130results about How to "Improve smoke extraction efficiency" patented technology

The invention provides a centralized frequency conversion smoke discharging control method and device applied to a centralized smoke discharging system. The centralized smoke discharging system comprises a public flue. Each kitchen in each floor is provided with a check valve, a connecting pipe and a kitchen ventilator, all of which are connected with the public flue. Firstly, the floor where thekitchen ventilators are started is obtained, and the outlet air volume and the outlet air pressure of the public flue are obtained according to the number of the started kitchen ventilators and the rated air volume of each started kitchen ventilator; according to the outlet air volume, the outlet air pressure and the resistance coefficient, the work air pressure of the started kitchen ventilatorsis sequentially calculated according to the sequence from top to bottom; according to the work air pressure of each started kitchen ventilator, the target running frequency of the started kitchen ventilator is calculated; and the target running frequency of each started kitchen ventilator is sent to the corresponding started kitchen ventilator, and accordingly the corresponding started kitchen ventilator works according to the target running frequency. According to the centralized frequency conversion smoke discharging control method and device, the smoke discharging flow can be controlled inan oriented manner, balanced distribution is achieved, accordingly, the smoke discharging pressure of the kitchens is relieved, the integral smoke discharging efficiency of the floor building is improved, the kitchen ventilators in all floors are controlled to conduct frequency conversion running in order, and high efficiency and energy saving are achieved.

The invention relates to the technical field of fire disaster ventilation and smoke exhaust, in particular to a fire disaster ventilation and smoke exhaust method for an underground station platform adopting subway full-closed station platform doors. The method comprises the steps that one of an upgoing side tunnel and a down side tunnel is selected as an auxiliary smoke exhaust tunnel; a row of smoke exhaust valves is arranged above the platform doors; the smoke exhaust valves on the side of the auxiliary smoke exhaust tunnel are opened for smoke exhaust; upgoing side interval tunnel fans anddown side interval tunnel fans are started for smoke exhaust; station tunnel heat exhaust fans are started for smoke exhaust; and station large system fans are started for smoke exhaust. According tothe fire disaster ventilation and smoke exhaust method for the underground station platform adopting the subway full-closed station platform doors, smoke generated during a fire disaster can be exhausted in time, the smoke exhaust efficiency is effectively improved, and the safety of personnel is guaranteed.

The invention relates to a sectional type tunnel smoke exhaust system by water curtain separation, comprising a smoke exhaust duct, a smoke exhaust vent and an air valve. The smoke exhaust duct is positioned on the top or the side wall of a tunnel; the smoke exhaust vent is communicated with the smoke exhaust duct; the air valve is installed on the smoke exhaust vent; and the top or the side wall of the tunnel is provided with devices used for forming fire control water curtains. The invention also provides a smoke exhaust method which uses the sectional type tunnel smoke exhaust system. The smoke exhaust method comprises the following steps of: starting the devices which are used for forming the fire control water curtains and positioned on both sides of a fire source to form the water curtains and separating smoke gas generated by the fire source between the two water curtains; and starting the smoke exhaust vent which is positioned near the fire source to exhaust smoke. The invention has the advantages of optimizing the smoke exhaust effect of a highway tunnel, improving the smoke exhaust efficiency under the condition of the same smoke exhaust configuration, reducing the range of smoke gas influence, effectively controlling the diffusion of smoke gas within 200 meters, greatly reducing the heat radiation near the fire source and supplying better safety space for people escape and fire control.

