Air cap and exhaust system

Abstract

The utility model relates to the technical field of air caps, in particular to an air cap and an exhaust system. The air cap comprises a guide support, a ball cover assembly and a locking piece, and the guide support can be installed above an air outlet of the air duct. The spherical cover assembly comprises an inner hemispherical cover and an outer hemispherical cover which are rotationally arranged on the guide bracket; the spherical cover assembly has a folded state in which the inner hemispherical cover is folded in the outer hemispherical cover and an unfolded state in which the inner hemispherical cover and the outer hemispherical cover are spliced into a sphere; the position of the spherical cover assembly is adjustable in the height direction of the guide support so that the outer hemispherical cover in the folded state or the inner hemispherical cover in the unfolded state can block or open the air outlet. The locking piece is used for locking the dome cover assembly in a folded state or an unfolded state. The exhaust system comprises the air cap, the air outlet is sealed through the outer semi-spherical cover in the folded state or the inner semi-spherical cover in the unfolded state, and the sealing protection performance of an air duct is improved. Meanwhile, the inner semi-spherical cover can be folded in the outer semi-spherical cover, so that the space occupied by the hood is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hoods, in particular to a hood and an exhaust system. Background Art

[0002] In residential buildings and large factories, the hood is an important part of the exhaust system of the toilet, room or workshop. The hood is usually installed on the roof and connected to the air outlet of the air duct. The fan assembly discharges the air in the building through the air outlet of the air duct. At the same time, under the guidance of the hood, the air discharge rate is further accelerated to ensure the ventilation effect inside the building.

[0003] The hood is usually fixed on the roof, and has a fixed and simple structure, which occupies a large space. The existing hood has a poor shielding effect on the air outlet of the air duct, especially when the fan assembly is shut down or in rainy and snowy weather, dust, rain, snow and other debris in the air can easily enter the air duct, reducing the sealing and protective performance of the air duct. Utility Model Content

[0004] The utility model aims to provide a hood and an exhaust system to solve the technical problems in the prior art that the hood occupies a large space and has a poor shielding effect on the air outlet of the air duct.

[0005] To achieve this purpose, the technical solution adopted by the utility model is:

[0006] Hood, including:

[0007] A guide bracket can be installed above the air outlet of the air duct;

[0008] A ball cover assembly, the ball cover assembly comprises an inner hemispherical cover and an outer hemispherical cover both rotatably arranged on the guide bracket, the ball cover assembly has a folded state in which the inner hemispherical cover is folded inside the outer hemispherical cover and an expanded state in which the inner hemispherical cover and the outer hemispherical cover are spliced ​​into a sphere; the ball cover assembly is adjustable in height direction along the guide bracket, so that the outer hemispherical cover in the folded state or the inner hemispherical cover in the expanded state blocks or opens the air outlet;

[0009] A locking member is configured to lock the ball cover assembly in the folded state or the expanded state.

[0010] As a preferred solution, the ball cover assembly further includes a rotating shaft, the guide bracket is provided with the rotating shaft in an adjustable position along the height direction, and the inner hemispherical cover and the outer hemispherical cover are coaxially rotatably arranged on the guide bracket via the rotating shaft.

[0011] As a preferred solution, the outer diameter of the inner hemispherical cover is equal to the inner diameter of the outer hemispherical cover.

[0012] As a preferred solution, the outer diameter of the inner hemispherical cover is smaller than the inner diameter of the outer hemispherical cover, so that when the spherical cover assembly is in the folded state, there is a radial gap between the inner hemispherical cover and the outer hemispherical cover.

[0013] As a preferred solution, the guide bracket includes two columns arranged opposite to each other, each of the columns is provided with a rotating shaft which is adjustably mounted along the height direction, and the inner hemispherical cover and the outer hemispherical cover are both located between the two columns.

[0014] As a preferred solution, the column is provided with a slide groove extending along the height direction, and the two rotating shafts are respectively slidably arranged in the corresponding slide grooves.

[0015] As a preferred solution, the locking member is threadedly connected to the rotating shaft to lock the rotating shaft on the guide bracket, and at the same time lock the ball cover assembly in the folded state or the expanded state.

[0016] As a preferred solution, the outer hemispherical cover includes a main spherical cover and a pressure ring, the pressure ring extends outward from the outer edge of the main spherical cover, the main spherical cover in the folded state is arranged on the air outlet, and the pressure ring is pressed against the outer edge of the air outlet.

[0017] As a preferred solution, a sealing ring is provided on the side of the pressure ring facing the air outlet.

