A new air outlet device with typhoon protection function

Abstract

The present invention discloses a new air outlet device with typhoon protection function. The new air outlet device comprises a cylindrical box, a rotating pressure reducing mechanism and a damping mechanism, and the rotating pressure reducing mechanism comprises a power plate, a pressure reducing orifice plate and a rotating mechanism. An arc-shaped airflow passage is formed between the air inlet pipe and the air outlet pipe on the box; the rotating pressure reducing mechanism and the damping mechanism are fixedly connected and rotated as a whole, and the power plate in the airflow passage is driven by the wind pressure to drive the rotating mechanism to rotate; the pressure reducing orifice plate is provided with a vent hole that allows a small part of the airflow to pass through, and under the driving effect of the wind pressure on the power plate and the damping effect of the damping mechanism, the pressure reducing orifice plate can be rotated into the airflow passage, and can be positioned at different working positions in the airflow passage to change the flow area of ​​the airflow passage, so as to achieve the effect of reducing the pressure of the airflow, and the greater the wind pressure of the incoming air, the greater the pressure reduction amount. The device can not only work normally at normal wind speed, but also reduce wind pressure and remove rainwater during typhoons, so it has the function of preventing typhoons.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioning and ventilation, and in particular to a new air outlet device with a typhoon protection function. Background Art

[0002] Building air conditioning and ventilation systems usually require fresh air vents to be set up on the exterior walls of buildings to introduce fresh air to meet the needs of people breathing or process in the building. The air inlet speed of the building's fresh air vents is usually less than 8 m / s.

[0003] Typhoons often hit coastal areas, bringing strong winds and heavy rains. For example, Typhoon Rammasun, which landed in Wenchang, Hainan on July 18, 2014, had a maximum wind speed of 60m / s.

[0004] Typhoons can have an adverse effect on the fresh air vents on the exterior walls of buildings. Strong winds blowing directly at the fresh air vents will generate strong wind pressure, which can cause excessive air volume at the fresh air vents, affecting the performance of the air conditioning or ventilation system, or even damage the pipes and equipment of the air conditioning or ventilation system. In addition, typhoons usually bring heavy rains, and strong winds and heavy rains can enter the air conditioning or ventilation system from the fresh air vents, posing a safety hazard.

[0005] Therefore, typhoon protection of fresh air vents is an important technical problem that needs to be urgently solved in the air conditioning and ventilation systems of buildings, offshore structures and ships in coastal areas. The focus needs to be on how to reduce wind pressure and drain rainwater when strong winds hit the fresh air vents head-on, and to improve the safety and aesthetics of the fresh air vents. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide a fresh air outlet device with typhoon protection function (hereinafter referred to as fresh air outlet device), which can not only work normally at low wind speed, but also can automatically reduce pressure and stabilize pressure according to the wind pressure of the incoming air and remove rainwater in the incoming air during typhoons, so it has typhoon protection function of wind and rain protection.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A fresh air inlet device with typhoon protection function comprises a cylindrical box, a rotating decompression mechanism arranged in the box, and a damping mechanism arranged outside the box, wherein:

[0009] The box body is provided with a horizontally arranged air inlet pipe and an air outlet pipe with an outlet arranged vertically upward.

[0010] The rotary pressure reducing mechanism comprises a pressure reducing orifice plate, a power plate, a partition plate, a rotating shaft and a bearing. The rotating shaft is rotatably arranged on the central axis of the box body. The pressure reducing orifice plate, the power plate and the partition plate are all fixedly arranged on the rotating shaft and maintain a preset angle, and can rotate integrally around the rotating shaft; the pressure reducing orifice plate is provided with some ventilation holes that allow a small part of the airflow to pass through; the power plate is provided with flow holes that allow most of the airflow to pass through and a wind pressure sensing panel for sensing wind pressure, thereby providing positive rotational power for the rotary pressure reducing mechanism.

