Multi-medium alternate cooperative thermal control system and aircraft

Abstract

The invention provides a multi-medium alternate collaborative thermal control system and an aircraft, the thermal control system provides sufficient and stable pressurized gas through a supercharging device, and the supercharging device is connected with a working medium storage tank and a blow-off pipeline through a shunt pipeline; a working medium storage tank is used for storing and carrying enough working medium needing to be consumed in the thermal control process, one end of the storage tank is connected with a supercharging device, and the other end of the storage tank is connected with an eight-way valve; the multiple pipelines in the eight-way valve, the flash evaporation cavity of the multi-flow-path heat exchanger and the multi-flow-path flowing boiling cavity are matched with an appropriate control strategy, and free switching of supply of different working media and independent selection of different working modes such as a pipeline blowing mode and a thermal control mode can be achieved. According to the technical scheme, the technical problem that in the prior art, a traditional heat dissipation technology cannot continuously provide stable heat sink is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of efficient thermal management of aircraft, and in particular to a multi-medium alternating collaborative thermal control system and an aircraft. Background Art

[0002] The ascent and reentry process of wide-range high-speed aircraft faces thermal barrier problems caused by high-speed flight aerodynamic heating, resulting in an extremely harsh cabin environment. At the same time, the increase in the power level of airborne equipment has brought new challenges to the thermal control of high-speed aircraft. Compared with traditional aviation and aerospace heat dissipation technologies such as air / fuel cooling and radiator heat dissipation, they cannot adapt to the wide-range, high-speed, and unpowered flight characteristics of high-speed aircraft. Consumable heat sinks use the heat absorption processes such as the heat capacity, phase change, and chemical change of the material itself to dissipate heat. They have the advantages of high heat dissipation power, high heat exchange efficiency, and high heat flux density, and have become an effective technical approach to solve this problem. However, due to the different temperature and power requirements of the thermal control system, a single consumable heat sink device cannot meet the use requirements, and a combination of multiple different working fluids is required to achieve the established thermal control requirements, which results in an exponential increase in the overall mass cost of the system. At the same time, considering the different efficiencies of the working fluid in different phase change processes, the same thermal control requirements require very different working fluid masses. Therefore, in scenarios where multiple consumable working fluids must be used for thermal control, designing a highly integrated thermal control system that is suitable for multiple media, has different working modes, and can switch between the modes freely and coordinately is of extraordinary significance for reducing the overall mass of the aircraft.

[0003] However, judging from various publicly available information and literature at home and abroad, in the field of efficient thermal management of aircraft, there is currently no relevant information on thermal management of aircraft using a thermal control system that uses a variety of different consumable media to work alternately and collaboratively. Summary of the invention

[0004] The present invention provides a multi-medium alternating cooperative thermal control system and an aircraft, which can solve the technical problem in the prior art that traditional heat dissipation technology cannot continuously provide a stable heat sink.

[0005] According to one aspect of the present invention, a multi-medium alternating cooperative thermal control system is provided, the thermal control system comprising:

[0006] A boosting device, the boosting device comprises a boosting gas cylinder, a boosting pipeline, a pressure reducing valve and a shunt pipeline, the boosting gas cylinder is used to store a boosting gas with a preset pressure, the shunt pipeline has an input port, a first shunt outlet, a second shunt outlet and a third shunt outlet, the boosting pipeline is respectively connected to the input port of the boosting gas cylinder and the shunt pipeline, and the pressure reducing valve is arranged on the boosting pipeline;

[0007] An eight-way valve, wherein the eight-way valve has a first passage, a second passage, a third passage and a fourth passage;

[0008] The purge pipeline comprises a purge pipeline body and a purge pipeline control valve arranged thereon, one end of the purge pipeline body is connected to the first diversion outlet, and the other end is connected to the eight-way valve;

[0009] A first working fluid storage and delivery pipeline, the first working fluid storage and delivery pipeline comprises a first working fluid delivery pipeline body and a first working fluid storage tank, a first inlet control valve and a first outlet control valve arranged thereon, the first working fluid storage tank is used to store a first liquid cooling working fluid, the first inlet control valve is located at the inlet side of the first working fluid storage tank, the first outlet control valve is located at the outlet side of the first working fluid storage tank, one end of the first working fluid delivery pipeline body is connected to the second diversion outlet, and the other end is connected to the eight-way valve;

[0010] A second working fluid storage and delivery pipeline, the second working fluid storage and delivery pipeline comprises a second working fluid delivery pipeline body and a second working fluid storage tank, a second inlet control valve and a second outlet control valve arranged thereon, the second working fluid storage tank is used to store a second liquid cooling working fluid, the second liquid cooling working fluid and the first liquid cooling working fluid are different cooling working fluids, the second inlet control valve is located at the inlet side of the second working fluid storage tank, the second outlet control valve is located at the outlet side of the second working fluid storage tank, one end of the second working fluid delivery pipeline body is connected to the third diversion outlet, and the other end is connected to the eight-way valve;

