Aircraft heat exchanger gas pressure accumulation pulse turbulence cleaning device and method

Abstract

The invention relates to the technical field of aircraft heat exchanger cleaning, and particularly discloses a gas pressure accumulation pulse turbulence cleaning device and method for an aircraft heat exchanger. The aircraft heat exchanger gas pressure accumulation pulse turbulence cleaning device comprises a liquid return box, a pump, a liquid suction pipe, a liquid storage tank, a liquid conveying pipe, a liquid return pipe, a quick-opening electric ball valve and a gas pressurization mechanism. The liquid suction pipe is connected with the liquid return box and the upper end of the liquid storage tank. And the pump is arranged on the pipette. The inlet end of the liquid conveying pipe communicates with the bottom end of the liquid storage tank, and the outlet end is connected with a fin channel inlet of the aircraft heat exchanger. The inlet end of the liquid return pipe is connected with a fin channel outlet of the aircraft heat exchanger, and the outlet end is guided to the liquid return box. And the quick-opening electric ball valve is arranged on the liquid return pipe. During cleaning, the cleaning liquid is firstly extracted to fill the fin channel, the gas pressurization mechanism is communicated with the top end of the liquid storage tank to pressurize the liquid storage tank to target pressure, then the quick-opening electric ball valve is opened to form pulse excitation turbulence, dirt in the fin channel is rapidly washed away, and the method is high in cleaning cleanliness and short in consumed time.

Description

Technical Field

[0001] The present application relates to the technical field of aircraft heat exchanger cleaning, and in particular to a gas pressure-accumulated pulse turbulence cleaning device and method for an aircraft heat exchanger. Background Art

[0002] The aircraft heat exchanger has a shell with a fin channel and a fluid channel in the shell, and a plurality of fins for heat dissipation are installed in the fin channel. After the aircraft heat exchanger is used for a long time, a lot of dust and other pollutants will accumulate on the fins, which will reduce the heat dissipation efficiency of the fins, so the fins need to be cleaned. One method of cleaning the fins is to directly rinse the fins with cleaning liquid or water, but due to the front and back blocking of the multiple fins in the shell, it is difficult for the cleaning liquid or water to directly rinse the internal fins, and the cleaning is not thorough. Another method of cleaning the fins is to soak the aircraft heat exchanger with cleaning liquid for several hours to remove dust and other pollutants on the fins and the inner wall of the channel, but this method takes too long. Summary of the invention

[0003] In view of the fact that the fins cannot be cleaned thoroughly by directly flushing with cleaning liquid or water, and that soaking the aircraft heat exchanger with cleaning liquid for several hours takes too long, the present application proposes an improved solution for cleaning the fin channels of the aircraft heat exchanger, which is as follows.

[0004] In a first aspect, the present application proposes a gas pressure-accumulated pulse turbulence cleaning device for an aircraft heat exchanger, and adopts the following technical solution.

[0005] A gas pressure-accumulating pulse turbulent cleaning device for an aircraft heat exchanger comprises a liquid return tank, a pump, a liquid suction pipe, a liquid storage tank, a liquid infusion pipe, a liquid return pipe, a quick-opening electric ball valve and a gas pressurizing mechanism.

[0006] The inlet end of the liquid suction pipe is located in the liquid return tank, and the outlet end is connected to the upper end of the liquid storage tank. The pump is installed on the liquid suction pipe. The inlet end of the liquid infusion pipe is connected to the bottom end of the liquid storage tank, and the outlet end is used to connect to the fin channel inlet of the aircraft heat exchanger.

[0007] The inlet end of the liquid return pipe is used to connect to the outlet of the fin channel of the aircraft heat exchanger, and the outlet end leads to the liquid return tank. The quick-opening electric ball valve is installed on the liquid return pipe.

[0008] The gas pressurizing mechanism is connected to the top end of the liquid storage tank.

