Circulating cooling fault early warning system of dehumidification air conditioner system

Abstract

The invention relates to the field of dehumidification air conditioners, and particularly discloses a circulation cooling fault early warning system of a dehumidification air conditioner system. According to the circulating cooling fault early warning system of the dehumidification air conditioner system, the parameter monitoring part and the fault diagnosis part are arranged to form the circulating cooling fault early warning system of the dehumidification air conditioner system, the parameter monitoring part obtains unit operation data such as pressure and temperature through the sensor arranged on the dehumidification air conditioner unit, and the fault diagnosis part analyzes and judges the collected unit operation data; the fault type of the dehumidification air conditioning unit is judged, the fault stage is judged, unit operation and maintenance personnel can quickly judge when and where the dehumidification air conditioning unit breaks down according to the analysis result of the fault diagnosis part, then equipment faults are efficiently and accurately eliminated in time, the equipment fault finding time can be effectively shortened, and the fault finding efficiency is improved. The overall downtime of the equipment can be shortened as much as possible, and the stability of the operation function of the equipment is effectively guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of dehumidifying air conditioners, and particularly relates to a fault warning system for the circulating cooling of a dehumidifying air conditioner system. Background Art

[0002] Protective engineering is of great strategic importance. The protective engineering is buried deep underground, and its operation highly depends on the effective guarantee of the air environment. The ventilation and air conditioning system is called the "lifeline" of the protective engineering. Ensuring the reliable operation of the ventilation and air conditioning system is the primary task of engineering operation and maintenance guarantee. The dehumidifying air conditioner is a key air conditioning device in the ventilation and air conditioning system, which can perform air treatment functions such as ventilation, dehumidification, humidification, and heating according to the internal thermal and humid environment requirements of the project. It can be regarded as the core component in the "lifeline". The stable operation of the unit is the premise for the stability of the "lifeline". Among them, the shell-and-tube condenser of the unit refrigeration system is an important component for realizing air cooling.

[0003] The condenser in the dehumidifying air conditioner is huge in volume and complex in system. High-pressure and low-pressure threshold parameters have been set before leaving the factory. Although the equipment manufacturer has configured relevant protection devices, their main purpose is to stop the machine in time to protect the equipment from damage or safety accidents when the equipment fails. However, for project guarantee, once the equipment fails and stops, it will seriously affect the air environment inside the project. At the same time, if a failure occurs during operation, it usually requires the equipment manufacturer to send professional personnel to the site for troubleshooting and repair. Not only does the repair take a long time, but in severe cases, it will also affect the completion of the wartime guarantee task. Therefore, carrying out research on fault warning and autonomous repair of dehumidifying air conditioner units to avoid or reduce the sudden shutdown of the units due to faults and other reasons, and to ensure the stable operation of the units and the ventilation and air conditioning system, is of great significance for improving the combat effectiveness of protective engineering.

[0004] To ensure the stable operation of the unit and the ventilation and air-conditioning system, the structure of the dehumidifying air-conditioning system is improved. A new water pump and a detachable plate heat exchanger are added. A primary closed pure water circulation is composed of a shell-and-tube condenser, a water pump 1, and a detachable plate heat exchanger. Using pure water for closed circulation can effectively avoid the formation of scale in the shell-and-tube condenser, and further avoid equipment corrosion caused by scale. A secondary open mechanical water circulation is composed of a detachable plate heat exchanger, a water pump 2, and an air-conditioning water reservoir, which is used to take out the heat generated by the primary closed pure water circulation. Although scale will be generated in the detachable plate heat exchanger, the operator removes the scale in the detachable plate heat exchanger during equipment maintenance to maintain the heat dissipation efficiency of the cooling water circulation system. Therefore, it is very important to determine the maintenance time of the equipment. If only relying on maintenance personnel to judge faults by manually checking the operation parameters of the dehumidifying air-conditioning unit, not only is the judgment process very dependent on the professionalism of the maintenance personnel, but also the maintenance personnel need to frequently travel back and forth between the equipment rooms of the dehumidifying air-conditioning unit, which is rather troublesome, and it is impossible to detect equipment faults in time, and the stable operation of the dehumidifying air-conditioning unit cannot be guaranteed. Summary of the Invention

