阅读说明：本技术 一种基于r744冷媒的降温灭火抽油烟机 (Cooling and fire extinguishing range hood based on R744 refrigerant ) 是由 不公告发明人 于 2020-06-15 设计创作，主要内容包括：本发明公开一种基于R744冷媒的降温灭火抽油烟机,包括位姿调整机构、壳体、电控节流阀、冷凝器、压缩机、波纹管、管网、喷雾头、第一风扇、第二风扇,位姿调整机构具有六个自由度,并能监控灶台的热成像情况,壳体为多层半球形结构,其内部安装有管网、第一风扇、下电机、上电机、第二风扇,管网内部充满的R744冷媒介质用于对高温油烟的冷却和扑灭灶台的失火源,下电机驱动第一风扇的旋转,上电机驱动第二风扇旋转,波纹管具有伸缩作用,能使壳体内部与楼体内的烟道连通,压缩机用于压缩R744冷媒气体,冷凝器用于降低R744冷媒气体的温度,使其由高压气态变为高压液态,电控节流阀用于调控高压液态R744冷媒流入管网的速度。(The invention discloses a cooling and fire extinguishing range hood based on an R744 refrigerant, which comprises a pose adjusting mechanism, a shell, an electric control throttle valve, a condenser, a compressor, a corrugated pipe, a pipe network, a spray head, a first fan and a second fan, wherein the pose adjusting mechanism has six degrees of freedom and can monitor the thermal imaging condition of a cooking bench, the shell is of a multilayer hemispherical structure, the pipe network, the first fan, a lower motor, an upper motor and the second fan are arranged in the shell, an R744 refrigerant medium filled in the pipe network is used for cooling high-temperature lampblack and extinguishing a fire source of the cooking bench, the lower motor drives the first fan to rotate, the upper motor drives the second fan to rotate, the corrugated pipe has a telescopic effect and can enable the interior of the shell to be communicated with a flue in a building, the compressor is used for compressing R744 refrigerant gas, the condenser is used for reducing the temperature of the R744 refrigerant gas to enable the temperature of the R744, the electric control throttle valve is used for regulating and controlling the speed of the high-pressure liquid R744 refrigerant flowing into the pipe network.)

1. The utility model provides a cooling smoke ventilator of putting out a fire based on R744 refrigerant, includes position appearance guiding mechanism (1), casing (2), first pipe (3.1), second pipe (3.2), third pipe (3.3), fourth pipe (3.4), automatically controlled choke valve (4), condenser (5), compressor (6), bellows (7), pipe network (8), atomising head (9), first fan (10), lower motor (11), go up motor (12), its characterized in that of second fan (13): the pose adjusting mechanism (1) has six degrees of freedom and can monitor the thermal imaging condition of a cooking bench, the shell (2) is of a multilayer hemispherical structure, a pipe network (8), a first fan (10), a lower motor (11), an upper motor (12) and a second fan (13) are installed in the shell, R744 refrigerant medium filled in the pipe network (8) is used for cooling high-temperature oil smoke and extinguishing a fire source of the cooking bench, the lower motor (11) drives the first fan (10) to rotate to realize the suction effect on the oil smoke, the upper motor (12) drives the second fan (13) to rotate to supplement the first fan (10) and suck the oil smoke, the corrugated pipe (7) has the telescopic effect and can enable the interior of the shell (2) to be communicated with a flue in the building body, so that the cooled oil smoke is discharged to the outside through the flue, and the compressor (6) is used for compressing R744 gas, the condenser (5) is used for reducing the temperature of the R744 refrigerant gas to enable the temperature to be changed from a high-pressure gas state to a high-pressure liquid state, and the electronic control throttle valve (4) is used for regulating and controlling the speed of the high-pressure liquid R744 refrigerant flowing into the pipe network (8).