[0009] By adopting the above technical scheme, the return liquid tank, pump, suction pipe, liquid storage tank, infusion pipe and return liquid pipe are connected to form a cleaning liquid circulation circuit, the quick-opening electric ball valve can control the flow of cleaning liquid in the cleaning liquid circuit, and the gas booster mechanism can pressurize the liquid storage tank to the target pressure, and they can cooperate with each other to generate pressurized cleaning liquid in the circuit. When the quick-opening electric ball valve is opened, pulse-excited turbulence is formed, and the impact force formed quickly flushes the dirt in the fin channel, cleans it thoroughly, and takes a short time. Compared with the scheme of directly flushing the fins with cleaning liquid or water or soaking the aircraft heat exchanger with cleaning liquid for several hours, this scheme has achieved obvious improvement effect.

[0010] A preferred solution of the aircraft heat exchanger gas pressure accumulation pulse turbulence cleaning device is that the liquid suction pipe is equipped with a one-way valve allowing fluid to pass to the liquid storage tank. The liquid infusion pipe is equipped with a one-way valve allowing fluid to pass to the outlet end of the liquid infusion pipe.

[0011] By adopting the above technical solution, the fluid pumped up by the pump only flows to the liquid storage tank and does not flow back to the liquid return tank. The fluid only flows out of the liquid storage tank into the infusion tube and does not flow in the opposite direction, eliminating the negative pressure that may exist inside the liquid storage tank and attracting the fluid to flow back.

[0012] A preferred solution of the aircraft heat exchanger gas pressure accumulation pulse turbulence cleaning device is that the aircraft heat exchanger gas pressure accumulation pulse turbulence cleaning device also includes a heating mechanism and a temperature sensor. The heating mechanism is configured to heat the cleaning liquid in the return liquid tank. The temperature sensor is configured to sense the temperature of the cleaning liquid in the return liquid tank.

[0013] By adopting the above technical solution, the device can heat the cleaning liquid to a suitable temperature and improve the efficiency of cleaning the radiator.

[0014] A preferred solution of the gas pressure-accumulating pulse turbulent cleaning device for the aircraft heat exchanger is that the gas pressurizing mechanism includes an air compressor, an air pressure pipe, an air storage tank, an air delivery pipe and an absolute pressure regulator. The air pressure pipe connects the air compressor and the air storage tank. A one-way valve is installed on the air pressure pipe to allow fluid to pass to the air storage tank. The two ends of the air delivery pipe are respectively connected to the top of the air storage tank and the top of the liquid storage tank. The absolute pressure regulator is installed on the air delivery pipe to control the air pressure inside the liquid storage tank.

[0015] By adopting the above technical solution, the air compressor injects compressed air into the air storage tank through the air pressure pipe, and the air storage tank inputs air to the liquid storage tank through the air supply pipe. Under the control of the absolute pressure regulator, the air pressure in the liquid storage tank reaches the set value. Under this air pressure, in conjunction with the pressure accumulation and release operation of the quick-opening electric ball valve, the cleaning liquid forms turbulence in the radiator, thereby improving the cleaning effect of the fins.

[0016] A preferred solution of the aircraft heat exchanger gas pressure storage pulse turbulence cleaning device is that the aircraft heat exchanger gas pressure storage pulse turbulence cleaning device further includes a safety valve. The safety valve is installed on the gas storage tank.

[0017] By adopting the above technical solution, the pressure of the gas storage tank is released through the safety valve when the gas storage tank is over-pressurized.

[0018] A preferred solution of the aircraft heat exchanger gas pressure accumulation pulse turbulence cleaning device is that the end of the gas delivery pipe connected to the liquid storage tank is higher than the end of the liquid suction pipe connected to the liquid storage tank.

[0019] By adopting the above technical solution, the air supply pipe is above the liquid level of the liquid storage tank injected by the liquid suction pipe, and the gas input by the air supply pipe can pressurize the cleaning liquid to form pulse excitation turbulence by accumulating pressure and releasing it.

[0020] In the second aspect, the present application proposes a gas pressure-accumulated pulse turbulent cleaning method for an aircraft heat exchanger, and adopts the following technical solution.

[0021] A method for cleaning an aircraft heat exchanger by gas pressure accumulation pulse turbulence is implemented based on the above-mentioned aircraft heat exchanger gas pressure accumulation pulse turbulence cleaning device. The method for cleaning an aircraft heat exchanger by gas pressure accumulation pulse turbulence includes the following steps.