[0005] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a circulating cooling fault warning system for a dehumidifying air-conditioning system to solve the problems that the traditional manual inspection and maintenance method cannot detect the operation faults of the dehumidifying air-conditioning unit in time and cannot guarantee the stable operation of the dehumidifying air-conditioning unit.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A circulating cooling fault warning system for a dehumidifying air-conditioning system, comprising:

[0008] A parameter monitoring unit, used to monitor and obtain the operation parameter signals of the dehumidifying air-conditioning unit, and the operation parameter signals include condensation pressure, suction pressure, condensation temperature, suction temperature, inlet and outlet water temperatures of the cooling water, and compressor phase sequence current;

[0009] A fault diagnosis unit, used to receive the operation parameter signals of the dehumidifying air-conditioning unit obtained by the parameter monitoring unit, judge the fault type and the fault stage of the dehumidifying air-conditioning unit according to the operation parameter signals, and send a warning signal when a fault occurs in the dehumidifying air-conditioning unit.

[0010] Preferably, the parameter monitoring unit includes:

[0011] A sensor module, arranged on the dehumidifying air-conditioning unit, used to sense and generate the operation parameter signals of the dehumidifying air-conditioning unit;

[0012] A PLC data acquisition module, connected to the sensor module through an adapter, used to receive the operation parameter signals generated by the sensor module;

[0013] an industrial computer connected to the PLC data acquisition module, configured to process the operating parameter signal received by the PLC data acquisition module and generate corresponding operating parameter values;

[0014] The display control module is connected to the industrial computer and is used to display the corresponding operating parameter values generated by the industrial computer.

[0015] Preferably, the fault diagnosis module includes:

[0016] a communication module, configured to transmit the operating parameter signal of the dehumidification air-conditioning unit acquired by the parameter monitoring unit;

[0017] The bottom data real-time acquisition module has a built-in expert knowledge database and receives the operating parameter signal of the dehumidification air conditioning unit obtained by the parameter monitoring unit through the communication module;

[0018] an application middle-level module for retrieving and analyzing the operating parameter signals of the dehumidification air-conditioning unit and the data in the expert knowledge database, determining the fault type and the stage of the fault, and issuing a warning signal when a fault occurs in the dehumidification air-conditioning unit;

[0019] Human-computer interaction interface, used to remotely display system operating status and fault type.

[0020] Preferably, the display control module generates a control signal according to the operation of the operation and maintenance personnel, and the industrial computer transmits the control signal to the dehumidification air-conditioning unit to realize control.

[0021] Preferably, the data transmitted by the communication module also includes control signals and software system signals.

[0022] Preferably, the application middle-level module includes:

[0023] a technical evaluation module, configured to compare and analyze the operating parameter signal data of the dehumidification air conditioning unit with the data in the expert knowledge database to generate comparison result data;

[0024] a fault diagnosis module, configured to determine the fault type and the stage of the dehumidification air conditioning unit based on the comparison result data, generate a fault type signal and a fault stage signal, and issue a warning signal starting from the initial stage of the fault;

[0025] The information management module is used to generate an operation and maintenance management task according to the fault type signal and the fault stage signal.

[0026] Preferably, the human-computer interaction interface is embedded and integrated with the existing Windows operating platform of the dehumidification air-conditioning unit.