The invention discloses a railway rescue station with smoke prevention and exhaust and personnel emergency evacuation functions. The railway rescue station is divided into an upper-layer structure, amiddle-layer structure and a lower-layer structure; the upper layer of the station is a smoke exhaust channel; the middle layer of the station is a rescue station body; the lower layer of the stationis an evacuation channel; a tunnel in the longitudinal range of the railway rescue station is composed of an upper-layer train tracking area and a lower-layer evacuation layer, and smoke exhaust portsare evenly formed in the upper portion of the inner side of a track of the upper-layer train tracking area; each smoke exhaust port is internally provided with a remote control smoke exhaust air valve; each smoke exhaust port is provided with a fire smoke detection module; the opposite sides of each smoke exhaust port are provided with directional jet fans; the upper portion of the train trackingarea is provided with mobile jet fan groups and movable fire extinguishing bins separately; escape staircases are arranged between the upper-layer train tracking area and the lower-layer evacuation layer. The railway rescue station mainly solves the problem that an evacuation platform cannot be arranged on a conventional rescue station for two two-hole single-line tunnel with short transverse distance, and the efficiency of smoke exhaust and personnel evacuation is improved.

The invention discloses a flue check valve and a flue system with the same. The flue check valve comprises a valve body, a non-return structure and a distributing fin, wherein the valve body is provided with a smoke channel and the smoke channel is provided with a smoke inlet and a smoke outlet; the non-return structure is arranged on the valve body and only allows fluid inside the smoke channel to circulate in one way from the smoke inlet to the smoke outlet; and the distributing fin is rotationally installed on the valve body so as to adjust the flowing-out angle of the fluid from the smokeoutlet. According to the flue check valve of the embodiment of the invention, the backward flowing prevention and fireproof functions are achieved, the smoke discharge angle is adjusted according to the smoke discharge piezoresistance distribution of floors, and accordingly mutual influence on smoke discharge at different floors is reduced, and the smoke discharge efficiency is improved.

The invention relates to the field of smoke treatment devices, in particular to a dehydrating tower provided with an anti-blocking plug. The dewatering tower comprises a fixed sleeve, a tower body, adehydrating structure, a smoke discharging structure, a sealing structure, a fixing structure, an anti-blocking structure and an anti-explosion structure. Since the dehydrating structure is arranged inside the tower body, smoke with high humidity and low temperature can be subjected to inflow dehydrating treatment, moisture and harmful tiny substances in the smoke can be removed, and the smoke discharging quality is improved beneficially; by arranging the smoke discharging structure outside the tower body, natural wind energy can be effectively utilized, the smoke discharging efficiency of a smoke outlet pipeline is improved, fuel combustion is more sufficient, and therefore waste of resources is reduced; during work of the smoke discharging structure, the anti-blocking structure can be driven to work simultaneously; through the arrangement of the anti-blocking structure, soot which adheres to the side wall inside the tower body can be cleared up in time; and the work of the anti-blocking structure can perform reaction on the smoke discharging structure, so that the working efficiency of the smoke discharging structure is higher.

Disclosed is an air supplementing and smoke control energy-saving system for a home building kitchen. A smoke exhaust way is connected with a smoke exhaust ventilator through a smoke exhaust branch pipe, and is arranged in an air supplementing way; the air supplementing way is connected with an electric valve in series connection with a smoke exhaust ventilator motor and a concave air supplementing box placed on a cooking bench through an air supplanting branch pipe; the sinking portion of the air supplementing box corresponds to an air exhaust cover of the smoke exhaust ventilator, and a cooking range is placed on the sinking portion; a rectangular-ambulatory-plane air supply opening is formed in the upper portion of the air supplementing box; the home building adopts the system, when the smoke exhaust ventilator runs, the kitchen is subject to air supplementing through the air supplementing way and the air supplementing box, and indoor air is not affected by supplemented air, and can be kept clean; during cooking in winter, outdoor cold air cannot intrude into the kitchen from the window and door gap, and indoor heat losses are small; cold air in the air supplementing way can exchange heat with the high-temperature smoke in the smoke exhaust way, and the air supplementing temperature is improved; an air curtain is formed on the periphery of the cooking range by the supplemented air, lampblack diffusion is prevented, the smoke exhaust efficiency of the smoke exhaust ventilator is improved, and gas combustion is promoted.

