CN117679685A

CN117679685A - Intelligent fireproof cleaning device for smoke exhaust hood

Info

Publication number: CN117679685A
Application number: CN202410114221.5A
Authority: CN
Inventors: 张胤桢
Original assignee: Individual
Current assignee: Individual
Priority date: 2024-01-28
Filing date: 2024-01-28
Publication date: 2024-03-12

Abstract

An intelligent fireproof cleaning device for a smoke exhaust hood is provided with a cleaning device and a fireproof device which is connected with an intelligent programming controller. A temperature control switch is arranged in the air port of the electric air valve and is connected with the electric air valve and the electromagnetic valve power supply of the water supply pipe. When the air flow temperature reaches the upper control limit, the temperature control switch controls the electric air valve to be closed, the electromagnetic valve of the water supply pipe is opened to spray water mist, and the fire is extinguished and cooled. The exhaust hood is internally provided with steam nozzles which are uniformly distributed and are in sealing connection with the steam generator, so that the exhaust hood purification device and the purification channel can be subjected to steam cleaning. Ultraviolet light tubes which are parallel to the purifying device are uniformly distributed at the center of the purifying device and are connected with a power supply, and ultraviolet light cleaning is performed on the purifying device. And (3) electrically heating graphite wires of the multi-layer screens connected in series with the electrostatic screens, recovering the adsorption capacity and the conductivity of the graphite wires, and arranging a temperature control switch close to the electrostatic screens to control the heating temperature.

Description

Intelligent fireproof cleaning device for smoke exhaust hood

Technical Field

The invention relates to an intelligent fireproof cleaning device arranged in a smoke exhaust hood. A temperature control switch and a steam nozzle are arranged in the fume exhaust hood, an intelligent programming controller controls the cleaning period and time of the fume exhaust hood, and when the air flow temperature reaches the preset temperature, an electric air valve is closed, and a spray fire extinguishing program is started.

Background

The existing kitchen hearth fireproof and fire-extinguishing facilities are wet or dry, and complex systems are installed outside the smoke exhaust hood. Is provided with a control device, a fire extinguishing device, a temperature-sensing smoke sensor and a complex pipeline. Most of fires caused by kitchen cooking tops are oil cookers ignited by open flame, or the open flame enters the smoke exhaust hood to cause dirty oil to ignite, and the dirty oil spreading into the air pipe to ignite, so that a fireproof and fire extinguishing system arranged outside the smoke exhaust hood is also ineffectively. Temperature sensing, smoke sensing sensors and complex pipelines of hearth fire-proof and fire-extinguishing facilities are arranged on the upper part of a kitchen range at the lower part of the smoke exhaust hood, dirty oil and sewage can be easily condensed every day, and the cleaning is inconvenient. When a fire disaster occurs, the fire disaster spreads into the smoke exhaust hood and the air pipe, the fire extinguishing system starts to spray the fire extinguishing agent to extinguish the fire, the sprayed fire extinguishing agent can pollute kitchen cooking equipment and food materials, the fire extinguishing agent is polluted and is harmful to human bodies, the fire extinguishing agent is cleaned, time and labor are wasted, and normal business is influenced.

Various oil smoke purifiers are required to be cleaned regularly due to the fact that dirty oil, sewage and stains are condensed, and most of the oil smoke purifiers are required to be disassembled, taken out and cleaned and then assembled again. The purifying equipment is large in size and large in maintenance workload, most of the purifying equipment is arranged at the tail end of an exhaust system, is arranged in the exhaust hood and at the front end of the main air pipe, is full of dirty oil, is easy to cause fire, and is difficult and troublesome for a general chef to be unfamiliar with the disassembly and assembly process. The cleaning efficiency of the purifier is affected by the incapability of cleaning on time, the air is polluted, and the food safety and the environmental sanitation are also easily affected. Periodic cleaning increases maintenance and cleaning costs.

Disclosure of Invention

In order to overcome the defects of the existing known smoke exhaust hood in terms of fire prevention and extinguishment and internal periodic cleaning functions, the invention aims to provide an intelligent fire prevention cleaning device arranged in the smoke exhaust hood.

The automatic fire-proof and fire-extinguishing device and the automatic cleaning device controlled by the programming controller are arranged in the smoke exhaust hood. The automatic fire-proof and fire-extinguishing device can extinguish fire by cutting off the fire source and the water mist. When the air flow temperature exceeds the upper temperature limit or open fire exists, the working flow of fire prevention and extinguishment is automatically entered, the electric air valve is closed, water mist is sprayed to extinguish fire and reduce temperature, and the source blocks and blocks the open fire of burning smoke and steam.

Manual control or intelligent cleaning workflow can be set according to actual application. There are 3 ways of automatic cleaning: steam cleaning: a steam nozzle for cleaning dirty oil is arranged in the fume exhaust hood and is in sealing connection with the instant heating type steam generator and the electromagnetic valve of the water supply pipe, and the fume purifying device and the inside of the fume exhaust hood are cleaned by steam. And (3) electric heating and cleaning: the graphite wires are used for conducting heating, dirty oil and stains on the graphite wires of the graphite gill purifier can be removed, and a temperature control switch and a high-temperature control switch are arranged in the graphite gill purifying cavity and are connected with a heating dirt removing switch, a high-temperature control switch and a power supply of a control box panel. And controlling the conductive heating temperature of the graphite wire, and removing dirty oil stains on the graphite wire. Optical cleaning: an ultraviolet lamp tube is arranged in the center of the purifying device and is parallel to the purifying device, so that ultraviolet light irradiates the purifying device, and pollutants are decomposed into carbon dioxide and water vapor by utilizing the strong irradiation energy of ultraviolet light and the photosensitive effect of hydrocarbon on strong absorption capacity of ultraviolet light, so that adhered organic pollutants are removed from the surface of the purifying device. The cleaning time period can be determined according to actual needs, and can be manually controlled or intelligently controlled at any time, so that the front end of the smoke exhaust system is purified, and dirty oil accumulated in the smoke exhaust hood and the air duct is eliminated. The problems of time consuming and labor consuming cleaning and high cost are solved.

The invention relates to a fire-proof cleaning device for a smoke exhaust hood, which adopts the following technical scheme: the fire-proof cleaning device for the fume exhaust hood is combined with the specific structure in the fume exhaust hood. The following technical scheme is that the fire-proof cleaning device of the fume-exhausting hood is arranged in the energy-saving fume-exhausting hood, and the fume-exhausting hood is purified by a graphite gill purifying device. Each kitchen ware device for generating smoke steam is provided with a purification channel in the smoke exhaust hood, a smoke collecting box is formed by communicating spaces at the upper parts of the purification channels, and the top plate of the smoke exhaust hood is directly communicated with an exhaust main pipe. Each purifying channel is provided with an electric air valve and a graphite gill purifying device which are communicated with the main air pipe. The fume exhaust hood is provided with a fume exhaust hood panel, the outside of the fume exhaust hood panel which leans forwards is provided with a fume storage hood, and the inside of the fume exhaust hood panel is provided with mutually-separated purifying channels. The fume hood is a fume hood extending forwards, and the fume hood consists of a fume hood inclined top plate, a fume hood plate and a coaming plate, and the fume hood fume space is communicated with the fume hood. The lower part of the gas storage cover coaming is provided with a U-shaped diversion trench and the U-shaped diversion trench of the side plate of the fume exhaust cover is connected with an oil receiving tank at the lower part of the fume exhaust cover, and the bottom of the oil receiving tank is provided with a drain valve. The fume exhaust cover plate is fixedly connected with the fume exhaust cover side plate, the fume exhaust cover inclined plate is a 3-section panel, and the upper overhaul plate, the lower overhaul plate and the electric air valve inclined plate are arranged on the fume exhaust cover plate. The lower electric air valve inclined panel is parallel to the U-shaped diversion trench of the fume exhaust hood side plate, a cleaning U-shaped diversion trench interval is reserved, and the lower part of the electric air valve inclined panel is inserted into the oil receiving groove to be connected with the rear vertical plate. The upper overhaul plate, the lower overhaul plate and the electric air valve inclined plate of the smoke exhaust cover plate are combined with the length design of the smoke exhaust cover, the width of the smoke exhaust cover plate is generally equal to the width of 2 purifying channels, the height of the upper overhaul plate and the height of the lower overhaul plate correspond to the height of the air outlet graphite gills and the height of the air inlet graphite gills, the installation and the overhaul are convenient, the inclined angle of the electric air valve inclined plate is fixedly connected, the upper part of the 3 sections of plates is inserted into the lower part of the upper part of the plates to be connected, an open small gap is reserved at the connection part, the smoke exhaust cover plate is fixed by screws, and condensed liquid flows into the connection gap along the plates to prevent dripping.

