A multi-cold-source series-parallel fluid system controllable heat dissipation structure and method

Abstract

This invention belongs to the field of aviation and relates to a controllable heat dissipation structure and method for a multi-cold-source series-parallel fluid system. The heat dissipation method and path can be selected according to the timing and temperature, increasing heat dissipation efficiency. The method includes: during the subsonic flight phases of takeoff, cruise, and return, using external cold air as a backup cold source, and employing a skin radiator to dissipate heat from the lubricating oil, hydraulic oil, and fuel; when entering the supersonic flight phase, the skin radiator is shut off, and fuel is used to dissipate heat from the lubricating oil and hydraulic oil. This invention employs a combination of fuel cooling and skin radiator cooling, comprehensively controlling the heat dissipation methods and paths of the hydraulic and lubricating oil fluid systems according to different flight phases and temperature conditions, providing a cold source for the aircraft's thermal load and maximizing the efficiency of the aircraft's heat dissipation capacity.

Description

Technical Field

[0001] This invention belongs to the field of aviation and relates to a controllable heat dissipation structure and method for a multi-cold-source series-parallel fluid system. Background Technology

[0002] As aircraft performance improves, the thermal load on aircraft increases, and the heat dissipation capacity tends to saturate. Current aircraft typically use methods such as introducing ram air through surface openings to increase onboard heat dissipation, which is not conducive to reducing aerodynamic drag. Current hydraulic and lubricating oil systems typically use fuel-hydraulic oil coolers and fuel-lubricating oil coolers to dissipate hydraulic and lubricating oil heat, respectively. This results in low utilization of onboard heat dissipation capacity and causes fuel temperature to exceed the limit under high thermal load, which has an adverse effect on the engine.

[0003] The patent application with publication number CN208258272U uses a skin radiator to cool the aircraft. Although this method increases the aircraft's heat dissipation capacity, the high temperature of the skin during supersonic flight actually raises the oil temperature. Summary of the Invention

[0004] The purpose of this invention is to provide a controllable heat dissipation structure and method for a multi-cold-source series-parallel fluid system, which can select the heat dissipation method and path according to the timing and temperature, thereby increasing heat dissipation efficiency.

[0005] The technical solution of this invention:

[0006] A controllable heat dissipation structure for a multi-cold-source series-parallel fluid system includes:

[0007] Hydraulic cooling structure, lubricating oil cooling structure, fuel cooling structure;

[0008] The hydraulic cooling structure is equipped with a hydraulic oil cooling branch and a hydraulic oil internal circulation branch. Both branches are connected to the fuel cooling structure through a heat exchange device.

[0009] The lubricating oil cooling structure is equipped with a lubricating oil cooling branch and a lubricating oil internal circulation branch. Both branches are connected to the fuel cooling structure through a heat exchange device.

[0010] The fuel cooling structure is equipped with a fuel cooling branch and a fuel internal circulation branch. Both branches are connected to the hydraulic cooling structure and the lubricating oil cooling structure through heat exchange devices.

[0011] During subsonic flight, the hydraulic cooling structure closes the internal circulation branch of the hydraulic oil and cools the hydraulic oil through the hydraulic oil cooling branch; the lubricating oil cooling structure closes the internal circulation branch of the lubricating oil and cools the lubricating oil through the lubricating oil cooling branch; and the fuel cooling structure closes the fuel cooling branch and cools the fuel through the fuel cooling branch.

[0012] During supersonic flight, the hydraulic cooling structure closes the hydraulic oil cooling branch and opens the hydraulic oil internal circulation branch; the lubricating oil cooling structure closes the lubricating oil cooling branch and opens the lubricating oil internal circulation branch; the fuel cooling structure closes the fuel cooling branch and opens the fuel internal circulation branch; and the fuel cooling structure cools the hydraulic oil in the hydraulic cooling structure and the lubricating oil in the lubricating oil cooling structure through a heat exchange device.