[0022] Assembly steps: connecting the outlet end of the liquid infusion tube to the inlet of the fin channel of the aircraft heat exchanger, and connecting the inlet end of the liquid return tube to the outlet of the fin channel of the aircraft heat exchanger.

[0023] Filling step: close the quick-opening electric ball valve, start the pump to inject the cleaning liquid in the return liquid tank into the liquid storage tank and fill the fin channel of the aircraft heat exchanger, and close the pump.

[0024] Accumulated pulse turbulent cleaning step: start the gas booster mechanism, wait until the internal pressure of the liquid storage tank reaches 0.3±0.1MPa, and open the quick-opening electric ball valve. The cleaning liquid forms a pulse excitation turbulence in the heat exchanger fin channel, and the cleaning liquid quickly impacts the fin channel for 20~40s.

[0025] Repeat the pressure-accumulating pulse turbulent cleaning step 5 to 10 times.

[0026] By adopting the above technical solution, liquid is filled to wet the dirt and the surface of the fins, etc., and the pressure is increased to .3±0.1MPa before opening the quick-opening electric ball valve. The impact force generated quickly flushes the dirt, and the cleaning is repeated 5 to 10 times to achieve an efficient cleaning effect.

[0027] A preferred embodiment of the gas pressure-accumulated pulse turbulent cleaning method for an aircraft heat exchanger is that, in the pressure-accumulated pulse turbulent cleaning step, the flow rate of the cleaning liquid in the heat exchanger fin channel is 25 m / s to 50 m / s.

[0028] By adopting the above technical solution, the cleaning liquid with an appropriate flow rate of 25m / s to 50m / s can efficiently wash away the dust and dirt on the surface of the fins. If the flow rate is too slow, the impact force of washing away the dust is reduced, and the cleanliness is reduced. If the flow rate is too fast, the flow resistance is significantly increased, and the cleaning efficiency is also reduced.

[0029] A preferred solution of the gas pressure-accumulated pulse turbulent cleaning method for an aircraft heat exchanger is that, before the step of injecting the cleaning liquid, the cleaning liquid in the liquid return tank is heated to 55° C. to 60° C.

[0030] By adopting the above technical solution, the cleaning liquid at this temperature has a good cleaning effect on the dirt on the fins and channels.

[0031] A method for cleaning an aircraft heat exchanger with gas pressure-accumulated pulse turbulence is implemented based on an aircraft heat exchanger gas pressure-accumulated pulse turbulence cleaning device in which the gas boosting mechanism includes an air compressor, an air pressure pipe, an air storage tank, an air transmission pipe, and an absolute pressure regulator. The method for cleaning an aircraft heat exchanger with gas pressure-accumulated pulse turbulence includes: The absolute pressure regulator automatically adjusts the internal air pressure of the liquid storage tank to 0.3±0.1MPa. When the internal air pressure of the liquid storage tank is lower than 0.2MPa, the liquid storage tank is pressurized to 0.3~0.4MPa. When the internal air pressure of the liquid storage tank is higher than 0.4MPa, the liquid storage tank is depressurized to 0.3~0.4MPa. When the internal air pressure of the liquid storage tank is 0.3±0.1MPa, the liquid storage tank is not pressurized or depressurized.

[0032] By adopting the above technical solution, the internal air pressure of the liquid storage tank has a certain interval adjustment range, and the internal air pressure of the liquid storage tank can be adjusted within the target range.

[0033] In summary, the gas pressure-accumulated pulse turbulent cleaning device and method for aircraft heat exchangers of the present application have the following beneficial effects: using cleaning fluid as the working medium, under the action of high-pressure air, through the control of the fast-opening electric ball valve, pulse excitation turbulence is formed in the heat exchanger fin channel, and dust or pollution in the heat exchanger channel is quickly impacted. The gas pressure-accumulated pulse turbulent cleaning method has a fast cleaning speed, high cleanliness, and little destructive power to the fin surface coating or other protective layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The present invention is a schematic diagram of connecting an aircraft heat exchanger gas pressure-accumulating pulse turbulence cleaning device to an aircraft heat exchanger.

