CN217274366U

CN217274366U - A system that catches fire prevents for range hood

Info

Publication number: CN217274366U
Application number: CN202220520125.7U
Authority: CN
Inventors: 贾翔
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2022-08-23
Anticipated expiration: 2032-03-10

Abstract

The utility model relates to a prevention system of catching fire for range hood, include: the shell is provided with an air inlet duct and an air inlet communicated with the air inlet duct; the air injection pipe is arranged in the air inlet duct, is arranged adjacent to the air inlet and is provided with an air injection hole; and the gas storage device is used for storing inert gas, is communicated with the gas ejector pipe and is used for providing the inert gas for the gas ejector pipe. When fire occurs in the cooking process, inert gas (or non-combustion-supporting gas) can be sprayed into the air inlet duct through the gas spraying pipe, the inert gas sprayed from the gas spraying holes can effectively isolate and dilute combustible oil smoke, open fire is prevented from entering the air inlet duct, and the purpose of preventing fire is achieved.

Description

A system that catches fire prevents for range hood

Technical Field

The utility model relates to a range hood technical field especially relates to a prevention system of catching fire for range hood.

Background

The range hood is a kitchen appliance for purifying the kitchen environment, and particularly sucks and exhausts oil smoke generated in the cooking process out of a kitchen through a fan system. Because Chinese style culinary art is very easy to produce the oil smoke, and when frying, stir-fry etc. operation, the oil smoke temperature is too high, can be ignited by the naked light of pan below and rise to the lampblack absorber intracavity, especially when the culinary art person carries out "top pot" operation in order to make the edible material be heated or flavour evenly, very easily arouse the naked light that rises, these naked lights that rise to the range hood intracavity can ignite the greasy dirt that accumulates in the intracavity, lead to the lampblack absorber intracavity to catch fire, cause the harm to the spare part of lampblack absorber. At present, the modes of water spraying, dry powder spraying and the like are mostly adopted for fire extinguishing in the range hood on fire.

For example, the Chinese utility model patent application with the application number of CN201721428368.3 (No. CN 207569945U) discloses a smoke exhaust ventilator with fire extinguishing and purifying functions, wherein the fire extinguishing device consists of a smoke sensor, an audible and visual alarm device and a dry powder fire extinguisher, and the smoke sensor, the audible and visual alarm device and the dry powder fire extinguisher are triggered by the audible and visual alarm device to spray dry powder to extinguish fire. However, since the dry powder is an inorganic salt fine particle and is directly sprayed inside the range hood, not only can damage internal components of the range hood, but also can pollute the kitchen environment, and the use experience of users is reduced. It can be understood that substances such as water or dry powder are used for extinguishing fire, cleaning and maintenance in the range hood are not facilitated, and the workload of subsequent cleaning is large. On the other hand, the range hood only carries out fire extinguishing operation aiming at the situation after the interior of the range hood is ignited, but can not isolate the fire before the interior of the range hood is ignited, thereby achieving the purpose of better preventing the ignition and reducing the damage to the internal parts of the range hood.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to prior art's current situation, provide one kind and can keep apart the intensity of a fire before the range hood inner chamber catches fire, reach the prevention firing system for range hood of the purpose that the prevention caught fire betterly.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a fire prevention system for a range hood, comprising:

the shell is provided with an air inlet duct and an air inlet communicated with the air inlet duct;

the air injection pipe is arranged in the air inlet duct, is arranged close to the air inlet and is provided with an air injection hole;

and the gas storage device is used for storing inert gas, is communicated with the gas ejector pipe and is used for providing the inert gas for the gas ejector pipe.

Generally speaking, the air feed break-make of gas storage device in to the gas ejector pipe can be realized through manual operation, in order to realize the automated control of inert gas supply to can in time jet gas when open flame enters into range hood's inner chamber, still include:

the temperature sensor is used for detecting the temperature at the air inlet of the shell;

the electromagnetic valve is arranged in a flow path between the gas storage device and the gas ejector pipe and is used for controlling the on-off of the inert gas;

and the controller is in electric signal connection with the temperature sensor and the electromagnetic valve and controls the opening and closing of the electromagnetic valve according to the received temperature signal of the temperature sensor.