[0013] The hydraulic cooling structure uses a hydraulic oil cooling branch, the lubricating oil cooling structure uses a lubricating oil cooling branch, and the fuel cooling structure uses a fuel internal circulation branch. When the temperature of the hydraulic oil and lubricating oil is lower than the temperature of the fuel, the hydraulic cooling structure and the lubricating oil cooling structure cool the fuel in the fuel cooling structure through a heat exchange device.

[0014] The fuel cooling structure connects to other heat loads to cool them down.

[0015] The hydraulic cooling structure includes: a fuel / hydraulic oil cooler 1, a hydraulic oil skin cooler 3, and a hydraulic control valve 5;

[0016] The inlet of hydraulic control valve 5 is connected to the hydraulic return oil, one outlet of hydraulic control valve 5 is connected to the inlet of hydraulic oil skin radiator 3, the outlet of hydraulic oil skin radiator 3 is connected to the hydraulic oil circuit inlet of fuel / hydraulic oil radiator 1, the hydraulic oil circuit outlet of fuel / hydraulic oil radiator 1 is connected to the hydraulic oil tank, and the other outlet of hydraulic control valve 5 is directly connected to the hydraulic oil circuit inlet of fuel / hydraulic oil radiator 1.

[0017] The lubricating oil cooling structure includes: fuel / lubricating oil cooler 2, lubricating oil skin cooler 4, and lubricating oil control valve 6;

[0018] The inlet of the lubricating oil control valve 6 is connected to the lubricating oil outlet. One outlet of the lubricating oil control valve 6 is connected to the inlet of the lubricating oil skin radiator 4. The outlet of the lubricating oil skin radiator 4 is connected to the lubricating oil circuit inlet of the fuel / lubricating oil radiator 2. The lubricating oil circuit outlet of the fuel / lubricating oil radiator 2 is connected to the lubricating oil tank. The other outlet of the lubricating oil control valve 6 is directly connected to the lubricating oil circuit inlet of the fuel / lubricating oil radiator 2.

[0019] The fuel cooling structure includes: fuel control valve 7, fuel skin radiator 8, and fuel temperature control valve 9;

[0020] Fuel control valve 7 has its inlet connected to the fuel outlet, one outlet connected to the inlet of fuel skin radiator 8, the outlet of fuel skin radiator 8 connected to the fuel tank inlet, one outlet of the fuel tank connected to the inlet of fuel temperature control valve 9, and the outlet of fuel temperature control valve 9 connected to the fuel supply tank inlet; the other outlet of the fuel tank is connected to the fuel inlet of fuel / hydraulic oil radiator 1, the fuel outlet of fuel / hydraulic oil radiator 1 is connected to the fuel inlet of fuel / lubricating oil radiator 2, and the fuel outlet of fuel / lubricating oil radiator 2 is connected to the fuel supply tank inlet; the fuel supply tank outlet is connected to the engine.

[0021] Other heat loads are connected in series between the fuel outlet of fuel / hydraulic oil cooler 1 and the fuel inlet of fuel / lubricating oil cooler 2.

[0022] A fuel temperature control valve is installed between other heat loads and the fuel outlet of the fuel / hydraulic oil radiator 1. The one-way input end of the fuel temperature control valve is connected to the fuel outlet of the fuel / hydraulic oil radiator 1, the one-way output end of the fuel temperature control valve is connected to other heat loads, and the two-way input and output ends of the fuel temperature control valve are connected to the cold storage oil tank.

[0023] A fuel temperature control valve is installed between other heat loads and the fuel inlet of the fuel / oil radiator 2. One one-way input end of the fuel temperature control valve is connected to other heat loads, the one-way output end of the fuel temperature control valve is connected to the fuel inlet of the fuel / oil radiator 2, and the other one-way input end of the fuel temperature control valve is connected to the cold storage tank.

