An unpowered ventilation device

Abstract

The utility model provides a kind of unpowered ventilation device, including first ventilation area and second ventilation area, and is equipped with exhaust duct between the first ventilation area and second ventilation area;The second ventilation area is coaxially arranged with first ventilation area, and the top of second ventilation area is communicated with exhaust duct;The first ventilation area is equipped with several wind deflector bending along the set direction, and wind deflector is spaced apart, and interval area forms ambient wind inlet and ambient wind outlet, the wind deflector and interval area are used to change the flow direction of ambient wind, ambient wind outlet is communicated with exhaust duct, and the area of ambient wind inlet is greater than the area of ambient wind outlet, to form negative pressure in exhaust duct and then drive second ventilation area to generate exhaust driving force.The utility model has no moving parts, no noise during operation, can have the same life as building, and can also generate suction force in breeze, without the problem of backflow.

Description

Technical Field

[0001] This utility model belongs to the technical field of ventilation devices, specifically relating to a non-powered ventilation device. Background Technology

[0002] To address indoor air circulation and promptly remove toxic gases generated during fires, exhaust fans and ventilators have been widely used on the roofs of steel structure factory buildings and residential buildings. However, exhaust fans and ventilators require power, resulting in high operating costs. To address this, utility model patent application number 200820152745.X discloses a turbine ventilator. In this turbine ventilator, a top cover is connected to the top of a cylindrical body, and a bracket connects the bottom of the cylindrical body to a bottom ring. The central axis of the cylindrical body corresponds to the central axis of the top cover and the bottom ring. Multiple guide vanes are arranged in parallel along the entire outer circumference between the top cover and the bottom ring, forming the turbine head. A bracket connects the bottom of a cylindrical body to the top of a tubular base, with the central axis of the cylindrical body corresponding to the central axis of the tubular base. The cylindrical body is placed inside the cylindrical body and connected by bearings, thus forming a structure where the turbine head can rotate relative to the tubular base. This type of turbine ventilator can rotate on its own, driven by natural horizontal wind or by vertical wind caused by air convection due to indoor and outdoor air pressure differences. It does not require power support, reducing operating costs and can be used as a ventilation device.

[0003] However, in actual use, when the outdoor wind speed is low, the exhaust effect of this non-powered fan is not good. Utility Model Content

[0004] This invention provides a non-powered ventilation device to solve the problem that existing non-powered fans have poor ventilation performance in light winds.

[0005] To achieve the above objectives, the technical solution of this utility model is:

[0006] According to a first aspect of the present invention, a non-powered ventilation device is provided, comprising a first ventilation zone and a second ventilation zone, wherein an exhaust duct is provided between the first ventilation zone and the second ventilation zone; the second ventilation zone is coaxially arranged with the first ventilation zone, and the top of the second ventilation zone is connected to the exhaust duct.

[0007] The first ventilation zone is provided with several air guide plates that are curved along a set direction. The air guide plates are spaced apart, and the spaced areas form an ambient air inlet and an ambient air outlet. The air guide plates and the spaced areas are used to change the flow direction of the ambient air. The ambient air outlet is connected to the exhaust duct. The area of ​​the ambient air inlet is larger than the area of ​​the ambient air outlet, which is used to create negative pressure in the exhaust duct and thus drive the second ventilation zone to generate exhaust driving force.

[0008] Furthermore, the air guide plate is bent downwards in a horizontal direction from the outside to the inside, the ambient air inlet is horizontal, and the ambient air outlet is vertically downwards.

[0009] Furthermore, the second ventilation zone is located at the center of the first ventilation zone, and the first ventilation zone is surrounding the outer perimeter of the second ventilation zone.

[0010] Furthermore, the first ventilation zone and the second ventilation zone are connected by a connecting plate.

[0011] Furthermore, the second ventilation zone is an annular air duct, and the lower part of the second ventilation zone is longer than that of the first ventilation zone, forming an air outlet for the first and second ventilation zones, which is used to allow the air in the air duct to be discharged from the air outlet through the exhaust duct.

[0012] Furthermore, the air guide plate is bent upwards in a horizontal direction from the outside to the inside, the ambient air inlet is horizontal, and the ambient air outlet is vertically upward.

[0013] Furthermore, the second ventilation zone is located below the first ventilation zone.

[0014] Furthermore, the top of the ventilation device is provided with an air outlet, which is connected to the exhaust channel to allow air from the first ventilation zone and the second ventilation zone to be discharged from the air outlet.

[0015] Furthermore, the ventilation device is also provided with a top cover.

[0016] The beneficial effects of this utility model are:

[0017] This invention utilizes an arc-shaped air guide plate to redirect horizontal natural wind into a vertical direction. Furthermore, the inlet area is larger than the outlet, increasing the wind speed and pressure from the inlet to the outlet. This high-speed airflow generates negative pressure within the exhaust duct, creating suction to expel polluted air. This invention has no moving parts, operates silently, has a lifespan comparable to that of a building, and can generate suction even in a light breeze, eliminating the problem of backdraft. Attached Figure Description

[0018] Figure 1 This is a front view of the non-powered ventilation device in Example 1;

[0019] Figure 2 This is a cross-sectional view of the non-powered ventilation device in Example 1;

[0020] Figure 3 This is a schematic diagram of the non-powered ventilation device in Example 1;

[0021] Figure 4 This is a front view of the non-powered ventilation device in Example 2;

[0022] Figure 5 This is a cross-sectional view of the non-powered ventilation device in Example 2;

[0023] Figure 6 This is a bottom view of the non-powered ventilation device in Example 2.