[0011] A multi-channel heat exchanger, the multi-channel heat exchanger comprises a hot fluid circulation pipeline, an outer sleeve structure and an inner sleeve structure, the inner sleeve structure is arranged inside the outer sleeve structure, the reserved space between the inner sleeve structure and the inner sleeve structure constitutes a flash chamber, the inner sleeve structure has a flow boiling chamber, the flash chamber and the flow boiling chamber are directly connected to the external environment, and the hot fluid circulation pipeline is wound around the inner sleeve structure;

[0012] A flash pipeline, the flash pipeline comprises a flash pipeline body and a flash nozzle, one end of the flash pipeline body is connected to the flash chamber through the flash nozzle, and the other end is connected to the eight-way valve;

[0013] A flow boiling pipeline, one end of which passes through the outer sleeve structure and is communicated with the flow boiling cavity of the inner sleeve structure, and the other end of which is connected with the eight-way valve;

[0014] An additional auxiliary cooling unit, the additional auxiliary cooling unit comprises an additional auxiliary cooling pipeline inlet section and an additional auxiliary cooling pipeline outlet section, one end of the additional auxiliary cooling pipeline inlet section is connected to the external auxiliary liquid cooling medium, and the other end is connected to the eight-way valve, and the additional auxiliary cooling pipeline outlet section is connected to the flow boiling cavity;

[0015] By rotating the eight-way valve to adjust the interface positions of the first passage, the second passage, the third passage and the fourth passage, the purge pipeline body, the first working fluid delivery pipeline body and the second working fluid delivery pipeline body are connected to the flash pipeline body, the flow boiling pipeline and the inlet section of the additional auxiliary cooling pipeline respectively, and the pressure reducing valve, the purge pipeline control valve, the first inlet control valve, the first outlet control valve, the second inlet control valve and the second outlet control valve are cooperated to switch to the first liquid cooling working fluid flash cooling mode, the first liquid cooling working fluid boiling cooling mode, the second liquid cooling working fluid flash cooling mode, the second liquid cooling working fluid boiling cooling mode, the flash chamber purge mode, the flow boiling chamber purge mode or the auxiliary liquid cooling working fluid convection heat exchange cooling mode respectively, and the hot fluid in the hot fluid circulation pipeline is cooled by the flash cooling mode, the boiling cooling mode or the convection heat exchange cooling mode.

[0016] Furthermore, the thermal control system also includes a temperature sensor and a controller. The temperature sensor is arranged at the inlet and outlet of the hot fluid circulation pipeline, and is used to monitor the pre-cooling temperature and post-cooling temperature of the hot fluid flowing into and out of the hot fluid circulation pipeline. The controller is connected to the temperature sensor and the pressure reducing valve, respectively, and is used to control the opening of the pressure reducing valve according to the pre-cooling temperature and the post-cooling temperature to adjust the saturated pressure and temperature of the first liquid cooling medium and the second liquid cooling medium.

[0017] Furthermore, the outer walls of the first working fluid storage tank and the second working fluid storage tank are both paved with automatic temperature-regulating heating films, and the saturated pressure and temperature of the first liquid cooling working fluid and the second liquid cooling working fluid are adjusted by the heating films.

[0018] Furthermore, a gas-liquid separation device is provided inside the first working fluid storage tank and the second working fluid storage tank, and the gas-liquid separation device is used to separate the pressurized gas from the first liquid cooling working fluid or the second liquid cooling working fluid, and squeeze out the first liquid cooling working fluid or the second liquid cooling working fluid under the push of the pressurized gas.

[0019] Furthermore, the gas-liquid separation device is an elastic bag or a mechanically compressible component.

[0020] Furthermore, the inner sleeve structure includes a plurality of circular or square pipes arranged in parallel, and the inner cavity of the circular or square pipes serves as a flow boiling chamber.

[0021] Furthermore, the spacing between the circular or square pipes is 20 to 50 mm, and the equivalent diameter is 5 to 20 mm.

[0022] Furthermore, the equivalent diameter of the thermal fluid circulation pipeline is 5 to 20 mm.

[0023] Furthermore, the first liquid cooling medium, the second liquid cooling medium and the external auxiliary liquid cooling medium are all selected from one of water, liquid nitrogen, liquid ammonia or R134a.

[0024] According to another aspect of the present invention, there is provided an aircraft, the aircraft comprising the multi-medium alternating cooperative thermal control system proposed above in the present invention.

