An automatic pressure regulating and heat recovery silencer exhaust device for aircraft environmental control system laboratory

Abstract

This utility model discloses an automatic pressure-regulating, heat-recovery, silencer exhaust device for aircraft environmental control system laboratories, relating to the field of aircraft environmental control system technology. The utility model includes an exhaust pipe, an insulation layer, a sound insulation layer, an electric pressure regulator for the pipe, a silencer for the pipe, a main pipe pressure sensor, a branch pipe pressure sensor for the test equipment, a lithium bromide heat recovery system, an automatic control fan, an outdoor silencer tower, an automatic controller, and a branch pipe soundproof cover. It achieves waste heat recovery from high-temperature, high-pressure gases, improves the energy utilization efficiency of the laboratory, reduces the environmental impact of exhaust, and comprehensively improves the energy-saving and environmental protection level of aircraft environmental control laboratories. It has advantages such as efficient indoor and outdoor noise reduction, centralized system control, stable and reliable exhaust pressure, real-time monitoring, independent controllability, automatic adjustment, waste heat recovery, energy saving and emission reduction, and green environmental protection.

Description

Technical Field

[0001] This utility model belongs to the technical field of aircraft environmental control systems, specifically relating to an automatic pressure regulating and heat recovery silencing exhaust device for an aircraft environmental control system laboratory. Background Technology

[0002] The aircraft environmental control system (hereinafter referred to as the aircraft environmental control system) is a complete set of devices that ensures the appropriate environmental conditions required for the normal operation of personnel and equipment in the aircraft cabin and equipment compartment. It mainly meets the requirements of cooling, pressurization, ventilation, etc. for certain parts of the aircraft. The environmental control system of modern aircraft mainly controls the pressure and temperature of the cabin and equipment compartment, and mainly includes pressurized cabin, cabin air supply and distribution, cabin pressure control, temperature control, and humidity control.

[0003] There are two main ways to supply pressurized air to an aircraft's environmental control system. One is to use pressurized air drawn from the engine compressor outlet as the air supply source. Its advantages are simplicity and reliability, and it has been widely used. The other is to draw in air from the surrounding atmosphere, pressurize it, and then supply it.

[0004] Therefore, most aircraft environmental control system tests require simulating the high-temperature and high-pressure air source of engine bleed air to supply the environmental control test bench. Currently, most domestic aircraft environmental control test laboratories achieve this by heating high-pressure air with an electric furnace. However, the emission of high-temperature and high-pressure test gas after this part of the test is an unavoidable problem. The design of the exhaust system is an indispensable part of the aircraft environmental control system test laboratory.

[0005] The common problems with exhaust systems in aircraft environmental control system laboratories currently include: 1. The high-temperature and high-pressure gas emissions after the test are noisy, and the noise from exhaust inlet, gas transmission, and outdoor emissions is difficult to control.

[0006] 2. The heat of the high-temperature and high-pressure gas after the experiment was not effectively utilized, and the gas was released into the atmosphere at high temperature, which could easily lead to environmental problems.

[0007] 3. The pressure inside the exhaust pipe is not effectively controlled. It is impossible to guarantee different exhaust pressures at the exhaust ports of each device. When test devices with different exhaust pressures connected to the same exhaust pipe work simultaneously, problems such as exhaust pressure fluctuations and exhaust pressures exceeding the back pressure limit of some devices may occur. Utility Model Content

[0008] To address the problems of high noise levels from high-temperature, high-pressure gas emissions after testing, including noise from exhaust inlet, gas transmission, and outdoor discharge that is difficult to control; ineffective utilization of the heat from the high-temperature, high-pressure gas after testing, and environmental impact caused by the gas being discharged into the atmosphere at high temperatures; and the lack of effective pressure control within the exhaust pipe, making it impossible to guarantee different exhaust pressures at each equipment's exhaust interface, and the potential for mutual interference when test equipment connected to the same exhaust pipe operates simultaneously, such as exhaust pressure fluctuations and exhaust pressure exceeding the back pressure limit of some equipment, this paper proposes an automatic pressure-regulating, heat-recovery, and noise-reducing exhaust system for aircraft environmental control system test laboratories.

