Air pipe structure of fresh air system

Abstract

The utility model relates to an air duct structure of a fresh air system, which comprises a ventilating duct, two ends of the ventilating duct are both provided with elbows, one ends of the two elbows far away from the ventilating duct are respectively provided with an air inlet pipe and an air outlet pipe, and an air duct is arranged in the air inlet pipe. The utility model relates to the technical field of fresh air system air pipes. According to the air pipe structure of the fresh air system, when large wind force exists outside, the pressure generated by the outside wind pushes the air guide plate to enable the sleeve connected with the air guide plate to rotate, at the moment, the sealing plate connected with the sleeve also rotates along with the air guide plate, so that the sealing plate seals the sealing hole, and due to the fact that the sealing plate is attached to the sealing end, the sealing effect is good. Therefore, when the sealing plate rotates and the sealing hole is closed, a complete sealing effect can be achieved, so that the effect of effectively preventing air and sand from entering the air guide barrel can be achieved, and an air supply fan and a ventilation pipeline can be effectively protected in windy and sandy weather.

Description

Technical Field

[0001] The utility model relates to the technical field of air ducts for fresh air systems, in particular to an air duct structure for fresh air systems. Background Art

[0002] Air ducts are commonly used in the field of ventilation and air conditioning. The main function of air ducts is to distribute processed hot and cold air from air conditioning equipment to various areas of the building to achieve temperature regulation and air circulation. Air ducts also improve indoor air quality by removing pollutants from the air, controlling humidity and supplying fresh air.

[0003] Air ducts are usually made of metal or plastic and come in different shapes and sizes. They can be round, square or rectangular and are designed and installed according to the specific air conditioning system requirements.

[0004] In the prior art, since the fresh air system exists in the pipe opening connected to the outside world and is used to replace the indoor air, when the outside wind and sand are strong, the fresh air system is also prone to a large amount of wind and sand entering when it is not turned on, which in turn causes the wind and sand to enter the room through the pipe, thereby causing indoor air pollution.

[0005] Moreover, when the fresh air system is used under normal conditions, it is easy for the fresh air system to have direct blowing problems, and the direct blowing air path can easily cause damage to the human body after coming into contact with the human body. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an air duct structure for a fresh air system so as to solve the technical problems mentioned in the above background technology.

[0007] The above technical objectives of the utility model are achieved through the following technical solutions:

[0008] A fresh air system duct structure, comprising a ventilation duct, wherein both ends of the ventilation duct are provided with bent pipes, and ends of the two bent pipes away from the ventilation duct are respectively provided with an air inlet pipe and an air outlet pipe, an air guide cylinder is provided inside the air inlet pipe, an arc-shaped air guide plate is provided on the inner wall of the air guide cylinder, a closed end is provided on one side of the air guide cylinder, a plurality of closed holes are opened on the closed end, a rotating shaft is provided in the middle of the closed end, and a closing mechanism is fixedly installed on one end of the rotating shaft;

[0009] A mounting bracket is arranged at one end of the air outlet pipe away from the bent pipe, a connecting shaft is rotatably mounted inside the mounting bracket, and a pressure relief mechanism is arranged at one end of the connecting shaft.

[0010] Furthermore, the closing mechanism includes a sleeve, which is fixedly mounted on one end of the rotating shaft, and the outer peripheral wall of the sleeve is provided with a closing plate corresponding to the closed hole one by one, the back side of the closing plate is in contact with the closed end, and the outer surface of the sleeve is fixedly provided with an air guide plate at a position corresponding to the closing plate.

[0011] Furthermore, a positioning groove is provided at a top corner of one side of the closing plate, and a limiting block is provided at a position corresponding to the positioning groove of the closing end. When the closing plate completely covers the closing hole, the limiting block is inserted into the positioning groove.

[0012] Furthermore, a spring groove is provided at one end of the rotating shaft inserted into the air guide tube, a torsion spring is arranged inside the spring groove, a fixing lock embedded in the closed end is provided at one end of the torsion spring, and a spring fixing plate fixedly connected to the rotating shaft is provided at one end of the torsion spring away from the fixing lock.