[0011] The damping mechanism includes a reaction rod, a counterweight and a limit stopper, one end of the reaction rod is fixedly connected to the rotating shaft, and the other end is fixedly connected to the counterweight; the reaction rod is located on the outside of the box body and is between the angles of the pressure reducing orifice plate and the power plate; the reaction rod is in an initial equilibrium position basically vertically downward in a windless state; when in a strong wind state, the rotary pressure reducing mechanism generates a forward rotation under the action of wind pressure, driving the reaction rod to rotate away from the initial equilibrium position vertically downward, and the counterweight generates a reverse rotation torque on the reaction rod under the action of gravity, which is used to provide reverse rotation resistance for the rotary pressure reducing mechanism.

[0012] In the above-mentioned fresh air inlet device, the two sides of the air inlet pipe and the air outlet pipe divide the box into a first arc-shaped wall and a second arc-shaped wall;

[0013] The two ends of the first arc-shaped wall are respectively fixedly connected to the air inlet pipe and the air outlet pipe, and the curvature of the first arc-shaped wall is equal to the angle between the partition plate and the pressure reducing orifice plate;

[0014] The upper end of the second arc-shaped wall is fixedly connected to the air outlet pipe, and the lower end is the tangent line where the lower side panel of the indoor port of the wall-penetrating pipe of the air inlet pipe is tangent to the bottom of the cylindrical box body;

[0015] The partition plate is a closed panel, which is located in the fan-shaped area formed by the first arc-shaped wall of the box body, so that the incoming air flows along the arc-shaped airflow channel formed by the second arc-shaped wall of the box body.

[0016] Optionally, in the above-mentioned fresh air inlet device, the pressure reducing orifice plate is provided with a number of evenly arranged vent holes, and the total opening area of ​​these vent holes is 25% to 30% of the total area of ​​the pressure reducing orifice plate.

[0017] Optionally, in the above-mentioned fresh air inlet device, the power plate is a U-shaped frame structure, the U-shaped bottom end of the U-shaped frame structure is the wind pressure sensing panel, the two sides of the U-shaped opening of the U-shaped frame structure are connecting ends for connecting to the rotating shaft, and the U-shaped cavity of the U-shaped frame structure is the flow hole.

[0018] Optionally, in the above-mentioned fresh air inlet device, the connecting end of the power plate, the connecting end of the pressure reducing orifice plate, the connecting end of the partition plate and the reaction rod are all sleeved on the rotating shaft through a sleeve structure, and the sleeve structure is fixedly connected to the rotating shaft through a pin.

[0019] Optionally, in the above-mentioned fresh air inlet device, a limit stop is provided on the outer side of the box body at the rotation limit position of the reaction rod.

[0020] Optionally, the counterweight is fixed to the end of the reaction rod by bolts, and its mass is adjustable.

[0021] Optionally, in the above-mentioned fresh air inlet device, a rainproof shutter is provided on the outdoor side of the air inlet duct.

[0022] Optionally, in the above-mentioned fresh air inlet device, the cross-sectional area of ​​the connecting pipe of the air inlet pipe located on the indoor side gradually increases along the air intake direction.

[0023] Optionally, in the above-mentioned fresh air inlet device, the bottom surface of the connecting pipe of the air inlet pipe located on the indoor side is provided with a slope that gradually rises along the air intake direction.

