CN213178581U - Fresh air inlet device with typhoon prevention function - Google Patents

Abstract

The utility model discloses a fresh air inlet device with prevent typhoon function. The fresh air inlet device comprises a cylindrical box body, a rotary pressure reducing mechanism and a damping mechanism, wherein the rotary pressure reducing mechanism comprises a power plate, a pressure reducing pore 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 body; the rotary decompression mechanism and the damping mechanism are fixedly connected and integrally rotate, and the power plate in the airflow channel is pushed by wind pressure to drive the rotary mechanism to rotate; the pressure reducing pore plate is provided with an air vent allowing a small part of air flow to pass through, under the pushing action of air pressure on the power plate and the damping action of the damping mechanism, the pressure reducing pore plate can rotate into the air flow passage and can be positioned at different working positions in the air flow passage to change the flow area of the air flow passage, the effect of reducing the pressure of the air flow is realized, and the larger the air pressure of the air inlet is, the larger the pressure reduction amount is. The device can not only work normally when normal wind speed, and has the typhoon-proof function that reduces the wind pressure, gets rid of the rainwater during the typhoon.

Description

Fresh air inlet device with typhoon prevention function

Technical Field

The utility model relates to an air conditioner ventilation technical field, concretely relates to fresh air inlet device with prevent typhoon function.

Background

Building air conditioners and ventilation systems usually need to be provided with fresh air inlets on the outer wall of a building for introducing fresh air so as to meet the requirements of people in the building on fresh air volume in the breathing or technological process. The air speed of inlet air of the fresh air opening of the building is usually less than 8 m/s.

However, the coastal areas are often subjected to typhoon treatment, and strong wind and rainstorm can be brought by the typhoon. For example, the maximum wind force of the strong typhoon of Wilmason landing in Wenchang Hainan on 7 months and 18 days 2014 reaches 60 m/s.

Typhoon can cause adverse effect to the fresh air inlet on the building outer wall, and strong wind openly blows the fresh air inlet and can be to producing powerful wind pressure, then can make the amount of wind of fresh air inlet too big, influences the performance of air conditioner or ventilation system, then can cause the pipeline and the equipment of air conditioner or ventilation system to damage by weight. In addition, typhoons often cause rainstorms, and strong winds carry the rainstorms into the air conditioning or ventilation system from the fresh air inlet, which can cause safety hazards.

Therefore, typhoon prevention of the fresh air opening is an important technical problem to be solved urgently in air conditioning and ventilation systems of buildings, offshore structures and ships in coastal areas, and the key needs to solve the problem of how to reduce air pressure and remove rainwater when strong wind blows against the fresh air opening positively, and improve the safety and the attractiveness of the fresh air opening.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a fresh air inlet device (new wind inlet device for short) with prevent typhoon function, this fresh air inlet device not only can normally work when low wind speed, moreover, can be according to the automatic steady voltage that reduces pressure of the wind pressure of air inlet, get rid of the rainwater of air inlet during the typhoon, consequently have prevent wind and rain-proof prevent typhoon function.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a fresh air inlet device with prevent typhoon function, includes the box of cylinder, sets up rotatory decompression mechanism in the box, sets up the damping mechanism outside the box, wherein:

the box body is provided with an air inlet pipe which is horizontally arranged and an air outlet pipe with an outlet which is vertically and upwards arranged.

The rotary pressure reducing mechanism comprises a pressure reducing pore plate, a power plate, a partition plate, a rotating shaft and a bearing, wherein the rotating shaft is rotatably arranged on a circular central axis of the box body, and the pressure reducing pore plate, the power plate and the partition plate are fixedly arranged on the rotating shaft, keep preset included angles and can integrally rotate around the rotating shaft; the pressure-reducing pore plate is provided with a plurality of vent holes for allowing a small part of air flow to pass through; the power plate is provided with a circulation hole allowing most of air flow to pass through and a wind pressure induction panel for inducing wind pressure, and positive rotary power is provided for the rotary pressure reducing mechanism.