[0035] Figure 2 Comparison pictures of the aircraft heat exchanger before and after cleaning using the gas pressure accumulation pulse turbulent cleaning method.

[0036] Figure numerals: 1. liquid return tank; 2. pump; 3. liquid suction pipe; 4. liquid storage tank; 5. liquid infusion pipe; 6. liquid return pipe; 7. quick-opening electric ball valve; 8. heating mechanism; 9. temperature sensor; 10. one-way valve; 11. air compressor; 12. air compressor pipe; 13. air storage tank; 14. air transmission pipe; 15. absolute pressure regulator; 16. safety valve. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the following embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] like Figure 1 A gas pressure-accumulating pulse turbulent cleaning device for an aircraft heat exchanger comprises a liquid return tank 1, a pump 2, a liquid suction pipe 3, a liquid storage tank 4, a liquid infusion pipe 5, a liquid return pipe 6, a quick-opening electric ball valve 7 and a gas boosting mechanism.

[0039] The return liquid tank 1 is loaded with cleaning liquid. A heating mechanism 8 and a temperature sensor 9 may also be installed in the return liquid tank 1. The heating mechanism 8 may be a heating wire to heat the cleaning liquid. The temperature sensor 9 senses the temperature of the cleaning liquid so that the system adjusts the power of the heating mechanism 8 to adjust the temperature of the cleaning liquid to a target temperature, which is preferably 55°C to 60°C.

[0040] The pump 2 may be a submersible pump 2 , which is arranged in the cleaning liquid in the return tank 1 .

[0041] The inlet end of the suction pipe 3 is inserted into the cleaning liquid, and the outlet end is connected to the upper end of the liquid storage tank 4. The pump 2 is installed on the suction pipe 3 and immersed in the cleaning liquid, and is used to extract the cleaning liquid from the upper end of the liquid storage tank 4 and inject it into the liquid storage tank 4. A one-way valve 10 is installed on the pipe section of the suction pipe 3 above the liquid surface to prevent the liquid storage tank 4 from flowing back to the liquid return tank 1 under the pressure of the gas booster mechanism.

[0042] The inlet end of the liquid infusion pipe 5 is connected to the bottom of the liquid storage tank, and the outlet end is used to connect the fin channel inlet of the aircraft heat exchanger. A one-way valve 10 is installed on the liquid infusion pipe 5 to prevent the cleaning fluid from flowing back into the liquid storage tank.

[0043] The inlet end of the liquid return pipe 6 is used to connect the outlet of the fin channel of the aircraft heat exchanger. The outlet end of the liquid return pipe 6 leads to the liquid return tank 1. The quick-opening electric ball valve 7 is installed on the liquid return pipe 6.

[0044] The return liquid tank 1, the pump 2, the suction pipe 3, the liquid storage tank 4, the infusion pipe 5 and the return liquid pipe 6, as well as the aircraft heat exchanger to be connected to the infusion pipe 5 and the return liquid pipe 6 are connected together to form a cleaning liquid circulation loop, and the quick-opening electric ball valve 7 can control the flow of the cleaning liquid in the cleaning liquid loop.

[0045] This device adopts the method of reflux of cleaning liquid instead of discarding the cleaning liquid after one use. This is because the cleaning liquid is used to flush the fins and the inner wall of the channel inside the radiator. The focus is on flushing, so the cleaning liquid is allowed to be slightly dirty. The dirt flushed will basically not stay in the fin channel, but will flow out of the heat exchanger with the cleaning liquid. Reflux improves the utilization rate of the cleaning liquid, reduces loss, and reduces costs. Before the pump 2, that is, at the inlet end of the suction pipe 3, a filter can be installed to filter impurities in the reflux cleaning liquid.