The invention discloses a double-cavity range hood with an air curtain, and belongs to the technical field of kitchen appliance equipment. The double-cavity range hood comprises a smoke sucking cavityand an air curtain cavity isolated from each other; a smoke sucking impeller is arranged in the smoke sucking cavity; an air curtain impeller is arranged in the air curtain cavity; and the smoke sucking impeller and the air curtain impeller share one double-shaft motor. Lampblack is discharged through the smoke sucking impeller in the smoke sucking cavity, and external air is guided in through the air curtain impeller in the air curtain cavity to form an air curtain, so that smoke overflowing is effectively prevented, and the smoke discharge efficiency is improved; and the smoke sucking impeller and the air curtain impeller share one double-shaft motor, so that no additional motor is added, the energy is saved, the noise is reduced, and meanwhile, the cost is reduced.

A building public flue fume exhaust system comprises range hoods which are installed on different floors. An air outlet of each range hood communicates with a public flue through a corresponding fume pipe of the range hood. The building public flue fume exhaust system is characterized in that an air suction device which can outwards suck the gas in the flue is installed at the bottom of the public flue. The building public flue fume exhaust system further comprises a control system which can correspondingly control the air suction device according to the value of the starting ratio. The building public flue fume exhaust system has the advantages that the building public flue fume exhaust system can exhaust cooking fumes on the lower layers through the air suction device at the bottom of the flue, the pressure of the bottom of the flue is reduced, and therefore the fume exhaust capacity and the fume exhaust efficiency of the flue are improved, the problems that in the cooking peak time period, the fume exhaust operation of users on the lower layers is not smooth, the fumes return, and the odors spread are solved, and the usage experience of the users is improved. In addition, the control system can correspondingly control the working gear of the air suction device according to the value of the starting ratio, and therefore the intelligent control over the fume exhaust system is achieved, and the system can save more energy.

The invention discloses a filter screen of a range hood. The filter screen is characterized by comprising a plurality of ventilation surfaces which are arranged side by side from left to right, wherein each ventilation surface is a concave surface with high left and right sides and a low middle part; a plurality of meshes are formed in the two side surfaces of each ventilation surface; the concave part in the middle of each ventilation surface forms a drainage trough; the concave depth of each ventilation surface is gradually increased from the front end to the back end. The filter screen is provided with the plurality of ventilation surfaces with the high two sides and the low middle part side by side and the meshes are formed in inclined planes of the ventilation surfaces, so that the filter screen has a larger area for oil fume to pass through compared with a planar filter screen, and the exhaust efficiency is improved; besides, the oil fume can collide with the side surfaces of the ventilation surfaces for a plurality of times when passing through the filter screen, so that grease can be easily condensed on the ventilation surfaces and flow into an oil cup along the drainage troughs; moreover, because the oil fume collides with the filter screen for a plurality of times, the oil fume flow can be scattered, and then the rectifying effect of the oil fume passing through the filter screen is improved.

The invention discloses a kitchen air purification system. The kitchen air purification system comprises a fresh air inlet system, an exhaust system and a fresh air purification host, wherein the fresh air inlet system and the exhaust system are connected with the fresh air purification host, the exhaust system is connected with a kitchen ventilator, the exhaust system and the fresh air purification host form an exhaust gas and fume discharging channel, the fresh air inlet system achieves introduction of air through the fresh air purification host so that an air introduction channel can be formed, and an oxygen-rich supplementing system with a variable-air-volume adjusting tuyere is arranged in the fresh air inlet system. The kitchen air purification system has the beneficial effects thatthrough introduction of the fresh air purification system and unique structural design, the problems of poor air quality in a kitchen and interaction of indoor pollution and outdoor pollution caused by opening of a window are solved.

