CN114344760B

CN114344760B - Range hood capable of automatically detecting and extinguishing fire

Info

Publication number: CN114344760B
Application number: CN202210172474.9A
Authority: CN
Inventors: 张先平; 熊文海
Original assignee: Nanchang Baiji Pharmaceutical Co ltd
Current assignee: Nanchang Baiji Pharmaceutical Co ltd
Priority date: 2022-02-24
Filing date: 2022-02-24
Publication date: 2022-09-09
Anticipated expiration: 2042-02-24
Also published as: CN114344760A

Abstract

A range hood capable of automatically detecting and extinguishing fire comprises a smoke collecting hood, an air box shell, a screen plate, a filter cover, an impeller and an air duct, wherein an inert gas storage tank is arranged on the smoke collecting hood and is connected with an air inlet of a deflation valve, a deflation valve port of the deflation valve is connected with a deflation annular cavity through a deflation pipe, and a gas injection hole is arranged below the deflation annular cavity; a containing groove is formed in the outer side of an upper air release ring cavity of the smoke collection cover, a fireproof curtain is installed inside the containing groove, a counterweight plate is arranged below the fireproof curtain, an expansion mortise lock is arranged below the counterweight plate, and the fireproof curtain is connected with an air release valve through a trigger mechanism; the fire extinguishing device can monitor the fire by adopting the expansion mortise lock structure to replace the traditional smoke sensor or temperature sensor at the initial stage of the fire of the cooking bench, can extinguish the fire of the fire cooking bench in time after detecting the fire, does not pollute a kitchen in the fire extinguishing process, does not need subsequent excessive cleaning, and has the characteristics of environmental protection and sanitation.

Description

Range hood capable of automatically detecting and extinguishing fire

Technical Field

The invention relates to the technical field of production of range hoods, in particular to a range hood capable of automatically detecting and extinguishing fire.

Background

Extractor hoods have been installed in more and more common household kitchens. When dishes are made, oil is generally required to be heated in a pot, sometimes a person who makes dishes is busy with dish arrangement, the temperature of the oil in the pot is not controlled, the oil is ignited, after the oil is ignited, flame and oil vapor enter a flue of a range hood under the suction force of the range hood and combust the inside of the range hood, more inflammable and explosive objects such as coal gas, oil, flour and the like exist in a kitchen, if the flame is not extinguished in the initial stage of oil combustion, a fire disaster is easily caused, the range hood in the current market has no fire extinguishing function, and in the initial stage of combustion, the range hood does not stop working, the suction force of the range hood spreads the fire, so that the greater property loss is caused.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides the range hood capable of automatically detecting and extinguishing fire. The invention relates to a range hood capable of detecting and extinguishing fire when a gas stove is used for cooking and a fire disaster occurs.

A range hood capable of automatically detecting and extinguishing fire comprises a smoke collecting hood, an air box shell, a screen plate, a filter cover, an impeller and an air duct, wherein the smoke collecting hood is arranged below the air box shell, the impeller is installed in the air box shell, the air duct is arranged above the air box shell, the screen plate and the filter cover are installed in a smoke collecting port of the smoke collecting hood, a smoke exhaust groove is formed in the screen plate, an inert gas storage tank is arranged on the smoke collecting hood and connected with an air inlet of a gas release valve, a gas release valve port of the gas release valve is connected with a gas release ring cavity through a gas release pipe, the gas release ring cavity is arranged inside the smoke collecting hood and outside the screen plate, and a gas injection hole is formed below the gas release ring cavity; the outside in the last gassing ring chamber of collection cigarette cover is equipped with accomodates the groove, accomodate groove internally mounted and have fire prevention curtain, fire prevention curtain's upper end is fixed on collection cigarette cover, fire prevention curtain's below is equipped with the counterweight plate, the below of counterweight plate is equipped with the inflation mortise lock, the counterweight plate is taken the piece through the inflation mortise lock and the locking of accomodating groove export both sides and is locked, one side that the piece was taken in the locking is articulated with collection cigarette cover, fire prevention curtain passes through trigger mechanism and is connected with the bleed valve, when fire prevention curtain pulls down, makes the bleed valve open through trigger mechanism, and inert gas is full of inert gas through bleed valve and gassing ring chamber from the jet orifice blowout, makes the fire extinguish in fire prevention curtain inboard, inert gas can be helium, argon gas etc..

