0004] In the traditional elevator system, on the one hand, because it needs to drive a heavy elevator car and provide power for various elevator components, its power consumption is large and the use cost is high; on the other hand, with the increasing demand of people for the use of elevators, such as the demand for adding air conditioners in the car and the demand for adding advertising machines in the car, the energy consumption of the elevator is further increased, which further increases the operation cost of the property and causes trouble to the property. SUMMARY

[0005] In order to overcome the above technical problems existing in the prior art, the embodiments of the present application provide an elevator energy-saving control method and device based on a DC elevator, by analyzing the main energy consumption in the elevator system during the operation of the elevator, and taking corresponding energy-saving measures, the energy consumption of the elevator system is effectively reduced to meet the energy-saving demand.

[0006] In order to achieve the above purpose, the embodiments of the present application provide an elevator energy-saving control method based on a DC elevator, the DC elevator comprising a DC frequency converter and a master control cabinet, the method comprising: obtaining a feedback energy, and supplying power to the DC frequency converter based on the feedback energy and an external power supply; determining whether the DC elevator meets a preset resting state; if yes, controlling the master control cabinet to enter a low-power consumption mode; in response to an external call signal, controlling the master control cabinet to exit the low-power consumption mode; performing energy-saving analysis on the elevator car to generate an energy-saving control scheme; and performing energy-saving control operation on the elevator car based on the energy-saving control scheme.

[0007] Preferably, the direct-current frequency converter comprises an energy storage device, and the power supply to the direct-current frequency converter based on the feedback energy and the external power supply comprises: storing the feedback energy by the energy storage device; and supplying power to the direct-current frequency converter based on the energy storage device and the external power supply.

[0008] Preferably, the determining whether the direct-current elevator meets the preset resting state comprises: determining a stopping time threshold; determining whether the stopping time of the direct-current elevator reaches the stopping time threshold; and if so, determining that the direct-current elevator meets the preset resting state.

[0009] Preferably, the determining the stopping time threshold comprises: obtaining historical running data of the direct-current elevator; extracting historical stopping data of the direct-current elevator in a day based on the historical running data; performing clustering processing on the historical stopping data to obtain clustered stopping data; determining a plurality of stopping times in a day for the clustered stopping data; obtaining a preset adjustment factor; and determining a plurality of corresponding stopping time thresholds based on the preset adjustment factor and the plurality of stopping times, the stopping time threshold being inversely proportional to the corresponding stopping time.

[0010] Preferably, the energy-saving analysis of the elevator car and the generation of an energy-saving control scheme comprises: obtaining the running state of the elevator car; if the running state is a stopping state: controlling the lighting device of the elevator car to be turned off, and controlling the display device in the elevator car to switch to a black screen mode; obtaining the internal temperature in the elevator car and the external temperature of the landing; and controlling the temperature adjusting device of the elevator car to perform corresponding temperature control operations based on the internal temperature and the external temperature.

[0011] Preferably, the controlling the temperature adjusting device of the elevator car to perform corresponding temperature control operations based on the internal temperature and the external temperature comprises: obtaining the space size of the elevator car and the size of the car door of the elevator car; determining a temperature difference based on the internal temperature and the external temperature; determining a temperature change curve in the elevator car in an open door state based on the space size, the size of the car door, and the temperature difference; and controlling the temperature adjusting device to perform corresponding temperature control operations based on the temperature change curve and a set temperature value.

[0012] Preferably, the controlling the temperature adjusting device to perform corresponding temperature control operations based on the temperature change curve and a set temperature value comprises: obtaining the load information of the elevator car; estimating the number of passengers in the elevator car based on the load information; estimating a corresponding heat dissipation amount based on the number of passengers; and performing corresponding temperature control operations based on the temperature change curve, the heat dissipation amount, and the set temperature value.

[0013] Preferably, the corresponding temperature control operation is performed based on the temperature change curve, the heat dissipation amount and the set temperature value, including: determining a temperature control power based on the temperature change curve, the heat dissipation amount and the set temperature value; determining a temperature control time based on the temperature difference and the temperature control power; obtaining a time to station of the elevator car; and performing a corresponding temperature control operation based on the temperature control power, the temperature control time and the time to station.

[0014] Preferably, the method further includes: determining a stop temperature control time based on the temperature control time; determining whether the stop temperature control time is later than the time to station; if yes, obtaining a time deviation between the stop temperature control time and the time to station; adjusting the temperature control power based on the time deviation to obtain an adjusted power; and performing a corresponding temperature control operation based on the adjusted power and the time to station.