[0018] The exhaust system includes a fan assembly, an air duct and the above-mentioned hood, wherein the fan assembly is connected to the air inlet of the air duct, and the outer hemispherical cover in the folded state or the inner hemispherical cover in the unfolded state can block or open the air outlet.

[0019] The beneficial effects of the utility model are:

[0020] The wind cap proposed by the utility model, when the ball cover assembly is in the folded state and the outer hemispherical cover opens the air outlet, the spherical surface of the outer hemispherical cover is used to guide the air of the air outlet. When the ball cover assembly is in the folded state and the outer hemispherical cover blocks the air outlet, a good shielding effect on the air outlet is achieved, dust, rain, snow and other debris in the air are prevented from entering the air duct, and the sealing and protective performance of the air duct is improved. When the ball cover assembly is in the unfolded state and the inner hemispherical cover opens the air outlet, the spherical surface of the inner hemispherical cover is used to guide the air of the air outlet, and the outer hemispherical cover has a shielding effect on the air outlet. When the ball cover assembly is in the unfolded state and the inner hemispherical cover blocks the air outlet, a good shielding effect on the air outlet is achieved, dust, rain, snow and other debris in the air are prevented from entering the air duct, and the sealing and protective performance of the air duct is improved, so that the wind cap can adapt to different weather conditions. In addition, when the ball cover assembly is in the folded state, the inner hemispherical cover is folded inside the outer hemispherical cover, reducing the space occupied by the wind cap.

[0021] The exhaust system proposed by the utility model includes the above-mentioned hood, and uses the spherical surface of the inner hemispherical cover or the outer hemispherical cover to guide the air at the air outlet, and at the same time, the outer hemispherical cover in the folded state or the inner hemispherical cover in the unfolded state seals the air outlet, thereby achieving a good shielding effect on the air outlet, improving the sealing and protective performance of the air duct, and enabling the hood to adapt to different weather conditions. In addition, when the spherical cover assembly is in the folded state, the inner hemispherical cover is folded inside the outer hemispherical cover, reducing the space occupied by the hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the wind cap in rainy and snowy weather provided by the embodiment of the utility model;

[0023] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0024] Figure 3 It is a structural schematic diagram of the hood when the fan assembly provided by the embodiment of the utility model stops working;

[0025] Figure 4 This is a schematic diagram of the structure of the wind cap for sunny days provided by the embodiment of the utility model;

[0026] Figure 5 It is a schematic structural diagram of the wind cap when the fan assembly is temporarily shut down provided by an embodiment of the utility model.

[0027] The names and numbers of the components in the figure are as follows:

[0028] 10. Air duct; 101. Air outlet; 102. Steel wire grille;

[0029] 1. Guide bracket; 11. Post; 2. Inner hemispherical cover; 3. Outer hemispherical cover; 31. Main hemispherical cover; 32. Pressing ring; 4. Locking piece; 5. Rotating shaft. DETAILED DESCRIPTION

[0030] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0034] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0035] This embodiment proposes an exhaust system, which is mainly used to ensure the ventilation effect inside buildings such as residences and large factories. Figure 1 As shown, the exhaust system includes a fan assembly, an air duct 10 and a hood. The fan assembly is connected to the air inlet of the air duct 10. Under the guidance of the hood, the air in the air duct 10 can be quickly discharged. A steel wire grille 102 is installed at the air outlet 101 of the air duct 10 to prevent larger impurities from entering the air duct 10 while ensuring normal air circulation.

[0036] The hood is generally fixedly mounted on the roof, and has a fixed and simple structure, and the air flow is guided by the rotation of the guide blades of the hood. The existing hood has a poor shielding effect on the air outlet 101 of the air duct 10, especially when the fan assembly is shut down or in rainy and snowy weather, dust, rain, snow and other debris in the air can easily enter the air duct 10, reducing the sealing protection performance of the air duct 10.

[0037] To solve the above problems, Figure 1 to Figure 5 As shown, this embodiment also proposes a hood, which includes a guide bracket 1, a ball cover assembly and a locking member 4. The guide bracket 1 is installed above the air outlet 101 of the air duct 10. The ball cover assembly includes an inner hemispherical cover 2 and an outer hemispherical cover 3, both of which are rotatably arranged on the guide bracket 1. The ball cover assembly has a folded state in which the inner hemispherical cover 2 is folded inside the outer hemispherical cover 3 and an expanded state in which the inner hemispherical cover 2 and the outer hemispherical cover 3 are spliced ​​into a sphere. The position of the ball cover assembly along the height direction of the guide bracket 1 is adjustable so that the outer hemispherical cover 3 in the folded state or the inner hemispherical cover 2 in the expanded state blocks or opens the air outlet 101. The locking member 4 is used to lock the ball cover assembly in the folded state or the expanded state.