[0024] It can be seen from the above technical scheme that in the fresh air inlet device with typhoon protection function provided by the present invention, the wind pressure of the incoming air acts on the wind pressure sensing panel of the power plate, so that the rotating decompression mechanism generates positive rotational power, so that the pressure reducing orifice plate is rotatably arranged in the air flow passage, and at the same time, the damping mechanism deviates from the equilibrium position to generate reverse resistance. As a result of the joint action of these two opposite rotational forces, the pressure reducing orifice plate is dynamically balanced at a certain position in the flow channel. The greater the wind pressure of the incoming air, the more flow channels the pressure reducing orifice plate enters, and the greater its throttling and decompression effect. Therefore, the fresh air inlet device has the function of automatically adjusting the pressure reduction according to the incoming air pressure. The greater the incoming air pressure, the greater the pressure reduction amount, so that the wind pressure and air volume at the air outlet are basically stable. The fresh air inlet device can not only work normally at normal wind speed, but also, during typhoons, can automatically reduce and stabilize the pressure of the intake air flow to reduce the fluctuations in wind pressure and air flow caused by strong winds or typhoons, and remove rainwater entrained in the air flow through the centrifugal dehydration effect of the air flow flowing in the arc-shaped flow channel, the expansion of the flow channel, the change of the air flow direction and the technical measures of setting rainproof shutters at the air inlet, so that the fresh air inlet device has the functions of windproof, rainproof and typhoon-proof, thereby ensuring the normal operation and safety of the indoor air conditioning or ventilation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A vertical view of a fresh air vent device with typhoon protection function provided by a specific embodiment of the present invention when there is no wind or a slight breeze outdoors;

[0027] Figure 2 A vertical view of a fresh air outlet device with typhoon protection function provided by a specific embodiment of the present invention in a strong wind state outdoors;

[0028] Figure 3 for Figure 1 Sectional view of the AA section;

[0029] Figure 4 for Figure 3 Cross-sectional view of the middle BB section (outdoors with no wind or light wind);

[0030] Figure 5 for Figure 1 Sectional view of the CC section;

[0031] Figure 6 for Figure 1 Sectional view of the middle DD section;

[0032] Figure 7 for Figure 2 The detailed cross-sectional drawing of the EE section.

[0033] Wherein: 1-box, 11-first arc-shaped wall, 12-second arc-shaped wall;

[0034] 2-air inlet pipe, 21-wall pipe, 22-connecting pipe;

[0035] 3-Air outlet pipe;

[0036] 4- Rotary decompression mechanism;

[0037] 41-bearing, 42-rotating shaft, 43-partition plate,

[0038] 44-pressure relief orifice plate, 440-ventilation hole,

[0039] 45-power plate, 450-flow hole, 451-wind pressure sensing panel;

[0040] 5- Damping mechanism;

[0041] 51-reaction rod, 52-counterweight, 53-limit stopper;

[0042] 6-Rainproof shutters. DETAILED DESCRIPTION

[0043] A specific embodiment of the present invention provides a fresh air inlet device with typhoon protection function (referred to as the fresh air inlet device for short). The fresh air inlet device can not only work normally at low wind speeds, but also automatically reduce pressure and stabilize pressure according to the wind pressure of the incoming air and remove rainwater from the incoming air during typhoons, thus having typhoon protection functions of preventing wind and rain.

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] A fresh air vent device with typhoon protection function provided in a specific embodiment of the present invention comprises a cylindrical box body 1, a horizontally arranged air inlet pipe 2 and an air outlet pipe 3 arranged vertically upward on the box body 1, a rotating pressure reducing mechanism 4 arranged inside the box body 1, a damping mechanism 5 arranged outside the box body 1 and a rainproof shutter 6 arranged at the air inlet.

[0046] In the above-mentioned fresh air inlet device, the air inlet pipe 2 and the air outlet pipe 3 divide the box into a first arc-shaped wall 11 and a second arc-shaped wall 12. Figure 1 As shown in: the two ends of the first arc-shaped wall 11 are respectively connected to the air inlet pipe 2 and the air outlet pipe 3, and are located on one side of the air inlet pipe 2 and the air outlet pipe 3; the two ends of the second arc-shaped wall 12 are respectively connected to the air inlet pipe 2 and the air outlet pipe 3, and are located on the other side of the air inlet pipe 2 and the air outlet pipe 3;

[0047] The two ends of the first arc-shaped wall 11 are respectively fixedly connected to the air inlet pipe 2 and the air outlet pipe 3, and the curvature of the first arc-shaped wall 11 is equal to the angle between the partition plate and the pressure reducing orifice plate;

[0048] The upper end of the second arc-shaped wall 12 is fixedly connected to the air outlet pipe 3, and the lower end is the tangent line where the lower side panel of the indoor port of the air inlet pipe 21 is tangent to the bottom of the cylindrical box body;

[0049] The air inlet pipe, the second arc-shaped wall 12 and the air outlet pipe form an air flow passage with an arc-shaped middle portion, and rotate the flow direction of the air flow counterclockwise by 90°.