[0024] A fuel temperature control valve is installed between the fuel outlet of the fuel / oil radiator 2 and the fuel supply tank. The one-way input end of the fuel temperature control valve is connected to the fuel outlet of the fuel / oil radiator 2, the one-way output end of the fuel temperature control valve is connected to the fuel supply tank, and the two-way input and output ends of the fuel temperature control valve are connected to the cold storage tank.

[0025] A controllable heat dissipation method for a multi-cold-source series-parallel fluid system includes:

[0026] During the subsonic flight phases of takeoff, cruise, and return, the outside air is used as a backup cooling source, and the skin radiator is used to cool the lubricating oil, hydraulic oil, and fuel. When entering the supersonic flight phase, the skin radiator is turned off, and the fuel is used to cool the lubricating oil and hydraulic oil.

[0027] When using a hydraulic oil / lubricating oil skin radiator, if the temperature of the hydraulic oil / lubricating oil is lower than the temperature of the fuel, the hydraulic oil / lubricating oil is used to cool the fuel and store the fuel.

[0028] The beneficial effects of this invention are:

[0029] This invention employs a combination of fuel cooling and skin radiator cooling. It comprehensively controls the heat dissipation methods and pathways of hydraulic and lubricating fluid systems by using different cold sources depending on the flight phase and temperature conditions. During subsonic flight phases such as takeoff, cruise, and return, the skin radiator facilitates air-oil heat exchange between the hydraulic and lubricating oils without adding bleed air vents, and can conversely store heat for the fuel. During supersonic flight, the skin radiator is shut off, and onboard fuel cooling is used. Simultaneously, for the fuel cooling system, a combination of series and parallel connections is used to provide a cold source for the onboard thermal load, maximizing the efficiency of the onboard cooling capacity. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the hydraulic oil and lubricating oil cooling system of the present invention.

[0031] Figure 2 This is a schematic diagram of the fuel thermal management cycle of the present invention. Detailed Implementation

[0032] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] The overall concept of this invention is as follows:

[0034] During the subsonic flight phases of takeoff, cruise, and return, external cold air is used as a backup cooling source. Skin radiators are employed to cool the lubricating oil, hydraulic oil, and fuel. The oil transfers heat to the skin via cold plates, and then the skin directs the heat to the high-speed external cold airflow, thereby reducing the temperature of the fluid system and increasing internal heat dissipation capacity. Furthermore, upon entering the supersonic flight phase, the skin radiators are shut off, and the fuel is used to cool the lubricating oil and hydraulic oil. Further still, when using the hydraulic oil and lubricating oil skin radiators, if the hydraulic oil and lubricating oil temperatures are lower than the fuel temperatures, they can conversely cool the fuel, storing fuel coolant to facilitate cooling other onboard thermal loads. Finally, the engine inlet fuel temperature is regulated based on the heat load outlet fuel temperature using a series piping system.

[0035] When aggregated, the present invention provides a controllable heat dissipation structure for a multi-cold-source series-parallel fluid system, comprising:

[0036] Hydraulic cooling structure, lubricating oil cooling structure, fuel cooling structure;

[0037] The hydraulic cooling structure is equipped with a hydraulic oil cooling branch and a hydraulic oil internal circulation branch. Both branches are connected to the fuel cooling structure through a heat exchange device.

[0038] The lubricating oil cooling structure is equipped with a lubricating oil cooling branch and a lubricating oil internal circulation branch. Both branches are connected to the fuel cooling structure through a heat exchange device.

[0039] The fuel cooling structure is equipped with a fuel cooling branch and a fuel internal circulation branch. Both branches are connected to the hydraulic cooling structure and the lubricating oil cooling structure through heat exchange devices.

[0040] During subsonic flight, the hydraulic cooling structure closes the internal circulation branch of the hydraulic oil and cools the hydraulic oil through the hydraulic oil cooling branch; the lubricating oil cooling structure closes the internal circulation branch of the lubricating oil and cools the lubricating oil through the lubricating oil cooling branch; and the fuel cooling structure closes the fuel cooling branch and cools the fuel through the fuel cooling branch.

