Non-return air door assembly

Abstract

The utility model relates to the field of integrated stove accessories, and particularly discloses a non-return air door assembly which comprises a connecting pipe connected with a smoke exhaust pipeline, an air duct is formed in the connecting pipe, and an annular inner convex ring is arranged on the inner wall of the connecting pipe; a left door capable of rotating forwards to open the left side of the air duct is hinged to the front left side of the inner convex ring; a right door capable of rotating forwards to open the air duct is hinged to the front right side of the inner convex ring; reset springs capable of tensioning the left door and the right door to be tightly attached to the inner protruding ring to close the air channel are arranged at the hinged positions of the left door and the right door. When the range hood is not used, the air duct can be closed, noise is prevented from being increased, the wind gathering effect can be achieved, and the oil smoke exhaust efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of integrated cooker accessories, especially to a check damper assembly. BACKGROUND

[0002] The existing integrated cooker check damper structure is a check valve, including a connecting pipe connected with a smoke exhaust duct, a wind channel is formed in the connecting pipe, a vertical strip is arranged in the middle of the wind channel, a left door is hinged to the left side of the front of the vertical strip, a right door is hinged to the right side of the front of the vertical strip, a reset spring is arranged at the hinge of the left door and the right door, the left door and the right door are closed on the left side of the wind channel and the right side of the wind channel under the action of the reset spring, the left door and the right door rotate forward around the vertical strip under the push of the wind force, and the left side of the wind channel and the right side of the wind channel are opened. Although the wind channel can be closed when not in use, it is found that the wind force of the smoke exhaust duct is limited, and the left door and the right door are basically in an incomplete opening state, at this time, the left door will guide the wind to the left side wall in the wind channel, and the right door will guide the wind to the right side wall in the wind channel, which will guide the wind to the two sides and disperse, not only increasing the noise, but also weakening the wind force, and the oil fume cannot be effectively conveyed out. SUMMARY

[0003] The purpose of the present application is to provide a check damper assembly which can close the wind channel when not in use, avoid increasing the noise, and also play a role in wind gathering, and improve the oil fume exhaust efficiency.

[0004] To achieve this purpose, the following technical scheme is adopted: a check damper assembly, including a connecting pipe connected with a smoke exhaust duct, a wind channel is formed in the connecting pipe, an annular inner convex ring is arranged on the inner wall of the connecting pipe; a left door which can rotate forward to open the left side of the wind channel is hinged to the left side of the front of the inner convex ring; a right door which can rotate forward to open the wind channel is hinged to the right side of the front of the inner convex ring; a reset spring which can tighten the left door and the right door to close the wind channel is arranged at the hinge of the left door and the right door. When not in use, the left door and the right door are pressed on the convex ring under the action of the reset spring, and the wind channel is closed, which avoids the entry of insects from the outside and the transmission of the smell in the flue; when in use, the wind force drives the oil fume to pass through the connecting pipe and the wind channel to be discharged, in this process, the wind force drives the left door to rotate leftward to open, and the wind force drives the right door to rotate rightward to open, the ends of the left door and the right door are close to each other, forming a V shape, which is conducive to the gathering of the wind force, increasing the wind force, and improving the oil fume exhaust efficiency; and the wind force is avoided from being guided to the inner wall of the wind channel, avoiding the increase of the noise.

[0005] Further, the inner convex ring is provided with an intermediate plate, the left opening is formed by the left side of the intermediate plate, the right opening is formed by the right side of the intermediate plate, the area of the left door is larger than that of the left opening, and the area of the right door is larger than that of the right opening; the left door is hinged to the left side of the left opening and rotates to close the left opening; the right door is hinged to the right side of the right opening and rotates to close the right opening. The intermediate plate is added, so that the left door can completely close the left opening and the right door can completely close the right opening when closing, the closing effect is ensured, insects are prevented from entering, and smell is prevented from being emitted.

[0006] Further, the left door surface is provided with a left convex edge which can be inserted into the left opening, and the right door surface is provided with a right convex edge which can be inserted into the right opening. The sealing effect of closing is further improved.

[0007] Further, the connecting pipe is provided with an outer convex ring, the outer convex ring is provided with mounting holes, and the outer periphery of the outer convex ring is provided with a convex ring which can press the flange plate of the smoke exhaust duct. The flange plate of the smoke exhaust duct is conveniently installed.

[0008] Further, the inner convex ring has a backwardly inclined bottom.