[0009] In view of this, according to one aspect of the present invention, an automatic pressure-regulating, heat-recovery, silencing exhaust device for an aircraft environmental control system test chamber is provided, comprising an exhaust pipe 1, an electric pressure regulator 4, a silencer 5, a main pipe pressure sensor 6, a branch pipe pressure sensor 7, a lithium bromide heat recovery system 8, an automatic control fan 9, an outdoor silencer tower 10, and an automatic controller 11. The exhaust pipe 1 includes an exhaust main pipe, a test equipment exhaust branch pipe, an exhaust pipe lithium bromide heat recovery system outlet, and an exhaust pipe lithium bromide heat recovery system inlet. The exhaust pipe is automatically controlled. The exhaust pipe 1, located underground in the aircraft environmental control test chamber, has branch outlets extending above ground at each test equipment exhaust point. The test equipment exhaust branch pipes of exhaust pipe 1 are connected to the exhaust outlets of each test equipment within the environmental control test chamber. The exhaust pipe's lithium bromide heat recovery system outlet is connected to the inlet of lithium bromide heat recovery system 8, and its inlet is connected to the outlet. The exhaust pipe's automatic control fan outlet is connected to the inlet of automatic control fan 9. An electric pressure regulator 4 is installed on the test equipment exhaust branch pipe of exhaust pipe 1, with its control interface connected to... The automatic controller 11 is connected to its output port. A pipe silencer 5 is installed at the junction of the test equipment exhaust branch pipe and the main exhaust pipe of exhaust pipe 1. A main pipe pressure sensor 6 is installed at the junction of the test equipment exhaust branch pipe and the main exhaust pipe of exhaust pipe 1, and is connected to the automatic controller 11. A test equipment branch pipe pressure sensor 7 is installed on the test equipment exhaust branch pipe, and is connected to the automatic controller 11. The inlet of the lithium bromide heat recovery system 8 is connected to the output port of the lithium bromide heat recovery system in exhaust pipe 1, and the outlet of the lithium bromide heat recovery system 8 is connected to the exhaust pipe 1. The lithium bromide heat recovery system inlet is connected. The inlet of the automatic control fan 9 is connected to the outlet of the automatic control fan in the exhaust pipe 1. The outlet of the automatic control fan 9 is connected to the inlet of the outdoor silencer tower 10. The control interface of the automatic control fan 9 is connected to the automatic controller 11. The inlet of the outdoor silencer tower 10 is connected to the outlet of the automatic control fan 9. The outlet of the outdoor silencer tower 10 is open to the atmosphere. The input ports of the automatic controller 11 are connected to the main pipe pressure sensor 6 and the branch pipe pressure sensor 7 of the test equipment, respectively. The output ports are connected to the control interface of the pipeline electric pressure regulator 4 and the control interface of the automatic control fan 9, respectively. Optionally, it also includes an insulation layer 2, which is disposed outside the exhaust pipe 1.

[0010] Optionally, it also includes a sound insulation layer 3 disposed outside the thermal insulation layer 2.

[0011] Optionally, it also includes a branch pipe soundproof cover 12 for soundproofing the portion of the exhaust branch pipe above ground level of the test equipment of the exhaust pipe 1.

[0012] Optionally, the pipeline electric pressure regulator 4 is used for pressure control at the exhaust inlet of each test equipment, and the exhaust pressure of each equipment is set and controlled independently.

[0013] Optionally, the main pressure sensor 6 is used to monitor the pressure value at the junction of the branch pipe connected to each device and the main exhaust pipe in real time. When the value exceeds the maximum exhaust pressure of the device connected to the branch pipe, it indicates that the pressure of the main exhaust pipe is too high, so as to drive the controller to adjust the fan air volume.

[0014] This utility model discloses an automatic pressure-regulating, heat-recovery, and noise-reducing exhaust system for aircraft environmental control system test laboratories. It eliminates indoor and outdoor exhaust noise caused by high-temperature, high-pressure test gases with high flow rates within the test chamber. It ensures stable and reliable exhaust pressure during equipment operation, allowing for real-time monitoring and automatic adjustment. This ensures that each piece of test equipment connected to the exhaust system maintains a different exhaust pressure value when operating simultaneously, allowing for individual control and independent operation without mutual interference. Furthermore, it enables waste heat recovery from high-temperature, high-pressure gases, improving the energy efficiency of the test chamber, reducing the environmental impact of exhaust gases, and comprehensively enhancing the energy-saving and environmental protection level of aircraft environmental control test laboratories. It boasts advantages such as efficient indoor and outdoor noise reduction, centralized system control, stable and reliable exhaust pressure, real-time monitoring, independent controllability, automatic adjustment, waste heat recovery, energy saving and emission reduction, and environmental friendliness. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an automatic pressure regulating and heat recovery silencer exhaust system for an aircraft environmental control system laboratory.