Further, two chamber and two expansion chamber that reset that the inflation mortise lock set up including the symmetry, the expansion chamber separates through the piston with the chamber that resets between, the one end that the piston rod of piston passed the expansion chamber is equipped with the bolt piece, be equipped with the sealing washer on the contact surface of inflation mortise lock and piston rod, the intracavity that resets is equipped with reset spring, and the outside in chamber that resets is equipped with the steady voltage through-hole, the expansion intracavity is full of gas, and the expansion chamber is airtight cavity, and after the ignition, the expansion chamber is heated, and inside gas expansion promotes piston extrusion reset spring, makes the bolt piece shrink, and the piece is taken to the counter weight plate and locking and falls under the effect of gravity, and the counter weight plate drives the fire curtain cover and closes on the gas-cooker, avoids the intensity of a fire to stretch to other places.

Further, the deflation valve comprises a deflation valve core, a deflation valve cavity, a deflation spring, a connecting contact piece, a conductive contact piece, a lead, a contact piece spring, a pulling block and a power-off cavity, the air release valve core and the air release spring are arranged in the air release valve cavity, the air release spring extrudes the air release valve core to enable the air release valve core to be in contact with the sealing surface of the air release valve cavity for sealing, the connecting contact piece, the conductive contact piece, the contact piece spring and the pulling block are arranged in the power-off cavity, the contact piece spring presses the connecting contact piece to make the connecting contact piece contact with the conductive contact piece, the conductive contact is connected with a power supply circuit of the impeller motor through a lead, the trigger mechanism comprises a pull rope and a fixed pulley, the fixed pulley is fixedly arranged on the air release valve, the pull rope bypasses the fixed pulley, and one end of the pull rope is fixedly connected with the fire-proof curtain, the other end of the pull rope penetrates through the power-off cavity and is fixedly connected with the end part of the air release valve core of the air release valve cavity, and the pull block is fixedly arranged on one section of the pull rope, which is positioned in the power-off cavity.

Further, the fire prevention curtain includes fire prevention cloth, many transverse bars and many vertical poles, many transverse bars transversely fixes on the fire prevention cloth, many transverse bars vertically fixes on the fire prevention cloth, is equipped with many vertical poles between two adjacent transverse bars, when the fire prevention curtain is taken in and is accomodate the groove, the fire prevention curtain uses the transverse bars as the crease, and vertical pole and fire prevention cloth between two adjacent transverse bars are the folding layer, adopt above-mentioned setting, make things convenient for the folding of fire prevention cloth to accomodate.

Furthermore, install the fire prevention valve on the wind channel, the fire prevention valve adopts the solenoid valve control, and after the impeller motor outage, the corresponding signal of telecommunication is accepted to the solenoid valve to control fire prevention valve and close.

Furthermore, a chamfer is arranged on the contact surface of the latch block and the locking block, and the latch block can be conveniently inserted into the bottom of the locking block by the chamfer.

Furthermore, the fireproof cloth is made of acrylic fiber fireproof cloth, the acrylic fiber fireproof cloth meets the sanitary standard of a kitchen, and similarly, other materials can be adopted to make the fireproof cloth according to the requirements.

Further, the air injection holes are arranged in two rows, and the same air injection holes can be arranged according to air injection requirements.

Furthermore, an inflation joint is arranged on the outer side of the expansion cavity, and the expansion cavity is inflated through the inflation joint to control the internal pressure, so that the expansion amount of the latch block at different temperatures can be controlled.

In conclusion, the invention has the following beneficial effects: the fire extinguishing device can monitor the fire by adopting the expansion mortise lock structure to replace the traditional smoke sensor or temperature sensor at the initial stage of the fire of the cooking bench, can extinguish the fire of the fire in time after detecting the fire, does not pollute a kitchen in the fire extinguishing process, does not need subsequent excessive cleaning, and has the characteristics of environmental protection and sanitation.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is an enlarged view of a portion of the purge valve of the present invention;

FIG. 4 is a schematic structural view of the expansion latch portion of the present invention;

FIG. 5 is a schematic illustration of the present invention in operation;

fig. 6 is a bottom view of the present invention.