[0050] The rotary pressure reducing mechanism 4 is arranged in the box body 1, and specifically includes a pressure reducing orifice plate 44, a power plate 45, a partition plate 43, a rotating shaft 42 and a bearing 41. Among them, the rotating shaft 42 is rotatably arranged on the central axis of the box body 1, and the pressure reducing orifice plate 44, the power plate 45, and the partition plate 43 are all arranged on the rotating shaft 42, and maintain a preset angle; the pressure reducing orifice plate 44 is provided with some vents 440 that allow a small part of the airflow to pass through; the power plate 45 is provided with a flow hole 450 that allows most of the airflow to pass through and a wind pressure sensing panel 451 for sensing wind pressure. The center line of the rotating shaft 42 coincides with the center axis of the cylindrical side wall of the cylindrical box body 1.

[0051] The partition plate 43 is a closed panel, which is located in the fan-shaped area formed by the first arc-shaped wall 11 of the box body 1, so that the incoming air flows along the air inlet pipe 2, the arc-shaped air flow channel formed by the second arc-shaped wall 12 and the air outlet pipe 3.

[0052] The air inlet pipe 2 includes a wall-penetrating pipe 21 and a connecting pipe 22. The wall-penetrating pipe 21 is a rectangular straight pipe section with equal cross-sectional area, which passes through the outer wall and is used to introduce the incoming air from the outdoor side to the indoor side. One side of the connecting pipe 22 is connected to the wall-penetrating pipe 21, and the other side is connected to the lower part of the box body 1, which is used to introduce the incoming air into the cylindrical box body 1.

[0053] The air outlet pipe 3 is located at the upper part of the indoor box body 1, and is used to transport the fresh air sent out by the fresh air outlet device to indoor devices (such as air conditioning devices, air handling devices, ventilation devices).

[0054] During use, the power plate 45 is a sensor for the wind speed and wind pressure of the incoming air:

[0055] See also Figure 1 When the wind pressure in the air inlet pipe 2 is relatively small, that is, under normal wind speed (no wind or light wind), the reaction rod 51 is located at an initial equilibrium position substantially vertically downward, and the pressure reducing orifice plate 44 is located at an initial position at the lower part of the first arc wall of the box body 1. At this time, the pressure reducing orifice plate 44 is not in the flow channel and does not affect the air intake. The flow area of ​​the air flow passage is the maximum flow area. The airflow enters the arc-shaped channel of the second arc wall of the box body 1 through the air inlet pipe 2, flows through the flow hole 450 on the power plate 45, and flows out from the air outlet pipe 3. The pressure reducing orifice plate does not play a pressure reducing role.