[0016] In the diagram, (1) - exhaust pipe, (2) - insulation layer, (3) - sound insulation layer, (4, 4') - electric pressure regulator for the pipe, (5, 5') - pipe silencer, (6, 6') - main pipe pressure sensor, (7, 7') - branch pipe pressure sensor for the test equipment, (8) - lithium bromide heat recovery system, (9) - automatic control fan, (10) - outdoor silencer tower, (11) - automatic controller. (The number X' indicates that each test equipment is connected to a branch pipe and one test equipment is connected; the number of connected test equipment is not unique). Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] According to one aspect of the present invention, an automatic pressure-regulating, heat-recovery, silencer exhaust device for an aircraft environmental control system laboratory is provided, comprising an exhaust pipe 1, an electric pressure regulator 4, a silencer 5, a main pipe pressure sensor 6, a branch pipe pressure sensor 7, a lithium bromide heat recovery system 8, an automatic control fan 9, an outdoor silencer tower 10, and an automatic controller 11. The exhaust pipe 1 includes an exhaust main pipe, a branch pipe for the test equipment exhaust, an outlet for the lithium bromide heat recovery system, and an inlet for the lithium bromide heat recovery system. The automatic control fan in the exhaust pipe... The exhaust duct 1 is laid underground in the aircraft environmental control test chamber. Branch pipes extend above ground at the exhaust points of each test device. The test device exhaust branch pipes of exhaust duct 1 are connected to the exhaust outlets of each test device in the environmental control test chamber. The outlet of the lithium bromide heat recovery system in the exhaust duct is connected to the inlet of lithium bromide heat recovery system 8, and the inlet of the lithium bromide heat recovery system is connected to the outlet of lithium bromide heat recovery system 8. The outlet of the automatic control fan in the exhaust duct is connected to the inlet of the automatic control fan 9. An electric pressure regulator 4 is installed on the test device exhaust branch pipe of exhaust duct 1, and its control interface is connected to the automatic control fan 9. The controller 11 output port is connected; the pipeline silencer 5 is installed at the junction of the test equipment exhaust branch pipe and the exhaust main pipe of the exhaust pipeline 1; the main pipe pressure sensor 6 is installed at the junction of the test equipment exhaust branch pipe and the exhaust main pipe of the exhaust pipeline 1, and the main pipe pressure sensor 6 is connected to the automatic controller 11; the test equipment branch pipe pressure sensor 7 is installed at the test equipment exhaust branch pipe, and the test equipment branch pipe pressure sensor 7 is connected to the automatic controller 11; the inlet of the lithium bromide heat recovery system 8 is connected to the output port of the lithium bromide heat recovery system of the exhaust pipeline 1, and the outlet of the lithium bromide heat recovery system 8 is connected to the exhaust pipeline 1. The lithium bromide heat recovery system inlet is connected; the inlet of the automatic control fan 9 is connected to the outlet of the automatic control fan in the exhaust pipe 1; the outlet of the automatic control fan 9 is connected to the inlet of the outdoor silencer tower 10; the control interface of the automatic control fan 9 is connected to the automatic controller 11; the inlet of the outdoor silencer tower 10 is connected to the outlet of the automatic control fan 9; the outlet of the outdoor silencer tower 10 is open to the atmosphere; the input ports of the automatic controller 11 are connected to the main pipe pressure sensor 6 and the branch pipe pressure sensor 7 of the test equipment, respectively; and the output ports are connected to the control interface of the pipeline electric pressure regulator 4 and the control interface of the automatic control fan 9, respectively. Furthermore, it also includes a thermal insulation layer 2, which is disposed outside the exhaust pipe 1.

[0019] Furthermore, it also includes a sound insulation layer 3, which is disposed outside the insulation layer 2.

[0020] Furthermore, it also includes a branch pipe soundproof cover 12, used for soundproofing the part of the exhaust branch pipe above ground of the test equipment of the exhaust pipe 1.

[0021] Furthermore, the pipeline electric pressure regulator 4 is used for pressure control at the exhaust inlet of each test equipment, and the exhaust pressure of each equipment is set and controlled independently.

[0022] Furthermore, the main pressure sensor 6 is used to monitor the pressure value at the junction of each device's access branch pipe and the exhaust main pipe in real time. When its value exceeds the maximum exhaust pressure of the device connected to the branch pipe, it indicates that the exhaust main pipe pressure is too high, thereby driving the controller to adjust the fan airflow.