[0015] Correspondingly, the application also provides a DC elevator-based elevator energy-saving control device, which includes: a feedback unit configured to obtain a feedback energy and supply power to the DC frequency converter based on the feedback energy and an external power source; a low-power consumption control unit configured to determine whether the DC elevator meets a preset resting state; in the case that the DC elevator meets the preset resting state, control the main control cabinet to enter a low-power consumption mode; in response to an external call signal, control the main control cabinet to exit the low-power consumption mode; and a car energy-saving control unit configured to perform energy-saving analysis on an elevator car to generate an energy-saving control scheme and perform energy-saving control operation on the elevator car based on the energy-saving control scheme.

[0016] Through the technical solutions provided by the application, the application has at least the following technical effects:

[0017] By analyzing the energy consumption in the elevator system, the main energy consumption points are determined, and targeted energy-saving control is taken from the aspects of elevator drive, main control cabinet and elevator car respectively. On the basis of not changing the existing elevator control experience, the best energy-saving effect is achieved, and the user's elevator experience is effectively improved, meeting the actual demand.

[0018] Other features and advantages of the embodiments of the application will be described in detail in the following specific implementation part. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are included to provide a further understanding of the embodiments of the application, and constitute a part of the specification, and are used together with the following specific implementation to explain the embodiments of the application, but do not constitute a limitation on the embodiments of the application. In the drawings:

[0020] Figure 1 is a structure schematic diagram of the DC elevator-based elevator energy-saving control device provided by the embodiments of the application. DETAILED DESCRIPTION

[0021] The specific embodiments of the present application will be described in detail below with reference to the drawings. It should be understood that the specific embodiments described herein are merely illustrative and explanatory and are not intended to limit the present application.

[0022] The terms "system" and "network" in the embodiments of the present application can be used interchangeably. "Multiple" means two or more, and therefore "multiple" can also be understood as "at least two" in the embodiments of the present application. "And / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / ", if not specially stated, generally represents an "or" relationship between the front and rear associated objects. In addition, it should be understood that in the description of the embodiments of the present application, the terms "first", "second", etc. are only used for distinguishing purposes of description and cannot be understood as indicating or implying relative importance or indicating or implying order.

[0023] The embodiments of the present application provide an elevator energy-saving control method based on a direct-current elevator, the direct-current elevator comprising a direct-current frequency converter and a master control cabinet, the method comprising: obtaining a feedback energy, and supplying power to the direct-current frequency converter based on the feedback energy and an external power supply; determining whether the direct-current elevator meets a preset resting state; if yes, controlling the master control cabinet to enter a low-power consumption mode; in response to an external call signal, controlling the master control cabinet to exit the low-power consumption mode; performing energy-saving analysis on an elevator car to generate an energy-saving control scheme; and performing energy-saving control operation on the elevator car based on the energy-saving control scheme.

[0024] In a possible implementation, after analyzing the actual operation energy consumption of the elevator, energy-saving control is performed on the elevator from several main aspects of high energy consumption. Specifically, in the embodiments of the present application, a direct-current elevator based on a direct-current frequency converter and a direct-current traction machine is adopted. During the operation of the elevator, first, the feedback energy of the elevator is obtained, the feedback energy being direct-current feedback power. The feedback energy is input into the direct-current frequency converter for power supply, so that the direct-current frequency converter is powered by the external power supply and the feedback energy at the same time, thereby reducing the operation cost of the elevator.

[0025] However, in actual application, the technicians find that the driving of the elevator traction machine and the occurrence time of the feedback energy are contradictory, that is, when the driving of the elevator traction machine needs to consume power, the feedback energy will not be generated; when the feedback energy is generated, the elevator traction machine does not need to consume power for driving. Therefore, the feedback energy is directly consumed by a consumption resistor in the conventional elevator, thereby causing energy waste.

[0026] In the embodiment of the present application, the DC frequency converter comprises an energy storage device, and the DC frequency converter is powered based on the feedback energy and the external power supply, comprising: storing the feedback energy by the energy storage device; and powering the DC frequency converter based on the energy storage device and the external power supply.

[0027] In a possible implementation, by configuring an additional energy storage device, such as a lithium battery or a large-capacity energy storage battery, for the DC frequency converter, when the feedback energy is generated, the feedback energy is input to the energy storage device for storage, and when the elevator hoisting machine needs power for driving, the DC frequency converter is powered by the energy storage device and the external power supply at the same time, so as to reduce energy consumption.

