Passenger conveyor heating device and control method, control device and controller therefor

Abstract

The application relates to a passenger conveying equipment heating device and a control method and a control device thereof. The device comprises: a braking resistor attached to a moving part of the passenger conveying equipment; a frequency converter, the output ends of the frequency converter being connected with the input ends of the moving part and the input end of the braking resistor respectively; a temperature sensor arranged in the environment of the passenger conveying equipment, the temperature sensor being used for monitoring the ambient temperature of the passenger conveying equipment; and a controller connected with the temperature sensor, the control end of the controller being connected with the controlled end of the frequency converter, the controller being used for acquiring the ambient temperature and being used for controlling the frequency converter to supply power to the braking resistor to heat the moving part when it is determined that the moving part has a risk of icing according to the ambient temperature. The above device can heat the moving part to prevent icing from occurring only by relying on the braking resistor and the frequency converter of the equipment itself, and does not need to additionally increase heating components, so that the cost is lower.

Description

Technical Field

[0001] This application relates to the field of heating control technology, and in particular to a heating device for passenger transport equipment and its control method, control device and controller. Background Technology

[0002] With the development of elevator and escalator technologies, elevators and escalators are becoming increasingly widely used, even in outdoor settings. In extremely cold outdoor conditions, the moving parts of elevators and escalators can freeze due to low temperatures, affecting their normal operation.

[0003] Currently, the above-mentioned icing problem is often solved by adding additional heating components to heat the moving parts.

[0004] However, adopting the above approach often increases the overall cost. Summary of the Invention

[0005] Therefore, it is necessary to provide a passenger transport heating device and its control method, control device, controller, and passenger transport equipment that can reduce costs and prevent icing of passenger transport equipment, in order to address the above-mentioned technical problems.

[0006] In a first aspect, a heating device for a passenger transport equipment is provided, the heating device comprising:

[0007] Braking resistor, which is attached to the moving parts of passenger conveying equipment;

[0008] The inverter's output terminals are connected to the input terminals of the moving parts and the braking resistor, respectively.

[0009] Temperature sensor: The temperature sensor is placed in the environment where the passenger conveyor is located and is used to monitor the ambient temperature of the passenger conveyor.

[0010] The controller is connected to a temperature sensor. The controller's control terminal is connected to the controlled terminal of the frequency converter. The controller is used to obtain the ambient temperature and, based on the ambient temperature, to control the frequency converter to supply power to the braking resistor when it determines that there is a risk of icing on the moving parts, so that the braking resistor can heat the moving parts.

[0011] In one embodiment, the controller is configured to control the inverter to supply power to the braking resistor when the ambient temperature is lower than a first preset temperature; the first preset temperature is the highest temperature at which the moving parts freeze.

[0012] In one embodiment, the controller is further configured to control the inverter to stop supplying power to the braking resistor when the ambient temperature is higher than a second preset temperature, wherein the second preset temperature is higher than the first preset temperature.

[0013] In one embodiment, the feedback terminal of the frequency converter is connected to the receiving terminal of the controller. The controller is also used to obtain the load of the frequency converter. When the load is lower than the preset load and the ambient temperature is lower than the first preset temperature, the controller controls the frequency converter to supply power to the braking resistor. The preset load is a reference load for determining that the bus voltage of the frequency converter is not undervoltage.

[0014] In one embodiment, the controller is also configured to control the inverter to stop supplying power to the braking resistor when the load is higher than a preset load.

[0015] In one embodiment, the controller is also configured to control the inverter to supply power to the braking resistor with an output power that is negatively correlated with the ambient temperature, based on the ambient temperature.

[0016] Secondly, a heating control method for a passenger transport device is provided, the heating control method for the passenger transport device comprising:

[0017] The ambient temperature of the temperature sensor is obtained. The temperature sensor is placed in the environment where the passenger conveyor is located and is used to monitor the ambient temperature of the passenger conveyor.

[0018] When the ambient temperature indicates a risk of icing on the moving parts, the frequency converter supplies power to the braking resistor. The braking resistor is attached to the moving parts of the passenger transport equipment and is used to heat the moving parts. The output terminal of the frequency converter is connected to the input terminal of the moving parts and the input terminal of the braking resistor, respectively, and the frequency converter supplies power to the braking resistor.