The damping mechanism comprises a reaction rod, a balancing weight and a limiting stopper, wherein one end of the reaction rod is fixedly connected with the rotating shaft, and the other end of the reaction rod is fixedly connected with the balancing weight; the reaction rod is positioned on the outer side of the box body and is positioned between the pressure reducing pore plate and the power plate; the reaction rod is in a substantially vertically downward initial equilibrium position in the windless state; under the strong wind state, rotatory pressure reducing mechanism produces forward rotation under the wind pressure effect, drives the rotatory vertical decurrent initial balance position of skew of reaction pole, the balancing weight produces the moment of reverse rotation under the action of gravity on the reaction pole, is used for doing rotatory pressure reducing mechanism provides reverse rotation resistance.

In the fresh air inlet device, the box body is divided into a first circular arc-shaped wall and a second circular arc-shaped wall by two sides of the air inlet pipe and the air outlet pipe;

two ends of the first arc-shaped wall are fixedly connected with the air inlet pipe and the air outlet pipe respectively, and the radian of the first arc-shaped wall is equal to the included angle between the partition plate and the pressure reduction pore plate;

the upper end of the second arc-shaped wall is fixedly connected with the air outlet pipe, and the lower end of the second arc-shaped wall is a tangent line of a lower side panel of an indoor port of the wall penetrating pipe of the air inlet pipe and the bottom of the cylindrical box body;

the partition plate is a closed panel and is positioned in a fan-shaped area formed by the first arc-shaped wall of the box body, so that the inlet air flows along an arc-shaped airflow channel formed by the second arc-shaped wall of the box body.

Optionally, in the fresh air inlet device, the pressure-reducing pore plate is provided with a plurality of uniformly arranged vent holes, and the total open area of the vent holes is 25% to 30% of the total area of the pressure-reducing pore plate.

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

Optionally, in the fresh air inlet device, the connection end of the power plate, the connection end of the pressure reducing orifice plate, the connection end of the partition plate and the connection end of the reaction rod are all sleeved on the rotating shaft through a sleeve structure, and the sleeve structure is fixedly connected with the rotating shaft through a pin.

Optionally, in the fresh air inlet device, a limit stopper is disposed outside the casing at a rotation limit position of the reaction rod.

Optionally, the weight is fixed to the end of the reaction rod by a bolt, and the mass of the weight is adjustable.

Optionally, in the fresh air inlet device, a rainproof louver is disposed outside the air inlet pipe.

Optionally, in the fresh air inlet device, a bottom surface of the connection pipe of the air inlet pipe located at the indoor side is provided with an inclined surface gradually rising along the air inlet direction.

Optionally, in the fresh air inlet device, the bottom of the connecting pipe is gradually raised along the air inlet direction, the bottom surface of the connecting pipe is tangent to the bottom of the box body, and the sectional area of the connecting pipe is gradually increased along the air inlet direction.

Optionally, in the fresh air inlet device, the rotating shaft is fixed to the casing through a bearing, and the casing is provided with a reinforcing frame for supporting the bearing at a bearing mounting position.

According to the above technical scheme, the utility model provides an among the fresh air inlet device with prevent typhoon function, the wind pressure of air inlet is used in the wind pressure response panel of power board, make rotatory pressure reduction mechanism produce forward rotary power, make the decompression orifice plate rotationally set up in air current path, make the skew balanced position of damping mechanism simultaneously, produce reverse resistance, the result of these two kinds of opposite revolving force combined action, make a certain position of decompression orifice plate dynamic balance in the runner, the wind pressure of air inlet is big more, the runner that the decompression orifice plate got into is more, its throttle decompression effect is also big more, consequently, this fresh air inlet device has and carries out decompression according to air inlet pressure is automatic to be adjusted, the big decompression volume of air inlet pressure is also big more, realize air outlet wind pressure and air volume basic stability. This fresh air inlet device not only can normally work when normal wind speed, moreover, during the typhoon, this fresh air inlet device can carry out decompression steady voltage to the air current that admits air automatically, in order to reduce the fluctuation of wind pressure and air current flow that gale or typhoon arouse, and through the air current in the centrifugal dehydration effect that the circular arc runner flows, the expansion of runner, the rainwater that the air current smugglied secretly is detached to the change of air current direction and the technical measure that the air intake set up rain-proof shutter, thereby make fresh air inlet device have prevent the function of typhoon of preventing wind and rain, guarantee indoor air conditioner or ventilation system's normal work and security.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an elevation view of a fresh air inlet device with a typhoon prevention function provided in an embodiment of the present invention in an outdoor no-wind or breeze state;

fig. 2 is an elevation view of the fresh air inlet device with typhoon prevention function provided by the embodiment of the invention in outdoor strong wind state;