[0038] When the ball cover assembly is in the folded state and the outer hemispherical cover 3 opens the air outlet 101, the spherical surface of the outer hemispherical cover 3 is used to guide the air at the air outlet 101. When the ball cover assembly is in the folded state and the outer hemispherical cover 3 blocks the air outlet 101, a good shielding effect is achieved for the air outlet 101, preventing dust, rain, snow and other debris in the air from entering the air duct 10, thereby improving the sealing and protection performance of the air duct 10. When the ball cover assembly is in the unfolded state and the inner hemispherical cover 2 opens the air outlet 101, the spherical surface of the inner hemispherical cover 2 is used to guide the air at the air outlet 101 (such as Figure 1 ), the outer hemispherical cover 3 has a shielding effect on the air outlet 101. When the dome cover assembly is in the unfolded state and the inner hemispherical cover 2 blocks the air outlet 101, a good shielding effect is achieved on the air outlet 101, preventing dust, rain, snow and other debris in the air from entering the air duct 10, improving the sealing and protective performance of the air duct 10, and enabling the hood to adapt to different weather conditions. In addition, when the dome cover assembly is in the folded state, the inner hemispherical cover 2 is folded inside the outer hemispherical cover 3, reducing the space occupied by the hood.

[0039] The inner hemispherical cover 2 and the outer hemispherical cover 3 of this embodiment are both hemispherical shell structures, so that the inner hemispherical cover 2 and the outer hemispherical cover 3 are light in weight, which facilitates the quick switching of the hemispherical cover assembly between the folded state and the unfolded state. The hemispherical cover assembly is located directly above the air outlet 101 of the air duct 10, and the height direction of the hemispherical cover assembly is adjustable along the guide bracket 1. When the hemispherical cover assembly is lowered to a specified height, the inner hemispherical cover 2 or the outer hemispherical cover 3 can block the air outlet 101; when the hemispherical cover assembly is raised to a specified height, the inner hemispherical cover 2 or the outer hemispherical cover 3 can open the air outlet 101.

[0040] like Figure 1 and Figure 2As shown, the ball cover assembly also includes a rotating shaft 5, and the guide bracket 1 is provided with the rotating shaft 5 in an adjustable position along the height direction, and the inner hemispherical cover 2 and the outer hemispherical cover 3 are coaxially rotatably arranged on the guide bracket 1 through the rotating shaft 5. The inner hemispherical cover 2 and the outer hemispherical cover 3 are both rotatably sleeved on the rotating shaft 5, so that the inner hemispherical cover 2 and the outer hemispherical cover 3 are independently rotated around the rotating shaft 5. Through the rotation of the inner hemispherical cover 2 and the outer hemispherical cover 3, the inner hemispherical cover 2 can be folded inside the outer hemispherical cover 3 or the inner hemispherical cover 2 and the outer hemispherical cover 3 can be spliced ​​into a sphere, thereby improving the conversion efficiency of the ball cover assembly between the folded state and the unfolded state. At the same time, the rotating shaft 5 can drive the inner hemispherical cover 2 and the outer hemispherical cover 3 to move up and down along the height direction of the guide bracket 1 to adjust the height of the inner hemispherical cover 2 and the outer hemispherical cover 3, thereby opening or blocking the air outlet 101.

[0041] It should be noted that the outer diameter of the inner hemispherical cover 2 of this embodiment is equal to the inner diameter of the outer hemispherical cover 3, which not only enables the inner hemispherical cover 2 to be completely folded inside the outer hemispherical cover 3, but also ensures that the sphere formed by splicing the inner hemispherical cover 2 and the outer hemispherical cover 3 does not have a splicing gap (or only has a very small splicing gap) at the splicing point. In other embodiments, the outer diameter of the inner hemispherical cover 2 can also be smaller than the inner diameter of the outer hemispherical cover 3, so that when the ball cover assembly is in the folded state, there is a radial gap between the inner hemispherical cover 2 and the outer hemispherical cover 3, so that there is no interference when the inner hemispherical cover 2 and the outer hemispherical cover 3 rotate around the rotating shaft 5 respectively, and at the same time, the two hemispherical covers are prevented from rubbing when the inner hemispherical cover 2 is folded inside the outer hemispherical cover 3. It can be understood that the above-mentioned radial gap should not be too large, and can be about 1mm to 5mm, so as to avoid too large a splicing gap of the sphere at the splicing point.

