Enhanced exhaust device

Abstract

The enhanced exhaust device comprises a breather pipe, a protective cover, an outer flow guide cover and N inner flow guide covers, the outer edge size of the N = 1 inner flow guide cover is smaller than the inner edge size of the outer flow guide cover, an upper end opening of the N = 1 inner flow guide cover is inserted into a lower end opening of the outer flow guide cover, the outer edge size of the N = 2 inner flow guide cover is smaller than the inner edge size of the N = 1 inner flow guide cover, and the inner edge size of the N = 1 inner flow guide cover is smaller than the inner edge size of the outer flow guide cover. The upper port of the inner flow guide cover with N being equal to 2 is inserted into the lower port of the inner flow guide cover with N being equal to 1, and so on; the outer edge size of the ventilation pipe is smaller than the inner edge size of the Nth inner flow guide cover, an upper port of the ventilation pipe is inserted into a lower port of the Nth inner flow guide cover, gaps are reserved between the flow guide covers and between the Nth inner flow guide cover and the ventilation pipe, and the flow guide covers and the ventilation pipe are connected through the supporting bodies; the outer surface of each flow guide cover has a flow guide effect on incoming flow, a negative pressure area is generated at an air outlet in the lower end of each flow guide cover, and external airflow has suction and sweeping effects on air in the exhaust device. The device is high in exhaust pressure difference and large in gas displacement, and airflow cannot flow backwards.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ventilation and exhaust, in particular to an exhaust device for exhausting and enhancing the exhaust pressure and exhaust volume by using wind power, thermal power or photovoltaic power. BACKGROUND

[0002] With the exhaustion of fossil energy and its pollution to the environment, people pay more and more attention to the utilization of renewable energy, and wind energy, temperature difference energy and photovoltaic power are used in many aspects as renewable energy, which are also applied to ventilation and exhaust to a certain extent.

[0003] Now, several common exhaust devices using natural wind and temperature difference include: (1) spherical exhaust cap, so-called "unpowered fan", which uses natural wind to push the wind wheel to rotate, generates centrifugal force, and adds thermal buoyancy generated by temperature difference between inside and outside of building space to discharge indoor dirty gas. Its advantages: 1. beautiful appearance; 2. automatic adaptation to horizontal wind. Its disadvantages: 1. continuous rotating bearing is easy to be damaged and generate noise, and needs frequent lubrication and maintenance; 2. small exhaust pressure difference and low exhaust volume; 3. complex manufacturing process and large amount of materials; 4. easy to produce air flow backflow; 5. easy to leak rain when the exhaust cap is static; 6. needs high starting wind speed. (2) Venturi tube type exhaust device, which uses low pressure area generated by natural wind through nozzle or Laval nozzle to suck indoor dirty air. Its advantages: 1. simple structure and manufacturing process; 2. low cost. Its disadvantages: needs to set wind direction tracking device, needs lubrication and maintenance, small exhaust pressure difference and low exhaust volume. (3) wing type exhaust device, for example, the patent No. 201010594258.0 invented by the inventor, which has the advantages of: 1. simple structure; 2. no high-speed rotation and basically no maintenance. Its disadvantage is to set wind direction tracking device and small exhaust pressure difference. (4) wind gathering suction type exhaust device, for example, the patent No. 201010241209.9 invented by the inventor, which has the advantages of: 1. simple structure and no need for wind device; 2. no rotating parts and no maintenance. Its disadvantage is complex process, large amount of materials and easy to produce backflow phenomenon when encountering upward vertical flow or upward tangential flow or upward vortex flow. (5) straight pipe + protective cover type: this is the most traditional exhaust device, which has the advantage of simple structure. Its disadvantages: 1. easy to produce backflow phenomenon when encountering upward vertical flow or upward tangential flow or upward vortex flow; 2. small exhaust pressure difference and low exhaust efficiency. (6) cylindrical hood: has realized national standardized product, but has complex structure and needs to add water droplet water collecting device. Its disadvantages: small exhaust pressure difference, poor exhaust effect, and easy to produce backflow phenomenon when encountering upward vertical flow or upward tangential flow or upward vortex flow. (7) umbrella-shaped hood: has realized national standardized product, but has simple structure. Its disadvantages: large flow space needs to be left between the bottom outer edge of umbrella-shaped protective cover and the air outlet of air duct, resulting in poor effects of rain and snow prevention, insect prevention, bird prevention, low exhaust efficiency, and easy to produce backflow phenomenon when encountering upward vertical flow or upward tangential flow or upward vortex flow. (8) conical hood: has realized national standardized product, but has poor effects of insect prevention, bird prevention and miscellaneous prevention, small exhaust pressure difference, and needs to set water collecting device. Its disadvantage is easy to produce backflow phenomenon when encountering upward vertical flow or upward tangential flow or upward vortex flow.(9) Louver type: Advantages: no rotating parts, long service life, but prone to backflow when encountering upward vertical flow or upward tangential flow or upward vortex flow, small exhaust pressure difference. (10) Louver + wind fence type: The advantages are no rotating parts, good anti-backflow performance for upward wind cutting, but this product is easy to enter sundries, large in size, high in material consumption, high in cost, and small in exhaust pressure difference. (11) Single-layer fairing type: For example, the inventor of the present application invented: Patent No. 202120414621.X exhaust device, the advantages are: simple structure, no rotating parts, no maintenance, long service life, no noise, no backflow phenomenon when the wind direction is horizontal airflow or downward airflow, but due to the use of single-layer fairing, the exhaust pressure difference is small, and the exhaust volume is insufficient. And when encountering upward vertical flow or upward tangential flow or upward vortex flow, it is easy to produce backflow phenomenon.