[0028] In the second aspect, the running state of the elevator is monitored in real time, and it is determined whether the DC elevator meets the preset resting state.

[0029] In the embodiment of the present application, the determination of whether the DC elevator meets the preset resting state comprises: determining a stopping time threshold; determining whether the stopping time of the DC elevator reaches the stopping time threshold; and if so, determining that the DC elevator meets the preset resting state.

[0030] In a possible implementation, the stopping time threshold is first obtained, for example, the stopping time threshold is fixedly set to 5 min. However, in actual application, the use frequency of the elevator is different at different times of a day, for example, the use frequency is higher in the daytime, so if the stopping time threshold is set to 1 min, the frequent mode switching of the master control cabinet may be caused, which may cause damage to the electrical components of the elevator; and the use frequency is lower at night, so if the stopping time threshold is set to 5 min, more invalid standby is caused, and there is a certain energy waste.

[0031] In order to solve the above technical problems, in the embodiment of the present application, the determination of the stopping time threshold comprises: obtaining historical running data of the DC elevator; extracting historical stopping data of the DC elevator in a day based on the historical running data; performing clustering processing on the historical stopping data to obtain clustered stopping data; determining a plurality of stopping times in a day for the clustered stopping data; obtaining a preset adjustment factor, and determining a plurality of corresponding stopping time thresholds based on the preset adjustment factor and the plurality of stopping times.

[0032] In a possible implementation, historical operation data of the direct-current elevator is acquired, and historical stop data in a day is extracted from the data, including but not limited to stop time points, stop time lengths, and the like. Since the use of the elevator is different for different people and at different times, the stop data of the elevator also has great differences. In order to analyze the regularity of the stop data of the elevator, clustering processing is performed on the historical stop data to obtain clustered stop data. According to the clustered stop data, multiple stop times in a day can be determined, each of which is a stop time of the elevator at a different time period. On this basis, the skilled person in the art can also perform similar merging processing on the multiple stop times to minimize the number of different stop times and reduce the complexity of subsequent monitoring and analysis. At this time, a preset adjustment factor is acquired, which is an adjustment factor determined according to an acceptable stop time fluctuation range and a reverse adjustment amplitude according to experience of the skilled person.

[0033] In the embodiment of the application, if the stop time of the elevator in a time period is relatively long (for example, at night), it is considered to have a large hibernation value, so after monitoring that there is a short-time stop, the main control cabinet can be controlled to enter the hibernation mode to maximize the reduction of energy consumption. Conversely, if the stop time of the elevator in a time period is relatively short (for example, during the peak period of going to and from work), it is considered to have a small hibernation value, so after monitoring that there is a long-time stop, the main control cabinet is controlled to enter the hibernation mode to avoid frequent mode switching from causing damage to electrical components of the elevator. At this time, after adjusting each stop time according to the preset adjustment factor, multiple stop time thresholds inversely proportional to the corresponding stop times are obtained.

[0034] In the embodiment of the application, by dynamically determining and adjusting the stop time threshold according to the actual operation data of the elevator, the elevator can adaptively adjust the corresponding stop time threshold according to the current busy degree of the elevator and automatically enter the hibernation mode, thereby maximizing the reduction of energy consumption of the main control cabinet of the elevator during use and improving the economic efficiency of the elevator.

[0035] In the embodiment of the application, after the main control cabinet enters the low-power mode, all electrical components except the safety components and the main control board are powered off, and the main control board also enters the low-power mode and only allows necessary programs to run while listening to the calling signal of the external call. For example, at a certain moment, the external call signal is monitored, and the main control cabinet is immediately controlled to exit the low-power mode to realize the normal operation of the elevator.

[0036] In the third aspect, since there are also many power-consuming components in the elevator car, such as the internal call display screen, the advertisement display screen, the car air conditioner, etc., the energy-saving analysis is also performed on the elevator car, and the corresponding energy-saving control scheme is generated. In the embodiment of the present application, the energy-saving analysis on the elevator car and the generation of the energy-saving control scheme comprises: obtaining the running state of the elevator car; if the running state is the stopping state: controlling the lighting device of the elevator car to be turned off, and controlling the display device in the elevator car to be switched to the black screen mode; obtaining the internal temperature in the elevator car, and obtaining the external temperature of the landing, and controlling the temperature adjusting device of the elevator car to perform the corresponding temperature control operation based on the internal temperature and the external temperature.