[0042] like Figure 1 and Figure 3 As shown, the guide bracket 1 includes two columns 11 arranged opposite to each other, each column 11 is provided with a rotating shaft 5 which is adjustable in height direction, and the inner hemispherical cover 2 and the outer hemispherical cover 3 are both located between the two columns 11. By providing two rotating shafts 5, the stability of the inner hemispherical cover 2 and the outer hemispherical cover 3 when they rotate independently around the rotating shafts 5 is improved.

[0043] Specifically, the column 11 is provided with a slide groove extending in the height direction, and the two shafts 5 are respectively slidably arranged in the corresponding slide grooves. Through the sliding cooperation between the shaft 5 and the slide groove, the slide groove has a good guiding and limiting effect on the shaft 5, ensuring that the two shafts 5 drive the two hemispherical covers to stably move up and down along the height direction of the guide bracket 1.

[0044] In this embodiment, one end of the rotating shaft 5 extends between the two posts 11, the inner hemispherical cover 2 and the outer hemispherical cover 3 are sequentially sleeved on the rotating shaft 5, and the other end of the rotating shaft 5 extends to the outside of the two posts 11. The locking member 4 cooperates with the rotating shaft 5 to keep the ball cover assembly in a folded state or an expanded state, and at the same time locks the rotating shaft 5 and the two hemispherical covers at a specified height of the posts 11.

[0045] Specifically, the locking member 4 is threadedly connected with the rotating shaft 5 to lock the rotating shaft 5 on the guide bracket 1, and at the same time, the ball cover assembly is locked in the folded state or the unfolded state. The locking member 4 of this embodiment can be a nut, and the portion of the rotating shaft 5 extending outside the two columns 11 has an external thread that matches the nut. When the nut is locked with the rotating shaft 5, not only can the relative position of the inner hemispherical cover 2 and the outer hemispherical cover 3 be locked, but the rotating shaft 5 can also be locked with the corresponding column 11 to lock the ball cover assembly at a specified height.

[0046] like Figure 2 and Figure 3 As shown, the outer hemispherical cover 3 includes a main spherical cover 31 and a pressure ring 32. The outer edge of the main spherical cover 31 is extended with a pressure ring 32. The main spherical cover 31 in the folded state is arranged on the air outlet 101, and the pressure ring 32 is pressed against the outer edge of the air outlet 101. The pressure ring 32 is pressed against the outer edge of the air outlet 101 to avoid a gap between the main spherical cover 31 and the outer edge of the air outlet 101 when the outer hemispherical cover 3 blocks the air outlet 101, thereby ensuring the shielding effect of the outer hemispherical cover 3 on the air outlet 101, preventing dust, rain, snow and other debris in the air from entering the air duct 10 through the gap between the main spherical cover 31 and the outer edge of the air outlet 101, and improving the sealing and protection performance of the air duct 10.

[0047] Furthermore, a sealing ring is provided on the side of the pressure ring 32 facing the air outlet 101. By adding the sealing ring, the sealing effect between the pressure ring 32 and the outer edge of the air outlet 101 is enhanced, and the sealing protection performance of the air duct 10 is further improved.

[0048] For ease of understanding, the specific usage of the hood of this embodiment is as follows:

[0049] like Figure 1 As shown, when the external environment of the hood is rainy and snowy (i.e. not sunny) and the fan assembly is working normally, the locking member 4 releases the rotating shaft 5, so that the rotating shaft 5 slides along the slide groove of the column 11 and rises to the specified position, and the outer hemispherical cover 3 in the unfolded state opens the air outlet 101. Then the inner hemispherical cover 2 and the outer hemispherical cover 3 rotate around the rotating shaft 5 and are spliced ​​into a sphere, that is, the ball cover assembly is in the unfolded state, and the locking member 4 locks the rotating shaft 5. The outer hemispherical cover 3 has a certain shielding effect on the air outlet 101, and the air enters the air duct 10 through the air inlet of the air duct 10 and flows out from the air outlet 101. The spherical surface of the inner hemispherical cover 2 guides the air at the air outlet 101.

[0050] like Figure 3 As shown, when the fan assembly stops working, the locking member 4 releases the rotating shaft 5, and the inner hemispherical cover 2 and the outer hemispherical cover 3 rotate around the rotating shaft 5, so that the inner hemispherical cover 2 is folded inside the outer hemispherical cover 3, that is, the cover assembly is in a folded state. At this time, the openings of the inner hemispherical cover 2 and the outer hemispherical cover 3 are set downward (that is, toward the air outlet 101), and then the rotating shaft 5 slides along the sliding groove of the column 11 and descends to a specified position, so that the outer hemispherical cover 3 in the folded state blocks the air outlet 101, and the locking member 4 locks the rotating shaft 5.

