Method and system for comprehensive regulation of ambient temperature and medium temperature with out-of-band energy storage

Abstract

This invention relates to a method for integrated control of ambient temperature and medium temperature with external energy storage, and pertains to the field of aero-engine temperature control testing. This technical solution employs a dual-path parallel architecture with co-source heat transfer oil, enabling simultaneous independent closed-loop control of ambient temperature and fuel medium temperature. This replicates the comprehensive temperature conditions of aero-engine accessories during service, improving the accuracy of ground test conditions and fault detection capabilities. An external oil storage tank is used to construct a buffer energy storage branch, which can smooth out sudden changes in heat exchange caused by drastic power fluctuations in the test specimen, reducing temperature shocks on the medium side and improving the operational stability and control accuracy of the medium temperature. On the medium side, a variable frequency circulating pump independently controls the heat exchange flow rate, operating decoupled from the ambient side regulating valve temperature control loop, ensuring that the two temperature control paths do not interfere with each other. Under high-temperature medium test conditions, a small circulation loop on the fuel supply side is constructed through a three-way valve to prevent direct return of high-temperature fuel to the fuel tank, avoiding excessive overall fuel temperature and eliminating safety hazards associated with high-temperature operation.

Description

Technical Field

[0001] This invention relates to the field of aero-engine temperature control testing technology, and in particular to a method and system for integrated control of ambient temperature and medium temperature with external energy storage. Background Technology

[0002] Aero-engine control systems and their accessories must withstand the combined effects of high and low temperature air environments and high and low temperature fuel media during actual operation. Harsh temperature conditions directly impact their operational reliability, thereby threatening flight safety. Currently, ground verification phases commonly employ discrete temperature control test schemes, configuring independent ambient temperature control systems and fuel medium temperature control systems. Each system is equipped with a separate heat transfer oil unit, heat exchange unit, and closed-loop control module, capable of independently completing single-condition temperature tests of components such as electronic controllers, sensors, fuel pumps, actuators, pipelines, and nozzles. This allows for early detection and identification of temperature-induced potential faults during the ground phase.

[0003] However, existing discrete temperature control solutions cannot simultaneously conduct coupled tests of ambient temperature and medium temperature, making it difficult to reproduce the comprehensive temperature conditions of actual service of components, resulting in insufficient fit of the test verification conditions; existing integrated temperature control systems do not have an external energy storage buffer structure, and when the power of the test component fluctuates drastically, the sudden change in heat exchange on the medium side can easily cause temperature shock, leading to a decrease in the accuracy of medium temperature control and insufficient steady-state stability; at the same time, under high-temperature medium test conditions, the high-temperature fuel after heat exchange flows directly back to the fuel tank, which can easily cause the overall oil temperature in the fuel tank to exceed the limit, posing a safety hazard. Summary of the Invention

[0004] The purpose of this invention is to provide a method and system for integrated control of ambient temperature and medium temperature with external energy storage, so as to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: In a first aspect, the present invention provides a method for comprehensively controlling the ambient temperature and medium temperature of external energy storage, comprising: The heat transfer oil unit outputs heat transfer oil at a constant temperature and divides the output into two paths; The first stream of heat transfer oil is delivered to heat exchanger I in the environmental chamber via flow regulating valve I. After exchanging heat with the air inside the environmental chamber, it flows back to the heat transfer oil unit. The control system collects the temperature signal from temperature sensor I in the environmental chamber, calculates it with the set value of the ambient temperature, and outputs a control signal to flow regulating valve I to regulate the flow rate of the first stream of heat transfer oil, thereby realizing closed-loop control of the temperature inside the environmental chamber. The second heat transfer oil is delivered to the oil storage tank via flow regulating valve II to maintain the temperature and level of the heat transfer oil in the oil storage tank; the circulating pump draws heat transfer oil from the oil storage tank and delivers it to heat exchanger II in the fuel system to exchange heat with the fuel medium in the fuel system; the control system collects the medium temperature signal in the fuel system, calculates it with the medium temperature setpoint, and outputs a control signal to the circulating pump to adjust the circulating pump speed to change the heat transfer oil flow rate of heat exchanger II, thereby realizing closed-loop control of the fuel medium temperature; By storing heat transfer oil at a set temperature in an oil storage tank, the heat exchange changes caused by power fluctuations in the test specimen are buffered, reducing the temperature shock of the fuel medium.

