Air-water cooling system of high-voltage frequency converter

Abstract

The invention belongs to the field of frequency converter cooling, and provides an air-water cooling system of a high-voltage frequency converter. Comprising an input module, a heat exchange module, a cooling medium circulation module, a temperature control module, an intelligent control module and a control module, wherein the input module is used for receiving heat energy of the high-voltage frequency converter; the heat exchange module is used for transmitting the heat energy received by the input module to a cooling medium; the cooling medium circulation module is used for circulating the cooling medium to maintain the cooling effect; according to the air-water cooling system of the high-voltage frequency converter, a multi-channel heat exchange design is adopted, more efficient heat energy transfer is achieved by optimizing fluid dynamics, and compared with a traditional single-channel or simple multi-channel design, the air-water cooling system of the high-voltage frequency converter has the advantages that the heat transfer efficiency is improved, and the cost is reduced. According to the system, heat can be distributed more evenly, turbulence loss of a cooling medium in the channel is reduced, and therefore the overall cooling efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the field of frequency converter cooling, in particular to an air-water cooling system for a high-voltage frequency converter. Background Art

[0002] With the development of industrial automation and power electronics technology, high-voltage inverters have become more and more common in various industrial applications. These devices generate a lot of heat during operation and require an effective cooling system to maintain their stable and safe operation. The existing cooling systems mainly include air cooling and water cooling, but each of them has some limitations.

[0003] Air cooling systems usually rely on air as a cooling medium, but in high heat loads and closed spaces, the cooling effect of air is limited and is easily affected by ambient temperature. In addition, air cooling systems may increase the risk of equipment corrosion in high humidity environments. Although water cooling systems provide higher heat transfer efficiency, traditional water cooling systems have some design deficiencies. For example, they may require complex piping layouts, which increases the difficulty of system installation and maintenance.

[0004] In the existing technology, the control of the cooling system is usually based on preset parameters and lacks adaptability to real-time operating conditions, which may lead to poor cooling effect or overcooling, thus affecting the overall energy efficiency and reliability of the system. In addition, the existing cooling system is also insufficient in terms of safety monitoring. Many systems lack effective fault detection and early warning mechanisms and cannot respond to potential operating risks in a timely manner, increasing the risk of equipment damage and production interruption.

[0005] Therefore, those skilled in the art have proposed an air-water cooling system for a high-voltage frequency converter to solve the problems raised in the background art. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides an air-water cooling system for a high-voltage frequency converter to solve the problems raised in the prior art.

[0007] An air-water cooling system for a high-voltage frequency converter includes an input module for receiving heat energy from the high-voltage frequency converter;

[0008] A heat exchange module, used to transfer the heat energy received by the input module to a cooling medium;

[0009] A cooling medium circulation module, used for circulating the cooling medium to maintain its cooling effect;

[0010] A temperature control module for monitoring and regulating the temperature of the cooling medium;

[0011] An intelligent control module is used to automatically adjust the flow rate of the cooling medium according to the data of the temperature control module;

[0012] Safety monitoring module, used to monitor the operating status of the entire system to ensure safe operation;

[0013] The amount of heat energy transferred in the intelligent control module adopts the following algorithm formula: Q = k·A·ΔT, where Q is the amount of heat energy transferred, k is the thermal conductivity coefficient, A is the heat exchange area, and ΔT is the temperature difference.

[0014] Preferably, the heat exchange module adopts a multi-channel design to improve the heat exchange efficiency by optimizing fluid dynamics. The heat exchange efficiency of the module is calculated as follows: Where η is the heat exchange efficiency, Q in is the heat energy entering the heat exchange module, Q out is the heat energy leaving the heat exchange module, and the thermal efficiency formula after multi-channel optimization is where η opt Represents the optimized heat exchange efficiency, where N channels is the number of channels, η base The basic heat exchange efficiency.