[0041] During supersonic flight, the hydraulic cooling structure closes the hydraulic oil cooling branch and opens the hydraulic oil internal circulation branch; the lubricating oil cooling structure closes the lubricating oil cooling branch and opens the lubricating oil internal circulation branch; the fuel cooling structure closes the fuel cooling branch and opens the fuel internal circulation branch; and the fuel cooling structure cools the hydraulic oil in the hydraulic cooling structure and the lubricating oil in the lubricating oil cooling structure through a heat exchange device.

[0042] The hydraulic cooling structure uses a hydraulic oil cooling branch, the lubricating oil cooling structure uses a lubricating oil cooling branch, and the fuel cooling structure uses a fuel internal circulation branch. When the temperature of the hydraulic oil and lubricating oil is lower than the temperature of the fuel, the hydraulic cooling structure and the lubricating oil cooling structure cool the fuel in the fuel cooling structure through a heat exchange device.

[0043] The fuel cooling structure connects to other heat loads to cool them down.

[0044] For the engineering implementation of the above structure, please refer to [link / reference]. Figure 1 , Figure 2 . Figure 1 This is a schematic diagram of a hydraulic oil / lubricating oil cooling system for infrared stealth, including fuel / hydraulic oil radiator 1, fuel / lubricating oil radiator 2, hydraulic oil skin radiator 3, lubricating oil skin radiator 4, hydraulic control valve 5, lubricating oil control valve 6, hydraulic oil tank, and lubricating oil tank. Figure 2 This is a diagram of the fuel thermal management system architecture, including fuel control valve 7, fuel skin radiator 8, fuel temperature control valves 9-10, and fuel temperature control valve N+8. Fuel / hydraulic oil radiator 1 includes a hydraulic oil chamber and a fuel chamber, where hydraulic oil and fuel exchange heat through fins, etc.; fuel / lubricating oil radiator 2 includes a lubricating oil chamber and a fuel chamber, where lubricating oil and fuel exchange heat through fins, etc.

[0045] 1. In hydraulic oil and lubricating oil cooling systems

[0046] The hydraulic cooling structure includes: a fuel / hydraulic oil cooler 1, a hydraulic oil skin cooler 3, and a hydraulic control valve 5;

[0047] The inlet of hydraulic control valve 5 is connected to the hydraulic return oil, one outlet of hydraulic control valve 5 is connected to the inlet of hydraulic oil skin radiator 3, the outlet of hydraulic oil skin radiator 3 is connected to the hydraulic oil circuit inlet of fuel / hydraulic oil radiator 1, the hydraulic oil circuit outlet of fuel / hydraulic oil radiator 1 is connected to the hydraulic oil tank, and the other outlet of hydraulic control valve 5 is directly connected to the hydraulic oil circuit inlet of fuel / hydraulic oil radiator 1.

[0048] The lubricating oil cooling structure includes: fuel / lubricating oil cooler 2, lubricating oil skin cooler 4, and lubricating oil control valve 6;

[0049] The inlet of the lubricating oil control valve 6 is connected to the lubricating oil outlet. One outlet of the lubricating oil control valve 6 is connected to the inlet of the lubricating oil skin radiator 4. The outlet of the lubricating oil skin radiator 4 is connected to the lubricating oil circuit inlet of the fuel / lubricating oil radiator 2. The lubricating oil circuit outlet of the fuel / lubricating oil radiator 2 is connected to the lubricating oil tank. The other outlet of the lubricating oil control valve 6 is directly connected to the lubricating oil circuit inlet of the fuel / lubricating oil radiator 2.