[0006] In some implementations, the method supports a separate ambient temperature control mode: With flow control valve II closed, only the first heat transfer oil circuit is operated. By adjusting the cooling or heating power of the heat transfer oil unit and the opening of flow control valve I, the low-temperature or high-temperature control of the environmental chamber can be achieved. The method supports individual medium temperature control modes: With flow control valve I closed, only the second heat transfer oil circuit is operated. By adjusting the cooling or heating power of the heat transfer oil unit, the opening of flow control valve II, and the speed of the circulating pump, the low-temperature or high-temperature control of the fuel medium is achieved. The method supports synchronous temperature control mode: Simultaneously opening flow regulating valve I and flow regulating valve II allows the two heat transfer oils to operate in parallel, achieving closed-loop control of the ambient chamber temperature and the fuel medium temperature.

[0007] In some implementations, when the temperature of the high-temperature medium is controlled, the fuel supply pump in the fuel system outputs fuel at a set pressure, and the fuel flows through heat exchanger II and then passes through the test piece. The control system adjusts the opening of the three-way valve to ensure that all the fuel at the outlet of the test piece flows back to the inlet of the fuel supply pump, thus preventing the high-temperature fuel from flowing back to the fuel tank.

[0008] In some implementations, during the ambient temperature control process, the circulating fan inside the environmental chamber runs continuously, driving the internal air circulation to enhance the heat exchange efficiency between heat exchanger I and the air, and to balance the temperature distribution inside the environmental chamber.

[0009] Secondly, the present invention provides a comprehensive control system for ambient temperature and medium temperature of external energy storage, the system being applied to the aforementioned comprehensive control method for ambient temperature and medium temperature of external energy storage, the system comprising: The oil storage tank has its outlet connected to the heat exchanger II heat transfer oil inlet inside the fuel system via a circulating pump. The heat transfer oil unit has two outlets. The first outlet is connected to the oil inlet of heat exchanger I inside the environmental chamber via flow regulating valve I, and the oil outlet of heat exchanger I is connected to the oil return port of the heat transfer oil unit. The second outlet is connected to the oil inlet of the oil storage tank via flow regulating valve II. The environmental chamber is equipped with a temperature sensor I, and the fuel system is equipped with a temperature sensor II. Both temperature sensor I and temperature sensor II are electrically connected to the input terminal of the control system. The output terminal of the control system is electrically connected to the control terminal of the flow regulating valve I, the flow regulating valve II, and the circulation pump, respectively.

[0010] In some embodiments, the environment chamber is further provided with: A circulating fan is used to drive the air circulation inside the environmental chamber; Pressure relief valve, used to balance the internal and external pressure of the environmental chamber.

[0011] In some embodiments, the fuel system includes a fuel tank, a fuel pump, a heat exchanger II, a test piece, and a three-way valve; The oil tank outlet is connected to the oil inlet of the oil supply pump, the oil outlet of the oil supply pump is connected to the fuel oil inlet of the heat exchanger II, the fuel oil outlet of the heat exchanger II is connected to the oil inlet of the test piece, and the oil outlet of the test piece is connected to the oil inlet of the three-way valve; the first oil outlet of the three-way valve is connected to the oil inlet of the oil supply pump, and the second oil outlet of the three-way valve is connected to the oil return port of the oil tank.

[0012] In some embodiments, an oil filter is provided on the oil inlet side of the oil supply pump and an oil filter is provided on the oil outlet side of the oil supply pump; a safety valve and a pressure sensor are also provided on the oil outlet pipeline of the oil supply pump, and the overflow port of the safety valve is connected to the oil tank.

[0013] In some embodiments, the system further includes a central control computer electrically connected to the control system, which is used to input temperature setting parameters and operating mode commands, and to display system operating status data.

[0014] In some embodiments, the heat exchanger II's heat transfer oil outlet is connected to the oil storage tank to form a closed secondary heat transfer oil circulation loop. The oil storage tank is equipped with an overflow return port, which is connected to the return port of the heat transfer oil unit.

