CN211117839U

CN211117839U - Fire-proof valve for range hood

Info

Publication number: CN211117839U
Application number: CN201921339618.5U
Authority: CN
Inventors: 王登强; 田涛; 茅忠群; 诸永定
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2020-07-28
Anticipated expiration: 2029-08-16

Abstract

The utility model relates to a fire prevention valve for range hood, including the body that has smoke exhaust passage, smoke exhaust passage's first end has the inlet flue that is used for with range hood's air outlet phase fluid intercommunication, its characterized in that: the second end face of the smoke exhaust channel is closed, and the side wall of the smoke exhaust channel, which is adjacent to the second end face, is provided with at least one smoke exhaust port which is used for being in fluid communication with the common flue and is provided with a valve plate which can be opened and closed. The utility model discloses a valve block is not located the discharge flue, has reduced in the discharge flue oil smoke accumulation on the valve block, and exhaust port border greasy dirt flows downwards under the action of gravity, has reduced to receive the pollution and the degree of being stuck between valve block and the exhaust port border to under range hood is in normal operating condition, the exhaust port can be opened more easily to the effect downstream of valve block oil smoke in the discharge flue, realizes the discharge of the interior oil smoke of discharge flue, has reduced opening the degree of difficulty of valve block promptly.

Description

Fire-proof valve for range hood

Technical Field

The utility model belongs to the technical field of range hood, concretely relates to fire prevention valve for range hood.

Background

At present, a common flue is generally used in a household building, and oil smoke exhausted by a range hood of each household enters the common flue from the range hood and then is exhausted from the upper part of the house.

For example, the present applicant's earlier filed chinese utility model patent "a fire damper for range hood" (patent No. CN201820857187.0, publication No. CN208535256U) provides a fire damper for range hood, which comprises a valve body with an air inlet, a fusing component, and a first valve plate and a second valve plate rotatably disposed on the valve body, wherein the first valve plate and the second valve plate rotate in the same rotating direction to open or close the air inlet, the valve body is respectively provided with a first closing member for closing the first valve plate and a second closing member for closing the second valve plate, the first closing member and the second closing member are fixed on the valve body through a common fusing component and separated from the corresponding valve plates in a normal state, the first closing member and the second closing member are respectively connected with corresponding elastic members and separated from the fusing component in a fusing state, and move towards the same direction under the action of the corresponding elastic piece, and further drive the corresponding valve plate to rotate so that the air inlet tends to be closed.

In the patent, a first valve plate and a second valve plate are arranged in a valve body of the fireproof valve, and the first valve plate and the second valve plate are matched with each other to close or open an air inlet, when the range hood works, because the pressure difference in the valve body is reduced, the other valve plate can not be normally opened, at the moment, the range hood has poor oil smoke absorption effect and can not be opened due to the reduction of the air outlet area, the actual opening angle of the valve plates is limited, the fluency of smoke discharge is greatly reduced, and the resistance of a flue is increased; the first valve plate and the second valve plate are arranged in the valve body, and oil stains are easy to accumulate on the inner wall of the channel when oil stains pass through the oil smoke channel in the valve body, so that the first valve plate and the second valve plate are easy to be corroded by the oil smoke and adhered to the inner wall of the channel, and particularly, the valve body is full of the oil stains in the long-term working process, so that the opening difficulty of the other valve plate is increased; when the range hood is closed, one valve plate is closed in advance due to uneven external resistance, and when the other valve plate is closed, poor sealing can occur, so that oil smoke in a flue is poured into a kitchen of a user, and the kitchen environment is affected.

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

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to the current situation of above-mentioned prior art, a fire prevention valve for range hood that the valve block was easily opened under range hood was in operating condition is provided.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a fire prevention valve for range hood, includes the body that has the exhaust fume channel, the first end of exhaust fume channel has the inlet flue that is used for with the air outlet fluid intercommunication of range hood, its characterized in that: the second end face of the smoke exhaust channel is closed, and the side wall of the smoke exhaust channel, which is adjacent to the second end face, is provided with at least one smoke exhaust port which is used for being in fluid communication with the common flue and is provided with a valve plate which can be opened and closed.

The smoke exhaust port is located on the outer side of the valve body, and the number of the smoke exhaust ports is two, and the two smoke exhaust ports are respectively arranged on the opposite side walls of the smoke exhaust channel.

