PHM system platform for rail transit air-conditioner

Abstract

Disclosed in the present application is a PHM system platform for a rail transit air-conditioner, the system comprising: an intelligent operation and maintenance control module, which is configured to acquire operation information of a refrigeration piping system; an air-conditioner controller, which is configured to acquire operation information of main electrical elements of an air-conditioner unit; a vehicle-mounted PHM unit, which is configured to acquire integrated information and transmit same to a data center server; the data center server, which acquires analysis data and analysis results of the air-conditioner unit; an intelligent air-conditioner operation and maintenance server, which is used for reading the integrated information from the data center server, processing the acquired integrated information to obtain the analysis data and analysis results of the air-conditioner unit, and transmitting same to the data center server; and an owner monitoring center and a manufacturer data center, which are used for visually displaying the analysis data and analysis results of the air-conditioner unit and saving the analysis data and analysis results of the air-conditioner unit. The PHM system management platform for a rail transit air-conditioner that is disclosed in the present application helps administrators to acquire and understand information in a highly visual and intelligent manner, and to make quick and effective decisions.

Description

A PHM system platform for rail transit air conditioning Technical Field

[0001] This invention relates to the field of rail transit air conditioning system technology, and in particular to a PHM system platform for rail transit air conditioning. Background Technology

[0002] With the nation's vigorous promotion of building a strong transportation nation, technological innovation is gaining new vitality and being led by intelligence. Deeply integrating new technologies such as big data, the internet, artificial intelligence, and supercomputing with the transportation industry is the future development trend of the rail transit sector. High-speed trains have already transformed into intelligent trains, and air conditioning systems have undergone intelligent improvements.

[0003] Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a PHM system platform for air conditioning in rail transit.

[0005] The technical means employed in this invention are as follows:

[0006] A PHM system platform for rail transit air conditioning includes:

[0007] The intelligent operation and maintenance control module connects to the sensors of the refrigeration piping system in the air conditioning unit to acquire the operating information of the refrigeration piping system and send the acquired operating information of the refrigeration piping system to the air conditioning controller.

[0008] The air conditioning controller is connected to the sensors of the main electrical components of the air conditioning unit to obtain the operating information of the main electrical components of the air conditioning unit, and integrates the operating information of the refrigeration piping system and the operating information of the main electrical components to form integrated information, and transmits the integrated information to the vehicle PHM host.

[0009] The vehicle-mounted PHM host is used to acquire the integrated information and transmit it to the data center server in real time via a vehicle-to-ground wireless communication network.

[0010] The data center server stores the acquired integrated information; it acquires the air conditioning unit analysis data and analysis results sent by the air conditioning intelligent operation and maintenance server, and sends the air conditioning unit analysis data and analysis results to the owner's monitoring center and the manufacturer's data center;

[0011] An intelligent air conditioning operation and maintenance server is used to read the integrated information from the data center server, process the acquired integrated information to obtain air conditioning unit analysis data and analysis results, and transmit the air conditioning unit analysis data and analysis results to the data center server.

[0012] The owner monitoring center is used to obtain air conditioning unit analysis data and results from the data center server and to visualize the air conditioning unit analysis data and results; and,

[0013] The manufacturer's data center is used to obtain air conditioning unit analysis data and results from the data center server, visualize the air conditioning unit analysis data and results, and save the air conditioning unit analysis data and results.

[0014] Furthermore, the sensors in the refrigeration piping system include a return air temperature and humidity sensor, a fresh air temperature and humidity sensor, a system supply air temperature and humidity sensor, a system high-pressure sensor, a system low-pressure sensor, a compressor suction temperature sensor, a compressor discharge temperature sensor, an evaporator temperature sensor, a condenser temperature sensor, and a filter differential pressure sensor.

[0015] The operating information of the refrigeration piping system includes return air temperature, return air humidity, fresh air temperature, fresh air humidity, system supply air temperature, system supply air humidity, system high pressure value, system low pressure value, compressor suction temperature, compressor discharge temperature, evaporator temperature, condenser temperature, and filter pressure difference.

[0016] The sensors for the main electrical components include compressor current transformers, evaporator current transformers, condenser current transformers, electric heating current transformers, and unit current transformers.

[0017] The operating information of the main electrical components includes the three-phase current values ​​of the compressor, the blower, the condenser, the electric heater, and the unit.

[0018] Furthermore, the analysis data and results of the air conditioning unit include status monitoring, fault alarms, and status early warnings.