[0023] By laying underground exhaust pipes, installing pipe sound insulation layers, sound insulation covers for branch pipes at each equipment exhaust connection point, pipe silencers, and outdoor silencer towers, indoor and outdoor exhaust noise under high temperature, high pressure, and high flow velocity conditions is eliminated. By installing pressure sensors at each equipment exhaust connection point, electric pressure regulators for pipes, main pipe pressure sensors, automatic control fans, and automatic controllers, stable and reliable exhaust pressure is ensured during equipment operation. This allows for real-time monitoring and automatic adjustment, ensuring that the exhaust pressure of each test device connected to the exhaust system maintains a different value when operating simultaneously. Each device can be controlled individually, independently, and without affecting the others. By installing exhaust pipe insulation layers and a lithium bromide heat recovery system, waste heat from high temperature and high pressure gases is recovered, improving the laboratory's energy utilization efficiency, reducing the environmental impact of exhaust, and comprehensively enhancing the energy-saving and environmental protection level of the aircraft environmental control laboratory.

[0024] Example 1 like Figure 1 As shown, an automatic pressure-regulating, heat-recovery, silencer exhaust system for an aircraft environmental control system laboratory includes an exhaust pipe 1, an insulation layer 2, a sound insulation layer 3, electric pressure regulators 4 and 4', a silencer 5 and 5', main pipe pressure sensors 6 and 6', branch pipe pressure sensors 7 and 7', a lithium bromide heat recovery system 8, an automatic control fan 9, an outdoor silencer tower 10, an automatic controller 11, and branch pipe soundproof covers 12 and 12'. The number X' indicates that each branch pipe connects to one piece of equipment, and the number of connected equipment is not unique.

[0025] The exhaust duct 1 includes a main exhaust pipe, test equipment exhaust branch pipes, an exhaust duct lithium bromide heat recovery system inlet / outlet, an exhaust duct lithium bromide heat recovery system outlet, and an exhaust duct automatic control fan outlet. The exhaust duct 1 is laid underground in the aircraft environmental control laboratory, with branch pipe outlets extending above ground at each test equipment exhaust point. The test equipment exhaust branch pipes of the exhaust duct 1 are connected to the exhaust outlets of each test equipment in the environmental control laboratory. The exhaust duct lithium bromide heat recovery system inlet / outlet is connected to the inlet of the lithium bromide heat recovery system 8, the exhaust duct lithium bromide heat recovery system outlet is connected to the outlet of the lithium bromide heat recovery system 8, and the exhaust duct automatic control fan outlet is connected to the inlet of the automatic control fan 9.

[0026] The insulation layer 2 is used to insulate the high-temperature and high-pressure exhaust pipe, reduce heat loss for waste heat recovery, and reduce damage to the pipe trench and laboratory floor caused by thermal effects; the insulation layer 2 is set outside the exhaust pipe 1.

[0027] The sound insulation layer 3 is used for overall aerodynamic noise control of the exhaust pipe; the sound insulation layer 3 is set outside the heat insulation layer 2.

[0028] The electric pressure regulators 4 and 4' in the pipeline include a pressure regulator inlet, a pressure regulator outlet, a pressure regulating device, and a control interface. They are used for pressure control at the exhaust connection points of each test device. The exhaust pressure of each device is set and controlled independently to ensure that the exhaust pressure of each device meets its specific requirements and does not affect each other. The electric pressure regulators 4 and 4' in the pipeline are installed on the exhaust branch pipe of the test device in the exhaust pipeline 1, and the control interface is connected to the output port 1 of the automatic controller 11.

[0029] The pipeline silencers 5 and 5' include an inlet, an outlet, and a silencer module, and are used for centralized aerodynamic noise control at the exhaust access points of each test equipment. The pipeline silencers 5 and 5' are installed at the junction of the test equipment exhaust branch pipe and the main exhaust pipe of the exhaust pipeline 1.

[0030] The main pressure sensors 6 and 6' are used to monitor the pressure value at the junction of the branch pipe connected to each device and the main exhaust pipe in real time. When the value exceeds the maximum exhaust pressure of the device connected to the branch pipe, it indicates that the pressure of the main exhaust pipe is too high, thereby driving the controller to adjust the fan airflow. The main pressure sensors 6 and 6' are installed at the junction of the test equipment exhaust branch pipe and the main exhaust pipe of the exhaust pipeline 1, and the main pressure sensors 6 and 6' are connected to the input port 1 of the automatic controller 11.

