阅读说明：本技术 一种用于吸油烟机的防火阀 (Fire-proof valve for range hood ) 是由 唐进鑫 叶丰 于 2018-08-01 设计创作，主要内容包括：本发明涉及一种用于吸油烟机的防火阀,包括有阀体和阀片,所述阀体上开有通风口,所述阀片能相对所述阀体转动,并能封住该通风口,以及能使所述阀片趋于恢复为封住通风口的关闭状态的第一弹性件,所述的第一弹性件设置在位于阀体上油烟流出的那一侧上,也即阀体的外侧面上,并且处于所述通风口的外围,另外还包括有能驱动阀片趋于关闭状态的驱动机构,所述第一弹性件的作用端作用在所述驱动机构的第一端,所述驱动机构的第二端与所述阀片相连。其第一弹性件不受转轴和阀片之间空间的限制,在通风口关闭的过程中,增加了对阀片的压力,使得阀片与阀体更加紧密贴合,从而防止倒灌；同时防止第一弹性件和第二弹性件受到污染。(The invention relates to a fireproof valve for a range hood, which comprises a valve body and a valve plate, wherein a vent hole is formed in the valve body, the valve plate can rotate relative to the valve body and can seal the vent hole, a first elastic part which can enable the valve plate to tend to restore to a closed state for sealing the vent hole is arranged on one side, out of which oil smoke flows, of the valve body, namely the outer side surface of the valve body and is positioned on the periphery of the vent hole, the fireproof valve further comprises a driving mechanism which can drive the valve plate to tend to be in the closed state, the action end of the first elastic part acts on the first end of the driving mechanism, and the second end of the driving mechanism is connected with the valve plate. The first elastic piece is not limited by the space between the rotating shaft and the valve plate, and the pressure on the valve plate is increased in the closing process of the vent, so that the valve plate is more tightly attached to the valve body, and backflow is prevented; while preventing the first and second elastic members from being contaminated.)

1. The utility model provides a fire prevention valve for range hood, including valve body (1) and valve block (2), it has vent (13) to open on valve body (1), valve block (2) can be relative the valve body rotates to can seal this vent (13), and enable valve block (2) tend to resume first elastic component (4) for sealing the closed condition of vent (13), its characterized in that: first elastic component (4) set up on being located that side that the oil smoke flows out on valve body (1) (also on the lateral surface) to be in the periphery of vent (13), still including in addition can drive actuating mechanism that valve block (2) tend to the closed condition, the effect end of first elastic component (4) is in actuating mechanism's first end, actuating mechanism's second end with valve block (2) link to each other.

2. The fire damper for a range hood according to claim 1, wherein: a support (11) is arranged on the valve body (1) adjacent to the ventilation opening (13), and the first elastic piece (4) is arranged on the support (11).

3. The fire damper for a range hood according to claim 2, wherein: the driving mechanism comprises a driving plate (31), a cam (32), a connecting shaft (33) and a connecting frame (34), wherein a first surface of the driving plate (31) is abutted to an acting end of the first elastic piece (4), a second surface of the driving plate is abutted to the cam (32), the cam (32) is arranged on the connecting shaft (33) in a penetrating mode and moves synchronously with the connecting shaft (33), two ends of the connecting shaft (33) are connected to two side plates (111) of the support (11) in a rotating mode respectively, the connecting shaft (33) is a rotating shaft of the valve plate (2), a first end (341) of the connecting frame (34) is fixed relative to the connecting shaft (33), and a second end (342) of the connecting frame (34) is connected with the valve plate (2).

4. The fire damper for a range hood according to claim 3, wherein: the first elastic piece (4) is a spring, the first end of the first elastic piece is installed on the support (11), and the second end of the first elastic piece is an acting end which is abutted against the first surface of the driving plate (31).

5. The fire damper for a range hood according to any one of claims 1 to 4, wherein: valve block (2) are provided with fixing base (22) on the lateral surface, second end (342) of link (34) articulate in on fixing base (22).

6. The fire damper for the range hood according to claim 5, wherein the maximum angle α of the rotation range of the connecting frame (34) relative to the fixed seat (22) is 5 degrees.