[0027] Preferably, the fault diagnosis unit includes a fault diagnosis algorithm for judging the fault type and the stage where the fault occurs of the dehumidifying air conditioner unit according to the operation parameter signal. The fault diagnosis algorithm is a characteristic tree algorithm, and the steps for establishing the characteristic tree algorithm are as follows:

[0028] Regarding condenser breakage and refrigerant leakage as the fault types of the dehumidifying air conditioner unit;

[0029] Collect the operation data of the dehumidifying air conditioner unit under normal operation and various fault types. The operation data includes temperature, pressure, and current;

[0030] Extract the characteristic quantities that can reflect the operation state and fault characteristics of the dehumidifying air conditioner unit from the collected operation data. The characteristic quantities include high-pressure pressure alarm value, low-pressure pressure alarm value, condensation temperature alarm value, evaporation temperature alarm value, return air temperature alarm value, primary water inlet alarm value, primary water outlet alarm value, secondary water inlet alarm value, secondary water outlet alarm value, phase A current alarm value, phase B current alarm value, and phase C current alarm value;

[0031] Regarding the overall fault of the dehumidifying air conditioner unit as the root node, regarding condenser breakage and refrigerant leakage as the second-layer sub-nodes, and regarding the characteristic quantities as the third-layer sub-nodes, establish the node relationships between the root node and the second-layer sub-nodes and between the second-layer sub-nodes and the third-layer sub-nodes to determine the characteristic tree structure;

[0032] Use the existing fault data and normal data of the dehumidifying air conditioner unit to train the characteristic tree, and use the new test data to verify and evaluate the constructed characteristic tree to obtain the characteristic tree algorithm for the circulating cooling fault warning system of the dehumidifying air conditioner system.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0034] The present invention forms a circulating cooling fault warning system for the dehumidifying air conditioner system by setting a parameter monitoring unit and a fault diagnosis unit. The parameter monitoring unit obtains the operation data of the unit such as pressure and temperature through the sensors arranged on the dehumidifying air conditioner unit. The fault diagnosis unit analyzes and judges the collected operation data of the unit, judges the fault type of the dehumidifying air conditioner unit, and judges the stage where the fault occurs. The unit operation and maintenance personnel can quickly judge when and where the dehumidifying air conditioner unit has a fault according to the analysis result of the fault diagnosis unit, and then accurately eliminate the equipment fault in a timely and efficient manner. It can not only effectively reduce the equipment fault search time, but also can shorten the overall equipment shutdown time as much as possible, and effectively ensure the stability of the equipment operation function. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic structural diagram of the primary closed pure water circulation and the secondary open mechanical water circulation of the present invention;

[0036] Figure 2 The structural block diagram of a circulating cooling fault warning system for a dehumidifying air conditioner system disclosed by the present invention;

[0037] Figure 3 The software and hardware structure diagram of a circulating cooling fault warning system for a dehumidifying air conditioner system disclosed by the present invention. Specific embodiments

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0039] Embodiment 1:

[0040] Please refer to Figure 1 - Figure 3 As shown, the structure of the old dehumidifying air conditioner unit composed of a shell-and-tube condenser, a water pump, and an air conditioner water reservoir is transformed. A detachable plate heat exchanger and a water pump are added to form a new dehumidifying air conditioner unit composed of a primary closed pure water circulation and a secondary open mechanical water circulation. The primary closed pure water circulation consists of a shell-and-tube condenser, a water pump 1, and a detachable plate heat exchanger. The secondary open mechanical water circulation consists of a detachable plate heat exchanger, a water pump 2, and an air conditioner water reservoir. The primary closed pure water circulation takes out the heat in the shell-and-tube condenser through the circulating pure water, and then exchanges and takes out the heat of the pure water through the detachable plate heat exchanger, avoiding the generation of scale in the shell-and-tube condenser, and the detachable plate heat exchanger can be disassembled to remove the scale therein, maintaining the overall stable operation of the system. A circulating cooling fault warning system for a dehumidifying air conditioner system is set up to monitor and judge whether the overall system fails.

[0041] A circulating cooling fault warning system for a dehumidifying air conditioner system includes:

[0042] A parameter monitoring unit for monitoring and obtaining the operation parameter signals of the dehumidifying air conditioner unit, where the operation parameter signals include condensation pressure, suction pressure, condensation temperature, suction temperature, inlet and outlet water temperatures of cooling water, and compressor phase sequence current;

[0043] A fault diagnosis unit for receiving the operation parameter signals of the dehumidifying air conditioner unit obtained by the parameter monitoring unit, judging the fault type and the stage where the fault occurs according to the operation parameter signals, and sending out a warning signal when the dehumidifying air conditioner unit fails.