The invention relates to an integrated stove with a cooking device. The integrated stove comprises the cooking device with a cooking cavity and a stove, wherein the stove comprises a stove shell; thestove is arranged above the cooking device, and an exhaust layer with an exhaust inner cavity inside is arranged between the stove and the cooking device; a side exhaust opening communicating with theexhaust inner cavity of the exhaust layer is formed in the side face of the exhaust layer, and a gas inlet communicating with the exhaust inner cavity of the exhaust layer is further formed in the exhaust layer; and a first gas outlet is formed in the cooking cavity, and the first gas outlet communicates with the gas inlet through fluid. Compared with the prior art, according to the integrated stove with the cooking device, smoke in the cooking cavity can be exhausted from bottom to top and from the side face, so that interference of the smoke in the cooking cavity on a user and influences ofthe smoke on a cabinet are avoided, and the smoke exhaust efficiency can be improved.

The invention relates to the field of rail transit ventilation and smoke exhaust, and provides a fire ventilation and smoke exhaust system and method for separated island type subway underground station platform. A separated island type subway underground station comprises two platforms which are separated from each other and two station halls arranged above the two platforms, the two platforms communicate with the two station halls through channels respectively, tunnels are separated from the platforms through platform doors, and the two ends of each tunnel are connected with tunnel smoke exhaust subsystems respectively. A smoke exhaust valve is arranged above each platform door, each tunnel is connected with a heat exhaust subsystem, the platform and the station hall on each side share one set of air supply and smoke exhaust system, and each air supply and smoke exhaust system is used for supplying air to or exhausting smoke from a platform public area and a station hall public area.According to the separated island type subway underground station platform fire ventilation and smoke exhaust system, the smoke exhaust amount is increased by at least one time on the premise that the equipment purchase cost is not remarkably increased, and efficient smoke exhaust is achieved.

The invention relates to a limestone-gypsum process desulphurization apparatus. A technical key point is as follows: the limestone-gypsum process desulphurization apparatus comprises a limestone-gypsum bin, a desulphurization tower, a gypsum sedimentation tank and a chimney, wherein a desulphurization tank is arranged at the inner bottom of the desulphurization tower, two layers of defogging devices are arranged in the top of the desulphurization tower, three spraying layers are arranged below the defogging devices, each spraying layer comprises a spray nozzle and a spraying pipe, the spray nozzle is connected with the desulphurization tank by virtue of the spraying pipe, a circulating pump is arranged on one end, which is closed to the desulphurization tank, of the spraying pipe, the top of the desulphurization tank is connected with a serous fluid tank by virtue of a slurry inlet pipe, the slurry inlet pipe is provided with a slurry inlet pump, the serous fluid tank is communicated with the limestone bin which is arranged above the serous fluid tank by virtue of a powder inlet pipe, the bottom of the desulphurization tank is communicated with the gypsum sedimentation tank by virtue of a gypsum discharging pipe, the gypsum discharging pipe is provided with a gypsum slurry discharging pump, a smoke inlet and a smoke outlet are formed in the desulphurization tower, the smoke inlet is arranged below the spraying layers, the smoke outlet is disposed above the defogging devices, and the smoke outlet is communicated with the chimney by virtue of a smoke discharging pipe. The limestone-gypsum process desulphurization apparatus is high in desulphurization efficiency, thorough in desulphurization and low in sulfur dioxide concentration of the discharged smoke.

The invention relates to an energy-saving and environmentally-friendly rack mount of a cooker, which is characterized in that the surface of the cooker rack mount is provided with an embedded cooker mounting hole and the back of the cooker rack mount is provided with a backboard with a buckle groove. A right angle type or circular arc type buckle groove is arranged under the rack mount. The two sides of the rack mount are respectively put on the table top of a cupboard which is under the rack mount. An insulating air pipe is arranged under the surface and a cross flow cooling fan or a small air conditioner is arranged on the front. An insulating baffle and a flip embedded cover frame are mounted on the surface for facilitating cooking. The invention has the advantage that the installation is simple and convenient, and a fume extractor, the cooling fan, the small air conditioner and the cover frame, which are smoke and heat insulating, temperature reducing and convenient, can be broadly applied to the prior family cookers. The insulating baffle can effectively insulate the heat generated by the cooker from the indoor environment, reduce the surrounding temperature of the cooker, which is good to health, reduce the indoor cooling air consumption, save energy in summer and Improve the efficiency of a ventilator greatly. By using the invention, the kitchen environment can be cleaner and more comfortable.

