Exhaust device, thermal infrared camouflage smoke abatement device with exhaust device and cooling device with exhaust device

Abstract

The utility model relates to the technical field of thermal infrared camouflage, and discloses an exhaust device which is characterized in that a shelter is positioned above or on the side surface or below an exhaust nozzle, an outlet of the exhaust nozzle faces the shelter, and ventilation equipment supplies air to a gas channel between the shelter and the outlet of the exhaust nozzle. And an ambient air isolation layer is formed between the shielding object and hot air exhausted from the outlet of the exhaust nozzle. The outlet of the exhaust nozzle faces the shelter, so that the exposure area of the exhaust nozzle in the reconnaissance direction is reduced, but the shelter is not heated due to the isolation effect of the air layer, and the purpose of reducing the thermal infrared exposure of the outlet of the exhaust nozzle is achieved. The flow guide device is arranged to guide air supplied by the ventilation equipment, so that an environment air isolation layer is easier to form. The utility model further discloses a thermal infrared camouflage smoke abatement device which comprises a smoke abatement device and the exhaust device. The utility model further discloses a thermal infrared disguise cooling device which comprises a cooling tower and the exhaust device. The problem of thermal infrared exposure of high-temperature exhaust targets such as a diesel power station and a cooling tower is solved.

Description

Technical field:

[0001] The utility model relates to the technical field of thermal infrared camouflage, in particular to an exhaust device and a thermal infrared camouflage smoke elimination device and a cooling device having the exhaust device. Background technology:

[0002] Heat sources such as diesel engines, gasoline engines, and cooling towers are widely used on battlefields or in military projects. These devices discharge hot gases when in use, or ventilation equipment such as fans can be installed to dissipate the heat through the hot gases. The mouths of the hot gas discharge channels have obvious signs of thermal infrared exposure, making them thermal infrared exposed targets on the battlefield and vulnerable to attack. Patent applications with application numbers 202322887702.3 and 202220462339.3 relate to exhaust devices that perform thermal infrared camouflage on the mouths of these hot gas discharge channels. In these patent applications, the mouths of the hot gas discharge channels are generally referred to as exhaust nozzles; in addition to the exhaust nozzles, they also include shielding covers or sleeves, which are collectively referred to as shields in this utility model. The shields are located above or around the exhaust nozzles. In these patent applications, in order to prevent the hot gas discharged from the exhaust nozzles from heating the shields, the direction of the exhaust nozzle outlet is as far away from the shields as possible. This creates a problem: when a thermal imager is tilted from the air or aimed at the exhaust nozzle, the nozzle outlet can be captured. However, since the exhaust nozzle emits hot air, the temperature at the nozzle outlet is much higher than the ambient temperature, making it easily visible and failing to meet the requirements of thermal infrared camouflage. When applied to heat sources with large hot gas flows, such as cooling towers, the nozzle outlet is large, with a diameter of 1 meter or more, and the exposure is even more obvious. Summary of the invention:

[0003] The purpose of the utility model is to overcome the problems existing in the above prior art and to provide an exhaust device with a simple structure and capable of reducing the thermal infrared exposure symptoms at the exhaust nozzle outlet.

[0004] The utility model also provides a thermal infrared camouflage smoke elimination device, which has the above-mentioned exhaust device and can reduce the optical and thermal infrared exposure signs of exhaust heat sources such as diesel generators.

[0005] The utility model also provides a thermal infrared camouflage cooling device, which has the above-mentioned exhaust device and can reduce the optical and thermal infrared exposure signs of the cooling tower.

[0006] The technical solution of the utility model is:

[0007] An exhaust device, comprising an exhaust nozzle, a shelter, an air venting device, the exhaust nozzle having an inlet and an outlet, the inlet of the exhaust nozzle being a hot gas inlet, the shelter being above or beside or below the exhaust nozzle, the outlet of the exhaust nozzle facing the shelter, a gas passage being between the outlet of the exhaust nozzle and the shelter, the outlet of the air venting device being communicated with the gas passage, and the inlet of the air venting device being communicated with ambient air.

[0008] As a preferred technical solution, the exhaust nozzle is provided with a heat insulation material.

[0009] As a preferred technical solution, a flow guiding device is arranged at the inlet of the gas passage.

[0010] As a preferred technical solution, the angle a between the direction in which the outlet of the exhaust nozzle faces and the surface of the shelter in which the outlet of the exhaust nozzle faces is greater than 5 degrees and less than 180 degrees.

