A closed coolant system

Abstract

This utility model relates to the field of refrigeration control technology. A closed-loop coolant system is disclosed for temperature control of a test platform load, comprising: a liquid cooling module, a liquid supply module, a heat exchange module, and a central control module; the liquid cooling module and the liquid supply module are connected, a first medium in the liquid cooling module and a second medium in the liquid supply module exchange heat, the liquid supply module and the heat exchange module are connected, the heat exchange module and the test platform load are connected, and the second medium in the liquid supply module and a third medium in the test platform load exchange heat in the heat exchange module; the heat exchange module includes multiple heat exchangers, the test platform load includes multiple loads, and the heat exchangers and loads are connected in a one-to-one correspondence; a flow regulation structure is provided on the connecting pipe between the heat exchanger and the liquid supply module, and a first temperature detection structure is provided on the load corresponding to the heat exchanger; the flow regulation structure and the first temperature detection structure are electrically connected to the central control module, respectively. This application enables individual temperature control of multiple independent loads.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration control technology, and in particular to a closed-loop coolant system. Background Technology

[0002] The coolant system, as an essential environmental temperature control system for large-scale test platforms, plays a crucial role in the success of experiments. Traditional cooling systems have fixed parameters for their internal components, such as condensers, expansion valves, cooling capacity design, and piping construction. While this construction method is simple and easy to implement, it also has obvious drawbacks, such as large fluctuations in temperature during use due to changes in ambient temperature, and the inability to perform differentiated temperature control for multiple independent loads (e.g., simultaneously maintaining -10℃, 4℃, and 25℃), thus reducing experimental efficiency.

[0003] Therefore, a coolant system capable of simultaneously controlling the temperature of multiple independent loads individually is needed. Utility Model Content

[0004] Therefore, this utility model provides a closed-loop coolant system.

[0005] Specifically, the following technical solutions are included:

[0006] A closed-loop coolant system for temperature control of a test platform load includes:

[0007] Liquid cooling module, liquid supply module, heat exchange module, central control module;

[0008] The liquid cooling module is connected to the liquid supply module, the first medium in the liquid cooling module and the second medium in the liquid supply module exchange heat, the liquid supply module is connected to the heat exchange module, the heat exchange module is connected to the test platform load, and the second medium in the liquid supply module and the third medium in the test platform load exchange heat in the heat exchange module.

[0009] The heat exchange module includes multiple heat exchangers, and the test platform load includes multiple loads. The heat exchangers and the loads are connected in a one-to-one correspondence. A flow regulation structure is provided on the connecting pipeline between the heat exchanger and the liquid supply module. A first temperature detection structure is provided on the load corresponding to the heat exchanger. The flow regulation structure and the first temperature detection structure are electrically connected to the central control module.

[0010] For example, the flow regulation structure includes a regulating valve and a flow meter, and the regulating valve and the flow meter are electrically connected to the central control module, respectively.

[0011] For example, the regulating valve is an electric three-way valve, one port of the regulating valve is connected to the liquid supply pipeline of the liquid supply module, one port of the regulating valve is connected to the inlet of the heat exchanger, one port of the regulating valve is connected to the return pipeline of the liquid supply module, and the outlet of the heat exchanger is connected to the return pipeline of the liquid supply module.

[0012] For example, the liquid cooling module is provided with at least one liquid cooling unit, and at least one of the liquid cooling units is connected to the liquid supply module.

[0013] For example, the liquid supply module is provided with a second temperature detection structure, and the second temperature detection structure is electrically connected to the central control module.

[0014] For example, the liquid supply module includes a cold storage tank and a circulation pump;

[0015] The cold storage tank is connected to the liquid cooling module, the circulating pump is connected to the cold storage tank and the heat exchange module, and the second temperature detection structure is installed on the outlet pipe of the circulating pump.

[0016] For example, the liquid supply module further includes a heating structure disposed in the cold storage tank.