The device is opposite to each device for generating smoke, a purifying channel is arranged in the smoke exhaust hood, a purifying channel air port is arranged at the position of an electric air valve inclined panel at the lower part of a smoke exhaust hood panel opposite to a smoke source, an electric air valve is arranged on the inclined panel inclining forwards through an air valve flange, and a temperature control switch is arranged in the middle of the air inlet of the electric air valve. The purification channel is provided with a purification channel baffle plate, the purification channel is longitudinally and fixedly connected with a smoke exhaust cover plate and a rear vertical plate of the smoke exhaust cover, the lower part of the purification channel is propped against the inclined plate of the electric air valve, and the upper part of the purification channel is fixedly sealed with the transverse middle baffle plate. The middle partition board is transversely sealed and connected with the two-sided purifying channel partition board, the fume exhaust hood panel and the fume exhaust hood rear vertical plate through fixing angle bars and screws, and divides the purifying channel of the fume exhaust hood and the graphite gill purifying device into an upper part and a lower part. The graphite gill purification device is arranged at the center of the middle partition plate in the purification channel, and air flow channels are reserved between the graphite gill purification device and the four-sided wall plates of the purification channel, so that smooth circulation of air flow is ensured, and circulation resistance is reduced. The graphite gill purifying device is divided into an air inlet graphite gill and an air outlet graphite gill, the air inlet graphite gill is fixed at the lower part of the middle partition board, the air outlet graphite gill is fixed at the upper part of the middle partition board, and a ventilation opening is reserved on the middle partition board and is communicated with the two graphite gill purifying cavities. The upper part of the middle partition plate is provided with a plurality of communicating spaces of the purifying channels, the flow cross section area is increased, a smoke collecting box is formed, and the top plate of the smoke exhaust cover is directly communicated with the main air exhaust pipe. Each purifying channel is provided with an electric air valve, and air flows through an air inlet graphite gill, an air outlet graphite gill, a smoke collecting box and an air exhaust main pipe in the purifying channels to be led to a smoke exhaust fan. A power supply control box is arranged on a front panel of the gas storage cover, which extends forwards, an intelligent programming controller, a high-voltage electrostatic power supply and a power supply are arranged in the power supply control box, and a control switch such as a steam cleaning switch, an electric heating switch and a high-temperature heating switch and a system operation display screen are arranged on the panel of the power supply control box.

The upper part of the lower access plate in the middle of the purification channel is provided with a negative pressure air suction port, and a negative pressure short pipe is arranged in the lower access plate to be communicated with the purification channel. A one-way air valve is arranged in the negative pressure short pipe and is subjected to negative pressure of the fan, the one-way air valve is opened, and when the fan is shut down, the one-way air valve is closed to prevent steam from overflowing when the steam washes graphite gills in the smoke exhaust hood. The gas-storage cover of the fume-exhausting cover has a gas-storage space with the same length as the fume-exhausting cover, and can contain the escaping fume of the whole fume-exhausting cover. The negative pressure air suction port is arranged in the air storage cover opening, and the negative pressure of the fan intercepts and absorbs the escaping smoke through the negative pressure short pipe. The cross section area of the negative pressure air suction openings is very small and is only a few tenth of the flow cross section area of the purification channel, and the air exhaust effect of the electric air valve air opening cannot be affected. The sucked smoke is purified and discharged out of the smoke exhaust hood through the graphite gill purifying device. Part of the sucked smoke passes through the graphite gill purifying device without a high-voltage electrostatic field, and as the flow is very small and the flow speed is very low, the graphite net wires of the graphite gill purifying device have adsorption capacity and can also be used for interception, adsorption and purification.

The graphite gill purifying device consists of a high-voltage electrostatic field between the graphite gill and an electrostatic screen. According to the purification channel inner structure graphite gill purifier, set up to the graphite gill purifier of air inlet graphite gill and air-out graphite gill intercommunication, two purification chamber are all with graphite gill and electrostatic screen cloth enclose into the tubbiness, and the chamber end that air inlet graphite gill was equipped with is equipped with the blowdown hole and leads to the oil receiving groove through the blow off pipe at the chamber end. The air inlet graphite gill and the air outlet graphite gill are provided with barrel-shaped graphite gills, the barrel-shaped graphite gills are provided with upper and lower annular plates with the same size, the upper and lower annular plates are fixed on a middle partition plate through insulating porcelain posts, the flow area between the upper and lower annular plates and the air inlet graphite gill is reserved on the middle partition plate, the flow area is communicated with the air outlet graphite gill, the air outlet graphite gill is provided with a cavity cover, the graphite gills and the electrostatic screen of the air inlet graphite gill are arranged along the direction of air flow, the air flow enters from the graphite gills, and the air flow vertically passes through the electrostatic screen. All air flows pass through the graphite gills of the air inlet graphite gills and the air outlet graphite gills and the electrostatic screen.

The four-side electrostatic screen mesh of the air inlet graphite gill is arranged in the air inlet graphite gill, and a circulating air port between the four-side electrostatic screen mesh and the air outlet graphite gill is reserved on the middle partition plate and communicated with the air outlet graphite gill. Four sides electrostatic screens are arranged on the periphery of the air-out graphite gill, and the cavity cover is fixedly connected with the four sides electrostatic screens. The graphite gills of the air inlet and the air outlet and the electrostatic screen are arranged along the direction of the air flow, the air flow enters from the graphite gills, the graphite gill line is along the direction of the air flow, and the air flow vertically passes through the electrostatic screen. The graphite gill is connected with the positive electrode of the high-voltage electrostatic power supply, the electrostatic screen is connected with the negative electrode of the high-voltage electrostatic power supply, and the graphite gill line stretches to the electrostatic screen to leave equal electric field gaps.