[0009] The utility model discloses the beneficial effects that can close the air duct when not using, avoid increasing noise, can also play the role of wind gathering, improve the oil fume exhaust efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the structure diagram of the utility model Figure One ;

[0011] Figure 2 It is the structure diagram of the utility model Figure Two ;

[0012] Figure 3 It is the structure diagram of the utility model Figure Three ;

[0013] Figure 4 It is the structure diagram of the utility model Figure Four ;

[0014] Figure 5 It is the structure diagram of the utility model Figure Five ;

[0015] Figure 6 It is the structure diagram of the utility model Figure 5 ;

[0016] Figure 7 It is the structure diagram of the utility model Figure Six ;

[0017] Figure 8 It is the structure diagram of the utility model Figure Seven ;

[0018] Figure 9 The utility model structure schematic Figure Eight ;

[0019] Among them, connecting pipe 1, inner convex ring 2, intermediate plate 21, left opening 22, right opening 23, left door 3, left convex edge 31, right door 4, right convex edge 41, outer convex ring 5, convex ring 51, mounting hole 6. DETAILED DESCRIPTION

[0020] The application will be described in further detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the application, and not to limit the application. In addition, it should be noted that, for the convenience of description, only the parts related to the application are shown in the drawings, not all the structures. In the description of the application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0021] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or it can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical direction of the first feature above and oblique above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical direction of the first feature below and oblique below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0022] In the description of the present embodiment, the terms "upper", "lower", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the application. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0023] As Figures 1-9 shown, a check damper assembly, comprising a connecting pipe 1, the connecting pipe 1 is connected to the smoke exhaust duct, a wind channel is formed in the connecting pipe 1, and the wind channel is used for transmitting oil fume. This part is similar to the existing integrated stove check valve.

[0024] Specifically, the inner wall of the connecting pipe 1 is provided with an annular inner convex ring 2, and the inner convex ring 2 has a backward inclined bottom. The left side of the front of the inner convex ring 2 is hinged with a left door 3, and the left door 3 can be rotated forward to open the left side of the air duct. The right side of the front of the inner convex ring 2 is hinged with a right door 4, and the right door 4 can be rotated forward to open the air duct. The hinged parts of the left door 3 and the right door 4 are provided with return springs, which can pull the left door 3 and the right door 4 to tightly close the air duct. The left door 3 and the right door 4 are semicircular, and the areas of the left door 3 and the right door 4 are equal. The installation mode of the left door 3, the right door 4 and the return spring in this part is similar to the existing integrated cooker check valve. That is, the return spring can be a left torsional spring and a right torsional spring. The left side of the front of the inner convex ring 2 is provided with a left U-shaped groove, the left side of the left door 3 is provided with a left protruding block, the left protruding block is inserted into the left U-shaped groove, the left U-shaped groove is provided with a left rotating shaft penetrating through the left protruding block, the left protruding block rotates around the left U-shaped groove through the left rotating shaft, and the left rotating shaft is provided with a left torsional spring. Similarly, the right side of the front of the inner convex ring 2 is provided with a right U-shaped groove, the right side of the right door 4 is provided with a right protruding block, the right protruding block is inserted into the right U-shaped groove, the right U-shaped groove is provided with a right rotating shaft penetrating through the right protruding block, the right protruding block rotates around the right U-shaped groove through the right rotating shaft, and the right rotating shaft is provided with a right torsional spring. Of course, the return spring can also be a left tension spring and a right tension spring. One end of the left tension spring is connected with the left door, and the other end of the left tension spring is connected with the left inner wall of the connecting pipe 1. One end of the right tension spring is connected with the right door, and the other end of the right tension spring is connected with the right inner wall of the connecting pipe 1.

[0025] Furthermore, the middle of the inner convex ring 2 is provided with a middle plate 21, the left side of the inner convex ring 2 located at the middle plate 21 forms a left opening 22, the right side of the inner convex ring 2 located at the middle plate 21 forms a right opening 23, and the left opening 22 and the right opening 23 are also semicircular, and the areas of the left opening 22 and the right opening 23 are also equal. The area of the left door 3 is greater than the area of the left opening, and the area of the right door 4 is greater than the area of the right opening. The left door 3 is hinged to the left side of the left opening 22, and then rotates to close the left opening. The right door 4 is hinged to the right side of the right opening 23, and then rotates to close the right opening.

[0026] The surface of the left door 3 is provided with a flat left convex edge 31, and the left convex edge 31 is also semicircular, and the area of the left convex edge 31 is slightly smaller than the area of the left opening 22. When the left door 3 is closed, the left convex edge 31 can be inserted into the left opening 22. Similarly, the surface of the right door 4 is provided with a flat right convex edge 41, and the right convex edge 41 is also semicircular, and the area of the right convex edge 41 is slightly smaller than the area of the right opening 23. When the right door 4 is closed, the right convex edge 41 can be inserted into the right opening 23.