[0031] The pressure sensors 7 and 7' of the test equipment branch pipe are used to monitor the pressure value at the end of each device connected to the branch pipe in real time, so as to drive the controller to adjust the electric pressure regulator. The pressure sensors 7 and 7' of the test equipment branch pipe are installed in the exhaust branch pipe of the test equipment and are connected to the input port 2 of the automatic controller 11.

[0032] The lithium bromide heat recovery system 8 includes an inlet, an outlet, and a heat recovery system, used to recover waste heat from the high-temperature and high-pressure exhaust pipe. The inlet of the lithium bromide heat recovery system 8 is connected to the output port of the lithium bromide heat recovery system of the exhaust pipe 1, and the outlet of the lithium bromide heat recovery system 8 is connected to the inlet of the lithium bromide heat recovery system of the exhaust pipe 1.

[0033] The automatic control fan 9 includes an inlet, an outlet, and a control interface, and is used to regulate the pressure inside the main exhaust pipe of the exhaust pipe 1. The inlet of the automatic control fan 9 is connected to the output port of the automatic control fan in the exhaust pipe 1, the outlet of the automatic control fan 9 is connected to the inlet of the outdoor silencer tower 10, and the control interface of the automatic control fan 9 is connected to the output port 2 of the automatic controller 11.

[0034] The outdoor silencer tower 10 includes an inlet, an outlet, and a silencer device, used for the outdoor end-of-line silencing of the exhaust system. The inlet of the outdoor silencer tower 10 is connected to the outlet of the automatic control fan 9, and the outlet of the outdoor silencer tower 10 is open to the atmosphere.

[0035] The automatic controller 11 includes input port 1, input port 2, output port 1, and output port 2. It receives monitoring signals from the main pipe pressure sensors 6 and 6' and the branch pipe pressure sensors 7 and 7' of the test equipment, displays them in real time, and drives the pipeline electric pressure regulators 4 and 4' and the automatic control fan 9 to make corresponding adjustments according to set parameters and control logic. Input port 1 of the automatic controller 11 is connected to the main pipe pressure sensors 6 and 6', input port 2 is connected to the branch pipe pressure sensors 7 and 7' of the test equipment, output port 1 is connected to the control interface of the pipeline electric pressure regulators 4 and 4', and output port 2 is connected to the control interface of the automatic control fan 9.

[0036] The branch pipe soundproof covers 12 and 12' are used for soundproofing the part of the exhaust branch pipe above ground of the test equipment of the exhaust pipe 1.

[0037] Example 2 like Figure 1 As shown, an automatic pressure-regulating, heat-recovery, silencer exhaust system for an aircraft environmental control system laboratory includes an exhaust pipe 1, an insulation layer 2, a sound insulation layer 3, electric pressure regulators 4 and 4', a silencer 5 and 5', main pipe pressure sensors 6 and 6', branch pipe pressure sensors 7 and 7', a lithium bromide heat recovery system 8, an automatic control fan 9, an outdoor silencer tower 10, an automatic controller 11, and branch pipe soundproof covers 12 and 12'. The number X' indicates that each branch pipe connects to one piece of equipment, and the number of connected equipment is not unique.

[0038] The exhaust duct 1 includes a main exhaust pipe, test equipment exhaust branch pipes, an exhaust duct lithium bromide heat recovery system inlet / outlet, an exhaust duct lithium bromide heat recovery system outlet, and an exhaust duct automatic control fan outlet. The exhaust duct 1 is laid underground in the aircraft environmental control laboratory, with branch pipe outlets extending above ground at each test equipment exhaust point. The test equipment exhaust branch pipes of the exhaust duct 1 are connected to the exhaust outlets of each test equipment in the environmental control laboratory. The exhaust duct lithium bromide heat recovery system inlet / outlet is connected to the inlet of the lithium bromide heat recovery system 8, the exhaust duct lithium bromide heat recovery system outlet is connected to the outlet of the lithium bromide heat recovery system 8, and the exhaust duct automatic control fan outlet is connected to the inlet of the automatic control fan 9.

[0039] The insulation layer 2 is used to insulate the high-temperature and high-pressure exhaust pipe, reduce heat loss for waste heat recovery, and reduce damage to the pipe trench and laboratory floor caused by thermal effects; the insulation layer 2 is set outside the exhaust pipe 1.