2. A cooling fire-extinguishing range hood based on an R744 refrigerant as claimed in claim 1, characterized in that: the pose adjusting mechanism (1) comprises a static platform (1.1), six electric cylinders (1.2), a thermal imager (1.3) and a movable platform (1.4), wherein the rear ends of the six electric cylinders (1.2) and the static platform (1.1) form a ball pair, the front ends of the six electric cylinders (1.2) and the movable platform (1.4) form a ball pair, the static platform (1.1), the movable platform (1.4) and the six electric cylinders (1.2) form a Stewart mechanism with six degrees of freedom, the lower end of the static platform (1.1) is provided with the thermal imager (1.3) capable of dynamically monitoring the distribution and the change of a heat source on a cooking bench, the static platform (1.1) is fixedly installed on a wall surface, the movable platform (1.4) is fixedly connected with the shell (2), the shell (2) has six-way degrees of freedom, the shell (2) is hemispherical, the shell (2) is of a three-layer structure, the inner shell (2.3), the middle shell (2) and the outer shell (2) are sequentially provided with an air inlet groove (2), the center of the fan is provided with a hemispherical cavity structure protruding downwards, the middle shell (2.2) is of a round hole net structure, the lower motor (11) is of a hollow shaft motor, namely the center of an output shaft of the lower motor is of a hollow structure, the lower motor (11) is tightly mounted at the upper end of the middle shell (2.2), the first fan (10) is mounted between the inner shell (2.3) and the middle shell (2.2), the center of the first fan (10) is tightly connected with the output shaft of the lower motor (11), six fan blades of the first fan (10) are of a spherical arc blade structure and can smoothly rotate between the inner shell (2.3) and the middle shell (2.2), oil smoke is pumped to pass through a strip-shaped air inlet groove on the inner shell (2.3) and the round hole net structure of the middle shell (2.2) to enter a cavity between the middle shell (2.2) and the outer shell (2.1), the second fan (13) is mounted in the hemispherical cavity protruding downwards of the inner shell (2.3), the upper motor (12) is tightly mounted at, an output shaft of the upper motor (12) penetrates through a hollow shaft of the lower motor (11) to be fixedly connected with the center of the second fan (13), the lower end of the corrugated pipe (7) is communicated with the upper end of the shell (2.1), and the upper end of the corrugated pipe (7) is communicated with a flue in a building.

3. A cooling fire-extinguishing range hood based on an R744 refrigerant as claimed in claim 1, characterized in that: the pipe network (8) comprises a lower ring bin (8.1), an upper ring bin (8.2), a cooling pipe (8.3), an inlet pipe (8.4), a middle ring bin (8.5) and an outlet pipe (8.6), the pipe network (8) is of a hemispherical cage-shaped structure and is arranged in a cavity between the middle shell (2.2) and the shell (2.1), the upper ring bin (8.2) and the lower ring bin (8.1) are arranged on the outer side of the upper end of the shell (2.1), the plurality of cooling pipes (8.3) are uniformly distributed in the circumferential direction, six inlet pipes (8.4) are uniformly distributed in the circumferential direction, the upper end of each inlet pipe (8.4) is communicated with the lower ring bin (8.1), the lower ends of the inlet pipes are communicated with the lower ends of all the cooling pipes (8.3), the lower ends of the six inlet pipes (8.4) are also communicated with six atomizing nozzles (9), a normally closed electromagnetic valve is arranged inside each atomizing nozzle (9), the upper ends of all the cooling pipes (8.3) are communicated with the middle ring bin (8.5), and the six outlet pipes (8.6) are communicated with the middle ring bin (8.5) and the upper ring bin (8..

4. A cooling fire-extinguishing range hood based on an R744 refrigerant as claimed in claim 1, characterized in that: the condenser (5) is arranged at the good outdoor ventilation, a left bin (5.1) and a right bin (5.2) are arranged at the lower end of the condenser, the right bin (5.2) is communicated with the inlet end of the electric control throttle valve (4) through a third pipe (3.3), the outlet end of the electric control throttle valve (4) is communicated with a lower ring bin (8.1) through a first pipe (3.1), the left bin (5.1) is communicated with the outlet end of the compressor (6) through a fourth pipe (3.4), the inlet end of the compressor (6) is communicated with an upper ring bin (8.2) through a second pipe (3.2), a transverse pipe (5.4) is arranged at the upper end of the condenser (5), the left bin (5.1) is communicated with the transverse pipe (5.4) through five metal pipes, the right bin (5.2) is communicated with the transverse pipe (5.4) through five metal pipes, a plurality of layers of cooling mediums for condensing R are arranged between the left bin (5.1) and the right bin (5.2), and a plurality of cooling mediums for accelerating the flow of cooling fins (3.3), and a closed inner cavity formed by the pipe network (8), the first pipe (3.1), the second pipe (3.2), the third pipe (3.3), the fourth pipe (3.4), the compressor (6), the electric control throttle valve (4) and the condenser (5) is filled with an R744 refrigerant.