FIG. 3 is a cross-sectional view of section A-A of FIG. 1;

FIG. 4 is a cross-sectional view of section B-B of FIG. 3 (outdoor no-wind or breezy state);

FIG. 5 is a cross-sectional view of section C-C of FIG. 1;

FIG. 6 is a cross-sectional view taken along section D-D of FIG. 1;

fig. 7 is a diagrammatic cross-sectional view of section E-E in fig. 2.

Wherein:

1-a box body, 11-a first circular arc-shaped wall, 12-a second circular arc-shaped wall;

2-an air inlet pipe, 21-a wall penetrating pipe and 22-a connecting pipe;

3-air outlet pipe;

4-a rotary pressure reducing mechanism;

41-bearing, 42-rotating shaft, 43-partition plate,

44-a pressure reducing orifice plate, 440-a small vent hole,

45-power plate, 450-circulation hole, 451-wind pressure induction panel;

5-a damping mechanism;

51-reaction rod, 52-counterweight block, 53-limit stopper;

6-rain-proof shutter.

Detailed Description

The utility model discloses a specific embodiment provides a fresh air inlet device (the fresh air inlet device for short) with prevent typhoon function, this fresh air inlet device not only can normally work when low wind speed, moreover, can be according to the automatic steady voltage that reduces pressure of the wind pressure of air inlet, get rid of the rainwater of air inlet during the typhoon, consequently have prevent wind and rain-proof prevent typhoon function.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model discloses the fresh air inlet device with prevent typhoon function that embodiment provided, including the box 1 of cylinder, set up the air-supply line 2 that the level on box 1 was arranged and export the vertical play tuber pipe 3 of upwards arranging, set up at the inside rotatory decompression mechanism 4 of box 1, set up at 1 outside damping mechanism 5 of box and set up the rain-proof shutter 6 in air inlet department.

In the above fresh air inlet device, the air inlet duct 2 and the air outlet duct 3 divide the box body into a first circular arc-shaped wall 11 and a second circular arc-shaped wall 12, that is, as shown in fig. 1: the two ends of the first arc-shaped wall 11 are respectively connected with the air inlet pipe 2 and the air outlet pipe 3 and are positioned at one side of the air inlet pipe 2 and one side of the air outlet pipe 3; the two ends of the second arc-shaped wall 12 are respectively connected with the air inlet pipe 2 and the air outlet pipe 3 and are positioned at the other sides of the air inlet pipe 2 and the air outlet pipe 3;

two ends of the first arc-shaped wall 11 are fixedly connected with the air inlet pipe 2 and the air outlet pipe 3 respectively, and the radian of the first arc-shaped wall 11 is equal to the included angle between the partition plate and the pressure reduction pore plate;

the upper end of the second circular arc-shaped wall 12 is fixedly connected with the air outlet pipe 3, and the lower end of the second circular arc-shaped wall is a tangent line of a lower side panel of an indoor port of the air inlet pipe 21 and the bottom of the cylindrical box body;

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 part, and the flowing direction of the air flow rotates 90 degrees anticlockwise.

The rotary decompression mechanism 4 is arranged in the box body 1 and specifically comprises a decompression 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 a circular central axis of the box body 1, and the pressure reducing pore plate 44, the power plate 45 and the partition plate 43 are all arranged on the rotating shaft 42 and keep a preset included angle; the pressure-reducing orifice 44 is provided with vents 440 to allow a small portion of the airflow to pass through; the power plate 45 is provided with a circulation hole 450 allowing most of the air flow to pass therethrough and a wind pressure sensing panel 451 for sensing wind pressure. The center line of the rotary shaft 42 coincides with the central axis of the cylindrical side wall of the cylindrical casing 1.