[0015] The beneficial effects of the technical solution provided by this invention include at least the following: This technical solution adopts a dual-path parallel architecture with the same source heat transfer oil, which can simultaneously achieve independent closed-loop control of ambient temperature and fuel medium temperature, reproduce the comprehensive temperature conditions of aero-engine accessories in service, improve the condition fit of ground tests and fault detection capabilities, reduce the configuration of independent power units compared to discrete temperature control solutions, and improve equipment integration; an external oil storage and energy storage tank is set up to construct a buffer energy storage branch, which can suppress the sudden change in heat exchange caused by drastic power fluctuations of the test piece, weaken the temperature shock on the medium side, and improve the operational stability and control accuracy of the medium temperature control; the medium side uses a variable frequency circulating pump to independently control the heat exchange flow, and operates decoupled from the ambient side regulating valve temperature control loop, so that the two temperature control paths do not interfere with each other; under high-temperature medium test conditions, a small circulation loop is constructed on the fuel supply side through a three-way valve to block the direct return of high-temperature fuel to the fuel tank, avoid the overall fuel tank temperature exceeding the limit, and eliminate the safety hazards of high-temperature operation; the ambient chamber has a built-in circulating fan to enhance convective heat transfer, improve the uniformity and stability of the temperature field inside the chamber, and accelerate the temperature rise and fall response rate. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0017] Figure 1 The diagram shows a structural block diagram of an integrated control system for ambient temperature and medium temperature of external energy storage provided by an exemplary embodiment of the present invention.

[0018] Figure 2 The diagram illustrates a flowchart of a single ambient temperature control mode in an exemplary embodiment of the present invention, which describes a method for integrated control of ambient temperature and medium temperature in external energy storage.

[0019] Figure 3 The diagram illustrates a flow chart of the individual medium temperature control mode of the integrated control method for ambient temperature and medium temperature of external energy storage provided by an exemplary embodiment of the present invention.

[0020] Figure 4 The diagram illustrates a synchronous temperature control mode of an exemplary embodiment of the present invention for a method for integrated control of ambient temperature and medium temperature in external energy storage.

[0021] In the diagram: 1. Heat transfer oil unit; 2. Flow regulating valve II; 3. Control system; 4. Flow regulating valve I; 5. Central control computer; 6. Environmental chamber; 7. Heat exchanger I; 8. Circulating fan; 9. Temperature sensor I; 10. Pressure relief valve; 11. Fuel system; 12. Test piece; 13. Three-way valve; 14. Heat exchanger II; 15. Oil tank; 16. Oil filter; 17. Oil supply pump; 18. Oil filter; 19. Safety valve; 20. Pressure sensor; 21. Temperature sensor II; 23. Circulating pump; 24. Oil storage tank. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In this specification, identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions towards or away from a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "multiple" means two or more.

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Example 1: Figure 1 This diagram illustrates a structural block diagram of an integrated environmental temperature and medium temperature control system with external energy storage provided by an exemplary embodiment of the present invention. The integrated environmental temperature and medium temperature control system with external energy storage provided in this embodiment is used for temperature verification tests of the control system and accessories of an aero-engine. The integrated environmental temperature and medium temperature control system with external energy storage includes a heat transfer oil unit 1, a flow regulating valve I 4, a flow regulating valve II 2, a control system 3, an environmental chamber 6, an oil storage tank 24, a circulating pump 23, a fuel system 11, and a central control computer 5.

[0026] The heat transfer oil unit 1 has dual-mode output capability for both cooling and heating. Its oil outlet is divided into two independent branches: the first branch is connected to the oil inlet of the heat exchanger I7 inside the environmental chamber 6 via the flow regulating valve I4, and the oil outlet of the heat exchanger I7 flows back to the return oil port of the heat transfer oil unit 1, forming the main hot oil circuit on the environmental side; the second branch is connected to the oil inlet of the oil storage tank 24 via the flow regulating valve II2, so as to continuously replenish the constant temperature heat transfer oil to the oil storage tank 24. The oil outlet of the oil storage tank 24 is connected to the heat exchanger II 14 heat transfer oil side inlet inside the fuel system 11 via the circulation pump 23. The heat transfer oil side outlet of the heat exchanger II 14 flows back to the oil storage tank 24, forming a medium-side closed secondary heat transfer oil circulation loop. An overflow return port is provided at the top of the oil storage tank 24. The overflow return port is connected to the return port of the heat transfer oil unit 1, which is used to return excess heat transfer oil when the liquid level exceeds the limit, so as to maintain the stability of the liquid level in the tank.

