CN110681087B

CN110681087B - Fire extinguishing device and range hood with same

Info

Publication number: CN110681087B
Application number: CN201910964536.8A
Authority: CN
Inventors: 翁建松; 吴望晨
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2019-10-11
Filing date: 2019-10-11
Publication date: 2021-01-19
Anticipated expiration: 2039-10-11
Also published as: CN110681087A

Abstract

The invention discloses a fire extinguishing device, which comprises a fire extinguishing blanket and a movement mechanism for driving the fire extinguishing blanket to act, and is characterized in that: the movement mechanism comprises a driving mechanism, a transmission mechanism, a guide rail and an elongated flexible piece, the transmission mechanism comprises a rotating shaft driven by the driving mechanism to rotate and a guide piece capable of moving along the guide rail, the fire blanket comprises a head part and a tail part which are opposite, the fire blanket is wound on the rotating shaft from the tail part and can be unfolded along with the rotation of the rotating shaft, the flexible piece is connected to two ends of the tail part of the fire blanket respectively, one end of the flexible piece is connected with the fire blanket and is wound on the rotating shaft along with the fire blanket in the same direction and can be unfolded, the other end of the flexible piece is connected with the guide piece, the two guide rail is arranged on two sides of the rotating shaft at an angle with the rotating shaft respectively, and the position, close to the rotating.

Description

Fire extinguishing device and range hood with same

Technical Field

The invention relates to an oil fume purification device, in particular to a fire extinguishing device and a range hood applying the fire extinguishing device.

Background

The range hood has become one of the indispensable kitchen household electrical appliances in modern families. The range hood works by utilizing the fluid dynamics principle, sucks and exhausts oil smoke through a centrifugal fan arranged in the range hood, and filters partial grease particles by using a filter screen. The centrifugal fan comprises a volute, an impeller arranged in the volute and a motor driving the impeller to rotate. When the impeller rotates, negative pressure suction is generated in the center of the fan, oil smoke below the range hood is sucked into the fan, accelerated by the fan and then collected and guided by the volute to be discharged out of a room.

The household safety is more and more emphasized, and particularly, in a kitchen for cooking oil and fat material objects by using open fire, the hidden danger of fire is particularly required to be prevented. When the existing range hood has fire around, a user is generally required to actively extinguish the fire or automatically spray fire extinguishing media such as foam and the like. 1) The fire extinguishing mode of the user for actively extinguishing the fire is limited by the operation speed of personnel, the optimal fire extinguishing time is delayed, oil cannot be splashed by water when the oil is on fire at high temperature, the fire is expanded due to the splashing of the water, but a plurality of users do not have the common sense, so that the personnel are easy to operate in a confused state, and the fire extinguisher is accidentally injured to cause serious property and personal injury. 2) The fire extinguishing mode of automatically spraying fire extinguishing media such as foam and the like usually causes great damage to the cleanliness of a kitchen, and a user needs to spend a long time cleaning the kitchen, for example, a front end wet type purification smoke collecting hood capable of automatically extinguishing fire disclosed in the Chinese patent with the application number of 201811304230.1 is used for being installed above a cooking bench and comprises a hood body and a fire extinguishing tank, wherein the hood body is provided with a spraying head, the spraying head is connected with a regulating device, and the outlet of the fire extinguishing tank is communicated with the spraying head through a hose; the temperature sensor is arranged at the lower part of the cover body, the electromagnetic valve is arranged between the outlet of the fire extinguishing tank and the hose, the electromagnetic valve and the temperature sensor are connected with the controller, and the controller is used for receiving the temperature value of the temperature sensor and controlling the opening and closing of the electromagnetic valve. The fire extinguishing device has various hoses, nozzles and the like, and has the advantages of complex structure, large occupied space and high cost; meanwhile, the adopted fire extinguishing mode is wet fire extinguishing, however, in a kitchen environment, the fire on the stove is generally the fire on an oil pan, and if the oil pan is on fire and the fire is extinguished by adopting water, the fire situation is usually expanded, and greater harm is caused; meanwhile, liquid generated by wet fire extinguishing can damage other electric appliances in the kitchen, and the damage to the whole kitchen is large.

