CN114593485A - Public space new forms of energy breather - Google Patents

Abstract

The invention belongs to the technical field of air conditioning, and relates to a new energy air interchanger for a public space, which comprises an air interchanger, wherein the air interchanger is arranged in a ventilating duct, the ventilating duct is communicated with an indoor air box and an outdoor air box, a vent is arranged on a partition plate, and an adjusting door is rotatably arranged on the partition plate; the link gear includes the rocking arm, and the one end of rocking arm is connected the other end with the motor and is articulated with the connecting rod, and closing mechanism includes the guide rail, and the guide rail is fixed on the baffle, connecting rod and slide bar fixed connection, slide bar slidable mounting are in the guide rail, and the one end of bracing piece articulates on the supporting seat with the articulated other end of slide bar, and the supporting seat is fixed on adjusting the door, is provided with solar cell panel on adjusting the door. The adjusting door shields the opening of the outdoor air box, the outdoor air can enter the outdoor air box through the ventilation opening in the partition plate by opening the adjusting door, the outdoor air box can be sealed after the adjusting door is closed, the ventilation fan is prevented from being damaged when wind power is too large, and meanwhile rain and snow are prevented from entering the indoor space.

Description

A new energy ventilation device for public space

technical field

The invention relates to the technical field of air conditioning, in particular to a new energy ventilation device for public spaces.

Background technique

There are three types of ventilation modes: exhaust type, suction type and combined type. The exhaust type enters the air from the natural air inlet and discharges the dirty air through the ventilation fan; the suction type sucks in fresh air through the ventilation fan and discharges the dirty air from the natural exhaust port; The combined type is a type of air conditioning appliance that is used for both suction and exhaust by a ventilation fan, and the motor drives the fan blades to rotate to drive the airflow to exchange indoor and outdoor air, also known as ventilation fans. The purpose of ventilation is to remove indoor pollution. Air, regulates temperature, humidity and sensory effects. Ventilation fans are widely used in homes and public places. Due to the large number of people coming and going in public spaces, the air is relatively turbid and requires a ventilation device for ventilation.

A public space new energy ventilation device with Chinese Patent Literature Bulletin No. CN207365228U includes a box body, an air outlet box is fixedly connected to the left side of the inner wall of the box, and an air intake box is fixedly connected to the right side of the inner wall of the box , and the bottom of the inner wall of the air outlet box is fixedly connected with a first fan, the two sides of the inner wall of the air outlet box are fixedly connected with a first filter screen and a second filter screen in sequence from bottom to top, and the top of the inner wall of the air inlet box is fixedly connected. A second fan is fixedly connected, and a rotating shaft is rotatably connected between two sides of the inner wall of the air intake box; the surface of the rotating shaft is fixedly connected with a disinfection net, and both sides of the inner wall of the air intake box are fixedly connected with temperature plates. This patent is sterilized by being provided with a sterilizing net, while passing through the first fan and the second fan. However, there are still some deficiencies in this patent: 1. After being placed for a long time, the filter screen is easy to fall off dust, and it needs to be cleaned manually before use; To ensure the cleanliness of indoor air; 3. It is difficult to realize the exchange of indoor and outdoor air.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is: in order to solve the problem that the part of the ventilating device located outdoors is easy to be dirty and the ventilation effect is poor when the traditional ventilating device performs indoor and outdoor ventilation, the present invention provides a public space New energy ventilation device to solve the above problems.

The technical solution adopted by the present invention to solve the technical problem is as follows: a new energy ventilation device for public space, comprising a ventilation fan and a ventilation duct, the ventilation fan is arranged in the ventilation duct, and also includes an indoor bellows and an outdoor bellows. One end of the ventilation duct is connected to the indoor bellows, and the other end of the ventilation duct is connected to the outdoor bellows. The opening of the outdoor bellows facing the outdoors is provided with an adjustment door and a partition plate, and the partition plate is provided with a ventilation opening, and the adjustment door corresponds to The air vent is rotatably mounted on the partition plate; it also includes a linkage mechanism and a closing mechanism, the linkage mechanism includes a motor, a rocker arm and a connecting rod, the motor adopts a biaxial motor, and one end of the rocker arm is used. It is fixedly connected with the first output shaft of the motor, the other end of the rocker arm is hinged with the connecting rod, the closing mechanism includes a guide rail, a sliding rod, a support rod and a support seat, and the guide rail is fixed in the vertical direction On the partition plate, the connecting rod is fixedly connected with the sliding rod, the sliding rod is slidably installed in the guide rail, one end of the supporting rod is hinged with the sliding rod, and the other side of the supporting rod is hinged with the sliding rod. One end is hinged on the support seat, the support seat is fixed on the adjustment door, and the outer surface of the adjustment door is also provided with a solar cell panel.