The graphite gill imitates the structure that the gill bow of the fish is fully distributed with gill wires along the water flow direction. A metal plate is used as a strip-shaped gill plate, graphite lines are used as graphite gill lines, a waist-shaped opening is uniformly formed in one air inlet side of the strip-shaped gill plate, a plurality of equal-length graphite gill lines are fixedly wound in the waist-shaped opening, and the strip-shaped gill plates are uniformly fixed on one air inlet side between the upper annular fixed ring plate and the lower annular fixed ring plate of the graphite gill. And a waist-shaped hole which is vertically symmetrical is uniformly formed in one surface of the air inlet between the upper annular plate and the lower annular plate of the air inlet graphite gill, shaft plates are arranged at two ends of one air inlet side of the strip-shaped gill plate, the height of each shaft plate is equal to the thickness of each annular plate, and the shaft plates are inserted into the waist-shaped holes of the upper annular plate and the lower annular plate and are fixed. A waist-shaped opening is uniformly formed on the air inlet side of the strip-shaped gill plate, a plurality of equal-length graphite gill lines are wound in the waist-shaped opening, and the opening clamps clamp and fix the graphite gill lines on the air inlet side of the strip-shaped gill plate. The strip gill plate is uniformly fixed on the outer edge of the air inlet surface between the upper annular ring plate and the lower annular ring plate of the graphite gill. The opening clamp is equal to the distance between the upper annular plate and the lower annular plate, one side pressed by the metal strip is provided with an arc, the diameter of the arc of the opening clamp is larger than the diameter of the graphite lines added on the thickness of the strip-shaped gill plate, the lengths of the two sides of the opening clamp exceed the waist-shaped opening length of the strip-shaped gill plate, and the arc which is wound outwards is arranged, so that the strip-shaped gill plate is convenient to insert into the opening clamp to clamp and fix the graphite lines. The strip-shaped gill plate and the opening clamp are respectively provided with a pin hole at two ends, the opening clamp clamps the strip-shaped gill plate, and the strip-shaped gill plate and the opening clamp are inserted into the connecting steel wires for fixation. The parallel strip gill plates and the annular plates are uniformly distributed between the upper annular plate and the lower annular plate, the edge distances of the strip gill plates and the annular plates are equal, the lengths of the strip gill plates wound into a plurality of graphite gill lines are equal, and the distances between the graphite gill lines of the strip gill plates extending to the electrostatic screen are equal. The parallel strip gill plates are uniformly fixed on one side of the air inlet between the upper annular plate and the lower annular plate, namely uniformly fixed on one side of the outer edge of the air inlet graphite gill and uniformly fixed on one side of the inner edge of the air outlet graphite gill. The upper annular plate of the air inlet graphite gill is fixed with the lower part of the middle partition plate through the insulating porcelain column and the insulating plate, and the lower annular plate is fixedly connected with the cavity bottom through the insulating porcelain column and the insulating plate. The lower annular plate of the air-out graphite gill is fixed with the upper part of the middle partition plate through the insulating porcelain column and the insulating plate, and the upper annular plate is fixed with the air-out graphite gill cavity cover through the insulating porcelain column and the insulating plate.

The graphite gill is connected with the positive electrode of the high-voltage electrostatic power supply, the electrostatic screen is connected with the negative electrode of the high-voltage electrostatic power supply, and the graphite gill line stretches to the electrostatic screen to leave equal electric field gaps. Under the action of high-voltage electric fields of the graphite gills and the electrostatic screen, each bundle of equal-length graphite gill lines diverges into a radial shape and extends to the electrostatic screen, and the repulsive force of the high-voltage electrostatic field and charges enables each graphite gill line to be kept at equal distance from the tips of other graphite gill lines. The dynamic graphite gill line tip swings in a small range caused by airflow disturbance and tip stains in the flow section, and is always and automatically uniformly distributed, and the distance is very small. When particles with different charges are close, attractive force can enable the tips of the peripheral graphite gill lines to be pulled close to each other for adsorption, and the purification rate of pollutants in the air flow can be increased. The dynamic graphite gill lines are uniform in spacing and small in spacing, electrostatic voltage is reduced, energy is saved, consumption is reduced, and safety and reliability are improved. All air flows pass through the graphite gills of the air inlet graphite gills and the air outlet graphite gills and the electrostatic screen. The pollution particles are adsorbed on the graphite wire mesh of the electrostatic screen by the adsorption action of the graphite wire mesh and the adsorption force of the high-voltage electrostatic field in the electrostatic field of the multi-layer wire mesh screen, so that very small particles such as VOC, bacterial virus and the like are difficult to pass through the dense multi-layer wire mesh screen and are adsorbed on the graphite wire mesh of the electrostatic screen. All the polluted air flows pass through a high-voltage electrostatic field of the graphite gills and the electrostatic screen, the electric field intensity is controlled to exceed the ionization field intensity of the air, the air is ionized, ozone is generated, oxidation reaction is generated between the ozone and polluted particles, and the polluted particles are analyzed.

The electrostatic screen is a rectangular right-angle frame, the inner flow vent is provided with a plurality of layers of same net wire strip nets, the same layers of net wire strip nets are installed on the same flow section in a closed parallel manner, four corners of each layer of net wire strip net are isolated and insulated by insulating gaskets, and the electric field insulation distance is ensured. Two ends of the net line net frame are respectively provided with 2 symmetrical insulating mounting holes, the two symmetrical insulating mounting holes are fixed on screw rods at two ends in the rectangular net disc frame, and the multi-layer net line net and the insulating gaskets are fixed in the rectangular net disc frame by nuts. The insulating strip frame of the net line net is symmetrically provided with a plurality of fixed insulating cylinders, graphite lines are wound on a plane in parallel by using one graphite line, and the parallel graphite lines are not contacted with each other and are fixed with the insulating cylinders. The graphite lines of the multi-layer net lines are parallel and staggered at intervals, so that the probability of blocking collision pollutants is increased. Each layer of graphite wire net is provided with a plurality of net wire nets on the same flow section, the graphite wire nets of the multi-layer net wire nets keep a flow distance, each layer of net wire nets are connected with a porous socket of the electrostatic screen through cables and insulating wire pipes in insulating strip frames, the multi-layer net wire nets are connected with a high-voltage electrostatic power supply through the porous socket, and the graphite wires of the net wire nets are connected with a power supply in series. The polluted air flow passes through the strip-shaped gill plates and the radial graphite gill lines, and polluted particles are adsorbed on the graphite gill lines or are charged by a graphite gill line electric field, and the graphite net electric field flowing to the electrostatic screen is adsorbed.

The graphite fiber is a high-performance carbon material, has excellent performances of low density, high specific strength, high specific modulus, low thermal expansion coefficient, heat conduction, electric conduction, high temperature resistance, flame retardance, corrosion resistance, fatigue resistance, abrasion resistance, easy cleaning and maintenance, good flexibility, convenient winding, convenient processing and the like compared with a common metal wire, and has a special three-dimensional ordered graphite layered structure, so that the graphite fiber has excellent mechanical, electrical and adsorption properties, has special hydrophobic and oleophilic properties, and can effectively adsorb pollutants such as dust, VOC, bacterial virus, oil fume, particulate matters and the like. The utility model provides an intelligent fire prevention belt cleaning device of fume extraction hood, corresponds the equipment that produces the vapour, sets up the many purification channel that purification channel baffle cut off in the fume extraction hood, is equipped with fume extraction hood belt cleaning device, fume extraction hood's fire prevention device and intelligent programming controller, its characterized in that: an electric air valve is arranged on a front inclined panel of the fume exhaust hood, a normally open temperature control switch is arranged in an air port and is connected with a power supply of the electric air valve and a water supply pipe electromagnetic valve, graphite wires of a multi-layer electrostatic screen are connected with a power supply through series connection, the temperature control switch is frequently closed again, steam nozzles which are in sealing connection with a steam generator are uniformly distributed at an air inlet of a purifying device and are fixedly connected with the water supply pipe through the electromagnetic valve, and ultraviolet lamp tubes are uniformly distributed at the center of the purifying device and are connected with the power supply.

The graphite gill purification device is used for a period of time, dirt is fully accumulated on the graphite wires, micropores of the graphite fibers are blocked, the specific surface area is reduced, the graphite wires gradually lose adsorption capacity, the dirt on the surfaces of the graphite wires is reduced, the conductivity is reduced, the discharge capacity of the high-voltage electrostatic electric field is reduced, and the capacity of adsorbing particulate matters is also reduced. The graphite gill purification device needs to be cleaned regularly to remove stains on the graphite lines.