[0019] Furthermore, the status monitoring includes return air temperature monitoring, return air humidity monitoring, fresh air temperature monitoring, fresh air humidity monitoring, supply air temperature monitoring, supply air humidity monitoring, system high pressure monitoring, system low pressure monitoring, compressor suction temperature monitoring, compressor discharge temperature monitoring, evaporator temperature monitoring, condenser temperature monitoring, filter differential pressure monitoring, compressor three-phase current monitoring, supply fan three-phase current monitoring, condenser fan three-phase current monitoring, electric heating three-phase current monitoring, and unit three-phase current monitoring;

[0020] The fault alarms include: clogged fresh air filter, clogged return air filter, refrigerant leak, excessively high compressor discharge temperature, compressor malfunction, evaporator fan self-protection fault, evaporator fan malfunction, condenser fan self-protection fault, condenser fan malfunction, return air valve malfunction, fresh air valve malfunction, fresh air temperature and humidity sensor malfunction, return air temperature and humidity sensor malfunction, high pressure sensor malfunction, low pressure sensor malfunction, temperature sensor malfunction, current transformer malfunction, differential pressure sensor malfunction, clogged condenser, and clogged evaporator.

[0021] The status warnings include compressor maintenance, evaporator fan maintenance, condenser fan maintenance, electric heating maintenance, and evaporator and condenser maintenance.

[0022] Furthermore, the air conditioning intelligent operation and maintenance server processes the integrated information according to the fault diagnosis strategy to obtain fault information;

[0023] Fault diagnosis strategies include: if the fresh air filter pressure differential value is higher than the set fresh air filter pressure differential threshold, it is diagnosed as a clogged fresh air filter;

[0024] If the return air filter pressure differential value is higher than the set return air filter pressure differential threshold, it is diagnosed as a clogged return air filter.

[0025] The set pressure threshold for the refrigeration piping was diagnosed as a refrigerant leak fault.

[0026] If the compressor discharge temperature is higher than the set compressor discharge temperature threshold, it is diagnosed as a compressor discharge temperature too high fault.

[0027] If the compressor current exceeds the set compressor current threshold range, it is diagnosed as a compressor malfunction.

[0028] If the evaporator fan current value is higher than the set evaporator fan current threshold range, it is diagnosed as an evaporator fan malfunction.

[0029] If the condenser fan current value is higher than the set condenser fan current threshold range, it is diagnosed as a condenser fan malfunction.

[0030] If the fresh air temperature and humidity exceed the set threshold of the fresh air temperature and humidity sensor or there is no feedback, the fresh air temperature and humidity sensor is diagnosed as faulty.

[0031] If the return air temperature and humidity exceed the set threshold of the return air temperature and humidity sensor or there is no feedback, the diagnosis is a fault in the return air temperature and humidity sensor.

[0032] If the system high pressure value exceeds the set system high pressure threshold range or there is no feedback, the diagnosis is a high pressure sensor malfunction.

[0033] If the system low pressure value exceeds the set system low pressure threshold range or there is no feedback, the diagnosis is a low pressure sensor malfunction.

[0034] If the system supply air temperature and humidity values ​​exceed the set threshold of the system supply air temperature and humidity sensor or there is no feedback, the system supply air temperature and humidity sensor is diagnosed as faulty.

[0035] If the compressor suction temperature exceeds the set compressor suction temperature threshold range or there is no feedback, the diagnosis is a compressor suction temperature sensor malfunction.

[0036] If the compressor discharge temperature exceeds the set compressor discharge temperature threshold range or there is no feedback, the diagnosis is a compressor discharge temperature sensor malfunction.

[0037] If the evaporator temperature value exceeds the set evaporator temperature threshold range or there is no feedback, the diagnosis is a faulty evaporator temperature sensor.

[0038] If the condenser temperature value exceeds the set condenser temperature threshold range or there is no feedback, the diagnosis is a condenser temperature sensor malfunction.

[0039] If the compressor current value exceeds the set compressor current threshold range or there is no feedback, the diagnosis is a compressor current transformer fault.

[0040] If the evaporator fan current value exceeds the set evaporator fan current threshold range or there is no feedback, the diagnosis is a fault in the evaporator fan current transformer.

[0041] If the condenser fan current value exceeds the set condenser fan current threshold range or there is no feedback, the diagnosis is a condenser fan current transformer fault.

[0042] If the electric heating current value exceeds the set electric heating current threshold range or there is no feedback, it is diagnosed as a fault in the electric heating current transformer.

[0043] If the unit current value exceeds the set unit current threshold range or there is no feedback, it is diagnosed as a fault in the unit current transformer.

[0044] If the filter differential pressure value exceeds the set filter differential pressure threshold range or there is no feedback, the filter differential pressure sensor is diagnosed as faulty.

[0045] If the refrigeration pipe pressure is higher than the set refrigeration pipe threshold range, the fresh air temperature is within the set fresh air temperature threshold range, and the condenser fan current is within the set condenser fan current threshold range, the condenser is diagnosed as being clogged.