[0013] Furthermore, the mounting bracket includes a positioning shaft cylinder, the axis of the positioning shaft cylinder is in the same straight line as the axis of the air outlet pipe, and the outer side wall of the positioning shaft cylinder is provided with a plurality of support rods arranged in a circular array.

[0014] Furthermore, a sliding groove is provided at a position of the inner wall of the air outlet pipe corresponding to the support rod, a sliding block is provided inside the sliding groove, and the sliding block is fixedly connected to the support rod.

[0015] Furthermore, the pressure relief mechanism includes a conical platform, the side wall of the conical platform is a concave arc surface, the conical platform is fixedly connected to the connecting shaft, the outer wall of the conical platform is fixedly provided with a plurality of evenly distributed spiral blades, and the diameter of the cone bottom surface of the conical platform is equal to the diameter of the outer tube wall of the air outlet pipe.

[0016] In summary, the present invention includes at least one of the following beneficial technical effects:

[0017] 1. In the air duct structure of the fresh air system, when there is a large wind force outside, the pressure generated by the outside wind pushes the air guide plate to rotate the sleeve connected to the air guide plate, and at this time, the closing plate connected to the sleeve will also rotate accordingly, so that the closing plate blocks the closing hole, and because the closing plate fits the closing end, after the closing plate rotates and closes the closing hole, a complete sealing effect can be achieved, thereby effectively preventing air and wind and sand from entering the interior of the air guide tube, thereby effectively protecting the air supply fan and the ventilation duct in windy and sandy weather;

[0018] 2. In the air duct structure of the fresh air system, since the diameter of the cone bottom surface of the cone table is equal to the diameter of the outer tube wall of the air outlet pipe, when the distance between the cone table and the pipe mouth of the air outlet pipe is close, the air outlet diameter of the air outlet pipe becomes smaller, and thus the pressure of the exhausted air becomes larger, thereby increasing the distance for the fresh air to be exhausted and achieving the purpose of improving the ventilation efficiency. In addition, through the setting of the spiral blades, the air is dispersed when it is discharged through the air outlet pipe, so that the air exhaust area is increased, so as to improve the ventilation efficiency while reducing the impact of the air on the human body, thereby achieving the effect of reducing the impact on the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 The utility model is a structural schematic diagram of a fresh air system air duct structure.

[0021] Figure 2 The utility model is a structural schematic diagram of an air inlet duct of a fresh air system air duct structure.

[0022] Figure 3 It is a structural schematic diagram of an air inlet of an air inlet duct of an air duct structure of a fresh air system of the utility model.

[0023] Figure 4 The utility model is a schematic diagram of the internal structure of an air inlet duct of a fresh air system air duct structure.

[0024] Figure 5 The utility model is a structural schematic diagram of an air outlet duct of a fresh air system air duct structure.

[0025] Figure 6 The utility model is a structural schematic diagram of a pressure relief mechanism of an air duct structure of a fresh air system.

[0026] In the figure, 1, ventilation duct; 2, elbow; 3, air inlet pipe; 4, air outlet pipe; 5, air guide tube; 6, arc-shaped air guide plate; 7, closed end; 8, closed hole; 9, rotating shaft; 91, spring groove; 92, torsion spring; 93, fixing lock; 94, spring fixing plate; 10, closing mechanism; 101, sleeve; 102, closing plate; 103, air guide plate; 104, positioning groove; 105, limit block; 11, mounting bracket; 111, positioning shaft cylinder; 112, support rod; 113, sliding groove; 114, sliding block; 12, connecting shaft; 13, pressure relief mechanism; 131, conical table; 132, spiral blade. DETAILED DESCRIPTION

[0027] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0028] Example:

[0029] Reference Figure 1-Figure 6 The utility model discloses a duct structure of a fresh air system, comprising a ventilation duct 1, wherein both ends of the ventilation duct 1 are provided with a bent pipe 2, and the ends of the two bent pipes 2 away from the ventilation duct 1 are respectively provided with an air inlet pipe 3 and an air outlet pipe 4, wherein an air guide cylinder 5 is provided inside the air inlet pipe 3, and an arc-shaped air guide sheet 6 is provided on the inner wall of the air guide cylinder 5, and a closed end 7 is provided on one side of the air guide cylinder 5, wherein a plurality of closed holes 8 are opened on the closed end 7, and a rotating shaft 9 is provided in the middle of the closed end 7, and a closing mechanism 10 is fixedly installed on one end of the rotating shaft 9;

[0030] A mounting bracket 11 is provided at one end of the air outlet pipe 4 away from the elbow 2 , a connecting shaft 12 is rotatably mounted inside the mounting bracket 11 , and a pressure relief mechanism 13 is provided at one end of the connecting shaft 12 .

[0031] In this embodiment, a fresh air duct that connects the indoor environment with the outside world is formed by the ventilation duct 1, two elbows 2, an air inlet duct 3 and an air outlet duct 4. Here, there is one ventilation duct 1 and two elbows 2, or other numbers. An air supply fan is provided inside the ventilation duct 1.

[0032] When in use, the air supply fan sucks fresh air from the outside into the ventilation duct 1 through the air inlet pipe 3, and then discharges it into the room through the air outlet pipe 4, so as to achieve the effect of ventilating the room. When the air is discharged through the air outlet pipe 4, the wind speed is depressurized by the setting of the pressure relief mechanism 13, so that the air flow is more dispersed, so as to achieve rapid air diffusion, and effectively avoid direct air blowing to indoor residents, so as to avoid physical discomfort such as headache caused by direct air blowing;

[0033] At the same time, when the air supply fan inhales air, the air first enters the air guide tube 5 through the closed hole 8, and then the flow of air drives the arc-shaped air guide plate 6 to rotate, thereby causing the closed hole 8 to rotate, driving the closing mechanism 10 to rotate, and preventing the closing mechanism 10 from being blocked by the pressure generated when the air is inhaled;

[0034] When there is strong wind and sand outside, the external wind force generates pressure on the closing mechanism 10, causing the closing mechanism 10 to rotate, and then the closing hole 8 is blocked by the closing mechanism 10, so that air cannot enter the interior of the air inlet pipe 3, thereby preventing wind and sand from entering the ventilation duct 1, thereby protecting the ventilation duct 1 and the air supply fan.

[0035] In a further preferred embodiment of the present invention, Figure 1-6 As shown, the closing mechanism 10 includes a sleeve 101, which is fixedly mounted on one end of the rotating shaft 9. The outer peripheral wall of the sleeve 101 is provided with a closing plate 102 corresponding to the closing hole 8 one by one. The back side of the closing plate 102 is in contact with the closing end 7. The outer surface of the sleeve 101 is fixedly provided with an air guide plate 103 at a position corresponding to the closing plate 102.

[0036] In this embodiment, the sleeve 101 is provided to install the closing plate 102 and the air guide plate 103, and since the positions of the closing plates 102 and the closing holes 8 correspond one to one, the closing plates 102 can simultaneously block the closing holes 8, so that the closing end 7 is sealed to prevent air from entering.

[0037] Specifically, when there is strong wind outside, the pressure generated by the external wind pushes the wind guide plate 103 to rotate the sleeve 101 connected to the wind guide plate 103, and the closing plate 102 connected to the sleeve 101 will also rotate accordingly, so that the closing plate 102 blocks the closing hole 8, and because the closing plate 102 fits the closing end 7, after the closing plate 102 rotates and closes the closing hole 8, a completely closed effect can be achieved, thereby effectively preventing air and sand from entering the interior of the air guide tube 5, thereby effectively protecting the air supply fan and the ventilation duct 1 in windy and sandy weather.