[0027] The environmental chamber 6 is a sealed test chamber, which contains a heat exchanger I7, a circulating fan 8, a temperature sensor I9, and a pressure relief valve 10. The heat exchanger I7 is used to increase the heat exchange contact area between the heat transfer oil and the air inside the chamber; the circulating fan 8 is installed on the side of the heat exchanger I7 to drive the forced circulation of air inside the chamber, thereby improving heat exchange efficiency and balancing the temperature field inside the chamber; the temperature sensor I9 is ​​located in the core test area of ​​the environmental chamber 6 to collect the ambient temperature inside the chamber in real time; the pressure relief valve 10 is installed on the side wall of the environmental chamber 6 to balance the pressure difference between the inside and outside of the chamber and ensure the safe operation of the chamber.

[0028] The fuel system 11 provides fuel medium at a set pressure and temperature to the test specimen. Internally, it includes a fuel tank 15, an oil filter 16, a fuel pump 17, an oil filter 18, a safety valve 19, a pressure sensor 20, a heat exchanger II 14, a temperature sensor II 21, the test specimen 12, and a three-way valve 13. The fuel outlet of the fuel tank 15 is connected to the fuel inlet of the fuel pump 17 via the oil filter 16. The fuel outlet of the fuel pump 17 is connected to the fuel-side inlet of the heat exchanger II 14 via the oil filter 18. A safety valve 19 is connected in parallel on the fuel outlet line of the fuel pump 17, and the overflow port of the safety valve 19 is connected to the fuel tank 15 for automatic pressure relief when the line pressure exceeds the limit. A pressure sensor 20 is also installed on the fuel outlet line of the fuel pump 17 for real-time acquisition of fuel supply pressure data. The fuel outlet of heat exchanger II 14 is connected to the inlet of test piece 12, and the outlet of test piece 12 is connected to the inlet of three-way valve 13. The first outlet of three-way valve 13 is connected to the inlet of fuel pump 17, forming a small fuel supply loop. The second outlet of three-way valve 13 is connected to the return port of fuel tank 15, forming a main return loop. Temperature sensor II 21 is installed at the inlet line of test piece 12 to collect the temperature of the fuel medium entering the test piece in real time.

[0029] Control system 3 is the system's control unit and can be a PLC controller. The signal output terminals of temperature sensor I9 and temperature sensor II21 are electrically connected to the signal input terminals of control system 3, and the signal output terminal of pressure sensor 20 is also connected to control system 3. The control output terminals of control system 3 are electrically connected to the control terminals of flow regulating valve I4, flow regulating valve II2, circulating pump 23, oil supply pump 17, and three-way valve 13, respectively. The central control computer 5 is electrically connected to control system 3 and is used to issue commands such as temperature setpoints and operating mode selections, while simultaneously displaying real-time operating status data such as temperature, pressure, and valve opening at each measuring point in the system.

[0030] Example 2: Figure 2 The diagram shows a flowchart of a single ambient temperature control mode of an exemplary embodiment of the present invention for a method for integrated control of ambient temperature and medium temperature of external energy storage. In this embodiment, the integrated control system for ambient temperature and medium temperature of external energy storage only performs temperature control of the ambient chamber 6, the flow regulating valve II2 remains closed, and the medium-side branch stops operating.

