A cooling system

Abstract

The application belongs to the technical field of aircraft design, and particularly relates to a cooling system. The cooling system comprises a consumable cooling working medium container (20) connected with a first coil pipe (23) and a second coil pipe (12) through pipelines respectively, the first coil pipe (23) is located in an oil tank (1), the second coil pipe (12) is located in a liquid storage tank (13), the liquid storage tank (13) is connected with a cooling circuit, fuel in the oil tank (1) is transported to an engine (4) through a fuel supply pipeline, and a part of the cooling circuit and a part of the fuel supply pipeline stagger to form a fuel-liquid heat exchanger (9). The application provides additional refrigerating capacity for the cooling system through the combination of the consumable cooling working medium and the increased coil pipe in the liquid storage tank, and effectively improves the utilization rate of the consumable cooling working medium.

Description

Technical Field

[0001] This application belongs to the field of aircraft design technology, and specifically relates to a cooling system. Background Technology

[0002] The existing cooling system mainly uses fuel as a heat sink. When the overall heat load of the aircraft increases, the insufficient capacity of the fuel heat sink will not be able to meet the heat dissipation requirements of the entire aircraft, thus affecting the execution of flight missions.

[0003] The existing cooling system will reduce its cooling efficiency when the fuel temperature rises, causing the equipment's operating temperature to gradually increase and affecting its performance.

[0004] The cooling effect of existing cooling systems is affected by fuel temperature. When the fuel temperature is too high, it will not be able to provide heat dissipation for the airborne equipment, thus limiting the use of the equipment. Summary of the Invention

[0005] To address the aforementioned problems, this application provides a cooling system capable of multiple cooling processes for fuel, thereby resolving issues such as insufficient fuel heat sink capacity or inability to dissipate heat for airborne equipment due to excessively high fuel temperature.

[0006] The cooling system provided in this application mainly includes:

[0007] A consumable coolant container is connected to a first coil and a second coil via pipes. The first coil is located in a fuel tank, and the second coil is located in a liquid storage tank. The liquid storage tank is connected to a cooling circuit. Fuel in the fuel tank is supplied to the engine via a fuel supply line. A portion of the cooling circuit and a portion of the fuel supply line intersect to form a fuel-liquid heat exchanger.

[0008] Preferably, the consumable cooling medium container includes a nitrogen cylinder.

[0009] Preferably, the nitrogen cylinder contains liquid nitrogen.

[0010] Preferably, the nitrogen cylinder outlet is equipped with a pressure reducing valve.

[0011] Preferably, the consumable cooling medium container is connected to a first coil and a second coil via two sets of pipelines respectively. A first container and a first solenoid valve are provided between the consumable cooling medium container and the first coil, and a second container and a second solenoid valve are provided between the consumable cooling medium container and the second coil. Correspondingly, the rear end of the first coil is connected to a first gas discharge outlet via a first electric pressure regulating valve and a first one-way valve, and the rear end of the second coil is connected to a second gas discharge outlet via a second electric pressure regulating valve and a second one-way valve.

[0012] Preferably, a heat insulation layer is provided on the pipeline between the consumable cooling medium container and the first coil, and a heat insulation layer is provided on the pipeline between the consumable cooling medium container and the second coil.

[0013] Preferably, the first coil and / or the second coil are provided with fins on their outer surface.

[0014] Preferably, the piping of the first coil and / or the second coil extends in an S-shape.

[0015] Preferably, a second flow control valve is provided at the inlet or outlet end of the fuel-liquid heat exchanger on the cooling circuit, and the cooling circuit also includes a control pipeline connected in parallel to the fuel-liquid heat exchanger and the second flow control valve, and a third flow control valve is provided on the control pipeline.

[0016] Preferably, the oil supply line is provided with a fuel-hydraulic oil heat exchanger and a fuel-lubricating oil heat exchanger. The fuel-hydraulic oil heat exchanger includes a fuel supply line for fuel flow and a hydraulic oil line for hydraulic oil flow. The fuel-lubricating oil heat exchanger includes a fuel supply line for fuel flow and a lubricating oil line for lubricating oil flow.

[0017] This application provides additional cooling capacity to the cooling system by combining the consumable coolant with a coil inside the liquid storage tank, effectively improving the utilization rate of the consumable coolant. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the cross-linking of the cooling system piping in this application.

[0019] Figure 2 This is a controlled schematic diagram of the cooling system of this application.