7. The fire damper for a range hood according to claim 1, wherein: in the natural state after installation, the valve body (1) and the valve plate (2) are vertical, and the rotating shaft of the valve plate (2) is positioned in the middle or on the upper part or above.

8. The fire damper for a range hood according to claim 1, wherein: the edge part of valve block (2) installs sealing member (5) have on the terminal surface towards valve body (1) with valve body (1) vent (13) looks sealing fit's wedge face (52).

9. The fire damper for a range hood according to claim 8, wherein: the periphery wall of valve block (2) is equipped with outside extension's edge of inserting (21), correspondingly, offer on the internal perisporium of sealing member (5) and supply edge of inserting (21) to insert recess (51) wherein, sealing member (5) are installed through the cooperation of recess (51) and edge of inserting (21) on valve block (2).

10. The fire damper for a range hood according to claim 1, wherein: the outside of valve body (1) is provided with fusing subassembly (7) and is located driving piece (6) on fusing subassembly (7), be connected with second elastic component (61) on driving piece (6) and be in fusing state and break away from fusing subassembly (7) under fusing subassembly (7) to move under the effect of second elastic component (61) and rotate with drive valve block (2) and then make vent (13) of valve body (1) tend to close.

11. The fire damper for a range hood of claim 10, wherein: the second elastic piece (61) is positioned at the periphery of the ventilation opening (13) of the valve body (1).

12. The fire damper for a range hood according to claim 11, wherein: second elastic component (61) is the extension spring, driving piece (6) are shaft-like, two blocks of curb plates (12) of relative setting are installed in the outside of valve body (1), offer guide way (121) that correspond with driving piece (6) on every curb plate (12), the both ends of driving piece (6) can be respectively slided spacing in guide way (121) that correspond curb plate (12), just the both ends of extension spring are fixed respectively and are exposed on the tip outside guide way (121) in driving piece (6).

Technical Field

The invention relates to a fire damper, in particular to a fire damper for a range hood.

Background

The oil smoke exhaust outlet of each household kitchen of the resident of the existing building is communicated with a smoke exhaust channel which is communicated up and down, and in order to prevent the oil smoke in the smoke exhaust channel from flowing back into the kitchen, a device such as a flue check valve is arranged between the air outlet pipe orifice of the smoke exhaust ventilator and the public smoke exhaust channel.

The existing flue check valve generally comprises an oil smoke channel formed by a shell, the oil smoke channel is provided with an air inlet and an air outlet which are opposite, the air inlet is connected with an air outlet pipe orifice of the range hood, the air outlet extends into a public flue gas channel, a valve plate which can be opened and closed is arranged at the air outlet of the oil smoke channel, for example, the Chinese utility model patent with the prior patent number of CN201520804070.2 (the publication number is CN205064971U) of the applicant, namely a fire damper of a flue for an oil smoke machine, the fire damper can be forcibly closed when the temperature of the smoke in the common flue is in a high emergency state, but when the range hood at the user side is not used, namely the range hood is not in operation, the fire prevention valve is closed by the gravity of the valve plate, but the mode of completely depending on the dead weight of the valve plate can prevent the fire prevention valve from reaching the completely closed effect, so that the situation of oil smoke flowing backwards can occur.

In order to solve the technical problem, if the applicant previously applied for chinese utility model patent "a monolithic valve flue fire prevention check valve" with patent number CN201721338030.9 (No. CN207246494U), this monolithic valve flue fire prevention check valve is in install the valve body support on the lateral surface of valve body install connecting pin on the valve body support install the valve block support on the connecting pin, the valve block is adorned on the valve block support install between connecting pin and the valve block and make the valve block keep the return spring who closes the trend. Although return spring's existence has increased the pressure to the valve block in this patent, thereby make the valve block keep having the trend of closing the air intake under self gravity and return spring effect, however, return spring sets up between connecting pin axle and valve block, it is limited to probably make return spring's the size that sets up, make return spring's restoring force little, thereby the pressure of acting on the valve block is less, it is little with the laminating degree of valve body under the closing status to make the valve block be in the lampblack absorber, and then probably can make the fire prevention valve can not reach totally enclosed effect, and simultaneously, when range hood opened, return spring has the oil smoke passageway that the part is located the valve body, long-time after using, can make return spring receive the pollution of tobacco tar, thereby can influence the closing of valve block.