5. A cooling fire-extinguishing range hood based on an R744 refrigerant as claimed in claim 1, characterized in that: the second fan (13) can make up the problem of insufficient suction force at the center of the first fan (10), and the first fan (10) and the second fan (13) can be used in combination to achieve a better suction effect on oil smoke;

and (3) cooling the high-temperature oil smoke: the compressor (6) compresses the low-pressure gas R744 refrigerant in the pipe network (8) into high-pressure gas through the second pipe (3.2), and transmits the high-pressure gas R744 refrigerant to the left bin (5.1) of the condenser (5) through the fourth pipe (3.4), the high-pressure gas R744 refrigerant is changed into the high-pressure liquid R744 refrigerant in the process that the left bin (5.1) circulates to the right bin (5.2) through the transverse pipe (5.4), the high-pressure gas R744 refrigerant is cooled by the radiating fins and the radiating fan (5.3), and the high-temperature oil smoke and the low-pressure liquid R744 refrigerant in the cooling pipe (8.3) perform sufficient heat exchange under the pumping action of the first fan (10) and the second fan (13), the high-temperature oil smoke is changed into low-temperature oil smoke and is discharged to a building through the corrugated pipe (7) and the flue, the low-pressure liquid R744 refrigerant is changed into the low-pressure gas R744 refrigerant, then the gas is compressed into high-pressure gas by a compressor (6) and enters the next cooling cycle;

fire extinguishing process for fire on cooking bench: the thermal imager (1.3) can dynamically monitor the distribution and the change of a heat source on the cooking bench, if an unknown fire source appears suddenly at a certain position on the cooking bench, the position and posture adjusting mechanism (1) rapidly adjusts the shell (2) to the position above the unknown fire source, the electric control throttle valve (4) is rapidly opened, after a high-pressure liquid R744 refrigerant in the right bin (5.2) rapidly enters the pipe network (8), normally closed electromagnetic valves in the six atomizing heads (9) are opened, the high-pressure liquid R744 refrigerant is sprayed to the unknown fire source in a mist form, the liquid carbon dioxide can absorb a large amount of heat energy by vaporization due to the fact that the component of the R744 refrigerant is carbon dioxide, the temperature of the fire source is rapidly reduced, the carbon dioxide can isolate contact of combustible substances and oxygen, and accordingly the technical effect of fire extinguishing after the cooking bench catches fire is achieved.

Technical Field

The invention relates to the technical field of smoke exhaust ventilators, in particular to a cooling and fire extinguishing smoke exhaust ventilator based on an R744 refrigerant.

Background

The cooking oil fume is formed by a series of physical and chemical changes of edible oil and food under the condition of high temperature, a small amount of oil fume is generated when the edible oil is heated to 170 ℃, the decomposition speed of the oil is accelerated along with the temperature rise, and a large amount of cooking oil fume is generated when the temperature reaches 250 ℃. In the diet mode of China, most foods need to be fried, cooked, fried and other processing processes at high temperature, the phenomenon of 'fire catching in a top pot' can occur even in the cooking process, the oil temperature is usually more than 250 ℃, and a large amount of cooking oil smoke is easily generated.

Because of the limitation of the structural design of the building, the oil smoke generated by kitchens of buildings such as large hotels, guesthouses, dining halls, high-rise residential buildings and the like can not be directly exhausted outdoors, but a flue is intensively arranged in the building body, and the oil smoke generated in the cooking process is exhausted outdoors from the kitchens through the flue; after high-temperature oil smoke encounters a flue side wall with relatively low temperature, the oil smoke is cooled to become oil sludge and is attached to the flue side wall, a large amount of oil sludge is accumulated in the flue in a daily period, a flue fire disaster is easy to generate, and the flue fire disaster has the following characteristics: (1) the fire disaster is hidden at the beginning and is not easy to be found in time, the fire disaster of a common flue is caused by overhigh temperature of the flue, an operator generally pays attention to the cleaning of combustible materials around a cooking bench and easily ignores the potential fire hazard of the flue, because the flue is a relatively limited space, high-temperature oil smoke is sucked into the flue to ignite oil sludge and then is difficult to be found in time, and when the fire disaster is found, open fire is filled in the whole flue, and the best time for putting out a fire is missed; (2) the fire extinguishing device has the advantages that multiple fire disasters are easily caused, the fire extinguishing difficulty is high, the flue is a through long and narrow space, the fire behavior can be caused to rapidly spread by utilizing the chimney effect, the fire is wrapped in the flue after the fire is caught, the fire source outside the flue is easily extinguished when the fire is caught, due to the limitation of a building wall structure, the fire extinguishing agents such as dry powder, water and the like are difficult to touch the fire source inside the flue, the open fire in the flue can rapidly spread, the open fire can easily ignite an indoor range hood through a flue connector in the long and narrow flue, the indoor fire is caught, and the three-dimensional fire is caused, so that the fire behavior is further expanded, and more serious property loss and casualties are caused.