[0056] See also Figure 2When the wind pressure entering the air inlet pipe 2 is relatively high, that is, during strong winds or even typhoons, the wind pressure sensing panel 451 of the power plate 45 rotates forward under the wind pressure of the high-speed airflow, and rotates forward with the entire rotating pressure reducing mechanism 4, thereby driving the pressure reducing orifice plate 44 to rotate into the circular arc-shaped airflow passage, reducing the flow area of ​​the airflow passage, thereby blocking part of the airflow and playing a role in throttling and reducing pressure. At this time, the greater the wind pressure of the incoming air, the greater the rotation angle of the pressure reducing orifice plate 44 entering the circular arc-shaped airflow passage, the smaller the flow area of ​​the circular arc-shaped airflow passage, and the greater the pressure reducing effect on the incoming air. It should be noted that the position of the pressure reducing orifice plate 44 in the airflow passage is different, the flow area of ​​the airflow passage is different, and the damping and pressure reducing effect of the pressure reducing orifice plate 44 on the airflow is different. The greater the wind pressure, the greater the damping and pressure reducing effect of the pressure reducing orifice plate 44 on the airflow. For example, the pressure reducing orifice plate 44 rotates to Figure 2 When the limit working position shown in (i.e. the rotation angle of the pressure reducing orifice 44 from the initial position is the largest), it is perpendicular or substantially perpendicular to the air inlet direction of the airflow in the airflow passage. At this time, the airflow passage is intercepted by the pressure reducing orifice 44 to the greatest extent, and the pressure reducing orifice 44 has the greatest blocking effect on the airflow. The flow area of ​​the airflow passage is the minimum flow area. However, since there are some vents 440 on the pressure reducing orifice 44, and the air intake pressure is relatively large, therefore, under the joint action of the high wind pressure and the vents 440, it can be ensured that the amount of fresh air passing through does not change much compared with the normal wind speed, thereby ensuring the normal supply of fresh air and avoiding airflow fluctuations affecting the normal fresh air demand of the indoor air conditioner or ventilation device. At this time, the airflow entering the fresh air outlet device passes through the air inlet pipe 2, the vents 440 on the pressure reducing orifice 44, the flow holes 450 on the power plate 45, and the air outlet pipe 3 in sequence.

[0057] The damping mechanism 5 is arranged outside the box 1, and includes a reaction rod 51, a counterweight 52 and a limit stopper 53. One end of the reaction rod 51 is fixedly connected to the rotating shaft 42, and the other end is fixedly connected to the counterweight 52, and is located between the angles of the pressure reducing orifice plate 44 and the power plate 45. The damping mechanism 5 and the rotary pressure reducing mechanism 4 are fixedly connected through the rotating shaft 42 and rotate as a whole. The reaction rod is in an initial equilibrium position basically vertically downward in a windless state. At this time, the damping mechanism 5 does not generate reverse rotational resistance. When the incoming wind pressure increases, the forward rotation angle of the rotating decompression mechanism 4 under the action of the airflow and wind pressure increases, and drives the damping mechanism 5 to rotate as a whole, so that the angle of the reaction rod 51 deviating from the vertically downward initial equilibrium position also increases. Under the action of gravity, the counterweight block 52 generates a reverse rotation torque (i.e., reverse rotational resistance) on the reaction rod 51, which also increases, so that the rotating decompression mechanism 4 can reach dynamic balance in a suitable working position. The greater the incoming wind pressure, the greater the dynamic balance rotation angle of the rotating decompression mechanism 4, and the greater the air flow throttling and decompression amount, so that the air supply pressure of the air outlet pipe 3 remains basically stable, so as to reduce the fluctuation of the air flow caused by strong winds or typhoons, so that the fresh air outlet device has a typhoon-proof function, and ensures the normal operation and safety of the indoor air conditioning or ventilation device.

[0058] In addition, the box body 1 is a cylindrical static pressure box, the air inlet pipe 21 is a horizontal pipe section and is located at the lower side of the box body 1, and the air outlet pipe 3 is located at the upper side of the box body 1, which can make the air inlet flow along the cylindrical wall (i.e. Figure 1 The second arc-shaped wall 12) in the middle makes an arc-shaped motion, and the centrifugal force generated by the arc-shaped motion is used to separate the raindrops in the airflow and fall on the inner wall surface of the box. Then, they fall along the inner wall surface of the box under the action of gravity and are discharged to the outside through the air inlet pipe 2. In addition, the airflow direction is changed by 90° through the cylindrical static pressure box, and flows out from bottom to top, and the cross-sectional area of ​​the airflow passage of the box body 1 is enlarged by 1.5 to 2 times relative to the cross-sectional area at the air inlet of the air inlet pipe 2, so that the airflow velocity in the box body 1 is greatly reduced. These technical measures will play a role in removing moisture from the airflow and prevent raindrops from being brought into indoor devices by the airflow. Combined with the rainproof shutters 6 at the air inlet of the air inlet pipe 2, it can have a good rainproof effect.