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

The air inlet pipe 2 comprises a wall penetrating pipe 21 and a connecting pipe 22, wherein the wall penetrating pipe 21 is a rectangular straight pipe section with equal cross-sectional area, runs through an outer wall and is used for introducing air into the indoor side from the outdoor side, one side of the connecting pipe 22 is connected with the wall penetrating pipe 21, and the other side of the wall penetrating pipe is connected with the lower portion of the box body 1 and is used for introducing air into the cylindrical box body 1.

The air outlet pipe 3 is located at the upper part of the indoor box body 1 and is used for conveying fresh air sent by the fresh air inlet device to indoor devices (such as an air conditioning device, an air processing device and a ventilation device).

In the use, power board 45 is the inductor of the wind speed and the wind pressure of air inlet:

referring to fig. 1, when the air pressure in the air inlet pipe 2 is small, i.e. in the normal wind speed (no wind or breeze), the reaction rod 51 is located at the initial equilibrium position substantially vertically downward, the pressure reducing orifice plate 44 is located at the initial position of the lower portion 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 inlet air, the flow area of the air flow channel is the maximum flow area, the air flow 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 holes 450 on the power plate 45 and flows out from the air outlet pipe 3, and the pressure reducing orifice plate does not perform the pressure reducing function.

Referring to fig. 2, when the wind pressure entering the air inlet pipe 2 is large, i.e. during strong wind or typhoon, the wind pressure sensing panel 451 of the power plate 45 rotates forward under the wind pressure of the high-speed airflow and drives the entire rotary pressure reducing mechanism to rotate forward, thereby driving the pressure reducing orifice plate 44 to rotate into the circular arc airflow path, so that the flow area of the airflow path is reduced, thereby blocking part of the airflow and playing the role of throttling and reducing pressure. At this time, the larger the wind pressure of the intake air, the larger the rotation angle of the pressure reduction orifice plate 44 entering the circular arc airflow path, the smaller the flow area of the circular arc airflow path, and the larger the pressure reduction effect on the intake air. The positions of the pressure reduction orifice plates 44 in the airflow paths are different, the flow areas of the airflow paths are different, and the damping pressure reduction action of the pressure reduction orifice plates 44 on the airflow is different. The greater the wind pressure, the greater the damping pressure reduction effect of the pressure reduction orifice plate 44 on the airflow. For example, when the pressure reducing orifice plate 44 rotates to the extreme working position shown in fig. 2 (i.e. the rotation angle of the pressure reducing orifice plate 44 from the initial position is the largest), the pressure reducing orifice plate 44 is perpendicular or substantially perpendicular to the air intake direction of the air flow in the air flow passage, at this time, the air flow passage is intercepted by the pressure reducing orifice plate 44 to the greatest extent, the pressure reducing orifice plate 44 has the greatest blocking effect on the air flow, and the flow area of the air flow passage is the smallest flow area, but because some vent holes 440 are formed in the pressure reducing orifice plate 44 and the air intake pressure is larger, under the combined action of the large air pressure and the vent holes 440, the passing fresh air volume can be ensured to be not changed much compared with the normal air volume, so that the normal fresh air supply is ensured, and the normal fresh air volume requirement of the. At this time, the airflow entering the fresh air inlet device passes through the air inlet pipe 2, the vent hole 440 on the pressure reduction pore plate 44, the circulation hole 450 on the power plate 45 and the air outlet pipe 3 in sequence.

The damping mechanism 5 is disposed outside the case 1 and includes a reaction rod 51, a weight 52, and a stopper 53. One end of the reaction rod 51 is fixedly connected with the rotating shaft 42, and the other end is fixedly connected with the balancing weight 52 and is positioned between the included angles of the pressure reducing pore plate 44 and the power plate 45. The damping mechanism 5 and the rotary decompression mechanism 4 are fixedly connected by a rotating shaft 42 and integrally rotate. The reaction rod is in the initial balance position which is basically vertical downward under the windless state, at this time, the damping mechanism does not generate reverse rotation resistance, when the wind pressure of the inlet wind is increased, the forward rotation angle generated by the rotary decompression mechanism 4 under the action of the wind pressure of the air current is increased, and the damping mechanism 5 is driven to integrally rotate, so that the angle of the reaction rod 51 deviating from the initial balance position which is vertical downward is also increased, the moment (namely, reverse rotation resistance) generated by the counter weight block 52 on the reaction rod 51 in reverse rotation is also increased under the action of gravity, so that the rotary decompression mechanism 4 can achieve dynamic balance at a proper working position, the larger the wind pressure of the inlet wind is, the larger the rotation angle of the rotary decompression mechanism 4 in dynamic balance is, the larger the decompression amount of the air current is, so that the wind pressure of the air supply of the air outlet pipe 3 is kept basically stable, and the fluctuation of the air current flow, therefore, the fresh air inlet device has the typhoon prevention function, and the normal work and safety of the indoor air conditioner or the ventilation device are guaranteed.