Therefore, a need exists for further improvements to existing fire dampers for range hoods.

Disclosure of Invention

The first technical problem to be solved by the invention is to provide a fire damper for a range hood, which can ensure that a valve plate is tightly attached to a valve body when the range hood is closed and can prevent a first elastic part from being polluted when the range hood is opened, aiming at the current situation of the prior art.

The second technical problem to be solved by the present invention is to provide a fire damper for a range hood, which can ensure that a vent of a valve body is reliably closed in an emergency, in view of the current situation of the prior art.

The technical scheme adopted by the invention for solving the first technical problem is as follows: the utility model provides a fire prevention valve for range hood, including valve body and valve block, it has the vent to open on the valve body, the valve block can be relative the valve body rotates to can seal this vent, and enable the valve block tends to resume the first elastic component for sealing the closed condition of vent, its characterized in that: the first elastic piece is arranged on the side (namely the outer side surface) where oil smoke flows out on the valve body and is positioned on the periphery of the ventilation opening, the first elastic piece further comprises a driving mechanism capable of driving the valve plate to tend to be in a closed state, the action end of the first elastic piece acts on the first end of the driving mechanism, and the second end of the driving mechanism is connected with the valve plate.

In order to facilitate the installation of the first elastic member, a bracket is preferably disposed on the valve body adjacent to the vent, and the first elastic member is disposed on the bracket.

The driving mechanism has various structural forms, preferably, the driving mechanism comprises a driving plate, a cam, a connecting shaft and a connecting frame, a first surface of the driving plate abuts against the action end of the first elastic piece, a second surface of the driving plate abuts against the cam, the cam penetrates through the connecting shaft and moves synchronously with the connecting shaft, two ends of the connecting shaft are respectively rotatably connected to two side plates of the support, the connecting shaft is a rotating shaft of the valve plate, a first end of the connecting frame is relatively fixed with the connecting shaft, and a second end of the connecting frame is connected with the valve plate. Therefore, the close fit between the valve plate and the valve body is increased by the matching of the first elastic piece and the cam, so that the backflow is prevented.

The first elastic member may have various structural forms, may take the form of a torsion spring, and may also take other forms.

In order to prevent the connecting frame from deforming because the valve plate rotates frequently, a fixed seat is arranged on the outer side surface of the valve plate, and the second end of the connecting frame is hinged on the fixed seat. Therefore, on one hand, the valve plate rotates to a certain degree relative to the connecting frame, namely, the connecting frame rotates to a certain degree relative to the fixed seat, and therefore the service life of the connecting frame is prolonged; on the other hand, the valve block has certain rotation relative to the link, can guarantee to be in under the fire prevention valve is in not working condition valve block and valve body on the coplanar and reach better sealed effect, and then prevent to flow backward.

Preferably, the maximum angle α of link relative fixing base rotation range is 5 degrees like this, and the rotation of small angle can guarantee that the link applies pressure to the valve block under the reset action of first elastic component when preventing the link deformation to guarantee the inseparable laminating of valve block and valve body.

In order to better enable the valve plate to close the vent of the valve body under the action of gravity, preferably, in a natural state after installation, the valve body and the valve plate are vertical, and the rotating shaft of the valve plate is positioned in the middle or on the upper part or above the middle.

In order to realize the sealing connection of the valve plate and the valve body, a sealing element is arranged at the edge part of the valve plate, and a wedge-shaped surface which is in sealing fit with the vent of the valve body is arranged on the end surface of the sealing element facing the valve body. Thus, the close fit of the sealing member to the valve body is increased. In order to realize the installation of the sealing element and the valve plate, preferably, an insertion edge extending outwards is arranged on the outer peripheral wall of the valve plate, correspondingly, a groove for inserting the insertion edge is formed in the inner peripheral wall of the sealing element, and the sealing element is installed on the valve plate through the matching of the groove and the insertion edge.