[0050] When heat dissipation is required by the skin, the P and T ends of hydraulic control valve 4 and lubricating oil control valve 5 are connected, while the A end is closed. Hydraulic oil and lubricating oil flow through hydraulic oil skin radiator 3 and lubricating oil skin radiator 4, utilizing the external airflow to carry away the heat from the hydraulic oil and lubricating oil. Due to the influence of the skin radiator's location, area, airflow velocity, and ambient temperature, if the hydraulic oil or lubricating oil temperature after passing through the skin radiator is higher than the fuel inlet temperature of the radiator's fuel chamber, the fuel continues to dissipate heat for the hydraulic oil or lubricating oil through the fuel chamber of hydraulic / fuel radiator 1 or lubricating oil / fuel radiator 2. If the hydraulic oil or lubricating oil temperature after passing through the skin radiator is lower than the inlet fuel temperature of the fuel / hydraulic oil radiator or the fuel / lubricating oil radiator's fuel chamber, the hydraulic oil and lubricating oil respectively dissipate heat and store cold for the fuel through the hydraulic oil chamber of hydraulic / fuel radiator 1 and the lubricating oil chamber of lubricating oil / fuel radiator 2, providing a heat sink for the fuel to dissipate heat for other heat loads.

[0051] When it is necessary to reduce infrared radiation and maintain the low temperature of the machine surface, the P and A ends of the hydraulic control valve 4 and the closing control valve 5 are connected, and the T end is closed. Fuel cools the hydraulic oil and lubricating oil through the fuel / hydraulic oil cooler 1 and the fuel / lubricating oil cooler 2.

[0052] 2. See Figure 2 In the fuel oil thermal management system:

[0053] The fuel cooling structure includes: fuel control valve 7, fuel skin radiator 8, and fuel temperature control valve 9;

[0054] Fuel control valve 7 has its inlet connected to the fuel outlet, one outlet connected to the inlet of fuel skin radiator 8, the outlet of fuel skin radiator 8 connected to the fuel tank inlet, one outlet of the fuel tank connected to the inlet of fuel temperature control valve 9, and the outlet of fuel temperature control valve 9 connected to the fuel supply tank inlet; the other outlet of the fuel tank is connected to the fuel inlet of fuel / hydraulic oil radiator 1, the fuel outlet of fuel / hydraulic oil radiator 1 is connected to the fuel inlet of fuel / lubricating oil radiator 2, and the fuel outlet of fuel / lubricating oil radiator 2 is connected to the fuel supply tank inlet; the fuel supply tank outlet is connected to the engine.

[0055] Other heat loads are connected in series between the fuel outlet of fuel / hydraulic oil cooler 1 and the fuel inlet of fuel / lubricating oil cooler 2.

[0056] A fuel temperature control valve is installed between other heat loads and the fuel outlet of the fuel / hydraulic oil radiator 1. The one-way input end of the fuel temperature control valve is connected to the fuel outlet of the fuel / hydraulic oil radiator 1, the one-way output end of the fuel temperature control valve is connected to other heat loads, and the two-way input and output ends of the fuel temperature control valve are connected to the cold storage oil tank.

[0057] A fuel temperature control valve is installed between other heat loads and the fuel inlet of the fuel / oil radiator 2. One one-way input end of the fuel temperature control valve is connected to other heat loads, the one-way output end of the fuel temperature control valve is connected to the fuel inlet of the fuel / oil radiator 2, and the other one-way input end of the fuel temperature control valve is connected to the cold storage tank.

[0058] A fuel temperature control valve is installed between the fuel outlet of the fuel / oil radiator 2 and the fuel supply tank. The one-way input end of the fuel temperature control valve is connected to the fuel outlet of the fuel / oil radiator 2, the one-way output end of the fuel temperature control valve is connected to the fuel supply tank, and the two-way input and output ends of the fuel temperature control valve are connected to the cold storage tank.

[0059] (1) When the skin needs to dissipate heat, open the fuel control valve 7 and use the outside air to dissipate heat from the oil; when it is necessary to reduce infrared radiation and keep the engine surface low temperature, close the fuel control valve 7.