[0046] The gas boosting mechanism includes an air compressor 11, an air pressure pipe 12, an air storage tank 13, an air delivery pipe 14 and an absolute pressure regulator 15. The air compressor 11 is connected to one end of the air pressure pipe 12, and the other end of the air pressure pipe 12 is connected to the air storage tank 13, so that the air compressor 11 can inhale air and inject compressed air into the air storage tank 13. One end of the air delivery pipe 14 is connected to the top of the air storage tank 13, and the other end is connected to the top of the liquid storage tank 4. The absolute pressure regulator 15 is installed on the air delivery pipe 14 to control the air pressure of the liquid storage tank 4. If the air pressure is higher than the set pressure, the air is released through the absolute pressure regulator 15. If the air pressure is lower than the set pressure, the compressed air continues to be introduced into the liquid storage tank 4 through the absolute pressure regulator 15, so that the air pressure on the liquid surface inside the liquid storage tank 4 reaches the set value, and the set value can be 0.3±0.1Mpa.

[0047] A one-way valve 10 is installed on the air pressure pipe 12 to allow fluid to pass to the air tank 13, preventing the compressed air in the air tank 13 from flowing back to the air compressor 11. A safety valve 16 is installed on the air tank 13 to release air in the event of overpressure to prevent the air tank 13 from bursting.

[0048] Since the suction pipe 3 is used to input cleaning liquid into the liquid storage tank 4, and the air pipe 14 is used to input compressed air into the liquid storage tank 4, and in the liquid storage tank 4, the air layer is located above the cleaning liquid, the present application sets the end of the air pipe 14 connected to the liquid storage tank 4 to be higher than the end of the suction pipe 3 connected to the liquid storage tank 4. On the one hand, it prevents the cleaning liquid from flowing into the air pipe 14. On the other hand, the compressed air input into the liquid storage tank 4 by the air pipe 14 can directly pressurize the cleaning liquid, increase the impact force on the radiator fins when the cleaning liquid is released, and improve the cleaning cleanliness.

[0049] Since the liquid suction tube 3 is connected to the upper end of the liquid storage tank 4 and the liquid delivery tube 5 is connected to the bottom end of the liquid storage tank, under the gravity of the cleaning liquid and the pressurization of the cleaning liquid by the air input from the air delivery pipe 14, when the quick-opening electric ball valve 7 is opened, the cleaning liquid forms a pulse-excited turbulence in the heat exchanger fin channel, quickly impacting the dust pollution on the fins and the inner wall of the channel, so that the dust and the like quickly separate from the fins and the inner wall of the channel.

[0050] The present application discloses a method for cleaning an aircraft heat exchanger by gas pressure-accumulating pulse turbulence, using the above-mentioned cleaning device as equipment to clean the aircraft heat exchanger. The cleaning method includes an assembly step, a liquid filling step, and a pressure-accumulating pulse turbulence cleaning step. The following is a detailed implementation process of each step.

[0051] Assembly step: In this step, the aircraft heat exchanger to be cleaned is installed in the device, including connecting the outlet end of the liquid infusion tube 5 to the inlet of the fin channel of the aircraft heat exchanger, and connecting the inlet end of the liquid return tube 6 to the outlet of the fin channel of the aircraft heat exchanger. The other parts of the device are pre-connected.

[0052] Filling steps: close the quick-opening electric ball valve 7, start the heating mechanism 8 to heat the cleaning liquid in the return tank 1, the temperature sensor 9 senses the temperature of the cleaning liquid, and adjusts the temperature of the cleaning liquid to 55℃~60℃ by adjusting the power of the heating mechanism 8. Start the pump 2 to inject the cleaning liquid in the return tank 1 into the liquid storage tank and fill the fin channel of the aircraft heat exchanger, and close the pump 2.

[0053] The steps of pressurized pulse turbulence cleaning are as follows: start the air compressor 11 and the absolute pressure regulator 15, adjust the internal air pressure of the liquid storage tank 4 to 0.3±0.1MPa, energize the quick-opening electric ball valve 7, so that the quick-opening electric ball valve 7 reaches the full open position in about 0.7 seconds, and the cleaning liquid forms a pulse excitation turbulence in the heat exchanger fin channel. The flow rate of the cleaning liquid in the heat exchanger fin channel is 25m / s~50m / s, and the cleaning liquid quickly flushes the dirt in the fin channel, and each time lasts 20~40s.