[0017] For example, the liquid supply module further includes a liquid storage tank, a replenishment pump, and an overflow structure;

[0018] The cold storage tank is equipped with a liquid level detection structure. The liquid storage tank and the cold storage tank are connected by the liquid replenishment pump. The overflow structure is installed on the cold storage tank and is connected to the liquid storage tank.

[0019] For example, the liquid supply module further includes a filter and a differential pressure detection structure;

[0020] The filter is installed on the return liquid pipeline connecting the heat exchange module and the cold storage tank. The differential pressure detection structure is connected to the inlet and outlet pipelines of the filter. The differential pressure detection structure and the central control module are electrically connected.

[0021] For example, the central control module includes a data acquisition unit, an alarm unit, a human-machine interaction unit, and a data processing unit;

[0022] The data acquisition unit and the data processing unit are electrically connected, the data processing unit and the alarm unit are electrically connected, and the data acquisition unit, the alarm unit, and the data processing unit are each electrically connected to the human-machine interaction unit.

[0023] The beneficial effects of the technical solution provided by this utility model include at least the following:

[0024] In this application, the load and heat exchanger are configured in a one-to-one correspondence. The first temperature detection structure is a temperature sensor, which can provide feedback on the temperature change of the load. Based on the temperature change of the load, the flow rate of the second medium entering the heat exchanger corresponding to the load is adjusted by the central control module through the flow regulation structure. This allows for individual temperature control of multiple independent loads. On the same test platform, tests requiring different temperature conditions can be conducted simultaneously, greatly improving test efficiency and flexibility. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the modules of a closed-loop coolant system according to an embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram illustrating the working principle of each module of a closed-loop coolant system according to an embodiment of the present invention.

[0028] Figure 3 This is a block diagram illustrating the control principle of the central control module according to one embodiment of the present invention.

[0029] Figure 4 This is a schematic diagram of CPU hot backup for a central control module according to an embodiment of the present invention;

[0030] Figure 5 This is a communication network diagram of the central control module according to one embodiment of the present invention.

[0031] The reference numerals in the figure are respectively:

[0032] 100 - Closed-loop coolant system; 110 - Liquid cooling module; 111 - Liquid cooling unit; 120 - Liquid supply module; 121 - Liquid supply circulation unit; 122 - Temperature measurement and control unit; 1221 - Heating structure; 123 - Cold storage tank unit; 1231 - Cold storage tank; 1232 - Liquid storage tank; 1233 - Replenishment pump; 1234 - Filling valve; 1235 - Overflow structure; 1236 - Vent valve; 124 - Filter; 130 - Heat exchange module; 1 31-Heat exchanger; 132-Regulating valve; 140-Sensor group; 141-First temperature detection structure; 142-Second temperature detection structure; 143-Differential pressure detection structure; 144-Liquid level detection structure; 150-Central control module; 151-PLC; 152-Configuration software; 153-Leakage alarm; 154-SMS alarm device; 160-Connection pipeline; 200-Test platform load; 201-Load; 300-Host computer.

[0033] The accompanying drawings have illustrated specific embodiments of the present invention, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0035] Before further describing the embodiments of this utility model in detail, the directional terms involved in the embodiments of this utility model, such as "upper part," "lower part," and "side part," are used to refer to... Figure 1 The orientation shown is a reference and does not limit the scope of protection of this utility model.

[0036] To make the technical solution and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0037] Currently, coolant systems cannot simultaneously control the temperature of multiple independent loads 201 individually. To address this technical problem, this application proposes a closed-loop coolant system 100.