[0025] The technical solution of the present invention is applied to provide a multi-media alternating collaborative thermal control system and an aircraft. The thermal control system provides sufficient and stable pressurized gas through a booster device, and the booster device is connected to the working fluid storage tank and the blow-off pipeline respectively through a shunt pipeline; the working fluid storage tank stores and carries sufficient working fluids needed for thermal control, one end of the storage tank is connected to the booster device, and the other end is connected to an eight-way valve; through multiple pipelines in the eight-way valve and the flash evaporation chamber and multi-flow boiling chamber of the multi-flow heat exchanger, with appropriate control strategies, it is possible to realize the free switching of different working fluid supplies and the autonomous selection of different working modes such as pipeline blow-off and thermal control mode; a two-phase evaporation and boiling heat transfer mechanism of multi-fluid working fluids is formed, which greatly improves the deficiencies of thermal control power, thermal control temperature and other capabilities brought about by a single working fluid and a single phase change mode of the traditional thermal control system, and continuously provides stable heat sinks. In addition, the multi-media alternating collaborative thermal control system has multiple working fluids sharing one multi-fluid heat exchanger, which has obvious advantages in terms of system comprehensive quality cost and is suitable for high-speed aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The included drawings are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the text description, explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic diagram showing the connection relationship of a multi-medium alternating cooperative thermal control system provided according to a specific embodiment of the present invention is shown;

[0028] Figure 2 It shows one of the working modes provided in a specific embodiment of the present invention, in which the first liquid cooling medium implements the flow boiling mode, and the eight-way valve gear is in gear A at this time;

[0029] Figure 3 It shows one of the working modes provided in a specific embodiment of the present invention, in which the first liquid cooling medium implements the flash evaporation mode, and the eight-way valve gear position is in gear E;

[0030] Figure 4 It shows one of the working modes provided in a specific embodiment of the present invention, in which the second liquid cooling medium implements the flow boiling mode, and the eight-way valve gear is in gear F at this time;

[0031] Figure 5It shows one of the working modes provided in a specific embodiment of the present invention, in which the second liquid cooling medium implements the flash evaporation mode, and the eight-way valve is in the C gear;

[0032] Figure 6 It shows one of the working modes provided by the specific embodiment of the present invention, in which the flow boiling chamber and the pipeline are blown off, and the eight-way valve is in gear B at this time;

[0033] Figure 7 It shows one of the working modes provided in the specific embodiment of the present invention, in which the flash chamber and the pipeline are blown off, and the eight-way valve is in gear A at this time;

[0034] Figure 8 It shows one of the working modes provided in a specific embodiment of the present invention, in which an additional auxiliary cooling pipeline implements auxiliary thermal control, and the eight-way valve is in gear E at this time;

[0035] Fig. 9 A schematic structural diagram of a multi-flow path heat exchanger provided according to a specific embodiment of the present invention is shown.

[0036] The above drawings include the following reference numerals:

[0037] 1. Pressurized gas cylinder; 2. Pressure reducing valve; 3. Diverter pipeline; 4. Blow-off pipeline control valve; 5. First inlet control valve; 6. First working fluid storage tank; 7. First outlet control valve; 8. Blow-off pipeline body; 9. Flow boiling pipeline; 10. Flash pipeline body; 11. Flash nozzle; 12. Flash chamber; 13. Flow boiling chamber; 14. Second inlet control valve; 15. Second working fluid storage tank; 16. Second outlet control valve; 17. Eight-way valve; 18. Thermal fluid circulation pipeline; 19. Outer sleeve structure; 20. Inner sleeve structure; 21. Flash nozzle interface; 22. Flow boiling pipeline inlet; 23. Low-pressure environment outlet; 24. Thermal fluid inlet; 25. Thermal fluid outlet. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0040] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0041] like Figure 1 As shown, according to a specific embodiment of the present invention, a multi-medium alternating cooperative thermal control system is provided, and the thermal control system includes:

[0042] A boosting device, the boosting device comprises a boosting gas cylinder 1, a boosting pipeline, a pressure reducing valve 2 and a shunt pipeline 3, the boosting gas cylinder 1 is used to store a boosted gas having a preset pressure, the shunt pipeline 3 has an input port, a first shunt outlet, a second shunt outlet and a third shunt outlet, the boosting pipeline is respectively connected to the input ports of the boosting gas cylinder 1 and the shunt pipeline 3, and the pressure reducing valve 2 is arranged on the boosting pipeline;

[0043] An eight-way valve 17, wherein the eight-way valve 17 has a first passage, a second passage, a third passage and a fourth passage;

[0044] The purge pipeline includes a purge pipeline body 8 and a purge pipeline control valve 4 disposed thereon, one end of the purge pipeline body 8 is connected to the first diversion outlet, and the other end is connected to the eight-way valve 17;

[0045] A first working fluid storage and delivery pipeline, the first working fluid storage and delivery pipeline comprises a first working fluid delivery pipeline body and a first working fluid storage tank 6, a first inlet control valve 5 and a first outlet control valve 7 arranged thereon, the first working fluid storage tank 6 is used to store a first liquid cooling working fluid, the first inlet control valve 5 is located at the inlet side of the first working fluid storage tank 6, the first outlet control valve 7 is located at the outlet side of the first working fluid storage tank 6, one end of the first working fluid delivery pipeline body is connected to the second diversion outlet, and the other end is connected to the eight-way valve 17;

