Ventilation equipment capable of preventing air return

Abstract

The ventilation equipment capable of preventing air return comprises a main body and an air baffle, a first air duct is arranged in the main body, one end of the first air duct penetrates out of the main body, a cover plate is installed at one end of the first air duct, a first installation groove is formed in the cover plate, a first ventilation opening is formed in the cover plate, and a second air duct is arranged in the main body. The second air duct is located in the center of the first air duct, one end of the second air duct communicates with the first air duct, the other end of the second air duct penetrates out of the body, a wind power assembly is installed in the second air duct, one end of the wind shield extends to form a connecting shaft, the connecting shaft is slidably connected with the first installation groove, and the other end of the wind shield is close to the edge of one end of the second air duct. A third air duct is arranged in the body, one end of the third air duct penetrates out of the body, and the other end of the first air duct is communicated with the third air duct. The utility model provides ventilation equipment capable of preventing air return. The problem that outdoor strong wind blows indoor exhausted air back into a room through the ventilation equipment is solved.

Description

Technical Field

[0001] The utility model relates to the field of ventilation equipment, in particular to a ventilation equipment for preventing air return. Background Art

[0002] When the indoor space is too large, the air flow indoors is particularly important. It is necessary to use ventilation equipment to discharge the dirty air indoors, and then use air filtration equipment to inject the purified air into the room to achieve the circulation of new and old air indoors and promote the air flow indoors.

[0003] However, when the ventilation equipment discharges the dirty air, when the outdoor wind force is too strong, the strong outdoor wind will blow the dirty air back into the room through the ventilation equipment, which instead reduces the indoor air quality. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a ventilation equipment for preventing air return, and solve the problem that the strong outdoor wind blows the air discharged indoors back into the room through the ventilation equipment.

[0005] The technical solution adopted by the ventilation equipment for preventing air return disclosed by the utility model is as follows:

[0006] It includes a main body and a wind shield. A first air duct is arranged in the main body. One end of the first air duct penetrates out of the main body. A cover plate is installed at one end of the first air duct. A first installation groove is opened on the cover plate. A first ventilation opening is opened on the cover plate. A second air duct is arranged in the main body. The second air duct is located at the center of the first air duct. One end of the second air duct is communicated with the first air duct. The other end of the second air duct penetrates out of the main body. A wind force component is installed in the second air duct. One end of the wind shield extends with a connecting shaft. The connecting shaft is slidably connected with the first installation groove. The other end of the wind shield is close to the edge of one end of the second air duct. A third air duct is arranged in the main body. One end of the third air duct penetrates out of the main body. The other end of the first air duct is communicated with the third air duct.

[0007] As a preferred solution, a second installation groove is opened at one end of the connecting shaft. A spring is arranged in the second installation groove. Two ends of the spring respectively abut against the bottom of the first installation groove and the bottom of the second installation groove.

[0008] As a preferred solution, the wind shield is in a bowl-shaped structure. The connecting shaft is located inside the bowl of the wind shield.

[0009] As a preferred solution, there are multiple first ventilation openings on the cover plate. The multiple first ventilation openings are arranged at intervals around the center of the cover plate. The first installation groove is located at the center of the cover plate.

[0010] As a preferred solution, one end of the second air duct extends outward to form a horn-shaped annular closing opening, and the annular closing opening abuts against the outer wall of the bowl of the wind baffle.

[0011] As a preferred solution, a plurality of gaps arranged at intervals are formed in the annular closing opening.

[0012] As a preferred solution, a plurality of second ventilation openings arranged at intervals are formed in the inner wall of the first air duct, and the first air duct is communicated with the third air duct through the second ventilation openings.