[0046] If the refrigeration pipe pressure is below the set refrigeration pipe threshold range, the evaporator fan current is within the set evaporator fan current threshold range, and there is no refrigerant leakage, the diagnosis is evaporator blockage.

[0047] Furthermore, the air conditioning intelligent operation and maintenance server processes the integrated information according to the status early warning strategy to obtain status early warning information;

[0048] The status early warning strategy includes: obtaining the actual running time of the compressor, determining whether the actual running time of the compressor is higher than the designed running time of the compressor, and if so, determining it as a compressor maintenance early warning;

[0049] Obtain the actual operating time of the evaporator fan, and determine whether the actual operating time of the evaporator fan is higher than the designed operating time of the evaporator fan. If so, it is determined to be an evaporator fan maintenance warning.

[0050] Obtain the actual operating time of the condenser fan and determine whether the actual operating time of the condenser fan is higher than the designed operating time of the condenser fan. If so, it is determined to be a condenser fan maintenance warning.

[0051] Get the air supply temperature value within a set time period, and determine whether the air supply temperature within the set time period is lower than the set air supply temperature threshold. If so, it is determined to be an electric heating maintenance warning.

[0052] Obtain the supply air temperature value within a set time period, and determine whether the supply air temperature within the set time period is higher than the set supply air temperature threshold. If so, determine it as an evaporator and condenser maintenance warning.

[0053] Compared with existing technologies, the PHM system platform for rail transit air conditioning disclosed in this invention has the following beneficial effects: The PHM system management platform for rail transit air conditioning disclosed in this invention helps managers acquire and understand information in a highly visualized and intelligent manner, making rapid and effective decisions. It also helps maintenance personnel improve maintenance efficiency and quality in a highly transparent manner, significantly reducing management and maintenance costs. Furthermore, it provides an excellent data platform for in-depth research and practice of PHM, thus laying a solid foundation for solving key technical issues in vehicle air conditioning systems. Attached Figure Description

[0054] Figure 1 is a system block diagram of the PHM system platform for rail transit air conditioning disclosed in this invention;

[0055] Figure 2 is a schematic diagram of the framework of the PHM system platform for rail transit air conditioning disclosed in this invention; Detailed Implementation

[0056] Figures 1 and 2 show the PHM system platform for rail transit air conditioning disclosed in this invention, including:

[0057] The intelligent operation and maintenance control module connects to the sensors of the refrigeration piping system in the air conditioning unit to acquire the operating information of the refrigeration piping system and send the acquired operating information of the refrigeration piping system to the air conditioning controller.

[0058] The air conditioning controller is connected to sensors of the main electrical components of the air conditioning unit to obtain the operating information of the main electrical components of the air conditioning unit. It integrates the operating information of the refrigeration piping system and the operating information of the main electrical components to form integrated information, and transmits the integrated information to the vehicle PHM host. The air conditioning controller can process independent data according to its internal control logic and form a data string (i.e., integrated information), and then transmit it to the vehicle PHM host.

[0059] The vehicle-mounted PHM host is used to acquire the integrated information and transmit it to the data center server in real time via a vehicle-to-ground wireless communication network.

[0060] The data center server stores the acquired integrated information; it acquires the air conditioning unit analysis data and analysis results sent by the air conditioning intelligent operation and maintenance server, and sends the air conditioning unit analysis data and analysis results to the owner's monitoring center and the manufacturer's data center;

[0061] An intelligent air conditioning operation and maintenance server is used to read the integrated information from the data center server, process the acquired integrated information to obtain air conditioning unit analysis data and analysis results, and transmit the air conditioning unit analysis data and analysis results to the data center server.

[0062] The owner monitoring center is used to obtain air conditioning unit analysis data and results from the data center server and to visualize the air conditioning unit analysis data and results; and,

[0063] The manufacturer's data center is used to obtain air conditioning unit analysis data and results from the data center server, visualize the air conditioning unit analysis data and results, and save the air conditioning unit analysis data and results.

[0064] The PHM system management platform for rail transit air conditioning disclosed in this invention not only helps managers acquire and understand information and make quick and effective decisions in a highly visualized and intelligent manner, but also helps maintenance personnel improve maintenance efficiency and quality in a highly transparent manner, significantly reducing management and maintenance costs. Furthermore, it provides an excellent data platform for in-depth research and practice of PHM, thus laying a solid foundation for solving key technical issues in vehicle air conditioning systems.

[0065] Specifically, in this embodiment, the sensors of the refrigeration piping system include a return air temperature and humidity sensor, a fresh air temperature and humidity sensor, a system supply air temperature and humidity sensor, a system high-pressure sensor, a system low-pressure sensor, a compressor suction temperature sensor, a compressor discharge temperature sensor, an evaporator temperature sensor, a condenser temperature sensor, and a filter differential pressure sensor.

