A removable exhaust valve to prevent smoke odor backflow

Abstract

The present invention relates to the technical field of building smoke exhaust air duct systems, and provides a removable exhaust valve to prevent smoke odor backflow, including a main body with an exhaust hole, an opening is also provided on the main body, and a split body that can be inserted / extracted is provided at the opening, and the split body contains at least two check plates for opening / closing the exhaust hole, and the width of the check plate is greater than the height of the split body. During the process of the split body being pulled out from the opening of the main body, one of the check plates close to the main body opening can be flipped to an angle of 180° and overlapped with the other check plate, and when the overlapping thickness reaches a value less than the width of the main body opening, it is pulled out from the main body opening. The present invention changes the existing exhaust valve of this type, breaking the limitation that the split check plate can only be pulled out from the main body opening when the side length corresponding to the closed or open angle is less than the width of the main body opening, so that the split check plate can be pulled out from the main body opening for cleaning, maintenance or replacement at any angle of oil adhesion.

Description

Technical Field

[0001] The invention relates to the technical field of building smoke exhaust duct systems, and in particular provides a withdrawable smoke odor backflow prevention exhaust valve used at an air inlet of a smoke exhaust duct. Background Art

[0002] In the current building kitchen and bathroom smoke exhaust duct system, when using a withdrawable exhaust valve to prevent smoke odor backflow with double check plates that open and close symmetrically, generally only the opening angle of the check plate is considered to meet the ventilation requirements. Therefore, the check plate cannot be flipped to 180° in the design structure, which causes the side length corresponding to the opening angle of the check plate to be greater than the width of the main opening, making it impossible for the split body to be withdrawn from the main opening. Summary of the invention

[0003] The purpose of the present invention is to provide a removable exhaust valve to prevent smoke backflow, aiming to solve the technical problem in the prior art that the split body cannot be pulled out from the main body when the side length corresponding to the opening angle of the check plate of such exhaust valve is greater than the opening width of the main body.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a removable exhaust valve for preventing smoke odor backflow, comprising a main body with a first exhaust hole, an opening being further provided on the main body, and an insertable / removable split body being provided at the opening, the split body comprising at least two check plates for opening / closing the first exhaust hole, the width of the check plates being greater than the height of the split body; one of the check plates can have an opening angle a relative to the other check plate, 0°≤a≤180°; the overlapping thickness of the two check plates or the overlapping thickness of the two check plates after overlapping with other force-applying members is less than the opening width of the main body; during the extraction process of the split body, when the side corresponding to the opening angle of the check plate is greater than the opening width of the main body, the extraction force causes the check plate close to the opening to act on the inner wall of the main body and flip and overlap to overlap on the other check plate and be extracted from the opening.

[0005] Furthermore, the outer cross-section of the main body is circular or rectangular or symmetrically shaped.

[0006] Furthermore, the first exhaust hole of the main body is a single hole, a double hole, or multiple holes.

[0007] Further, a sealing gasket is provided at the joint between the check piece and the first exhaust hole; or a sealing gasket is provided at the sealing surface of the main body corresponding to the end of the check piece.

[0008] Furthermore, the check plate is closed by at least one of gravity, magnetism, elasticity or electric force.

[0009] Furthermore, the two check plates are hinged on the same rotating shaft, or rotate on their own independent rotating shafts or rotate by hinged connection through convex-concave matching.

[0010] Furthermore, the split body is provided with a second exhaust hole connected to the first exhaust hole, the second exhaust hole is a single hole or a double hole or a plurality of holes, and the check plate opens / closes corresponding to the first exhaust hole of the main body or the second exhaust hole of the split body.

[0011] Furthermore, a sealing gasket is provided at the joint between the opening of the main body and the split body.

[0012] Furthermore, the opening and the first exhaust hole are arranged perpendicularly or obliquely to each other.

[0013] Furthermore, a handle is provided on the split body and located on the outside of the main body.

[0014] Beneficial effects of the present invention:

[0015] The present invention changes the existing exhaust valve of this type and breaks the limitation that the split check plate can only be pulled out from the main body opening when the side length corresponding to the closing or opening angle is smaller than the width of the main body opening, so that the split check plate can be pulled out from the main body opening for cleaning, maintenance or replacement at any angle when oil is sticky. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic diagram of a main body plane provided in Embodiment 1 of the present invention;

[0018] Figure 2 for Figure 1 AA section view;

[0019] Figure 3 A split plane schematic diagram provided in Embodiment 1 of the present invention;

[0020] Figure 4 for Figure 3 BB cross-sectional view;

[0021] Figure 5 A cross-sectional schematic diagram of a removable exhaust valve for preventing smoke odor backflow provided in the first embodiment of the present invention;