[0059] In addition, the end faces of the pressure reducing orifice plate 44 and the partition plate 43 in the box body 1 maintain a gap greater than 5 mm and less than 10 mm with the inner wall of the box body 1 to avoid getting stuck; the edge of the wind pressure sensing panel 451 of the power plate 45 maintains a gap greater than 30 mm with the inner wall of the box body 1 to reduce the influence of the wall boundary layer and allow it to fully feel the speed of the airflow.

[0060] Preferably, the air inlet pipe 2 is a rectangular tubular structure and can be made of galvanized steel plate, stainless steel plate or aluminum alloy plate.

[0061] For further information, see Figure 1 and Figure 2 The cross-sectional area of ​​the connecting pipe 22 of the air inlet pipe 2 gradually increases along the air inlet direction, which is beneficial to the decompression and deceleration of the air flow, and the bottom surface height gradually rises along the air inlet direction, thereby forming a rainproof slope that gradually tilts upward from the outdoors to the indoors, so as to facilitate the discharge of rainwater inside the device, and the end away from the outer wall is tilted upward relative to the end close to the outer wall, and the inclination slope is greater than 1%.

[0062] Specifically, see Figure 6 The pressure reducing orifice plate 44 is a flat plate structure provided with a number of vent holes 440 , and the total opening area of ​​these vent holes 440 is 25% to 30% of the total area of ​​the pressure reducing orifice plate 44 .

[0063] Specifically, see Figure 5 The power plate 45 is a U-shaped frame structure, the U-shaped bottom end of the U-shaped frame structure is a wind pressure sensing panel 451, both sides of the U-shaped opening of the U-shaped frame structure are connection ends for connecting to the rotating shaft 42, and the U-shaped cavity of the U-shaped frame structure is a flow hole 450 that allows most airflow to pass through.

[0064] Specifically, the partition plate 43 is a complete flat plate, and its function is to prevent the airflow from circulating in the box body 1 and prevent the generation of whistling noise. During the rotation of the rotary decompression mechanism 4, the partition plate 43 is always in the area of ​​the first arc-shaped wall 11 of the box body 1, and not in the airflow path.

[0065] Specifically, the connecting end of the reaction rod 51, the connecting end of the pressure reducing orifice plate 44, the connecting end of the power plate 45, and the connecting end of the partition plate 43 are respectively mounted on the rotating shaft 42 through a sleeve structure, and the sleeve structure is fixedly connected to the rotating shaft 42 by a pin, thereby ensuring that the pressure reducing orifice plate 44, the power plate 45, the partition plate 43 and the reaction rod 51 rotate together.

[0066] In order to further optimize the above technical solution, the above-mentioned fresh air outlet device also includes a limit stopper 53. The limit stopper 53 is arranged on the outside of the housing 1. When the pressure reducing orifice 44 rotates to the extreme working position in the airflow passage, the throttling and pressure reducing effect on the airflow is the greatest. At this time, the reaction rod 51 rotates to the position of the limit stopper 53. The limit stopper 53 is used to limit the reaction rod 51 to prevent the excessive rotation of the rotary pressure reducing mechanism 4 and realize the rotation limit of the rotary pressure reducing mechanism 4. Its limit position is the extreme position where the pressure reducing orifice 44 completely closes the flow channel. It can be seen that the limit stopper 53 can prevent the rotary pressure reducing mechanism 4 from getting stuck, and facilitate the automatic resetting of the rotary pressure reducing mechanism 4.

[0067] Preferably, both ends of the rotating shaft 42 are rotatably disposed on the housing 1 through bearings 41 , respectively, to support the rotating shaft 42 and reduce the rotation resistance of the rotating shaft 42 to prevent it from being stuck.

[0068] Preferably, the housing 1 can be made of galvanized steel plate, stainless steel plate or aluminum alloy plate. On the housing 1, the position for installing the bearing 41 and the position for installing the limit stopper 53 are reinforced with angle steel or channel steel due to the large force. In addition, the connection between the air inlet duct 2 and the housing 1 and the connection between the air outlet duct 3 and the indoor air duct are both connected with angle steel flanges.