[0044] As can be seen from the above, a dehumidifying air conditioner system circulating cooling fault warning system is composed of a parameter monitoring unit and a fault diagnosis unit. The parameter monitoring unit obtains the operating data of the unit such as pressure and temperature through sensors arranged on the dehumidifying air conditioner unit. The fault diagnosis unit analyzes and judges the collected operating data of the unit, judges the fault type of the dehumidifying air conditioner unit, and judges the stage where the fault is located. The unit operation and maintenance personnel can quickly judge when and where the dehumidifying air conditioner unit has a fault according to the analysis result of the fault diagnosis unit, and then accurately eliminate the equipment fault in a timely and efficient manner. This can not only effectively reduce the time for finding equipment faults, but also shorten the overall downtime of the equipment as much as possible, and effectively ensure the stability of the equipment operation function.

[0045] Please refer to Figure 2 - Figure 3 As shown in the figure, the parameter monitoring unit includes:

[0046] A sensor module, which is arranged on the dehumidifying air conditioner unit and is used to sense and generate the operating parameter signals of the dehumidifying air conditioner unit. The operating parameter signals that the sensor can collect include high-pressure pressure value, low-pressure pressure value, condensation temperature value, evaporation temperature value, return air temperature value, primary inlet water temperature value, primary outlet water temperature value, secondary inlet water temperature value, secondary outlet water temperature value, phase A current value, phase B current value, and phase C current value;

[0047] A PLC data acquisition module, which is connected to the sensor module through an adapter and is used to receive the operating parameter signals generated by the sensor module;

[0048] An industrial control computer, which is connected to the PLC data acquisition module and is used to process the operating parameter signals received by the PLC data acquisition module and generate corresponding operating parameter values;

[0049] A display control module, which is connected to the industrial control computer and is used to display the corresponding operating parameter values generated by the industrial control computer.

[0050] As can be seen from the above, the PLC data acquisition module can read the operating parameter signals collected by the sensor module, then the industrial control computer converts the operating parameter signals collected by the PLC data acquisition module into operating parameter values, and finally the display control module displays the operating parameter values.

[0051] Please refer to Figure 2 - Figure 3 As shown in the figure, the fault diagnosis module includes:

[0052] A communication module, which is used to transmit the operating parameter signals of the dehumidifying air conditioner unit obtained by the parameter monitoring unit, including control signals and software system signals;

[0053] The underlying data real-time acquisition module is built-in with an expert knowledge database and receives the operation parameter signals of the dehumidifying air conditioner unit obtained by the parameter monitoring unit through the communication module;

[0054] The middle-layer module of the application program is used to retrieve and analyze the operation parameter signals of the dehumidifying air conditioner unit and the data in the expert knowledge database, judge the fault type and the stage where the fault occurs, and send out a warning signal when a fault occurs in the dehumidifying air conditioner unit;

[0055] The human-machine interaction interface is used to remotely display the system operation status and the fault type. The human-machine interaction interface is integrated with the existing Windows operation platform of the dehumidifying air conditioner unit in an embedded manner.

[0056] The fault diagnosis module is the software part. The communication module receives the operation parameter values processed by the industrial control computer. The middle-layer module of the application program compares the received operation parameter values with the data in the expert knowledge database of the underlying data real-time acquisition module, analyzes and judges the fault type and the stage where the fault occurs in the equipment system, and displays it through the human-machine interaction interface.

[0057] The display control module generates a control signal according to the operation of the operation and maintenance personnel, and the industrial control computer transmits the control signal to the dehumidifying air conditioner unit to achieve control.