Preferably, a filter plate is also arranged in the outdoor bellows, the filter plate is fixed between the ventilation duct and the partition plate, and a filter cavity is formed between the filter plate and the partition plate.

Preferably, the outdoor bellows is further provided with a cleaning mechanism, the cleaning mechanism is located in the filter cavity, and the cleaning mechanism includes a chute, a brush seat, a guide rod, a connecting plate, a slider and a rocker, the One end of the rocker is fixedly connected with the second output shaft of the motor, the other end of the rocker is hinged on the slider, the slider is slidably mounted on the connecting plate, and one end of the guide rod is fixedly connected with the connecting plate, the other end of the guide rod passes through the side wall of the outdoor air box and is fixed on the brush seat, the brush seat is slidably installed in the chute, the brush The seat is arranged on a side of the filter plate close to the filter cavity, a brush plate is fixed on the brush seat, and a side of the brush plate with bristles is in contact with the filter plate.

Preferably, the filter plate has a plurality of filter slits arranged in the vertical direction.

Preferably, the ventilation duct includes an air inlet duct and an air outlet duct, and ventilation fans are installed in the air inlet duct and the air outlet duct, and the air outlet directions of the two ventilation fans are opposite.

Preferably, a baffle plate is provided in the outdoor bellows, and an air inlet cavity and an air outlet cavity are formed on both sides of the baffle plate, the air inlet duct is communicated with the air inlet cavity, and the air outlet duct is connected with the air outlet. The cavity is communicated, and the baffle is in contact with the filter plate.

Preferably, the ventilation fan has an air inlet and an air outlet, and the area of the air outlet is smaller than that of the air inlet.

Preferably, a filter screen is provided at the opening of the indoor air box facing the room.

Preferably, a dust collecting device is also provided, the dust collecting device includes a scraper, the scraper is arranged in the filter cavity, the two ends of the scraper are slidably installed in a guide groove, and the guide groove is horizontally fixed on the The side wall of the outdoor bellows also includes a connecting rod, the two ends of the connecting rod are hinged with the scraper and the brush seat respectively, and the brush seat drives the scraper to slide along the guide groove through the connecting rod, so the The scraper is in contact with the outdoor bellows, the bottom of the filter cavity is provided with a sewage outlet, and a dust collecting box is clamped at the sewage outlet.

The beneficial effects of the present invention are:

First, the opening of the outdoor bellows is blocked by setting the partition plate and the adjusting door. When ventilation is required, the adjusting door can be opened to allow the outdoor air to enter the outdoor bellows through the ventilation opening on the partition plate. In windy weather, the outdoor bellows can be sealed after closing the adjustment door to prevent damage to the ventilation fan when the wind is too strong, and prevent rain and snow from entering the indoor space.

Second, the outdoor bellows is provided with a filter plate, and a filter cavity is formed between the filter plate and the partition plate. The filter plate filters the air entering the outdoor bellows, and the filtered debris falls into the filter cavity to prevent dust and debris from entering. go indoors.

Third, the filter plate is cleaned while the adjustment door is opened, and two functions are realized through one structure, and the filter plate can be cleaned before each use, avoiding the need to manually clean the filter plate after long-term storage, and at the same time. It ensures the cleaning frequency and cleanliness of the filter plate and improves the quality of indoor air.

Fourth, set up air inlet ducts and air outlet ducts for exhaust and air intake respectively, and at the same time set baffles in the outdoor bellows, and separate the air intake cavity and the air outlet cavity in the outdoor bellows through the baffles to further prevent air intake and air intake. The exhaust air is mixed to prevent the dirty air from being sucked into the room again.