[0046] A second working fluid storage and delivery pipeline, the second working fluid storage and delivery pipeline comprises a second working fluid delivery pipeline body and a second working fluid storage tank 15, a second inlet control valve 14 and a second outlet control valve 16 arranged thereon, the second working fluid storage tank 15 is used to store a second liquid cooling working fluid, the second liquid cooling working fluid and the first liquid cooling working fluid are different cooling working fluids, the second inlet control valve 14 is located at the inlet side of the second working fluid storage tank 15, the second outlet control valve 16 is located at the outlet side of the second working fluid storage tank 15, one end of the second working fluid delivery pipeline body is connected to the third diversion outlet, and the other end is connected to the eight-way valve 17;

[0047] A multi-channel heat exchanger, the multi-channel heat exchanger comprises a hot fluid circulation pipeline 18, an outer sleeve structure 19 and an inner sleeve structure 20, the inner sleeve structure 20 is arranged in the outer sleeve structure 19, the reserved space between the inner sleeve structure 20 and the inner sleeve structure 20 constitutes a flash chamber 12, the inner sleeve structure 20 has a flow boiling chamber 13, the flash chamber 12 and the flow boiling chamber 13 are directly connected to the external environment, and the hot fluid circulation pipeline 18 is wound around the inner sleeve structure 20;

[0048] Flash pipeline, the flash pipeline includes a flash pipeline body 10 and a flash nozzle 11, one end of the flash pipeline body 10 is connected to the flash chamber 12 through the flash nozzle 11, and the other end is connected to the eight-way valve 17;

[0049] A flow boiling pipeline 9, one end of which passes through the outer sleeve structure 19 and communicates with the flow boiling chamber 13 of the inner sleeve structure 20, and the other end of which is connected to the eight-way valve 17;

[0050] An additional auxiliary cooling unit, the additional auxiliary cooling unit comprises an additional auxiliary cooling pipeline inlet section and an additional auxiliary cooling pipeline outlet section, one end of the additional auxiliary cooling pipeline inlet section is connected to the external auxiliary liquid cooling medium, and the other end is connected to the eight-way valve 17, and the additional auxiliary cooling pipeline outlet section is connected to the flow boiling chamber 13;

[0051] By rotating the eight-way valve 17 to adjust the interface positions of the first passage, the second passage, the third passage and the fourth passage, the purge pipeline body 8, the first working fluid delivery pipeline body and the second working fluid delivery pipeline body are connected to the flash pipeline body 10, the flow boiling pipeline 9 and the inlet section of the additional auxiliary cooling pipeline respectively, and in conjunction with the pressure reducing valve 2, the purge pipeline control valve 4, the first inlet control valve 5, the first outlet control valve 7, the second inlet control valve 14 and the second outlet control valve 16, respectively switch to the first liquid cooling working fluid flash cooling mode, the first liquid cooling working fluid boiling cooling mode, the second liquid cooling working fluid flash cooling mode, the second liquid cooling working fluid boiling cooling mode, the flash chamber 12 purge mode, the flow boiling chamber 13 purge mode or the auxiliary liquid cooling working fluid convection heat exchange cooling mode, and cool the hot fluid in the hot fluid circulation pipeline 18 by the flash cooling mode, the boiling cooling mode or the convection heat exchange cooling mode.

[0052] By applying this configuration, a multi-media alternating collaborative thermal control system and an aircraft are provided. The thermal control system provides sufficient and stable pressurized gas through a booster device, and the booster device is connected to the working fluid storage tank and the blow-off pipeline respectively through a shunt pipeline; the working fluid storage tank stores and carries sufficient working fluids needed for thermal control, one end of the storage tank is connected to the booster device, and the other end is connected to an eight-way valve; through multiple pipelines in the eight-way valve and the flash chamber and multi-channel flow boiling chamber of the multi-channel heat exchanger, with appropriate control strategies, it is possible to realize the free switching of different working fluid supplies and the autonomous selection of different working modes such as pipeline blow-off and thermal control mode; a two-phase evaporation and boiling heat transfer mechanism of multi-fluid working fluids is formed, which greatly improves the shortcomings of thermal control power, thermal control temperature and other capabilities brought about by a single working fluid and a single phase change mode of the traditional thermal control system, and continuously provides stable heat sink. In addition, the multi-media alternating collaborative thermal control system has multiple working fluids sharing one multi-fluid heat exchanger, which has obvious advantages in terms of system comprehensive quality cost and is suitable for high-speed aircraft. Compared with the prior art, the technical solution of the present invention can solve the technical problem in the prior art that the traditional heat dissipation technology cannot continuously provide a stable heat sink.

[0053] Furthermore, in the embodiment of the present invention, the first working fluid storage tank 6 and the second working fluid storage tank 15 are both in the shape of an elongated cylinder, with the upper and lower ends being hemispherical, the pipelines at both ends of the working fluid storage tanks are coaxially arranged, and the first working fluid storage tank 6 and the second working fluid storage tank 15 are both provided with a gas-liquid separation device inside, and the gas-liquid separation device is used to separate the pressurized gas from the first liquid cooling working fluid or the second liquid cooling working fluid, and squeeze out the first liquid cooling working fluid or the second liquid cooling working fluid under the push of the pressurized gas. As a specific embodiment of the present invention, the gas-liquid separation device is an elastic bag or a mechanical compressible component. With this configuration, no matter what posture the aircraft is in, the entire thermal control system will not be affected by gravity and can stably output liquid cooling working fluid.