The component of the R744 refrigerant is carbon dioxide, which has the advantages of excellent thermal property, no ozone layer damage, easy acquisition, low cost, no toxicity, no decomposition of irritant substances, no flammability, no explosion and the like, and is not only a refrigerant with excellent performance, but also an excellent fire extinguishing agent.

Chinese patent application No. CN201510840587.1 discloses a range hood with a fire extinguishing device, wherein a spraying device is installed on a range hood, and the range hood can automatically spray around the range hood and when a fire occurs in the range hood itself to achieve the effect of fire extinguishing, i.e. water mist is sprayed only when an open fire occurs to achieve the effect of fire extinguishing, the technical purpose is not to reduce the temperature of oil fume, the temperature of oil fume cannot be reduced in the cooking process, and the occurrence of a flue fire situation cannot be prevented, and the range hood is fixedly installed on a wall, and the spray head of the range hood can only spray water mist in a fixed direction, and the spray direction cannot be adjusted according to the position of a fire source, so the fire extinguishing effect is not ideal; the utility model discloses a chinese utility model patent that application number is CN00209613.7 discloses a extinguishing device of range hood, extinguishing device is equipped with fixed spray tube and handheld hose, can effectively put out a fire to the ignition point of range hood below position, but the oil smoke temperature when still can not reducing the culinary art equally, also can not prevent the emergence of the flue condition of catching fire.

Once a flue is on fire, dense smoke can roll, the fire can quickly spread and expand to the whole building, life and property safety is threatened, and panic is easily caused to surrounding areas, so that normal social order and stability are affected, and therefore, the range hood capable of reducing the smoke temperature, automatically detecting the fire position of a cooking bench and spraying a carbon dioxide fire extinguishing agent to a fire source for extinguishing fire is urgently needed.

Disclosure of Invention

The invention aims to provide a cooling and fire extinguishing range hood based on an R744 refrigerant, which is novel in structure and high in intelligence degree, can effectively reduce the oil smoke temperature and extinguish fire on a cooking bench, and adopts coaxial double fans to effectively suck away oil smoke, reduce oil smoke pollution of kitchen air and ensure the health of personnel.

The technical scheme adopted by the invention is as follows: the utility model provides a smoke ventilator of putting out a fire of cooling based on R744 refrigerant, includes position appearance guiding mechanism, casing, first pipe, second pipe, third pipe, fourth pipe, automatically controlled choke valve, condenser, compressor, bellows, pipe network, atomising head, first fan, lower motor, goes up motor, its characterized in that of second fan: the pose adjusting mechanism has six degrees of freedom and can monitor the thermal imaging condition of the cooking bench, the shell is of a multilayer hemispherical structure, a pipe network, a first fan, a lower motor, an upper motor and a second fan are arranged in the oil smoke purifier, R744 refrigerant medium filled in the pipe network is used for cooling high-temperature oil smoke and extinguishing a fire source of a cooking bench, the lower motor drives the first fan to rotate to realize the suction effect on the oil smoke, the upper motor drives the second fan to rotate to supplement the first fan, the corrugated pipe has the function of expansion and contraction and can lead the interior of the shell to be communicated with a flue in a building body, therefore, the cooled oil smoke is discharged to the outside through the flue, the compressor is used for compressing R744 refrigerant gas, the condenser is used for reducing the temperature of the R744 refrigerant gas, the high-pressure gas is changed into high-pressure liquid from high-pressure gas, and the electronic control throttle valve is used for regulating and controlling the speed of the high-pressure liquid R744 refrigerant flowing into a pipe network.