Fifth, through the dust collecting device, the debris and dust cleaned from the filter plate are discharged into the dust box for collection, so as to prevent the dust from accumulating too much and causing the bottom of the filter plate to be blocked. Remove the dust box for cleaning.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

1 is a schematic structural diagram of a preferred embodiment of a public space new energy ventilation device of the present invention;

2 is a schematic diagram of the closed state of the regulating door of a new energy ventilation device for public space according to the present invention;

3 is a schematic structural diagram of an outdoor bellows of a public space new energy ventilation device of the present invention;

4 is a schematic structural diagram of an indoor bellows of a public space new energy ventilation device of the present invention;

5 is a schematic structural diagram of a partition of a new energy ventilation device for public space according to the present invention;

6 is a schematic structural diagram of a cleaning mechanism of a new energy ventilation device for public spaces according to the present invention;

7 is a schematic structural diagram of a regulating door of a public space new energy ventilation device of the present invention;

FIG. 8 is a schematic structural diagram of a dust collecting device of a public space new energy ventilation device according to the present invention.

Reference numerals: 1, ventilation fan; 2, filter screen; 3, indoor air box; 4, outdoor air box; 5, regulating door; 6, partition plate; 7, vent; 8, motor; 9, rocker arm; 10, connection rod; 11, guide rail; 12, sliding rod; 13, support rod; 14, support seat; 15, filter plate; 16, chute; 17, brush seat; 18, guide rod; 19, connecting plate; 20, slider ;21, rocker; 22, brush plate; 23, filter seam; 24, air inlet duct; 25, air outlet duct; 26, baffle; 27, air inlet; 28, air outlet; 29, scraper; 30, Guide groove; 31, connecting rod; 32, dust box.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments.

As shown in FIG. 1 to FIG. 8 , the present invention provides an embodiment of a new energy ventilation device in a public space, including a ventilation fan 1 and a ventilation duct, the ventilation fan 1 is arranged in the ventilation duct, and the airflow flows along the ventilation duct when the ventilation fan 1 is working It also includes indoor air box 3 and outdoor air box 4. One end of the ventilation duct is connected to the indoor air box 3, and the other end of the ventilation duct is connected to the outdoor air box 4. The outdoor air box 4 is connected to the ventilation duct. It is shielded by the outdoor opening to prevent rain and snow from directly entering the ventilation duct. The indoor bellows 3 is provided with a filter screen 2 at the opening facing the room. The setting of the filter screen 2 can prevent outdoor sundries and mosquitoes from entering the room from the ventilation duct. Keeping the cleanliness of the room, the opening of the outdoor bellows 4 towards the outdoors has an adjustment door 5 and a partition 6, the partition 6 is provided with a ventilation opening 7, and the adjustment door 5 is rotatably installed on the partition 6 corresponding to the ventilation opening 7, When the regulating door 5 is opened, the outdoor air enters the outdoor bellows 4 from the ventilation port 7, and then enters the indoor bellows 3 through the ventilation duct to deliver fresh air into the room. When the regulating door 5 is closed, it can prevent the outdoor air Dust and sundries enter the outdoor bellows 4 to keep the outdoor bellows 4, ventilation ducts and indoor bellows 3 clean. If the outdoor wind pressure is too large or in the event of rain and snow, closing the adjusting door 5 can also prevent damage to the ventilation fan 1 caused by bad weather , and prevent rain and snow from entering the room;

The ventilation duct includes an air inlet duct 24 and an air outlet duct 25. A ventilation fan 1 is installed in the air inlet duct 24 and the air outlet duct 25. The air outlet directions of the two ventilation fans 1 are opposite. The airflow in the duct 25 is accelerated, so that the fresh outdoor air can quickly enter the room from the air inlet duct 24, and the dirty air in the room can be quickly discharged from the air outlet duct 25 to the outside, thereby realizing the exchange of indoor air and outdoor air. 1 has an air inlet 27 and an air outlet 28. The area of the air outlet 28 is smaller than the area of the air inlet 27. When the airflow flows through the ventilation fan 1, the area at the air outlet 28 is smaller, so that the air pressure at the air outlet 28 is higher. The maximum flow rate is faster, so that the airflow can maintain a high-speed flow after flowing out of the ventilation duct, so that the airflow in the air inlet duct 24 can be accelerated by the ventilation fan 1 and can quickly pass through the indoor air box 3 and enter the room. After the ventilation fan 1 is accelerated, it can quickly pass through the outdoor bellows 4 and be discharged to the outdoors. The high-speed airflow also avoids the accumulation of air in the indoor bellows 3 and the outdoor bellows 4, and improves the ventilation effect of indoor and outdoor air.