In the figure: 1. a smoke collecting hood; 2. an air box housing; 3. a screen plate; 4. a filter housing; 5. an impeller; 6. an air duct; 7. a fire damper; 8. an inert gas storage tank; 9. a deflation valve; 10. an air discharge ring cavity; 11. a gas injection hole; 12. a receiving groove; 13. a fire curtain; 14. a weight plate; 15. an expansion mortise lock; 16. a smoke collection port; 17. a relief valve core; 18. a gas discharge valve cavity; 19. a deflation spring; 20. an air release valve port; 21. pulling a rope; 22. a fixed pulley; 23. discharging the air pipe; 24. locking the lapping block; 25. a reset chamber; 26. an expansion chamber; 27. a latch block; 28. a return spring; 29. a piston; 30. a voltage stabilization through hole; 31. an inflation joint; 32. a transverse bar; 33. a longitudinal rod; 34. a smoke exhaust groove; 35. connecting a contact piece; 36. a conductive contact; 37. a wire; 38. a contact spring; 39. pulling the block; 40. and a power-off cavity.

Detailed Description

As shown in fig. 1-6, a range hood capable of automatically detecting and extinguishing fire comprises a smoke collecting hood 1, a wind box housing 2, a screen plate 3, a filter cover 4, an impeller 5 and an air duct 6, wherein the smoke collecting hood 1 is arranged below the wind box housing 2, the impeller 5 is arranged in the wind box housing 2, the air duct 6 is arranged above the fan housing 2, the screen plate 3 and the filter cover 4 are arranged in a smoke collecting port 16 of the smoke collecting hood 1, a smoke discharge groove 34 is arranged on the screen plate 3, an inert gas storage tank 8 is arranged on the smoke collecting hood 1, the inert gas storage tank 8 is connected with an air inlet of a vent valve 9, a vent valve port 20 of the vent valve 9 is connected with a vent ring cavity 10 through a vent pipe 23, the vent ring cavity 10 is arranged inside the smoke collecting hood 10 and outside the screen plate 3, and a gas orifice 11 of the vent ring cavity 10 is arranged below the vent ring cavity; the outside of gassing ring chamber 10 is equipped with accomodates groove 12 on collection petticoat pipe 1, accomodate groove 12 internally mounted and have fire prevention curtain 13, the upper end of fire prevention curtain 13 is fixed on collection petticoat pipe 1, the below of fire prevention curtain 13 is equipped with counterweight plate 14, counterweight plate 14's below is equipped with inflation mortise lock 15, counterweight plate 14 is taken piece 24 locking through inflation mortise lock 15 and the locking of accomodating groove 12 export both sides, one side that piece 24 was taken in locking is articulated with collection petticoat pipe 1, fire prevention curtain 13 is connected with bleed valve 9 through trigger mechanism, when fire prevention curtain 13 pulls down, makes bleed valve 9 open through trigger mechanism, and inert gas is followed fumarole 11 through bleed valve 9 and gassing ring chamber 10 and is spouted, is full of inert gas in fire prevention curtain 13 inboard, makes the fire extinguish, inert gas can be helium, argon gas etc..

Further, inflation mortise lock 15 is including two chamber 25 and two expansion chamber 26 that reset that the symmetry set up, expand and separate through piston 29 between chamber 25 and the chamber 25 that resets, the one end that the piston rod of piston 29 passed expansion chamber 26 is equipped with bolt piece 27, be equipped with the sealing washer on the contact surface of inflation mortise lock 15 and piston rod, reset and be equipped with reset spring 28 in the chamber 25, and reset chamber 25's the outside and be equipped with steady voltage through-hole 30, be full of gas in the expansion chamber 26, expansion chamber 26 is airtight cavity, and after lighting a fire, expansion chamber 26 is heated, and inside gas expansion promotes piston 29 extrusion reset spring 28, makes bolt piece 27 shrink, and weight plate 14 and locking take piece 24 whereabouts under the effect of gravity, and weight plate 14 drives fire curtain 13 cover and closes on the gas-cooker, avoids the intensity of a fire to stretch to other places.

Further, the deflation valve 9 comprises a deflation valve core 17, a deflation valve cavity 18, a deflation spring 19, a connection contact 35, a conductive contact 36, a wire 37, a contact spring 38, a pulling block 39 and a power-off cavity 40, the deflation valve core 17 and the deflation spring 19 are installed in the deflation valve cavity 18, the deflation spring 19 presses the deflation valve core 17 to make it contact and seal with the sealing surface of the deflation valve cavity 18, the connection contact 35, the conductive contact 36, the contact spring 38 and the pulling block 39 are installed in the power-off cavity 40, the contact spring 38 presses the connection contact 35 to make it contact with the conductive contact 36, the conductive contact 36 is connected with the power supply circuit of the impeller motor through the wire 37, the trigger mechanism comprises a pulling rope 21 and a fixed pulley 22, the fixed pulley 22 is fixedly arranged on the deflation valve 9, the pulling rope 21 bypasses the fixed pulley 22, and one end of the pulling rope 21 is fixedly connected with the fire curtain 13, the other end of the pulling rope 21 passes through the power-off cavity 40 and is fixedly connected with the end part of the vent valve core 17 of the vent valve cavity 18, and a pulling block 39 is fixedly arranged on one section of the pulling rope 21 positioned in the power-off cavity 40.