[0004] In summary, the existing natural power exhaust device has the following problems: first, the exhaust pressure difference is small, and the exhaust volume is small. Second, due to the different structures of the top of the structure and the reflected airflow environment of the surrounding objects, when encountering different directions of wind, the airflow direction or airflow organization form flowing through the exhaust device is very complex. Sometimes the external wind is perpendicular to the vertical axis of the exhaust device, sometimes it is downward vertical flow, sometimes it is downward tangential flow, sometimes it is upward vertical flow, sometimes it is upward tangential flow, and sometimes it is upward vortex flow. If the structure design of the exhaust device is unreasonable, the airflow backflow problem will occur in some wind directions, and the airflow backflow will cause the accumulation of dirty gas or smoke in the structure, causing serious pollution to the living environment. SUMMARY

[0005] The technical problem solved by the present application is to seek an exhaust device that can utilize natural wind power, indoor and outdoor thermal pressure difference or photovoltaic power to exhaust, improve exhaust pressure difference and exhaust volume, and prevent natural wind backflow, for ventilation, heat dissipation and dehumidification of structures.

[0006] To achieve the above-mentioned purposes and solve the above-mentioned technical problems, the technical solution provided by the present application is:

[0007] The invention discloses an exhaust device, which comprises a vent pipe, a protective cover, a fairing, and a support body. The vent pipe is a vent pipe body with an upper port and a lower port. The protective cover is a cover body. The fairing comprises an outer fairing and N inner fairings, where N is a positive integer (N=1, 2, 3, …). The outer fairing and the N inner fairings are each a shell with an upper port and a lower port. The outer edge size of the N=1 inner fairing is smaller than the inner edge size of the outer fairing, and the upper port of the N=1 inner fairing is inserted into the lower port of the outer fairing. The outer edge size of the N=2 inner fairing is smaller than the inner edge size of the N=1 inner fairing, and the upper port of the N=2 inner fairing is inserted into the lower port of the N=1 inner fairing. The outer edge size of the N=3 inner fairing is smaller than the inner edge size of the N=2 inner fairing, and the upper port of the N=3 inner fairing is inserted into the lower port of the N=2 inner fairing. In this way, the outer fairing and the N=1 inner fairing, and each inner fairing are connected by the support body with a vent gap. The outer edge size of the vent pipe is smaller than the inner edge size of the Nth inner fairing, and the upper port of the vent pipe is inserted into the lower port of the Nth inner fairing. The Nth inner fairing and the vent pipe are connected by the support body with a vent gap. The protective cover is located on the upper port of the outer fairing. The space in the vent pipe and between the N inner fairings, the outer fairing, the protective cover, and the vent pipe forms an exhaust channel. The lower port of the vent pipe is an air inlet, and the space between the lower ports of the outer fairing and the N=1 inner fairing, and between the lower ports of each inner fairing is an air outlet.

[0008] The outer edge size refers to the outer edge size of each radial cross section of a part, and the inner edge size refers to the inner edge size of each radial cross section of a part. The edge profile of each radial cross section of a part is preferably circular, and can also be other shapes.