For this reason, there have also been extractor hoods using physical fire extinguishing devices. The automatic fire extinguishing device comprises a cover blanket containing box, a cover blanket fire extinguishing arm and a cover type fire extinguishing blanket, wherein the cover blanket containing box is of a flat box structure and is installed above a cooking bench, a receiving and releasing box opening is formed in the outer side of the cover blanket containing box, the cover blanket fire extinguishing arm comprises a left opening arm rod and a right opening arm rod and is installed on the left side and the right side of the receiving and releasing box opening respectively, the left opening arm rod and the right opening arm rod are provided with transmission box covers, a cover bottom clamping opening and a cover top clamping opening, the cover type fire extinguishing blanket is a cover body made of the fire extinguishing blanket and is contained in the cover blanket containing box in a normal state, once a fire situation occurs on the cooking bench, the cover type fire extinguishing arm can immediately cover the cover type fire extinguishing blanket on the periphery of an object on fire, fire can be extinguished in time, and kitchen workers can be protected from being injured by high temperature.

The fire extinguishing device has large structure size, large occupied space, high installation difficulty and high cost; meanwhile, the wall body is damaged, and the appearance is influenced; after the fire extinguishing function is used, the recovery is difficult, and the kitchen environment is damaged to a certain extent.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide a fire extinguishing apparatus, which has small space occupation and low cost, and is convenient for recovery after fire extinguishing.

The second technical problem to be solved by the invention is to provide a range hood with the fire extinguishing device, which has a fire extinguishing function and can improve the smoke absorbing effect.

The technical scheme adopted by the invention for solving the first technical problem is as follows: a fire extinguishing apparatus comprises a fire blanket and a movement mechanism for driving the fire blanket to act, and is characterized in that: the movement mechanism comprises a driving mechanism, a transmission mechanism, a guide rail and an elongated flexible piece, the transmission mechanism comprises a rotating shaft driven by the driving mechanism to rotate and a guide piece capable of moving along the guide rail, the fire blanket comprises a head part and a tail part which are opposite, the fire blanket is wound on the rotating shaft from the tail part and can be unfolded along with the rotation of the rotating shaft, the flexible piece is connected to two ends of the tail part of the fire blanket respectively, one end of the flexible piece is connected with the fire blanket and is wound on the rotating shaft along with the fire blanket in the same direction and can be unfolded, the other end of the flexible piece is connected with the guide piece, the two guide rail is arranged on two sides of the rotating shaft at an angle with the rotating shaft respectively, and the position, close to the rotating.

Preferably, in order to facilitate driving the rotating shaft to rotate, the driving mechanism is a motor, and the transmission mechanism further includes a first gear disposed on the output shaft of the driving mechanism, and a second gear engaged with the first gear, the second gear being disposed on one of the ends of the rotating shaft, so that the driving mechanism can drive the rotating shaft to rotate.

In order to avoid the guide part from being separated from the track groove, a track groove is formed on each guide rail, stop parts extending in opposite directions are arranged on two sides of the opening of the track groove, and the distance between the two stop parts is smaller than the width of the track groove and the size of the guide part.

In order to reduce the friction force, the guide piece is a steel ball with a smooth surface.

In order to ensure that the fire blanket is unfolded and avoid the fire blanket from floating when descending, a counterweight is attached to the head of the fire blanket.

In order to automatically control the fire extinguishing device, a temperature sensor for detecting the temperature and controlling the driving mechanism is further included.

The technical scheme adopted by the invention for solving the second technical problem is as follows: the utility model provides an be applied as above extinguishing device's range hood, includes the collection petticoat pipe, the collection petticoat pipe includes inner cover and sets up the roof at inner cover top, form the collection smoke chamber of upwards sunken, its characterized in that in the middle of the inner cover: the driving mechanism and the transmission mechanism are arranged on the front side of the inner cover, the rotating shaft transversely extends left and right, the guide rail penetrates out of the inner cover to the lower portion of the inner cover and extends backwards, and the fire blanket can penetrate out of the lower portion of the inner cover when being unfolded.

The rotating shaft is arranged on the inner cover in a convenient rotating mode, supporting frames are arranged on the inner cover and located at two ends of the rotating shaft respectively, the top ends of the supporting frames are sunken downwards to form supporting grooves, and the end portions of the rotating shaft are supported in the supporting grooves.

In order to facilitate the guide piece by the inner cover top move to the inner cover below, the guide rail includes first track and second track, and two second tracks set up respectively in the left side bottom and the right side bottom of collection petticoat pipe, first track upwards extends the inner cover and gets into the inner cover top by orbital front end of second, offer by preceding sunken first track groove backward on the first track, offer by sunken second track groove of bottom to top on the second track, first track groove and second track groove intercommunication track groove as an organic whole, second track groove is extended by preceding downward sloping gradually backward.