[0011] A hot infrared camouflage smoke elimination device, comprising the smoke elimination device and the above-mentioned exhaust device, the outlet of the smoke elimination device being communicated with the inlet of the exhaust nozzle of the exhaust device, the inlet of the smoke elimination device being a hot smoke gas inlet, and the smoke elimination device being an electric dust collector or a filter dust collector.

[0012] As a preferred technical solution, a shelter B is arranged above the hot infrared camouflage smoke elimination device.

[0013] A hot infrared camouflage cooling device, comprising a cooling tower and the above-mentioned exhaust device, the outlet of the cooling tower being communicated with the inlet of the exhaust nozzle of the exhaust device.

[0014] As a preferred technical solution, a shelter C is arranged above the hot infrared camouflage cooling device.

[0015] The principle of the utility model is as follows:

[0016] The exhaust device works as follows: hot air enters the exhaust nozzle inlet, passes through the nozzle, and is discharged through the nozzle outlet. A shield is located above, to the side, or below the exhaust nozzle, with the nozzle outlet facing the shield. An air passage is formed between the shield and the nozzle outlet, connecting the ventilation device outlet to this air passage, while the ventilation device inlet is connected to the ambient air. When the ventilation device is activated, ambient air is drawn into the ventilation device inlet and delivered through the outlet into this air passage. Because the nozzle outlet faces the shield, the hot air from the nozzle outlet flows toward the shield. Because the ventilation device delivers ambient air into the air passage between the shield and the nozzle outlet, a layer of ambient air forms between the shield and the hot air from the nozzle outlet. This layer of ambient air isolates the hot air from the nozzle outlet from the shield, preventing the shield from heating and preventing signs of thermal infrared exposure. This insulating layer of ambient air is called an ambient air isolation layer, and the technology of using ambient air to isolate hot air is called air layer isolation technology. The guide device is provided at the inlet of the gas passage between the shield and the outlet of the exhaust nozzle. Its function is to guide the airflow entering the gas passage so that the ambient air can better isolate the hot air discharged from the outlet of the exhaust nozzle from the shield. For example, more ambient air can be guided to the surface of the shield directly in front of the outlet of the exhaust nozzle to ensure the formation of an ambient air isolation layer and to ensure that the shield is not heated. The ambient air can also be guided to other parts that are easily heated. In addition, the guide device can also block the ventilation equipment behind it to reduce the exposure signs of the ventilation equipment. The outlet of the exhaust nozzle of the utility model faces the shield. When the thermal infrared imager scouts and photographs the exhaust nozzle from the outside, the exposed area of ​​the exhaust nozzle outlet in the scouting direction will be reduced, thereby reducing its exposure signs. If the obstruction is above the exhaust nozzle and the angle a between the nozzle's outlet and the obstruction's surface approaches 90 degrees, meaning the nozzle's outlet is nearly perpendicular to the obstruction, then during horizontal reconnaissance from the outside, the nozzle's outlet appears to be aligned with the reconnaissance direction, significantly reducing its exposed area and, accordingly, its exposure symptom. If the angle exceeds 90 degrees, the nozzle's outlet is completely invisible from the outside. By adjusting the obstruction's extension length and angle a, the nozzle's outlet can be made invisible even during oblique aerial reconnaissance. Because hot gas flows through the nozzle, the nozzle's wall temperature is relatively high. Insulating the nozzle with thermal insulation can reduce its thermal infrared exposure. Thus, orienting the nozzle's outlet toward the obstruction reduces its exposed area in the reconnaissance direction, while also preventing the obstruction from heating due to the insulating effect of the air layer. This achieves the goal of reducing the nozzle's thermal infrared exposure.

[0017] The principle of the thermal infrared camouflage smoke elimination device is that the thermal source of diesel engine and other thermal sources with smoke is the main thermal source in the battlefield, the smoke thereof has color and obvious optical exposure symptom, the smoke elimination device can eliminate smoke and reduce the optical exposure symptom of the smoke. The electric dust collector can eliminate black smoke and white or blue smoke in the smoke and can completely eliminate the optical exposure symptom of the smoke. The filtering dust collector filters solid particles in the smoke through the ceramic filter or the metal filter and can only eliminate black smoke in the smoke and can reduce the optical exposure symptom of the smoke. After the smoke outlet of the thermal source is connected with the inlet of the smoke elimination device, the smoke passes through the smoke elimination device, and the optical exposure symptom of the smoke is reduced. The outlet of the smoke elimination device is connected with the inlet of the exhaust nozzle of the exhaust device, and the thermal infrared exposure symptom of the smoke is further reduced through the exhaust device. The general reconnaissance of the ground target mainly comes from above the target, and the shielding object B arranged above the thermal infrared camouflage smoke elimination device can most effectively reduce the exposure. The shielding object B can be a camouflage net, a board or a concrete board and the like. If necessary, other shielding objects can be arranged at the side of the thermal infrared camouflage smoke elimination device or the shielding objects are connected into a device room, and holes are left on the device room for the thermal infrared camouflage smoke elimination device to discharge smoke, smoke or air and the like. The shielding object B can reduce the optical and thermal infrared exposure symptom of the outer surface of the thermal infrared camouflage smoke elimination device.