[0015] Preferably, the cooling medium circulation module includes a circulation pump for promoting the cooling medium to circulate in the system, and the outer surface of the pump is sprayed with corrosion-resistant paint, and the working efficiency of the pump conforms to the following formula, and this group of formulas takes into account the operating efficiency and fluid dynamics characteristics of the pump, where η pump Indicates the working efficiency of the pump, P out is the power output of the pump, P in is the power input to the pump, P loss is the power loss of the pump during operation, V flow Represents the volume flow rate of the fluid, P electrical Indicates the electrical power consumed by the pump.

[0016] Preferably, the temperature control module includes at least one temperature sensor for real-time monitoring of the temperature of the cooling medium. The data acquisition frequency of the sensor is determined by the following formula: f sample Indicates the data collection frequency, T response is the system response time. If the dynamic response requirements of the system are taken into account, the data acquisition frequency can also be determined by the following formula: sample =2·f system , where f system is the operating frequency of the system, ensuring that the sampling frequency is at least twice the operating frequency of the system to satisfy the Nyquist sampling theorem.

[0017] Preferably, the data of the temperature sensor is transmitted to the intelligent control module via wireless transmission, and the transmission rate thereof conforms to the following formula: Where Rtrans Indicates the transmission rate, L dota is the amount of data transmitted, T trans is the transmission time, N packets is the number of packets, R link The reliability of the wireless link.

[0018] Preferably, the intelligent control module automatically adjusts the speed of the pump according to the data of the temperature sensor to optimize the cooling effect, and the adjustment strategy is guided by the following formula: where ω pump represents the regulated pump speed, ω base is the basic speed, k temp is the temperature regulation coefficient, T set is the set temperature, T measured is the actual measured temperature, k damp represents the damping coefficient, is the temperature change rate, which is used to suppress overshoot and oscillation of the system.

[0019] Preferably, the security monitoring module includes a fault detection mechanism for timely detecting and handling system anomalies. The sensitivity of fault detection is further defined by the following formula, taking into account the fault tolerance of the system and the severity of the fault, Among them, S fault represents the sensitivity of fault detection, T measured is the actual measured temperature, T set is the set temperature, k severity is the fault severity factor, S severity An indicator of the severity of the fault.

[0020] Preferably, the safety monitoring module can automatically record the time, type and processing result of the fault. The integrity of the fault record is further evaluated by the following formula, which takes into account the timeliness and accuracy of the fault record: C record Indicates the completeness of fault records, N recorded is the number of recorded faults, N total is the total number of failures, T accuracy is the accuracy time window of the record, T total is the total time window.

[0021] Preferably, the system further comprises a user interface, allowing the user to manually set the target temperature of the temperature control module, and the response time of the user interface is calculated by the following formula, T ui =T click -T response +k ui ·(T click -T last ), where Tui Represents the response time of the user interface, T click is the time point of the user's operation, T response The time it takes for the system to respond to user operations.

[0022] K ui is the user interface response coefficient, T last The time point of the last user operation.

[0023] Preferably, the user interface provides a real-time data display function, including the temperature, flow rate and pressure of the cooling medium, and the data update frequency is further determined by the following formula, taking into account the real-time nature of the data and the load of the system, f update Indicates the data update frequency, T update is the data update cycle, k loda is the system load factor, C system The computing power of the system.

[0024] Through the above technical solution,

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The air-water cooling system of the high-voltage inverter of the present invention adopts a multi-channel heat exchange design and realizes more efficient heat energy transfer by optimizing fluid dynamics. Compared with the traditional single-channel or simple multi-channel design, the system of the present invention can distribute heat more evenly and reduce the turbulent loss of the cooling medium in the channel, thereby improving the overall cooling efficiency. In addition, the intelligent control module dynamically adjusts the operating state of the pump according to the temperature data monitored in real time, avoids overcooling, further reduces energy consumption, and achieves energy-saving effects.