The outdoor bellows 4 is also provided with a filter plate 15, and the filter plate 15 has a plurality of filter slits 23 arranged in the vertical direction. For example, the filter slit 23 is arranged in the vertical direction, so that the sundries at the filter slit 23 can naturally fall to the bottom along the filter slit 23, which reduces the probability of blockage of the filter plate 15, and the filter plate 15 is fixed on the ventilation duct and the partition 6. A filter cavity is formed between the filter plate 15 and the partition plate 6. When the outdoor air enters the indoor bellows 3 from the vent 7 on the partition plate 6, it will first pass through the filter cavity and be carried by the filter plate 15 to the air. The debris is blocked by the filter to prevent the debris from entering the air inlet duct 24 and causing damage to the ventilation fan 1. The debris filtered by the filter plate 15 accumulates in the filter cavity. The bottom of the filter cavity is provided with a sewage outlet, so that maintenance personnel can regularly open the sewage The port removes the debris accumulated in the filter cavity.

The outdoor bellows 4 is provided with a baffle plate 26. The two sides of the baffle plate 26 form an air inlet cavity and an air outlet cavity. It is set so that after the indoor dirty air is discharged into the outdoor bellows 4 by the air outlet duct 25, it will enter the air outlet cavity, and then pass through the filter plate 15 from the air outlet cavity and then be discharged to the outdoors, while the outdoor fresh air will enter the air inlet through the air inlet cavity. In the air duct 24, it enters the indoor bellows 3 through the air inlet duct 24. At the same time, because the air pressure at the air outlet 28 is higher and the flow velocity is faster, the airflow discharged from the air inlet duct 24 will be directly discharged from the indoor bellows 3 and enter. When entering the room, through the cooperation between the intake duct and the intake cavity and the cooperation between the exhaust duct and the exhaust cavity, the dirty air and fresh air can be circulated respectively, which improves the exchange efficiency of indoor and outdoor air. It prevents the dirty air from being re-inhaled by the air inlet duct 24 when it flows through the outdoor bellows 4, and realizes the separation of fresh air and dirty air. The cavity and the air outlet cavity are shielded, so that when the air flows through the air outlet cavity and the air intake cavity, it needs to pass through the filter plate 15 to filter the air and improve the cleanliness of the air.

It also includes a linkage mechanism and a closing mechanism. The linkage mechanism includes a motor 8, a rocker arm 9 and a connecting rod 10. The motor 8 adopts a biaxial motor 8, and one end of the rocker arm 9 is fixedly connected to the first output shaft of the motor 8. The other end is hinged with the connecting rod 10. The closing mechanism includes a guide rail 11, a sliding rod 12, a supporting rod 13 and a supporting seat 14. The guide rail 11 is fixed on the partition plate 6 in the vertical direction. The rod 12 is slidably installed in the guide rail 11, one end of the support rod 13 is hinged with the slide rod 12, the other end of the support rod 13 is hinged on the support seat 14, and the support seat 14 is fixed on the adjustment door 5. When the adjustment door 5 needs to be opened , start the motor 8, drive the rocker arm 9 to rotate upward through the motor 8, pull the connecting rod 10 to move upward, the connecting rod 10 pulls the sliding rod 12 to move upward along the direction of the guide rail 11, and pulls the support rod 13 to move upward during the upward movement of the sliding rod 12 , the support rod 13 moves up and pushes the support seat 14, so that the support seat 14 drives one side of the adjustment door 5 to move upward, and the other side of the adjustment door 5 is rotatably connected with the partition 6, so that the adjustment door 5 can be connected with The connecting part of the partition plate 6 is rotated upward in the axial direction to complete the opening action of the adjusting door 5; when the adjusting door 5 needs to be closed, the motor 8 is started, and the rocker arm 9 is driven to rotate downward by the motor 8, and the connecting rod 10 is pushed to move downward. , the connecting rod 10 pushes the sliding rod 12 to move downward along the direction of the guide rail 11 . During the downward movement of the sliding rod 12 , the supporting rod 13 is pushed down, and the supporting rod 13 moves down and pulls the supporting seat 14 , so that the supporting seat 14 drives the adjusting door 5 Its connection with the partition 6 is the axis of downward rotation until the adjustment door 5 is fitted with the ventilation opening 7 on the partition 6, and the ventilation opening 7 is closed. The outer surface of the adjustment door 5 is also provided with a solar cell The solar panel and the battery cooperate to provide power for the motor 8 and the ventilation fan 1, so as to achieve the purpose of energy saving.