[0019] Thirdly, a heating control device for a passenger transport equipment is provided, the passenger transport equipment heating control device comprising:

[0020] The temperature acquisition module is used to acquire the ambient temperature of the temperature sensor, which is installed in the environment where the passenger conveyor is located, and is used to monitor the ambient temperature of the passenger conveyor.

[0021] The heating control module is used to control the frequency converter to supply power to the braking resistor when the ambient temperature determines that there is a risk of icing on the moving parts. The braking resistor is attached to the moving parts of the passenger conveyor and is used to heat the moving parts. The output terminal of the frequency converter is connected to the input terminal of the moving parts and the input terminal of the braking resistor respectively, and the frequency converter is used to supply power to the braking resistor.

[0022] Fourthly, a controller is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the method described above.

[0023] Fourthly, a passenger transport device is provided, the passenger transport device comprising:

[0024] A passenger transport equipment heating device as described in any of the above embodiments;

[0025] The conveying equipment body includes moving parts, and a braking resistor is attached to the moving parts.

[0026] The aforementioned passenger transport equipment heating device and its control method, control device, controller, and passenger transport equipment, based on the braking resistor and frequency converter built into the passenger transport equipment itself, allows the controller to obtain the ambient temperature monitored by a temperature sensor installed in the environment where the passenger transport equipment is located. When the ambient temperature determines that there is a risk of icing in the moving parts, the controller controls the frequency converter to supply power to the braking resistor attached to the moving parts of the passenger transport equipment, so that the braking resistor heats the moving parts, thereby preventing the moving parts from failing to operate normally due to icing. Compared with heating the moving parts by adding additional heating components, this application can achieve heating of the moving parts to prevent icing by relying solely on the braking resistor and frequency converter built into the equipment itself, which is more cost-effective. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the heating device of the passenger conveyor equipment in one embodiment;

[0029] Figure 2 This is a schematic flowchart of a heating control method for a passenger transport device in one embodiment;

[0030] Figure 3 This is a structural block diagram of a passenger conveyor heating control device in one embodiment;

[0031] Figure 4 This is a diagram of the internal structure of the controller in one embodiment. Detailed Implementation

[0032] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0034] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.

[0035] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. Furthermore, in the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if there is transmission of electrical signals or data between the connected objects.

[0036] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0037] In one embodiment, such as Figure 1 As shown, a heating device for a passenger transport equipment is provided, including a braking resistor 2, a frequency converter 4, a temperature sensor 6, and a controller 8. The braking resistor 2 is attached to the moving parts of the passenger transport equipment. The output terminal of the frequency converter 4 is connected to the input terminal of the moving parts and the input terminal of the braking resistor 2, respectively. The temperature sensor 6 is placed in the environment where the passenger transport equipment is located and is used to monitor the ambient temperature of the passenger transport equipment. The controller 8 is connected to the temperature sensor 6, and the control terminal of the controller 8 is connected to the controlled terminal of the frequency converter 4. The controller 8 is used to acquire the ambient temperature and, when it is determined that there is a risk of icing on the moving parts based on the ambient temperature, controls the frequency converter 4 to supply power to the braking resistor 2 so that the braking resistor 2 heats the moving parts.

[0038] The passenger transport equipment can refer to elevators, escalators, and other similar devices. Moving parts can include mechanical components and drive devices connected to these mechanical components, where the drive device drives the mechanical components. In one specific embodiment, when the passenger transport equipment is an escalator, the mechanical components can refer to steps, traction chains, sprockets, handrails, and other components. Similarly, when the passenger transport equipment is an elevator, the moving parts refer to pulleys and other components in the traction system. The drive device can be a motor or similar device that drives the mechanical components. It should be noted that the above-mentioned passenger transport equipment and moving parts are only illustrative examples and are not intended to limit the scope. Those skilled in the art can make adaptive interpretations based on actual scenarios. The frequency converter 4 is an essential component for realizing the basic transport function of the passenger transport equipment itself. It is mainly used to regulate the voltage and frequency of the power output to the drive device. Its specific principles and functional implementation processes are well known to those skilled in the art and will not be elaborated here. The controller 8 can be a device such as an MCU (Microcontroller Unit), a single-chip microcomputer, or an FPGA (Field Programmable Gate Array).