The invention discloses an indoor air conditioning method. Based on the indoor air conditioning method comprising an exhaust fan, a fresh air fan and a circulating fan, the method comprises the following steps of acquiring state parameters of a range hood in an action space of air treatment equipment; and when the state parameters are in an opening state, controlling the exhaust fan to be started, controlling a bypass valve to be opened, and controlling the circulating fan to be started, wherein when the circulating fan is started and the bypass valve is opened, outdoor fresh air enters the space through a circulating air duct, and when the exhaust fan is started, indoor air is exhausted out of the outdoor environment through an exhaust duct. The invention further discloses an indoor air conditioning system and a computer readable storage medium. The indoor air conditioning method, the indoor air conditioning system and the computer readable storage medium aim to improve the smoke exhaust effect of the range hood during operation.

The invention discloses an intelligent control method and an intelligent control system for discharging oil fume. The intelligent control method for discharging the oil fume comprises the following steps: collecting the oil fume amount of an environment where a range hood is located and a wind pressure value in an oil fume well which is communicated with the range hood at regular times; calculating a wind power value that the range hood requires to work according to the oil fume amount and the wind pressure value which are collected; controlling a wind wheel of the range hood to reach a fit rotating speed according to the calculated wind power value. According to the intelligent control method and the intelligent control system for discharging the oil fume, disclosed by the invention, reasonable wind power level can be calculated according to the oil fume amount of the environment where the range hood is located and the wind pressure value in the oil fume well which is communicated with the range hood, and the rotating speed of the wind wheel can be adaptively regulated, so that the oil fume discharging efficiency can be increased.

The invention discloses an integrated stove with an oil pollution decomposition device and a method. The integrated stove with the oil pollution decomposition device comprises an integrated stove body, a smoke collecting cavity, a smoke exhaust pipe and an air outlet wind duct are arranged in the integrated stove body, a box body is arranged under the air outlet wind duct, and an anti-backflow pipe is arranged at the bottom of the smoke exhaust pipe. A mixing mechanism is arranged in the box body, a water delivery system is arranged on the side surface of the box body, a decomposition liquid storage mechanism is arranged above the air outlet wind duct, and a testing mechanism is arranged on the side surface of the box body. The method comprises the steps of the installation of the box bodyand the mixing mechanism, the installation of the anti-backflow pipe and an air outlet cover, the installation of the water delivery system, the installation of the decomposing liquid storage mechanism, the installation of the testing mechanism, the installation of a burner and a smoke guide plate and the trial operation of the integrated stove. According to the integrated stove with the oil pollution decomposition device and the method, through the design of the anti-backflow pipe, liquid in the box body can be prevented from being absorbed inversely while oil fume is discharged, the bottomend of the anti-backflow pipe is immersed in the liquid, the contact area between the adsorbed oil fume and the liquid can be increased, and the adsorption and decomposition efficiency of the oil fumein gas is improved.

The invention discloses a smoke exhausting device. The smoke exhausting device comprises a cover body and an airflow generating device, wherein the cover body comprises a smoke absorbing surface plate; a first jet flow port, a second jet flow port and a smoke absorbing channel are arranged at intervals on the smoke absorbing surface plate; the smoke absorbing channel is positioned between the first jet flow port and the second jet pot; a smooth curved surface is formed at an inlet side edge of the smoke absorbing channel; the jet flow outgoing direction of the first jet flow port and the jet flow outgoing direction of the second jet flow port both face the curved surface; the airflow generating device is used for inputting airflow into the cover body; the first jet flow port is used for converting the airflow into first jet flow and jetting to an inlet of the smoke absorbing channel; the second jet flow port is used for converting the airflow into second jet flow and jetting to the inlet of the smoke absorbing channel; the curved surface is used for turning the first jet flow and the second jet flow into the smoke absorbing channel in order to form a negative pressure area at the inlet of the smoke absorbing channel. Therefore, the smoke absorbing range of the smoke exhausting device can be expanded, and oil smoke is hardly outwards dispersed.