[0009] If the external airflow is horizontal laminar flow, if only one external fairing is provided, the gap between the inner edge of the lower end port of the external fairing and the outer wall of the exhaust pipe cannot be too large. If the gap is too large, the reverse flow is easy to occur for the upward tangential incoming airflow, and the wall attachment effect and jet action of the airflow are not obvious, which will affect the exhaust efficiency. When the gap is too small, the exhaust capacity will be reduced. The technical scheme, because the external fairing is provided, and N internal fairings are provided, the series and parallel operation of the fairings is realized, the windward area is expanded, the utilization of incoming wind is increased, the exhaust pressure difference is improved, and multiple air outlets are provided to increase the exhaust capacity. The series and parallel operation of the multiple fairings, the improvement of the exhaust pressure difference, and the increase of the exhaust capacity are due to the fact that the airflow in the structure expands and reduces pressure for the first time in the space volume between the upper end port of the ventilation pipe and the upper part of the Nth internal fairing, expands and reduces pressure for the second time in the space volume between the upper end port of the Nth internal fairing and the upper part of the N-1th (N-1) internal fairing, expands and reduces pressure for the third time in the space volume between the upper end port of the N-1th internal fairing and the upper part of the N-2th (N-2) internal fairing, and so on. The expansion and pressure reduction are performed again between the upper end port of the external fairing and the N=1th (N=1) internal fairing. At the same time, the incoming wind produces jet entrainment at the lower end ports of the internal fairings and the lower end port of the external fairing, and produces negative pressure and sweeping effect in a certain area on both sides of the outer wall of the ventilation pipe, so as to cooperatively improve the exhaust pressure difference and increase the exhaust capacity.

[0010] The protective cover is a cover body, which includes but is not limited to a plane, an arc surface, a hemispherical surface, etc. The material can be non-transparent material, transparent material or other functional material. In particular, when the protective cover adopts an arc or spherical transparent material, the fairing and the inner wall of the ventilation pipe are mirror surfaces, and the device also has light focusing and guiding effects.

[0011] The external fairing and the N internal fairings are streamline curved surfaces or rounded table surfaces, including but not limited to a reversed hemispherical table-shaped curved surface or a parabolic curved surface or an inclined surface, etc. According to the principles of fluid mechanics and aerodynamics, different shapes of objects have great influence on the wall attachment effect and separation degree of the boundary layer, the Reynolds coefficient and the resistance coefficient of the fluid flowing through the surface of the object. When the fluid flows through the surface of the streamline or rounded table or inclined surface, the boundary layer is not easy to separate, especially the external airflow flowing through the outside of each fairing will be subjected to the "ramjet" action of the later airflow, and the airflow is not easy to separate. When the boundary layer does not separate, the pressure difference resistance is reduced, the Reynolds coefficient is larger, and the resistance coefficient is smaller. The non-separation of the airflow and the reduction of the resistance can improve the utilization effect of the external wind.

[0012] The function of each fairing is: first, to convert one-dimensional laminar flow or two-dimensional flow of horizontal incoming flow into two-dimensional flow or three-dimensional flow, i.e. to generate axial flow component and horizontal flow component due to wall effect or Coanda effect. The downward axial flow component generates jet effect at the air outlet of each air outlet of the exhaust device, which can suck and sweep away the gas in the exhaust passage; at the same time, when the external airflow flows around the outer wall of the vent pipe, a negative pressure area is generated on both sides of the vent pipe at the lower part of the air outlet of the Nth fairing, which accelerates the exhaust of the gas in the structure. Second, the upper port of the vent pipe is inserted into the lower port of the Nth inner fairing, each fairing has shielding and guiding effect on the incoming downward airflow and horizontal airflow, and cooperates to prevent horizontal or downward airflow from entering the exhaust passage, thereby preventing backflow of the airflow.

[0013] When there is a temperature difference between the inside and outside of the structure, the chimney effect is generated under the action of thermal buoyancy, which can also exhaust the gas in the structure. The required fresh air in the structure enters from other passages of the structure.

[0014] The protective cover can prevent rain, snow, birds, debris and other objects from entering the vent pipe or have other functions.

[0015] The vent pipe is a pipe body with an upper port and a lower port, which can be open or closed, and a plurality of vent ports are formed on the side wall at the upper and lower ports.

[0016] The enhanced exhaust device can be assembled from individual parts, or partially integrated and assembled, or the entire device can be integrally formed. For example, when the protective cover is a spherical cap and the outer fairing is a reversed spherical platform, they can form an integrally formed spherical shell.

[0017] The working process of the device is: when the external horizontal or downward airflow blows towards the device, the airflow is guided by each fairing, and then flows through the lower port of each fairing and the outer wall of the vent pipe, generating negative pressure and suction effect; the gas in the structure enters the vent pipe through the air inlet of the vent pipe, and then passes through the upper port of the vent pipe, the exhaust passage between each fairing, the protective cover and the vent pipe, and performs the first expansion and pressure reduction between the upper part of the vent pipe and the Nth inner fairing, the second expansion and pressure reduction between the upper part of the Nth inner fairing and the N-1 (N-1) inner fairing, and so on. Ultimately, the gas in the exhaust passage is swept to the external space from the air outlet of the lower port of each fairing by the external airflow. At the same time, each fairing shields the incoming airflow and prevents the incoming airflow from entering the exhaust passage. When there is no wind outside and hot air in the structure, the hot air will generate buoyancy, the hot air will rise in the vent pipe and be expanded and reduced in pressure after passing through the exhaust passage, and then be discharged to the external space. The size of the buoyancy follows the element relationship of the gas equation.