In order to enable the temperature sensor to be close to the cooking operation area as much as possible so as to judge whether the cooking process catches fire more accurately, the casing comprises a smoke collecting hood, the air inlet is formed in the bottom of the smoke collecting hood, a rectifying plate opposite to the air inlet is further arranged at the bottom of the smoke collecting hood, and the temperature sensor is arranged on the bottom surface of the rectifying plate.

The temperature sensor can adopt various prior arts such as an infrared sensor and a thermistor sensor, and is a thermistor sensor in order to guarantee the accuracy of temperature detection and improve the service life of the temperature sensor.

For two eyes about the adaptation, further improve temperature detection's accuracy, temperature sensor has two, locates respectively the left and right sides of cowling panel.

In order to facilitate the replacement of the gas storage device or the supplement of the inert gas by a user, the gas storage device is a gas storage bottle arranged outside the casing.

In order to enable inert gas to be more fully sprayed into the air inlet duct through the gas-spraying pipe so as to achieve the purpose of quickly destroying the combustion condition, the gas-spraying pipe is arranged at the air inlet in a bent manner to form a pipe network structure, and the gas-spraying holes are distributed along the length direction of the gas-spraying pipe.

In order to further improve the speed of damaging the combustion condition in the air inlet duct, the pipe network structure formed by the air injection pipe is provided with at least two layers which are arranged at intervals along the flowing direction of the smoke.

In order to install the air injection pipe in the air inlet duct, a support is arranged on the inner wall of the machine shell, and a pipe network structure formed by the air injection pipe is placed on the support.

In order to reasonably set the installation position of the air injection pipe, a fan system is arranged in the machine shell, an oil filter screen covers the air inlet, and a pipe network structure formed by the air injection pipe is located between the fan system and the oil filter screen. Above-mentioned structural design has effectively utilized the clearance space between fan system and the oil cleaner screen in the air inlet duct, and the fire protection screen that sets up in air inlet department can effectively avoid the naked light to enter into fan system position, key parts such as harm fan system's motor.

As an improvement, the pipe network structure formed by the air injection pipes has two layers arranged at intervals along the flowing direction of the flue gas, namely a first pipe network structure adjacent to the air inlet and a second pipe network structure far away from the air inlet, the air injection holes on the air injection pipes of the first pipe network structure face the air inlet, and the air injection holes of the air injection pipes of the second pipe network structure face away from the air inlet. Above-mentioned structural design for the pipe network structure that the gas-jet lance formed both can dilute the flue gas of inside towards air intake position injection inert gas, can spray inert gas towards the inside in air intake duct again, dilutes the oil smoke that will enter into in the air intake duct through the air intake, therefore, has improved the efficiency of keeping apart the intensity of a fire to the at utmost.

Compared with the prior art, the utility model has the advantages that:

1. when fire occurs in the cooking process, inert gas (or non-combustion-supporting gas) can be sprayed into the air inlet duct through the gas spraying pipe, the inert gas sprayed from the gas spraying holes can effectively isolate and dilute combustible oil smoke, open fire is prevented from entering the air inlet duct, and the purpose of preventing fire is achieved; in the preferred scheme, the gas ejector pipe is arranged at the pipe network structure of air intake department, and it not only can in time, fast spray inert gas in air intake department, destroys the burning condition, and pipe network structure itself also can reduce the ignition point, plays the purpose of supplementary fire extinguishing.

2. The prevention system structure that catches fire of range hood is succinct, and convenient installation and the clearance of removing, wherein, the injection pipe is installed near range hood's air intake for the inside key part that catches fire of range hood is protected better to the dry powder type mode in the prevention range hood than prior art, provides range hood's life.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention;

fig. 2 is a schematic perspective view of another angle according to an embodiment of the present invention;

FIG. 3 is a schematic perspective view of the front cover plate of the blower housing of FIG. 1;

fig. 4 is a vertical cross-sectional view of the embodiment of the present invention, cut along the left-right direction;

fig. 5 is a schematic perspective view of the gas lance according to the embodiment of the present invention;

fig. 6 is a schematic perspective view of another angle of the gas lance according to the embodiment of the present invention.

Detailed Description

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

Directional terms such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the present invention, but these terms are used herein for convenience of description only and are determined based on example orientations shown in the drawings. Because the disclosed embodiments may be arranged in different orientations, these directional terms are for illustrative purposes only and should not be construed as limiting, and for example, "upper" and "lower" are not necessarily limited to orientations opposite or consistent with the direction of gravity.