[0020] Among them, 1-fuel tank, 2-fuel pump, 3-first flow control valve, 4-engine, 5-fuel-hydraulic oil heat exchanger, 6-fuel-lubricating oil heat exchanger, 7-second flow control valve, 8-third flow control valve, 9-fuel-liquid heat exchanger, 10-equipment cold plate, 11-pump assembly, 12-second coil, 13-liquid reservoir, 14-second electric pressure regulating valve, 15-second one-way valve, 16-second gas exhaust outlet, 17-the... 18-Second container, 19-Pressure reducing valve, 20-Consumable coolant container, 21-First container, 22-First solenoid valve, 23-First coil, 24-First electric pressure regulating valve, 25-First one-way valve, 26-First gas discharge outlet, 27, 28, 30, 31, 33, 34, 35, 37, 39, 40, 41-Temperature sensor, 29, 32, 36, 38-Flow sensor, 42-Controller. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0022] This application provides a cooling system, such as Figure 1 As shown, it mainly includes:

[0023] A consumable coolant container 20 is connected to a first coil 23 and a second coil 12 via pipes. The first coil 23 is located in the fuel tank 1, and the second coil 12 is located in the liquid storage tank 13. The liquid storage tank 13 is connected to a cooling circuit. The fuel in the fuel tank 1 is supplied to the engine 4 via a fuel supply line. A portion of the cooling circuit and a portion of the fuel supply line intersect to form a fuel-liquid heat exchanger 9.

[0024] This application uses a first coil 23 to cool the fuel in the fuel tank 1. Furthermore, the fuel is cooled by a fuel-liquid heat exchanger 9. The liquid in the fuel-liquid heat exchanger 9 is stored in a liquid storage tank 13. A second coil 12 is installed inside the liquid storage tank 13. When the temperature of the cooling medium in the liquid storage tank 13 exceeds the allowable temperature range, the consumable cooling medium in the consumable cooling medium container is introduced into the second coil 12 to cool the liquid cooling medium in the liquid storage tank 13.

[0025] In a narrow sense, the fuel tank 1 in this application refers to an aircraft fuel tank; in a broader sense, it includes, but is not limited to, hydraulic oil tanks or lubricating oil tanks on aircraft. That is, the above design method can be used to improve the design of other aircraft cooling systems, such as improving the hydraulic oil tank or lubricating oil tank in the same way. Through this cooling design method, the flow rate of the consumable coolant entering the first coil 23 and the second coil 12 can be controlled according to the actual heat generation of the equipment, thus fully utilizing the cooling capacity of the consumable coolant.

[0026] In some alternative embodiments, the consumable cooling medium container 20 includes a nitrogen cylinder. It is understood that the nitrogen cylinder is merely illustrative and does not constitute a limitation on the type of working medium or the container used; liquid nitrogen or other working media may be used.

[0027] In some alternative embodiments, the nitrogen cylinder contains liquid nitrogen. It is understood that the properties of the working fluid in the nitrogen cylinder of this application can be set arbitrarily; for example, the working fluid can be liquid, gaseous, or a gas / liquid mixture.

[0028] In some alternative embodiments, the nitrogen cylinder outlet is provided with a pressure reducing valve 19. In this embodiment, the pressure reducing valve 19 is only illustrative and does not constitute a limitation on the present invention. For example, the nitrogen cylinder in this application can also be a container with an integrated self-pressurization function, and thus the pressure reducing valve 19 is not necessary.

[0029] In some optional embodiments, the consumable cooling medium container 20 is connected to the first coil 23 and the second coil 12 through two sets of pipelines respectively. A first container 21 and a first solenoid valve 22 are provided between the consumable cooling medium container 20 and the first coil 23. A second container 18 and a second solenoid valve 17 are provided between the consumable cooling medium container 20 and the second coil 12. Correspondingly, the rear end of the first coil 23 is connected to the first gas discharge outlet 26 through a first electric pressure regulating valve 24 and a first one-way valve 25. The rear end of the second coil 12 is connected to the second gas discharge outlet 16 through a second electric pressure regulating valve 14 and a second one-way valve 15.

[0030] In this embodiment, the first coil 23 and the second coil 12 can be installed separately or in series. When installed separately, they are each connected to the consumable cooling medium container 20 through a set of pipes. In this case, two containers are needed to hold the consumable cooling medium entering the first coil 23 and the second coil 12, such as the first container 21 and the second container 18. When installed in series, the first container 21 and the second container 18 can be combined into one container according to actual needs. Correspondingly, the first solenoid valve 22 and the second solenoid valve 17 do not constitute a limitation of this application. One solenoid valve can be used instead, or two or more solenoid valves can be used depending on the actual needs. For example, if two or more solenoid valves are used, they can be connected after the same liquid nitrogen container or after different liquid nitrogen containers, and the design can be matched according to actual needs. The corresponding cooling system can share one or use multiple sets of one-way valves and gas discharge outlets according to actual needs.