In order to ensure that the two valve plates can close the corresponding smoke exhaust port under the action of self gravity when the range hood is in a non-working state, the upper part of the valve plates is provided with a rotating shaft which is arranged at a position adjacent to the upper edge of the corresponding smoke exhaust port and is parallel to the axial direction of the pipe body, and in a natural state, the valve plates cover the smoke exhaust port.

In order to guide the oil dirt accumulated on the inner wall of the valve plate to the lower part of the valve plate conveniently and reduce the accumulation of the oil dirt on the inner wall of the valve plate, the valve plate is an arc-shaped piece protruding outwards.

When the range hood is in a non-working state, the valve plate can conveniently close the corresponding smoke outlet by means of gravity, the section of the valve plate is C-shaped, and when the valve plate is in a closed state, an included angle formed by a connecting line AB between a top point A and a lower end point B of the section and a vertical line AC passing through the top point A is α degrees and is 30 degrees.

In order to better guide the oil stain on the inner wall of the valve plate, the lower part of the arc-shaped piece is semicircular, and the lower edge of the arc-shaped piece is an arc-shaped edge protruding downwards.

In order to be in under the closed condition at the oil absorption machine, the valve block can the quick closure correspond the exhaust port, correspond each the valve block outside the body and the outside of valve block pivot is provided with the depression bar unanimous with the extending direction of pivot, the lateral wall of body is in correspondence the position at depression bar both ends is provided with the arc strip that extends along body circumferential direction respectively, sets up on this arc strip and holds the tip that corresponds the depression bar and at wherein relative slip's arc wall still be connected with the elastic component on the depression bar, this elastic component makes the depression bar have all the time along the arc wall towards the gliding trend of the direction of keeping away from the valve block pivot.

In order to automatically close the smoke outlet when the flue is in a fire state and prevent oil smoke from reversely flowing into a kitchen of a user, the elastic part is a tension spring arranged in the arc-shaped groove, a first end of the tension spring is connected with the corresponding pressure rod, and a second end of the tension spring is connected with a second end part of the arc-shaped groove, which is far away from the valve plate rotating shaft; meanwhile, the arc-shaped strip is also provided with a fuse link at the position adjacent to the valve plate rotating shaft, and the fuse link blocks the side edge of the corresponding pressure rod, so that the pressure rod overcomes the pulling force of the corresponding tension spring and is limited at the first end part of the arc-shaped groove adjacent to the valve plate rotating shaft.

In order to reliably pull the pressure rods and enable the pressure rods to slide in the corresponding arc-shaped grooves, each pressure rod is correspondingly provided with two tension springs which are respectively arranged in the arc-shaped grooves at two ends of the pressure rod.

Compared with the prior art, the utility model discloses a flue gas channel for range hood's fire prevention valve has seted up the exhaust port on the lateral wall of neighbouring closed end face, the valve block sets up on the exhaust port of the lateral wall of flue gas channel, and not lie in the flue gas channel, the oil smoke in the flue gas channel is reduced and is gathered on the valve block, the oil stain in flue gas channel border flows downwards under the action of gravity, the degree of pollution between valve block and the exhaust port border is reduced, the degree of sticking between valve block and the exhaust port is reduced promptly, thereby under range hood is in normal operating condition, the valve block can open the exhaust port more easily under the effect of the oil smoke in the flue gas channel motion, realize the discharge of the oil smoke in the flue gas channel, promptly reduced the degree of difficulty of opening of valve block; the two valve plates are arranged on the side wall of the smoke exhaust channel and are not interfered with each other, so that the two valve plates are prevented from being stuck due to oil smoke pollution; in addition, the arc setting of valve block has reduced the accumulation of greasy dirt at the valve block inner wall.

Drawings

Fig. 1 is a schematic structural view of a smoke outlet of a fire damper according to an embodiment of the present invention in an open state;

FIG. 2 is a schematic view of a portion of the structure of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is a schematic structural view of a smoke outlet of the fire damper according to an embodiment of the present invention in a closed state;

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

FIG. 6 is a cross-sectional view of FIG. 5;

fig. 7 is a schematic structural diagram of a valve plate according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 7, the fire damper for a range hood according to an embodiment of the present invention includes a pipe body 1 having a smoke exhaust channel 11, a pressure bar 3, an arc-shaped strip 4 and an elastic member. The outer side wall of the pipe body 1 is provided with a mounting rack 6 used for being mounted on the wall of a user flue.