[0060] (2) After the fuel comes out of the fuel tank, (a) if the outlet temperature of the fuel / hydraulic oil radiator and the fuel / lubricating oil radiator is higher than the fuel tank temperature, the fuel will provide a cold source to the heat loads such as the fuel / hydraulic oil radiator through branch 1. If the fuel outlet temperature of each heat load does not exceed the inlet threshold of the next heat load, the temperature control valves 10, 11, ..., N+7, N+8 will be closed to ensure that the fuel heat sink is fully and efficiently utilized. If the oil temperature at the outlet of the fuel / hydraulic oil radiator exceeds the inlet threshold of other heat loads, the fuel temperature control valve 8 will be opened, and the oil in the cold storage tank will directly replenish the downstream heat load with cold oil through branch 2. And so on. When the fuel outlet temperature of the last heat load exceeds the inlet temperature threshold of the fuel tank, the cold storage tank will replenish the engine inlet with cold oil through branch N. (b) If the fuel outlet temperature of the fuel / hydraulic oil cooler or the fuel / lubricating oil cooler is lower than the fuel tank temperature, the fuel in the cold storage tank will be cooled via the corresponding branch 2 and branch N-1. If the amount of fuel returning to the fuel supply tank from the main branch is insufficient, the fuel control valve 9 will be opened to replenish the fuel supply tank.

[0061] The above description is merely a specific embodiment of the present invention, providing a detailed description of the invention. Parts not covered herein are conventional techniques. However, the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A controllable heat dissipation structure for a multi-cold-source series-parallel fluid system, characterized in that, include: Hydraulic cooling structure, lubricating oil cooling structure, fuel cooling structure; The hydraulic cooling structure is equipped with a hydraulic oil cooling branch and a hydraulic oil internal circulation branch. Both branches are connected to the fuel cooling structure through a heat exchange device. The lubricating oil cooling structure is equipped with a lubricating oil cooling branch and a lubricating oil internal circulation branch. Both branches are connected to the fuel cooling structure through a heat exchange device. The fuel cooling structure is equipped with a fuel cooling branch and a fuel internal circulation branch. Both branches are connected to the hydraulic cooling structure and the lubricating oil cooling structure through heat exchange devices. During subsonic flight, the hydraulic cooling structure closes the internal circulation branch of the hydraulic oil and cools the hydraulic oil through the hydraulic oil cooling branch; the lubricating oil cooling structure closes the internal circulation branch of the lubricating oil and cools the lubricating oil through the lubricating oil cooling branch; and the fuel cooling structure closes the internal circulation branch of the fuel and cools the fuel through the fuel cooling branch. During the supersonic flight phase, the hydraulic cooling structure closes the hydraulic oil cooling branch and opens the hydraulic oil internal circulation branch; the lubricating oil cooling structure closes the lubricating oil cooling branch and opens the lubricating oil internal circulation branch; the fuel cooling structure closes the fuel cooling branch and opens the fuel internal circulation branch; and the fuel cooling structure cools the hydraulic oil in the hydraulic cooling structure and the lubricating oil in the lubricating oil cooling structure through a heat exchange device. The hydraulic cooling structure includes: a fuel / hydraulic oil radiator [1]; the lubricating oil cooling structure includes: a fuel / lubricating oil radiator [2]; other heat loads are connected in series between the fuel outlet of the fuel / hydraulic oil radiator [1] and the fuel inlet of the fuel / lubricating oil radiator [2]; A fuel temperature control valve is provided between other heat loads and the fuel outlet of the fuel / hydraulic oil radiator [1]. The one-way input end of the fuel temperature control valve is connected to the fuel outlet of the fuel / hydraulic oil radiator [1]. The one-way output end of the fuel temperature control valve is connected to other heat loads. The two-way input and output ends of the fuel temperature control valve are connected to the cold storage tank. A fuel temperature control valve is provided between other heat loads and the fuel inlet of the fuel / oil radiator [2]. One one-way input end of the fuel temperature control valve is connected to other heat loads, the one-way output end of the fuel temperature control valve is connected to the fuel inlet of the fuel / oil radiator [2], and the other one-way input end of the fuel temperature control valve is connected to the cold storage tank. A fuel temperature control valve is provided between the fuel outlet of the fuel / oil radiator [2] and the fuel supply tank. The one-way input end of the fuel temperature control valve is connected to the fuel outlet of the fuel / oil radiator [2]. The one-way output end of the fuel temperature control valve is connected to the fuel supply tank. The two-way input and output ends of the fuel temperature control valve are connected to the cold storage tank.