[0054] In order to realize the precise automatic temperature control and constant temperature function of the heat-generating components, in the embodiment of the present invention, the thermal control system also includes a temperature sensor and a controller. The temperature sensor is arranged at the inlet and outlet of the hot fluid circulation pipeline 18, and is used to monitor the pre-cooling temperature and post-cooling temperature of the hot fluid flowing into and out of the hot fluid circulation pipeline 18. The controller is connected to the temperature sensor and the pressure reducing valve 2 respectively, and is used to control the opening of the pressure reducing valve 2 according to the pre-cooling temperature and the post-cooling temperature to adjust the saturated pressure and temperature of the first liquid cooling medium and the second liquid cooling medium. Based on this, the boosting device has a self-feedback adjustment control function and a remote control function, which can be self-feedback adjusted through the controller through the feedback of the temperature sensor, and can also manually remotely adjust the opening of the pressure reducing valve 2 to control the pressure of the working fluid storage tank, that is, control the saturated pressure and temperature of the working fluid, and realize the control of the outlet temperature of the hot fluid.

[0055] In addition, in the embodiment of the present invention, the outer wall surfaces of the first working fluid storage tank 6 and the second working fluid storage tank 15 are paved with automatic temperature-adjusting heating films, and the saturated pressure and temperature of the first liquid cooling working fluid and the second liquid cooling working fluid are adjusted by the heating films. Through this configuration, the thermal control accuracy of the thermal control system can be further improved.

[0056] Furthermore, in the embodiment of the present invention, the multi-channel heat exchanger adopts a rectangular or cylindrical shape, and the shape is also adjusted according to the installation restrictions. The interior thereof includes a flash chamber 12, a multi-channel flow boiling chamber 13 and a hot fluid circulation pipeline 18. The steam exhaust ports of the flow boiling chamber 13 and the flash chamber 12 are located on the same side, with the steam exhaust port of the flow boiling chamber 13 in the middle and the steam exhaust port of the flash chamber 12 on the outside, both of which are connected to the external environment to form an open system, wherein the discharge interface diameter of the flow boiling chamber 13 is 10 to 100 mm, and the discharge interface diameter of the flash chamber 12 is 50 to 200 mm. Fig. 9 As shown, as a specific embodiment of the present invention, the inner sleeve structure 20 in the multi-flow heat exchanger includes a plurality of circular or square pipes arranged in parallel, and the internal cavity of the circular or square pipes serves as a flow boiling chamber 13. The spacing of the circular or square pipes is 20 to 50 mm, and the equivalent diameter is 5 to 20 mm. In addition, the flash pipe is connected to the flash chamber 12 through a plurality of flash nozzles 11, and the spacing between the flash nozzles 11 and the hot fluid circulation pipe 18 is 50 to 200 mm, and the equivalent diameter of the hot fluid circulation pipe 18 is 5 to 20 mm.

[0057] In addition, in the present invention, the types of the first liquid cooling medium, the second liquid cooling medium and the external auxiliary liquid cooling medium are determined according to actual conditions. As a specific embodiment of the present invention, the first liquid cooling medium, the second liquid cooling medium and the external auxiliary liquid cooling medium are all selected from one of water, liquid nitrogen, liquid ammonia or R134a.

[0058] In order to further understand the present invention, the following Figures 1 to 9 The multi-medium alternating cooperative thermal control system of the present invention is described in detail.