[0066] The operating information of the refrigeration piping system includes return air temperature, return air humidity, fresh air temperature, fresh air humidity, system supply air temperature, system supply air humidity, system high pressure value, system low pressure value, compressor suction temperature, compressor discharge temperature, evaporator temperature, condenser temperature, and filter pressure difference.

[0067] The sensors for the main electrical components include compressor current transformers, evaporator current transformers, condenser current transformers, electric heating current transformers, and unit current transformers.

[0068] The operating information of the main electrical components includes the three-phase current values ​​of the compressor, the blower, the condenser, the electric heater, and the unit.

[0069] In other words, in this application, the intelligent operation and maintenance control module is connected to the return air temperature and humidity sensor, fresh air temperature and humidity sensor, system supply air temperature and humidity sensor, system high pressure sensor, system low pressure sensor, compressor suction temperature sensor, compressor discharge temperature sensor, evaporator temperature sensor, condenser temperature sensor, and filter differential pressure sensor in the air conditioning unit of the rail vehicle, and is used to obtain operating data such as return air temperature, return air humidity, fresh air temperature, fresh air humidity, system supply air temperature, system supply air humidity, system high pressure value, system low pressure value, compressor suction temperature, compressor discharge temperature, evaporator temperature, condenser temperature, and filter differential pressure during the operation of the air conditioning unit of the rail vehicle;

[0070] The air conditioning controller is connected to the compressor current transformer, evaporator current transformer, condenser current transformer, electric heater current transformer, and unit current transformer in the air conditioning unit of the rail vehicle. It is used to acquire operating data such as the three-phase current values ​​of the compressor, blower, condenser, electric heater, and unit of the air conditioning unit when the rail vehicle is running. At the same time, the air conditioning controller is also connected to the contactors, control valves, pumps, evaporator, condenser, compressor, electric heater, and other components in the air conditioning unit to control the operation of the air conditioning unit and acquire relevant data information of each component.

[0071] The air conditioning controller can integrate various data information obtained by the intelligent operation and maintenance control module with various data information collected by itself to form integrated information, and then send it to the on-board PHM host on each rail vehicle. The on-board PHM hosts of different rail vehicles can transmit data to the data center server in real time through the vehicle-to-ground wireless communication network. In other words, the data center server can store the operation data of one or more rail vehicles.

[0072] Meanwhile, the air conditioning intelligent operation and maintenance server can read the operation data (integrated information) of the corresponding rail vehicles from the data center server, process the acquired integrated information to obtain air conditioning unit analysis data and analysis results, and transmit the air conditioning unit analysis data and analysis results to the data center server.

[0073] Specifically, the analysis data and results of the air conditioning unit include status monitoring, fault alarms, and status early warnings.

[0074] The status monitoring includes return air temperature monitoring, return air humidity monitoring, fresh air temperature monitoring, fresh air humidity monitoring, supply air temperature monitoring, supply air humidity monitoring, system high pressure monitoring, system low pressure monitoring, compressor suction temperature monitoring, compressor discharge temperature monitoring, evaporator temperature monitoring, condenser temperature monitoring, filter differential pressure monitoring, compressor three-phase current monitoring, supply fan three-phase current monitoring, condenser fan three-phase current monitoring, electric heating three-phase current monitoring, and unit three-phase current monitoring;

[0075] The fault alarms include: clogged fresh air filter, clogged return air filter, refrigerant leak, excessively high compressor discharge temperature, compressor malfunction, evaporator fan self-protection fault, evaporator fan malfunction, condenser fan self-protection fault, condenser fan malfunction, return air valve malfunction, fresh air valve malfunction, fresh air temperature and humidity sensor malfunction, return air temperature and humidity sensor malfunction, high pressure sensor malfunction, low pressure sensor malfunction, temperature sensor malfunction, current transformer malfunction, differential pressure sensor malfunction, clogged condenser, and clogged evaporator.

[0076] The status warnings include compressor maintenance, evaporator fan maintenance, condenser fan maintenance, electric heating maintenance, and evaporator and condenser maintenance.

[0077] Furthermore, the air conditioning intelligent operation and maintenance server processes the integrated information according to the fault diagnosis strategy to obtain fault information;

[0078] The fault diagnosis strategy includes: if the fresh air filter pressure difference value is higher than the set fresh air filter pressure difference threshold, it is diagnosed as a dirty or clogged fresh air filter; that is, the air conditioning intelligent operation and maintenance server obtains the fresh air filter pressure difference value from the integrated information, determines whether the fresh air filter pressure difference value is higher than the set fresh air filter pressure difference threshold, and diagnoses the fresh air filter as dirty or clogged.