[0054] Repeat the pressurized pulse turbulent cleaning steps 5 to 10 times to clean the dust and other dirt in the fin channel.

[0055] The above process of repeated pressure-accumulating pulse turbulent cleaning steps is to maintain the internal air pressure of the liquid storage tank 4 at 0.3±0.1MPa: when the internal air pressure of the liquid storage tank 4 is lower than 0.2MPa, the air compressor 11 and the absolute pressure regulator 15 are started to continuously inject compressed air into the liquid storage tank 4 to increase the internal air pressure of the liquid storage tank 4 to 0.3~0.4MPa; when the internal air pressure of the liquid storage tank 4 is higher than 0.4MPa, the air is discharged through the absolute pressure regulator 15 to reduce the internal pressure of the liquid storage tank 4 to 0.3~0.4MPa; when the internal air pressure of the liquid storage tank 4 is 0.3±0.1MPa, the liquid storage tank 4 is not pressurized or depressurized.

[0056] The pictures before and after the aircraft heat exchanger was cleaned by the above gas pressure pulse turbulence cleaning method are as follows Figure 2 There was a lot of dirt on the fins and inner tube walls of the aircraft heat exchanger before cleaning. After cleaning, the fins and inner tube walls were very clean, and the cleanliness of ultrasonic cleaning was high, indicating that this method can effectively remove dirt from the aircraft heat exchanger.

[0057] The aircraft heat exchanger gas pressure-accumulating pulse turbulence cleaning device and method of the present application uses cleaning fluid as the working medium. Under the action of high-pressure air, by controlling the closing and opening of the quick-opening electric ball valve 7, a pulse-excited turbulence is formed in the heat exchanger fin channel, and dust and other pollutants in the heat exchanger channel are quickly impacted, thereby achieving the purpose of efficiently removing dirt. The cleaning speed of this method is fast, the cleaning time is about 1 / 3 of the ultrasonic cleaning time, and the cleanliness is high. The impact force formed by this method is tangential to the flow channel surface, the normal force is small, and the destructive force on the fin surface coating is small.

[0058] Although the present application has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A gas pressure accumulation pulse turbulence cleaning device for aircraft heat exchangers, characterized in that: It comprises a liquid return tank (1), a pump (2), a liquid suction pipe (3), a liquid storage tank (4), a liquid infusion pipe (5), a liquid return pipe (6), a quick-opening electric ball valve (7) and a gas pressurizing mechanism; The inlet end of the liquid suction pipe (3) is located in the liquid return tank (1), and the outlet end is connected to the upper end of the liquid storage tank (4); the pump (2) is installed on the liquid suction pipe (3); the inlet end of the liquid infusion pipe (5) is connected to the bottom end of the liquid storage tank (4), and the outlet end is used to connect to the fin channel inlet of the aircraft heat exchanger; The inlet end of the liquid return pipe (6) is used to connect to the outlet of the fin channel of the aircraft heat exchanger, and the outlet end leads to the liquid return tank (1); the quick-opening electric ball valve (7) is installed on the liquid return pipe (6); The gas pressurizing mechanism is connected to the top end of the liquid storage tank (4).

2. The aircraft heat exchanger gas pressure accumulation pulse turbulence cleaning device according to claim 1, characterized in that: The liquid suction tube (3) is provided with a one-way valve (10) for allowing fluid to pass to the liquid storage tank (4); the liquid infusion tube (5) is provided with a one-way valve (10) for allowing fluid to pass to the outlet end of the liquid infusion tube (5).

3. The aircraft heat exchanger gas pressure accumulation pulse turbulence cleaning device according to claim 1, characterized in that: The aircraft heat exchanger gas pressure-accumulating pulse turbulent cleaning device further comprises a heating mechanism (8) and a temperature sensor (9); the heating mechanism (8) is configured to heat the cleaning liquid in the liquid return tank (1); and the temperature sensor (9) is configured to sense the temperature of the cleaning liquid in the liquid return tank (1).