[0059] like Figure 1 and Fig. 9 As shown, a multi-media alternating cooperative thermal control system suitable for high-speed aircraft is provided, comprising: a boosting device, a working fluid storage tank, an eight-way valve 17 and a multi-channel heat exchanger, the boosting device comprises a boosting gas cylinder 1, a boosting pipeline, a pressure reducing valve 2 and a shunt pipeline 3, the pressure reducing valve 2 is located between the boosting gas cylinder 1 and the shunt pipeline 3, a pressure reducing valve 2 and a pressure stabilizing device (not shown in the figure) are arranged between the boosting pipeline and the shunt pipeline 3 to ensure the stability of the boosting pressure delivered; the shunt pipeline 3 is divided into three paths, which are respectively connected through the purge pipeline control valve 4, the first inlet control valve 5 and the second inlet control valve 6. The inlet control valve 14 is connected to the purge pipeline body 8, the first liquid working fluid storage tank 6 and the second liquid working fluid storage tank 15. The purge pipeline control valve 4, the first inlet control valve 5 and the second inlet control valve 14 are electromagnetic control valves, which can automatically or manually control the on-off and opening of each branch; the eight-way valve is cross-linked with six pipelines, namely, the working fluid 1 supply pipeline (the first working fluid delivery pipeline body), the working fluid 2 supply pipeline (the second working fluid delivery pipeline body), the purge pipeline body 8, the flash pipeline body 10, the flow boiling pipeline 9 and the additional auxiliary cooling pipeline In the inlet section, there are multiple pipelines inside the eight-way valve. By rotating the valve opening, the fluid (cooling medium or pressurized gas) can be freely introduced into different pipelines; the multi-flow heat exchanger includes an outer sleeve structure 19 and an inner sleeve structure 20. The space between the inner and outer sleeves constitutes a flash chamber 12. The inner sleeve structure includes multiple pipelines arranged in parallel. The cavity of the pipeline itself constitutes a multi-flow boiling chamber 13. A flash nozzle interface 21 is set on the top of the outer sleeve structure 19. The flash pipeline body 10 passes through the flash nozzle 1 set on the flash nozzle interface 21. 1 is connected to the flash chamber 12, the flow boiling pipeline 9 is connected to the multi-flow flow boiling chamber 13 through the flow boiling pipeline inlet 19, the multi-flow heat exchanger also includes a hot fluid circulation pipeline 18, the hot fluid circulation pipeline 18 is tightly wound around the outer wall of the multi-flow flow boiling chamber 13, the hot fluid flows into the flow boiling chamber 13 through the hot fluid inlet 24, and flows out of the flow boiling chamber 13 through the hot fluid outlet 25 after flash evaporation or boiling cooling. The flash chamber 12 and the multi-flow flow boiling chamber 13 are provided with coaxial steam dispersing ports on one side of the multi-flow heat exchanger, that is, Fig. 9 The medium and low pressure environment outlet 23 is connected to the environment outside the machine body; the steam exhaust port of the multi-flow boiling chamber 13 has the same interface specifications as the outlet section of the additional auxiliary cooling pipeline, and has a quick disassembly function.

[0060] like Figure 1As shown, the boosting device drives the liquid cooling medium or the boosting gas to flow from the three pipelines on the left side of the eight-way valve 17 into the corresponding pipelines on the right side of the eight-way valve 17 according to the preset working mode of the eight-way valve 17, and enters the flash chamber 12 or the flow boiling chamber 13 in the multi-channel heat exchanger through the flash pipeline or the flow boiling pipeline for phase change heat exchange, and the liquid working medium absorbs the heat of the hot fluid in the hot fluid circulation pipeline 9 and is converted into a gaseous working medium, and is discharged to the outside of the machine body through the corresponding steam exhaust port.

[0061] like Figures 2 to 8 As shown, in this embodiment, multiple working modes of the eight-way valve 17 at various gears are provided, specifically, Figure 2 As shown, the eight-way valve 17 is in gear A, and the first liquid cooling medium implements the flow boiling mode; Figure 3 As shown, the eight-way valve 17 is in gear E, and the first liquid cooling medium implements the flash evaporation mode; Figure 4 As shown, the eight-way valve 17 is in gear F, and the second liquid cooling medium implements the flow boiling mode; Figure 5 As shown, the eight-way valve 17 is in gear C, and the second liquid cooling medium implements the flash evaporation mode; Figure 6 As shown, the eight-way valve 17 is in gear B, and the flowing boiling chamber and pipeline are blown off; Figure 7 As shown, the eight-way valve 17 is in gear A, and the flash chamber and pipeline are purged; Figure 8 As shown, the eight-way valve 17 is in the E gear, and the additional auxiliary cooling pipeline implements auxiliary thermal control.

[0062] In the above embodiment, for a single thermal control task, two or more of the seven working modes may be used as needed. In the above embodiment, the size, shape, etc. of the multi-flow heat exchanger are not specified. In actual application, it is necessary to make a refined design according to the installation location, space, etc. In addition, in order to reduce the flow resistance of the working fluid steam in the flowing boiling chamber and the flash chamber, the channel size can be specifically designed according to the actual situation.

[0063] Taking the flash evaporation mode of the first liquid cooling medium as an example, the working principle of the thermal control system provided by the present invention is: under the drive of the boosting gas cylinder 1, after the boosting gas is reduced to the target pressure through the pressure reducing valve 2, the first inlet control valve 5 is opened to allow the boosting gas to enter the first liquid cooling medium storage tank 6, forcing the liquid medium in the storage tank to enter the eight-way valve 17. At this time, the eight-way valve 17 is adjusted to the E gear, and the liquid medium enters the flash nozzle 11 at the top of the multi-channel heat exchanger through the flash evaporation pipeline body 10. The first liquid cooling medium enters the low-pressure environment and instantly flash vaporizes to absorb heat, absorbing the heat of the hot fluid in the hot fluid circulation pipeline 18, ensuring that the outlet temperature of the fluid medium in the circulation pipeline is always at a low value, and then the thermal control of each device is performed through the fluid circulation pipeline.