[0038] In a further preferred embodiment of the present invention, Figure 1-6 As shown, a positioning groove 104 is opened at the top corner of one side of the closing plate 102, and a limiting block 105 is set at the position of the closing end 7 corresponding to the positioning groove 104. When the closing plate 102 completely covers the closing hole 8, the limiting block 105 is inserted into the interior of the positioning groove 104.

[0039] In this embodiment, by setting the positioning groove 104 and the limiting block 105, when the closing plate 102 blocks the closing hole 8, the limiting block 105 is inserted into the interior of the positioning groove 104. At this time, in conjunction with the wind pressure, the closing plate 102 is fixed at the closing hole 8, thereby blocking the closing hole 8 to prevent air and wind sand from entering the interior of the air guide tube 5.

[0040] When the fresh air system is in normal use, since the limit block 105 is a raised block, the limit block 105 can support the side of the closing plate 102 away from the positioning groove 104, as shown in the figure, effectively improving the stability of the closing mechanism 10, so that the closing mechanism 10 can rotate with the rotation of the guide cylinder to prevent the closing mechanism 10 from blocking the closing hole 8 when the fresh air system is in normal use.

[0041] In a further preferred embodiment of the present invention, Figure 1-6 As shown, a spring groove 91 is provided at one end of the rotating shaft 9 inserted into the air guide tube 5, a torsion spring 92 is arranged inside the spring groove 91, a fixing lock 93 embedded in the closed end 7 is provided at one end of the torsion spring 92, and a spring fixing sheet 94 fixedly connected to the rotating shaft 9 is provided at the end of the torsion spring 92 away from the fixing lock 93.

[0042] In this embodiment, the spring groove 91 is provided for installing the spring, and the fixing lock 93 and the spring fixing plate 94 are provided for fixing the two ends of the torsion spring 92 to the closed end 7 and the rotating shaft 9 respectively. Then, when the closing mechanism 10 is affected by the wind pressure and closes the closed hole 8, the torsion spring 92 is twisted to accumulate potential energy. After the external wind force decreases, the closing mechanism 10 can rebound through the rebound of the torsion spring 92 to contact the closed hole 8, thereby achieving the effect of connecting the air guide tube 5 with the outside world.

[0043] In a further preferred embodiment of the present invention, Figure 1-6 As shown, the mounting bracket 11 includes a positioning shaft cylinder 111 , the axis of the positioning shaft cylinder 111 is in the same straight line as the axis of the air outlet pipe 4 , and a plurality of support rods 112 are arranged in a circular array on the outer wall of the positioning shaft cylinder 111 .

[0044] In this embodiment, the installation bracket 11 and the positioning shaft cylinder 111 are used to install the connecting shaft 12, and the connecting shaft 12 is used to install the pressure relief mechanism 13. The support rod 112 is used to fix the position of the positioning shaft cylinder 111 to improve the stability of the device.

[0045] In a further preferred embodiment of the present invention, Figure 1-6 As shown, a sliding groove 113 is provided at a position of the inner wall of the air outlet pipe 4 corresponding to the support rod 112 , a sliding block 114 is provided inside the sliding groove 113 , and the sliding block 114 is fixedly connected to the support rod 112 .

[0046] In this embodiment, by setting the sliding groove 113 and the sliding block 114, the position of the mounting bracket 11 inside the air outlet pipe 4 can be adjusted, thereby adjusting the distance between the pressure relief mechanism 13 and the pipe opening of the air outlet pipe 4, thereby achieving the effect of controlling the air pressure discharged from the air outlet pipe 4.

[0047] In a further preferred embodiment of the present invention, Figure 1-6 As shown, the pressure relief mechanism 13 includes a conical platform 131, the side wall of the conical platform 131 is a concave arc surface, the conical platform 131 is fixedly connected to the connecting shaft 12, and the outer wall of the conical platform 131 is fixedly provided with a plurality of evenly distributed spiral blades 132, and the diameter of the cone bottom surface of the conical platform 131 is equal to the diameter of the outer tube wall of the air outlet pipe 4.