[0051] like Figure 4 As shown, when the external environment of the hood is sunny (i.e., not rainy or snowy) and the fan assembly is working normally, the locking member 4 releases the rotating shaft 5, so that the rotating shaft 5 slides along the slide slot of the column 11 and rises to the specified position, and the inner hemispherical cover 2 is folded inside the outer hemispherical cover 3, that is, the spherical cover assembly is in a folded state, the outer hemispherical cover 3 in the folded state opens the air outlet 101, and the locking member 4 locks the rotating shaft 5. It should be noted that at this time, the openings of the inner hemispherical cover 2 and the outer hemispherical cover 3 are set upward (i.e., away from the air outlet 101), and the air enters the air duct 10 through the air inlet of the air duct 10 and flows out from the air outlet 101, and the spherical surface of the outer hemispherical cover 3 guides the air at the air outlet 101.

[0052] like Figure 5 As shown, when the external environment of the hood is rainy and snowy (i.e. not sunny) and the fan assembly is temporarily shut down, the wire grille 102 at the air outlet 101 is first removed, the locking member 4 releases the shaft 5, and the spherical cover assembly remains in the unfolded state. Then the shaft 5 slides along the slide groove of the column 11 and descends to a specified position, the inner hemispherical cover 2 in the unfolded state blocks the air outlet 101, and the locking member 4 locks the shaft 5.

[0053] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A hood, characterized in that: include: A guide bracket (1) capable of being installed above an air outlet (101) of an air duct (10); A spherical cover assembly, the spherical cover assembly comprising an inner hemispherical cover (2) and an outer hemispherical cover (3) both rotatably arranged on the guide bracket (1), the spherical cover assembly having a folded state in which the inner hemispherical cover (2) is folded inside the outer hemispherical cover (3) and an expanded state in which the inner hemispherical cover (2) and the outer hemispherical cover (3) are spliced ​​into a sphere; the spherical cover assembly is adjustable in height direction along the guide bracket (1) so that the outer hemispherical cover (3) in the folded state or the inner hemispherical cover (2) in the expanded state blocks or opens the air outlet (101); A locking member (4), wherein the locking member (4) is configured to lock the ball cover assembly in the folded state or the expanded state.

2. The hood according to claim 1, characterized in that: The ball cover assembly further comprises a rotating shaft (5), the guide bracket (1) being provided with the rotating shaft (5) in an adjustable position along the height direction, and the inner hemispherical cover (2) and the outer hemispherical cover (3) being coaxially rotatably arranged on the guide bracket (1) via the rotating shaft (5).

3. The hood according to claim 2, characterized in that: The outer diameter of the inner hemispherical cover (2) is equal to the inner diameter of the outer hemispherical cover (3).

4. The hood according to claim 2, characterized in that: The outer diameter of the inner hemispherical cover (2) is smaller than the inner diameter of the outer hemispherical cover (3), so that when the spherical cover assembly is in the folded state, a radial gap exists between the inner hemispherical cover (2) and the outer hemispherical cover (3).

5. The hood according to claim 2, characterized in that: The guide bracket (1) comprises two columns (11) arranged opposite to each other, each of the columns (11) being provided with a rotating shaft (5) which is adjustable in position along the height direction, and the inner hemispherical cover (2) and the outer hemispherical cover (3) are both located between the two columns (11).

6. The hood according to claim 5, characterized in that: The upright column (11) is provided with a slide groove extending along the height direction, and the two rotating shafts (5) are respectively slidably arranged in the corresponding slide grooves.

7. The hood according to claim 2, characterized in that: The locking member (4) is threadedly connected to the rotating shaft (5) to lock the rotating shaft (5) onto the guide bracket (1) and simultaneously lock the ball cover assembly in the folded state or the unfolded state.

8. The hood according to claim 1, characterized in that: The outer hemispherical cover (3) comprises a main spherical cover (31) and a pressure ring (32); the pressure ring (32) extends outward from the outer edge of the main spherical cover (31); the main spherical cover (31) in the retracted state is arranged on the air outlet (101), and the pressure ring (32) is pressed against the outer edge of the air outlet (101).

9. The hood according to claim 8, characterized in that: A sealing ring is provided on the side of the pressure ring (32) facing the air outlet (101).

10. Exhaust system, characterized in that, It comprises a fan assembly, an air duct (10) and a hood according to any one of claims 1 to 9, wherein the fan assembly is connected to the air inlet of the air duct (10), and the outer hemispherical cover (3) in the folded state or the inner hemispherical cover (2) in the unfolded state can block or open the air outlet (101).

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