[0040] The sound insulation layer 3 is used for overall aerodynamic noise control of the exhaust pipe; the sound insulation layer 3 is set outside the heat insulation layer 2.

[0041] The electric pressure regulators 4 and 4' in the pipeline include a pressure regulator inlet, a pressure regulator outlet, a pressure regulating device, and a control interface. They are used for pressure control at the exhaust connection points of each test device. The exhaust pressure of each device is set and controlled independently to ensure that the exhaust pressure of each device meets its specific requirements and does not affect each other. The electric pressure regulators 4 and 4' in the pipeline are installed on the exhaust branch pipe of the test device in the exhaust pipeline 1, and the control interface is connected to the output port 1 of the automatic controller 11.

[0042] The pipeline silencers 5 and 5' include an inlet, an outlet, and a silencer module, and are used for centralized aerodynamic noise control at the exhaust access points of each test equipment. The pipeline silencers 5 and 5' are installed at the junction of the test equipment exhaust branch pipe and the main exhaust pipe of the exhaust pipeline 1.

[0043] The main pressure sensors 6 and 6' are used to monitor the pressure value at the junction of the branch pipe connected to each device and the main exhaust pipe in real time. When the value exceeds the maximum exhaust pressure of the device connected to the branch pipe, it indicates that the pressure of the main exhaust pipe is too high, thereby driving the controller to adjust the fan airflow. The main pressure sensors 6 and 6' are installed at the junction of the test equipment exhaust branch pipe and the main exhaust pipe of the exhaust pipeline 1, and the main pressure sensors 6 and 6' are connected to the input port 1 of the automatic controller 11.

[0044] The pressure sensors 7 and 7' of the test equipment branch pipe are used to monitor the pressure value at the end of each device connected to the branch pipe in real time, so as to drive the controller to adjust the electric pressure regulator. The pressure sensors 7 and 7' of the test equipment branch pipe are installed in the exhaust branch pipe of the test equipment and are connected to the input port 2 of the automatic controller 11.

[0045] The lithium bromide heat recovery system 8 includes an inlet, an outlet, and a heat recovery system, used to recover waste heat from the high-temperature and high-pressure exhaust pipe. The inlet of the lithium bromide heat recovery system 8 is connected to the output port of the lithium bromide heat recovery system of the exhaust pipe 1, and the outlet of the lithium bromide heat recovery system 8 is connected to the inlet of the lithium bromide heat recovery system of the exhaust pipe 1.

[0046] The automatic control fan 9 includes an inlet, an outlet, and a control interface, and is used to regulate the pressure inside the main exhaust pipe of the exhaust pipe 1. The inlet of the automatic control fan 9 is connected to the output port of the automatic control fan in the exhaust pipe 1, the outlet of the automatic control fan 9 is connected to the inlet of the outdoor silencer tower 10, and the control interface of the automatic control fan 9 is connected to the output port 2 of the automatic controller 11.

[0047] The outdoor silencer tower 10 includes an inlet, an outlet, and a silencer device, used for the outdoor end-of-line silencing of the exhaust system. The inlet of the outdoor silencer tower 10 is connected to the outlet of the automatic control fan 9, and the outlet of the outdoor silencer tower 10 is open to the atmosphere.

[0048] The automatic controller 11 includes input port 1, input port 2, output port 1, and output port 2. It receives monitoring signals from the main pipe pressure sensors 6 and 6' and the branch pipe pressure sensors 7 and 7' of the test equipment, displays them in real time, and drives the pipeline electric pressure regulators 4 and 4' and the automatic control fan 9 to make corresponding adjustments according to set parameters and control logic. Input port 1 of the automatic controller 11 is connected to the main pipe pressure sensors 6 and 6', input port 2 is connected to the branch pipe pressure sensors 7 and 7' of the test equipment, output port 1 is connected to the control interface of the pipeline electric pressure regulators 4 and 4', and output port 2 is connected to the control interface of the automatic control fan 9.

[0049] The branch pipe soundproof covers 12 and 12' are used for soundproofing the part of the exhaust branch pipe above ground of the test equipment of the exhaust pipe 1.