[0038] In one embodiment, such as Figure 1The closed-loop coolant system 100 shown is used for temperature control of the test platform load 200. The closed-loop coolant system 100 includes: a liquid cooling module 110, a liquid supply module 120, a heat exchange module 130, and a central control module 150. Figure 2 As shown, the liquid cooling module 110 and the liquid supply module 120 are connected. The first medium in the liquid cooling module 110 and the second medium in the liquid supply module 120 exchange heat. The liquid supply module 120 is connected to the heat exchange module 130 and the test platform load 200. The second medium in the liquid supply module 120 and the third medium in the load module 201 exchange heat in the heat exchange module 130. The heat exchange module 130 includes multiple heat exchangers 131, and the load module 201 includes multiple loads 201. The heat exchangers 131 and the loads 201 are connected in a one-to-one correspondence. A flow regulation structure is provided on the connecting pipe between the heat exchangers 131 and the liquid supply module 120. A first temperature detection structure 141 is provided on the load 201 corresponding to the heat exchanger 131. The flow regulation structure and the first temperature detection structure 141 are electrically connected to the central control module 150. In this application, the load 201 and the heat exchanger 131 are configured in a one-to-one correspondence. The first temperature detection structure 141 is a temperature sensor, which can provide feedback on the temperature change of the load 201. Based on the temperature change of the load 201, the flow rate of the second medium entering the heat exchanger 131 corresponding to the load 201 is adjusted by the central control module 150 through the flow regulation structure. This allows for individual temperature control of multiple independent loads 201. On the same test platform, tests requiring different temperature conditions can be conducted simultaneously, greatly improving test efficiency and flexibility.

[0039] In one embodiment, the first medium is a refrigerant, the second medium is ethylene glycol coolant, and the third medium is the heat exchange medium in load 201.

[0040] In one embodiment, the flow regulation structure includes a regulating valve 132 and a flow meter, both electrically connected to a central control module 150. The central control module 150 controls the opening of the regulating valve 132 to regulate the flow rate of the second medium entering the heat exchanger 131. The flow meter can obtain the actual flow rate entering the heat exchanger 131.

[0041] In one embodiment, the regulating valve 132 is an electrically operated three-way valve. One port of the regulating valve 132 is connected to the supply line of the liquid supply module 120, another port is connected to the inlet of the heat exchanger 131, and the return line of the liquid supply module 120 is also connected. The outlet of the heat exchanger 131 is connected to the return line of the liquid supply module 120. The bypass flow of the electrically operated three-way valve connected to the return line of the liquid supply module 120 is controlled by the central control module 150 to regulate the flow rate of the second medium entering the heat exchanger 131.

[0042] In one embodiment, the heat exchanger 131 consists of a finned tube heat exchanger and liquid piping, enabling heat exchange between the second and third media. Specifically, the heat exchanger 131 is the medium for heat exchange between the second and third media. The heat exchanger 131 in this application mainly consists of a finned tube heat exchanger and liquid piping. The second medium flows through the heat exchanger 131, exchanging heat with the third medium and absorbing the heat generated by the third medium, thereby achieving temperature control of the third medium. The design of the heat exchanger 131 fully considers heat exchange efficiency and fluid resistance to ensure that heat can be efficiently transferred from the third medium to the second medium.

[0043] In one embodiment, the liquid cooling module 110 is provided with at least one liquid cooling unit 111, and the at least one liquid cooling unit 111 is connected to the liquid supply module 120. In this application, the liquid cooling unit 111 is an air-cooled compression refrigeration system that provides sufficient cooling capacity to the liquid supply module 120. It controls the effective flow rate of refrigerant into the evaporator through a condensing pressure controller, hot gas bypass, and expansion valve, achieving precision in cooling capacity output and liquid supply outlet temperature. The liquid supply temperature refers to the temperature of the first medium exchanging heat with the liquid supply module 120, which is -10℃ ± 2℃. Specifically, the liquid cooling unit 111, in conjunction with the electronic expansion valve, precisely controls the refrigerant temperature in the evaporator, with a maximum accuracy of ±0.5℃. Furthermore, through the electrical control box of the liquid cooling unit 111, one of the operating compressors can be started and stopped in a timely manner to achieve precise control of the refrigerant temperature in the evaporator.