[0069] Preferably, the power plate 45, the pressure reducing orifice plate 44, the rotating shaft 42, and the reaction rod 51 are all made of aluminum alloy or stainless steel; the counterweight block 52 is fixed to the end of the reaction rod by bolts, and the counterweight block 52 is usually made of steel, and its mass is adjustable, for example, according to the level of typhoon protection, its mass can be determined through experiments.

[0070] Specifically, the fresh air inlet device is basically installed inside the building, which does not affect the aesthetic appearance of the building and is not easily blown away by typhoons, thereby improving the safety against typhoons.

[0071] In order to further optimize the above technical solution, a rainproof shutter 6 is provided on the air inlet side of the air inlet pipe 2 of the above-mentioned fresh air outlet device. The rainproof shutter 6 is generally installed on the outside of the outer wall, at the outdoor port of the through-wall pipe 21 of the air inlet pipe 2, and plays the role of first-level wind and rain protection, which is conducive to improving the typhoon protection performance of the fresh air outlet device.

[0072] Preferably, the rainproof louver 6 can be made of aluminum alloy, and the fixed louver unit is a rectangular structure, and its specifications and dimensions are compatible with the wall-penetrating pipe 21 of the air inlet pipe 2.

[0073] In summary, the fresh air inlet device provided by the specific embodiment of the present invention has the following advantages:

[0074] (a) By rotating the mechanical mechanism of the pressure reducing mechanism 4 and the damping mechanism 5, the flow area and pressure reducing amount of the air flow passage can be automatically adjusted according to the strength of the incoming air pressure, so that the outlet air pressure and air volume of the fresh air inlet device are basically stable, and the device has the function of preventing strong winds.

[0075] (b) The box body 1 is a cylindrical static pressure box. Through the centrifugal dehydration effect of the airflow flowing in the arc-shaped flow channel, the change of flow direction, the expansion and deceleration of the flow channel, and the rainproof shutters 6 set at the air inlet, these four technical measures can remove moisture from the airflow and prevent raindrops from being brought into the indoor device by the airflow. It can play a good rainproof effect and avoid the safety hazards caused by rainwater entering the indoor air conditioning or ventilation system.

[0076] Finally, it should be noted that the rotary pressure reducing mechanism 4 described herein is the optimal embodiment provided by the present invention. In other specific embodiments, it is also possible to detect the wind pressure through a sensor and drive the pressure reducing orifice to rotate to a suitable position in the air flow path through a motor, so that the fresh air outlet device has a typhoon protection function; or, according to the typhoon intensity, the pressure reducing orifice is directly rotated to a suitable position in the air flow path by manual adjustment, so that the fresh air outlet device has a typhoon protection function; or, other mechanisms are used to control the position of the pressure reducing orifice in the air flow path. The present invention does not make specific limitations on this.

[0077] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0078] (c) The fresh air vents are basically installed indoors, which neither affects the aesthetics of the building's exterior nor is it attacked or damaged by outdoor typhoons. Therefore, they have better safety and aesthetics.