[0022] Figure 6 It is a cross-sectional schematic diagram of the split extraction process of the first embodiment of the present invention;

[0023] Figure 7 It is a cross-sectional schematic diagram of the split extraction process of the first embodiment of the present invention;

[0024] Figure 8 It is a cross-sectional schematic diagram of the split extraction process of the first embodiment of the present invention;

[0025] Fig. 9 A schematic diagram of a main body plane provided in Embodiment 2 of the present invention;

[0026] Fig.10 for Fig. 9 BB cross-sectional view;

[0027] Fig.11 A split plane schematic diagram provided for the second embodiment of the present invention;

[0028] Fig.12 for Fig.11 CC section view;

[0029] Fig.13 A cross-sectional schematic diagram of a removable exhaust valve for preventing smoke odor backflow provided in the second embodiment of the present invention;

[0030] Fig.14 It is a cross-sectional schematic diagram of the two-part extraction process of an embodiment of the present invention;

[0031] Fig.15 It is a cross-sectional schematic diagram of the two-part extraction process of an embodiment of the present invention;

[0032] Fig.16 It is a cross-sectional schematic diagram of the two-part extraction process of an embodiment of the present invention;

[0033] Fig.17 A schematic diagram of a main body plane provided in Embodiment 3 of the present invention;

[0034] Fig.18 for Fig.17 DD cross-sectional view;

[0035] Fig.19 A schematic diagram of a split plane provided in Embodiment 3 of the present invention;

[0036] Fig. 20 for Fig.19 EE cross-sectional view;

[0037] Fig.21 A cross-sectional schematic diagram of a removable exhaust valve for preventing smoke odor backflow provided in the third embodiment of the present invention;

[0038] Fig. 22 It is a cross-sectional schematic diagram of the three-part extraction process of an embodiment of the present invention;

[0039] Fig.23 It is a cross-sectional schematic diagram of the three-part extraction process of an embodiment of the present invention;

[0040] Fig.24It is a cross-sectional schematic diagram of the three-part extraction process of an embodiment of the present invention;

[0041] 10-main body; 11-first exhaust hole; 12-opening; 20-split; 21-check plate; 22-handle; 23-protrusion; 24-groove; 25-second exhaust hole; 30-rotating shaft. DETAILED DESCRIPTION

[0042] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0043] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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.

[0046] The present invention provides a removable exhaust valve to prevent backflow of smoke odor, a removable exhaust valve to prevent backflow of smoke odor, comprising a main body with a first exhaust hole, an opening being provided on the main body, and an insertable / removable split body being provided at the opening, the split body comprising at least two check plates for opening / closing the first exhaust hole, the width of the check plates being greater than the height of the split body; the overlapping thickness of the two check plates or the overlapping thickness of the two check plates after overlapping with other force-applying members is less than the opening width of the main body; during the extraction process of the split body, when the side corresponding to the opening angle of the check plate is greater than the opening width of the main body, the extraction force causes the check plate close to the opening to act on the inner wall of the main body and flip and overlap to overlap on the other check plate and be extracted from the opening.

[0047] The present invention changes the existing exhaust valve of this type and breaks the limitation that the split check plate can only be pulled out from the main body opening when the side length corresponding to the closing or opening angle is smaller than the width of the main body opening, so that the split check plate can be pulled out from the main body opening for cleaning, maintenance or replacement at any angle when oil is sticky.

[0048] The following is a detailed description with reference to a number of specific embodiments.

[0049] Embodiment 1

[0050] Reference Figures 1 to 8 The withdrawable anti-smoke odor backflow exhaust valve provided in the first embodiment of the present invention comprises a main body 10, the main body 10 is provided with a first exhaust hole 11 in the axial direction and an opening 12 in the radial direction, and an insertable / extractable split body 20 is provided at the opening 12, and the split body 20 comprises two check plates 21 for opening / closing the first exhaust hole 11. Of course, the check plates 21 may also be of other numbers. Among them, the width of the check piece 21 is greater than the height of the split body 20, and the opening angle of one check piece 21 relative to the other check piece 21 is a, 0°≤a≤180°, that is, one of the check pieces 21 can be flipped from the state of closing the first exhaust hole 11 to overlap with the other check piece 21, and the overlapping thickness of the two check pieces 21 is less than the width of the opening 12 of the main body 10; when the split body 20 is being pulled out, when the side corresponding to the opening angle of the check piece 21 is greater than the opening width of the main body 10, the withdrawal force causes the check piece 21 close to the opening 12 to act on the inner wall of the main body 10 and flip and overlap to the other check piece 21 and be pulled out from the opening 12. Of course, when the two check pieces 21 are provided with a force member, the overlapping thickness of the two check pieces 21 includes the thickness of the force member, that is, the overlapping thickness of the two check pieces 21 with other force members after being overlapped.