[0027] The outer periphery of the connecting pipe 1 is provided with an outer convex ring 5, and the outer convex ring 5 can be pressed tightly with the flange of the smoke exhaust duct. The outer convex ring 5 is provided with three mounting holes 6, and bolts for connecting the flange of the smoke exhaust duct are arranged in the mounting holes 6. The outer periphery of the outer convex ring 5 is provided with a convex ring 51, and the convex ring 51 presses the flange of the smoke exhaust duct.

[0028] When installing, the rear end of the connecting pipe 1 is inserted through the side wall of the integrated cooker, and is inserted into the oil fume channel in the integrated cooker, and then the outer convex ring is pressed on the outer wall of the integrated cooker, the front end of the connecting pipe 1 is inserted into the rear end of the outer smoke exhaust pipe, the flange plate at the rear end of the smoke exhaust pipe is inserted into the convex ring 51, and then the bolt is inserted through the mounting hole 6 of the flange plate, the outer convex ring and the outer wall of the integrated cooker, and then the nut is screwed to fix.

[0029] When using, the oil fume in the integrated cooker is driven by the wind of the fan, and then is exhausted from the smoke exhaust pipe. In this process, the wind drives the left door 3 and the right door 4 to rotate and open in the direction of the exhaust pipe, that is, the left door 3 overcomes the pulling force of the left torsional spring and rotates to the left to open, and the right door 4 overcomes the pulling force of the right torsional spring and rotates to the right to open. Since the connecting pipe 1 is circular, the left door 3 and the right door 4 are blocked when they are opened. The left door 3 and the right door 4 are also V-shaped in the open state, and the open shape can gather the wind, increase the wind power, and be beneficial to the exhaust of the oil fume. That is, the wind exhausted from the left opening 22 gathers in the middle along the left door 3, and the wind exhausted from the right opening gathers in the middle along the right door. The greater the wind power is, the greater the opening angle of the left door 3 and the right door 4 is, and the greater the exhaust amount is. When the fan is closed, the wind power stops, and then the left door 3 rotates to close the left opening 22 under the resetting force of the left torsional spring, and the left convex edge 31 is inserted into the left opening 22. At the same time, the right door 4 rotates to close the right opening 23 under the resetting force of the right torsional spring, and the right convex edge 41 is inserted into the right opening 23.

[0030] Obviously, the above embodiments of the present application are merely exemplary but not intended to limit the embodiments of the present application. Various obvious changes and replacements can be made by those skilled in the art without departing from the scope of the present application. Here, it is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A check damper assembly comprising a connecting pipe (1) connecting a smoke exhaust duct, a duct being formed in the connecting pipe (1), characterized in that: The inner wall of the connecting pipe (1) is provided with an annular inner convex ring (2); the left side of the front of the inner convex ring (2) is hingedly connected with a left door (3) capable of rotating forward to open the left side of the air duct; the right side of the front of the inner convex ring (2) is hingedly connected with a right door (4) capable of rotating forward to open the air duct; the hinge joints of the left door (3) and the right door (4) are each provided with a return spring capable of tensioning the left door (3) and the right door (4) to tightly close the air duct.

2. The back pressure door assembly of claim 1, wherein: The middle of the inner convex ring (2) is provided with a middle plate (21), the left side of the inner convex ring (2) relative to the middle plate (21) forms a left opening (22); the right side of the inner convex ring (2) relative to the middle plate (21) forms a right opening (23), the area of the left door (3) is greater than the area of the left opening, and the area of the right door (4) is greater than the area of the right opening; the left door (3) is hingedly connected to the left side of the left opening (22) and then rotates to close the left opening; the right door (4) is hingedly connected to the right side of the right opening (23) and then rotates to close the right opening.

3. The back pressure door assembly of claim 2, wherein: The surface of the left door (3) is provided with a left convex edge (31) capable of being inserted into the left opening (22), and the surface of the right door (4) is provided with a right convex edge (41) capable of being inserted into the right opening (23).

4. The back pressure door assembly of claim 2, wherein: The outer periphery of the connecting pipe (1) is provided with an outer convex ring (5) capable of pressing the flange plate of the smoke exhaust duct, the outer convex ring (5) is provided with a plurality of mounting holes (6) distributed thereon, and the outer periphery of the outer convex ring (5) is provided with a convex ring (51) capable of pressing the flange plate of the smoke exhaust duct.

5. The back pressure door assembly of claim 1, wherein: The inner convex ring (2) has a backwardly inclined bottom.

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