[0031] In some alternative embodiments, a heat insulation layer is provided on the pipeline between the consumable cooling medium container 20 and the first coil 23, and a heat insulation layer is provided on the pipeline between the consumable cooling medium container 20 and the second coil 12.

[0032] In this embodiment, the two pipes are generally covered with a heat insulation layer on the outside. However, depending on actual needs, a heat insulation layer may not be used, or a heat insulation layer may be used on some pipe sections.

[0033] In some alternative embodiments, fins are provided on the outside of the first coil 23 and / or the second coil 12.

[0034] In this embodiment, the coils in the liquid storage tank 13 or the oil tank 1 are only illustrative examples and do not constitute a limitation on the invention. The outer sides of the two coils can be plain tubes or have external fins or other structural forms.

[0035] In some alternative embodiments, the conduits of the first coil 23 and / or the second coil 12 extend in an S-shape.

[0036] In this embodiment, the overall shape of the coil can be customized according to requirements, such as being S-shaped or ring-shaped.

[0037] It should also be noted that the second coil 12 in the liquid reservoir 13 and the first coil 23 in the oil tank 1 are merely illustrative examples and do not constitute a limitation of this application. If multiple coils exist in the same or different liquid reservoirs, the coils in the cooling system can be designed in series, in parallel, or a combination of both. For example, the coils in the liquid reservoir 13 or the oil tank 1 in this application can be a single pipe or multiple pipes connected in parallel.

[0038] In some alternative embodiments, a second flow control valve 7 is provided at the inlet or outlet end of the fuel-liquid heat exchanger 9 on the cooling circuit. The cooling circuit also includes a control pipeline connected in parallel to both ends of the fuel-liquid heat exchanger 9 and the second flow control valve 7, and a third flow control valve 8 is provided on the control pipeline.

[0039] In this embodiment, the liquid in the cooling circuit starts from the storage tank 13, passes through the pump assembly 11 and the equipment cold plate 10, and is divided into two paths. One path enters the fuel-liquid heat exchanger 9 after passing through the second flow control valve 7, and then flows back to the storage tank 13. The other path flows back to the storage tank 13 after passing through the third flow control valve 8.

[0040] The above methods allow for flexible switching of heat sinks depending on the operating conditions. For example, the coil design can be used to cool the oil tank, and a consumable coolant combined with a coil design can also be used to cool the oil tank.

[0041] In some alternative embodiments, the fuel-hydraulic oil heat exchanger 5 and the fuel-lubricating oil heat exchanger 6 are provided on the fuel supply line. The fuel-hydraulic oil heat exchanger 5 includes a fuel supply line for fuel flow and a hydraulic oil line for hydraulic oil flow. The fuel-lubricating oil heat exchanger 6 includes a fuel supply line for fuel flow and a lubricating oil line for lubricating oil flow.

[0042] In this embodiment, the components such as the fuel-hydraulic oil heat exchanger 5 and the fuel-lubricating oil heat exchanger 6 are only illustrative examples and do not constitute a limitation on the system architecture.

[0043] refer to Figure 2 This is a schematic diagram of the application of the cooling system of this application. The cooling system implemented according to this application is controlled by the controller 42 through the first flow control valve 3, the second flow control valve 7, the third flow control valve 8, the second electric pressure regulating valve 14, the second solenoid valve 17, the pressure reducing valve 19, the first solenoid valve 22, and the first electric pressure regulating valve 24 to coordinate and control the flow distribution on each heat dissipation pipe.

[0044] When the temperature sensors 35, 37, or 39 arranged on the cooling circuit exceed the limit temperature, the controller 42 can control the opening degree of the pressure reducing valve 19 and the first solenoid valve 22 based on the real-time measurement data of the temperature sensors 27, 28, 30, 37, 40 and the flow sensor 29 to ensure that the temperature of the fuel in the fuel tank 1 and each branch does not exceed the usage limit.

[0045] When temperature sensors 34, 37, 39, or 40 exceed the limit temperature, controller 42 controls the opening of the second flow control valve 7, the third flow control valve 8, the second solenoid valve 17, and the pressure reducing valve 19 based on the real-time measurement data of temperature sensors 31, 33, 34, 35, 37, 39, 40, 41 and flow sensors 32, 36, 38, to ensure that the temperature of the working fluid in the storage tank 13 and on each branch does not exceed the usage limit.