In addition, the box body 1 is a cylindrical static pressure box, the air inlet pipe 21 is a horizontal pipe section and is positioned at the lower side of the box body 1, the air outlet pipe 3 is positioned at the upper side of the box body 1 and can enable the air inlet flow to do circular arc motion along the cylindrical wall (namely, a second circular arc wall 12 in figure 1), raindrops in the air flow are separated and fall off on the inner wall surface of the box body by utilizing the centrifugal force generated by the circular arc motion, then fall down along the inner wall surface of the box body under the action of gravity and are discharged out of the room by the air inlet pipe 2, in addition, the air flow direction of the cylindrical static pressure box is changed by 90 degrees and flows out from bottom to top, the cross section area of the air flow passage of the box body 1 is enlarged by 1.5 to 2 times relative to the cross section area of the air inlet pipe 2, the flow velocity of the air flow in the box body 1 is greatly reduced, the technical, can play a good rainproof effect.

In addition, the end surfaces of the pressure reducing pore plate 44 and the partition plate 43 in the box body 1 and the inner wall of the box body 1 keep a gap larger than 5mm and smaller than 10mm so as to avoid clamping; the edge of the wind pressure sensing panel 451 of the power plate 45 keeps a gap of more than 30mm with the inner wall of the box body 1 to reduce the influence of the wall surface boundary layer, so that the power plate can fully sense the speed of the air flow.

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

Further, referring to fig. 1 and 2, the cross-sectional area of the connecting pipe 22 of the air inlet pipe 2 is gradually increased along the air inlet direction, which is favorable for reducing the pressure and speed of the air flow, and the height of the bottom surface of the connecting pipe is gradually raised along the air inlet direction, so that a rain-proof inclined plane which gradually inclines upwards from the outdoor to the indoor is formed, so that the rainwater in the device can be discharged, the end far away from the outer wall is inclined upwards relative to the end close to the outer wall, and the inclination of the inclination is greater than 1%.

Specifically, referring to fig. 6, the pressure reducing orifice plate 44 is a flat plate structure provided with a plurality of vent holes 440, 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.

Specifically, referring to fig. 5, the power plate 45 is a U-shaped frame structure, the bottom end of the U-shape of the U-shaped frame structure is a wind pressure sensing panel 451, two sides of the U-shaped opening of the U-shaped frame structure are connection ends for connecting with the rotating shaft 42, and the U-shaped cavity of the U-shaped frame structure is a circulation hole 450 for allowing most of the airflow to pass through.

Specifically, the partition plate 43 is a complete flat plate, and functions to prevent the air flow from circulating in the case 1 and from generating a whistle noise, and the partition plate 43 is always in the area of the first circular arc-shaped wall 11 of the case 1 and not in the air flow path during the rotation of the rotary decompression mechanism.

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 sleeved on the rotating shaft 42 through a sleeve structure, and the sleeve structure is fixedly connected with the rotating shaft 42 through a pin, so that the pressure reducing orifice plate 44, the power plate 45, the partition plate 43 and the reaction rod 51 are ensured to rotate together.

In order to further optimize the above technical solution, the fresh air inlet device further comprises a limit stopper 53. The limit stop 53 is arranged on the outer side of the box 1, when the pressure-reducing orifice plate 44 rotates to the limit working position in the airflow path, the throttling and pressure-reducing effect on the airflow is maximum, and at the moment, the reaction rod 51 rotates to the position of the limit stop 53. The limiting stopper 53 is used for limiting the reaction rod 51 to prevent the over-rotation of the rotary pressure reducing mechanism, so as to realize the rotation limitation of the rotary pressure reducing mechanism, and the limiting position is the limiting position at which the pressure reducing orifice plate 44 completely closes the flow channel. Therefore, the limiting stopper 53 can play a role in preventing the rotary pressure reducing mechanism from being stuck, so that the rotary pressure reducing mechanism can be automatically reset conveniently.