4. The aircraft heat exchanger gas pressure accumulation pulse turbulence cleaning device according to claim 1, characterized in that: The gas pressurizing mechanism comprises an air compressor (11), an air pressure pipe (12), an air storage tank (13), an air delivery pipe (14) and an absolute pressure regulator (15); the air pressure pipe (12) connects the air compressor (11) and the air storage tank (13); a one-way valve (10) is installed on the air pressure pipe (12) for allowing fluid to pass into the air storage tank (13); two ends of the air delivery pipe (14) are respectively connected to the top ends of the air storage tank (13) and the liquid storage tank (4); the absolute pressure regulator (15) is installed on the air delivery pipe (14) and is used to control the air pressure inside the liquid storage tank (4).

5. The aircraft heat exchanger gas pressure accumulation pulse turbulence cleaning device according to claim 4, characterized in that: The aircraft heat exchanger gas pressure-accumulating pulse turbulence cleaning device further comprises a safety valve (16); the safety valve (16) is mounted on the gas storage tank (13).

6. The aircraft heat exchanger gas pressure accumulation pulse turbulence cleaning device according to claim 4, characterized in that: The end of the gas delivery pipe (14) connected to the liquid storage tank (4) is higher than the end of the liquid suction pipe (3) connected to the liquid storage tank (4).

7. A gas pressure accumulation pulse turbulence cleaning method for aircraft heat exchangers, characterized in that: The device is implemented based on the gas pressure accumulation pulse turbulence cleaning device for aircraft heat exchangers according to any one of claims 1 to 6; The gas pressure accumulation pulse turbulence cleaning method for an aircraft heat exchanger comprises: Assembly steps: connecting the outlet end of the liquid infusion tube (5) to the inlet of the fin channel of the aircraft heat exchanger, and connecting the inlet end of the liquid return tube (6) to the outlet of the fin channel of the aircraft heat exchanger; Filling step: closing the quick-opening electric ball valve (7), starting the pump (2) to inject the cleaning liquid in the return liquid tank (1) into the liquid storage tank and fill the fin channel of the aircraft heat exchanger, and closing the pump (2); Pressure-accumulated pulse turbulent cleaning step: starting the gas booster mechanism, and when the internal gas pressure of the liquid storage tank (4) reaches 0.3±0.1 MPa, opening the quick-opening electric ball valve (7); the cleaning liquid forms a pulse-excited turbulent flow in the heat exchanger fin channel, and the cleaning liquid quickly impacts the fin channel for 20 to 40 seconds; Repeat the pressure-accumulating pulse turbulent cleaning step 5 to 10 times.

8. The method for cleaning an aircraft heat exchanger by gas pressure accumulation pulse turbulence according to claim 7, characterized in that: In the pressure-accumulating pulse turbulent cleaning step, the flow rate of the cleaning liquid in the heat exchanger fin channel is 25m / s~50m / s.

9. The method for cleaning an aircraft heat exchanger by gas pressure accumulation pulse turbulence according to claim 7, characterized in that: Before the step of pouring the cleaning liquid, the cleaning liquid in the liquid return tank (1) is heated to 55°C to 60°C.

10. A gas pressure accumulation pulse turbulence cleaning method for aircraft heat exchangers, characterized in that: The device is implemented based on the gas pressure accumulation pulse turbulence cleaning device for the aircraft heat exchanger according to claim 5 or 6; The gas pressure accumulation pulse turbulence cleaning method for an aircraft heat exchanger comprises: The absolute pressure regulator (15) automatically adjusts the internal air pressure of the liquid storage tank (4) to 0.3±0.1 MPa; When the internal air pressure of the liquid storage tank (4) is lower than 0.2 MPa, the liquid storage tank (4) is pressurized to 0.3-0.4 MPa; when the internal air pressure of the liquid storage tank (4) is higher than 0.4 MPa, the liquid storage tank (4) is depressurized to 0.3-0.4 MPa; when the internal air pressure of the liquid storage tank (4) is 0.3±0.1 MPa, the liquid storage tank (4) is neither pressurized nor depressurized.

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