[0046] The controller 42 can further control the opening of the first flow control valve 3 based on the real-time fuel flow and inlet temperature requirements of the engine 4.

[0047] The design in this application is merely illustrative and does not constitute a limitation on the application. For example, this application may include at least three application forms: the first form eliminates the branch where the second coil 12 is located, relying solely on the heat dissipation branch where the first coil 23 is located and the oil supply line where the first flow control valve 3 is located to complete the temperature control of each heat dissipation branch of the system; the second form eliminates the branch where the first coil 23 is located, relying solely on the heat dissipation branch where the second coil 12 is located and the oil supply line where the first flow control valve 3 is located to complete the temperature control of each heat dissipation branch of the system; the third form is... Figure 2 The scheme shown can be used to coordinate the control of each branch according to usage requirements.

[0048] This application has the following advantages:

[0049] (1) Improved performance. The cooling system design has improved the overall heat dissipation capacity of the aircraft and enhanced the temperature control capability of the onboard equipment. It can quickly respond to various heat dissipation needs of the system and has advanced performance.

[0050] (2) Low compensation loss. Low energy consumption, relatively few additional finished products and accessories, and the coil is installed inside the liquid storage tank / oil tank, resulting in low cost, volume and weight.

[0051] (3) High versatility. The cooling system design scheme provided in this application has diverse variations and flexible control strategies, making it suitable for various airborne operating conditions and highly versatile.

[0052] (4) Easy to implement. The cooling system provided in this application has fewer components and the design scheme is flexible and versatile. The system scheme can be integrated according to specific needs and is easy to implement.

[0053] (5) High reliability. The system control strategy is flexible and can switch between various cooling modes in real time. The control principle is highly implementable and reliable.

[0054] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A cooling system, characterized by, The application relates to a fuel cooling system, which comprises a consumable cooling medium container (20) connected with a first coil pipe (23) and a second coil pipe (12) through two pipelines respectively, the first coil pipe (23) is located in an oil tank (1), the second coil pipe (12) is located in a liquid storage tank (13), the liquid storage tank (13) is connected with a cooling circuit, and the fuel in the oil tank (1) is sent to an engine (4) through a fuel supply pipeline; and a part of the cooling circuit and a part of the fuel supply pipeline are staggered to form a fuel-liquid heat exchanger (9). The consumable cooling medium container (20) is connected with the first coil pipe (23) and the second coil pipe (12) through two pipelines respectively, a first container (21) and a first electromagnetic valve (22) are arranged between the consumable cooling medium container (20) and the first coil pipe (23), a second container (18) and a second electromagnetic valve (17) are arranged between the consumable cooling medium container (20) and the second coil pipe (12), correspondingly, the rear end of the first coil pipe (23) is connected with a first gas discharge outlet (26) through a first electric pressure regulating valve (24) and a first one-way valve (25), and the rear end of the second coil pipe (12) is connected with a second gas discharge outlet (16) through a second electric pressure regulating valve (14) and a second one-way valve (15). A second flow control valve (7) is arranged at the inlet end or the outlet end of the fuel-liquid heat exchanger (9) on the cooling circuit, the cooling circuit further comprises a control pipeline connected in parallel between the fuel-liquid heat exchanger (9) and the second flow control valve (7), and a third flow control valve (8) is arranged on the control pipeline.

2. The cooling system of claim 1, wherein, The consumable cooling medium container (20) comprises a nitrogen cylinder.

3. The cooling system of claim 2, wherein, Liquid nitrogen is arranged in the nitrogen cylinder.

4. The cooling system of claim 2, wherein, A pressure reducing valve (19) is arranged at the outlet of the nitrogen cylinder.

5. The cooling system of claim 1, wherein, Heat insulation layers are arranged on the pipelines between the consumable cooling medium container (20) and the first coil pipe (23) and between the consumable cooling medium container (20) and the second coil pipe (12).

6. The cooling system of claim 1, wherein, Fins are arranged outside the first coil pipe (23) and / or the second coil pipe (12).

7. The cooling system of claim 1, wherein, The pipelines of the first coil pipe (23) and / or the second coil pipe (12) are extended in an S shape.

8. The cooling system of claim 1, wherein, A fuel-hydraulic oil heat exchanger (5) and a fuel-oil heat exchanger (6) are arranged on the fuel supply pipeline, the fuel-hydraulic oil heat exchanger (5) comprises a fuel supply pipeline for fuel flow and a hydraulic oil pipeline for hydraulic oil flow, and the fuel-oil heat exchanger (6) comprises a fuel supply pipeline for fuel flow and an oil pipeline for oil flow.

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