Preferably, both ends of the rotating shaft 42 are rotatably disposed on the case 1 through bearings 41, respectively, to support the rotating shaft 42 and reduce the rotation resistance of the rotating shaft 42 to prevent the shaft from being locked.

Preferably, the box body 1 can be made of a galvanized steel plate, a stainless steel plate or an aluminum alloy plate, and the position for installing the bearing 41 and the position for installing the limit baffle 5 on the box body 1 are stressed greatly, so that angle steel or channel steel is adopted for reinforcement. In addition, the connection part of the air inlet pipe 2 and the box body 1 and the connection part of the air outlet pipe 3 and the indoor air pipe are connected by adopting angle steel flanges.

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 materials; the weight 52 is fixed to the end of the reaction rod by means of bolts, the weight 52 being generally made of steel, the mass of which is adjustable, for example determined experimentally according to the typhoon protection class.

Particularly, the fresh air inlet device is basically installed inside a building, the appearance attractiveness of the building is not influenced, typhoon cannot easily blow off, and the typhoon prevention safety is improved.

In order to further optimize the technical scheme, a rainproof shutter 6 is arranged on the air inlet side of the air inlet pipe 2 of the fresh air inlet device. The rainproof shutter 6 is generally installed at the outer side of an outer wall and the outdoor port of the wall penetrating pipe 21 of the air inlet pipe 2, plays a role in first-stage windproof and rainproof, and is favorable for improving the typhoon prevention performance of the fresh air inlet device.

Preferably, the rain-proof shutter 6 can be made of aluminum alloy, the fixed shutter unit is of a rectangular structure, and the specification and the size of the fixed shutter unit are matched with those of the wall penetrating pipe 21 of the air inlet pipe 2.

To sum up, the utility model discloses specific embodiment provides a fresh air inlet device has following advantage:

(a) through the mechanical mechanisms of the rotary pressure reducing mechanism 4 and the damping mechanism 5, the flow area and the pressure reducing amount of an airflow channel can be automatically adjusted according to the strength of the air inlet pressure, so that the outlet air pressure and the air volume of the fresh air inlet device are basically stable, and the fresh air inlet device has the function of strong wind prevention.

(b) The box body 1 is a cylindrical static pressure box, and a rainproof shutter 6 arranged at an air inlet is arranged at the position of the air inlet and used for centrifugal dehydration action, flow direction change and flow channel expansion and deceleration of air flow in the circular arc-shaped flow channel.

(c) The fresh air opening device is basically arranged indoors, the appearance attractiveness of a building is not influenced, and the fresh air opening device cannot be attacked and damaged by outdoor typhoon, so that the fresh air opening device has better safety and attractiveness.

Finally, it should be noted that the rotary pressure reducing mechanism described herein is the preferred embodiment of the present invention. In other specific embodiments, the pressure of the air can be detected by a sensor, and the pressure reducing pore plate is driven by a motor to rotate to a proper position in the airflow passage, so that the fresh air inlet device has a typhoon prevention function; or the pressure reduction pore plate is directly rotated to a proper position in the airflow passage in a manual adjusting mode according to the typhoon intensity, so that the fresh air inlet device has the typhoon prevention function; alternatively, other mechanisms are employed to control the position of the pressure relief orifice plate in the airflow path. The present invention is not limited to this.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make 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 invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The utility model provides a fresh air inlet device with prevent typhoon function which characterized in that, includes cylindrical box (1), sets up rotatory decompression mechanism in box (1), sets up the damping mechanism outside box (1), wherein:

an air inlet pipe (2) which is horizontally arranged and an air outlet pipe (3) with an outlet which is vertically and upwardly arranged are arranged on the box body (1);