[0024] In the diagram: 1. First ventilation zone; 2. Second ventilation zone; 3. Exhaust duct; 4. Air guide plate; 5. Ambient air inlet; 6. Ambient air outlet; 7. Air outlet; 8. Connecting plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model. Example 1

[0030] See Figures 1 to 3 According to an embodiment of the first aspect of the present invention, a non-powered ventilation device is provided, including a first ventilation zone 1 and a second ventilation zone 2, wherein an exhaust duct 3 is provided between the first ventilation zone 1 and the second ventilation zone 2; the second ventilation zone 2 is coaxially arranged with the first ventilation zone 1, and the top of the second ventilation zone 2 is connected to the exhaust duct 3.

[0031] The first ventilation zone 1 is provided with several guide plates 4 that are bent in a set direction. The guide plates 4 are spaced apart, and the spaced areas form an ambient air inlet 5 and an ambient air outlet 6. The guide plates 4 and the spaced areas are used to change the flow direction of the ambient air. The ambient air outlet 6 is connected to the exhaust duct 3. The area of ​​the ambient air inlet 5 is larger than the area of ​​the ambient air outlet 6, which is used to create a negative pressure in the exhaust duct 3 and thereby drive the second ventilation zone 2 to generate exhaust driving force.

[0032] In the above-described non-powered ventilation device, the second ventilation zone 2 is annular, and the first ventilation zone 1 is located outside the second ventilation zone 2. The first ventilation zone 1 uses the air guide plate 4 to change the blowing direction of the ambient air entering from the outside from the horizontal direction to the vertical downward direction. The area of ​​the ambient air inlet 5 is larger than the area of ​​the ambient air outlet 6, that is, the interval area of ​​the air guide plate 4 forms a ventilation interval that is wider on the outside and narrower on the inside. This increases the wind speed and wind pressure after the ambient air enters the exhaust duct 3, creating a negative pressure in the exhaust duct 3. Under the action of the negative pressure in the exhaust duct 3, the indoor air enters the exhaust duct 3 from the second ventilation zone 2 upwards, and then exits from the exhaust duct 3 downwards and outwards, achieving the purpose of exhausting the indoor polluted air and achieving the effect of ventilation.

[0033] Based on Bernoulli's principle, which describes the characteristics of high-velocity, low-pressure fluids, this invention utilizes an arc-shaped air guide plate 4 to convert horizontal natural wind into vertical wind. Furthermore, the inlet area is larger than the outlet 7, increasing the wind speed and pressure from the inlet to the outlet 7. This high-speed airflow generates negative pressure within the exhaust duct 3, thus creating suction to expel polluted air. This invention has no moving parts, operates silently, has a lifespan comparable to that of a building, and can generate suction even in a light breeze, eliminating the problem of backdraft.

[0034] In this embodiment, the air guide plate 4 is bent downwards horizontally from the outside to the inside, the ambient air inlet 5 is horizontal, and the ambient air outlet 6 is vertically downwards. This application changes the blowing direction of the ambient air by using the air guide plate 4, changing it from blowing in from a horizontal direction to blowing out from a vertical direction. Through the air guide plate 4 and the structure of the interval area being wider at the outside and narrower at the inside, the wind speed and wind pressure increase after the ambient air enters the exhaust duct 3, thereby driving the air in the second area into the exhaust duct 3 and outwards.

[0035] In this embodiment, the second ventilation zone 2 is located at the center of the first ventilation zone 1, and the first ventilation zone 1 is fitted around the outer perimeter of the second ventilation zone 2. The ventilation device of this application has a cylindrical shape, so that the ambient air around the ventilation device can enter the exhaust duct 3 from the first ventilation zone 1, thereby improving the indoor air exchange effect.

[0036] In this embodiment, the first ventilation zone 1 and the second ventilation zone 2 are connected by a connecting plate. In this application, the first ventilation zone 1 and the second ventilation zone 2 are connected as a whole by a connecting plate 8. In order not to affect the exhaust effect of the exhaust duct 3, the number of connecting plates 8 should not be too large, just enough to make the connection between the first ventilation zone 1 and the second ventilation zone 2 stable.

[0037] In this embodiment, the second ventilation zone 2 is an annular air duct. The lower part of the second ventilation zone 2 is longer than the first ventilation zone 1, forming the air outlet 7 of the first ventilation zone 1 and the second ventilation zone 2, and the air outlet 7 of the exhaust duct 3, which is used to allow the air in the air duct to be discharged from the air outlet 7 through the exhaust duct 3. The second ventilation zone 2 is connected to the room, and the air duct is used to exhaust the air in the room to the outside. Example 2

[0038] See Figures 4 to 6 This embodiment is basically the same as embodiment 1, except that the air guide plate 4 is bent upward in the horizontal direction from the outside to the inside, the ambient air inlet 5 is in the horizontal direction, and the ambient air outlet 6 is in the vertical upward direction.