[0018] The preferred technical scheme of the enhanced exhaust device is that a wind baffle is arranged on the outer wall of the air pipe below the lower port of the Nth inner fairing, the outer edge size of the wind baffle is 60% or more of the outer edge size of the lower port of the Nth inner fairing, the vertical distance from the upper surface of the wind baffle to the section of the lower port of the Nth inner fairing is 10% to 130% of the outer edge size of the lower port of the Nth inner fairing, and the axial distance between the upper port of the air pipe and the lower port of the Nth inner fairing is greater than 5 mm. When encountering upward vertical flow or upward tangential flow or upward vortex flow, the wind baffle plays a role in preventing the upward flow of the air flow and preventing the phenomenon of backflow of the air flow. At the same time, part of the air flow, especially the vortex air flow, will flow around the periphery of the wind baffle, generating a negative pressure area at each air outlet to suck the gas in the air pipe. The shape of the wind baffle can be a flat plate or a ring-shaped disc.

[0019] The enhanced exhaust device can be provided with a gas switch valve in the exhaust channel. According to different working conditions and structural needs, the gas switch valve can be a manual valve, an electric valve, a pneumatic valve or a hydraulic valve, a butterfly valve, a rotary vane valve or a swing valve. It can be a common gas switch valve or a heat-insulating fireproof gas switch valve.

[0020] The enhanced exhaust device can be provided with an electric exhaust fan in the exhaust channel. The electric exhaust fan can be an outer rotor fan or an inner rotor fan. The exhaust fan can be installed in the air pipe or between the fairing and the air pipe. The driving motor can be installed in the air duct or on the upper surface of the protective cover. According to the nature of the power supply, the driving motor can be an alternating current motor or a direct current motor.

[0021] The enhanced exhaust device can be provided with an electric exhaust fan in the exhaust channel. The electric exhaust fan can be an outer rotor fan or an inner rotor fan. The exhaust fan can be installed in the air pipe or between the fairing and the air pipe. The driving motor can be installed in the air duct or on the upper surface of the protective cover. According to the nature of the power supply, the driving motor can be an alternating current motor or a direct current motor.

[0022] The enhanced exhaust device can be provided with a protective net in the exhaust channel. The protective net prevents small objects such as insects from entering the structure.

[0023] The enhanced exhaust device can be provided with a protective net in the exhaust channel. The protective net prevents small objects such as insects from entering the structure.

[0024] Any one of the above enhanced exhaust devices, the optional technical solutions are: the cover body of the protective cover is a photovoltaic panel, the power output by the photovoltaic panel is directly connected with the motor of the electric exhaust fan, the LED lamp, and the photovoltaic panel has a maximum power less than or equal to the rated power of the motor and the LED, so as to ensure that the motor and the LED lamp are not burned out.

[0025] Any one of the above enhanced exhaust devices, the optional technical solutions are: the cover body of the protective cover is a photovoltaic panel, the photovoltaic panel is provided with a light collecting protective cover. The light collecting protective cover has the functions of light collecting and preventing bird droppings and sundries from directly covering the photovoltaic panel and causing local short circuit of the photovoltaic panel.

[0026] Any one of the above enhanced exhaust devices, the optional technical solutions are: a flexible photovoltaic film is attached to the outer surface of the outer flow guide cover and each inner flow guide cover, the power output by the photovoltaic film is directly connected with the motor of the electric exhaust fan, the LED lamp, and the photovoltaic film has a maximum power less than or equal to the rated power of the motor and the LED, so as to ensure that the motor and the LED lamp are not burned out.

[0027] Any one of the above enhanced exhaust devices, the optional technical solutions are: an annular air amplifier or an ion fan air inlet head is arranged in the exhaust channel, the air outlet of the annular air amplifier or the ion fan air inlet head is directed to the exhaust direction, and the air inlet of the air amplifier is connected to a compressed air source or the ion fan air inlet head is connected to a high-voltage power supply. The air amplifier is also called an air multiplier or an air inducer. According to the Coanda effect principle, the high-speed gas sprayed by the air amplifier can drive the surrounding air to flow and exhaust. The air amplifier is a single-wing or double-wing air inducer or an annular air inducer composed of multiple nozzles. The ion fan is a high-voltage electric field generated between two electrode plates by a high-voltage power supply, and the ion movement in the high-voltage electric field generates ion wind, which can drive the surrounding air to flow and exhaust. The air amplifier and the ion fan air inlet head have the same effect.