[0039] Specifically, a temperature sensor 6 installed in the environment where the passenger transport equipment is located monitors the ambient temperature in real time, acquires the ambient temperature data, and performs analog-to-digital signal conversion. The controller 8 acquires the ambient temperature data from the temperature sensor 6 and determines whether there is a risk of icing based on the acquired ambient temperature data. If an icing risk is determined, a heating control signal is output to the frequency converter 4. After receiving the heating control signal, the frequency converter 4 opens the brake tube to supply power to the brake resistor 2, so that the brake resistor 2 is heated under the action of the bus voltage of the frequency converter 4, thereby preventing the moving parts from failing to operate normally due to icing.

[0040] In the above embodiments, based on the braking resistor 2 and frequency converter 4 built into the passenger transport equipment itself, the controller 8 obtains the ambient temperature monitored by the temperature sensor 6 set in the environment where the passenger transport equipment is located. When it is determined that there is a risk of icing in the moving parts based on the ambient temperature, the controller controls the frequency converter 4 to supply power to the braking resistor 2 attached to the moving parts of the passenger transport equipment, so that the braking resistor 2 heats the moving parts, thereby preventing the moving parts from failing to operate normally due to icing. Compared with heating the moving parts by adding additional heating components, this application can achieve heating of the moving parts to prevent icing by relying only on the braking resistor 2 and frequency converter 4 built into the passenger transport equipment itself, which is more cost-effective.

[0041] In one embodiment, the controller 8 is used to control the inverter 4 to supply power to the braking resistor 2 when the ambient temperature is lower than a first preset temperature; the first preset temperature is the highest temperature when the moving parts freeze.

[0042] As mentioned above, the first preset temperature is the highest temperature at which the moving parts freeze. In one specific embodiment, the highest temperature at which the moving parts freeze can be 0°C. Under standard atmospheric pressure, 0°C is the temperature at which water freezes in most cases. Therefore, by setting the highest temperature to 0°C, the needs of most usage scenarios for passenger transport equipment can be met. It should be noted that, in order to meet the needs of more usage scenarios, those skilled in the art can adaptively adjust the first preset temperature according to parameters such as the atmospheric pressure of the environment where the passenger transport equipment is located, to overcome the different freezing temperatures of the moving parts caused by different atmospheric pressures; for example, in one specific embodiment, when the atmospheric pressure of the environment where the passenger transport equipment is located is higher than standard atmospheric pressure, the first preset temperature can be set to below 0°C. Furthermore, the first preset temperature can be adjusted according to the different water compositions in the scenario where the passenger transport equipment is used. For example, in a specific embodiment, when the passenger transport equipment is set on a sea vessel, the first preset temperature can be set lower (e.g., -10℃) to match the effect of salt in seawater on the freezing point of water. This avoids the controller 8 misjudging the freezing of moving parts due to the first preset temperature being set too high in this environment, which would cause the braking resistor 2 to continue heating and increase energy consumption.

[0043] Specifically, when the controller 8 detects that the ambient temperature is lower than the first preset temperature, it determines that there is a risk of icing in the moving parts. It then controls the inverter 4 to supply power to the braking resistor 2, thereby ensuring that the braking resistor 2 is continuously heated to prevent the moving parts from freezing and failing to operate normally. At the same time, depending on the first preset temperature, it can meet the needs of preventing the moving parts from freezing in multiple scenarios.

[0044] In one embodiment, the controller 8 is further configured to control the inverter 4 to stop supplying power to the braking resistor 2 when the ambient temperature is higher than a second preset temperature, wherein the second preset temperature is higher than the first preset temperature.

[0045] The second preset temperature needs to be set with reference to the first preset temperature. In a specific embodiment, if the first preset temperature is set to 0°C, the second preset temperature can be set to 2°C, that is, the second preset temperature only needs to be set slightly higher than the first preset temperature.