[0018] The principle of the thermal infrared camouflage cooling device is that the cooling tower is a heat dissipation device of the underground military engineering such as the command post and the communication engineering, the exhaust temperature of the cooling tower is high, and the outlet thereof has obvious thermal infrared exposure symptom. The outlet of the cooling tower is connected with the inlet of the exhaust nozzle of the exhaust device, and the thermal infrared exposure symptom of the outlet of the cooling tower is reduced through the exhaust device. The general reconnaissance of the ground target mainly comes from above the target, and the shielding object C arranged above the thermal infrared camouflage cooling device can most effectively reduce the exposure. The shielding object C can be a camouflage net, a board or a concrete board and the like. If necessary, other shielding objects can be arranged at the side of the thermal infrared camouflage cooling device or the shielding objects are connected into a device room, and holes are left on the device room for the thermal infrared camouflage cooling device to discharge exhaust or air and the like. The shielding object C can reduce the optical and thermal infrared exposure symptom of the outer surface of the thermal infrared camouflage cooling device.

[0019] Here, several points are explained:

[0020] 1. The shielding object in the utility model can be a flat plate or an arc-shaped plate and the like, can be the enclosure structure such as the roof or the wall of the device room and sometimes can be the ground. The shielding object can be arranged at one direction of the exhaust nozzle; the shielding object can also be arranged at multiple directions at the same time, and the outlet of the exhaust nozzle only faces the shielding object at one direction. In addition to the shielding object facing the outlet of the exhaust nozzle, the connecting objects such as the board or the support and the like can also be arranged at other directions around the exhaust nozzle for the convenience of fixing the exhaust nozzle and the shielding object, connecting the ventilation device and the like.

[0021] 2. In the present invention, a gas passage exists between the shield and the outlet of the exhaust nozzle, and the outlet of the ventilation device is connected to the gas passage. As long as the outlet of the ventilation device is connected to the gas passage and the air discharged from the ventilation device can enter the gas passage, regardless of how and where the air enters the passage, it is within the scope of protection of the present invention.

[0022] 3. The flow guide device described in this utility model is located at the entrance of the gas passage between the shield and the outlet of the exhaust nozzle. This means that it can be located at the entrance or at a position adjacent to it. Its location can guide the ambient air entering the gas passage, primarily toward the shield, thereby forming an insulating layer of ambient air between the shield and the hot air discharged from the outlet of the exhaust nozzle. Part of the flow guide device can also be used to direct part of the ambient air to other areas that may be heated by the hot air. The flow guide device can be plate-shaped or of other design; as long as it can guide the airflow, it is included in the scope of protection of this utility model.

[0023] The utility model has the following advantages over the prior art:

[0024] 1. To prevent the hot air from the exhaust nozzle outlet from heating the obstruction, the prior art attempts to prevent the exhaust nozzle outlet from facing the obstruction. This results in a large exposed area of ​​the exhaust nozzle outlet in the detection direction, and significant thermal infrared exposure symptoms. The technical concept of the present invention, however, is to direct the exhaust nozzle outlet toward the obstruction, reducing the exposed area of ​​the exhaust nozzle outlet in the detection direction. A ventilation device is then used to introduce ambient air, forming an ambient air isolation layer between the exhaust nozzle outlet and the obstruction it is facing. This prevents the obstruction from being heated and the obstruction from showing thermal infrared exposure symptoms, thereby achieving the goal of reducing thermal infrared exposure symptoms at the exhaust nozzle outlet. The technical concept of the present invention is significantly different from that of the prior art, and has significant beneficial effects.

[0025] 2. The guide device of the present invention can shield the ventilation equipment at the rear thereof, thereby reducing the exposure symptoms of the ventilation equipment.