[0013] The beneficial effects of a ventilation device for preventing air return disclosed by the present utility model are as follows:

[0014] When the ventilation device is installed on the indoor wall, one end of the first air duct is located outdoors, and the other end of the second air duct is located indoors. When the wind power assembly is started, the indoor air is introduced into the first air duct from the second air duct. The indoor air pushes the connecting shaft of the wind baffle to slide in the first installation groove, so that the gap between the wind baffle and the second air duct becomes wider, allowing the indoor air to quickly pass through the gap and the first air duct and be discharged from the first ventilation opening;

[0015] When strong wind blows outdoors and the strong wind outdoors is reversed and poured into the first air duct, since the intensity of the wind energy generated by the wind power assembly is lower than the intensity of the strong wind outdoors, the strong wind outdoors pushes the connecting shaft of the wind baffle to slide in the first installation groove in the reverse direction, so that the gap between the wind baffle and the second air duct becomes narrower, causing the wind energy generated by the wind power assembly to form a venturi effect when passing through the narrowed gap, enhancing the flow rate of the wind energy generated by the wind power assembly when passing through the gap, and preventing the strong wind outdoors from entering the room through the second air duct;

[0016] The strong wind outdoors entering the first air duct can be guided into the third air duct, and the strong wind outdoors entering the first air duct is dredged through the third air duct. The air discharged from the second air duct indoors can also be led from the first air duct to the third air duct and discharged under the drive of the strong wind outdoors, enabling the ventilation device to continue discharging the indoor air against the strong wind outdoors without the problem of air being reversed and poured into the room. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of a ventilation device for preventing air return of the present utility model.

[0018] Figure 2 is an installation schematic diagram of a ventilation device for preventing air return of the present utility model.

[0019] Figure 3 is a sectional view of a ventilation device for preventing air return of the present utility model.

[0020] Figure 4 is a schematic diagram of the operation of the wind baffle of a ventilation device for preventing air return of the present utility model (sectional view). DETAILED DESCRIPTION

[0021] The present invention is further described and illustrated below in conjunction with specific embodiments and accompanying drawings:

[0022] Please refer to Figures 1-4 .

[0023] The utility model discloses a ventilation device for preventing backflow, comprising a main body 1 and a wind shield 4;

[0024] In this embodiment, the main body 1 is preferably a cylinder; a first air duct 2 is provided in the main body 1. In this embodiment, the first air duct 2 is a cylindrical structure, one end of the first air duct 2 passes through one end of the main body 1, and a male thread is provided on the inner wall of the first air duct 2, and the male thread is close to one end of the first air duct 2;

[0025] Further, a cover plate 21 is detachably mounted on one end of the first air duct 2, and a female thread is provided on the outer side of the cover plate 21, and the male thread is matched with the female thread; a first mounting groove 211 is provided on the cover plate 21, and the first mounting groove 211 is located in the first air duct 2, and the first mounting groove 211 is located at the center of the cover plate 21; a first vent 212 is provided on the cover plate 21, and in this embodiment, four first vents 212 are preferably arranged around the center of the cover plate 21, and the air in the first air duct 2 can be discharged from the first vent 212;

[0026] Furthermore, a plurality of second vents 22 arranged at intervals are provided on the inner wall of the first air duct 2 , the plurality of second vents 22 surround the inner wall of the first air duct 2 , and the second vents 22 penetrate the first air duct 2 .

[0027] A second air duct 3 is provided in the main body 1. In this embodiment, the second air duct 3 is preferably a cylindrical structure; the second air duct 3 is located at the center of the first air duct 2, the second air duct 3 is close to the other end of the first air duct 2, one end of the second air duct 3 is connected to the first air duct 2, and the other end of the second air duct 3 passes through the other end of the main body 1;

[0028] Furthermore, one end of the second air duct 3 extends outwardly to form a trumpet-shaped annular closing, and a plurality of gaps arranged at intervals are formed on the annular closing. In this embodiment, preferably, there are four gaps.