Further, the pose adjusting mechanism comprises a static platform, six electric cylinders, a thermal imager and a movable platform, wherein the rear ends of the six electric cylinders and the static platform form a spherical pair, the front ends of the six electric cylinders and the movable platform form a spherical pair, the static platform, the movable platform and the six electric cylinders form a Stewart mechanism with six degrees of freedom, the lower end of the static platform is provided with the thermal imager which can dynamically monitor the distribution and the change of a heat source on a cooking bench, the static platform is fixedly arranged on a wall surface, the movable platform is fixedly connected with a shell, the shell has six degrees of freedom, the shell is hemispherical with a three-layer structure and sequentially comprises an inner shell, a middle shell and an outer shell from inside to outside, the inner shell is provided with a strip-shaped air inlet groove, the center of the inner shell is provided with a downward convex hemispherical cavity structure, the middle shell is of a circular hole net structure, the lower motor is a hollow shaft motor, namely the center of an output shaft, the first fan is installed between the inner shell and the middle shell, the center of the first fan is fixedly connected with the lower motor output shaft, six fan blades of the first fan are of a spherical arc blade structure and can smoothly rotate between the inner shell and the middle shell, oil smoke is pumped to pass through the strip-shaped air inlet grooves in the inner shell and the round hole net structure of the middle shell to enter a cavity between the middle shell and the outer shell, the second fan is installed in a hemispherical cavity protruding downwards in the inner shell, the upper motor is fixedly installed at the upper end of the lower motor, the output shaft of the upper motor passes through the hollow shaft of the lower motor and is fixedly connected with the center of the second fan, the lower end of the corrugated pipe is communicated with the upper end of the outer shell.

Further, the pipe network includes the lower ring storehouse, go up the ring storehouse, the cooling tube, go into the pipe, zhonghuan storehouse, the exit tube, the pipe network is hemisphere cage-shaped structure, install in the cavity between middle shell and the shell, go up the ring storehouse and install in the shell upper end outside with the lower ring storehouse, a plurality of cooling tube circumference evenly distributed, six income pipe circumference evenly arrange, every goes into the pipe upper end all with lower ring storehouse intercommunication, lower extreme and all cooling tube lower extremes intercommunication, six income pipe lower extremes still communicate with six atomising heads respectively, every inside normally closed solenoid valve that all is equipped with of atomising head, all cooling tube upper ends all with zhonghuan storehouse switch-on, six exit tubes realize zhonghuan storehouse and the intercommunication in last ring storehouse.

Further, the condenser is installed in outdoor ventilation good benefit, its lower extreme is equipped with left storehouse and right storehouse, right storehouse passes through the third pipe and communicates with the entry end of automatically controlled choke valve, the exit end of automatically controlled choke valve is through first pipe and lower ring storehouse intercommunication, left storehouse passes through fourth pipe and compressor exit end intercommunication, the compressor entry end passes through the second pipe and communicates with last ring storehouse, the condenser upper end is equipped with violently the pipe, left storehouse is through five tubular metals and violently pipe intercommunication, right storehouse is through five tubular metals and violently pipe intercommunication, violently manage and left storehouse, be equipped with the multilayer between the right storehouse and be used for the fin of condensation R744 refrigerant, fin one side is equipped with the radiator fan who is used for accelerating the air flow, the pipe network, first pipe, the second pipe, the third pipe, the fourth pipe, the compressor, be full of R744 refrigerant in the closed cavity that automatically controlled choke valve and.

Furthermore, the second fan can make up the problem of insufficient suction force at the center of the first fan, and the first fan and the second fan can be used in combination to achieve better suction effect on oil smoke;

further, the cooling process of the high-temperature oil smoke is as follows: the compressor becomes the high-pressure gaseous state through the low pressure gaseous state R744 refrigerant compression in the second pipe with the pipe network, and carry to the left storehouse of condenser through the fourth pipe, the gaseous R744 refrigerant of high pressure is by the left storehouse through the in-process of violently managing circulation to right storehouse, via the cooling of fin and radiator fan, become the liquid R744 refrigerant of high pressure, and via the third pipe, automatically controlled choke valve, first pipe circulation becomes the liquid R744 refrigerant of low pressure to the pipe network, under the suction effect of first fan and second fan, after the high temperature oil smoke carries out abundant heat exchange with the low pressure liquid R744 refrigerant in the cooling tube, the high temperature oil smoke becomes low temperature oil smoke and arranges to outdoors through bellows and building body flue, the liquid R744 refrigerant of low pressure becomes the gaseous R744 refrigerant of low pressure, get into next cooling cycle after the compressor is the high pressure gaseous state again.