[0037] In a possible implementation, firstly, the running state of the elevator car is obtained, which includes but is not limited to the carrying state, the door opening state and the stopping state. If the current elevator car is in the stopping state, it can be determined that the passengers in the elevator car temporarily do not need to use the related services, and therefore the corresponding energy-saving control can be performed on the related devices or electrical components in the elevator car. Specifically, in one aspect, the lighting device of the elevator car is controlled to be turned off to reduce the energy consumption; in the second aspect, since the display device needs a certain time (several seconds to 1 minute) to start, if the display device is frequently controlled to restart, it will cause the trouble to the users entering the elevator, and therefore in the embodiment of the present application, the display device in the elevator car is controlled to be switched to the black screen mode, so as to realize the energy saving on the basis of avoiding the trouble to the users.

[0038] In the third aspect, the internal temperature in the elevator car is obtained, and the external temperature of the landing is obtained, and the temperature adjusting device (such as the car air conditioner) in the elevator car is controlled to perform the corresponding temperature control operation according to the internal temperature and the external temperature.

[0039] In the embodiment of the present application, the control of the temperature adjusting device of the elevator car to perform the corresponding temperature control operation based on the internal temperature and the external temperature comprises: obtaining the space size in the elevator car, and obtaining the size of the car door of the elevator car; determining the temperature difference based on the internal temperature and the external temperature; determining the temperature change curve in the elevator car in the door opening state based on the space size, the size of the car door and the temperature difference; and controlling the temperature adjusting device to perform the corresponding temperature control operation based on the temperature change curve and the set temperature value.

[0040] In a possible implementation, the size of the space in the elevator car and the size of the car door of the elevator car are acquired, the size of the space determines the refrigeration efficiency of the car air conditioner, and the size of the car door determines the heat exchange efficiency between the car and the external landing when the elevator door is opened. At this time, the temperature difference is determined according to the internal temperature and the external temperature, and the size of the temperature difference also affects the heat exchange efficiency. At this time, the temperature change curve in the elevator car in the opened door state is determined according to the size of the space, the size of the car door, and the temperature difference. At this time, the car air conditioner controls the corresponding temperature control operation according to the temperature change curve and the set temperature value, for example, the corresponding temperature control operation is performed according to the temperature control efficiency of the car air conditioner combined with the above parameters.

[0041] For example, in a certain refrigeration scene, the refrigeration efficiency of the car air conditioner is determined according to the cold air speed and the temperature difference between the cold air temperature and the internal temperature of the car air conditioner, and then the instruction control strategy of the car air conditioner is determined combined with the temperature change curve and the set temperature value, and the corresponding temperature control operation is performed according to the refrigeration control strategy.

[0042] In the embodiment of the present application, compared with the conventional scheme of using fixed temperature control power to perform temperature control operation of the elevator car, intelligent temperature control strategy is adopted according to the actual temperature condition in the elevator car, so as to reduce energy consumption on the basis of meeting the user's expected temperature control effect, and the actual needs of the user are met.

[0043] In actual application process, since the elevator needs to carry people or animals to go up and down, and people or animals also release energy or absorb energy, if the influence of people or animals on the temperature in the elevator car is not considered, the temperature control operation will deviate.

[0044] In the embodiment of the present application, the corresponding temperature control operation is performed based on the temperature change curve and the set temperature value, including: acquiring the load information of the elevator car; estimating the number of passengers in the elevator car based on the load information; estimating the corresponding heat dissipation amount based on the number of passengers; and performing the corresponding temperature control operation based on the temperature change curve, the heat dissipation amount, and the set temperature value.

[0045] In a possible implementation, the load information of the elevator car is acquired, the number of passengers in the elevator car is estimated according to the load information, and the corresponding heat dissipation amount is estimated according to the number of passengers, for example, the estimated number of passengers is converted into the corresponding heat dissipation amount in the manner of a standard adult, and finally the temperature control strategy of the car air conditioner is determined according to the temperature change curve, the heat dissipation amount, and the set temperature value, and the corresponding temperature control operation is performed.

[0046] In this embodiment of the invention, the temperature control strategy inside the elevator car is further optimized by combining the heat dissipation of passengers inside the elevator car, so as to further improve the accuracy of temperature control operation, reduce energy consumption, effectively improve user experience, and meet the actual needs of users.