[0079] If the return air filter pressure differential value is higher than the set return air filter pressure differential threshold, it is diagnosed as a clogged return air filter.

[0080] The set pressure threshold for the refrigeration piping was diagnosed as a refrigerant leak fault.

[0081] If the compressor discharge temperature is higher than the set compressor discharge temperature threshold, it is diagnosed as a compressor discharge temperature too high fault.

[0082] If the compressor current exceeds the set compressor current threshold range, it is diagnosed as a compressor malfunction.

[0083] If the evaporator fan current value is higher than the set evaporator fan current threshold range, it is diagnosed as an evaporator fan malfunction.

[0084] If the condenser fan current value is higher than the set condenser fan current threshold range, it is diagnosed as a condenser fan malfunction.

[0085] If the fresh air temperature and humidity exceed the set threshold of the fresh air temperature and humidity sensor or there is no feedback, the fresh air temperature and humidity sensor is diagnosed as faulty.

[0086] If the return air temperature and humidity exceed the set threshold of the return air temperature and humidity sensor or there is no feedback, the diagnosis is a fault in the return air temperature and humidity sensor.

[0087] If the system high pressure value exceeds the set system high pressure threshold range or there is no feedback, the diagnosis is a high pressure sensor malfunction.

[0088] If the system low pressure value exceeds the set system low pressure threshold range or there is no feedback, the diagnosis is a low pressure sensor malfunction.

[0089] If the system supply air temperature and humidity values ​​exceed the set threshold of the system supply air temperature and humidity sensor or there is no feedback, the system supply air temperature and humidity sensor is diagnosed as faulty.

[0090] If the compressor suction temperature exceeds the set compressor suction temperature threshold range or there is no feedback, the diagnosis is a compressor suction temperature sensor malfunction.

[0091] If the compressor discharge temperature exceeds the set compressor discharge temperature threshold range or there is no feedback, the diagnosis is a compressor discharge temperature sensor malfunction.

[0092] If the evaporator temperature value exceeds the set evaporator temperature threshold range or there is no feedback, the diagnosis is a faulty evaporator temperature sensor.

[0093] If the condenser temperature value exceeds the set condenser temperature threshold range or there is no feedback, the diagnosis is a condenser temperature sensor malfunction.

[0094] If the compressor current value exceeds the set compressor current threshold range or there is no feedback, the diagnosis is a compressor current transformer fault.

[0095] If the evaporator fan current value exceeds the set evaporator fan current threshold range or there is no feedback, the diagnosis is a fault in the evaporator fan current transformer.

[0096] If the condenser fan current value exceeds the set condenser fan current threshold range or there is no feedback, the diagnosis is a condenser fan current transformer fault.

[0097] If the electric heating current value exceeds the set electric heating current threshold range or there is no feedback, it is diagnosed as a fault in the electric heating current transformer.

[0098] If the unit current value exceeds the set unit current threshold range or there is no feedback, it is diagnosed as a fault in the unit current transformer.

[0099] If the filter differential pressure value exceeds the set filter differential pressure threshold range or there is no feedback, the filter differential pressure sensor is diagnosed as faulty.

[0100] If the refrigeration pipe pressure is higher than the set refrigeration pipe threshold range, the fresh air temperature is within the set fresh air temperature threshold range, and the condenser fan current is within the set condenser fan current threshold range, the condenser is diagnosed as being clogged.

[0101] If the refrigeration pipe pressure is below the set refrigeration pipe threshold range, the evaporator fan current is within the set evaporator fan current threshold range, and there is no refrigerant leakage, the diagnosis is evaporator blockage.

[0102] The above fault diagnosis processes are the same: the intelligent operation and maintenance server obtains relevant data values ​​from the data center server, compares the obtained values ​​with the set threshold, and then diagnoses whether a fault exists and what kind of fault it is.

[0103] Furthermore, the air conditioning intelligent operation and maintenance server processes the integrated information according to the status early warning strategy to obtain status early warning information;

[0104] The status early warning strategy includes: obtaining the actual running time of the compressor, determining whether the actual running time of the compressor is higher than the designed running time of the compressor, and if so, determining it as a compressor maintenance early warning;

[0105] Obtain the actual operating time of the evaporator fan, and determine whether the actual operating time of the evaporator fan is higher than the designed operating time of the evaporator fan. If so, it is determined to be an evaporator fan maintenance warning.

[0106] Obtain the actual operating time of the condenser fan and determine whether the actual operating time of the condenser fan is higher than the designed operating time of the condenser fan. If so, it is determined to be a condenser fan maintenance warning.

[0107] Get the air supply temperature value within a set time period, and determine whether the air supply temperature within the set time period is lower than the set air supply temperature threshold. If so, it is determined to be an electric heating maintenance warning.