The automatic cleaning of the fume exhaust hood cleaning device has 3 modes: steam cleaning: a steam nozzle for cleaning dirty oil is arranged in the fume exhaust hood and is in sealing connection with the instant heating type steam generator and the electromagnetic valve of the water supply pipe, and the fume purifying device and the inside of the fume exhaust hood are cleaned by steam. And (3) electric heating and cleaning: the graphite wires are used for conducting heating, dirty oil stains on the graphite wires can be removed, and a temperature control switch and a high-temperature control switch are arranged in the graphite gill purifying cavity and are connected with a heating dirt removing switch, a high-temperature control switch and a power supply of a control box panel. And controlling the conductive heating temperature of the graphite wire, and removing dirty oil stains on the graphite wire. Optical cleaning: an ultraviolet lamp tube is arranged in the center of the purifying device and is parallel to the purifying device, so that ultraviolet light irradiates the purifying device, and pollutants are decomposed into carbon dioxide and water vapor by utilizing the strong irradiation energy of ultraviolet light and the photosensitive effect of hydrocarbon on strong absorption capacity of ultraviolet light, so that adhered organic pollutants are removed from the surface of the purifying device. The steam cleaning and the light cleaning have wide applicability, and the electric heating cleaning is a cleaning mode which is set for cleaning graphite line stains of the graphite gill cleaning device. The 3 cleaning modes can be matched for use, and generally, steam cleaning is carried out firstly, and then light cleaning and electric heating decontamination are carried out.

The steam cleaning mode is characterized in that steam nozzles are uniformly distributed at the lower part of the air inlet graphite gill air inlet, the steam nozzle spray angle faces the air inlet graphite gill air inlet and is in sealing connection with a steam pipe of the instant heating type steam generator, and a water pipe of the steam generator is fixedly connected with a main water pipe through a water adjusting valve and an electromagnetic valve. The method comprises the steps of starting a steam cleaning work flow, closing a variable frequency fan, closing an air inlet electric air valve, closing a high-voltage electrostatic power supply and a temperature control switch power supply, starting an electromagnetic valve of a power supply and a water supply pipe of an instant heating type steam generator, adjusting water flow through an adjusting water valve, entering the instant heating type steam generator, immediately changing into high-temperature water vapor, spraying the high-temperature vapor to an air inlet graphite gill through a steam pipe nozzle, heating and cleaning graphite net wires of the graphite gill and an electrostatic screen, filling high-temperature vapor in a purifying channel, heating by the high-temperature vapor, and enabling dirty oil stains to melt and flow, and removing pollutants adhered on the graphite wires by the high-temperature vapor and condensed hot water. The cleaned dirt and condensed water flow to a drain outlet arranged at the bottom of the air inlet graphite gill cavity, a drain pipe is arranged at the lower part of the drain outlet, the dirt and condensed water flow to an oil receiving groove at the lower part of the fume exhaust hood, and waste liquid is discharged through a drain valve. After steam cleaning, the variable frequency fan and the electric air valve are controlled to be opened, and condensed water and moisture of all components in the fume exhaust hood are dried.

After the graphite wires are cleaned by heating with steam for electric heating, the graphite wires are heated to 290-300 ℃ to recover the adsorption capacity and the electric conductivity of the graphite wires. The upper part of the air inlet graphite gill, which is close to the electrostatic screen, is fixed on the middle partition plate, and is provided with a 180-degree temperature control switch and a high-temperature control switch which are connected with a heating decontamination switch, a high-temperature heating switch and a power supply of a power supply control box panel. The 180-degree temperature control switch and the high-temperature control switch are normally closed switches, the heating decontamination switch is opened, the electric air valve is automatically closed, the air flow is cut off, the variable-frequency fan, the high-voltage electrostatic power supply and the electric air valve temperature control switch power supply are closed, and the heating effect and safety are ensured. The power supply supplies power to the multi-layer electrostatic screen graphite wires connected in series through the porous sockets through the 180-degree temperature control switch, the temperature reaches 180 degrees, the temperature control switch is started to disconnect the power supply, and the power supply is stopped. When the temperature is reduced, the temperature control switch is started to continue to be powered on and heated. The high-temperature control switch is a normally closed switch to start the high-temperature heating switch, the power supply supplies power to the graphite wires of the multi-layer electrostatic screen mesh connected in series through the porous socket through the high-temperature control switch to heat, the temperature reaches 300 ℃, and the high-temperature control switch is started to disconnect the power supply to stop power. When the temperature is reduced and the high-temperature control switch is started, the electric heating is continued. The graphite wires are heated by the conductive heating effect, the graphite wires of the graphite gills are baked and heated, and the graphite wires of the electrostatic screen mesh and dirty oil stains bonded by the graphite gills are melted and flow by the thermal effect, so that main dirty oil stains are removed, and the dirty oil stains drop to the oil receiving groove. When the graphite wire is heated to 300 ℃, the temperature is still lower than the ignition point of the dirty oil, and the dirty oil stains are roasted at high temperature, so that the stains of the graphite wire are oxidized, and the stains of the graphite wire are removed. Restoring the adsorption capacity and conductivity of graphite wires. And the water is recycled, so that secondary pollution is avoided.

Ultraviolet lamps are uniformly distributed in the central position between the upper annular plate and the lower annular plate of the air inlet graphite gill and the air outlet graphite gill of the graphite gill purifying device in an ultraviolet light cleaning mode and are parallel to the graphite gill purifying device, so that ultraviolet light irradiates graphite lines of the graphite gill purifying device, and pollutants are decomposed into carbon dioxide and water vapor by utilizing the strong irradiation energy of ultraviolet light and the photosensitive effect of hydrocarbon with strong absorption capacity on the ultraviolet light, so that adhered organic pollutants are removed from the surfaces of the graphite lines of the purifying device. The single-end 4-jack ultraviolet lamp tube is connected with the socket of the cavity cover plate through the seal of the protective silica gel sleeve, and the lower end of the ultraviolet lamp tube is fixedly connected with the cavity bottom plate. The ultraviolet lamp tube is provided with a ceramic lamp holder on the upper part and the lower part, is made of explosion-proof quartz glass, is resistant to high temperature and water immersion, and can be applied to the environment of the fume exhaust hood.

The cleaning work flow can be controlled manually or controlled by an intelligent programming controller to be started, and the cleaning period and the cleaning time are controlled according to a preset program. The steam cleaning and the light cleaning have wide applicability, and the electric heating cleaning is a cleaning mode which is set for cleaning graphite line stains of the graphite gill cleaning device. The 3 cleaning modes can be matched for use, and generally, steam cleaning is carried out firstly, and then light cleaning and electric heating decontamination are carried out. Realize the front end purification of the smoke exhaust system, and eliminate the dirty oil accumulated in the smoke exhaust hood and the air duct. The problems of time consuming and labor consuming cleaning and high cost are solved.

The fire-proof device of the fume-exhausting hood is composed of an electric air valve temperature control switch controlled by an intelligent programming controller, an electric air valve, an electromagnetic valve of a water supply pipe and steam nozzles with a plurality of spraying angles facing to the air inlet graphite gill air inlet. Two complementary intelligent connection modes are provided, so that the functions of fire prevention and extinguishment are achieved.

The electric air valve is characterized in that a normally open temperature control switch is arranged in an air opening of the electric air valve and is connected with a power supply of the electric air valve and a water supply pipe electromagnetic valve, the temperature of air flow passing through the air opening of the air valve is detected at any time, when the temperature of high-temperature air flow reaches a control upper limit, the normally open temperature control switch is started, the power supply of the electric air valve and the water supply pipe electromagnetic valve is connected, the electric air valve of an air inlet is closed, the water supply pipe electromagnetic valve is opened, water flow of the water supply pipe sprays water mist from a steam nozzle to air inlet graphite gill, open fire spreading is blocked, and the temperature is reduced and extinguishment is performed.

When the intelligent programming controller collects the starting signal of the temperature control switch, the fireproof working flow is started, the variable frequency fan and the high-voltage electrostatic power supply are closed, the air inlet electric air valve and the temperature control switch are closed, the high-temperature air flow or the fire source is cut off, the air is cut off, and the open fire combustion is prevented from spreading. Opening an electromagnetic valve of a water supply pipe, enabling water of the water supply pipe to flow through an adjusting water valve, the electromagnetic valve, the instant heating type steam generator and the steam nozzle, spraying water mist to an air inlet of the air inlet graphite gill, preventing open fire from spreading and burning, and cooling and extinguishing fire. When the water mist is sprayed into the purifying channel, the temperature is reduced, the fire is extinguished, the temperature is reduced, the temperature control switch is restored to the closed state, the intelligent programming controller detects the sampling signal of the temperature control switch, the electromagnetic valve of the water supply pipe is controlled to be closed, and the water mist spraying is stopped. And the intelligent programming controller controls the oil fume purifying equipment and the electric air valve to restore the working state.