[0064] Taking the typical thermal control of full flight conditions as an example, the alternating collaborative working mode of the multi-media alternating collaborative thermal control system is as follows:

[0065] 1) Before takeoff, during the ground auxiliary cooling stage, the eight-way valve 17 is in position E, and the inlet section and outlet section of the additional auxiliary cooling pipeline are connected to the eight-way valve port and the steam exhaust port respectively. The additional cold fluid enters the flow boiling chamber 13 through the inlet section, the eight-way valve 17 and the flow boiling chamber pipeline 9, and flows out from the outlet section of the additional auxiliary cooling pipeline to cool the fluid in the hot fluid circulation pipeline 18 by means of convection heat transfer and heat conduction, as shown in FIG. Figure 8 As shown;

[0066] 2) During the flight phase, the additional auxiliary pipeline is disconnected, and the first liquid cooling medium is subjected to flash thermal control. At this time, the eight-way valve 17 is in position E, and the pressure reducing valve 2, the first inlet control valve 5 and the first outlet control valve 7 are opened. Figure 3 As shown;

[0067] 3) During the flight phase, the working fluid in the flash pipeline is blown off. At this time, the eight-way valve 17 is in position A, and the pressure reducing valve 2 and the blow-off pipeline control valve 4 are opened. Figure 7 As shown;

[0068] 4) During the flight phase, the second liquid cooling medium implements the flash evaporation thermal control condition. At this time, the eight-way valve 17 is at position C, and the pressure reducing valve 2, the second inlet control valve 5 and the second outlet control valve 16 are opened. Figure 5 As shown;

[0069] 5) In the return phase, ground auxiliary cooling is implemented again, the eight-way valve 17 is in position E, the inlet section and outlet section of the additional auxiliary cooling pipeline are connected to the port of the eight-way valve 17 and the steam exhaust port respectively, and the cooling process of 1) is repeated.

[0070] According to another aspect of the present invention, an aircraft is provided, the aircraft comprising the multi-medium alternating cooperative thermal control system proposed in the present invention. Since the multi-medium alternating cooperative thermal control system proposed in the present invention can greatly improve the deficiencies of thermal control power, thermal control temperature and other capabilities caused by a single working fluid and a single phase change mode of a traditional thermal control system, and continuously provide a stable heat sink, therefore, applying it to an aircraft, especially a high-speed aircraft, can significantly improve its flight performance.

[0071] In summary, the present invention provides a multi-media alternating collaborative thermal control system and an aircraft, wherein the thermal control system provides sufficient and stable pressurized gas through a booster device, and the booster device is connected to a working fluid storage tank and a blow-off pipeline respectively through a shunt pipeline; a sufficient amount of working fluid required for thermal control is stored and carried in a working fluid storage tank, one end of the storage tank is connected to the booster device, and the other end is connected to an eight-way valve; through multiple pipelines in the eight-way valve and a flash chamber and a multi-channel flow boiling chamber of a multi-channel heat exchanger, in combination with appropriate control strategies, it is possible to realize free switching of different working fluid supplies and autonomous selection of different working modes such as pipeline blow-off and thermal control mode; a two-phase evaporation and boiling heat transfer mechanism of multi-fluid working fluids is formed, which greatly improves the deficiencies of thermal control power, thermal control temperature and other capabilities brought about by a single working fluid and a single phase change mode of a traditional thermal control system, and continuously provides stable heat sinks. In addition, a multi-media alternating collaborative thermal control system in which multiple working fluids share a multi-fluid heat exchanger has obvious advantages in terms of system comprehensive quality cost, and is suitable for high-speed aircraft. Compared with the prior art, the technical solution of the present invention can solve the technical problem in the prior art that the traditional heat dissipation technology cannot continuously provide a stable heat sink.