[0108] Obtain the supply air temperature value within a set time period, and determine whether the supply air temperature within the set time period is higher than the set supply air temperature threshold. If so, determine it as an evaporator and condenser maintenance warning.

[0109] After processing the acquired data, the air conditioning intelligent operation and maintenance server obtains air conditioning unit analysis data and analysis results (including status monitoring, fault alarms and status early warnings), and transmits the air conditioning unit analysis data and analysis results (including status monitoring, fault alarms and status early warnings) to the data center server.

[0110] The data center server sends the air conditioning unit analysis data and results to the owner's monitoring center and the manufacturer's data center for visualization and / or storage.

[0111] This embodiment provides a PHM system management platform for rail transit air conditioning, which is used to realize intelligent operation and maintenance of rail air conditioning. The overall framework of the system management platform includes two parts: a signal source and an air conditioning intelligent operation and maintenance server. The signal source is a data center server, which sends data to the air conditioning intelligent operation and maintenance server through an Ethernet interface. The air conditioning intelligent operation and maintenance server consists of a ground server, intelligent operation and maintenance algorithms, and business platform software. The PHM system management platform software is deployed using a big data platform architecture.

[0112] The air conditioning unit's built-in sensors collect operational data from the refrigeration piping system and major electrical components. The intelligent operation and maintenance control module or air conditioning controller integrates the information collected by each sensor and transmits the data to the vehicle-mounted PHM host. During real-time data transmission, the data is sent to the ground data center server via the integrated vehicle-to-ground wireless communication network. The air conditioning intelligent operation and maintenance server retrieves and processes the data from the data center server, then returns the processed results to the data center server. The data center server then sends the processed results to a webpage for the owner's reference and can also send data to the manufacturer's data center for collection via an external network port.

[0113] The air conditioning intelligent operation and maintenance server is equipped with a data input module for the data interface, which receives and parses data output from the data center server according to the communication protocol. It also sends the real-time inference results of the intelligent operation and maintenance algorithm.

[0114] The intelligent air conditioning operation and maintenance server also includes a data storage module for designing Hadoop-based databases and file storage systems for different types of data (raw data, cleaned basic data, and feature data and analysis results processed by algorithms). It provides database interfaces, unified query interfaces, algorithm analysis interfaces, and upper-layer application interfaces.

[0115] The intelligent air conditioning operation and maintenance server also includes a system configuration module with sub-modules for user configuration, log management, general configuration, and system storage resource monitoring. The user configuration module is responsible for user authentication and function authorization, and also includes user and permission management functions. The log management module records key information about system operation, including business logs and software operation logs. The general configuration module handles date and time, interface IP, and storage settings.

[0116] This invention discloses application functions for implementing a PHM system management platform, including: a homepage dashboard function for homepage design in both large screen and PC modes, used for comprehensive information display of air conditioner groups, and capable of displaying data status such as model quantity, normal / fault information, etc.; a real-time data display function for real-time monitoring of the status of each air conditioner, displaying dynamic data change curves, and allowing selection of monitoring objects based on information such as model and serial number; historical data query: historical operating data of air conditioners can be retrieved by time, model, etc., stored in the platform; data playback can be performed on single raw operating data; a fault alarm function for real-time display of alarm information issued by the fault alarm algorithm deployed by the air conditioners, and the corresponding alarm list can be retrieved by information such as time, model, and fault alarm type; and a statistical report function for statistical analysis and display of the historical database and the fault database.

[0117] The air conditioning intelligent operation and maintenance server also has an algorithm management shell module, which provides model algorithm management software to uniformly manage the algorithms deployed in the system, and provides an environment for the unified deployment and expansion of algorithms according to the specified protocol format. It also provides sub-health early warning information management function, which can uniformly manage, add, delete, modify, query and export early warning information.

[0118] The air conditioning intelligent operation and maintenance server also has an intelligent operation and maintenance algorithm module, which is used to implement a fault diagnosis algorithm based on business rules based on the faults and judgment criteria given in the air conditioning expert diagnosis system model.

[0119] Furthermore, the PHM system presents all the applications provided by the platform in a B / S format, and the client applications are implemented through a web browser.

[0120] Furthermore, the PHM system management platform should have the function of customizing fault data processing rules, supporting the configuration of mathematical operation rules for variables in a graphical manner to generate the final result of judging whether the equipment is faulty. Users define diagnostic rules by dragging and dropping. The parameters related to the rules come from the signals contained in the vehicle data protocol, and can perform arithmetic operations, Boolean operations, and aggregation calculations (such as summation, averaging, comparison, etc.).