[0044] In one embodiment, when multiple liquid cooling units 111 are provided, each liquid cooling unit 111 can operate independently or work collaboratively, and can serve as a backup for each other through bypass valves to provide sufficient cooling capacity and ensure system redundancy and reliability, while also providing variable capacity cooling and high-precision temperature control. For example, two liquid cooling units 111 are provided. This configuration can meet the test platform's requirements for coolant at different temperatures, and if one liquid cooling unit 111 fails, the other liquid cooling unit 111 can take over, ensuring the continuity of the test.

[0045] Specifically, in each liquid-cooled unit 111, the refrigerant absorbs heat from the coolant in the evaporator, changing from a low-temperature, low-pressure liquid to a low-temperature, low-pressure gas. Subsequently, the refrigerant gas is drawn into the compressor and compressed into a high-temperature, high-pressure gas, which then enters the air-cooled condenser for cooling, condensing into a high-pressure, room-temperature liquid. Finally, the high-pressure, room-temperature refrigerant liquid is throttled by a throttling device (such as an electronic expansion valve), becoming a low-temperature, low-pressure liquid again, and re-enters the evaporator to complete the refrigeration cycle. To ensure normal compressor startup under low-temperature conditions, the compressor in the liquid-cooled unit 111 is equipped with a crankcase heating belt, enabling it to start heating in low-temperature environments. Simultaneously, a pressure sensor is installed at the condenser outlet, and a condensing pressure controller controls the opening and closing of the bypass solenoid valve and the start / stop of the condenser fan to ensure the condensing pressure remains stable at a certain value, guaranteeing normal compressor operation.

[0046] In one embodiment, the liquid supply module 120 is provided with a second temperature detection structure 142, which is electrically connected to the central control module 150. The second temperature detection structure 142 is a temperature sensor that can detect the temperature of the second medium in the liquid supply module 120 that exchanges heat with the third medium. When the temperature of the second medium cannot meet the heat exchange requirements of the third medium, the liquid cooling module 110 can be used to cool down the second medium in the liquid supply module 120.

[0047] In one embodiment, the liquid supply module 120 includes a cold storage tank 1231 and a circulation pump. The cold storage tank 1231 is connected to the liquid cooling module 110, and the circulation pump is connected to the cold storage tank 1231 and the heat exchange module 130. A second temperature detection structure 142 is disposed on the outlet pipe of the circulation pump. The second medium, after exchanging heat with the refrigerant in the evaporator of the liquid cooling unit 111, is stored in the cold storage tank 1231. The circulation pump pumps the second medium in the cold storage tank 1231 to the heat exchanger 131 of the heat exchange module 130 to exchange heat with the third medium. The cold storage tank 1231 has a capacity of 200L to buffer system load changes and ensure the stability of the second medium supply.

[0048] In one embodiment, the liquid supply module 120 further includes a heating structure 1221, which is disposed in the cold storage tank 1231. The heating structure 1221 is an electric heating structure, and is electrically connected to the central control module 150. When the temperature deviation of the second medium in the cold storage tank from the set value is detected, the central control module 150 controls the heating structure 1221 to be turned on to control the temperature of the second medium in the cold storage tank, ensuring that the temperature in the cold storage tank is stable within a very small range, with a maximum temperature control accuracy of ±0.2℃.