[0031] During the low-temperature environmental test, the operator issues the low-temperature environmental setpoint via the central control computer 5. The heat transfer oil unit 1 outputs low-temperature heat transfer oil at a constant temperature. This low-temperature heat transfer oil enters the heat exchanger 7 via the flow regulating valve I4, exchanges heat with the air in the environmental chamber 6, and then flows back to the heat transfer oil unit 1. During operation, the circulating fan 8 continuously operates, driving forced convection of air within the chamber, accelerating the heating and cooling rate, and ensuring a uniform temperature field. The temperature sensor I9 collects the ambient temperature in real time and feeds it back to the control system 3. The control system 3 performs closed-loop calculations between the feedback temperature and the set temperature, and then outputs a control signal to adjust the opening of the flow regulating valve I4, changing the flow rate of the heat transfer oil entering the heat exchanger I7, thus forming a closed-loop control of the ambient temperature. When the ambient temperature drops to the setpoint, the flow regulating valve I4 maintains the corresponding opening to compensate for cold leakage from the chamber and maintain long-term stability of the ambient temperature.

[0032] During high-temperature environmental testing, heat transfer oil unit 1 switches to heating mode, outputting high-temperature heat transfer oil at a constant temperature. The control logic is consistent with that of the low-temperature mode, and precise and stable control of the high-temperature environment is achieved by adjusting the opening of the flow regulating valve I4.

[0033] Example 3: Figure 3 The diagram shows a flowchart of the single medium temperature control mode of the integrated control method for ambient temperature and medium temperature of external energy storage provided by an exemplary embodiment of the present invention. In this embodiment, the integrated control system for ambient temperature and medium temperature of external energy storage only performs temperature control of the fuel medium, the flow regulating valve I4 remains closed, and the ambient side branch stops operating.

[0034] During the low-temperature test, the operator issues the low-temperature setpoint through the central control computer 5. The heat transfer oil unit 1 outputs low-temperature heat transfer oil at a constant temperature, which is then injected into the oil storage tank 24 via the flow regulating valve II2. The control system 3 maintains stable liquid level and oil temperature in the oil storage tank 24 by adjusting the opening of the flow regulating valve II2. After the circulating pump 23 starts, it draws the low-temperature heat transfer oil from the oil storage tank 24 and sends it to the heat exchanger II14. After heat exchange with the fuel oil, the oil flows back to the oil storage tank 24. The fuel supply pump 17 starts simultaneously, pressurizing the fuel oil in the fuel tank 15 and sending it to the heat exchanger II14 for heat exchange and cooling. The cooled fuel oil is then introduced into the test piece 12. The temperature sensor II21 collects the fuel oil temperature in real time and feeds it back to the control system 3. After calculation, the control system 3 outputs a frequency converter signal to adjust the speed of the circulating pump 23, changing the flow rate of the heat transfer oil in the heat exchanger II14, thus forming a closed-loop control of the medium temperature. Once the fuel temperature drops to the set value, the circulation pump 23 maintains the corresponding speed to compensate for cold leakage in the pipeline and keep the medium temperature stable. During the test, the large-capacity constant-temperature heat transfer oil stored in the oil storage tank 24 can buffer the sudden changes in heat exchange caused by power fluctuations in the test piece 12, reduce the temperature shock on the medium side, and improve the stability of temperature control.

[0035] During the high-temperature test of the medium, the heat transfer oil unit 1 switches to heating mode, outputting high-temperature heat transfer oil at a constant temperature, with the medium-side temperature control logic consistent with the low-temperature mode. Simultaneously, the control system 3 adjusts the opening of the three-way valve 13, ensuring that all the high-temperature fuel oil from the outlet of the test piece 12 flows back through the first outlet to the inlet of the fuel supply pump 17, forming a small circulation loop. This prevents the high-temperature fuel oil from directly flowing back to the oil tank 15, avoiding excessive overall oil temperature in the tank and eliminating potential safety hazards during high-temperature operation. When the pipeline pressure exceeds the safety threshold, the safety valve 19 automatically opens to release pressure, allowing the overflowing fuel to flow back to the oil tank 15, ensuring the safe operation of the fuel supply circuit.

[0036] Example 4: Figure 4 The diagram shows a flowchart of the synchronous temperature control mode of the integrated control method for ambient temperature and medium temperature of external energy storage provided by an exemplary embodiment of the present invention. In this embodiment, the integrated control system for ambient temperature and medium temperature of external energy storage simultaneously controls the ambient temperature and medium temperature. Flow regulating valve I4 and flow regulating valve II2 are opened simultaneously, and the two heat transfer oil branches run in parallel.