Referring to fig. 1 to 6, a fire prevention system for a range hood includes a housing 10, a gas nozzle 20, a gas storage device 30, a temperature sensor 40, and a controller.

Referring to fig. 1, the cabinet 10 includes a fan frame 11 and a smoke collecting hood 12 provided at a bottom of the fan frame 11. The blower system 14 is arranged in the blower frame 11, the blower system 14 is a centrifugal blower, and the structure and the working principle of the centrifugal blower are the prior art and are not described in detail.

Referring to fig. 4, in the present embodiment, a top-suction type range hood is taken as an example to describe the fire prevention system for the range hood, an air inlet 101 is formed at the bottom of the smoke collecting hood 12, an air inlet duct 100 is formed in an inner space of the fan frame 11, and the air inlet 101 of the smoke collecting hood 12 is opposite to and correspondingly communicated with the air inlet duct 100 of the fan frame 11. The bottom of the fume collecting hood 12 is also provided with a rectifying plate 16 opposite to the air inlet 101, wherein the rectifying plate 16 is adjusted in a lifting way to adapt to different air volume gears.

An oil filter screen 15 is further covered at the air inlet 101 of the smoke collecting hood 12, and is used for filtering the oil smoke.

The gas injection pipe 20 is arranged in the air inlet duct 100 and is arranged adjacent to the air inlet 101, wherein the tail end of the gas injection pipe 20 is closed, and gas injection holes 21a are distributed along the length direction; 21b are provided. Specifically, the air sparge pipes 20 form a pipe network structure located between the fan system 14 and the oil screen 15. By the aid of the structural design, a gap space between the fan system 14 and the oil filter screen 15 in the air inlet duct is effectively utilized, and the fire barrier arranged at the air inlet 101 can effectively prevent open fire from entering the position of the fan system 14 to damage key components of the fan system 14 such as a motor.

Referring to fig. 3 and fig. 5, the gas ejector 20 of the present embodiment is disposed in a curved shape at the air inlet 101 to form a pipe network structure, that is, the gas ejector is disposed in a winding manner at the air inlet 101, and is disposed over the whole air inlet 101, specifically, the pipe network structure formed by the gas ejector 20 has two layers, which are disposed at intervals along the flow direction of the flue gas, the two layers of pipe network structures are a first pipe network structure 20a adjacent to the air inlet 101 (i.e., located at the lower layer) and a second pipe network structure 20b far away from the air inlet 101 (i.e., located at the upper layer), and the gas ejecting holes 21a on the gas ejector 20 of the first pipe network structure 20a are respectively; 21b towards the air inlet 101, and the air injection holes 21a of the air injection pipes 20 of the second pipe network structure 20 b; 21b face away from the intake vent 101. The pipe network structure that jet-propelled pipe 20 formed both can dilute inside flue gas towards air intake 101 position injection inert gas through first pipe network structure 20a, can spray inert gas towards air intake 100's inside through second pipe network structure 20b again, dilutes the oil smoke that will enter into the air intake duct through air intake 101, therefore, has improved the efficiency of keeping apart the intensity of a fire to the at utmost.

Referring again to fig. 4, the inner wall of the casing 10 has a support 13, and the gas lances 20 form a pipe network structure resting on the support 13.

The temperature sensors 40 of the present embodiment are preferably two thermistor sensors, wherein two thermistor sensors are respectively disposed on the left and right sides of the bottom surface of the rectifying plate 16 to match with the left and right eyelets on the cooking bench, so as to further improve the accuracy of temperature detection.

The gas storage device 30 is used for storing inert gas, and the gas storage device 30 is communicated with the gas ejector 20 and used for providing the inert gas to the gas ejector 20. Specifically, the gas storage device 30 of the present embodiment is preferably a gas storage cylinder, so as to facilitate the user to replace the gas storage device 30 or supplement the inert gas.

An electromagnetic valve 31 is arranged at the air outlet of the gas storage bottle, and the electromagnetic valve 31 can be controlled by a controller of the range hood to act so as to control the on-off of the inert gas between the gas storage bottle and the gas injection pipe 20.