[0027] 2. The system of the present invention uses an advanced adaptive control algorithm to automatically adjust the flow and flow rate of the cooling medium according to the real-time monitored temperature data to adapt to different working conditions and environmental changes. This intelligent adjustment mechanism not only improves the adaptability of the system, but also enhances the stability of the system, ensuring that the best cooling effect can be maintained under various working conditions. At the same time, the dynamic response and damping control mechanism of the system effectively suppress overshoot and oscillation, further improving the reliability of the system.

[0028] 3. The security monitoring module of the present invention integrates a multi-level fault detection and early warning mechanism, which can monitor the operating status of the system in real time and respond quickly when an abnormality is detected. At the same time, the user interface provides a friendly operation interface and intuitive data display, allowing users to easily set and adjust system parameters. The addition of intelligent prompts and help functions as well as remote monitoring and control functions further enhances the user's interactive experience, making the system more user-friendly and easy to manage. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a system flow chart of the present invention; DETAILED DESCRIPTION

[0030] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] Embodiment 1: As shown in the attached Figure 1 As shown: The present invention provides an air-water cooling system for a high-voltage frequency converter, including an input module for receiving heat energy from a high-voltage frequency converter, which is designed to receive and preliminarily process heat from the high-voltage frequency converter, and improves the absorption efficiency and uniformity of heat energy through special heat conduction materials and structural design;

[0032] The heat exchange module is used to transfer the heat energy received by the input module to the cooling medium. It adopts a multi-channel design and achieves more efficient and uniform heat exchange between the heat energy and the cooling medium through the optimization of fluid dynamics. The channels of this module are designed to maximize the heat exchange efficiency and reduce the fluid resistance;

[0033] The cooling medium circulation module is used to circulate the cooling medium to maintain its cooling effect. It contains a high-efficiency pump and advanced circulation control strategy to ensure that the cooling medium circulates in the system at an optimal flow rate while reducing energy consumption and improving cooling effect;

[0034] The temperature control module is used to monitor and adjust the temperature of the cooling medium. It is equipped with a high-precision temperature sensor that can monitor the temperature changes of the cooling medium in real time and respond quickly through intelligent algorithms to maintain the system at the optimal operating temperature.

[0035] Intelligent control module, used to automatically adjust the flow rate of cooling medium according to the data of temperature control module, and automatically adjust the operating parameters of the pump in the module according to the temperature data provided by the temperature control module, so as to achieve precise flow control and energy efficiency optimization;

[0036] The safety monitoring module is used to monitor the operating status of the entire system to ensure safe operation. It integrates multiple fault detection mechanisms, can monitor the operating status of the system in real time, promptly discover and respond to potential safety issues, and ensure the stable operation of the system;

[0037] User interface, which provides an intuitive operation interface, allowing users to set temperature control parameters as needed, while displaying real-time system status and data, enhancing the user interaction experience;

[0038] Remote monitoring and control function allows users to remotely monitor system status through the network and perform necessary operations, improving the flexibility and manageability of the system;

[0039] The amount of heat energy transferred in the intelligent control module adopts the following algorithm formula: Q = k·A·ΔT, where Q is the amount of heat energy transferred, k is the thermal conductivity coefficient, A is the heat exchange area, and ΔT is the temperature difference.

[0040] As can be seen from the above, this system achieves efficient absorption and uniform distribution of heat generated by high-voltage inverters through its innovative multi-module collaborative working mechanism. The system adopts a multi-channel heat exchange design, combined with an intelligent control algorithm, which not only improves cooling efficiency and energy saving, but also enhances the adaptability, stability and safety of the system. In addition, the intuitive operation of the user interface and the integration of remote monitoring functions further optimize the user experience and the convenience of management, ensuring that the high-voltage inverter can operate stably under various working conditions.