The technical scheme adopted by the invention for solving the second technical problem is as follows: the outside of valve body is provided with fusing subassembly and is located the driving piece on the fusing subassembly, be connected with the second elastic component on the driving piece and be in fusing state and break away from fusing subassembly under the fusing subassembly to move under the effect of second elastic component and rotate and then make the vent of valve body tend to close with driving the valve piece.

In order to prevent the second elastic member from being polluted by oil smoke, the second elastic member is positioned at the periphery of the ventilation opening of the valve body.

Further preferably, the second elastic component is a tension spring, the driving component is rod-shaped, two side plates which are arranged oppositely are installed on the outer side of the valve body, a guide groove corresponding to the driving component is formed in each side plate, two ends of the driving component are limited in the guide grooves of the corresponding side plates in a sliding mode respectively, and two ends of the tension spring are fixed on the end portions, exposed out of the guide grooves, of the driving component respectively.

Compared with the prior art, the invention has the advantages that: 1. the first elastic piece of the fireproof valve for the range hood is positioned at the periphery of the oil smoke channel and on the outer side surface of the valve body where oil smoke flows out, the first elastic piece is not limited by the space between the rotating shaft and the valve plate, and the pressure of the first elastic piece on the valve plate is increased in the process of closing the ventilation opening, so that the valve plate rotates under the action of the self gravity and the first elastic piece to better close the ventilation opening, namely the valve plate is more tightly attached to the valve body, and backflow is prevented; meanwhile, the first elastic part is arranged at the periphery of the oil smoke channel, so that oil smoke is prevented from polluting the first elastic part when the range hood works, the first elastic part is further prevented from losing efficacy, the service life of the first elastic part is prolonged, and backflow is effectively and reliably prevented; 2. the driving mechanism comprises a cam, and the cam can not interfere the opening of the valve plate through the matching of the cam and the first elastic piece, so that the valve plate only tends to be in a vertical state, even if the valve plate is tightly attached to the valve body; 3. the second elastic piece is located the periphery of valve body vent to avoid the oil smoke to pollute the second elastic piece, thereby avoid the condition that can't close the vent under emergency because of the second elastic piece became invalid, the reliability improves.

Drawings

FIG. 1 is a sectional view of an assembly structure of a fire damper installed on a smoke pipe of a range hood according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a fire damper according to an embodiment of the present invention;

FIG. 3 is a schematic view of the structure of FIG. 2 at another angle;

FIG. 4 is a schematic diagram of a portion of an embodiment of the present invention;

FIG. 5 is a schematic view of the structure of FIG. 4 at another angle;

FIG. 6 is a schematic view of an assembly structure of a driving mechanism and a bracket according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view of FIG. 6;

FIG. 8 is a schematic view of the connecting frame of FIG. 6 with the connecting frame removed;

FIG. 9 is a cross-sectional view of a seal according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a valve plate according to an embodiment of the present invention;

fig. 11 is an enlarged schematic view of a portion a in fig. 1.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 11, the fire damper for a range hood according to an embodiment of the present invention includes a valve body 1, a valve plate 2, a driving mechanism, a first elastic member 4, a sealing member 5, a fusing member 7, a bottom plate 8, and a flue adapter housing 9, wherein,

the valve body 1 is opened there is vent 13, and valve block 2 can rotate 1 relative valve body to can seal this vent 13, in this embodiment, under the natural state after the installation, valve body 1 and valve block 2 all are vertical, and the 2 pivots of valve block are located its self middle part or upper portion or top.

As shown in fig. 6 to 8, the driving mechanism is used for driving the valve plate 2 to approach to a vertical state, and includes a driving plate 31, a cam 32, a connecting shaft 33 and a connecting frame 34, a first surface of the driving plate 31 abuts against an action end of the first elastic element 4, a second surface abuts against the cam 32, the cam 32 is disposed on the connecting shaft 33 in a penetrating manner and moves synchronously with the connecting shaft 33, two ends of the connecting shaft 33 are respectively rotatably connected to the two side plates 111 of the bracket 11, the connecting shaft 33 is a rotating shaft of the valve plate 2, a first end 341 of the connecting frame 34 is relatively fixed to the connecting shaft 33, a second end 342 of the connecting frame 34 is connected to the valve plate 2, specifically, a fixing seat 22 is disposed on an outer side surface of the valve plate 2, a second end of the connecting frame 34 is hinged to the fixing seat 22, and a maximum angle α of a rotating range of the connecting frame.