[0029] Furthermore, a wind power component 31 is installed in the second air duct 3, and the wind power component 31 includes a bracket, a motor and fan blades; the bracket is fixedly connected to the inner wall of the second air duct 3, and the bracket does not interfere with the ventilation of the second air duct 3; the motor is fixedly connected to the bracket, and the fan blades are fixedly connected to the output shaft of the motor, and the fan blades are driven to rotate by the output shaft of the motor, so that air is sucked in from the other end of the second air duct 3 and discharged into the first air duct 2 from one end of the second air duct 3.

[0030] In this embodiment, it is preferred that the wind deflector 4 has a bowl-shaped structure. One end of the wind deflector 4 extends with a connecting shaft 41. The connecting shaft 41 is located inside the bowl of the wind deflector 4. The connecting shaft 41 is slidably connected to the first installation groove 211. One end of the connecting shaft 41 is provided with a second installation groove 411. A spring 42 is arranged in the second installation groove 411. Two ends of the spring 42 respectively abut against the bottom of the first installation groove 211 and the bottom of the second installation groove 411. By the spring 42 pushing the connecting shaft 41 of the wind deflector 4 to slide in the first installation groove 211, the other end of the wind deflector 4 approaches the edge of one end of the second air duct 3, and the annular closing part abuts against the outer wall of the bowl of the wind deflector 4; when the wind power assembly 31 stops operating, the spring 42 pushes the connecting shaft 41 of the wind deflector 4 to slide in the first installation groove 211, so that the annular closing part abuts against the outer wall of the bowl of the wind deflector 4, sealing one end of the second air duct 3, preventing the outdoor air from entering the room through the second air duct 3, and achieving the effect of preventing air return.

[0031] A third air duct 5 is arranged in the main body 1. In this embodiment, it is preferred that the third air duct 5 has a circular ring structure. The first air duct 2 is located inside the third air duct 5. One end of the third air duct 5 penetrates out from the outside of one end of the main body 1. The first air duct 2 is communicated with the third air duct 5 through the second ventilation opening 22.

[0032] During installation, this ventilation device is installed on the indoor wall. One end of the first air duct 2 is communicated with the outside, and the other end of the second air duct 3 is communicated with the inside of the room;

[0033] When the outdoor wind is weak, the output shaft of the motor drives the fan blades to rotate, sucking the indoor air from the other end of the second air duct 3 and discharging it into the first air duct 2 from one end of the second air duct 3. During the process that the air in the second air duct 3 enters the first air duct 2, the thrust formed by the fan blades driving the air pushes the connecting shaft 41 of the wind deflector 4 to slide in the first installation groove 211, making the gap between the wind deflector 4 and the second air duct 3 wider, allowing the dirty air to quickly enter the first air duct 2, and the indoor air passes through the first ventilation opening 212 of the cover plate 21 and is discharged from the first air duct 2;

[0034] When a strong wind blows outdoors and the strong outdoor wind pours into the first air duct 2, the strong outdoor wind entering the first air duct 2 can be guided into the third air duct 5. By the third air duct 5 dredging the strong outdoor wind entering the first air duct 2, the intensity of the strong outdoor wind rushing into the second air duct 3 can be weakened;

[0035] Since the intensity of the wind energy generated by the wind power component 31 is lower than that of the strong outdoor wind, the strong outdoor wind pushes the connecting shaft 41 of the wind deflector 4 to slide in the first installation groove 211 in the reverse direction, narrowing the gap between the wind deflector 4 and the second air duct 3. This causes the wind energy generated by the wind power component 31 to form a venturi effect when entering the first air duct 2 from the second air duct 3, enhancing the flow rate of the wind energy generated by the wind power component 31 when passing through the gap, improving the resistance to the impact of the strong outdoor wind entering the second air duct 3, and preventing the strong outdoor wind from entering the room through the second air duct 3. During the process of guiding the air from the first air duct 2 to the third air duct 5 for discharge, the air discharged from the second air duct 3 indoors can also be driven by the strong outdoor wind and enter the third air duct 5 for discharge, enabling this ventilation device to continue discharging the dirty indoor air against the strong outdoor wind without the problem of air flowing back into the room.