[0046] Specifically, once the ambient temperature exceeds the first preset temperature, it can generally be determined that the moving parts will no longer freeze. The controller 8 only controls the inverter 4 to stop supplying power to the braking resistor 2 to stop heating the braking resistor 2 when the ambient temperature stabilizes at a second preset temperature that is slightly higher than the first preset temperature. Instead of immediately stopping heating the braking resistor 2 as soon as the ambient temperature exceeds the first preset temperature, this avoids the risk of freezing due to unstable ambient temperature that causes the ambient temperature to drop below the first preset temperature after just exceeding it. It also avoids repeatedly switching the heating control switch of the braking resistor 2, reducing the computational burden on the controller 8.

[0047] In one embodiment, the feedback terminal of the inverter 4 is connected to the receiving terminal of the controller 8. The controller 8 is also used to obtain the load of the inverter 4. When the load is lower than the preset load and the ambient temperature is lower than the first preset temperature, the controller controls the inverter 4 to supply power to the braking resistor 2. The preset load is a reference load for determining that the bus voltage of the inverter 4 is not undervoltage.

[0048] Here, bus voltage refers to the total system voltage in the power system of the passenger transport equipment that can meet the normal operation of the passenger transport equipment. That is, the total system voltage that can ensure the safe operation of each device at its corresponding operating voltage during the operation of the passenger transport equipment. In a specific embodiment, when the passenger transport equipment is an escalator, the load of the frequency converter 4 can include the upward load and the downward load of the escalator, that is, the sum of the actual operating voltages of each device when moving upward and the sum of the actual operating voltages of each device when moving downward. It should be noted that, under the same load, since the upward movement requires work to overcome gravity, the sum of the actual operating voltages of each device when moving upward is greater than the sum of the actual operating voltages of each device when moving downward.

[0049] Specifically, by monitoring the load of the frequency converter 4 in real time, the frequency converter 4 is controlled to supply power to the braking resistor 2 only when its load is lower than the preset load and the ambient temperature is lower than the first preset temperature. In addition to controlling the heating of the braking resistor 2 based on the ambient temperature, the excess voltage of the bus voltage is used to heat the braking resistor 2 in combination with the load of the passenger transport equipment, on the basis of ensuring the normal operation of the passenger transport equipment, thereby further ensuring the safety of the passenger transport equipment.

[0050] In one embodiment, the controller 8 is also configured to control the inverter 4 to stop supplying power to the braking resistor 2 when the load is higher than a preset load.

[0051] Specifically, during the process of supplying power to the braking resistor 2, the load on the passenger conveyor may exceed the preset load. This indicates that the components of the equipment may be undervoltage, meaning they cannot operate at their rated voltage to ensure the basic conveying function of the passenger conveyor. For example, when the passenger conveyor is an escalator, undervoltage in the drive unit may result in insufficient output traction, causing the conveyor belt to malfunction. This leads to electrical energy not being converted into kinetic energy but into heat energy, causing the drive unit to overheat and potentially damage it. Upon detecting this situation, the controller 8 controls the frequency converter 4 to stop supplying power to the braking resistor 2, ensuring the load on the passenger conveyor remains within the preset load and prioritizing the normal operation of the conveying function to prevent damage to components due to undervoltage.

[0052] In one embodiment, the controller 8 is also configured to control the inverter 4 to supply power to the braking resistor 2 with an output power that is negatively correlated with the ambient temperature, based on the ambient temperature.

[0053] Specifically, when heating the braking resistor 2, the power output of the inverter 4 to the braking resistor 2 can be controlled according to the ambient temperature to control the heating rate of the braking resistor 2. That is, the higher the ambient temperature, the lower the power output of the inverter 4 to the braking resistor 2; the lower the ambient temperature, the higher the power output of the inverter 4 to the braking resistor 2. For example, in a specific embodiment, when the first preset temperature is 0°C and the ambient temperature is -2°C, the inverter 4 can be controlled to output a lower power to the braking resistor 2, while when the ambient temperature is -10°C, the inverter 4 can be controlled to output a higher power to the braking resistor 2 to increase the heating rate of the braking resistor 2 and avoid icing of moving parts due to insufficient heating rate caused by rapid drop in ambient temperature during operation.

[0054] In one embodiment, a passenger transport device is provided, characterized in that it includes: a passenger transport device heating device as described in the above embodiment; a transport device body including a moving part, and a braking resistor attached to the moving part.