The invention discloses a fire control draught fan supercharging device which comprises a fire control draught fan, equal altitude blocks and a supercharging cover. A supporting frame is arranged at the lower end of a motor in the fire control draught fan, first connecting flanges are arranged at the two ends, a base plate is arranged at the lower end, the multiple equal altitude blocks are arranged at the lower end of the base plate, the air outlet end of the fire control draught fan is connected with the supercharging cover, the supercharging cover is provided with a conic supercharging taper pipe, the large diameter end of the supercharging taper pipe is provided with a flange, the supercharging taper pipe is internally provided with a taper hole, and the large diameter of the taper hole is communicated with an air outlet of the fire control draught fan in a butt joint manner. By means of the supercharging cover, flowing air output by the fire control draught fan can be compressed,supercharged and output, the air amount lift and kinetic energy of the fire control draught fan are greatly increased, and the quick cooling effect and the smoke discharging efficiency are improved.

The invention relates to the technical field of environmental protection, and particularly relates to a water spraying system and a waste gas treatment system. The water spray system comprises a lye tank, a metering pump, a spray water tank, a first water pump, a PH probe, a sprayer device, a tower body and a control device, wherein the lye tank, the metering pump and the spray water tank are sequentially connected; the water outlet of the spray water tank, the first pump, the water inlet of the tower body, the water outlet of the tower body and the water inlet of the spray water tank are communicated sequentially to form a first circulating system; the PH probe is arranged in the first circulating system; the sprayer device is connected with the water inlet of the tower body, and is arranged in the tower body; a smoke inlet of the tower body is formed in the lower side of the sprayer device, and a smoke outlet of the tower body is formed in the upper side of the sprayer device; and the PH probe, the control device and the metering pump are electrically connected sequentially. The water spraying system can be used for automatically adjusting the PH value of the solution in the water spraying system, so that equipment corrosion is reduced, and the service life of the equipment is prolonged.

The invention discloses a fly ash recovery device for an environmental-protection project. The fly ash recovery device comprises a smoke pipe, wherein a cylindrical box body is fixedly mounted in thesmoke pipe; the middles of the upper and lower end surfaces of the box body are both provided with first shaft holes; first vertical shafts are arranged in the first shaft holes; the first vertical shafts can be slid up and down along the first shaft holes; a cross rod is fixedly mounted in the smoke pipe; the middle of the bottom of the cross rod is fixedly provided with a vertical elastic telescopic rod; the lower end of a movable rod of the elastic telescopic rod is movably connected with a bearing at the upper ends of the first vertical shafts. The fly ash recovery device is ingenious in structure, is used for simultaneously providing power for the rise of flue gas and the pressurization of desulfurized slurry in a water inlet pipe through ingenious drive design, also has the functionof automatically controlling the rise speed of the flue gas, and can be used for effectively helping to remove smoke dust and sulfur dioxide in the glue gas; the fly ash recovery device is mounted inthe interior of a chimney, basically does not occupy other space, and is low in construction cost, and the fly ash recovery device has great help to ameliorate air quality after being popularized.