[0028] Any one of the above enhanced exhaust devices, the improved technical solutions are: a flow guide is arranged on the central axis between the bottom of the protective cover and the upper port of the air vent, the flow guide is a reverse cone or a reverse arc body, and the upper part of the reverse cone or the reverse arc body is fixedly connected with the bottom of the protective cover. The flow guide has the functions of flow guiding and flow guiding, and can reduce air resistance.

[0029] Any one of the above enhanced exhaust device, the improved technical solution is: the upper surface of the protective cover is provided with a motor, the rotating shaft of the motor passes through the protective cover and is connected with the fan in the exhaust passage, the upper end cover of the motor is provided with a rain cover, and the lower end cover of the motor is provided with a heat insulation pad between the protective cover. This technical solution can be used for discharging high-temperature gas.

[0030] Any one of the above enhanced exhaust device, the improved technical solution is: the upper end of the vent pipe is an outwardly curled and expanded pipe port. This structure is beneficial to the expansion and pressure reduction of the discharged gas, reduces the air flow resistance and improves the exhaust efficiency.

[0031] The above-mentioned enhanced exhaust device, the optional technical solution is: the cover body of the protective cover is a photovoltaic power generation panel, the photovoltaic power generation panel is provided with a light condensing protective cover, the outer surface of each flow guide cover is attached with a flexible photovoltaic power generation film, and the power output by the photovoltaic power generation panel and the flexible photovoltaic power generation film is directly connected with the controller and motor of the electric exhaust fan, LED lamp or through a solar charging and discharging controller (MPPT or PWM), a storage battery. The light condensing protective cover has the functions of light condensing and preventing bird droppings and sundries from directly covering the photovoltaic power generation panel, causing local short circuit of the photovoltaic power generation panel. The maximum power of the photovoltaic power generation panel and the photovoltaic power generation film should be less than or equal to the rated power of the motor and LED, so as to ensure that the motor and LED lamp are not burned out.

[0032] The above-mentioned enhanced exhaust device, the optional technical solution is: a thunderbolt needle or a mascot is installed on the top of the protective cover.

[0033] Any one of the above enhanced exhaust device, the improved technical solution is: the outer flow guide cover and the inner flow guide cover are streamline curved surfaces or rounded table surfaces, the surface of the streamline curved surface shell can be a smooth surface or a coated various patterns.

[0034] Beneficial effects: (1) In terms of structural performance, the enhanced exhaust device can achieve the use of natural wind power, thermal power, photovoltaic power exhaust, and save city power. When the enhanced exhaust device is a pure wind power, thermal power mode (i.e. without motor and fan), there is no rotating part, no wind direction tracking device is needed, and it can adapt to high wind speed load; low noise, no rain and snow leakage, birds cannot nest, no maintenance, long service life and other purposes can be achieved. (2) In terms of exhaust performance, for example: the enhanced exhaust device is provided with an outer guide cover, N=1 inner guide cover and two air outlets, the exhaust pressure difference is high, and the exhaust capacity is large; the starting wind speed is extremely low, through physical testing, the inner diameter of the ventilation pipe of the enhanced exhaust device is 160mm, and the inner diameter of the ventilation pipe of the market spherical rotating "unpowered fan" is 160mm. The "unpowered fan" can start exhaust at an external wind speed of 1m / s, while the enhanced exhaust device can measure exhaust at a wind speed of 0.25m / s, and the exhaust speed reaches 0.1m / s. The exhaust capacity of the enhanced exhaust device in the 0.25m / s~35m / s wind speed range is about 1.6 times that of the "unpowered fan". (3) In terms of anti-backflow, when the enhanced exhaust device has a wind shield, it will not cause air flow backflow to any direction of external air flow.

[0035] The application will be further described below in conjunction with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a structural principle schematic diagram of an enhanced exhaust device of the present application. Figure 1 Figure 1 is a structural principle schematic diagram of an enhanced exhaust device of the present application.

[0037] Figure 1 Figure 1 is a structural principle schematic diagram of an enhanced exhaust device of the present application.

[0038] The solid line with arrow represents the external flow line; the single dotted line with arrow represents the gas flow line in the structure; and the double dotted line with arrow is the external tangential or vortex flow.

[0039] Figure 2 is a structural principle schematic diagram of an enhanced exhaust device with a photovoltaic panel of the present application. Figure 2 Figure 2 is a structural principle schematic diagram of an enhanced exhaust device with a photovoltaic panel of the present application.

[0040] Figure 2 Figure 2 is a structural principle schematic diagram of an enhanced exhaust device with a photovoltaic panel of the present application.