In order to facilitate the actions of the fire blanket and the flexible part, a first through hole is formed in the corresponding position of the inner cover and the fire blanket, a second through hole is formed in the position, corresponding to the position between the end part of the rotating shaft and the first rail, on the inner cover, and the second through hole is communicated with the first rail groove.

Compared with the prior art, the invention has the advantages that: by arranging the rotating shaft, the flexible part and the guide rail, the fire blanket can completely cover the stove when descending, the fire extinguishing effect is good, the structure is simple, the cost is low, and the fire blanket can be used again; the fire extinguishing device is arranged in the range hood, the occupied space is small, the range hood is suitable for firing an oil pan, after the fire extinguishing function is used, the range hood is easy to recover, the kitchen environment cannot be damaged, the guide rail is arranged on the lower side of the smoke collecting cover, the depth of the smoke collecting cover cavity can be prolonged, and the range hood effect is improved.

Drawings

FIG. 1 is a schematic view of the installation of the range hood and the cooking bench when the fire extinguishing apparatus of the embodiment of the present invention is folded;

FIG. 2 is a schematic view of a range hood according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a range hood in accordance with an embodiment of the present invention;

FIG. 4 is a schematic view of a portion of a range hood according to an embodiment of the present invention;

FIG. 5 is an enlarged view of a portion I of FIG. 4;

FIG. 6 is a schematic view of a fire extinguishing apparatus of a range hood according to an embodiment of the present invention in a folded state;

FIG. 7 is a cross-sectional view of the track of the fire extinguishing apparatus of the range hood according to the embodiment of the present invention;

FIG. 8 is a schematic view of a portion of a smoke collection hood of a range hood according to an embodiment of the present invention;

FIG. 9 is a schematic view of the installation of the range hood of the embodiment of the present invention with the cooking bench when the fire extinguishing apparatus is opened;

fig. 10 is a schematic view showing a deployed state of a fire extinguishing apparatus according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Referring to fig. 2 to 4, a range hood comprises a smoke collecting hood 1 and a fire extinguishing device 2 arranged in the smoke collecting hood 1, wherein a fan frame 3 is arranged above the smoke collecting hood 1 and is used for arranging a fan 4 therein.

The fire extinguishing apparatus 2 comprises a fire blanket 21, a movement mechanism for driving the fire blanket 21 to act, and a temperature sensor 23 for detecting temperature and thereby controlling the movement mechanism. The smoke collecting cover 1 comprises an inner cover 11 and a top plate 12 arranged at the top of the inner cover 11, a smoke collecting cavity 13 which is sunken upwards is formed in the middle of the inner cover 11, a temperature sensor 23 is arranged on the inner cover 11, the part of the temperature sensor is positioned in the space between the inner cover 11 and the top plate 12, and a probe part extends out of the inner cover 11 and is positioned in the smoke collecting cavity 13, so that the temperature of airflow in the smoke collecting cavity 13 is detected.

Referring to fig. 4 to 6, the moving mechanism is disposed between the inner cover 11 and the top plate 12, and includes a driving mechanism 221, a transmission mechanism, a guide rail 223, and an elongated flexible member 224. In this embodiment, the driving mechanism 221 is a motor, and is fixed on the inner cover 11 through the mounting bracket 2211, and a main controller of the range hood can receive a signal from the temperature sensor 23 to control the operation of the driving mechanism 221. The driving mechanism 221 and the transmission mechanism are both disposed on the front side of the inner cover 11, and are disposed so as to cover the front side of the cooker 100 when the fire blanket moves downward, completely isolating the user from the fire source, see fig. 9.

The transmission mechanism includes a first gear 2221 provided on an output shaft of the drive mechanism 221, a second gear 2222 meshed with the first gear 2221, and a rotation shaft 2223, the second gear 2222 being provided on one of end portions of the rotation shaft 2223. The rotation shaft 2223 extends laterally in the left-right direction, and preferably, the rotation shaft 2223 is horizontal. The inner housing 11 has support frames 2224 at both ends of the rotating shaft 2223, respectively, the top ends of the support frames 2224 are depressed downward to form support grooves 2225, and the ends of the rotating shaft 2223 are supported in the support grooves 2225, thereby being rotatable with respect to the smoke collecting hood 1. The transmission mechanism further includes a guide 2226 that can slide or roll along the guide rail 223.