In order to automatically release the inert gas when a fire occurs in the cooking process, the controller of the range hood is in electrical signal connection with the temperature sensor 40 and the electromagnetic valve 31, and controls the opening and closing of the electromagnetic valve 31 according to the received temperature signal of the temperature sensor 40. For example, when the thermistor sensor detects that the temperature at the air inlet 101 reaches a set threshold, a temperature signal is transmitted to the controller, the controller controls the electromagnetic valve 31 to open, the inert gas is released into the gas spraying pipe 20, and the temperature is reduced through the pipeline and the gas spraying holes 21 a; 21b to destroy the combustion condition, thereby preventing fire in the range hood.

On the basis of the above embodiments, other embodiments can be obtained by replacing and improving the related technical features. For example, the fire prevention system for a range hood of the embodiment is not only suitable for a top-suction range hood, but also suitable for a side-suction range hood or other existing various range hoods.

Claims

1. A fire prevention system for a range hood, comprising:

the air conditioner comprises a shell (10) and a fan, wherein the shell is provided with an air inlet duct (100) and an air inlet (101) communicated with the air inlet duct (100);

it is characterized by also comprising:

the air injection pipe (20) is arranged in the air inlet duct (100), is arranged close to the air inlet (101), and is provided with air injection holes (21a, 21 b);

the gas storage device (30) is used for storing inert gas, and the gas storage device (30) is communicated with the gas ejector pipe (20) and used for providing the inert gas for the gas ejector pipe (20).

2. The fire prevention system for a range hood according to claim 1, further comprising:

the temperature sensor (40) is used for detecting the temperature at the air inlet (101) of the shell (10);

the electromagnetic valve (31) is arranged in a flow path between the gas storage device (30) and the gas ejector pipe (20) and is used for controlling the on-off of the inert gas;

and the controller is in electric signal connection with the temperature sensor (40) and the electromagnetic valve (31), and controls the opening and closing of the electromagnetic valve (31) according to the received temperature signal of the temperature sensor (40).

3. The fire prevention system for a range hood according to claim 2, wherein: casing (10) are including collection petticoat pipe (12), air intake (101) are located the bottom of collection petticoat pipe (12), the bottom of collection petticoat pipe (12) still be equipped with air intake (101) just right cowling panel (16), temperature sensor (40) are located on the bottom surface of cowling panel (16).

4. The fire prevention system for a range hood according to claim 3, wherein: the temperature sensor (40) is a thermistor sensor.

5. The fire prevention system for a range hood according to claim 3, wherein: the temperature sensors (40) are two and are respectively arranged on the left side and the right side of the rectifying plate (16).

6. The fire prevention system for a range hood according to claim 1, wherein: the gas storage device (30) is a gas storage bottle arranged outside the casing (10).

7. The fire prevention system for a range hood according to any one of claims 1 to 6, wherein: the air injection pipe (20) is arranged at the air inlet (101) in a bent shape to form a pipe network structure, and the air injection holes (21 a; 21b) are distributed along the length direction of the air injection pipe (20).

8. The fire prevention system for a range hood according to claim 7, wherein: the pipe network structure formed by the gas nozzles (20) is provided with at least two layers which are arranged at intervals along the flow direction of the flue gas.

9. The fire prevention system for a range hood according to claim 7, wherein: the inner wall of the shell (10) is provided with a bracket (13), and the pipe network structure formed by the gas nozzles (20) is placed on the bracket (13).

10. The fire prevention system for a range hood according to claim 7, wherein: the air-jet type fan is characterized in that a fan system (14) is arranged in the shell (10), an oil filter screen (15) covers the air inlet (101), and a pipe network structure formed by the air-jet pipe (20) is located between the fan system (14) and the oil filter screen (15).

11. The fire prevention system for a range hood according to claim 8, wherein: the pipe network structure formed by the gas nozzles (20) is provided with two layers which are arranged at intervals along the flowing direction of flue gas, namely a first pipe network structure (20a) close to the air inlet (101) and a second pipe network structure (20b) far away from the air inlet (101), gas nozzles (21a, 21b) on the gas nozzles (20) of the first pipe network structure (20a) face the air inlet (101), and gas nozzles (21a, 21b) of the gas nozzles (20) of the second pipe network structure (20b) face away from the air inlet (101).