[0026] 3. The thermal infrared camouflage smoke elimination device of the present invention is combined with the above-mentioned exhaust device, and a shielding object B is provided on the upper part, which can reduce the optical and thermal infrared exposure signs of exhaust heat sources such as diesel generators.

[0027] 4. The utility model of the thermal infrared camouflage cooling device combines the cooling tower with the above-mentioned exhaust device, and a shield C is provided on the upper part, which can reduce the optical and thermal infrared exposure signs of the cooling tower. Description of the drawings:

[0028] Figure 1 This is a cross-sectional schematic diagram of an exhaust device in an embodiment of the present utility model;

[0029] Figure 2 yes Figure 1 FF cross-sectional diagram;

[0030] Figure 3 This is a cross-sectional schematic diagram of a thermal infrared camouflage smoke elimination device in an embodiment of the present utility model;

[0031] Figure 4 This is a cross-sectional schematic diagram of a thermal infrared camouflage cooling device in an embodiment of the present utility model;

[0032] In the figure, 1 is the exhaust nozzle, 2 is the shield, 3 is the inlet of the exhaust nozzle, 4 is the outlet of the exhaust nozzle, 5 is the ventilation equipment, 6 is the gas channel between the shield and the outlet of the exhaust nozzle, 7 is the outlet of the ventilation equipment, 8 is the inlet of the ventilation equipment, 9 is the thermal insulation material on the wall of the exhaust nozzle, 10 is the flow guide device, 11 is the inlet of the gas channel between the shield and the outlet of the exhaust nozzle, 12 is the first connecting pipe, 13 is the smoke elimination device, 14 is the outlet of the smoke elimination device, 15 is the inlet of the smoke elimination device, 16 is the shield B, 17 is the second connecting pipe, 18 is the thermal insulation material of the second connecting pipe, 19 is the cooling tower, 20 is the outlet of the cooling tower, 21 is the third connecting pipe, 22 is the shield C, 23 is the thermal insulation material of the third connecting pipe, 24 is the connecting object, 25 is the direction of the outlet of the exhaust nozzle, and 26 is the surface of the shield facing the outlet of the exhaust nozzle. Specific implementation method:

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0034] like Figure 1 and Figure 2 An exhaust device shown includes an exhaust nozzle 1 and a shield 2. The exhaust nozzle 1 has an inlet 3 and an outlet 4. The inlet 3 of the exhaust nozzle 1 is a hot air inlet. It also includes a ventilation device 5. The shield 2 is located above the exhaust nozzle 1. The outlet 4 of the exhaust nozzle 1 faces the shield 2. There is a gas channel 6 between the shield 2 and the outlet 4 of the exhaust nozzle 1. The outlet 7 of the ventilation device 5 is connected to the gas channel 6 through a first connecting pipe 12. The inlet 8 of the ventilation device 5 is connected to the ambient air.

[0035] It also includes heat-insulating material. The wall surface of the exhaust nozzle 1 is provided with heat-insulating material 9.

[0036] The device further comprises a flow guiding device 10, which is provided at the inlet 11 of the gas channel 6. The flow guiding device 10 is a flat plate with an adjustable angle.

[0037] The angle a between the direction 25 toward which the outlet 4 of the exhaust nozzle 1 faces and the surface 26 of the shield 2 toward which the outlet 4 of the exhaust nozzle 1 faces is 100 degrees, so that the shield 2 can better shield the outlet 4 of the exhaust nozzle 1 .

[0038] The shield 2 is an arc-shaped plate. In order to facilitate the fixation of the exhaust nozzle 1 and the connection of the ventilation equipment 5, a connector 24 is provided at the lower part of the exhaust nozzle 1. The connector 24 is also an arc-shaped plate. The connector 24 is connected to the shield 2, which can not only fix the exhaust nozzle 1, but also be conveniently connected to the ventilation equipment 5 or the first connecting pipe 12 together with the shield 2.

[0039] The thick dashed arrows in the figure represent the flow direction of hot gas, and the thick solid arrows represent the flow direction of ambient air.