The fire blanket 21 is wound around the rotating shaft 2223. the fire blanket 21 is rectangular and, in conjunction with fig. 10, includes opposite head 211 and tail 212. the head 211 of the fire blanket 21 is attached with a counterweight 213 to ensure that the fire blanket 21 is not prone to fluttering during descent. The fire blanket 21 is wound around the rotating shaft 2223 from the tail portion 212, and the fire blanket 21 is separated from the rotating shaft 2223 without being fixed, so that the fire blanket 21 can be unfolded as the rotating shaft 2223 rotates. The flexible members 224 are connected to the left and right ends of the tail portion 212 of the fire blanket 21. In this embodiment, flexible member 224 is a rope, and one end of flexible member 224 is connected to fire blanket 21 and the other end is connected to guide 2226. The inner cover 11 is provided with a first through hole 111 at a position corresponding to the fire blanket 21, and the length (the dimension in the left-right direction) of the first through hole is adapted to the length of the fire blanket 21, see fig. 8. Thus, when the fire blanket 21 is deployed from the rotating shaft 2223, the head 211 first protrudes downward below the smoke collecting hood 1 through the first through hole 111 to descend by the self-weight and the weight 213.

The guide rails 223 have two, each guide rail 223 for cooperating with a corresponding guide 2226, and includes a first rail 2231 and a second rail 2232, and the two second rails 2232 are respectively disposed at the left and right bottom portions of the smoke collecting hood 1. The first rail 2231 extends upward from the front end of the second rail 2232 through the inner cover 11 into above the inner cover 11. Referring to fig. 7, a first track 22311 recessed from front to back is formed on the first track 2231, a second track 22321 recessed from bottom to top is formed on the second track 2232, the first track 22311 and the second track 22321 are connected to form an integral track groove, and two sides of an opening of the track groove are provided with a stopper 22312 extending in opposite directions, a distance between the two stoppers 22312 is smaller than a width of the track groove and a size of the guide 2226, so that an object moving in the track groove is prevented from falling out of the track groove.

In this embodiment, to reduce friction and facilitate the motion of guide 2226, guide 2226 is a steel ball and the surface light source, which can roll along the track groove, the distance between two stops 22312 is greater than the diameter of the steel ball, ensuring that guide 2226 rolls along the track groove without falling out of the track groove. To accelerate the rolling of the guide 2226 toward the rear side of the hood 1, the second rail groove 22321 is extended from the front to the rear with gradually inclining downward.

The flexible member 224 is also wound around the rotating shaft 2223 in the initial state, and the direction of the rotation is the same as that of the fire blanket 21, and the number of the winding is smaller than that of the fire blanket 21. Referring to fig. 8, the inner housing 11 is opened with a second through hole 112 at a position corresponding to between the end of the rotating shaft 2223 and the first rail 2231, so that the flexible member 223 passes downward through the smoke collecting hood 1. Second through-hole 112 communicates with first track slot 22311 so that flexible member 224 can act with guide 2226 when deployed.

Initially, fire blanket 21 and flexible member 224 are both wound around rotating shaft 2223, and fire blanket 21 is received within smoke collection hood 1, see fig. 1, while guide 2226 is positioned within first track slot 22311 due to the tension in flexible member 224. When the temperature detected by the temperature sensor 23 exceeds a preset temperature, which indicates that a fire may occur, the main controller of the range hood receives a signal from the temperature sensor 23 and then controls the driving mechanism 221 to be turned on, so as to drive the rotating shaft 2223 to rotate, the fire blanket 21 and the flexible member 224 start to be released from the rotating shaft 2223, when the release of the fire blanket 21 is completed, the flexible member 224 can be released at the same time, the guide member 2226, due to the loss of the tensile force of the flexible member 224, can roll downward along the first track groove 22311 and roll backward along the second track groove 22321 due to the inclined design of the second track groove 22321, and in this process, the flexible member 224 can pass through the second through hole 112 and pass through the lower portion of the inner cover 11 to act along with the guide member 2226; meanwhile, the head part of the fire blanket 21 passes through the first through hole 111 of the inner hood 11 and penetrates out to the lower part of the smoke collecting hood 1, the tail part 212 of the fire blanket 21 is brought to the rear side of the smoke collecting hood 1 by the guide part 2226, and the head part 211 of the fire blanket 21 completely covers the kitchen range 100 below the range hood, see fig. 9 and 10.