[0058] The middle-layer module of the application program includes:

[0059] The technical evaluation module is used to compare and analyze the operation parameter signal data of the dehumidifying air conditioner unit and the data in the expert knowledge database, and generate comparison result data;

[0060] The fault diagnosis module is used to judge the fault type and the stage where the fault occurs in the dehumidifying air conditioner unit according to the comparison result data, generate a fault type signal and a fault stage signal, and send out a warning signal starting from the initial stage of the fault;

[0061] The information management module is used to generate an operation and maintenance management task according to the fault type signal and the fault stage signal.

[0062] As can be seen from the above, the technical evaluation module compares the operation parameter signal data of the dehumidifying air conditioner unit with the data in the expert knowledge database to generate comparison result data. The fault diagnosis module judges the fault type and the stage where the fault occurs in the dehumidifying air conditioner unit according to the comparison result data, generates a fault type signal and a fault stage signal. Finally, the information management module generates an operation and maintenance management task according to the fault type signal and the fault stage signal, and the operation and maintenance personnel maintain and repair the equipment system according to the operation and maintenance management task.

[0063] Embodiment 2:

[0064] The technical features of this embodiment that are different from those of Embodiment 1 are as follows:

[0065] The fault diagnosis unit includes a fault diagnosis algorithm for judging the fault type and the stage where the fault occurs of the dehumidifying air conditioner unit according to the operating parameter signals. The fault diagnosis algorithm is a feature tree algorithm, and the steps for establishing the feature tree algorithm are as follows:

[0066] Take condenser breakage and refrigerant leakage as the fault types of the dehumidifying air conditioner unit;

[0067] Collect the operating data of the dehumidifying air conditioner unit under normal operation and various fault types. The operating data includes temperature, pressure, and current;

[0068] Extract the characteristic quantities that can reflect the operating state and fault characteristics of the dehumidifying air conditioner unit from the collected operating data. The characteristic quantities include high-pressure pressure alarm value, low-pressure pressure alarm value, condensation temperature alarm value, evaporation temperature alarm value, suction gas temperature alarm value, primary water inlet alarm value, primary water outlet alarm value, secondary water inlet alarm value, secondary water outlet alarm value, phase A current alarm value, phase B current alarm value, and phase C current alarm value;

[0069] Take the overall fault of the dehumidifying air conditioner unit as the root node, take condenser breakage and refrigerant leakage as the second-layer sub-nodes, and take the characteristic quantities as the third-layer sub-nodes. Establish the node relationships between the root node and the second-layer sub-nodes and between the second-layer sub-nodes and the third-layer sub-nodes to determine the feature tree structure;

[0070] Use the existing fault data and normal data of the dehumidifying air conditioner unit to train the feature tree, and use the new test data to verify and evaluate the constructed feature tree to obtain the feature tree algorithm for the circulating cooling fault warning system of the dehumidifying air conditioner system.

[0071] As can be seen from the above, when a fault occurs in the equipment, the fault diagnosis unit processes the collected operating data of the dehumidifying air conditioner unit according to the fault diagnosis algorithm, and then judges the fault of the dehumidifying air conditioner unit.

[0072] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not have to be directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0073] In the accompanying drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved. For other structures, reference can be made to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

Claims

1. A dehumidifying air conditioner system circulating cooling fault warning system, characterized in that, Including: A parameter monitoring unit for monitoring and acquiring the operation parameter signals of a dehumidifying air conditioner unit, where the operation parameter signals include condensation pressure, suction pressure, condensation temperature, suction temperature, inlet and outlet water temperatures of cooling water, and compressor phase sequence current; A fault diagnosis unit for receiving the operation parameter signals of the dehumidifying air conditioner unit acquired by the parameter monitoring unit, judging the fault type and the fault stage of the dehumidifying air conditioner unit according to the operation parameter signals, and sending out a warning signal when a fault occurs in the dehumidifying air conditioner unit.

2. The fault warning system for the circulating cooling of a dehumidifying air conditioner system according to claim 1, characterized in that: The parameter monitoring unit includes: A sensor module arranged on the dehumidifying air conditioner unit for sensing and generating the operation parameter signals of the dehumidifying air conditioner unit; A PLC data acquisition module connected to the sensor module through an adapter for receiving the operation parameter signals generated by the sensor module; An industrial control computer connected to the PLC data acquisition module for processing the operation parameter signals received by the PLC data acquisition module and generating corresponding operation parameter values; A display control module connected to the industrial control computer for displaying the corresponding operation parameter values generated by the industrial control computer.