[0047] In practical applications, technicians have found that the temperature control scenarios inside the elevator car and indoors are different. Passengers in the elevator car only stay and pass through for a short time. Therefore, the elevator car only needs to ensure a sufficient user experience while they are in the elevator car, and it is not necessary to keep the car air conditioner running at full power continuously. Moreover, users are not particularly sensitive to temperature. Therefore, energy can be further saved by stopping operation in advance.

[0048] In this embodiment of the invention, the step of performing a corresponding temperature control operation based on the temperature change curve, the heat dissipation, and the set temperature value includes: determining the temperature control power based on the temperature change curve, the heat dissipation, and the set temperature value; determining the temperature control time based on the temperature difference and the temperature control power; obtaining the arrival time of the elevator car; and performing a corresponding temperature control operation based on the temperature control power, the temperature control time, and the arrival time.

[0049] In one possible implementation, the temperature control power is determined based on the temperature change curve, heat dissipation, and a set temperature value. Based on this power and temperature difference, the required temperature control time for a predetermined operation can be determined. Then, the elevator car's arrival time is obtained, and the corresponding temperature control operation is executed based on the power, time, and arrival time. Specifically, based on the time and arrival time, it can be determined whether the car temperature can be maintained within the desired range before the passenger arrives. If so, the temperature control power and a pre-set temperature fluctuation range are combined to control the car's air conditioning to stop operating before the passenger arrives. For passengers in the car, this ensures a certain level of comfort without noticeable temperature changes, while also reducing energy consumption during elevator operation, achieving better energy-saving results.

[0050] Furthermore, during application, there may be instances where the temperature control efficiency inside the car is too low, resulting in the temperature not being controlled within a reasonable range even after passengers have left the car, thereby reducing the user experience.

[0051] In this embodiment of the invention, the method further includes: determining a stop temperature control time based on the temperature control time; determining whether the stop temperature control time is later than the arrival time; if so, obtaining the time deviation between the stop temperature control time and the arrival time; adjusting the temperature control power based on the time deviation to obtain the adjusted power; and performing a corresponding temperature control operation based on the adjusted power and the arrival time.

[0052] In a possible implementation, the stopping temperature control time is determined according to the predicted temperature control time, and is compared with the arrival time of the current passenger, if the stopping temperature control time is later than the arrival time, it is determined that the temperature control power needs to be adjusted. Specifically, a time deviation between the two times is obtained, and the temperature control power is adjusted according to the time deviation to obtain an adjusted power, and finally the corresponding temperature control operation is performed according to the adjusted power and the arrival time.

[0053] In the embodiment of the present application, the temperature control power is intelligently adjusted by combining the actual temperature control effect in the car, so that the best energy saving effect is realized on the basis of meeting the user's sufficient elevator experience, and the balance between user experience and energy saving is effectively realized, and the actual demand is met.

[0054] Please refer to Figure 1 , based on the same inventive concept, the embodiment of the present application provides an elevator energy saving control device based on direct current elevator, the device comprises: a feedback unit for obtaining feedback energy, and the direct current frequency converter is powered based on the feedback energy and external power supply; a low-power control unit for judging whether the direct current elevator meets a preset rest state; in the case that the direct current elevator meets the preset rest state, the main control cabinet is controlled to enter a low-power mode; in response to an external call signal, the main control cabinet is controlled to exit the low-power mode; a car energy saving control unit for energy saving analysis of the elevator car, generating an energy saving control scheme; based on the energy saving control scheme, the energy saving control operation for the elevator car is performed.

[0055] The above describes the optional implementation of the embodiment of the present application in detail in combination with the drawings, but the embodiment of the present application is not limited to the specific details in the above implementation, and various simple modifications can be made to the technical scheme of the embodiment of the present application within the technical concept range of the embodiment of the present application, and these simple modifications all belong to the protection range of the embodiment of the present application.

[0056] In addition, it should be noted that each specific technical feature described in the above specific implementation can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combination manners are not described again in the embodiment of the present application.

[0057] Those skilled in the art can understand that all or part of the steps of the method in the above-mentioned embodiments can be completed by programs instructing the relevant hardware, the programs are stored in a storage medium, and the programs include a plurality of instructions for enabling a single-chip microcomputer, a chip or a processor to execute all or part of the steps of the method described in various embodiments of the present application. The foregoing storage medium includes a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk and various storage media capable of storing program codes.

[0058] In addition, various different embodiments of the embodiments of the present application can also be combined arbitrarily, as long as they do not deviate from the idea of the embodiments of the present application, and they should also be considered as disclosed in the embodiments of the present application.