[0049] In one embodiment, the liquid supply module 120 further includes a storage tank 1232, a replenishment pump 1233, and an overflow structure 1235. A liquid level detection structure 144 is installed in the cold storage tank 1231. The storage tank 1232 and the cold storage tank 1231 are connected via the replenishment pump 1233. The overflow structure 1235 is installed on the cold storage tank 1231 and connected to the storage tank 1232. The liquid level detection structure 144, the replenishment pump 1233, and the central control module 150 are electrically connected. When the liquid level detection structure 144 detects that the liquid level in the cold storage tank 1231 is lower than a preset value or the back pressure is low, it activates the replenishment pump 1233 to automatically replenish liquid into the cold storage tank 1231 to maintain the system liquid level and prevent insufficient liquid from affecting system operation. When the liquid level in the cold storage tank 1231 is higher than the preset value, excess liquid flows back to the storage tank 1232 through the overflow structure 1235. The specific connection pipeline between the replenishment pump 1233 and the cold storage tank 1231 is also equipped with a filling valve 1234. The filling valve 1234 is electrically connected to the central control module 150. When replenishing liquid into the cold storage tank 1231, the filling valve 1234 is opened, and the filling valve 1234 is closed under normal circumstances. The liquid level detection structure 144 is a liquid level gauge.

[0050] In one embodiment, the cold storage tank 1231 is also provided with an exhaust valve 1236.

[0051] In one embodiment, the liquid supply module 120 further includes a filter 124 and a differential pressure detection structure 143; the filter 124 is disposed on the return liquid pipeline connecting the heat exchange module 130 and the cold storage tank 1231, and the differential pressure detection structure 143 is connected to the inlet and outlet pipelines of the filter 124, and is electrically connected to the central control module 150. The differential pressure detection structure 143 is a differential pressure sensor.

[0052] In one specific embodiment, the liquid supply module 120 includes a liquid supply circulation unit 121, a temperature measurement and control unit 122, and a cold storage tank 1231. The liquid supply circulation unit 121 includes multiple circulation pumps operating in parallel, for example, employing a two-in-one-out operating mode to provide a stable liquid supply flow rate and head. For example, the liquid supply flow rate can reach 2.1 m³ / h. 3The coolant supply head can reach 77m / h. This redundant design ensures a continuous and stable supply of coolant, and the system can still operate normally even if one of the circulation pumps fails. The temperature control unit 122 includes a heating structure 1221 and a temperature sensor installed in the cold storage tank 1231 to monitor the temperature of the coolant in the cold storage tank 1231 in real time, and to achieve precise temperature control through cold storage combined with auxiliary electric heating. The cold storage tank 1231 includes a cold storage tank 1231, a liquid storage tank 1232, a replenishment pump 1233, an overflow structure 1235, an exhaust valve 1236, a filling valve 1234, etc. This application integrates the coolant supply circulation unit 121, the temperature control unit 122, and the cold storage tank 1231 into the same enclosure, which greatly reduces the difficulty of system installation and construction, and improves the process controllability and reliability of the system.

[0053] In one embodiment, the sensor group 140 includes, but is not limited to, a first temperature detection structure 141, a second temperature detection structure 142, a differential pressure detection structure 143, a flow detection structure, and a liquid level detection structure 144. The sensor group 140 is electrically connected to the central control module 150 to provide real-time feedback of the status parameters of each medium. These parameters include, but are not limited to, the liquid supply outlet temperature and return temperature of the liquid cooling unit 111, the liquid supply flow rate and pressure of the liquid supply module 120, the liquid level and outlet temperature of the cold storage tank 1231, the flow rate and temperature of the second medium entering each heat exchanger 131, the inlet and outlet temperatures of each load 201, and key parameters such as pressure and flow rate in the system pipelines.

[0054] In one embodiment, the connecting pipelines between the liquid cooling module 110, the liquid supply module 120, the heat exchange module 130, and the test platform load 200 are connected by an online pipeline 160. The online pipeline 160 in this application is made of high-quality stainless steel (e.g., 304 stainless steel) with a wall thickness of not less than 2mm, ensuring the corrosion resistance and mechanical strength of the pipeline system. The pipeline is mainly sealed by welding, with heavy-duty sanitary clamps selected for local maintenance locations, enabling quick maintenance and replacement while ensuring both system sealing and maintainability. The pipeline is wrapped with insulation material of not less than 20mm thickness, effectively preventing cold loss and condensation in the cold pipelines, thus improving system energy efficiency. Flame-retardant shielded cables are used for communication cables, and galvanized cable trays are used for protection when multiple cables are laid, while single cables are protected by galvanized conduits to reduce external interference and provide reliable communication quality.