[0037] The heat transfer oil unit 1 outputs constant-temperature heat transfer oil at a set temperature, which is then delivered to the environmental chamber 6 and the oil storage tank 24 via two branches. On the environmental side, the temperature inside the environmental chamber 6 is controlled in a closed loop via flow regulating valve I4, while on the medium side, the fuel medium temperature is controlled by frequency conversion via circulating pump 23. The two control loops are decoupled and operate independently, allowing for the setting of different target temperatures to simultaneously simulate the combined environmental and medium temperature conditions during the service of aero-engine accessories. The closed-loop control logic, energy storage buffer mechanism, and high-temperature safety control logic on the environmental and medium sides are consistent with those in Examples 2 and 3, respectively.

[0038] In summary, this technical solution adopts a dual-path parallel architecture with the same source heat transfer oil, which can simultaneously achieve independent closed-loop control of ambient temperature and fuel medium temperature, reproduce the comprehensive temperature conditions of aero-engine accessories in service, improve the condition fit and fault detection capability of ground tests, reduce the configuration of independent power units compared with discrete temperature control solutions, and improve equipment integration. An external oil storage tank is set up to construct a buffer energy storage branch, which can smooth out the sudden changes in heat exchange caused by drastic power fluctuations of the test piece, weaken the temperature shock on the medium side, and improve the operational stability and control accuracy of the medium temperature control. A variable frequency circulating pump is used on the medium side to independently control the heat exchange flow, decoupled from the ambient side regulating valve temperature control loop, ensuring that the two temperature control paths do not interfere with each other. Under high-temperature medium test conditions, a small circulation loop is constructed on the fuel supply side through a three-way valve to block the direct return of high-temperature fuel to the fuel tank, preventing the overall fuel tank temperature from exceeding the limit and eliminating safety hazards during high-temperature operation. A built-in circulating fan in the ambient chamber enhances convective heat transfer, improves the uniformity and stability of the temperature field inside the chamber, and accelerates the temperature rise and fall response rate.

[0039] In the embodiments disclosed in this invention, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this invention according to the specific circumstances.

[0040] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for comprehensively controlling the ambient temperature and medium temperature of an external energy storage system, characterized in that, include: The heat transfer oil unit outputs heat transfer oil at a constant temperature and divides the output into two paths; The first stream of heat transfer oil is delivered to heat exchanger I in the environmental chamber via flow regulating valve I. After exchanging heat with the air inside the environmental chamber, it flows back to the heat transfer oil unit. The control system collects the temperature signal from temperature sensor I in the environmental chamber, calculates it with the set value of the ambient temperature, and outputs a control signal to flow regulating valve I to regulate the flow rate of the first stream of heat transfer oil, thereby realizing closed-loop control of the temperature inside the environmental chamber. The second heat transfer oil is delivered to the oil storage tank via flow regulating valve II to maintain the temperature and level of the heat transfer oil in the oil storage tank; the circulating pump draws heat transfer oil from the oil storage tank and delivers it to heat exchanger II in the fuel system to exchange heat with the fuel medium in the fuel system; the control system collects the medium temperature signal in the fuel system, calculates it with the medium temperature setpoint, and outputs a control signal to the circulating pump to adjust the circulating pump speed to change the heat transfer oil flow rate of heat exchanger II, thereby realizing closed-loop control of the fuel medium temperature; By storing heat transfer oil at a set temperature in an oil storage tank, the heat exchange changes caused by power fluctuations in the test specimen are buffered, reducing the temperature shock of the fuel medium.

2. The method for integrated control of ambient temperature and medium temperature for external energy storage according to claim 1, characterized in that, The method supports a separate ambient temperature control mode: With flow control valve II closed, only the first heat transfer oil circuit is operated. By adjusting the cooling or heating power of the heat transfer oil unit and the opening of flow control valve I, the low-temperature or high-temperature control of the environmental chamber can be achieved. The method supports individual medium temperature control modes: With flow control valve I closed, only the second heat transfer oil circuit is operated. By adjusting the cooling or heating power of the heat transfer oil unit, the opening of flow control valve II, and the speed of the circulating pump, the low-temperature or high-temperature control of the fuel medium is achieved. The method supports synchronous temperature control mode: Simultaneously opening flow regulating valve I and flow regulating valve II allows the two heat transfer oils to operate in parallel, achieving closed-loop control of the ambient chamber temperature and the fuel medium temperature.