As shown in fig. 1 and fig. 2, the first end of the smoke exhaust channel 11 has a smoke inlet 111 for fluid communication with the air outlet of the range hood, the smoke inlet 111 of the smoke exhaust channel 11 is connected with the air outlet of the range hood through a smoke tube 7, the second end face of the smoke exhaust channel 11 is closed, at least one smoke exhaust port 112 for fluid communication with the common flue is disposed on the side wall of the smoke exhaust channel 11 adjacent to the second end face, a valve plate 2 for opening and closing the smoke exhaust port 112 is rotatably disposed on the smoke exhaust port 112, and in addition, the valve plate 2 can be slidably disposed at a position of the pipe body corresponding to the smoke exhaust port 112 relative to the pipe body 1 to open and close the corresponding smoke exhaust port 112.

As shown in fig. 1 to 3, in this embodiment, two smoke outlets 112 are provided and are respectively disposed on the opposite side walls of the smoke exhaust channel 11, and each smoke outlet 112 is provided with the above-mentioned valve plate 2, so that there are two valve plates 2. The upper part of each valve plate 2 is provided with a rotating shaft 13, the rotating shaft 13 is arranged at a position adjacent to the upper edge 21 of the corresponding smoke exhaust port 112 and is parallel to the axial direction of the pipe body 1, and in a natural state, each valve plate 2 covers the corresponding smoke exhaust port 112.

The two valve plates 2 are arc-shaped plates protruding outwards, the arrangement of the arc-shaped plates facilitates guiding oil dirt accumulated on the inner walls of the valve plates to the lower portions of the valve plates, specifically, the section of each valve plate 2 is C-shaped, an included angle formed between a connecting line AB between a vertex A and a lower end point B of the section and a vertical line AC passing through the vertex A is α degrees when the valve plates 2 are in a closed state, the lower portions of the arc-shaped plates are semi-circular, the lower edges 22 of the arc-shaped plates are arc-shaped edges protruding downwards, the upper edges 21 of the arc-shaped plates are straight edges, and referring to the arrangement of an included angle α shown in fig. 1, when the range hood is in the closed state, the two valve plates 2 can rotate under the action of self gravity to close respective smoke exhaust ports 112.

As shown in fig. 1 to 6, corresponding to each valve plate 2, two pressure rods 3 are arranged outside the pipe body 1 and outside the valve plate rotating shaft 13, and the extending direction of the pressure rods 3 is the same as that of the rotating shaft 13; the outer side wall of body 1 is provided with respectively along the arc strip 4 that body 1 circumferential direction extends in the position that corresponds depression bar 3 both ends, sets up on this arc strip 4 and can hold the tip that corresponds depression bar 3 in wherein arc groove 41 of relative slip to still be connected with the elastic component on depression bar 3, this elastic component makes depression bar 3 have the arc groove 41 on edge all the time towards the gliding trend of direction of keeping away from valve block pivot 13, see specifically that fig. 3 shows. The arc-shaped groove 41 extends along the circumferential direction of the tube body 1; the elastic part is a tension spring 5 arranged in the arc-shaped groove 41, and each pressure lever 3 is provided with two tension springs correspondingly and respectively arranged in the arc-shaped grooves 41 at two ends of the pressure lever 3. A first end of each tension spring 5 is connected with the corresponding pressure rod 3, and a second end of each tension spring 5 is connected with a second end part of each arc-shaped groove 41 far away from the valve plate rotating shaft 13; meanwhile, the arc-shaped strip 4 is further provided with a fuse link 113 at a position adjacent to the valve sheet rotating shaft 13, and the fuse link 113 blocks the side edge of the corresponding pressure lever 3, so that the pressure lever 3 overcomes the pulling force of the corresponding tension spring 5 and is limited at the first end part of the arc-shaped groove 41 adjacent to the valve sheet rotating shaft 13. The fuse link 113 is disposed in the arc-shaped groove 41, and the end of the pressing rod 3 is limited in the corresponding arc-shaped groove 41 by the fuse link 113. The working process of the fire damper for the range hood of the embodiment is as follows:

as shown in fig. 1 to 3, when the range hood is in a normal working state, the valve plate 2 opens the smoke outlet 112 under the blowing of the oil smoke flow, specifically, as shown in fig. 3, the oil smoke flow is discharged into the common flue through the smoke outlet 112, at this time, the temperature is not significantly changed or does not reach the fusing temperature of the fusing sheet 113, and the end of the pressure lever 3 is blocked in the corresponding arc-shaped groove 41 by the fusing sheet 113; as shown in fig. 4 to 6, when the public flue is on fire, the fuse link 113 is in a fused state, the press rod 3 slides along the arc-shaped groove 41 under the action of the tension of the corresponding tension spring 5 in the direction away from the valve plate rotating shaft 13, and presses the corresponding valve plate 2 to rotate towards the smoke outlet 112, so as to forcibly close the smoke outlet 112 and block the smoke exhaust channel 11, specifically referring to fig. 6, so as to prevent the oil smoke from flowing backwards into the kitchen of the user.

Claims

1. A fire damper for a range hood, comprising a pipe body (1) having a smoke evacuation channel (11), a first end of the smoke evacuation channel (11) having a smoke inlet (111) for fluid communication with an air outlet of the range hood, characterized in that: the second end face of the smoke exhaust channel (11) is closed, and the side wall of the smoke exhaust channel (11) adjacent to the second end face is provided with at least one smoke exhaust port (112) which is used for being in fluid communication with a common flue and is provided with a valve plate (2) which can be opened and closed.

2. The fire damper of claim 1, wherein: the two smoke exhaust ports (112) are respectively arranged on the opposite side walls of the smoke exhaust channel (11).

3. The fire damper of claim 2, wherein: each valve plate (2) is provided with a rotating shaft (13) at the upper part of the valve plate, the rotating shaft (13) is arranged at the position close to the upper edge of the corresponding smoke exhaust port (112) and is parallel to the axial direction of the pipe body (1), and in a natural state, the valve plates (2) cover the smoke exhaust port (112).

4. A fire damper as claimed in claim 3, wherein: the valve plate (2) is an arc-shaped plate protruding outwards.

5. A fire damper according to claim 4, characterized in that the cross-section of the valve plate (2) is C-shaped, and in the closed state of the valve plate (2), the angle formed between the line AB connecting the top point A and the lower end point B of the cross-section and the vertical line AC passing through the top point A is α to be 30 °.

6. The fire damper of claim 4, wherein: the lower edge (22) of the arc-shaped sheet is an arc-shaped edge protruding downwards.

7. A fire damper according to any one of claims 3 to 6, wherein: correspond each valve block (2) outside body (1) and be in the outside of valve block pivot (13) is provided with depression bar (3) unanimous with the extending direction of pivot (13), the lateral wall of body (1) is in correspondence the position at depression bar (3) both ends is provided with arc strip (4) that extend along body (1) circumference direction respectively, sets up tip that can hold corresponding depression bar (3) on this arc strip (4) and wherein arc wall (41) of relative slip, and still be connected with the elastic component on depression bar (3), this elastic component makes depression bar (3) have all the time and follow arc wall (41) towards the gliding trend of the direction of keeping away from valve block pivot (13).

8. The fire damper of claim 7, wherein: the elastic part is a tension spring (5) arranged in the arc-shaped groove (41), the first end of the tension spring (5) is connected with the corresponding pressure lever (3), and the second end of the tension spring (5) is connected with the second end part, far away from the valve plate rotating shaft (13), of the arc-shaped groove (41); meanwhile, the arc-shaped strip (4) is also provided with a fuse link (113) at a position adjacent to the valve plate rotating shaft (13), and the fuse link (113) blocks the side edge of the corresponding pressure lever (3), so that the pressure lever (3) overcomes the pulling force of the corresponding tension spring (5) and is limited at the first end part of the arc-shaped groove (41) adjacent to the valve plate rotating shaft (13).

9. The fire damper of claim 8, wherein: each pressure lever (3) is correspondingly provided with two tension springs which are respectively arranged in the arc-shaped grooves (41) at the two ends of the pressure lever (3).