[0055] In one embodiment, such as Figure 3As shown, the central control module 150, as the core control unit of the system, uses a programmable logic controller (PLC151) as the main controller and has a CPU hot backup function to ensure the stability and reliability of the control system. The central control module 150 interacts with and controls the sensor group 140 and various actuators (such as water pumps, compressors, fans, electric valves, etc.) through I / O interfaces. The central control module 150 also integrates configuration software 152, which is used to realize functions such as human-machine interface, system status display, parameter setting, fault alarm, automatic data acquisition, processing, storage, and uploading to the host computer 300. In addition, the central control module 150 is equipped with a leak alarm 153 and an SMS alarm device 154. Once a leak or parameter exceeding the limit is detected, an audible and visual alarm will be immediately issued, and the on-duty personnel or user's mobile phone will be notified via SMS, achieving timely early warning of abnormal system conditions and greatly reducing the workload and response time of manual inspections.

[0056] In one specific embodiment, the central control module 150 includes a data acquisition unit, an alarm unit, a human-machine interaction unit, and a data processing unit; the data acquisition unit and the data processing unit are electrically connected, the data processing unit and the alarm unit are electrically connected, and the data acquisition unit, the alarm unit, and the data processing unit are each electrically connected to the human-machine interaction unit.

[0057] In one specific embodiment, the data acquisition unit is used to acquire various data fed back by the sensor group 140. The alarm unit includes a leak alarm 153 and an SMS alarm device 154. The leak alarm 153 checks for leaks at all pipeline locations in the system. If a leak is detected, leak information is collected within approximately 1-2 minutes, and an alarm is sent to the host computer 300. Key parameters of the system's operating status and faults can be sent to on-duty personnel or users' mobile phones via the SMS alarm device 154 for status reminders or fault indications. Figure 4 As shown, the data processing unit includes a PLC151, which comprises CPU1 and CPU2. CPU1 (main controller) and CPU2 (backup) are electrically connected via a program synchronization module. Under normal conditions, CPU1 (main controller) operates, and data backup is performed on CPU2 (backup) via the program synchronization module. The two CPU modules are constantly synchronized with each other. If one CPU module loses power or is damaged due to an abnormality, the system will automatically switch to the other CPU module via an automatic switching mechanism, achieving a 0-second switchover, and will issue an audible and visual alarm upon failure. This redundancy design greatly improves the system's fault tolerance and operational continuity. Figure 3As shown, the central control module 150 is equipped with configuration software 152, which includes a human-machine interaction unit, data storage and remote monitoring. The human-machine interaction unit implements a user-friendly human-machine interface, which can be a touch screen. Through the touch screen or the host computer 300, users can monitor the system status, set parameters, query fault information, and view historical data and trend curves.

[0058] In a specific embodiment, such as Figure 5 As shown, the central control module 150 communicates with the host computer 300 via a network (Ethernet). The central control module 150 is electrically connected to the sensor group 140, actuator, liquid cooling module 110, and liquid supply module 120 via an RS485 / 422 bus. The central control module 150 automatically records all key data and operation records during system operation and can upload the data to the host computer 300 for storage and analysis. Users can remotely monitor, query, and replay data through the host computer 300 or a touchscreen, and can generate reports as needed. This comprehensive data management function facilitates the traceability of the experimental process and the evaluation and optimization of system performance.

[0059] In one specific embodiment, the central control module 150 makes decisions based on preset test environment temperature requirements, real-time collected system operating parameters, and the actual needs of the test verification platform load 201, using built-in intelligent control algorithms. These algorithms include, but are not limited to, PID control, fuzzy control, adaptive control, or model prediction-based control algorithms, to achieve dynamic and optimized adjustment of system operating parameters.