[0041] Embodiment 2: As shown in the attached Figure 1 As shown: This embodiment is basically the same as the previous embodiment, except that the heat exchange module adopts a multi-channel design and improves the heat exchange efficiency by optimizing fluid dynamics. The formula for the heat exchange efficiency of this module is: Where η is the heat exchange efficiency, Q in is the heat energy entering the heat exchange module, Q out is the heat energy leaving the heat exchange module, and the thermal efficiency formula after multi-channel optimization is where η opt Represents the optimized heat exchange efficiency, where N channels is the number of channels, η base For basic heat exchange efficiency, the multi-channel design of the heat exchange module not only optimizes fluid dynamics, but also improves heat exchange efficiency by increasing the number of channels. The multiple channels are set to ensure that the cooling medium can effectively absorb and transfer heat when passing through. In addition, the design of the module allows for uniform distribution of thermal energy, reducing the formation of hot spots, thereby extending the service life of the equipment.

[0042] Furthermore, the cooling medium circulation module includes a circulation pump for promoting the circulation of the cooling medium in the system, and the outer surface of the pump is sprayed with corrosion-resistant paint, and the working efficiency of the pump conforms to the following formula, and this group of formulas takes into account the operating efficiency and fluid dynamics characteristics of the pump, where η pump Indicates the working efficiency of the pump, P out is the power output of the pump, P in is the power input to the pump, P loss is the power loss of the pump during operation, V flow Represents the volume flow rate of the fluid, P electricalIndicates the electrical power consumed by the pump. The pump in the cooling medium circulation module is not only highly efficient, but also the corrosion-resistant paint sprayed on its outer surface can protect the pump from chemical corrosion and wear, ensuring the reliability and durability of the pump in various environments. The pump efficiency formula further considers the operating efficiency and fluid dynamics of the pump, ensuring that the pump can maintain the lowest energy consumption while providing maximum flow.

[0043] Preferably, the temperature control module includes at least one temperature sensor for real-time monitoring of the temperature of the cooling medium. The data acquisition frequency of the sensor is determined by the following formula: f sample Indicates the data collection frequency, T response is the system response time. If the dynamic response requirements of the system are taken into account, the data acquisition frequency can also be determined by the following formula: sample =2·f system , where f system The sampling frequency is at least twice the operating frequency of the system to meet the Nyquist sampling theorem. At least one temperature sensor in the temperature control module has high precision and fast response capabilities and can monitor the temperature changes of the cooling medium in real time. The data acquisition frequency of the sensor is optimized according to the system response time and operating frequency to ensure the accuracy and real-time nature of the data and meet the requirements of the Nyquist sampling theorem.

[0044] Furthermore, the data of the temperature sensor is transmitted to the intelligent control module via wireless, and its transmission rate conforms to the following formula: Where R trans Indicates the transmission rate, L dota is the amount of data transmitted, T trans is the transmission time, N packets is the number of packets, R link To ensure the reliability of the wireless link, the data of the temperature sensor is transmitted wirelessly to the intelligent control module. This wireless transmission method not only reduces the complexity of wiring, but also improves the flexibility and reliability of the system. The formula of the transmission rate takes into account the amount of data, transmission time and number of data packets, ensuring the efficiency and stability of data transmission.

[0045] Embodiment 3: As shown in the attached Figure 1 As shown: Based on the first embodiment, the intelligent control module automatically adjusts the speed of the pump according to the data of the temperature sensor to optimize the cooling effect. The adjustment strategy is guided by the following formula: where ω pump represents the regulated pump speed, ω base is the basic speed, k temp is the temperature regulation coefficient, T set is the set temperature, T measuredis the actual measured temperature, k damp represents the damping coefficient, The intelligent control module automatically adjusts the pump speed based on the temperature sensor data using advanced algorithms to achieve the best cooling effect. The adjustment strategy takes into account the basic speed, temperature adjustment coefficient, set temperature and actual measured temperature, as well as the damping coefficient and temperature change rate, effectively suppressing the overshoot and oscillation of the system. The intelligent control module uses a precise adjustment algorithm to automatically adjust the pump speed based on the real-time data of the temperature sensor to achieve dynamic optimization of the cooling medium flow rate. The adjustment strategy formula integrates multiple factors such as temperature adjustment coefficient, damping coefficient and temperature change rate, effectively suppressing the overshoot and oscillation of the system, and ensuring the accuracy and stability of the cooling effect.