The intelligent fireproof cleaning device of the fume exhaust hood can be controlled by an intelligent programming controller or manually. The electric air valve, the temperature control switch, the high-voltage electrostatic power supply, the power supply and control circuit, the exhaust variable-frequency fan and the graphite gill purifying device of the fireproof cleaning device of the intelligent smoke exhaust hood are all connected with the transmission circuit of the programming controller to form an intelligent smoke exhaust ventilation control system. According to the type of smoke and the amount of smoke of the treatment purified gas, the cycle and time of steam cleaning and heating cleaning and decontamination of the electric heating switch of the purifying channel are respectively controlled. The electric air valve temperature control switch can also be directly connected with an electric air valve motor and an electromagnetic valve power supply to control the electric air valve and the electromagnetic valve of the corresponding purifying channel, so as to realize an automatic fireproof function. The graphite wire has the characteristics of high temperature resistance and flame retardance, can be heated at high temperature, can recover the adsorption capacity and the conductivity of the graphite wire, can be reused, and can not form secondary pollution.

Compared with the prior art, the invention has the following advantages:

the intelligent fireproof cleaning device for the fume exhaust hood is different from the structure and the method of the existing fireproof fire-extinguishing technology, a temperature control switch is arranged in an electric air valve, the intelligent fireproof cleaning device has the fireproof effect of preventing open fire from passing, the electric air valve is automatically closed through an intelligent programming controller, water mist is sprayed to air inlet graphite gills, high-temperature air flow is blocked or a fire source is cut off, and the automatic fireproof fire-extinguishing function is realized. Aiming at the fire cause of the kitchen range and the fire spreading prevention way, the precision is stronger, the fireproof effect is improved, the facility structure is simplified, and the cost is reduced.

The intelligent fireproof cleaning device for the fume exhaust hood is provided with a high-temperature steam heating cleaning mode, an ultraviolet light cleaning mode and an electric heating cleaning mode, various adhered pollutants are regularly removed, the adsorption capacity and the conductivity of graphite wires are recovered, and the purification efficiency is improved. The fume graphite gill purifying device can be manually or intelligently cleaned at any time, and meanwhile, the inside of the fume exhaust hood is cleaned, so that the complex operation caused by manual cleaning is reduced. Is convenient for repeated regeneration and utilization, is simple and convenient to clean and maintain, and has no secondary pollution.

The intelligent fireproof cleaning device for the fume exhaust hood has the advantages of simple facility structure and parts, simplicity and reliability, simplicity in maintenance and convenience in implementation of intelligent control.

The fume exhaust hood combines with the actual sewage discharge requirement of the fireproof cleaning device, is provided with a diversion trench, a sewage discharge outlet, a sewage discharge pipe, a sewage discharge valve and other matched designs, and is designed into a condensed sump oil and sewage panel stubble receiving structure for interception, and the panel is fully led into the fume exhaust hood, so that the condensed and cleaned sump oil and sewage can flow into the fume exhaust hood diversion trench and the oil receiving tank, the maintenance and cleaning work is reduced, and the maintenance cost is reduced.

The fireproof cleaning device is combined with the fume exhaust hood, so that the cost and the refreshing maintenance cost are greatly reduced, and the fireproof cleaning device has universal applicability.

Drawings

Fig. 1 is a schematic side cross-sectional view of an example of the installation of the fire-resistant hood cleaning device of the present invention in a hood.

Fig. 2 is a schematic elevational cross-sectional view of an example of an installation of the fire-resistant extractor hood cleaning device of fig. 1 within a hood.

Fig. 3 is a schematic top view cross-section of an air inlet graphite gill of the smoke exhaust hood fire protection cleaning device of fig. 1.

Fig. 4 is a schematic top view in cross-section of an air-out graphite gill of the fire-resistant hood cleaning device of fig. 1.

Fig. 5 is a schematic cross-sectional elevation view of an electrostatic screen of the fume extractor hood cleaning apparatus of fig. 1.

Z1. gas collecting hood, Z2. smoke collecting box, Z3. purifying channel, Z4. electric air valve, Z5 gas collecting hood, Z6. oil receiving tank, Z7. gas collecting hood panel, Z8. steam generator, Z9. temperature control switch, Z10 upper access panel, Z11 lower access panel, Z12 middle partition, Z13 exhaust main pipe, Z14 cable pipe, Z15 power supply control box, Z16 purifying channel partition, Z17 guide groove, Z18 blowdown valve, Z19 solenoid valve, Z20 regulating water valve, Z21 fixed angle bar, Z22 steam nozzle, Z23 steam pipe, Z25 intelligent programming controller, Z26 power supply, Z27 high voltage electrostatic power supply, Z28 negative pressure air suction port, Z29 unidirectional air valve, Z30 blowdown pipe, Z31 blowdown port,

D1. Graphite gill, D2. electrostatic screen cloth, D3, bar-shaped gill plate, D4. graphite gill wire, D5. net disc frame, D6. lower annular plate, D7. upper annular plate, D8. screw rod, D9. net wire net, D10, cable wire, D11, gasket, D12, socket, D13, insulating knob, D14, insulating plate, D15, pin hole, D16, wire, D17, cavity bottom, D18, cavity cover, D19, high temperature control switch, D20, ultraviolet lamp tube, D21, opening clamp.

Detailed Description

The invention will be further described with reference to examples shown in the drawings. Fig. 1 is a schematic side cross-sectional view of an example of the installation of the fire-resistant hood cleaning device of the present invention in a hood. Fig. 2 is a schematic elevational cross-sectional view of an example of an installation of the fire-resistant extractor hood cleaning device of fig. 1 within a hood.

The fire-proof cleaning device for the fume exhaust hood is combined with the specific structure in the fume exhaust hood. The technical scheme of the example shown in the drawing is that the smoke exhaust hood fireproof cleaning device is arranged in an intelligent graphite gill purifying smoke exhaust hood Z1, and the smoke exhaust hood is used for purifying oil smoke by the graphite gill purifying device. Each smoke-steam-generating kitchen ware device is provided with a purifying channel Z3 in the smoke exhaust hood, a smoke collecting box Z2 is formed by communicating spaces at the upper parts of the purifying channels, and the top plate of the smoke exhaust hood is directly communicated with an exhaust main pipe Z13. Each purifying channel is provided with an electric air valve Z4 and a graphite gill D1 purifying device which are communicated with the main air pipe. The fume exhaust hood is provided with a fume exhaust hood panel Z7, the outside of the forwardly inclined fume exhaust hood panel is provided with a fume storage hood Z5 extending forwards, the fume storage hood consists of a fume storage hood inclined plane top plate, a fume exhaust hood panel and a coaming, and the fume storage space of the fume storage hood is communicated with the fume exhaust hood, so that when a large amount of fume is suddenly generated, the fume which escapes from the fume exhaust hood is temporarily stored and lifted, and then is slowly sucked by a negative pressure air suction port Z28, sucked into a purification channel through a negative pressure short pipe and cannot overflow. The lower part of the gas storage cover coaming is provided with a U-shaped diversion trench Z17 and the U-shaped diversion trench Z17 of the side plate of the fume exhaust cover is connected with an oil receiving groove Z6 at the lower part of the fume exhaust cover, and the bottom of the oil receiving groove is provided with a blow-down valve Z18. The fume exhaust cover plate is fixedly connected with the fume exhaust cover side plate, the fume exhaust cover inclined plate is a 3-section panel, and the upper overhaul plate Z10, the lower overhaul plate Z11 and the electric air valve inclined plate are arranged on the fume exhaust cover side plate. The lower electric air valve inclined panel is parallel to the U-shaped diversion trench of the fume exhaust hood side plate, a cleaning U-shaped diversion trench interval is reserved, and the lower part of the electric air valve inclined panel is inserted into the oil receiving groove to be connected with the rear vertical plate. The upper overhaul plate, the lower overhaul plate and the electric air valve inclined plate of the smoke exhaust cover plate are combined with the length design of the smoke exhaust cover, the width of the smoke exhaust cover plate is generally equal to the width of 2 purifying channels, the height of the upper overhaul plate and the height of the lower overhaul plate correspond to the height of the air outlet graphite gills and the height of the air inlet graphite gills, the installation and the overhaul are convenient, the inclined angle of the electric air valve inclined plate is fixedly connected, the upper part of the 3 sections of plates is inserted into the lower part of the upper part of the electric air valve inclined plate to be connected, a small gap is reserved at the connected part, and the condensed liquid of the smoke exhaust cover plate flows into the connected gap along the plates by screws so as to prevent dripping.