[0060] Specific adjustment strategies include:

[0061] Cooling capacity adjustment: Based on the heat changes of each load 201 and the target temperature, the central control module 150 dynamically adjusts the operating status of the liquid cooling unit 111 in the liquid cooling module 110 (e.g., start / stop the liquid cooling unit 111, adjust the compressor frequency) to accurately match the required cooling capacity.

[0062] Liquid supply parameter adjustment: According to the requirements of each load 201, the central control module 150 controls the operating frequency and number of circulating pumps in the liquid supply module 120 to adjust the liquid supply flow rate and head. At the same time, by controlling the power of the auxiliary heating structure 1221, the temperature of the second medium in the cold storage tank 1231 is finely adjusted to ensure the accuracy of the liquid supply temperature.

[0063] Electric three-way valve control: For each independent test space of the load 200 on the test platform, the central control module 150 can independently control the bypass volume of the corresponding electric three-way valve according to the target temperature set for each load 201. When the system detects that the outlet temperature of load 201 deviates from the target temperature set value, the central control module 150 automatically adjusts the bypass volume of the electric three-way valve to achieve accurate control of the outlet temperature of load 201. For example, when the front-end inlet temperature changes by more than ±1℃, a control accuracy of 1:500 can be achieved, and theoretically, a temperature control accuracy of ±0.01℃ can be achieved (depending on the measurement accuracy of the temperature sensor and the rationality of the control logic). Thus, the central control module 150 can achieve multi-point independent and precise temperature control, enabling simultaneous testing under different temperature conditions on the same test platform, greatly improving testing efficiency and flexibility.

[0064] In one specific embodiment, the closed-loop coolant system 100 enables rapid response and stable control. When the temperature demand of the test platform load 200 changes significantly, the central control module 150 can quickly adjust the operating mode of the liquid cooling module 110 (e.g., adjust the operating status of the liquid cooling unit 111, or adjust the compressor frequency), and, combined with the buffering effect of the cold storage tank 1231 in the liquid supply module 120, quickly adjust the temperature of the second medium to the target value and maintain stability. This rapid response capability is crucial for scenarios requiring tests with large temperature changes.

[0065] In one specific embodiment, the closed-loop coolant system 100 is capable of fault diagnosis and early warning. The central control module 150 continuously monitors the system's operating status and performs real-time analysis of various parameters. Once a parameter exceeding the limit (such as excessively high supply temperature, excessively low liquid level, or excessively high supply pressure) or equipment malfunction (such as abnormal operation of the circulating pump, solenoid valve, or liquid cooling module 110) is detected, the central control module 150 will immediately activate the fault protection mechanism, automatically shut down the system to prevent equipment damage, and send alarm signals to the on-duty personnel through a buzzer, the configuration software 152 interface, and the SMS alarm device 154. This multi-alarm mechanism ensures that system anomalies can be detected and handled in a timely manner, guaranteeing the safe and stable operation of the system.

[0066] This closed-loop coolant system 100 possesses multi-point independent temperature control capabilities: it can simultaneously provide differentiated temperature control for multiple independent test fluid circuits, greatly improving the flexibility and efficiency of the test platform. It achieves rapid temperature response and high-precision control: through the variable-capacity liquid cooling module 110, precise liquid supply control, and intelligent algorithms, it achieves rapid response and high-precision control of coolant temperature, meeting the stringent temperature control requirements of large-scale test platforms. The system features high reliability and redundancy design: mutual backup of the liquid cooling units 111, dual-use and one-backup circulation pumps, and CPU hot backup of the PLC 151 ensure the reliability of long-term stable operation. Intelligent operation and maintenance: the central control module 150 realizes automatic data acquisition, processing, storage, remote monitoring, and fault early warning, reducing the workload of manual operation and maintenance and improving the system's intelligence level. Energy-saving and efficient: dynamically adjusting the cooling capacity and liquid supply strategy according to the actual load 201 demand avoids unnecessary energy waste and improves the overall energy efficiency of the system. Superior materials and processes: the use of stainless steel pipelines and professional connection methods ensures the purity of the coolant and the long-term stability of the pipeline system.