[0036] When the strong outdoor wind pushes the wind deflector 4 into contact with the annular closing opening, the wind deflector 4 seals one end of the second air duct 3, and the air in the second air duct 3 can also discharge the indoor air into the first air duct 2 through the notch.

[0037] The utility model provides a ventilation device for preventing air return. This ventilation device is installed on the indoor wall. One end of the first air duct is located outdoors, and the other end of the second air duct is located indoors. When the wind power component is activated, the indoor air is introduced from the second air duct into the first air duct. The indoor air pushes the connecting shaft of the wind deflector to slide in the first installation groove, widening the gap between the wind deflector and the second air duct, enabling the indoor air to quickly pass through the gap and the first air duct and be discharged from the first ventilation opening.

[0038] When a strong outdoor wind blows and the strong outdoor wind reversely flows into the first air duct, since the intensity of the wind energy generated by the wind power component is lower than that of the strong outdoor wind, the strong outdoor wind pushes the connecting shaft of the wind deflector to slide in the first installation groove in the reverse direction, narrowing the gap between the wind deflector and the second air duct. This causes the wind energy generated by the wind power component to form a venturi effect when passing through the narrowed gap, enhancing the flow rate of the wind energy generated by the wind power component when passing through the gap and preventing the strong outdoor wind from entering the room through the second air duct.

[0039] The strong outdoor wind entering the first air duct can be guided into the third air duct. The third air duct dredges the strong outdoor wind entering the first air duct. The air discharged from the second air duct indoors can also be driven by the strong outdoor wind, guided from the first air duct to the third air duct for discharge, enabling this ventilation device to continue discharging the indoor air against the strong outdoor wind without the problem of air flowing back into the room.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the present utility model. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present utility model.

Claims

1. A ventilation device for preventing air return, characterized in that It includes a main body and a wind shield. A first air duct is provided inside the main body. One end of the first air duct penetrates the main body. A cover plate is installed at one end of the first air duct. A first installation groove is formed on the cover plate, and a first ventilation opening is formed on the cover plate. A second air duct is provided inside the main body. The second air duct is located at the center of the first air duct. One end of the second air duct is communicated with the first air duct. The other end of the second air duct penetrates the main body. A wind power assembly is installed inside the second air duct. One end of the wind shield extends with a connecting shaft. The connecting shaft is slidably connected with the first installation groove. The other end of the wind shield is close to the edge of one end of the second air duct. A third air duct is provided inside the main body. One end of the third air duct penetrates the main body. The other end of the first air duct is communicated with the third air duct.

2. The ventilation device for preventing air return according to claim 1, characterized in that, A second installation groove is formed at one end of the connecting shaft. A spring is provided inside the second installation groove. Two ends of the spring respectively abut against the bottom of the first installation groove and the bottom of the second installation groove.

3. The ventilation device for preventing air return according to claim 2, characterized in that, The wind shield is of a bowl-shaped structure. The connecting shaft is located inside the bowl of the wind shield.

4. The ventilation device for preventing air return according to claim 3, characterized in that, There are multiple first ventilation openings on the cover plate. The multiple first ventilation openings are arranged at intervals around the center of the cover plate. The first installation groove is located at the center of the cover plate.

5. The ventilation device for preventing air return according to claim 4, characterized in that, One end of the second air duct extends outwards with a horn-shaped annular closing opening. The annular closing opening abuts against the outer wall of the bowl of the wind shield.

6. The ventilation device for preventing air return according to claim 5, wherein Multiple gaps arranged at intervals are formed on the annular closing opening.

7. The ventilation device for preventing air return according to claim 6, characterized in that, Multiple second ventilation openings arranged at intervals are formed on the inner wall of the first air duct. The first air duct is communicated with the third air duct through the second ventilation openings.

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