[0051] Reference Figure 2Since the outer cross section of the main body 10 is circular, the cross section of the first exhaust hole 11 is semicircular, and there are two first exhaust holes 11, which are symmetrically arranged along the center of the main body 10. Of course, when the outer cross section of the main body 10 changes, the cross section of the first exhaust hole 11 can also change accordingly. The outer cross section of the main body 10 can also be rectangular or symmetrically shaped. Similarly, the cross section of the first exhaust hole 11 can also be rectangular or symmetrically shaped, etc. Here, symmetrically shaped means that the shape is irregular, but at the same time symmetrical, which is convenient for the subsequent symmetrical arrangement of the two check plates 21.

[0052] In this embodiment, there are two first exhaust holes 11, that is, double holes. As an alternative, the first exhaust hole 11 may also be a single hole or multiple holes.

[0053] In this embodiment, the first exhaust hole 11 is a linear through hole, that is, it is arranged to penetrate along the axis of the main body 10. Of course, the first exhaust hole 11 can also be a curved through hole, or a variable diameter through hole.

[0054] like Figure 2 As shown, the opening 12 is arranged along the radial direction of the main body 10, and is perpendicular to and connected with the first exhaust hole 11. Of course, the opening 12 and the first exhaust hole 11 can also be arranged at an angle. The split body 20 extends into and is fixed in the opening 12 from one end of the opening 12. After installation, a sealing gasket (not shown in the figure) is provided at the joint between the check plate 21 and the first exhaust hole 11; or, a sealing gasket is provided at the sealing surface of the main body 10 corresponding to the end of the check plate 21. In this way, it is ensured that the check plate 21 has a better sealing effect on the main body 10.

[0055] In this embodiment, the two check plates 21 of the exhaust valve are in a closed state under normal conditions by a force member (not shown in the figure), and the force member can be at least one of gravity, magnetism, elasticity or electric power. When the fan is turned on, the check plate 21 is blown open to exhaust into the exhaust duct. When the fan is turned off, the check plate 21 is in a closed state, thereby preventing the smoke in the exhaust duct from flowing back into the room. When the exhaust valve is installed horizontally, the check plate 21 can generally be closed by its own gravity. When the sealing requirement is higher, an elastic member or a permanent magnetic force or electromagnetic force or elasticity or electric force member can be further provided on the split body and / or the check plate 21 to assist in pressure, so that the sealing effect of the fitting surface between the check plate 21 and the exhaust duct is better. When the exhaust valve is installed vertically, the check plate 21 is in a normally closed state by a permanent magnetic force or electromagnetic force or elasticity or electric force member. In order to further improve the sealing effect, in this embodiment, a sealing gasket is also provided at the fitting place between the opening 12 of the main body 10 and the split body 20.

[0056] Reference Figures 3 to 5 , the two check plates 21 rotate through the same rotating shaft 30. Of course, the two check plates 21 can also rotate through independent rotating shafts 30, or rotate by hinged connection through convex-concave matching structures.

[0057] In this embodiment, preferably, the two check plates 21 are symmetrically arranged with the rotating shaft 30 as the center. Of course, they can also be arranged as an asymmetrical structure.

[0058] Moreover, in this embodiment, the split body 20 is provided with a second exhaust hole 25 connected with the first exhaust hole 11, the second exhaust hole 25 is a single hole, and two check plates 21 are provided in the second exhaust hole 25. The two check plates 21 cover the two semicircular holes of the first exhaust hole 11, and also close the second exhaust hole 25. When the first exhaust hole 11 is a single hole, the second exhaust hole 25 can be a double hole, and the two check plates 21 of the split body cover the double holes of the second exhaust hole 25, thereby also achieving the effect of closing the first exhaust hole 11 (not shown). Of course, the exhaust holes of the split body 20 or the main body 10 can be double holes or multiple holes, and the check plates 21 cover the exhaust holes of the main body or / and the split body accordingly.

[0059] In this embodiment, a handle 22 is further provided on one side of the split body 20 . When the split body 20 is installed at the opening 12 , the handle 22 is located outside the main body 10 , so that the split body 20 can be easily pulled out through the handle 22 .