Claims

1. A fire extinguishing apparatus comprising a fire blanket (21) and a movement mechanism for driving the fire blanket (21) to act, characterized in that: the moving mechanism comprises a driving mechanism (221), a transmission mechanism, a guide rail (223) and an elongated flexible part (224), the transmission mechanism comprises a rotating shaft (2223) driven by the driving mechanism (221) to rotate and a guide part (2226) capable of moving along the guide rail (223), the fire blanket (21) comprises a head part (211) and a tail part (212) which are opposite, the fire blanket (21) is wound on the rotating shaft (2223) from the tail part (212) and can be unfolded along with the rotation of the rotating shaft (2223), the flexible part (224) is respectively connected to two ends of the tail part (212) of the fire blanket (21), one end of the flexible part (224) is connected with the fire blanket (21) and can be wound on the rotating shaft (2223) along the same direction of the fire blanket (21) and can be unfolded, the other end is connected with the guide part (2226), the guide rail (223) has two parts which are respectively arranged on two sides of the rotating shaft (2223) at an angle with the rotating shaft (2223, the guide rail (223) is higher near the rotating shaft (2223) than far from the rotating shaft (2223); when the fire extinguishing device is in an initial state, the fire blanket (21) and the flexible piece (224) are wound on the rotating shaft (2223), and the flexible piece (224) tensions the guide piece (2226); when the fire extinguishing device is unfolded, the rotating shaft (2223) rotates to release the fire blanket (21) and the flexible part (224) from the rotating shaft (2223), the head part (211) of the fire blanket (21) faces downwards, the guide part (2226) loses the pulling force of the flexible part (224) and rolls along the guide rail (223) from a position close to the rotating shaft (2223) to a direction far away from the rotating shaft (2223), and in the process, the flexible part (224) and the tail part (212) of the fire blanket (21) act along the guide part (2226).

2. The fire suppression apparatus of claim 1, wherein: the driving mechanism (221) is a motor, the transmission mechanism further comprises a first gear (2221) arranged on an output shaft of the driving mechanism (221), and a second gear (2222) meshed with the first gear (2221), and the second gear (2222) is arranged on one end of the rotating shaft (2223), so that the driving mechanism (221) can drive the rotating shaft (2223) to rotate.

3. The fire suppression apparatus of claim 1, wherein: a track groove is formed in each guide rail (223), stop pieces (22312) extending oppositely are arranged on two sides of the opening of the track groove, and the distance between the two stop pieces (22312) is smaller than the width of the track groove and the size of the guide piece (2226).

4. The fire suppression apparatus of claim 1, wherein: the guide part (2226) is a steel ball with a smooth surface.

5. The fire suppression apparatus of claim 1, wherein: a counterweight (213) is attached to the head (211) of the fire blanket (21).

6. The fire extinguishing apparatus according to any one of claims 1 to 5, wherein: a temperature sensor (23) for detecting temperature to control the drive mechanism (221) is also included.

7. A range hood applying the fire extinguishing apparatus according to any one of claims 1 to 6, comprising a smoke collecting hood (1), wherein the smoke collecting hood (1) comprises an inner hood (11) and a top plate (12) arranged on the top of the inner hood (11), an upward-concave smoke collecting cavity (13) is formed in the middle of the inner hood (11), and the range hood is characterized in that: the fire blanket is characterized in that the driving mechanism (221) and the transmission mechanism are arranged on the front side of the inner cover (11), the rotating shaft (2223) transversely extends left and right, the guide rail (223) penetrates out of the inner cover (11) to the lower side of the inner cover (11) and extends backwards, and the fire blanket (21) can penetrate out of the lower side of the inner cover (11) when being unfolded.

8. The range hood of claim 7, wherein: support frames (2224) are respectively arranged on the inner cover (11) and at two ends of the rotating shaft (2223), the top ends of the support frames (2224) are downwards sunken to form support grooves (2225), and the end parts of the rotating shaft (2223) are supported in the support grooves (2225).

9. The range hood of claim 7, wherein: the guide rail (223) comprises a first rail (2231) and a second rail (2232), the two second rails (2232) are respectively arranged at the bottom of the left side and the bottom of the right side of the smoke collecting hood (1), the first rail (2231) extends upwards through the inner cover (11) from the front end of the second rail (2232) to enter the upper part of the inner cover (11), a first rail groove (22311) recessed from the front to the rear is formed in the first rail (2231), a second rail groove (22321) recessed from the bottom to the top is formed in the second rail (2232), the first rail groove (22311) and the second rail groove (22321) are communicated to form an integral rail groove, and the second rail groove (22321) gradually extends from the front to the rear.

10. The range hood of claim 9, wherein: first through-hole (111) have been seted up with the relevant position of fire blanket (21) in inner cover (11), on inner cover (11), correspond the position between rotation axis (2223) tip and first track (2231) and seted up second through-hole (112), second through-hole (112) and first track groove (22311) intercommunication.