[0050] The working process of an automatic pressure regulating and heat recovery silencer exhaust system for an aircraft environmental control system laboratory is as follows: 1 silencer After the environmental control test, the high-temperature and high-pressure gas is output from the exhaust port of the test equipment and connected to the exhaust branch pipe of the test equipment in the exhaust pipe 1. The part of the exhaust branch pipe above the ground is equipped with branch pipe sound insulation covers 12 and 12', which eliminates the noise of the exhaust system above the indoor ground. After the environmental control test, the high-temperature and high-pressure gas passes through the exhaust branch pipe of the test equipment in the exhaust pipe 1 and enters the exhaust main pipe of the exhaust pipe 1 in the pipe trench. At this insertion point, the flow velocity of the high-temperature and high-pressure gas after the test is high, and there is an airflow impact phenomenon at the vertical connection of the pipe. The pipe silencers 5 and 5' are used to control the aerodynamic noise concentration point. After the environmental control test, the high-temperature and high-pressure gas flows to the outside along the exhaust main pipe of the exhaust pipe 1 in the pipe trench. The exhaust main pipe of the exhaust pipe 1 is wrapped by the sound insulation layer 3, which eliminates the noise of the exhaust system below the indoor ground. After the environmental control test, the high-temperature and high-pressure gas enters the outdoor silencer tower 10 at the end of the exhaust main pipe of the exhaust pipe 1 and is discharged into the atmosphere, which eliminates the noise at the end of the exhaust system outdoors.

[0051] 2 Automatic voltage regulation After the environmental control test, the high-temperature and high-pressure gas is output from the exhaust port of the test equipment. After passing through the test equipment branch pipe pressure sensors 7 and 7' and the pipeline electric pressure regulators 4 and 4' on the exhaust branch pipe of the test equipment in the exhaust pipe 1, it enters the main exhaust pipe. The test equipment branch pipe pressure sensors 7 and 7' are connected to the input port 2 of the automatic controller 11. The automatic controller 11 monitors the exhaust pressure parameter of the test equipment at this location in real time. By comparing and calculating with the preset value, the automatic controller 11 drives the pipeline electric pressure regulators 4 and 4' connected to its output port 1 to adjust in real time according to the set logic to ensure that the exhaust pressure of the test equipment is maintained at the set value.

[0052] When multiple environmental control test devices with large differences in exhaust pressure work simultaneously, the branch pipe pressure sensors 7, 7' and pipeline electric pressure regulators 4, 4' of each test device also work simultaneously. Through the individual control of the automatic controller 11, the different exhaust pressure values ​​of different test devices are independently guaranteed, and there will be no mutual influence such as exhaust pressure fluctuations.

[0053] Since high-temperature and high-pressure gases at different pressures in different test equipment are all discharged into the main exhaust pipe of exhaust pipe 1, the pressure value inside the main exhaust pipe may exceed the upper limit of the back pressure of the equipment with lower exhaust pressure, resulting in the inability to discharge gas. The main pipe pressure sensors 6 and 6' installed on the main exhaust pipe of exhaust pipe 1 will collect the pressure data in the main exhaust pipe in real time and upload it to the automatic controller 11 through the input port 2 of the automatic controller 11 connected to it. The automatic controller 11 drives the automatic control fan 9 connected to its output port 2 to adjust the air volume, thereby adjusting the pressure inside the main exhaust pipe of exhaust pipe 1 until it is lower than the upper limit of the back pressure of the equipment with lower exhaust pressure, so that it can discharge gas smoothly. At the same time, the process of lowering the pressure inside the main exhaust pipe will not affect the discharge of other equipment with higher exhaust pressure.

[0054] 3. Heat recovery After the environmental control test, the high-temperature and high-pressure gas is output from the exhaust port of the test equipment, passes through the exhaust branch pipe of the test equipment in exhaust pipe 1, and enters the main exhaust pipe. The main exhaust pipe of exhaust pipe 1 is wrapped with insulation layer 2 to reduce heat loss in the high-temperature and high-pressure exhaust pipe to ensure the waste heat recovery effect, while reducing the damage to the pipe trench and test chamber floor caused by thermal effects. After the environmental control test, the high-temperature and high-pressure gas enters the heat recovery system through the output port of the lithium bromide heat recovery system 8 and the inlet of the lithium bromide heat recovery system 8 in exhaust pipe 1 for waste heat recovery. According to the current status of domestic aircraft environmental control tests and the research on lithium bromide heat recovery system products, the high-temperature and high-pressure gas after the environmental control test can meet the temperature requirements of the heat source of the current lithium bromide heat recovery system products. After passing through the lithium bromide heat recovery system 8 and completing the waste heat recovery process, the high-temperature and high-pressure gas after the environmental control test returns from the outlet of the lithium bromide heat recovery system 8 and the inlet of the lithium bromide heat recovery system in exhaust pipe 1 back into the main exhaust pipe of exhaust pipe 1 to continue to the end of the exhaust system.