The outdoor air box 4 is also provided with a cleaning mechanism. The cleaning mechanism is located in the filter cavity. The cleaning mechanism includes a chute 16, a brush seat 17, a guide rod 18, a connecting plate 19, a slider 20 and a rocker 21. One end of the rocker 21 is connected to the The second output shaft of the motor 8 is fixedly connected, the other end of the rocker 21 is hinged on the slider 20, the slider 20 is slidably mounted on the connecting plate 19, one end of the guide rod 18 is fixedly connected with the connecting plate 19, and the The other end passes through the side wall of the outdoor bellows 4 and is fixed on the brush holder 17. The brush holder 17 is slidably installed in the chute 16. The brush holder 17 is fixed with a brush plate 22, and the brush plate 22 has one side of the bristles and the filter. The plate 15 is abutted. During the process of opening and closing the adjusting door 5, the motor 8 drives the rocker 21 to move together with the rocker arm 9 through the second output shaft. When the rocker arm 9 rotates upward, it drives the rocker 21 to rotate upward. When the arm 9 rotates downward, it drives the rocker 21 to rotate downward. Therefore, when the adjusting door 5 is opened and closed, the rocker 21 can drive the slider 20 connected to it to move up and down, and the slider 20 moves up and down to drive the connecting plate 19 to move up and down. When the connecting plate 19 moves, the guide rod 18 drives the brush holder 17 to move, and the movement of the brush holder 17 makes the bristles on the brush holder 17 in contact with the filter plate 15 move along the surface of the filter plate 15, and remove the impurities attached to the filter plate 15. The filter plate 15 can be cleaned before each use, avoiding the need to manually clean the filter plate 15 after long-term storage, and at the same time ensuring the cleaning frequency and cleanliness of the filter plate 15, and improving the quality of indoor air , because the filter cavity is directly connected to the outside world, so the side of the filter plate 15 close to the filter cavity has more debris and dust, and the brush seat 17 is arranged on the side of the filter plate 15 close to the filter cavity to smoothly remove the debris on the filter plate 15. sweep down;

The outdoor bellows 4 is also provided with a dust collecting device. The dust collecting device includes a scraper 29. The scraper 29 is arranged in the filter chamber. Both ends of the scraper 29 are slidably installed in the guide groove 30. The side wall of 4 also includes a connecting rod 31. The two ends of the connecting rod 31 are hinged with the scraper 29 and the brush seat 17 respectively. When the brush seat 17 moves up and down to clean the filter plate 15, the brush seat 17 is driven by the connecting rod 31. The scraper 29 slides along the guide groove 30. When the brush seat 17 moves to the uppermost end, the scraper 29 is close to the filter plate 15. When the brush seat 17 moves downward, the scraper 29 moves from the filter plate 15 to the dust collecting box 32. It moves in the direction and passes through the sewage outlet, the scraper 29 is in contact with the outdoor bellows 4, so as to clean the bottom of the entire filter cavity, and the debris and dust falling on the bottom of the filter cavity are collected by the scraper 29 to the sewage outlet. The sewage outlet is discharged, and a dust collecting box 32 is clamped at the sewage outlet to collect the cleaned debris and dust, so as to prevent dust from accumulating in the filter chamber and blocking the filter plate 15 at the bottom of the filter chamber. The dust box 32 can be removed for cleaning.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Taking the above ideal embodiments according to the present invention as inspiration, and through the above description, relevant personnel can make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the contents in the specification, and the technical scope must be determined according to the scope of the claims.