[0067] This application provides a closed-loop coolant system 100 that is fully functional, high-performance, highly reliable, and easy to operate and maintain, which can effectively improve the temperature control capability and testing efficiency of large-scale test platforms.

[0068] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0069] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0070] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A closed-loop coolant system for temperature control of a test platform load, characterized in that, include: Liquid cooling module, liquid supply module, heat exchange module, central control module; The liquid cooling module is connected to the liquid supply module, the first medium in the liquid cooling module and the second medium in the liquid supply module exchange heat, the liquid supply module is connected to the heat exchange module, the heat exchange module is connected to the test platform load, and the second medium in the liquid supply module and the third medium in the test platform load exchange heat in the heat exchange module. The heat exchange module includes multiple heat exchangers, and the test platform load includes multiple loads. The heat exchangers and the loads are connected in a one-to-one correspondence. A flow regulation structure is provided on the connecting pipeline between the heat exchanger and the liquid supply module. A first temperature detection structure is provided on the load corresponding to the heat exchanger. The flow regulation structure and the first temperature detection structure are electrically connected to the central control module.

2. The closed-loop coolant system according to claim 1, characterized in that, The flow regulation structure includes a regulating valve and a flow meter, and the regulating valve and the flow meter are electrically connected to the central control module respectively.

3. A closed-loop coolant system according to claim 2, characterized in that, The regulating valve is an electric three-way valve. One port of the regulating valve is connected to the liquid supply pipeline of the liquid supply module, one port of the regulating valve is connected to the inlet of the heat exchanger, one port of the regulating valve is connected to the return pipeline of the liquid supply module, and the outlet of the heat exchanger is connected to the return pipeline of the liquid supply module.

4. A closed-loop coolant system according to claim 1, characterized in that, The liquid cooling module is provided with at least one liquid cooling unit, and at least one of the liquid cooling units is connected to the liquid supply module.

5. A closed-loop coolant system according to claim 1, characterized in that, The liquid supply module is equipped with a second temperature detection structure, and the second temperature detection structure is electrically connected to the central control module.

6. A closed-loop coolant system according to claim 5, characterized in that, The liquid supply module includes a cold storage tank and a circulation pump; The cold storage tank is connected to the liquid cooling module, the circulating pump is connected to the cold storage tank and the heat exchange module, and the second temperature detection structure is installed on the outlet pipe of the circulating pump.

7. A closed-loop coolant system according to claim 6, characterized in that, The liquid supply module also includes a heating structure, which is disposed in the cold storage tank.

8. A closed-loop coolant system according to claim 6, characterized in that, The liquid supply module also includes a liquid storage tank, a replenishment pump, and an overflow structure; The cold storage tank is equipped with a liquid level detection structure. The liquid storage tank and the cold storage tank are connected by the liquid replenishment pump. The overflow structure is installed on the cold storage tank and is connected to the liquid storage tank.

9. A closed-loop coolant system according to claim 6, characterized in that, The liquid supply module also includes a filter and a differential pressure detection structure; The filter is installed on the return liquid pipeline connecting the heat exchange module and the cold storage tank. The differential pressure detection structure is connected to the inlet and outlet pipelines of the filter. The differential pressure detection structure and the central control module are electrically connected.

10. A closed-loop coolant system according to claim 1, characterized in that, The central control module includes a data acquisition unit, an alarm unit, a human-machine interaction unit, and a data processing unit; The data acquisition unit and the data processing unit are electrically connected, the data processing unit and the alarm unit are electrically connected, and the data acquisition unit, the alarm unit, and the data processing unit are each electrically connected to the human-machine interaction unit.

Images