[0048] In the present embodiment, since the diameter of the conical bottom surface of the conical platform 131 is equal to the diameter of the outer tube wall of the air outlet pipe 4, when the distance between the conical platform 131 and the tube mouth of the air outlet pipe 4 is close, the air outlet diameter of the air outlet pipe 4 becomes smaller, and thus the pressure of the exhausted air becomes larger, thereby achieving the purpose of increasing the distance for fresh air to be exhausted, and improving the ventilation efficiency. In addition, by setting the spiral blades 132, the air is dispersed when it is discharged through the air outlet pipe 4, so that the air exhaust area is increased, so as to improve the ventilation efficiency while reducing the impact of the air on the human body, thereby achieving the effect of reducing the impact on the human body.

[0049] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A fresh air system duct structure, comprising a ventilation duct (1), wherein both ends of the ventilation duct (1) are provided with bent pipes (2), and ends of the two bent pipes (2) away from the ventilation duct (1) are respectively provided with an air inlet pipe (3) and an air outlet pipe (4), wherein: An air guide tube (5) is provided inside the air inlet pipe (3), an arc-shaped air guide plate (6) is provided on the inner wall of the air guide tube (5), a closed end (7) is provided on one side of the air guide tube (5), a plurality of closed holes (8) are provided on the closed end (7), a rotating shaft (9) is provided in the middle of the closed end (7), and a closing mechanism (10) is fixedly mounted on one end of the rotating shaft (9); An installation bracket (11) is provided at one end of the air outlet pipe (4) away from the bent pipe (2), a connecting shaft (12) is rotatably mounted inside the installation bracket (11), and a pressure relief mechanism (13) is provided at one end of the connecting shaft (12).

2. A fresh air system air duct structure according to claim 1, characterized in that: The closing mechanism (10) comprises a sleeve (101), the sleeve (101) being fixedly mounted on one end of the rotating shaft (9), the outer peripheral wall of the sleeve (101) being provided with a closing plate (102) corresponding one to one with the closing hole (8), the back side of the closing plate (102) being in contact with the closing end (7), and an air guide plate (103) being fixedly provided on the outer surface of the sleeve (101) at a position corresponding to the closing plate (102).

3. A fresh air system air duct structure according to claim 2, characterized in that: A positioning groove (104) is provided at a top corner of one side of the closing plate (102), and a limiting block (105) is provided at a position of the closing end (7) corresponding to the positioning groove (104); when the closing plate (102) completely covers the closing hole (8), the limiting block (105) is inserted into the positioning groove (104).

4. A fresh air system air duct structure according to claim 3, characterized in that: One end of the rotating shaft (9) inserted into the air guide tube (5) is provided with a spring groove (91), a torsion spring (92) is arranged inside the spring groove (91), one end of the torsion spring (92) is provided with a fixing lock (93) embedded in the closed end (7), and one end of the torsion spring (92) away from the fixing lock (93) is provided with a spring fixing sheet (94) fixedly connected to the rotating shaft (9).

5. The air duct structure of the fresh air system according to claim 4, characterized in that: The mounting bracket (11) comprises a positioning shaft cylinder (111), the axis of the positioning shaft cylinder (111) and the axis of the air outlet pipe (4) are on the same straight line, and the outer wall of the positioning shaft cylinder (111) has a plurality of support rods (112) arranged in a circular array.

6. A fresh air system air duct structure according to claim 5, characterized in that: A sliding groove (113) is provided at a position of the inner wall of the air outlet pipe (4) corresponding to the support rod (112), a sliding block (114) is provided inside the sliding groove (113), and the sliding block (114) is fixedly connected to the support rod (112).

7. A fresh air system air duct structure according to claim 6, characterized in that: The pressure relief mechanism (13) comprises a conical platform (131), the side wall of the conical platform (131) is an inwardly concave arc surface, the conical platform (131) is fixedly connected to the connecting shaft (12), a plurality of evenly distributed spiral blades (132) are fixedly provided on the outer wall of the conical platform (131), and the diameter of the conical bottom surface of the conical platform (131) is equal to the diameter of the outer tube wall of the air outlet pipe (4).

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