[0055] Specifically, by heating the moving parts in the passenger transport equipment body using a heating device, the malfunction of the passenger transport equipment caused by icing of the moving parts due to ambient temperature can be prevented.

[0056] In one embodiment, such as Figure 2 As shown, a heating control method for a passenger transport device is provided, the method comprising:

[0057] S202, Obtain the ambient temperature of temperature sensor 6. Temperature sensor 6 is installed in the environment where the passenger transport equipment is located and is used to monitor the ambient temperature of the passenger transport equipment.

[0058] S204, when it is determined that there is a risk of icing on the moving parts based on the ambient temperature, the frequency converter 4 is controlled to supply power to the braking resistor 2. The braking resistor 2 is attached to the moving parts of the passenger transport equipment and is used to heat the moving parts. The output terminal of the frequency converter 4 is connected to the input terminal of the moving parts and the input terminal of the braking resistor 2 respectively, and the frequency converter 4 is used to supply power to the braking resistor 2.

[0059] The explanations of the terms mentioned above can be found in the above embodiments. The method in this embodiment corresponds to the passenger transport equipment heating device in the above embodiments, and its specific implementation can also be found in the description of the above embodiments, which will not be repeated here.

[0060] In the above embodiment, by monitoring the ambient temperature of the passenger transport equipment and determining that there is a risk of icing on the moving parts based on the ambient temperature, the inverter 4 is controlled to supply power to the braking resistor 2 attached to the moving parts of the passenger transport equipment to achieve heating. Using this method, heating of the moving parts to prevent icing can be achieved solely by the braking resistor 2 and inverter 4 integrated into the equipment itself, resulting in lower costs.

[0061] It should be understood that although the steps in the flowchart of section 2 are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in section 2 may include multiple steps or multiple stages, which are not necessarily completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps.

[0062] In one embodiment, such as Figure 3 As shown, a passenger transport equipment heating control device is provided, the passenger transport equipment heating control device includes:

[0063] Temperature acquisition module 302 is used to acquire the ambient temperature of temperature sensor 6. Temperature sensor 6 is set in the environment where the passenger conveyor is located and is used to monitor the ambient temperature of the passenger conveyor.

[0064] The heating control module 304 is used to control the frequency converter 4 to supply power to the braking resistor 2 when the ambient temperature determines that there is a risk of icing in the moving parts. The braking resistor 2 is attached to the moving parts of the passenger conveyor and is used to heat the moving parts. The output terminal of the frequency converter 4 is connected to the input terminal of the moving parts and the input terminal of the braking resistor 2 respectively, and the frequency converter 4 is used to supply power to the braking resistor 2.

[0065] Specific limitations regarding the heating control device for passenger transport equipment can be found in the above-described limitations of the heating control method for passenger transport equipment, and will not be repeated here. Each module in the aforementioned heating device for passenger transport equipment can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in the controller in hardware form, or stored in the memory of the controller in software form, so that the processor can call and execute the operations corresponding to each module. It should be noted that the module division in this embodiment is illustrative and only represents a logical functional division; other division methods may be used in actual implementation.

[0066] In one embodiment, a controller is provided, which may be a server, and its internal structure diagram may be as follows: Figure 4 As shown, the controller includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database stores ambient temperature data. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communicating with external terminals via a network. When the computer program is executed by the processor, it implements a heating control method for a passenger transport device.

[0067] Those skilled in the art will understand that Figure 4 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the controller to which the present application is applied. A specific controller may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0068] In one embodiment, a controller is provided, including a memory and a processor, the memory storing a computer program, the processor executing the computer program to implement the steps in the above method embodiments.

[0069] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps in the above method embodiments.