Further, fire curtain 13 includes fire prevention cloth, many transverse bar 32 and many vertical poles 33, many transverse bar 32 transversely fixes on fire prevention cloth, many transverse bar 33 vertically fixes on fire prevention cloth, is equipped with many vertical poles 33 between two adjacent transverse bar 32, when fire curtain 13 takes in to accomodate groove 12, fire curtain 13 uses transverse bar 32 as the crease, and vertical pole 33 between two adjacent transverse bar 32 and fire prevention cloth are the folding layer, adopt above-mentioned setting, make things convenient for folding of fire prevention cloth to accomodate.

Further, install fire prevention valve 7 on the wind channel 6, fire prevention valve 7 adopts the solenoid valve control, and after the impeller motor outage, the corresponding signal of telecommunication is accepted to the solenoid valve to control fire prevention valve 7 and close.

Furthermore, a chamfer is arranged on the contact surface of the latch block 27 and the locking block 24, and the latch block 27 can be conveniently inserted into the bottom of the locking block 24 by the chamfer.

Furthermore, the fireproof cloth is made of acrylic fiber fireproof cloth, the acrylic fiber fireproof cloth meets the sanitary standard of a kitchen, and other materials can be used for making the fireproof cloth according to the requirement.

Further, the air injection holes 11 are arranged in two rows, and similarly, the air injection holes can be arranged according to air injection requirements.

Further, an inflation connector 31 is arranged on the outer side of the expansion cavity 26, the expansion cavity 26 is inflated through the inflation connector 31, the internal pressure is controlled, and therefore the expansion amount of the latch block 27 at different temperatures can be controlled, preferably, when the temperature in the expansion cavity 26 is controlled to be 50-60 ℃, the contraction amount of the latch block 27 can reach the falling condition of the fireproof curtain 13, and fire extinguishment at the initial stage of fire can be achieved.

The working principle is as follows: when a fire breaks out in a kitchen cooking bench, the air temperature above the kitchen cooking bench rises, the gas in the expansion cavity of the expansion mortise lock expands, the bolt block is pushed to contract, after the contraction amount reaches a certain amount, the fireproof curtain is under the action of gravity of the counterweight plate and covers on the cooking bench, the fireproof curtain falls down, the exhaust valve core is pulled through the pull rope and the pull block moves, the exhaust valve is opened, the inert gas is released through the air jet hole, the fire is extinguished, the pull block pushes and presses the connecting contact piece, the impeller motor is powered off, the electromagnetic valve of the fireproof valve is controlled to receive corresponding electric signals at the same time, the fireproof valve is controlled to be closed, the fire is prevented from spreading, meanwhile, the gas stove is manually closed in time, the effect of quickly extinguishing the fire is achieved, after the fire is extinguished, the fireproof curtain is folded and stored in the storage groove, the fireproof curtain is locked through the expansion mortise lock (after the temperature is reduced), the exhaust valve is also closed at the same time, and the range hood returns to the initial state.

After reading this description, those skilled in the art may make modifications as required without inventive contribution to the present embodiments, but fall within the scope of the claims of the present invention.