[0060] Reference Figures 5 to 8 In this embodiment, the width of the check piece 21 is greater than the height of the split body 20. Figure 5 As shown, the two check plates 21 are closed, closing the first exhaust hole 11 and the second exhaust hole 25 at the same time, and the angle a between the two check plates 21 is 180°. Figure 6 As shown, when the fan is turned on, the two check plates 21 can be relatively opened to exhaust air, such as Figure 7 As shown, the thickness of the two check pieces 21 is smaller than the width of the opening 12 of the main body 10; when the split body 20 is being pulled out, when the side corresponding to the opening angle of the check piece 21 is larger than the opening width of the main body 10, the pull-out force causes the check piece 21 close to the opening 12 to act on the inner wall of the main body 10 and flip and overlap onto the other check piece 21 (as shown in FIG. Figure 8 As shown, at this time, the angle a between the two check pieces 21 is ≈ 0°), and the check pieces 21 are pulled out from the opening 12. It can be seen from this that when being pulled out, the pulling force will cause the two check pieces 21 to be in an overlapping state, so the check piece 21 of the split body 20 can be pulled out from the opening 12 for cleaning, maintenance or replacement under the action of the pulling force at any angle of oil adhesion, breaking the limitation that the check piece 21 of the existing valve structure design can only be pulled out from the main body opening when the side length corresponding to the closing or opening angle is less than the width of the main body opening.

[0061] Embodiment 2

[0062] Reference Figures 9 to 16 The difference between the second embodiment and the first embodiment is that the two check plates 21 are respectively hinged to the split body 20 through independent rotating shafts 30, and the two rotating shafts 30 are parallel to each other. The other structures and functions of this embodiment are the same as those of the first embodiment, and will not be described here.

[0063] Embodiment 3

[0064] Reference Figures 17 to 24 The difference between the third embodiment and the first embodiment is that the two ends of the two check pieces 21 are respectively provided with protrusions 23, and the corresponding parts of the split body 20 are respectively provided with grooves 24, and the two protrusions 23 are respectively hinged in the two grooves 24, so that the two check pieces 21 are hinged on the split body 20. Moreover, when the check piece 21 near the opening 12 is turned over and overlapped with another check piece 21, the protrusion 23 of the check piece 21 can move upward in the groove 24, so that the check piece 21 can be smoothly overlapped on the other check piece 21.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A removable exhaust valve for preventing smoke odor from flowing back, comprising a main body with a first exhaust hole, an opening provided on the main body, a split body which can be inserted / extracted at the opening, the split body comprising at least two check plates for opening / closing the first exhaust hole, characterized in that: The width of the check plate is greater than the height of the split body; the opening angle of one of the check plates relative to the other check plate is a, 0°≤a≤180°; the overlapping thickness of the two check plates or the overlapping thickness of the two check plates after overlapping with other force-applying members is less than the opening width of the main body; during the extraction process of the split body, when the side corresponding to the opening angle of the check plate is greater than the opening width of the main body, the extraction force causes the check plate close to the opening to act on the inner wall of the main body and flip over to overlap on the other check plate and be extracted from the opening.

2. The removable exhaust valve for preventing smoke odor backflow according to claim 1 is characterized in that: The outer cross section of the main body is circular, rectangular or symmetrical.

3. The removable exhaust valve for preventing smoke odor backflow according to claim 1 is characterized in that: The first exhaust hole of the main body is a single hole, a double hole or a plurality of holes.

4. The removable exhaust valve for preventing smoke odor backflow according to claim 1 is characterized in that: A sealing gasket is provided at the joint between the check piece and the first exhaust hole; or a sealing gasket is provided at the sealing surface of the main body corresponding to the end of the check piece.

5. The removable exhaust valve for preventing smoke odor backflow according to claim 1 is characterized in that: The check plate is closed by at least one of gravity, magnetism, elasticity or electric force.

6. The removable exhaust valve for preventing smoke odor backflow according to claim 1 is characterized in that: The two check plates are hinged on the same rotating shaft, or rotate on their own independent rotating shafts or rotate by hinged connection through convex-concave matching.

7. The withdrawable exhaust valve for preventing smoke odor backflow according to claim 1 is characterized in that: The split body is provided with a second exhaust hole connected to the first exhaust hole, the second exhaust hole is a single hole, a double hole or a plurality of holes, and the check plate is opened / closed corresponding to the first exhaust hole of the main body or the second exhaust hole of the split body.

8. The withdrawable exhaust valve for preventing smoke odor backflow according to claim 1 is characterized in that: A sealing gasket is arranged at the joint between the opening of the main body and the split body.

9. The withdrawable exhaust valve for preventing smoke odor backflow according to claim 1 is characterized in that: The opening and the first exhaust hole are arranged perpendicularly or obliquely to each other.

10. The withdrawable exhaust valve for preventing smoke odor backflow according to claim 1, characterized in that: A handle is provided on the split body and located on the outer side of the main body.

Images