[0055] The above description is merely a specific embodiment of this utility model, providing a detailed description of the utility model. Parts not covered in detail are conventional techniques. However, the protection scope of this utility model 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 this utility model should be included within the protection scope of this utility model. The protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An automatic pressure-regulating, heat-recovery, silencer exhaust device for an aircraft environmental control system laboratory, characterized in that, The system includes an exhaust pipe (1), an electric pressure regulator (4), a silencer (5), a main pipe pressure sensor (6), a branch pipe pressure sensor (7), a lithium bromide heat recovery system (8), an automatic control fan (9), an outdoor silencer tower (10), and an automatic controller (11). The exhaust pipe (1) includes an exhaust main pipe, a branch pipe of the test equipment, an outlet of the lithium bromide heat recovery system, an inlet of the lithium bromide heat recovery system, and an outlet of the automatic control fan. The exhaust pipe (1) is laid underground in the aircraft environmental control test room, with branch pipe outlets at each test equipment exhaust point. Extending above the ground, the exhaust branch pipe of the test equipment in the exhaust pipe (1) is connected to the exhaust outlet of each test equipment in the environmental control test chamber. The outlet of the lithium bromide heat recovery system in the exhaust pipe is connected to the inlet of the lithium bromide heat recovery system (8). The inlet of the lithium bromide heat recovery system in the exhaust pipe is connected to the outlet of the lithium bromide heat recovery system (8). The outlet of the automatic control fan in the exhaust pipe is connected to the inlet of the automatic control fan (9). The electric pressure regulator (4) in the pipe is installed on the exhaust branch pipe of the test equipment in the exhaust pipe (1). The control interface is connected to the output port of the automatic controller (11). The silencer (5) in the pipe is installed on the test branch pipe of the exhaust pipe (1). At the junction of the equipment exhaust branch pipe and the exhaust main pipe, the main pipe pressure sensor (6) is installed at the junction of the test equipment exhaust branch pipe and the exhaust main pipe of the exhaust pipe (1). The main pipe pressure sensor (6) is connected to the automatic controller (11). The test equipment branch pipe pressure sensor (7) is installed at the test equipment exhaust branch pipe. The test equipment branch pipe pressure sensor (7) is connected to the automatic controller (11). The inlet of the lithium bromide heat recovery system (8) is connected to the outlet of the lithium bromide heat recovery system of the exhaust pipe (1). The outlet of the lithium bromide heat recovery system (8) is connected to the inlet of the lithium bromide heat recovery system of the exhaust pipe (1). The automatic controller... The inlet of the blower (9) is connected to the output port of the automatic control blower of the exhaust pipe (1), the outlet of the automatic control blower (9) is connected to the inlet of the outdoor silencer tower (10), the control interface of the automatic control blower (9) is connected to the automatic controller (11), the inlet of the outdoor silencer tower (10) is connected to the outlet of the automatic control blower (9), the outlet of the outdoor silencer tower (10) is connected to the atmosphere, the input port of the automatic controller (11) is connected to the main pressure sensor (6) and the branch pressure sensor (7) of the test equipment respectively, and the output port is connected to the control interface of the pipeline electric pressure regulator (4) and the control interface of the automatic control blower (9) respectively.

2. The apparatus according to claim 1, characterized in that, It also includes a thermal insulation layer (2), which is located outside the exhaust pipe (1).

3. The apparatus according to claim 2, characterized in that, It also includes a sound insulation layer (3) which is placed outside the insulation layer (2).

4. The apparatus according to claim 1, characterized in that, It also includes a branch pipe soundproof cover (12), which is used for the test equipment of the exhaust pipe (1) and the soundproofing of the part of the exhaust branch pipe above the ground.

5. The apparatus according to claim 1, characterized in that, The pipeline electric pressure regulator (4) is used for pressure control at the exhaust inlet of each test equipment. The exhaust pressure of each equipment is set and controlled independently.

6. The apparatus according to claim 1, characterized in that, The main pressure sensor (6) is used to monitor the pressure value at the junction of the branch pipe connected to each device and the main exhaust pipe in real time. When its value exceeds the maximum exhaust pressure of the device connected to the branch pipe, it indicates that the pressure of the main exhaust pipe is too high, so as to drive the controller to adjust the fan air volume.

Images