[0040] The principle of the exhaust device of this embodiment is as follows: hot gas enters from the inlet 3 of the exhaust nozzle 1, passes through the exhaust nozzle 1, and is discharged from the outlet 4 of the exhaust nozzle 1. The shield 2 is located above the exhaust nozzle 1, and the outlet 4 of the exhaust nozzle 1 faces the shield 2. There is a gas channel 6 between the shield 2 and the outlet 4 of the exhaust nozzle 1. The outlet 7 of the ventilation device 5 is connected to the gas channel 6 through the first connecting pipe 12, and the inlet 8 of the ventilation device 5 is connected to the ambient air. When the ventilation device 5 is started, the inlet 8 of the ventilation device 5 draws in ambient air and sends it from the outlet 7 to the air flow channel 6 through the first connecting pipe 12. Because the outlet 4 of the exhaust nozzle 1 faces the shield 2, the hot gas at the outlet 4 of the exhaust nozzle 1 will flow toward the shield 2. Because the ventilation equipment 5 sends ambient air into the air channel 6 between the shield 2 and the outlet 4 of the exhaust nozzle 1, a layer of ambient air will be formed between the shield 2 and the hot air discharged from the outlet 4 of the exhaust nozzle 1. This layer of ambient air will isolate the hot air discharged from the outlet 4 of the exhaust nozzle 1 from the shield 2, so that the shield 2 is not heated and there is no sign of thermal infrared exposure.

[0041] The flow guide device 10 is arranged at the entrance 11 of the gas passage 6 between the shelter 2 and the outlet 4 of the exhaust nozzle 1, and functions to guide the airflow entering the gas passage, so that the ambient air can better isolate the hot gas discharged from the outlet 4 of the exhaust nozzle 1 and the shelter 2. More ambient air can be guided to the surface of the shelter 2 directly in front of the outlet 4 of the exhaust nozzle 1, so as to ensure the formation of an ambient air isolation layer and ensure that the shelter is not heated. The flow guide device 10 can be directed to the gas passage 6 as shown, or part of the plate-shaped flow guide device can be adjusted in angle to direct part of the airflow to other positions that can be heated by hot gas. In addition, the flow guide device 10 can also shield the ventilation device 5 behind it, reducing the exposure of the ventilation device 5. The outlet 4 of the exhaust nozzle 1 is directed towards the shelter 2, and when a thermal infrared imager detects and photographs the exhaust nozzle 1 from the outside, the exposure area of the outlet 4 of the exhaust nozzle 1 in the detection direction is reduced, thereby reducing its exposure. In the embodiment, the angle a between the direction 25 towards which the outlet 4 of the exhaust nozzle 1 is directed and the surface 26 of the shelter 2 towards which the outlet 4 of the exhaust nozzle 1 is directed is 100 degrees, and when viewed from the outside, the outlet 4 of the exhaust nozzle 1 cannot be observed at all from the outside, and the thermal infrared exposure is greatly reduced. Because hot gas flows in the exhaust nozzle 1, the wall surface temperature of the exhaust nozzle 1 is high, and the wall surface of the exhaust nozzle 1 is provided with thermal insulation material, which can reduce the thermal infrared exposure of the exhaust nozzle 1. In this way, the purpose of reducing the thermal infrared exposure of the outlet 4 of the exhaust nozzle 1 is achieved.

[0042] As shown in the thermal infrared camouflage smoke elimination device, the outlet 14 of the smoke elimination device 13 and the inlet 3 of the exhaust nozzle 1 of the exhaust device are connected by a second communication pipe 17, the inlet 15 of the smoke elimination device 13 is a hot smoke inlet, and the smoke elimination device 13 is an electric dust collector. The shelter B16 is arranged above the thermal infrared camouflage smoke elimination device. The shelter B16 is a concrete plate. Figure 3

[0043] The principle of the thermal infrared camouflage smoke elimination device is that the hot source with smoke such as a diesel engine is the main heat source on the battlefield, and the smoke has color and obvious optical exposure. The smoke elimination device 13 is an electric dust collector, which can eliminate the optical exposure of the smoke. After the smoke outlet of the heat source is connected to the inlet 15 of the smoke elimination device 13, the smoke passes through the smoke elimination device 13, and the optical exposure of the smoke is reduced. The outlet 14 of the smoke elimination device 13 and the inlet 3 of the exhaust nozzle 1 of the exhaust device are connected by a communication pipe 17, and the thermal infrared exposure of the smoke outlet is reduced by the exhaust device. The detection of the ground target is mainly from above the target, and the shelter B16 arranged above the thermal infrared camouflage smoke elimination device can most effectively reduce the exposure.