3. The fault warning system for the circulating cooling of a dehumidifying air conditioner system according to claim 1, characterized in that: The fault diagnosis module includes: A communication module for transmitting the operation parameter signals of the dehumidifying air conditioner unit acquired by the parameter monitoring unit; A bottom-layer data real-time acquisition module with an expert knowledge database built in and receiving the operation parameter signals of the dehumidifying air conditioner unit acquired by the parameter monitoring unit through the communication module; An application program middle-layer module for retrieving and analyzing the operation parameter signals of the dehumidifying air conditioner unit and the data in the expert knowledge database, judging the fault type and the fault stage, and sending out a warning signal when a fault occurs in the dehumidifying air conditioner unit; A human-machine interaction interface for remotely displaying the system operation status and the fault type.

4. A dehumidifying air conditioner system circulating cooling fault warning system according to claim 2, characterized in that: The display control module generates a control signal according to the operation of the operation and maintenance personnel, and the industrial control computer transmits the control signal to the dehumidifying air conditioner unit to achieve control.

5. The dehumidifying air conditioner system circulation cooling fault warning system according to claim 3, characterized in that: The data transmitted by the communication module also includes a control signal and a software system signal.

6. A dehumidifying air conditioner system circulating cooling fault warning system according to claim 3, characterized in that: The application program middle-layer module includes: A technical evaluation module for comparing and analyzing the operation parameter signal data of the dehumidifying air conditioner unit and the data in the expert knowledge database to generate comparison result data; A fault diagnosis module for judging the fault type and the fault stage of the dehumidifying air conditioner unit according to the comparison result data, generating a fault type signal and a fault stage signal, and sending out a warning signal starting from the initial fault stage; An information management module for generating an operation and maintenance management task according to the fault type signal and the fault stage signal.

7. The warning system for the circulating cooling failure of a dehumidifying air conditioner system according to claim 3, characterized in that: The human-machine interaction interface is embedded and integrated with the existing Windows operation platform of the dehumidifying air conditioner unit.

8. The warning system for the circulating cooling failure of a dehumidifying air conditioner system according to claim 1, characterized in that: The fault diagnosis unit includes a fault diagnosis algorithm for judging the fault type and the fault stage of the dehumidifying air conditioner unit according to the operation parameter signals. The fault diagnosis algorithm is a feature tree algorithm, and the steps for establishing the feature tree algorithm are: Regarding condenser damage and refrigerant leakage as the fault types of the dehumidifying air conditioner unit; Collect the operation data of the dehumidifying air-conditioning unit under normal operation and various fault types, where the operation data includes temperature, pressure, and current; Extract the characteristic quantities from the collected operation data that can reflect the operation state and fault characteristics of the dehumidifying air-conditioning unit. The characteristic quantities include high-pressure pressure alarm value, low-pressure pressure alarm value, condensation temperature alarm value, evaporation temperature alarm value, suction temperature alarm value, primary water inlet alarm value, primary water outlet alarm value, secondary water inlet alarm value, secondary water outlet alarm value, phase A current alarm value, phase B current alarm value, and phase C current alarm value; Take the overall fault of the dehumidifying air-conditioning unit as the root node, take condensation damage and refrigerant leakage as the second-layer sub-nodes, and take the characteristic quantities as the third-layer sub-nodes. Establish the node relationships between the root node and the second-layer sub-nodes and between the second-layer sub-nodes and the third-layer sub-nodes to determine the characteristic tree structure; Use the existing fault data and normal data of the dehumidifying air-conditioning unit to train the characteristic tree, and use the new test data to verify and evaluate the constructed characteristic tree to obtain the characteristic tree algorithm for the circulating cooling fault warning system of the dehumidifying air-conditioning system.

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