Further, the fire extinguishing process for the fire on the cooking bench is as follows: the thermal imager can dynamically monitor the distribution and the change of a heat source on a cooking bench, if an unknown fire source appears suddenly at a certain position on the cooking bench, the position and orientation adjusting mechanism rapidly adjusts the shell to the position above the unknown fire source, the electronic control throttle valve is rapidly opened, after a high-pressure liquid R744 refrigerant in the right bin rapidly enters a pipe network, the normally closed electromagnetic valves in the six atomizing heads are opened, the high-pressure liquid R744 refrigerant is enabled to be atomized and sprayed onto the unknown fire source, the liquid carbon dioxide can absorb a large amount of heat energy by vaporization due to the fact that the component of the R744 refrigerant is carbon dioxide, the temperature of the fire source is rapidly reduced, the carbon dioxide can isolate the contact of combustible substances and oxygen, and therefore the technical effect of fire extinguishing after the cooking bench catches fire.

The invention has the beneficial effects that: compared with the traditional square range hood, the range hood has a hemispherical structure, is designed in accordance with fluid mechanics, has a more obvious oil fume suction effect, and is not easy to overflow and disperse; when the rotating speed of the fan is constant, the linear velocity of the fan blades is smaller and the suction force is smaller as the fan blades approach the center, and a coaxial double-fan structure is formed by the first fan and the second fan, so that the condition that the suction force of the fan is insufficient when the first fan approaches the center is effectively avoided, and the oil smoke suction effect is more obvious; the cooling system consisting of the condenser and the pipe network can effectively reduce the temperature of the oil smoke and prevent the high-temperature oil smoke from igniting the flue; the Stewart mechanism can lead the spray head to aim at the ignition point to spray the R744 refrigerant, and can effectively extinguish the fire source on the cooking bench; liquid carbon dioxide is used as a fire extinguishing agent, so that the fire extinguishing agent has the advantages of high fire extinguishing efficiency, no additional harmful gas, no need of cleaning the fire extinguishing agent after the fire extinguishing agent is removed, and the like.

Drawings

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

Fig. 2 is a partial sectional view of the housing portion of the present invention.

Fig. 3 is a schematic sectional view of the housing part according to the present invention.

Fig. 4 is a schematic view of a pose adjusting mechanism according to the present invention.

Fig. 5 is a schematic structural diagram of the first fan.

Fig. 6 is a schematic view of the structure of a pipe network.

Reference numerals: the device comprises a posture adjusting mechanism 1, a static platform 1.1, an electric cylinder 1.2, a thermal imager 1.3, a movable platform 1.4, a shell 2, an outer shell 2.1, an intermediate shell 2.2, an inner shell 2.3, a first pipe 3.1, a second pipe 3.2, a third pipe 3.3, a fourth pipe 3.4, an electric control throttle valve 4, a condenser 5, a left cabin 5.1, a right cabin 5.2, a cooling fan 5.3, a horizontal pipe 5.4, a compressor 6, a corrugated pipe 7, a pipe network 8, a lower annular cabin 8.1, an upper annular cabin 8.2, a cooling pipe 8.3, an inlet pipe 8.4, an intermediate ring 8.5, an outlet pipe 8.6, a spray head 9, a first fan 10, a lower motor 11, an upper motor 12 and a second fan 13.