[0041] Solid lines with arrows represent external flow streamlines; single-dotted lines with arrows represent gas streamlines within a structure; double-dotted lines with arrows represent external tangential or vortex flow; and dashed lines with arrows represent light rays. Detailed Implementation

[0042] The present invention will be further described below with reference to specific embodiments. The following embodiments are intended to illustrate the present invention, but not to further limit the present invention.

[0043] Example 1:

[0044] like Figure 1 An enhanced exhaust device with N=1 inner guide shrouds is shown, comprising a vent pipe 1, a protective cover 2, an outer guide shroud 4a, a first support 3a, an inner guide shroud 4b, and a second support 3b. The vent pipe 1 is a circular vent pipe with an upper port and a lower port. The protective cover 2 is an arc-shaped cover. The outer guide shroud 4a and the inner guide shroud 4b are shells with inverted frustum surfaces, each with an upper port and a lower port. The inner diameter of the lower port of the inner guide shroud 4b is 1.5 times the outer diameter of the vent pipe 1, and the inner diameter of the upper port of the inner guide shroud 4b is 2 times the outer diameter of the vent pipe 1. The inner diameter of the lower port of the outer guide shroud 4a is 2.5 times the outer diameter of the vent pipe 1, and the inner diameter of the upper port of the outer guide shroud 4a is 3 times the outer diameter of the vent pipe 1. The distance between the upper port of the inner guide shroud 4b and the lower port of the outer guide shroud 4a is one-third of the outer diameter of the vent pipe 1. The upper port of the vent pipe 1 is inserted into the lower port of the inner guide shroud 4b. The distance inside is one-third of the outer diameter of the vent pipe 1. The outer diameter of the protective cover 2 is slightly larger than the outer diameter of the upper port of the outer guide shroud 4a. The protective cover 2 is fixed to the upper port of the outer guide shroud 4a. The vent pipe 1 and the inner guide shroud 4b are connected by the second support 3b, and the outer guide shroud 4a and the inner guide shroud 4b are connected by the first support 3a. The space inside the vent pipe 1 and between the vent pipe 1 and the inner guide shroud 4b, the protective cover 2, and the outer guide shroud 4a forms an exhaust channel. The lower port of the vent pipe 1 is the air inlet, the space between the lower ports of the inner guide shroud 4b and the outer guide shroud 4a is the first air outlet, and the space between the outer wall of the vent pipe 1 and the lower port of the inner guide shroud 4b is the second air outlet. A baffle plate 6 is provided on the outer wall of the vent pipe 1 at the lower part of the lower port of the inner guide shroud 4b. The outer diameter of the baffle plate 6 is equal to the outer diameter of the lower port of the outer guide shroud 4a. The vertical distance from the upper surface of the baffle plate 6 to the cross-section of the lower port of the inner guide shroud 4b is equal to 80% of the outer diameter of the lower port of the inner guide shroud 4b. The lower part of the vent pipe 1 is fixedly sealed on the mounting base 7 of the exhaust pipe 1. The mounting base 7 is sealed and fixed on the structure 5.

[0045] The upper port of the ventilation pipe 1 is inserted into the lower port of the inner fairing 4b, and the upper port of the inner fairing 4b is inserted into the lower port of the outer fairing 4a. The two fairings 4a and 4b shield and guide the external downward cutting airflow and horizontal airflow, and cooperate with the ventilation pipe 1 to prevent the horizontal or downward cutting airflow from entering the exhaust passage, thereby preventing the airflow from backflowing.

[0046] The wind deflector 6 prevents the airflow from rising when encountering upward vertical flow or upward tangential flow or upward vortex flow, thereby preventing the airflow from backflowing. Meanwhile, part of the airflow flows around the periphery of the wind deflector 6 to generate a negative pressure area at the air outlet, thereby sucking the gas in the ventilation pipe 1.

[0047] The protective cover 2 prevents rain, snow, birds, and sundries from entering the ventilation pipe.

[0048] The outer fairing 4a and the inner fairing 4b convert the one-dimensional laminar flow or two-dimensional flow of the horizontal incoming flow into two-dimensional flow or three-dimensional flow, i.e., generate an axial flow component and a horizontal flow component. The downward axial flow component generates a jet effect at the first air outlet and the second air outlet of the exhaust device, thereby sucking and sweeping the gas in the exhaust passage. Meanwhile, the external airflow flows around the outer wall of the ventilation pipe 1 to generate a negative pressure area at the lower part of the ventilation pipe 1 on both sides of the second air outlet, thereby accelerating the exhaust and sweeping away the gas in the exhaust passage.

[0049] When there is a temperature difference between the inside and outside of the structure 5, the chimney effect is generated under the action of thermal buoyancy, which can also exhaust the gas in the structure 5. The required fresh air in the structure 5 enters from other passages of the structure 5.