[0044] As shown in the thermal infrared camouflage smoke elimination device, the outlet 14 of the smoke elimination device 13 and the inlet 3 of the exhaust nozzle 1 of the exhaust device are connected by a second communication pipe 17, the inlet 15 of the smoke elimination device 13 is a hot smoke inlet, and the smoke elimination device 13 is an electric dust collector. The shelter B16 is arranged above the thermal infrared camouflage smoke elimination device. The shelter B16 is a concrete plate. Figure 4 ​The thermal infrared camouflage cooling device shown includes a cooling tower 19 and the above-mentioned exhaust device. The outlet 20 of the cooling tower 19 and the inlet 3 of the exhaust nozzle 1 of the exhaust device are connected through a third connecting pipe 21.

[0045] The device further comprises a shielding member C22, which is an iron plate and is disposed above the thermal infrared camouflage cooling device.

[0046] The principle behind the thermal infrared camouflage cooling device is as follows: Cooling tower 19 is a heat dissipation device used in underground military projects such as command posts and communications facilities. Its exhaust temperature is high, and its outlet exhibits significant thermal infrared exposure. The outlet 20 of cooling tower 19 is connected to the inlet 3 of the exhaust nozzle 1 of the exhaust device via a third connecting pipe 21. The exhaust from cooling tower 19 is discharged to the outside through the exhaust device. Because the exhaust device reduces the thermal infrared exposure of outlet 4 of exhaust nozzle 1, the thermal infrared exposure of the cooling tower's exhaust outlet can be reduced by utilizing the exhaust device. Generally, reconnaissance of ground targets primarily occurs from above the target. Placing a shield C22 above the thermal infrared camouflage cooling device is the most effective way to minimize exposure.

[0047] If there is no enclosure structure between equipment, etc. to block them, the walls of the second connecting pipe 17 and the third connecting pipe 21 are provided with insulation materials, such as the insulation material 18 of the second connecting pipe and the insulation material 23 of the third connecting pipe, to prevent these connecting pipes from being exposed to thermal infrared.

[0048] In this embodiment, the guide device 10 is arranged in the pipe mouth of the inlet 11 of the gas channel 6 between the shield 2 and the outlet 4 of the exhaust nozzle 1, and can also be arranged in the first connecting pipe 12 adjacent to the inlet. These positions at the inlet 11 can guide the ambient air entering the gas channel 6.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Any modification or equivalent replacement of the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention should be included in the claims of the present invention.

Claims

1. An exhaust device comprising an exhaust nozzle and a shield, wherein the exhaust nozzle has an inlet and an outlet, and the inlet of the exhaust nozzle is a hot air inlet, characterized in that: It also includes a ventilation device, the shield is located above, to the side or below the exhaust nozzle, the outlet of the exhaust nozzle faces the shield, there is a gas channel between the shield and the outlet of the exhaust nozzle, the outlet of the ventilation device is connected to the gas channel, and the inlet of the ventilation device is connected to the ambient air.

2. The exhaust device according to claim 1, characterized in that: It also includes heat-insulating material, and the wall surface of the exhaust nozzle is provided with heat-insulating material.

3. The exhaust device according to claim 1 or 2, characterized in that: It also includes a flow guiding device, which is arranged at the inlet of the gas channel.

4. The exhaust device according to claim 1 or 2, characterized in that: An angle a between a direction in which the outlet of the exhaust nozzle faces and a surface of the shielding object toward which the outlet of the exhaust nozzle faces is greater than 5 degrees and less than 180 degrees.

5. The exhaust device according to claim 3, characterized in that: An angle a between a direction in which the outlet of the exhaust nozzle faces and a surface of the shielding object toward which the outlet of the exhaust nozzle faces is greater than 5 degrees and less than 180 degrees.

6. A thermal infrared camouflage smoke elimination device, characterized by: It comprises a smoke elimination device and an exhaust device according to any one of claims 1 to 5, wherein the outlet of the smoke elimination device is connected to the inlet of the exhaust nozzle of the exhaust device, the inlet of the smoke elimination device is a hot flue gas inlet, and the smoke elimination device is an electrostatic precipitator or a filter-type dust collector.

7. The thermal infrared camouflage smoke elimination device according to claim 6, characterized in that: It also includes a shielding object B, which is arranged above the thermal infrared camouflage smoke elimination device.

8. A thermal infrared camouflage cooling device, characterized in that: The exhaust device comprises a cooling tower and the exhaust device according to any one of claims 1 to 5, wherein the outlet of the cooling tower is communicated with the inlet of the exhaust nozzle of the exhaust device.

9. The thermal infrared camouflage cooling device according to claim 8, characterized in that: It also includes a shielding object C, which is arranged above the thermal infrared camouflage cooling device.

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