Detailed Description

The present invention will be further described with reference to specific examples, which are illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 1, 2, 3, and 4, a temperature-reducing and fire-extinguishing range hood based on R744 refrigerant includes a posture adjustment mechanism 1, a housing 2, a first pipe 3.1, a second pipe 3.2, a third pipe 3.3, a fourth pipe 3.4, an electrically controlled throttle valve 4, a condenser 5, a compressor 6, a bellows 7, a pipe network 8, a spray head 9, a first fan 10, a lower motor 11, an upper motor 12, and a second fan 13, and is characterized in that: the pose adjusting mechanism 1 has six degrees of freedom and can monitor the thermal imaging condition of the cooking bench, the shell 2 is of a multilayer hemispherical structure, a pipe network 8, a first fan 10, a lower motor 11, an upper motor 12 and a second fan 13 are arranged in the oil smoke purifier, R744 cold medium filled in the pipe network 8 is used for cooling high-temperature oil smoke and extinguishing a fire source of a cooking bench, the lower motor 11 drives the first fan 10 to rotate to realize the suction effect on the oil smoke, the upper motor 12 drives the second fan 13 to rotate to supplement the first fan 10, the corrugated pipe 7 has the function of expansion and contraction to suck the oil smoke, the inside of the shell 2 can be communicated with a flue in a building body, therefore, the cooled oil smoke is discharged to the outside through the flue, the compressor 6 is used for compressing R744 refrigerant gas, the condenser 5 is used for reducing the temperature of the R744 refrigerant gas, the high-pressure gas is changed into high-pressure liquid from high-pressure gas, and the electronic control throttle valve 4 is used for regulating and controlling the speed of the high-pressure liquid R744 refrigerant flowing into the pipe network 8.

As shown in fig. 2, 4 and 5, the pose adjusting mechanism 1 includes a static platform 1.1, six electric cylinders 1.2, a thermal imager 1.3 and a movable platform 1.4, the rear ends of the six electric cylinders 1.2 and the static platform 1.1 all form a spherical pair, the front ends of the six electric cylinders 1.2 and the movable platform 1.4 all form a spherical pair, the static platform 1.1, the movable platform 1.4 and the six electric cylinders 1.2 form a Stewart mechanism with six degrees of freedom, the lower end of the static platform 1.1 is provided with the thermal imager 1.3 capable of dynamically monitoring the distribution and change of a heat source on a cooking bench, the static platform 1.1 is fixedly installed on a wall surface, the movable platform 1.4 and the shell 2 are tightly connected, the shell 2 has six degrees of freedom, the shell 2 is of a three-layer structure, the inner shell 2.3, the middle shell 2.2 and the outer shell 2.1 are hemispherical from inside to outside, the inner shell 2.3 is provided with a strip-shaped groove, the center position thereof is provided with a hemispherical cavity structure protruding downwards, the middle shell 2.2 is a hollow shaft motor, and the lower motor is, namely, the center of an output shaft of the lower motor 11 is in a hollow structure, the lower motor 11 is fixedly installed at the upper end of the middle shell 2.2, the first fan 10 is installed between the inner shell 2.3 and the middle shell 2.2, the center of the first fan 10 is fixedly connected with the output shaft of the lower motor 11, six fan blades of the first fan 10 are all in a spherical arc blade structure and can smoothly rotate between the inner shell 2.3 and the middle shell 2.2, oil smoke is pumped to pass through a strip-shaped air inlet groove in the inner shell 2.3 and a circular hole net structure of the middle shell 2.2 to enter a cavity between the middle shell 2.2 and the outer shell 2.1, the second fan 13 is installed in a downward convex hemispherical cavity of the inner shell 2.3, the upper motor 12 is fixedly installed at the upper end of the lower motor 11, the output shaft of the upper motor 12 passes through a hollow shaft of the lower motor 11 and is fixedly connected with the center of the second fan 13, the lower end of.

As shown in fig. 2 and 6, the pipe network 8 includes a lower ring bin 8.1, an upper ring bin 8.2, cooling pipes 8.3, inlet pipes 8.4, a middle ring bin 8.5, and outlet pipes 8.6, the pipe network 8 is a hemispherical cage-shaped structure and is installed in a cavity between the middle shell 2.2 and the shell 2.1, the upper ring bin 8.2 and the lower ring bin 8.1 are installed outside the upper end of the shell 2.1, the plurality of cooling pipes 8.3 are circumferentially and uniformly distributed, six inlet pipes 8.4 are circumferentially and uniformly arranged, the upper end of each inlet pipe 8.4 is communicated with the lower ring bin 8.1, the lower end of each inlet pipe is communicated with the lower ends of all cooling pipes 8.3, the lower ends of six inlet pipes 8.4 are also communicated with six atomizing heads 9, a normally closed electromagnetic valve is arranged inside each atomizing head 9, the upper ends of all cooling pipes 8.3 are communicated with the middle ring bin 8.5, and the six outlet pipes 8.6 achieve the communication between the middle ring bin 8.5.