Claims

1. A new air outlet device with typhoon protection function, characterized in that: It comprises a cylindrical box (1), a rotating decompression mechanism (4) arranged inside the box (1), and a damping mechanism (5) arranged outside the box (1), wherein: The box body (1) is provided with a horizontally arranged air inlet pipe (2) and an air outlet pipe (3) with an outlet arranged vertically upward; The rotary pressure reducing mechanism (4) comprises a pressure reducing orifice plate (44), a power plate (45), a partition plate (43), a rotating shaft (42) and a bearing (41); the rotating shaft (42) is rotatably arranged on the central axis of the box body (1); the pressure reducing orifice plate (44), the power plate (45) and the partition plate (43) are all fixedly arranged on the rotating shaft (42) and maintain a preset angle, and can rotate integrally around the rotating shaft (42); the pressure reducing orifice plate (44) is provided with a number of vents (440) that allow a small portion of air to pass through; the power plate (45) is provided with a flow hole (450) that allows most of the air to pass through and a wind pressure sensing panel (451) for sensing wind pressure, thereby providing positive rotational power for the rotary pressure reducing mechanism (4); The damping mechanism (5) comprises a reaction rod (51) and a counterweight (52); one end of the reaction rod (51) is fixedly connected to the rotating shaft (42), and the other end is fixedly connected to the counterweight (52); the reaction rod (51) is located outside the housing (1) and between the angles of the pressure reducing orifice plate (44) and the power plate (45); the counterweight (52) generates a reverse rotation torque on the reaction rod (51) under the action of gravity, so as to provide reverse rotation resistance for the rotating pressure reducing mechanism (4); The two sides of the air inlet pipe (2) and the air outlet pipe (3) divide the box body (1) into a first arc-shaped wall (11) and a second arc-shaped wall (12); the two ends of the first arc-shaped wall (11) are respectively fixedly connected to the air inlet pipe (2) and the air outlet pipe (3), and the curvature of the first arc-shaped wall (11) is equal to the included angle between the partition plate (43) and the pressure reducing hole plate (44); the upper end of the second arc-shaped wall (12) is fixedly connected to the air outlet pipe (3), and the lower end is the tangent line between the lower side panel of the indoor port of the through-wall pipe (21) of the air inlet pipe (2) and the bottom of the cylindrical box body (1); the air inlet pipe (2), the second arc-shaped wall (12) and the air outlet pipe (3) form an airflow passage with an arc-shaped middle portion, and the flow direction of the airflow is rotated 90 degrees counterclockwise; The partition plate (43) is a closed panel, and is located in a fan-shaped area formed by the first arc-shaped wall (11) of the box body (1), so that the incoming air flows along the arc-shaped airflow channel formed by the second arc-shaped wall (12) of the box body; A limit stopper (53) is provided on the outer side of the box body (1) at the rotation limit position of the reaction rod (51).

2. The fresh air inlet device with typhoon protection function according to claim 1 is characterized in that: The pressure reducing orifice plate (44) is provided with a number of vent holes (440) arranged evenly, and the total opening area of ​​the vent holes (440) is 25% to 30% of the total area of ​​the pressure reducing orifice plate (44).

3. The fresh air inlet device with typhoon protection function according to claim 1 is characterized in that: The power plate (45) is a U-shaped frame structure, the U-shaped bottom end of the U-shaped frame structure is the wind pressure sensing panel (451), both sides of the U-shaped opening of the U-shaped frame structure are connection ends for connecting to the rotating shaft (42), and the U-shaped cavity of the U-shaped frame structure is the circulation hole (450).

4. The fresh air inlet device with typhoon protection function according to claim 1, characterized in that: The connection end of the power plate (45), the connection end of the pressure reducing orifice plate (44), the partition plate (43) and the connection end of the reaction rod (51) are all sleeved on the rotating shaft (42) via a sleeve structure, and the sleeve structure and the rotating shaft (42) are fixedly connected via a pin.

5. The fresh air inlet device with typhoon protection function according to claim 1, characterized in that: The air inlet pipe (2) comprises a wall-penetrating pipe (21) and a connecting pipe (22); the wall-penetrating pipe (21) is a rectangular straight pipe section with a constant cross-sectional area, which penetrates the outer wall and is used to introduce air from the outdoor side to the indoor side; one side of the connecting pipe (22) is connected to the wall-penetrating pipe (21), and the other side is connected to the lower part of the box body (1).

6. The fresh air inlet device with typhoon protection function according to claim 1, characterized in that: The reaction rod (51) is in an initial equilibrium position substantially vertically downward in a windless state, and the counterweight (52) is fixed to the end of the reaction rod (51) by means of bolts, and its mass is adjustable.

7. The fresh air inlet device with typhoon protection function according to claim 1, characterized in that: A rainproof shutter (6) is provided on the outdoor side of the air inlet pipe (2).

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