the rotary pressure reducing mechanism comprises a pressure reducing pore plate (44), a power plate (45), a partition plate (43), a rotating shaft (42) and a bearing (41), wherein the rotating shaft (42) is rotatably arranged on a circular central axis of the box body (1), the pressure reducing pore plate (44), the power plate (45) and the partition plate (43) are fixedly arranged on the rotating shaft (42), keep a preset included angle and can integrally rotate around the rotating shaft (42); the pressure reducing pore plate (44) is provided with a plurality of vent holes (440) for allowing a small part of airflow to pass through; the power plate (45) is provided with a circulation hole (450) allowing most of air flow to pass through and a wind pressure sensing panel (451) for sensing wind pressure, and positive rotation power is provided for the rotary decompression mechanism;

the damping mechanism comprises a reaction rod (51) and a balancing weight (52), one end of the reaction rod (51) is fixedly connected with the rotating shaft (42), and the other end of the reaction rod is fixedly connected with the balancing weight (52); reaction pole (51) are located the outside of box (1), and are in decompression orifice plate (44) with between the contained angle of power board (45), balancing weight (52) produce the moment of counter-rotation on reaction pole (51) under the action of gravity, be used for rotatory decompression mechanism provides reverse rotation resistance.

2. The fresh air inlet device with the typhoon prevention function as claimed in claim 1, wherein the box body (1) is divided into a first circular arc-shaped wall (11) and a second circular arc-shaped wall (12) by two sides of the air inlet pipe (2) and the air outlet pipe (3);

two ends of the first arc-shaped wall (11) are fixedly connected with the air inlet pipe (2) and the air outlet pipe (3) respectively, and the radian of the first arc-shaped wall (11) is equal to the included angle between the partition plate (43) and the pressure reduction pore plate (44);

the upper end of the second arc-shaped wall (12) is fixedly connected with the air outlet pipe (3), and the lower end of the second arc-shaped wall is a tangent line of the lower side panel of the indoor port of the wall penetrating 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 air flow passage with the middle part being arc-shaped, and the flowing direction of air flow is rotated by 90 degrees anticlockwise.

3. The fresh air inlet device with the typhoon prevention function as claimed in claim 2, wherein the partition plate (43) is a closed panel located in the sector area formed by the first circular arc-shaped wall (11) of the box body (1) so that the inlet air flows along the circular arc-shaped air flow channel formed by the second circular arc-shaped wall (12) of the box body.

4. The fresh air inlet device with the typhoon prevention function as claimed in claim 1, wherein the pressure reduction pore plate (44) is provided with a plurality of the vent holes (440) uniformly arranged, and the total open area of the vent holes (440) is 25-30% of the total area of the pressure reduction pore plate (44).

5. The fresh air inlet device with the typhoon prevention function as claimed in claim 1, wherein 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), two sides of the U-shaped opening of the U-shaped frame structure are connection ends for connecting with the rotating shaft (42), and the U-shaped cavity of the U-shaped frame structure is the circulation hole (450).

6. The fresh air inlet device with the typhoon prevention function as claimed in claim 1, wherein the connecting end of the power plate (45), the connecting end of the pressure reduction pore plate (44), the connecting end of the partition plate (43) and the reaction rod (51) are all sleeved on the rotating shaft (42) through a sleeve structure, and the sleeve structure is fixedly connected with the rotating shaft (42) through a pin.

7. Fresh air inlet device with typhoon prevention function as claimed in claim 1, characterized in that a limit stop (53) is provided at the rotation limit position of the reaction rod (51) at the outside of the case (1).

8. The fresh air inlet device with the typhoon prevention function as claimed in claim 1, wherein 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 uniform cross-sectional area, penetrates through an outer wall, and is used for introducing inlet air from an outdoor side to an indoor side, one side of the connecting pipe (22) is connected with the wall penetrating pipe (21), and the other side is connected with the lower part of the box body (1).

9. The fresh air inlet device with the typhoon prevention function as claimed in claim 8, wherein the bottom of the connecting pipe (22) is gradually raised along the air intake direction, the bottom surface is tangent to the bottom of the box body (1), and the cross-sectional area of the connecting pipe (22) is gradually increased along the air intake direction.

10. The fresh air inlet device with the typhoon prevention function as claimed in claim 6, wherein the rotary shaft (42) is fixed on the case (1) through a bearing (41), and the case (1) is provided with a reinforcing frame for supporting the bearing (41) at the bearing installation place.

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