The device which is opposite to each device for generating the smoke is provided with a purifying channel in the smoke exhaust hood, the lower part of the panel of the smoke exhaust hood which is opposite to the smoke source is provided with an electric air valve inclined panel, an air inlet of the purifying channel is arranged, the electric air valve is arranged on the inclined panel which is inclined forwards of the electric air valve through an air valve flange, and a temperature control switch Z9 is arranged in the middle of the air inlet of the electric air valve. The purifying channel is provided with a purifying channel partition Z16, the purifying channel is longitudinally and fixedly connected with a smoke discharging cover face plate and a smoke discharging cover rear vertical plate, the lower part of the purifying channel is propped against the electric air valve inclined plate, and the upper part of the purifying channel is fixedly sealed with a transverse middle partition Z12. The middle partition board is transversely sealed and connected with the two-sided purification channel partition board, the fume exhaust hood panel and the fume exhaust hood rear vertical plate through the fixed angle bars Z21 and screws, and the purification channel of the fume exhaust hood and the graphite gill purification device are divided into an upper part and a lower part. The graphite gill purification device is arranged at the center of the middle partition plate in the purification channel, and air flow channels are reserved between the graphite gill purification device and the four-sided wall plates of the purification channel, so that smooth circulation of air flow is ensured, and circulation resistance is reduced. The graphite gill purifying device is divided into an air inlet graphite gill and an air outlet graphite gill, the air inlet graphite gill is fixed at the lower part of the middle partition board, the air outlet graphite gill is fixed at the upper part of the middle partition board, and a ventilation opening is reserved on the middle partition board and is communicated with the two graphite gill purifying cavities. The upper part of the middle partition plate is provided with a plurality of communicating spaces of the purifying channels, the flow cross section area is increased, a smoke collecting box is formed, and the top plate of the smoke exhaust cover is directly communicated with the main air exhaust pipe. Each purifying channel is provided with an electric air valve, and air flows through an air inlet graphite gill, an air outlet graphite gill, a smoke collecting box and an air exhaust main pipe in the purifying channels to be led to a smoke exhaust fan. A power supply control box Z15 is arranged on a front panel of the gas storage cover, which extends forwards, an intelligent programming controller Z25, a high-voltage electrostatic power supply Z27 and a power supply Z26 are arranged in the power supply control box, and a control switch such as a steam cleaning switch, an electric heating switch, a high-temperature heating switch and a system operation display screen are arranged on the power supply control box panel.

The upper part of the lower access plate in the middle of the purification channel is provided with a negative pressure air suction port, and a negative pressure short pipe is arranged in the lower access plate to be communicated with the purification channel. A one-way air valve Z29 is arranged in the negative pressure short pipe, is subjected to negative pressure of the fan, is opened, and is closed when the fan is shut down, so that steam overflows when the steam cleans graphite gills in the fume exhaust hood. The gas-storage cover of the fume-exhausting cover has a gas-storage space with the same length as the fume-exhausting cover, and can contain the escaping fume of the whole fume-exhausting cover. The negative pressure air suction port is arranged in the air storage cover opening, and the negative pressure of the fan intercepts and absorbs the escaping smoke through the negative pressure short pipe. The cross section area of the negative pressure air suction openings is very small and is only a few tenth of the flow cross section area of the purification channel, and the air exhaust effect of the electric air valve air opening cannot be affected. The sucked smoke is purified and discharged out of the smoke exhaust hood through the graphite gill purifying device. Part of the sucked smoke passes through the graphite gill purifying device without a high-voltage electrostatic field, and as the flow is very small and the flow speed is very low, the graphite net wires of the graphite gill purifying device have adsorption capacity and can also be used for interception, adsorption and purification.

The graphite gill purifying device consists of a high-voltage electrostatic field between the graphite gill D1 and an electrostatic screen D2. According to the purification channel inner structure graphite gill purifier, the graphite gill purifier is arranged as an air inlet graphite gill purifier communicated with an air outlet graphite gill purifier, two purification cavities are surrounded into a barrel shape by the graphite gill and an electrostatic screen, a cavity bottom D17 is arranged on the air inlet graphite gill, and a slope drain outlet Z31 is arranged at the cavity bottom and is led to an oil receiving groove through a drain pipe Z30. The air inlet graphite gill and the air outlet graphite gill are provided with barrel-shaped graphite gills, the barrel-shaped graphite gills are provided with upper and lower annular plates D6 and D7 with the same size, the upper and lower annular plates are fixed on a middle partition plate Z12 through insulating porcelain posts D13 and insulating plates D14, the flow area between the upper and lower annular plates and the four sides of the air inlet graphite gill is reserved on the middle partition plate and communicated with the air outlet graphite gill, the air outlet graphite gill is provided with a cavity cover D18, the graphite gills of the air inlet graphite gill and the air outlet graphite gill and the electrostatic screen are arranged along the direction of air flow, the air flow enters from the graphite gills, and the air flow vertically passes through the electrostatic screen along the direction of the air flow. All air flows pass through the graphite gills of the air inlet graphite gills and the air outlet graphite gills and the electrostatic screen.

The four-side electrostatic screen mesh of the air inlet graphite gill is arranged in the air inlet graphite gill, and a circulating air port between the four-side electrostatic screen mesh and the air outlet graphite gill is reserved on the middle partition plate and communicated with the air outlet graphite gill. Four sides electrostatic screens are arranged on the periphery of the air-out graphite gill, and the cavity cover is fixedly connected with the four sides electrostatic screens. The graphite gills of the air inlet and the air outlet and the electrostatic screen are arranged along the direction of the air flow, the air flow enters from the graphite gills, the graphite gill line is along the direction of the air flow, and the air flow vertically passes through the electrostatic screen. The graphite gill is connected with the positive electrode of the high-voltage electrostatic power supply, the electrostatic screen is connected with the negative electrode of the high-voltage electrostatic power supply Z27, and the graphite gill line extends to the electrostatic screen to leave equal electric field gaps.