[0046] Preferably, the security monitoring module includes a fault detection mechanism for timely detecting and handling system anomalies. The sensitivity of fault detection is further defined by the following formula, taking into account the fault tolerance of the system and the severity of the fault, Among them, S fault represents the sensitivity of fault detection, T measured is the actual measured temperature, T set is the set temperature, k severity is the fault severity factor, S severity As an indicator of the severity of the fault, the fault detection mechanism of the safety monitoring module can monitor the operating status of the system in real time, detect and handle abnormal situations in a timely manner, and the sensitivity formula of fault detection takes into account the system's fault tolerance and the severity of the fault, ensuring that the system can maintain stable operation under various circumstances.

[0047] Furthermore, the safety monitoring module can automatically record the time, type and processing results of the fault. The completeness of the fault record is further evaluated by the following formula, which takes into account the timeliness and accuracy of the fault record, C record Indicates the completeness of fault records, N recorded is the number of recorded faults, N total is the total number of failures, T accuracy is the accuracy time window of the record, T total For the total time window, the safety monitoring module can not only automatically record the occurrence of faults, but also record the time, type and processing results of the faults. The integrity evaluation formula of the fault record takes into account the timeliness and accuracy of the record, ensuring the comprehensiveness and reliability of the fault record. This design not only provides users with comprehensive fault information, but also provides valuable data support for subsequent fault analysis and system improvement.

[0048] Specifically, the system also includes a user interface, allowing the user to manually set the target temperature of the temperature control module. The response time of the user interface is calculated by the following formula: ui =T click -T response +k ui ·(T click -T last ), where T ui Represents the response time of the user interface, T click is the time point of the user's operation, T response is the time it takes for the system to respond to user operations, K ui is the user interface response coefficient, T last The time point of the last user operation. The design of the user interface takes into account the user's operation convenience and intuitiveness, allowing the user to easily set the target temperature of the temperature control module. The response time formula of the user interface takes into account the time point of the user operation and the system response time, ensuring the rapid response of the user interface. By optimizing the algorithm, the operation delay is reduced and the user experience is improved.

[0049] Preferably, the user interface provides a real-time data display function, including the temperature, flow rate and pressure of the cooling medium, and the data update frequency is further determined by the following formula, taking into account the real-time nature of the data and the load of the system, f update Indicates the data update frequency, T update is the data update cycle, k loda is the system load factor, C system To ensure the computing power of the system, the user interface provides real-time data display functions, including the temperature, flow rate and pressure of the cooling medium. The formula for data update frequency takes into account the real-time nature of the data and the system load, ensuring the accuracy of the data and the efficient operation of the system.

[0050] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

Claims

1. A high-voltage inverter air-water cooling system, characterized in that: include: An input module for receiving heat energy from a high voltage inverter; A heat exchange module, used to transfer the heat energy received by the input module to a cooling medium; A cooling medium circulation module, used for circulating the cooling medium to maintain its cooling effect; A temperature control module for monitoring and regulating the temperature of the cooling medium; An intelligent control module is used to automatically adjust the flow rate of the cooling medium according to the data of the temperature control module; Safety monitoring module, used to monitor the operating status of the entire system to ensure safe operation; The amount of heat energy transferred in the intelligent control module adopts the following algorithm formula, Q = k·A·ΔT, where Q is the amount of heat energy transferred, k is the thermal conductivity coefficient, A is the heat exchange area, and ΔT is the temperature difference.

2. The air-water cooling system for a high-voltage frequency converter according to claim 1, characterized in that: The heat exchange module adopts a multi-channel design and improves the heat exchange efficiency by optimizing fluid dynamics. The heat exchange efficiency formula of the module is: Where η is the heat exchange efficiency, Q in is the heat energy entering the heat exchange module, Q out is the heat energy leaving the heat exchange module, and the thermal efficiency formula after multi-channel optimization is where η opt Represents the optimized heat exchange efficiency, where N channels is the number of channels, η base The basic heat exchange efficiency.