[0050] The working process of the device is: when the external horizontal or downward wind blows to the device, the external wind flows through the outer guide cover 4a and the inner guide cover 4b, and when the external wind flows through the lower port of the outer guide cover 4a and the inner guide cover 4b and the outer wall of the ventilation pipe 1, negative pressure and suction effect are generated. At the same time, the gas in the structure 5 enters the ventilation pipe 1 through the air inlet of the ventilation pipe 1, and then expands and depressurizes through the upper port of the ventilation pipe 1, the outer guide cover 4a, the inner guide cover 4b, the exhaust passage between the protective cover 2 and the ventilation pipe 1, and finally is swept to the external space by the external wind from the lower port of the outer guide cover 4a and the inner guide cover 4b. At the same time, the guide cover 4a and the inner guide cover 4b shield the wind and prevent the wind from entering the ventilation pipe 1. When the external wind is upward or upward vortex, the wind will be blocked by the baffle 6, and part of the wind will flow around the periphery of the baffle 6. On the one hand, the baffle 6 prevents the airflow from directly entering the air outlet to generate backflow, and on the other hand, the airflow flowing around the periphery of the baffle 6 will generate a negative pressure area at the air outlet, which will suck the gas in the exhaust passage. When there is no wind outside and hot air inside the room, the hot air will generate buoyancy, the hot air will rise in the ventilation pipe 1 and be discharged to the external space through the exhaust passage.

[0051] Example 2:

[0052] As Figure 2 shown in the inner guide cover N=1, with a photovoltaic panel, an enhanced exhaust device, including a ventilation pipe 1, a protective cover (photovoltaic panel) 2, a first support body 3a, an outer guide cover 4a, a second support body 3b, an inner guide cover 4b, a baffle 6, a DC motor 8, a fan 9, and a motor bracket 10.

[0053] Ventilation pipe 1 is a circular ventilation pipe body with upper and lower ports, protective cover 2 is a photovoltaic power generation panel, outer fairing 4a and inner fairing 4b are respectively a shell with an upper port and a lower port, the inner diameter of the lower port of inner fairing 4b is 1.3 times the outer diameter of ventilation pipe 1, the inner diameter of the upper port of inner fairing 4b is 1.8 times the outer diameter of ventilation pipe 1, the inner diameter of the lower port of outer fairing 4a is 2.3 times the outer diameter of ventilation pipe 1, the inner diameter of the upper port of outer fairing 4a is 2.8 times the outer diameter of ventilation pipe 1, the vertical distance between the upper port of inner fairing 4b inserted into the lower port of outer fairing 4a is one third of the outer diameter of ventilation pipe 1, the vertical distance between the upper port of ventilation pipe 1 inserted into the lower port of inner fairing 4b is one third of the outer diameter of ventilation pipe 1, the outer diameter of photovoltaic panel 2 is greater than the outer diameter of the upper port of outer fairing 4a, and photovoltaic panel 2 is fixed to the upper port of outer fairing 4a; ventilation pipe 1 and inner fairing 4b are connected by second support 3b, and outer fairing 4a and inner fairing 4b are connected by first support 3a; the space in ventilation pipe 1 and between ventilation pipe 1 and inner fairing 4b, photovoltaic panel 2 and outer fairing 4a forms an exhaust channel, the lower port of ventilation pipe 1 is an air inlet, the space between inner fairing 4b and the lower port of outer fairing 4a is a first air outlet, and the space between the outer wall of ventilation pipe 1 and the lower port of inner fairing 4b is a second air outlet. A wind deflector 6 is provided on the outer wall of ventilation pipe 1 at the lower part of the lower port of inner fairing 4b, the outer diameter of wind deflector 6 is greater than the diameter of the lower port of outer fairing 4a, and the vertical distance from the upper surface of wind deflector 6 to the cross section of the lower port of inner fairing 4b is equal to 70% of the outer diameter of the lower port of inner fairing 4b. A DC motor 8 is fixed on the upper port of ventilation pipe 1 by a motor support 10, a fan 9 is located in the upper port of ventilation pipe 1, the shaft of DC motor 8 is connected with fan 9, and DC motor 8 is directly connected with the power output terminal of photovoltaic panel 2 or DC motor 8 is connected with the power output terminal of photovoltaic panel 2 through a solar charging and discharging controller and a storage battery (not shown in the figure). The lower part of ventilation pipe 1 is fixed and sealed on an exhaust pipe 1 mounting base 7, and the mounting base 7 is fixed and sealed on a structure 5.