The first elastic piece 4 enables the valve plate 2 to tend to recover to a closed state for sealing the vent 13, the first elastic piece 4 is arranged on the side, out of which the oil smoke flows, of the valve body 1, the side, out of which the oil smoke flows, of the valve body 1 is the outer side face of the valve body 1 and is located on the periphery of the vent 13, the action end of the first elastic piece 4 acts on the first end of the driving mechanism, and the second end of the driving mechanism is connected with the valve plate 2. Specifically, the first elastic member 4 can make the valve plate 2 tend to return to the vertical state to close the vent 13, and in addition, a bracket 11 is provided on the valve body 1 adjacent to the vent 13, and the first elastic member 4 is provided on the bracket 11. In particular, the first elastic element 4 is a spring, a first end of which is mounted on the support 11 and a second end of which is an active end, which abuts against the first face of the drive plate 31.

As shown in fig. 9 and 10, a sealing member 5 is mounted on an edge portion of the valve sheet 2, wherein the sealing member 5 is a sealing ring. Specifically, the outer peripheral wall of the valve plate 2 is provided with an insertion edge 21 extending outward, correspondingly, the inner peripheral wall of the sealing element 5 is provided with a groove 51 for inserting the insertion edge 21 therein, and the sealing element 5 is mounted on the valve plate 2 through the matching of the groove 51 and the insertion edge 21. And the end surface of the sealing element 5 facing the valve body 1 is provided with a wedge-shaped surface 52 which is in sealing fit with the vent 13 of the valve body 1, thus better realizing the sealing connection of the valve plate and the valve body, and preventing the reverse smoke from flowing into the smoke when the range hood is closed.

In order to make the fire prevention valve in the public flue gas temperature be in can closing by force under very high emergency, in this embodiment, be provided with fusing subassembly 7 in the outside of valve body 1, be provided with driving piece 6 on this fusing subassembly 7, be connected with second elastic component 61 on driving piece 6 and can break away from fusing subassembly 7 under fusing subassembly 7 is in to move under the effect of second elastic component 61 and rotate with drive valve piece 2 and then make vent 13 tend to close. Specifically, the second elastic member 61 is located at the periphery of the vent 13 of the valve body 1, the second elastic member 61 is a tension spring, the driving member 6 is rod-shaped, two side plates 12 are installed on the outer side of the valve body 1, the guide groove 121 corresponding to the driving member 6 is formed in each side plate 12, two ends of the driving member 6 are respectively slidably limited in the guide grooves 121 of the corresponding side plates 12, and two ends of the tension spring are respectively fixed at the end of the driving member 6 exposed out of the guide grooves 121.

As shown in fig. 1 and 11, the bottom plate 8 is pre-embedded in a wall 14 of a user flue, and four threaded holes are formed around the bottom plate 8. Flue switching dustcoat 9 sets up outside valve body 1, flue switching dustcoat 9 is including dustcoat body 91 and the tobacco pipe connecting portion 92 of tobacco pipe 15 axial extension from dustcoat body 91 one side to user's side, dustcoat body 91 pastes and connects on bottom plate 8 with can dismantling, wherein, the arrow point direction is the flow direction of oil smoke, in this embodiment, dustcoat body 91 is the rectangle transition between bottom plate 8 and the tobacco pipe connecting portion 92, thereby reduced the area that the valve block took the flue, the resistance to the flue after having reduced the valve block and opened, and then effectively reduced the emergence of flue jam condition.

Install fixed bullet on bottom plate 8 and detain 81, be provided with the spacing lug 911 that is used for catching on fixed bullet knot 91 on the lateral wall of dustcoat body 91, detain 81 spacingly when fixed bullet and spacing back on spacing lug 911, dustcoat body 91 is fixed on bottom plate 8, and the installation and the maintenance of easy to assemble workman to the fire prevention valve.