[0072] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0073] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-medium alternating collaborative thermal control system, characterized in that: The thermal control system comprises: A pressurizing device, the pressurizing device comprising a pressurizing gas cylinder, a pressurizing pipeline, a pressure reducing valve and a shunt pipeline, the pressurizing gas cylinder is used to store pressurized gas with a preset pressure, the shunt pipeline has an input port, a first shunt outlet, a second shunt outlet and a third shunt outlet, the pressurizing pipeline is connected to the pressurizing gas cylinder and the input port of the shunt pipeline respectively, and the pressure reducing valve is arranged on the pressurizing pipeline; An eight-way valve, wherein the eight-way valve has a first passage, a second passage, a third passage and a fourth passage; A blow-off pipeline, the blow-off pipeline comprising a blow-off pipeline body and a blow-off pipeline control valve disposed thereon, one end of the blow-off pipeline body being connected to the first diversion outlet, and the other end being connected to the eight-way valve; a first working fluid storage and delivery pipeline, wherein the first working fluid storage and delivery pipeline comprises a first working fluid delivery pipeline body and a first working fluid storage tank, a first inlet control valve and a first outlet control valve arranged thereon, wherein the first working fluid storage tank is used to store a first liquid cooling working fluid, the first inlet control valve is located at the inlet side of the first working fluid storage tank, the first outlet control valve is located at the outlet side of the first working fluid storage tank, one end of the first working fluid delivery pipeline body is connected to the second diversion outlet, and the other end is connected to the eight-way valve; a second working fluid storage and delivery pipeline, wherein the second working fluid storage and delivery pipeline comprises a second working fluid delivery pipeline body and a second working fluid storage tank, a second inlet control valve and a second outlet control valve arranged thereon, wherein the second working fluid storage tank is used to store a second liquid cooling working fluid, wherein the second liquid cooling working fluid and the first liquid cooling working fluid are different cooling working fluids, the second inlet control valve is located at the inlet side of the second working fluid storage tank, the second outlet control valve is located at the outlet side of the second working fluid storage tank, one end of the second working fluid delivery pipeline body is connected to the third diversion outlet, and the other end is connected to the eight-way valve; A multi-channel heat exchanger, the multi-channel heat exchanger comprising a hot fluid circulation pipeline, an outer sleeve structure and an inner sleeve structure, the inner sleeve structure is arranged inside the outer sleeve structure, the reserved space between the inner sleeve structure and the inner sleeve structure constitutes a flash chamber, the inner sleeve structure has a flow boiling chamber, the flash chamber and the flow boiling chamber are both directly connected to the external environment, and the hot fluid circulation pipeline is wound around the inner sleeve structure; A flash evaporation pipeline, wherein the flash evaporation pipeline comprises a flash evaporation pipeline body and a flash evaporation nozzle, one end of the flash evaporation pipeline body is connected to the flash evaporation chamber through the flash evaporation nozzle, and the other end is connected to the eight-way valve; A flow boiling pipeline, one end of which passes through the outer sleeve structure and is connected to the flow boiling cavity of the inner sleeve structure, and the other end of which is connected to the eight-way valve; An additional auxiliary cooling unit, the additional auxiliary cooling unit comprising an additional auxiliary cooling pipeline inlet section and an additional auxiliary cooling pipeline outlet section, one end of the additional auxiliary cooling pipeline inlet section is connected to the external auxiliary liquid cooling medium, and the other end is connected to the eight-way valve, and the additional auxiliary cooling pipeline outlet section is connected to the flow boiling cavity; The interface positions of the first passage, the second passage, the third passage and the fourth passage are adjusted by rotating the eight-way valve, and the blow-off pipeline body, the first working fluid delivery pipeline body and the second working fluid delivery pipeline body are connected to the flash pipeline body, the flow boiling pipeline and the inlet section of the additional auxiliary cooling pipeline respectively, and the pressure reducing valve, the blow-off pipeline control valve, the first inlet control valve, the first outlet control valve, the second inlet control valve and the second outlet control valve are cooperated to switch to the first liquid cooling working fluid flash cooling mode, the first liquid cooling working fluid boiling cooling mode, the second liquid cooling working fluid flash cooling mode, the second liquid cooling working fluid boiling cooling mode, the flash chamber blow-off mode, the flow boiling chamber blow-off mode or the auxiliary liquid cooling working fluid convection heat exchange cooling mode respectively, and the hot fluid in the hot fluid circulation pipeline is cooled by the flash cooling mode, the boiling cooling mode or the convection heat exchange cooling mode.

2. The thermal control system according to claim 1, characterized in that: The thermal control system also includes a temperature sensor and a controller. The temperature sensor is arranged at the inlet and outlet of the thermal fluid circulation pipeline, and is used to monitor the pre-cooling temperature and the post-cooling temperature of the thermal fluid flowing into and out of the thermal fluid circulation pipeline. The controller is connected to the temperature sensor and the pressure reducing valve respectively, and is used to control the opening of the pressure reducing valve according to the pre-cooling temperature and the post-cooling temperature to adjust the saturated pressure and temperature of the first liquid cooling medium and the second liquid cooling medium.

3. The thermal control system according to claim 1, characterized in that: The outer wall surfaces of the first working fluid storage tank and the second working fluid storage tank are both paved with automatic temperature-regulating heating films, and the saturated pressure and temperature of the first liquid cooling working fluid and the second liquid cooling working fluid are adjusted by the heating films.

4. The thermal control system according to claim 1, characterized in that: A gas-liquid separation device is provided inside the first working fluid storage tank and the second working fluid storage tank. The gas-liquid separation device is used to separate the pressurized gas from the first liquid cooling working fluid or the second liquid cooling working fluid, and squeeze out the first liquid cooling working fluid or the second liquid cooling working fluid under the push of the pressurized gas.

5. The thermal control system according to claim 4, characterized in that: The gas-liquid separation device is an elastic bag or a mechanically compressible component.

6. The thermal control system according to claim 1, characterized in that: The inner sleeve structure comprises a plurality of circular or square pipes arranged in parallel, and the inner cavity of the circular or square pipes serves as a flow boiling chamber.

7. The thermal control system according to claim 6, characterized in that: The spacing between the circular or square pipes is 20 to 50 mm, and the equivalent diameter is 5 to 20 mm.

8. The thermal control system according to claim 1, characterized in that: The equivalent diameter of the hot fluid circulation pipeline is 5 to 20 mm.

9. The thermal control system according to any one of claims 1 to 8, characterized in that: The first liquid cooling medium, the second liquid cooling medium and the external auxiliary liquid cooling medium are all selected from one of water, liquid nitrogen, liquid ammonia or R134a.

10. An aircraft, characterized in that: The aircraft includes the multi-medium alternating cooperative thermal control system according to any one of claims 1 to 9.

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