3. The method for integrated control of ambient temperature and medium temperature for external energy storage according to claim 2, characterized in that, When high-temperature medium temperature regulation is carried out, the fuel supply pump in the fuel system outputs fuel at a set pressure, and the fuel flows through heat exchanger II and then passes through the test piece; The control system adjusts the opening of the three-way valve to ensure that all the fuel at the outlet of the test piece flows back to the inlet of the fuel supply pump, thus preventing the high-temperature fuel from flowing back to the fuel tank.

4. The method for integrated control of ambient temperature and medium temperature for external energy storage according to claim 1, characterized in that, During the ambient temperature control process, the circulating fan inside the environmental chamber runs continuously, driving the internal air circulation, enhancing the heat exchange efficiency between heat exchanger I and the air, and balancing the temperature distribution inside the environmental chamber.

5. A system for integrated control of ambient temperature and medium temperature for external energy storage, wherein the system is applied in the method for integrated control of ambient temperature and medium temperature for external energy storage as described in any one of claims 1 to 4, characterized in that, The system includes: The oil storage tank (24) has its outlet connected to the heat exchanger II (14) heat transfer oil inlet inside the fuel system (11) via the circulation pump (23); The heat transfer oil unit (1) has two outlets. The first outlet is connected to the inlet of the heat exchanger I (7) inside the environmental box (6) via the flow regulating valve I (4). The outlet of the heat exchanger I (7) is connected to the return outlet of the heat transfer oil unit (1). The second outlet is connected to the inlet of the oil storage tank (24) via the flow regulating valve II (2). The environmental chamber (6) is equipped with a temperature sensor I (9), and the fuel system (11) is equipped with a temperature sensor II (21). Both the temperature sensor I (9) and the temperature sensor II (21) are electrically connected to the input terminal of the control system (3). The output terminal of the control system (3) is electrically connected to the control terminal of the flow regulating valve I (4), the flow regulating valve II (2), and the circulation pump (23), respectively.

6. The integrated temperature and medium temperature control system with external energy storage according to claim 5, characterized in that, The environmental chamber (6) is also equipped with: A circulating fan (8) is used to drive the air circulation inside the environmental chamber (6); Pressure relief valve (10) is used to balance the internal and external pressures of the environmental chamber (6).

7. The integrated temperature and medium temperature control system with external energy storage according to claim 5, characterized in that, The fuel system (11) includes a fuel tank (15), a fuel pump (17), a heat exchanger II (14), a test piece (12), and a three-way valve (13). The oil outlet of the oil tank (15) is connected to the oil inlet of the oil supply pump (17), the oil outlet of the oil supply pump (17) is connected to the fuel oil inlet of the heat exchanger II (14), the fuel oil outlet of the heat exchanger II (14) is connected to the oil inlet of the test piece (12), the oil outlet of the test piece (12) is connected to the oil inlet of the three-way valve (13); the first oil outlet of the three-way valve (13) is connected to the oil inlet of the oil supply pump (17), and the second oil outlet of the three-way valve (13) is connected to the return oil port of the oil tank (15).

8. The integrated temperature and medium temperature control system with external energy storage according to claim 7, characterized in that, The oil supply pump (17) is provided with an oil filter (16) on the oil inlet side and an oil filter (18) on the oil outlet side; a safety valve (19) and a pressure sensor (20) are also provided on the oil outlet pipeline of the oil supply pump (17), and the overflow port of the safety valve (19) is connected to the oil tank (15).

9. The integrated temperature and medium temperature control system with external energy storage according to claim 5, characterized in that, The system also includes a central control computer (5), which is electrically connected to the control system (3) and is used to input temperature setting parameters and operating mode commands, and to display system operating status data.

10. The integrated control system for ambient temperature and medium temperature with external energy storage according to claim 5, characterized in that, The heat exchanger II (14) has its heat transfer oil outlet connected to the oil storage tank (24) to form a closed secondary heat transfer oil circulation loop. The oil storage tank (24) is equipped with an overflow return port, which is connected to the return port of the heat transfer oil unit (1).

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