As shown in fig. 1, the condenser 5 is installed in the outdoor to achieve good ventilation, the lower end of the condenser is provided with a left chamber 5.1 and a right chamber 5.2, the right chamber 5.2 is communicated with the inlet end of an electric control throttle valve 4 through a third pipe 3.3, the outlet end of the electric control throttle valve 4 is communicated with a lower ring chamber 8.1 through a first pipe 3.1, the left chamber 5.1 is communicated with the outlet end of a compressor 6 through a fourth pipe 3.4, the inlet end of the compressor 6 is communicated with an upper ring chamber 8.2 through a second pipe 3.2, the upper end of the condenser 5 is provided with a horizontal pipe 5.4, the left chamber 5.1 is communicated with the horizontal pipe 5.4 through five metal pipes, the right chamber 5.2 is communicated with the horizontal pipe 5.4 through five metal pipes, a plurality of layers of cooling fins for condensing R744 are arranged between the horizontal pipe 5.4 and the left chamber 5.1 and the right chamber 5.2, one, and a closed inner cavity formed by the pipe network 8, the first pipe 3.1, the second pipe 3.2, the third pipe 3.3, the fourth pipe 3.4, the compressor 6, the electric control throttle valve 4 and the condenser 5 is filled with an R744 refrigerant.

As shown in fig. 3, the second fan 13 can make up for the problem of insufficient suction force at the center of the first fan 10, and the first fan 10 and the second fan 13 can be used in combination to achieve better suction effect on oil smoke;

the embodiment of the invention comprises the following steps: as shown in fig. 1, the cooling process for high-temperature oil smoke: the compressor 6 compresses the low-pressure gas R744 refrigerant in the pipe network 8 into high-pressure gas through the second pipe 3.2, and is conveyed to a left bin 5.1 of a condenser 5 through a fourth pipe 3.4, in the process that high-pressure gaseous R744 refrigerant flows from the left bin 5.1 to a right bin 5.2 through a transverse pipe 5.4, the refrigerant is changed into a high-pressure liquid R744 refrigerant through the cooling of the radiating fins and the radiating fan 5.3, and the refrigerant is changed into a low-pressure liquid R744 refrigerant through a third pipe 3.3, an electric control throttle valve 4 and a first pipe 3.1 and flows to a pipe network 8, under the suction action of the first fan 10 and the second fan 13, after the high-temperature oil smoke and the low-pressure liquid R744 refrigerant in the cooling pipe 8.3 carry out sufficient heat exchange, the high-temperature oil smoke is changed into low-temperature oil smoke and is exhausted to the outside through the corrugated pipe 7 and the building body flue, the low-pressure liquid R744 refrigerant is changed into a low-pressure gaseous R744 refrigerant, and the low-pressure gaseous R744 refrigerant is compressed into a high-pressure gaseous state by the compressor 6 and then enters the next cooling cycle.

Fire extinguishing process for fire on cooking bench: the thermal imager 1.3 can dynamically monitor the heat source distribution and change on the hearth, if an unidentified fire source appears suddenly at a certain position on the hearth, the pose adjusting mechanism 1 rapidly adjusts the shell 2 to the position above the unidentified fire source, the electronic control throttle valve 4 is rapidly opened, after a high-pressure liquid R744 refrigerant in the right bin 5.2 rapidly enters the pipe network 8, the normally closed solenoid valves in the six spray heads 9 are opened, so that the high-pressure liquid R744 refrigerant is sprayed onto the unidentified fire source in a vaporific manner, because the component of the R744 refrigerant is carbon dioxide, the liquid carbon dioxide can absorb a large amount of heat energy by vaporization, the temperature of the fire source is rapidly reduced, the carbon dioxide can isolate the contact of combustible and oxygen, and the technical effect of fire extinguishing after the hearth catches fire is realized.

The references to "front", "back", etc., are based on the orientation or positional relationship shown in the drawings or as they are conventionally placed during use of the inventive product, and are intended to facilitate the description of the invention and to simplify the description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.