[0121] Furthermore, the PHM system management platform enables interaction between air conditioning data and digital twin model data. The digital twin model can be displayed independently, and it also has a partial component explosion function. Clicking on a component with the mouse will pop up the corresponding data window. The digital twin model supports displaying refrigerant flow and fan operation animations.

[0122] This invention discloses a PHM (Prognostics and Health Management) system management platform for rail transit air conditioning. Through the construction of a PHM data model for the air conditioning system and the design of its system architecture and functions, the PHM system management platform achieves status detection, real-time monitoring, data query, fault alarm, and statistical reporting functions. The PHM management platform of this invention applies a digital twin model to intuitively and accurately locate faulty components and provides maintenance suggestions through an expert diagnostic system model.

[0123] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A PHM system platform for rail transit air conditioning, characterized in that, include: The intelligent operation and maintenance control module connects to the sensors of the refrigeration piping system in the air conditioning unit to acquire the operating information of the refrigeration piping system and send the acquired operating information of the refrigeration piping system to the air conditioning controller. The air conditioning controller is connected to the sensors of the main electrical components of the air conditioning unit to obtain the operating information of the main electrical components of the air conditioning unit, and integrates the operating information of the refrigeration piping system and the operating information of the main electrical components to form integrated information, and transmits the integrated information to the vehicle PHM host. The vehicle-mounted PHM host is used to acquire the integrated information and transmit it to the data center server in real time via a vehicle-to-ground wireless communication network. A data center server stores the acquired integrated information; The system acquires the air conditioning unit analysis data and results sent by the air conditioning intelligent operation and maintenance server, and sends the air conditioning unit analysis data and results to the owner's monitoring center and the manufacturer's data center. An intelligent air conditioning operation and maintenance server is used to read the integrated information from the data center server, process the acquired integrated information to obtain air conditioning unit analysis data and analysis results, and transmit the air conditioning unit analysis data and analysis results to the data center server. The owner monitoring center is used to obtain air conditioning unit analysis data and results from the data center server and to visualize the air conditioning unit analysis data and results; and, The manufacturer's data center is used to obtain air conditioning unit analysis data and results from the data center server, visualize the air conditioning unit analysis data and results, and save the air conditioning unit analysis data and results.

2. The PHM system platform for rail transit air conditioning according to claim 1, characterized in that: The sensors in the refrigeration piping system include a return air temperature and humidity sensor, a fresh air temperature and humidity sensor, a system supply air temperature and humidity sensor, a system high-pressure sensor, a system low-pressure sensor, a compressor suction temperature sensor, a compressor discharge temperature sensor, an evaporator temperature sensor, a condenser temperature sensor, and a filter differential pressure sensor. The operating information of the refrigeration piping system includes return air temperature, return air humidity, fresh air temperature, fresh air humidity, system supply air temperature, system supply air humidity, system high pressure value, system low pressure value, compressor suction temperature, compressor discharge temperature, evaporator temperature, condenser temperature, and filter pressure difference. The sensors for the main electrical components include compressor current transformers, evaporator current transformers, condenser current transformers, electric heating current transformers, and unit current transformers. The operating information of the main electrical components includes the three-phase current values ​​of the compressor, the blower, the condenser, the electric heater, and the unit.

3. The PHM system platform for rail transit air conditioning according to claim 2, characterized in that: The analysis data and results of the air conditioning unit include status monitoring, fault alarms, and status early warnings.

4. The PHM system platform for rail transit air conditioning according to claim 3, characterized in that: The status monitoring includes return air temperature monitoring, return air humidity monitoring, fresh air temperature monitoring, fresh air humidity monitoring, supply air temperature monitoring, supply air humidity monitoring, system high pressure monitoring, system low pressure monitoring, compressor suction temperature monitoring, compressor discharge temperature monitoring, evaporator temperature monitoring, condenser temperature monitoring, filter differential pressure monitoring, compressor three-phase current monitoring, supply fan three-phase current monitoring, condenser fan three-phase current monitoring, electric heating three-phase current monitoring, and unit three-phase current monitoring; The fault alarms include: clogged fresh air filter, clogged return air filter, refrigerant leak, excessively high compressor discharge temperature, compressor malfunction, evaporator fan self-protection fault, evaporator fan malfunction, condenser fan self-protection fault, condenser fan malfunction, return air valve malfunction, fresh air valve malfunction, fresh air temperature and humidity sensor malfunction, return air temperature and humidity sensor malfunction, high pressure sensor malfunction, low pressure sensor malfunction, temperature sensor malfunction, current transformer malfunction, differential pressure sensor malfunction, clogged condenser, and clogged evaporator. The status warnings include compressor maintenance, evaporator fan maintenance, condenser fan maintenance, electric heating maintenance, and evaporator and condenser maintenance.