The graphite gill imitates the structure that the gill bow of the fish is fully distributed with gill wires along the water flow direction. The strip-shaped gill plate D3 is made of a metal plate, the graphite wires are made of graphite wires, a waist-shaped opening is uniformly formed in one air inlet side of the strip-shaped gill plate, a plurality of equal-length graphite gill wires are fixedly wound in the waist-shaped opening, and the strip-shaped gill plates are uniformly fixed on one air inlet side between the upper annular fixed ring plate and the lower annular fixed ring plate of the graphite gill. And a waist-shaped hole which is vertically symmetrical is uniformly formed in one surface of the air inlet between the upper annular plate and the lower annular plate of the air inlet graphite gill, shaft plates are arranged at two ends of one air inlet side of the strip-shaped gill plate, the height of each shaft plate is equal to the thickness of each annular plate, and the shaft plates are inserted into the waist-shaped holes of the upper annular plate and the lower annular plate and are fixed. A waist-shaped opening is uniformly formed on the air inlet side of the strip-shaped gill plate, a plurality of equal-length graphite gill wires D4 are wound in the waist-shaped opening, and the graphite gill wires are clamped and fixed by an opening clamp D21 on the air inlet side of the strip-shaped gill plate. The strip gill plate is uniformly fixed on the outer edge of the air inlet surface between the upper annular ring plate and the lower annular ring plate of the graphite gill. The opening clamp is equal to the distance between the upper annular plate and the lower annular plate, one side pressed by the metal strip is provided with an arc, the diameter of the arc of the opening clamp is larger than the diameter of the graphite lines added on the thickness of the strip-shaped gill plate, the lengths of the two sides of the opening clamp exceed the waist-shaped opening length of the strip-shaped gill plate, and the arc which is wound outwards is arranged, so that the strip-shaped gill plate is convenient to insert into the opening clamp to clamp and fix the graphite lines. The strip-shaped gill plate and the opening clamp are respectively provided with a pin hole D15 at two ends, the opening clamp clamps the strip-shaped gill plate, and the strip-shaped gill plate and the opening clamp are inserted into the connecting steel wire D16 for fixation. The parallel strip gill plates and the annular plates are uniformly distributed between the upper annular plate and the lower annular plate, the edge distances of the strip gill plates and the annular plates are equal, the lengths of the strip gill plates wound into a plurality of graphite gill lines are equal, and the distances between the graphite gill lines of the strip gill plates extending to the electrostatic screen are equal. The parallel strip gill plates are uniformly fixed on one side of the air inlet between the upper annular plate and the lower annular plate, namely uniformly fixed on one side of the outer edge of the air inlet graphite gill and uniformly fixed on one side of the inner edge of the air outlet graphite gill. The upper annular plate of the air inlet graphite gill is fixed with the lower part of the middle partition plate through the insulating porcelain column and the insulating plate, and the lower annular plate is fixedly connected with the cavity bottom through the insulating porcelain column and the insulating plate. The lower annular plate of the air-out graphite gill is fixed with the upper part of the middle partition plate through the insulating porcelain column and the insulating plate, and the upper annular plate is fixed with the air-out graphite gill cavity cover through the insulating porcelain column and the insulating plate.

The electrostatic screen D2 is characterized in that a plurality of layers of same net wire strip nets D9 are arranged in the inner flow vent of the rectangular right-angle frame, the same net wire strip nets are installed on the same flow section in a closed parallel mode, four corners of each layer of net wire strip net are isolated and insulated by an insulating gasket D11, and electric field insulation distance is guaranteed. Two ends of the net line net frame are respectively provided with 2 symmetrical insulating mounting holes, the two symmetrical insulating mounting holes are fixed on screw rods D8 at two ends in the rectangular net disc frame, and the multi-layer net line net and the insulating gaskets are fixed in the rectangular net disc frame by nuts. The insulating strip frame of the wire mesh is symmetrically provided with a plurality of fixed insulating cylinders D13, graphite wires are wound on a plane in parallel by using one graphite wire, and the parallel graphite wires are not contacted with each other and are fixed with the insulating cylinders. The graphite lines of the multi-layer net lines are parallel and staggered at intervals, so that the probability of blocking collision pollutants is increased. Each layer of graphite wire net is provided with a plurality of wire net strip nets on the same flow section, the graphite wire nets of the multi-layer wire net strip nets keep a flow distance, each layer of wire net strip nets are connected with a porous socket D12 of the electrostatic screen through a cable D10 and an insulating wire tube in an insulating strip frame, the multi-layer wire net strip nets are connected with a high-voltage electrostatic power supply Z27 through the porous socket, and the graphite wires of the wire net strip nets are connected with a power supply Z26 in series. The polluted air flow passes through the strip-shaped gill plates and the radial graphite gill lines, and polluted particles are adsorbed on the graphite gill lines or are charged by the electric field of the graphite gill lines and flow to the electric field of the electrostatic screen.

The graphite fiber is a high-performance carbon material, has excellent performances of low density, high specific strength, high specific modulus, low thermal expansion coefficient, heat conduction, electric conduction, high temperature resistance, flame retardance, corrosion resistance, fatigue resistance, abrasion resistance, easy cleaning and maintenance, good flexibility, convenient winding, convenient processing and the like compared with a common metal wire, and has a special three-dimensional ordered graphite layered structure, so that the graphite fiber has excellent mechanical, electrical and adsorption properties, has special hydrophobic and oleophilic properties, and can effectively adsorb pollutants such as dust, VOC, bacterial virus, oil fume, particulate matters and the like.

The automatic cleaning of the fume exhaust hood cleaning device has 3 modes: steam cleaning: a steam nozzle Z22 for cleaning dirty oil is arranged in the fume exhaust hood and is in sealing connection with the instant heating type steam generator Z8 and the water supply pipe electromagnetic valve Z19, and the fume purifying device and the inside of the fume exhaust hood are cleaned by steam. And (3) electric heating and cleaning: the graphite wires are used for conducting heating, dirty oil stains on the graphite wires can be removed, and a temperature control switch and a high-temperature control switch are arranged in the graphite gill purifying cavity and are connected with a heating dirt removing switch, a high-temperature control switch and a power supply of a control box panel. And controlling the conductive heating temperature of the graphite wire, and removing dirty oil stains on the graphite wire. Optical cleaning: an ultraviolet lamp tube is arranged in the center of the purifying device and is parallel to the purifying device, so that ultraviolet light irradiates the purifying device, and pollutants are decomposed into carbon dioxide and water vapor by utilizing the strong irradiation energy of ultraviolet light and the photosensitive effect of hydrocarbon on strong absorption capacity of ultraviolet light, so that adhered organic pollutants are removed from the surface of the purifying device. The steam cleaning and the light cleaning have wide applicability, and the electric heating cleaning is a cleaning mode which is set for cleaning graphite line stains of the graphite gill cleaning device. The 3 cleaning modes can be matched for use, and generally, steam cleaning is carried out firstly, and then light cleaning and electric heating decontamination are carried out.

Steam nozzles are uniformly distributed at the lower part of the air inlet graphite gill, the jet angle of the steam nozzles faces the air inlet of the air inlet graphite gill and is in sealing connection with a steam pipe Z23 of the instant heating type steam generator, and a water supply pipe of the steam generator is fixedly connected with a main water pipe through a regulating water valve Z20 and an electromagnetic valve Z19. The method comprises the steps of starting a steam cleaning work flow, closing a variable frequency fan, closing an air inlet electric air valve, closing a high-voltage electrostatic power supply and a temperature control switch power supply, starting an electromagnetic valve of a power supply and a water supply pipe of an instant heating type steam generator, adjusting water flow through an adjusting water valve, entering the instant heating type steam generator, immediately changing into high-temperature water vapor, spraying the high-temperature vapor to an air inlet graphite gill through a steam pipe nozzle, heating and cleaning graphite net wires of the graphite gill and an electrostatic screen, filling high-temperature vapor in a purifying channel, heating by the high-temperature vapor, and enabling dirty oil stains to melt and flow, and removing pollutants adhered on the graphite wires by the high-temperature vapor and condensed hot water. The cleaned dirt and condensed water flow to a drain outlet Z31 arranged at the bottom of the air inlet graphite gill cavity, a drain pipe Z30 is arranged at the lower part of the drain outlet, and flows to an oil receiving groove at the lower part of the fume exhaust hood, and waste liquid is discharged through a drain valve. After steam cleaning, the variable frequency fan and the electric air valve are controlled to be opened, and condensed water and moisture of all components in the fume exhaust hood are dried.