2. The controllable heat dissipation structure for a multi-cold source series-parallel fluid system as described in claim 1, characterized in that, The hydraulic cooling structure uses a hydraulic oil cooling branch, the lubricating oil cooling structure uses a lubricating oil cooling branch, and the fuel cooling structure uses a fuel internal circulation branch. When the temperature of the hydraulic oil and lubricating oil is lower than the temperature of the fuel, the hydraulic cooling structure and the lubricating oil cooling structure cool the fuel in the fuel cooling structure through a heat exchange device.

3. A multi-cold-source series-parallel fluid system controllable heat dissipation structure according to claim 2, characterized in that, The fuel cooling structure connects to other heat loads to cool them down.

4. The controllable heat dissipation structure for a multi-cold source series-parallel fluid system as described in claim 1, characterized in that, The hydraulic cooling structure includes: a fuel / hydraulic oil radiator[1], a hydraulic oil skin radiator[3], and a hydraulic control valve[5]. The inlet of the hydraulic control valve [5] is connected to the hydraulic return oil, one outlet of the hydraulic control valve [5] is connected to the inlet of the hydraulic oil skin radiator [3], the outlet of the hydraulic oil skin radiator [3] is connected to the hydraulic oil circuit inlet of the fuel / hydraulic oil radiator [1], the hydraulic oil circuit outlet of the fuel / hydraulic oil radiator [1] is connected to the hydraulic oil tank, and the other outlet of the hydraulic control valve [5] is directly connected to the hydraulic oil circuit inlet of the fuel / hydraulic oil radiator [1].

5. The controllable heat dissipation structure for a multi-cold source series-parallel fluid system as described in claim 1, characterized in that, The lubricating oil cooling structure includes: fuel / lubricating oil cooler[2], lubricating oil skin cooler[4], and lubricating oil control valve[6]; The inlet of the lubricating oil control valve [6] is connected to the lubricating oil outlet. One outlet of the lubricating oil control valve [6] is connected to the inlet of the lubricating oil skin radiator [4]. The outlet of the lubricating oil skin radiator [4] is connected to the lubricating oil circuit inlet of the fuel / lubricating oil radiator [2]. The lubricating oil circuit outlet of the fuel / lubricating oil radiator [2] is connected to the lubricating oil tank. The other outlet of the lubricating oil control valve [6] is directly connected to the lubricating oil circuit inlet of the fuel / lubricating oil radiator [2].

6. The controllable heat dissipation structure for a multi-cold source series-parallel fluid system as described in claim 1, characterized in that, The fuel cooling structure includes: a fuel control valve[7], a fuel skin radiator[8], and a fuel temperature control valve[9]. The inlet of the fuel control valve [7] is connected to the fuel outlet, one outlet of the fuel control valve [7] is connected to the inlet of the fuel skin radiator [8], the outlet of the fuel skin radiator [8] is connected to the fuel tank inlet, one outlet of the fuel tank is connected to the inlet of the fuel temperature control valve [9], and the outlet of the fuel temperature control valve [9] is connected to the fuel supply tank inlet; the other outlet of the fuel tank is connected to the fuel inlet of the fuel / hydraulic oil radiator [1], the fuel outlet of the fuel / hydraulic oil radiator [1] is connected to the fuel inlet of the fuel / lubricating oil radiator [2], and the fuel outlet of the fuel / lubricating oil radiator [2] is connected to the fuel supply tank inlet; the fuel supply tank outlet is connected to the engine.

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