Claims (9)

1. A new energy ventilation device for public spaces, comprising a ventilation fan (1) and a ventilation duct, wherein the ventilation fan (1) is arranged in the ventilation duct, and is characterized in that: it also includes an indoor air box (3) and an outdoor air box ( 4), one end of the ventilation duct is connected to the indoor bellows (3), and the other end of the ventilation duct is connected to the outdoor bellows (4), and the outdoor bellows (4) has an adjustment door (5) and a partition at the opening facing the outdoors. a plate (6), a vent (7) is provided on the partition (6), and the adjusting door (5) is rotatably mounted on the partition (6) corresponding to the vent (7); Also includes a linkage mechanism and a closing mechanism, the linkage mechanism includes a motor (8), a rocker arm (9) and a connecting rod (10), the motor (8) adopts a biaxial motor (8), the rocker arm (9) ) is fixedly connected with the first output shaft of the motor (8), the other end of the rocker arm (9) is hinged with the connecting rod (10), and the closing mechanism includes a guide rail (11), a sliding rod (12), a support rod (13) and a support seat (14), the guide rail (11) is fixed on the partition plate (6) in the vertical direction, the connecting rod (10) and the sliding rod ( 12) Fixed connection, the sliding rod (12) is slidably installed in the guide rail (11), one end of the supporting rod (13) is hinged with the sliding rod (12), and the The other end is hinged on the support seat (14), the support seat (14) is fixed on the adjustment door (5), and the outer surface of the adjustment door (5) is further provided with a solar cell panel. 2. A new energy ventilation device for public spaces according to claim 1, characterized in that: a filter plate (15) is further provided in the outdoor air box (4), and the filter plate (15) is fixed on the A filter cavity is formed between the ventilation duct and the partition plate (6), and between the filter plate (15) and the partition plate (6). 3. A new energy ventilation device for public spaces according to claim 2, characterized in that: the outdoor bellows (4) is further provided with a cleaning mechanism, the cleaning mechanism is located in the filter cavity, the The cleaning mechanism includes a chute (16), a brush seat (17), a guide rod (18), a connecting plate (19), a slider (20) and a rocker (21), one end of the rocker (21) is connected to the The second output shaft of the motor (8) is fixedly connected, the other end of the rocker (21) is hinged on the slider (20), and the slider (20) is slidably mounted on the connecting plate (19) ), one end of the guide rod (18) is fixedly connected to the connecting plate (19), and the other end of the guide rod (18) passes through the side wall of the outdoor air box (4) and is fixed to the On the brush holder (17), the brush holder (17) is slidably installed in the chute (16), and the brush holder (17) is arranged on the filter plate (15) close to the filter cavity. On one side, a brush plate (22) is fixed on the brush holder (17), and the brush plate (22) has a side with bristles abutting against the filter plate (15). 4 . The new energy ventilation device for public spaces according to claim 3 , wherein the filter plate ( 15 ) has a plurality of filter slits ( 23 ) arranged in the vertical direction. 5 . 5. A new energy ventilation device for public spaces according to claim 4, wherein the ventilation duct comprises an air inlet duct (24) and an air outlet duct (25), and the air inlet duct (24) A ventilation fan (1) is installed in the air outlet duct (25), and the air outlet directions of the two ventilation fans (1) are opposite. 6 . The new energy ventilation device for public spaces according to claim 5 , wherein a baffle plate ( 26 ) is arranged in the outdoor air box ( 4 ), and both sides of the baffle plate ( 26 ) are formed with a baffle plate ( 26 ). 7 . an air inlet cavity and an air outlet cavity, the air inlet duct (24) communicates with the air inlet cavity, the air outlet duct (25) communicates with the air outlet cavity, and the baffle plate (26) communicates with the filter plate (15) )Abut. 7. A new energy ventilation device for public spaces according to claim 6, characterized in that: the ventilation fan (1) has an air inlet (27) and an air outlet (28), and the air outlet (28) has an air outlet (28). The area is smaller than the area of the air inlet (27). 8 . The new energy ventilation device for public spaces according to claim 7 , wherein a filter screen ( 2 ) is provided at the opening of the indoor air box ( 3 ) facing the room. 9 . 9. A new energy ventilation device for public spaces according to claim 8, characterized in that: a dust collecting device is further provided, the dust collecting device comprises a scraper (29), and the scraper (29) is provided with In the filter cavity, both ends of the scraper (29) are slidably installed in the guide groove (30), the guide groove (30) is horizontally fixed on the side wall of the outdoor air box (4), and also includes a connecting rod ( 31), the two ends of the connecting rod (31) are respectively hinged with the scraper (29) and the brush seat (17), and the brush seat (17) drives the scraper (29) through the connecting rod (31). ) slides along the guide groove (30), the scraper (29) is in contact with the outdoor air box (4), the bottom of the filter cavity is provided with a sewage outlet, and the sewage outlet is clamped with a dust collecting box ( 32).

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