After the graphite wires are cleaned by heating with steam for electric heating, the graphite wires are heated to 290-300 ℃ to recover the adsorption capacity and the electric conductivity of the graphite wires. The upper part of the air inlet graphite gill, which is close to the electrostatic screen, is fixed on a middle partition board Z12, and a 180-degree temperature control switch Z9 and a high-temperature control switch D19 are arranged and are connected with a heating decontamination switch, a high-temperature heating switch and a power supply of a power supply control box panel. The 180-degree temperature control switch and the high-temperature control switch are normally closed switches, the heating decontamination switch is opened, the electric air valve is automatically closed, the air flow is cut off, the variable-frequency fan, the high-voltage electrostatic power supply and the electric air valve temperature control switch power supply are closed, and the heating effect and safety are ensured. The power supply supplies power to the multi-layer electrostatic screen graphite wires connected in series through the porous sockets through the 180-degree temperature control switch, the temperature reaches 180 degrees, the temperature control switch is started to disconnect the power supply, and the power supply is stopped. When the temperature is reduced, the temperature control switch is started to continue to be powered on and heated. The high-temperature control switch is a normally closed switch to start the high-temperature heating switch, the power supply supplies power to the graphite wires of the multi-layer electrostatic screen mesh connected in series through the porous socket through the high-temperature control switch to heat, the temperature reaches 300 ℃, and the high-temperature control switch is started to disconnect the power supply to stop power. When the temperature is reduced and the high-temperature control switch is started, the electric heating is continued. The graphite wires are heated by the conductive heating effect, the graphite wires of the graphite gills are baked and heated, and the graphite wires of the electrostatic screen mesh and dirty oil stains bonded by the graphite gills are melted and flow by the thermal effect, so that main dirty oil stains are removed, and the dirty oil stains drop to the oil receiving groove. When the graphite wire is heated to 300 ℃, the temperature is still lower than the ignition point of the dirty oil, and the dirty oil stains are roasted at high temperature, so that the stains of the graphite wire are oxidized, and the stains of the graphite wire are removed. Restoring the adsorption capacity and conductivity of graphite wires. And the water is recycled, so that secondary pollution is avoided.

Ultraviolet lamps D20 are uniformly distributed in the central position between the upper annular plate and the lower annular plate of the air inlet graphite gill and the air outlet graphite gill of the graphite gill purifying device in an ultraviolet light cleaning mode and are parallel to graphite lines of the graphite gill purifying device, so that ultraviolet light irradiates the graphite lines of the graphite gill purifying device, pollutants are decomposed into carbon dioxide and water vapor by utilizing the strong irradiation energy of ultraviolet light and the photosensitive effect of hydrocarbon on the strong absorption capacity of the ultraviolet light, and adhered organic pollutants are removed from the surfaces of the graphite lines of the purifying device. The single-end 4-jack ultraviolet lamp tube is connected with the socket of the cavity cover plate through the seal of the protective silica gel sleeve, and the lower end of the ultraviolet lamp tube is fixedly connected with the cavity bottom plate. The ultraviolet lamp tube is provided with a ceramic lamp holder on the upper part and the lower part, is made of explosion-proof quartz glass, is resistant to high temperature and water immersion, and can be applied to the environment of the fume exhaust hood.

The fire-proof device of the fume-exhausting hood consists of an electric air valve temperature control switch Z9 controlled by an intelligent programming controller, an electric air valve, an electromagnetic valve of a water supply pipe and steam nozzles with a plurality of spray angles facing to an air inlet graphite gill air inlet. Two complementary intelligent connection modes are provided, so that the functions of fire prevention and extinguishment are achieved.

When the intelligent programming controller collects the starting signal of the temperature control switch of the electric air valve, the fireproof working flow is started, the variable frequency fan and the high-voltage electrostatic power supply are closed, the electric air valve of the air inlet and the temperature control switch are closed, the high-temperature air flow or the fire source is cut off, the air is cut off, and the open flame combustion is prevented from spreading. Opening an electromagnetic valve of a water supply pipe, enabling water of the water supply pipe to flow through an adjusting water valve, the electromagnetic valve, the instant heating type steam generator and the steam nozzle, spraying water mist to an air inlet of the air inlet graphite gill, preventing open fire from spreading and burning, and cooling and extinguishing fire. When the water mist is sprayed into the purifying channel, the temperature is reduced, the fire is extinguished, the temperature is reduced, the temperature control switch is restored to the closed state, the intelligent programming controller detects the sampling signal of the temperature control switch, the electromagnetic valve of the water supply pipe is controlled to be closed, and the water mist spraying is stopped. And the intelligent programming controller controls the oil fume purifying equipment and the electric air valve to restore the working state.

The intelligent fireproof cleaning device of the fume exhaust hood can be controlled by a programmed controller or manually. The electric air valve, the temperature control switch, the high-voltage electrostatic power supply, the power supply and control circuit, the exhaust variable-frequency fan and the graphite gill purifying device of the fireproof cleaning device of the intelligent smoke exhaust hood are all connected with the transmission circuit of the programming controller to form an intelligent smoke exhaust ventilation control system. According to the type of smoke and the amount of smoke of the treatment purified gas, the cycle and time of steam cleaning and heating cleaning and decontamination of the electric heating switch of the purifying channel are respectively controlled. The electric air valve temperature control switch can also be directly connected with an electric air valve motor and an electromagnetic valve power supply to control the electric air valve and the electromagnetic valve of the corresponding purifying channel, so as to realize an automatic fireproof function. The graphite wire has the characteristics of high temperature resistance and flame retardance, can be heated at high temperature, can recover the adsorption capacity and the conductivity of the graphite wire, can be reused, and can not form secondary pollution.

Claims

1. An intelligent fireproof cleaning device for an exhaust hood is characterized in that a purification channel is arranged in the exhaust hood, and each purification channel is internally provided with a purification device, a fireproof device and a cleaning device which are connected with an intelligent programming controller: an electric air valve is arranged on a front inclined panel of the fume exhaust hood, a normally open temperature control switch is arranged in an air port and is connected with a power supply of the electric air valve and a water supply pipe electromagnetic valve, graphite wires of a multi-layer electrostatic screen are connected with a power supply through series connection, the temperature control switch is frequently closed again, steam nozzles which are in sealing connection with a steam generator are uniformly distributed at an air inlet of a purifying device and are fixedly connected with the water supply pipe through the electromagnetic valve, and ultraviolet lamp tubes are uniformly distributed at the center of the purifying device and are connected with the power supply.

2. The intelligent fire protection cleaning apparatus for a fume extractor hood according to claim 1, wherein: an electric air valve is arranged on a front inclined panel of the fume exhaust hood purification channel, a normally open temperature control switch is arranged in an air inlet of the electric air valve, and the normally open temperature control switch is connected with a motor power supply of the electric air valve and a solenoid valve power supply for controlling a water supply pipe.

3. The intelligent fire protection cleaning apparatus for a fume extractor hood according to claim 1, wherein: and steam nozzles facing the air inlet are uniformly distributed at the air inlet of the purifying device in the fume exhaust hood and are in sealing connection with the steam generator and the electromagnetic valve.

4. The intelligent fire protection cleaning apparatus for a fume extractor hood according to claim 1, wherein: ultraviolet lamp tubes parallel to the purifying device are uniformly distributed at the center of the purifying device and connected with a power supply.

5. The intelligent fire protection cleaning apparatus for a fume extractor hood according to claim 1, wherein: a normally closed temperature control switch and a high-temperature normally closed temperature control switch are arranged in the smoke exhaust hood close to the electrostatic screen and are connected in series with a power supply.

6. The intelligent fire protection cleaning apparatus for a fume extractor hood according to claim 1, wherein: a plurality of purifying channels separated by purifying channel separating boards are arranged corresponding to the smoke generating equipment, and a purifying device and a fireproof cleaning device are arranged in each purifying channel.

7. The intelligent fire protection cleaning apparatus for a fume extractor hood according to claim 1, wherein: the graphite wires of the multi-layer graphite wire mesh of the electrostatic screen are connected in series and are connected with a power supply in series through a temperature control switch.

8. The intelligent fire protection cleaning apparatus for a fume extractor hood according to claim 1, wherein: the graphite lines of the multi-layered screen of the electrostatic screen are insulated parallel to each other.