[0054] In the working process of example 2, in addition to the same as example 1, the gas in the structure 5 is discharged under the action of external wind and thermal pressure difference, and when there is light, the external light shines on the photovoltaic panel 2 to generate electricity and drive the DC motor 8 and the fan 9 to rotate to enhance the exhaust, and the electricity generated by the photovoltaic panel 2 can also be connected to the DC motor 8 through the solar charging and discharging controller (MPPT or PWM) and the storage battery (not shown in the figure). The functions and working processes of other components in example 2 are basically the same as those in example 1, and will not be repeated here.

[0055] While the application has been described in connection with specific embodiments thereof, it will be understood that it is carried out in various alternatives, combinations of features, and permutations of elements different from those described and shown herein, and that it is intended to cover in the appended claims all such alternatives, combinations and permutations of equivalents and aspects falling within the scope of the application.

Claims

1. An enhanced exhaust device comprising a vent tube, a protective cover, a deflector, a support body, the vent tube being a tube body having an upper port and a lower port, the protective cover being a cover body, the device being characterized in that: The fairing comprises an outer fairing, N inner fairings, the N being a positive integer, the outer fairing and the N inner fairings each being a shell with an upper port and a lower port, the outer edge size of the N=1 inner fairing being smaller than the inner edge size of the outer fairing, and the upper port of the N=1 inner fairing being inserted into the lower port of the outer fairing, the outer edge size of the N=2 inner fairing being smaller than the inner edge size of the N=1 inner fairing, and the upper port of the N=2 inner fairing being inserted into the lower port of the N=1 inner fairing, the outer edge size of the N=3 inner fairing being smaller than the inner edge size of the N=2 inner fairing, and the upper port of the N=3 inner fairing being inserted into the lower port of the N=2 inner fairing, and so on, the outer fairing and the N=1 inner fairing and each inner fairing being connected by a support body with a ventilation gap therebetween; the outer edge size of the ventilation pipe being smaller than the inner edge size of the Nth inner fairing, the upper port of the ventilation pipe being inserted into the lower port of the Nth inner fairing, the Nth inner fairing and the ventilation pipe being connected by a support body with a ventilation gap therebetween, the protective cover being located on the upper port of the outer fairing; the space in the ventilation pipe and between the N inner fairings, the outer fairing, the protective cover and the ventilation pipe forming an exhaust passage, the lower port of the ventilation pipe being an air inlet, and the space between the lower ports of the outer fairing and the N=1 inner fairing and between the lower ports of each inner fairing being an air outlet.

2. An exhaust enhancement device according to claim 1, wherein: A wind deflector is arranged on the outer wall of the ventilation pipe below the lower port of the Nth inner fairing, the outer edge size of the wind deflector being 60% or more of the outer edge size of the lower port of the Nth inner fairing, the vertical distance from the upper surface of the wind deflector to the section of the lower port of the Nth inner fairing being 10% to 130% of the outer edge size of the lower port of the Nth inner fairing, and the axial distance between the upper port of the ventilation pipe and the lower port of the Nth inner fairing being greater than 5 mm.

3. An exhaust enhancer according to claim 1, wherein: A gas switch valve is installed in the exhaust passage.

4. A device according to claim 1 or 2 or 3, wherein: An electric exhaust fan is installed in the exhaust passage.

5. A device according to claim 1 or 2 or 3, wherein: A protective net is installed in the exhaust passage.

6. An exhaust enhancer according to claim 4, wherein: The cover body of the protective cover is a photovoltaic power generation panel, and the power output by the photovoltaic power generation panel is directly connected with the motor of the electric exhaust fan or connected with the motor through a solar charging and discharging controller and a storage battery.

7. A device according to claim 1 or 2 or 3, wherein: An annular air amplifier or an ion fan air inlet head is arranged in the exhaust passage, the air outlet of the annular air amplifier or the ion fan air inlet head is directed towards the exhaust direction, and the air inlet of the air amplifier is connected to a compressed air source through a pipeline or the ion fan air inlet head is connected to a high-voltage power supply.

8. An exhaust enhancer according to claim 4, wherein: A flow guide is arranged on the central axis between the bottom of the protective cover and the upper port of the ventilation port, the flow guide being a rounded cone or an arc-shaped body, and the upper part of the rounded cone or the arc-shaped body is fixedly connected with the bottom of the protective cover.

9. A device according to claim 1 or 2 or 3, wherein: An electric motor is installed on the upper surface of the protective cover, the rotating shaft of the electric motor penetrates the protective cover and is connected with a fan in the exhaust passage, a rain cover is arranged on the upper end cover of the electric motor, and a heat insulation pad is arranged between the lower end cover of the electric motor and the protective cover.

10. An exhaust enhancer according to claim 6, wherein: The upper surface of the photovoltaic power generation panel is provided with a light protection cover.

Images