3. The air-water cooling system for a high-voltage frequency converter as claimed in claim 2, characterized in that: The cooling medium circulation module includes a circulation pump for promoting the circulation of the cooling medium in the system. At the same time, the outer surface of the pump is sprayed with corrosion-resistant paint, and the working efficiency of the pump conforms to the following formula, and this group of formulas takes into account the operating efficiency and fluid dynamics characteristics of the pump. where η pump Indicates the working efficiency of the pump, P out is the power output of the pump, P in is the power input to the pump, P loss is the power loss of the pump during operation, V flow Represents the volume flow rate of the fluid, P electrical Indicates the electrical power consumed by the pump.

4. The air-water cooling system for a high-voltage frequency converter as claimed in claim 3, characterized in that: The temperature control module includes at least one temperature sensor for real-time monitoring of the temperature of the cooling medium. The data acquisition frequency of the sensor is determined by the following formula: f sample Indicates the data collection frequency, T response is the system response time. If the dynamic response requirements of the system are taken into account, the data acquisition frequency can also be determined by the following formula: sample =2·f system , where f system is the operating frequency of the system, ensuring that the sampling frequency is at least twice the operating frequency of the system to satisfy the Nyquist sampling theorem.

5. The air-water cooling system for a high-voltage frequency converter as claimed in claim 4, characterized in that: The data of the temperature sensor is transmitted to the intelligent control module via wireless transmission, and the transmission rate thereof conforms to the following formula: Where R trans Indicates the transmission rate, L dota is the amount of data transmitted, T trans is the transmission time, N packets is the number of packets, R link The reliability of the wireless link.

6. The air-water cooling system for a high-voltage frequency converter as claimed in claim 5, characterized in that: The intelligent control module automatically adjusts the pump speed according to the data of the temperature sensor to optimize the cooling effect. The adjustment strategy is guided by the following formula: where ω pump represents the regulated pump speed, ω base is the basic speed, k temp is the temperature regulation coefficient, T set is the set temperature, T measured is the actual measured temperature, k damp represents the damping coefficient, is the temperature change rate, which is used to suppress overshoot and oscillation of the system.

7. The air-water cooling system for a high-voltage frequency converter as claimed in claim 6, characterized in that: The safety monitoring module includes a fault detection mechanism for timely detecting and handling system anomalies. The sensitivity of fault detection is further defined by the following formula, which takes into account the system's fault tolerance and the severity of the fault, Among them, S fault represents the sensitivity of fault detection, T measured is the actual measured temperature, T set is the set temperature, k severity is the fault severity factor, S severity An indicator of the severity of the fault.

8. The air-water cooling system for a high-voltage frequency converter as claimed in claim 7, characterized in that: The safety monitoring module can automatically record the time, type and processing results of the fault. The integrity of the fault record is further evaluated by the following formula, which takes into account the timeliness and accuracy of the fault record: C record Indicates the completeness of fault records, N recorded is the number of recorded faults, N total is the total number of failures, T accuracy is the accuracy time window of the record, T total is the total time window.

9. The air-water cooling system for a high-voltage frequency converter according to claim 1, characterized in that: The system also includes a user interface, allowing the user to manually set the target temperature of the temperature control module. The response time of the user interface is calculated by the following formula: ui =T click -T response +k ui ·(T click -T last ), where T ui Represents the response time of the user interface, T click is the time point of the user operation, T response is the time it takes for the system to respond to user operations, K ui is the user interface response coefficient, T last The time point of the last user operation.

10. The air-water cooling system for a high-voltage frequency converter according to claim 9, characterized in that: The user interface provides real-time data display functions, including the temperature, flow rate and pressure of the cooling medium. The data update frequency is further determined by the following formula, taking into account the real-time nature of the data and the load of the system. f update Indicates the data update frequency, T update is the data update cycle, k loda is the system load factor, C system The computing power of the system.

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