5. The PHM system platform for rail transit air conditioning according to claim 4, characterized in that: The air conditioning intelligent operation and maintenance server processes the integrated information according to the fault diagnosis strategy to obtain fault information; Fault diagnosis strategies include: if the fresh air filter pressure differential value is higher than the set fresh air filter pressure differential threshold, it is diagnosed as a clogged fresh air filter; If the return air filter pressure differential value is higher than the set return air filter pressure differential threshold, it is diagnosed as a clogged return air filter. The set pressure threshold for the refrigeration piping was diagnosed as a refrigerant leak fault. If the compressor discharge temperature is higher than the set compressor discharge temperature threshold, it is diagnosed as a compressor discharge temperature too high fault. If the compressor current exceeds the set compressor current threshold range, it is diagnosed as a compressor malfunction. If the evaporator fan current value is higher than the set evaporator fan current threshold range, it is diagnosed as an evaporator fan malfunction. If the condenser fan current value is higher than the set condenser fan current threshold range, it is diagnosed as a condenser fan malfunction. If the fresh air temperature and humidity exceed the set threshold of the fresh air temperature and humidity sensor or there is no feedback, the fresh air temperature and humidity sensor is diagnosed as faulty. If the return air temperature and humidity exceed the set threshold of the return air temperature and humidity sensor or there is no feedback, the diagnosis is a fault in the return air temperature and humidity sensor. If the system high pressure value exceeds the set system high pressure threshold range or there is no feedback, the diagnosis is a high pressure sensor malfunction. If the system low pressure value exceeds the set system low pressure threshold range or there is no feedback, the diagnosis is a low pressure sensor malfunction. If the system supply air temperature and humidity values ​​exceed the set threshold of the system supply air temperature and humidity sensor or there is no feedback, the system supply air temperature and humidity sensor is diagnosed as faulty. If the compressor suction temperature exceeds the set compressor suction temperature threshold range or there is no feedback, the diagnosis is a compressor suction temperature sensor malfunction. If the compressor discharge temperature exceeds the set compressor discharge temperature threshold range or there is no feedback, the diagnosis is a compressor discharge temperature sensor malfunction. If the evaporator temperature value exceeds the set evaporator temperature threshold range or there is no feedback, the diagnosis is a faulty evaporator temperature sensor. If the condenser temperature value exceeds the set condenser temperature threshold range or there is no feedback, the diagnosis is a condenser temperature sensor malfunction. If the compressor current value exceeds the set compressor current threshold range or there is no feedback, the diagnosis is a compressor current transformer fault. If the evaporator fan current value exceeds the set evaporator fan current threshold range or there is no feedback, the diagnosis is a fault in the evaporator fan current transformer. If the condenser fan current value exceeds the set condenser fan current threshold range or there is no feedback, the diagnosis is a condenser fan current transformer fault. If the electric heating current value exceeds the set electric heating current threshold range or there is no feedback, it is diagnosed as a fault in the electric heating current transformer. If the unit current value exceeds the set unit current threshold range or there is no feedback, it is diagnosed as a fault in the unit current transformer. If the filter differential pressure value exceeds the set filter differential pressure threshold range or there is no feedback, the filter differential pressure sensor is diagnosed as faulty. If the refrigeration pipe pressure is higher than the set refrigeration pipe threshold range, the fresh air temperature is within the set fresh air temperature threshold range, and the condenser fan current is within the set condenser fan current threshold range, the condenser is diagnosed as being clogged. If the refrigeration pipe pressure is below the set refrigeration pipe threshold range, the evaporator fan current is within the set evaporator fan current threshold range, and there is no refrigerant leakage, the diagnosis is evaporator blockage.

6. The PHM system platform for rail transit air conditioning according to claim 5, characterized in that: The air conditioning intelligent operation and maintenance server processes the integrated information according to the status early warning strategy to obtain status early warning information; The status early warning strategy includes: obtaining the actual running time of the compressor, determining whether the actual running time of the compressor is higher than the designed running time of the compressor, and if so, determining it as a compressor maintenance early warning; Obtain the actual operating time of the evaporator fan, and determine whether the actual operating time of the evaporator fan is higher than the designed operating time of the evaporator fan. If so, it is determined to be an evaporator fan maintenance warning. Obtain the actual operating time of the condenser fan and determine whether the actual operating time of the condenser fan is higher than the designed operating time of the condenser fan. If so, it is determined as a condenser fan maintenance warning. Get the air supply temperature value within a set time period, and determine whether the air supply temperature within the set time period is lower than the set air supply temperature threshold. If so, it is determined to be an electric heating maintenance warning. Obtain the supply air temperature value within a set time period, and determine whether the supply air temperature within the set time period is higher than the set supply air temperature threshold. If so, determine it as an evaporator and condenser maintenance warning.

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