Claims

1. The utility model provides a but lampblack absorber of automated inspection and putting out a fire, includes collection petticoat pipe (1), bellows shell (2), otter board (3), filter mantle (4), impeller (5) and wind channel (6), collection petticoat pipe (1) sets up in bellows shell (2) below, install in bellows shell (2) impeller (5), wind channel (6) set up the top at fan shell (2), install in collection mouth (16) of collection petticoat pipe (1) otter board (3) and filter mantle (4), be equipped with on otter board (3) and arrange smoke groove (34), its characterized in that: the exhaust fume collecting hood is characterized in that an inert gas storage tank (8) is arranged on the exhaust fume collecting hood (1), the inert gas storage tank (8) is connected with an air inlet of a deflation valve (9), a deflation valve port (20) of the deflation valve (9) is connected with a deflation annular cavity (10) through a deflation pipe (23), the deflation annular cavity (10) is arranged inside the exhaust fume collecting hood (10) and outside the screen plate (3), and an air injection hole (11) is arranged below the deflation annular cavity (10); the exhaust hood is characterized in that a containing groove (12) is formed in the outer side of an upper exhaust ring cavity (10) of the exhaust fume collecting hood (1), a fireproof curtain (13) is installed inside the containing groove (12), the upper end of the fireproof curtain (13) is fixed to the exhaust fume collecting hood (1), a counterweight plate (14) is arranged below the fireproof curtain (13), an expansion mortise lock (15) is arranged below the counterweight plate (14), the counterweight plate (14) is locked with locking block pieces (24) on two sides of an outlet of the containing groove (12) through the expansion mortise lock (15), one side of each locking block piece (24) is hinged to the exhaust fume collecting hood (1), the fireproof curtain (13) is connected with an exhaust valve (9) through a trigger mechanism, when the fireproof curtain (13) is pulled down, the exhaust valve (9) is opened through the trigger mechanism, and inert gas is ejected from an exhaust hole (11) through the exhaust valve (9) and the exhaust ring cavity (10); the expansion mortise lock (15) comprises two reset cavities (25) and two expansion cavities (26) which are symmetrically arranged, the expansion cavities (25) are separated from the reset cavities (25) through pistons (29), a bolt block (27) is arranged at one end, penetrating through the expansion cavities (26), of piston rods of the pistons (29), a sealing ring is arranged on the contact surface of the expansion mortise lock (15) and the piston rods, a reset spring (28) is arranged in the reset cavity (25), a pressure stabilizing through hole (30) is arranged on the outer side of the reset cavity (25), and the expansion cavities (26) are filled with gas; the deflation valve (9) comprises a deflation valve core (17), a deflation valve cavity (18), a deflation spring (19), a connecting contact piece (35), a conductive contact piece (36), a lead (37), a contact piece spring (38), a pull block (39) and a power failure cavity (40), the deflation valve core (17) and the deflation spring (19) are installed in the deflation valve cavity (18), the deflation spring (19) presses the deflation valve core (17) to enable the deflation valve core to be in contact sealing with the sealing surface of the deflation valve cavity (18), the connecting contact piece (35), the conductive contact piece (36), the contact piece spring (38) and the pull block (39) are installed in the power failure cavity (40), the contact piece spring (38) presses the connecting contact piece (35) to enable the connecting contact piece to be in contact with the conductive contact piece (36), the conductive contact piece (36) is connected with a power supply circuit of the impeller motor through the lead (37), the trigger mechanism comprises a pulling rope (21) and a fixed pulley (22), the fixed pulley (22) is fixedly arranged on the air release valve (9), the pull rope (21) bypasses the fixed pulley (22), one end of the pull rope (21) is fixedly connected with the fire-proof curtain (13), the other end of the pull rope (21) penetrates through the end part of the air release valve core (17) of the power-off cavity (40) and the air release valve cavity (18), and the pull block (39) is fixedly arranged on one section of the pull rope (21) located on the power-off cavity (40).

2. A range hood capable of automatically detecting and extinguishing fire according to claim 1, wherein: fire curtain (13) are including fire prevention cloth, many transverse bar (32) and many vertical pole (33), many transverse bar (32) transversely fix on fire prevention cloth, many vertical pole (33) vertically fix on fire prevention cloth, are equipped with many vertical pole (33) between two adjacent transverse bar (32), when fire curtain (13) are taken in and are accomodate groove (12), fire curtain (13) use transverse bar (32) as the crease, and vertical pole (33) between two adjacent transverse bar (32) and fire prevention cloth are the folding layer.

3. A range hood according to claim 2, wherein said range hood is capable of automatic detection and fire extinguishing, and wherein: and a fire-proof valve (7) is arranged on the air duct (6), and the fire-proof valve (7) is controlled by an electromagnetic valve.

4. A range hood according to claim 3, wherein said range hood is capable of automatically detecting and extinguishing fire, said range hood further comprising: and a chamfer is arranged on the contact surface of the latch block (27) and the locking block (24).

5. A range hood capable of automatically detecting and extinguishing a fire according to claim 4, wherein: the fireproof cloth is made of acrylic fiber fireproof cloth.

6. A range hood capable of automatically detecting and extinguishing fire according to claim 5, wherein: the air injection holes (11) are arranged in two rows.

7. A range hood capable of automatically detecting and extinguishing a fire according to claim 6, wherein: an inflation joint (31) is arranged on the outer side of the expansion cavity (26).