[0039] In this embodiment, the ambient air enters from the outside of the first ventilation zone 1. Since the air guide plate 4 is bent upward in the horizontal direction from the outside to the inside, the ambient air changes from the horizontal direction to the vertical upward direction and blows into the exhaust duct 3. Through the structure of the air guide plate 4 and the spacer area which is wider at the outside and narrower at the inside, the wind speed and wind pressure increase after the ambient air enters the exhaust duct 3, thereby driving the indoor air from the second area into the exhaust duct 3 and exhausting it outward from the exhaust fan, thus achieving the purpose of removing indoor polluted air.

[0040] In this embodiment, the second ventilation zone 2 is located below the first ventilation zone 1, and the diameter of the first ventilation zone 1 is larger than the diameter of the second ventilation zone 2. The first ventilation zone 1 is located above and outside the second ventilation zone 2, so that the top of the second ventilation zone 2 is connected to the exhaust duct 3, facilitating the upward exhaust of indoor air into the exhaust duct 3.

[0041] The second ventilation zone can be composed of a bottom air guide plate that is bent upwards, or it can be composed of an air guide duct connected to the bottom air guide plate.

[0042] In this embodiment, the top of the ventilation device is provided with an air outlet 7, which is connected to the exhaust channel to allow the air in the first ventilation zone 1 and the second ventilation zone to be discharged from the air outlet 7.

[0043] In this embodiment, the ventilation device is also provided with a top cover. The top cover serves to prevent rain and falling foreign objects.

[0044] Experimental Case:

[0045] The non-powered ventilation device in Examples 1 and 2 was used as the experimental group, and the same device purchased from the market as the patented product with application number 200820152745.X was used as the control group.

[0046] Wind speed testing equipment: Delixi high-precision anemometer.

[0047] Experimental procedure: An experimental wind tunnel was built, and the air volume discharged by the ventilation devices of the experimental group and the control group under different wind speeds was tested using an anemometer. The results are shown in Table 1.

[0048] Table 1. Exhaust performance test results of this application and the control group.

[0049]

[0050] As shown in Table 1, the non-powered ventilation devices in Embodiments 1 and 2 of this application have better exhaust volume and exhaust effect than traditional rotary ventilators. This application can still exhaust air in a light breeze of 0.5 m / s, with an exhaust volume of 0.16-0.17 m³ / s. 3 The control group, with a wind speed of 0.5 m / s, does not start and has no exhaust function. Furthermore, it is susceptible to backflow due to unstable wind direction in the natural environment.

[0051] The non-powered ventilation device of this application has an exhaust volume that is 1.2 to 1.3 times that of the control group under working conditions with wind speeds of 1 m / s and 2 m / s.

[0052] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A non-powered ventilation device, characterized in that, It includes a first ventilation zone and a second ventilation zone, with an exhaust duct between the first and second ventilation zones; the second ventilation zone is coaxially arranged with the first ventilation zone, and the top of the second ventilation zone is connected to the exhaust duct. The first ventilation zone is provided with several air guide plates that are curved along a set direction. The air guide plates are spaced apart, and the spaced areas form an ambient air inlet and an ambient air outlet. The air guide plates and the spaced areas are used to change the flow direction of the ambient air. The ambient air outlet is connected to the exhaust duct. The area of ​​the ambient air inlet is larger than the area of ​​the ambient air outlet, which is used to create negative pressure in the exhaust duct and thus drive the second ventilation zone to generate exhaust driving force.

2. The non-powered ventilation device according to claim 1, characterized in that, The air guide plate is bent downwards horizontally from the outside to the inside, the ambient air inlet is horizontal, and the ambient air outlet is vertically downwards.

3. The non-powered ventilation device according to claim 1, characterized in that, The second ventilation zone is located at the center of the first ventilation zone, and the first ventilation zone is surrounding the second ventilation zone.

4. The non-powered ventilation device according to claim 1, characterized in that, The first ventilation zone and the second ventilation zone are connected by a connecting plate.

5. The non-powered ventilation device according to claim 3, characterized in that, The second ventilation zone is an annular air duct. The lower part of the second ventilation zone is longer than that of the first ventilation zone, forming an air outlet for the first and second ventilation zones. This outlet is used to allow the air in the air duct to be discharged from the air outlet through the exhaust duct.

6. The non-powered ventilation device according to claim 1, characterized in that, The air guide plate is bent upwards horizontally from the outside to the inside, the ambient air inlet is horizontal, and the ambient air outlet is vertically upward.

7. The non-powered ventilation device according to claim 6, characterized in that, The second ventilation zone is located below the first ventilation zone.

8. The non-powered ventilation device according to claim 7, characterized in that, The ventilation device is provided with an air outlet at the top, which is connected to the exhaust channel to allow air from the first ventilation zone and the second ventilation zone to be discharged from the air outlet.

9. The non-powered ventilation device according to claim 8, characterized in that, The ventilation device is also equipped with a top cover.

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