[0070] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0071] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0072] In the description of this specification, references to terms such as "some embodiments," "other embodiments," and "ideal embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A heating device for passenger transport equipment, characterized in that, include: A braking resistor is attached to a moving part of the passenger conveyor; the braking resistor is a braking resistor built into the passenger conveyor. A frequency converter, the output terminal of which is connected to the input terminal of the moving part and the input terminal of the braking resistor, respectively; A temperature sensor is disposed in the environment in which the passenger transport equipment is located, and the temperature sensor is used to monitor the ambient temperature of the passenger transport equipment. The controller is connected to the temperature sensor, and the control terminal of the controller is connected to the controlled terminal of the frequency converter. The controller is used to acquire the ambient temperature and, based on the ambient temperature, to determine that there is a risk of icing in the moving part during operation, to control the frequency converter to supply power to the braking resistor so that the braking resistor heats the moving part. The controller is used to control the frequency converter to supply power to the braking resistor when the ambient temperature is lower than a first preset temperature; the first preset temperature is the highest temperature at which the moving part freezes. The feedback terminal of the frequency converter is connected to the receiving terminal of the controller. The controller is also used to obtain the load of the frequency converter. When the load is lower than the preset load and the ambient temperature is lower than the first preset temperature, the controller controls the frequency converter to supply power to the braking resistor. The preset load is a reference load for determining that the bus voltage of the frequency converter is not undervoltage.

2. The passenger transport equipment heating device according to claim 1, characterized in that, The controller is also configured to control the frequency converter to stop supplying power to the braking resistor when the ambient temperature is higher than the second preset temperature, wherein the second preset temperature is greater than the first preset temperature.

3. The passenger transport equipment heating device according to claim 1, characterized in that, The controller is also used to control the frequency converter to stop supplying power to the braking resistor when the load is higher than the preset load.

4. The passenger transport equipment heating device according to claim 1, characterized in that, The controller is also configured to control the frequency converter to supply power to the braking resistor with an output power that is negatively correlated with the ambient temperature, based on the ambient temperature.

5. A heating control method for passenger transport equipment, characterized in that, The method includes: The ambient temperature of the temperature sensor is obtained. The temperature sensor is located in the environment where the passenger transport equipment is situated and is used to monitor the ambient temperature of the passenger transport equipment. When the ambient temperature indicates a risk of icing in the moving parts during operation, the inverter is controlled to supply power to the braking resistor. The braking resistor is attached to the moving parts of the passenger conveyor and is used to heat the moving parts. The output terminal of the inverter is connected to both the input terminal of the moving parts and the input terminal of the braking resistor, and the inverter is used to supply power to the braking resistor. The braking resistor is a built-in braking resistor of the passenger conveyor. Wherein, when the ambient temperature is lower than a first preset temperature, the frequency converter is controlled to supply power to the braking resistor; the first preset temperature is the highest temperature at which the moving part freezes. The load of the frequency converter is obtained. When the load is lower than the preset load and the ambient temperature is lower than the first preset temperature, the frequency converter is controlled to supply power to the braking resistor. The preset load is a reference load for determining that the bus voltage of the frequency converter is not undervoltage.

6. A heating control device for passenger transport equipment, characterized in that, include: A temperature acquisition module is used to acquire the ambient temperature of a temperature sensor, which is located in the environment of the passenger transport equipment and is used to monitor the ambient temperature of the passenger transport equipment. A heating control module is used to control the frequency converter to supply power to the braking resistor when it is determined that there is a risk of icing in the moving parts during operation based on the ambient temperature. The braking resistor is attached to the moving parts of the passenger conveyor and is used to heat the moving parts. The output terminal of the frequency converter is connected to the input terminal of the moving parts and the input terminal of the braking resistor, respectively, and the frequency converter is used to supply power to the braking resistor. The braking resistor is a built-in braking resistor of the passenger conveyor. The heating control module is also used to control the frequency converter to supply power to the braking resistor when the ambient temperature is lower than the first preset temperature; the first preset temperature is the highest temperature when the moving part freezes. The heating control module is also used to obtain the load of the frequency converter, and when the load is lower than the preset load and the ambient temperature is lower than the first preset temperature, control the frequency converter to supply power to the braking resistor. The preset load is a reference load for determining that the bus voltage of the frequency converter is not undervoltage.

7. A controller comprising a memory and a processor, the memory storing a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method described in claim 5.

8. A passenger transport device, characterized in that, include: The passenger transport equipment heating device as described in any one of claims 1-4 above; The conveying equipment body includes the moving part, and the braking resistor is attached to the moving part.

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