Claims

1. A DC elevator-based elevator energy-saving control method, the DC elevator including a DC inverter and a master control cabinet, characterized by, The method includes: Obtain feedback energy, and power the DC inverter based on the feedback energy and an external power source; Determine whether the DC elevator meets the preset rest state; If so, control the main control cabinet to enter low power mode; In response to an external call signal, the main control cabinet is controlled to exit the low-power mode; Perform energy-saving analysis on the elevator car and generate an energy-saving control scheme; Based on the energy-saving control scheme, energy-saving control operations are performed on the elevator car; This includes conducting energy-saving analysis on the elevator car and generating energy-saving control schemes, including: The internal temperature inside the elevator car and the external temperature of the landing are obtained. Based on the internal temperature and the external temperature, the temperature regulating device of the elevator car is controlled to perform corresponding temperature control operations; Based on the internal temperature and the external temperature, the temperature regulating device of the elevator car is controlled to perform corresponding temperature control operations, including: Obtain the size of the space inside the elevator car and the size of the elevator car door; The temperature difference is determined based on the internal temperature and the external temperature; Based on the space size, the car door size, and the temperature difference, the temperature change curve inside the elevator car is determined when the door is open. Obtain the load information of the elevator car; The number of passengers in the elevator car is estimated based on the load information. Estimate the corresponding heat dissipation based on the number of elevator passengers; The temperature control power is determined based on the temperature change curve, the heat dissipation, and the set temperature value. The temperature control time is determined based on the temperature difference and the temperature control power. Obtain the arrival time of the elevator car; The corresponding temperature control operation is performed based on the temperature control power, the temperature control time, and the arrival time.

2. The method of claim 1, wherein, The DC inverter includes an energy storage device, and the power supply to the DC inverter based on the feedback energy and the external power source includes: The feedback energy is stored through the energy storage device; The DC inverter is powered by the energy storage device and the external power source.

3. The method of claim 1, wherein, The step of determining whether the DC elevator meets the preset rest state includes: Determine the docking time threshold; Determine whether the stopping time of the DC elevator reaches the stopping time threshold; If so, determine that the DC elevator meets the preset rest state.

4. The method of claim 3, wherein, The determination of the docking time threshold includes: Obtain the historical operating data of the DC elevator; Based on the historical operating data, extract the historical stop data of the DC elevator within one day; Clustering is performed on the historical docking data to obtain clustered docking data; The clustered docking data is used to determine multiple docking times within a day; A preset adjustment factor is obtained, and multiple corresponding docking time thresholds are determined based on the preset adjustment factor and the multiple docking times. The docking time thresholds are inversely proportional to the corresponding docking times.

5. The method of claim 1, wherein, The energy-saving analysis of the elevator car and the generation of an energy-saving control scheme also include: Obtain the operating status of the elevator car; If the operating state is a docked state: Control the elevator car to turn off the lighting device and control the display device inside the elevator car to switch to black screen mode.

6. The method of claim 1, wherein, The temperature adjustment device of the elevator car is controlled based on the internal temperature and the external temperature to perform corresponding temperature control operations, including: The temperature adjustment device is controlled to perform corresponding temperature control operations based on the temperature change curve and a set temperature value.

7. The method of claim 1, wherein, The corresponding temperature control operations are performed based on the temperature change curve and a set temperature value, including: The corresponding temperature control operations are performed based on the temperature change curve, the heat dissipation amount, and the set temperature value.

8. The method of claim 1, wherein, The method further includes: Determining a stop temperature control time based on the temperature control time; Determining whether the stop temperature control time is later than the arrival time; If yes, obtaining a time deviation between the stop temperature control time and the arrival time; Adjusting the temperature control power based on the time deviation to obtain an adjusted power; Performing corresponding temperature control operations based on the adjusted power and the arrival time.

9. A DC elevator based elevator energy saving control device, adapted to the method of any of claims 1-8, characterized in that, The device includes: A feedback unit configured to obtain a feedback energy and supply power to the DC frequency converter based on the feedback energy and an external power supply; A low-power consumption control unit configured to determine whether the DC elevator meets a preset rest state, control the main control cabinet to enter a low-power consumption mode in a case where the DC elevator meets the preset rest state, and control the main control cabinet to exit the low-power consumption mode in response to an external call signal; A car energy-saving control unit configured to perform energy-saving analysis on an elevator car, generate an energy-saving control scheme, and perform energy-saving control operations on the elevator car based on the energy-saving control scheme.

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