The invention relates to the field of oil fume exhaust equipment, in particular to environment-friendly oil fume exhaust equipment for a large kitchen. The equipment comprises an air bellow, a motor is fixed in the air bellow, the end of an output shaft end of the motor is fixedly connected with an impeller, the two sides of the air bellow are symmetrically fixed and communicate with exhaust barrels, and the ends, away from the air bellow, of the two exhaust barrels communicate with an oil fume exhaust header pipe. Filter screens are fixed to the inner walls of the two exhaust barrels, and a brushing mechanism used for cleaning the filter screens is arranged between the two exhaust barrels. A cleaning mechanism used for flushing the filter screens is arranged between the two exhaust barrels, and the brushing mechanism is in transmission connection with the cleaning mechanism. According to the environment-friendly oil fume exhaust equipment for the large kitchen, the oil fume exhaust efficiency is improved, the risk of complete shutdown of the equipment is reduced, the filter screens are prevented from being blocked, and therefore the efficient passing ability of the filter screens is always kept, and then the oil fume filtering effect and efficiency are improved.

The invention discloses a heating oil-collecting mesh hood of a range hood, comprising an oil-collecting mesh (7) and a heater mounted on the oil-collecting mesh (7). The heater comprises a heat-conducting plate, a heating block (4) and a heater binding post (6), wherein the heating block (4) is connected with the heater binding post (6), and the heat-conducting plate which is mounted on the oil-collecting mesh (7), is provided with a heat-insulating pad (2) and comprises an upper heat-conducting plate (3) and a lower heat-conducting plate (5); both heat-conducting plates are connected with the heating block (4) and mounted above the oil-collecting mesh (7); and the heating block (4) is wrapped by an insulation layer. Oil dirt stuck to the oil-collecting mesh hood is heated and liquefied before flowing to an oil-collecting cup so that oil is thoroughly cleaned and the non-cleaning effect is achieved.

The invention discloses an intelligent automatic monitoring, fire extinguishing and smoke exhausting device and method for a highway tunnel. The device for implementing the method comprises an infrared thermography temperature measurement module, a pipeline bracket, a self-smoke-exhausting corridor standard section and a self-smoke-exhausting corridor tunnel outer section. Based on the infrared thermography temperature measurement technology, the temperature of tires of a vehicle running in a tunnel and the temperature outside a compartment are measured, the vehicle with the tires on fire is positioned, and a fire extinguishing agent pipeline with a directional spray head and a self-smoke-discharging pipeline with a directional smoke discharging port are arranged in the tunnel; infrared thermography temperature measurement modules are arranged on the two sides of the inner wall of a tunnel structure at fixed intervals. A self-smoke-discharging corridor is arranged on the top of the inner wall of a tunnel in a full-length mode and led to the outside of the tunnel, directional smoke discharging ports are reserved in the bottom of the corridor according to fixed intervals, and after the position of a fire vehicle in the tunnel is positioned, a smoke discharging port opening and closing control module opens the directional smoke discharging ports near the fire position; the problem of smoke exhaust in the tunnel is solved, and the purposes of energy conservation and smoke exhaust are achieved.

Disclosed is a building center flue system. The system comprises extractor hoods installed at different floors. An air outlet of each extractor hood communicates with a public flue through a corresponding smoke tube. An air outlet channel vertically and directly communicates with an outlet of the public flue is installed on a roof. The system is characterized in that the caliber of the air outletchannel is larger than the caliber of the public flue, at least two independently-working flue fans are installed inside the air outlet channel, and the flue fans are arranged at the position close tothe inner wall of the air outlet channel so as to avoid airflow exhausted from the outlet of the public flue. The system has the advantages that outdoor smoke exhaust power of the building center flue system adopts combination of multiple fans, the flue fans are arranged at the position close to the inner wall of the air outlet channel and avoid the airflow exhausted from the outlet of the publicflue, the arrangement of the fans is more reasonable and scientific and applicable to various complex installation environments, the smoke exhaust resistance of the system is small, the system is higher in smoke exhaust efficiency, saves more energy, and is higher in reliability, and the fans are longer in service life.

The invention discloses a smoke discharging system for a plasma cutting machine, and relates to the technical field of smoke discharging. A grid is arranged at the upper portion of a cutting table ofthe plasma cutting machine. A plurality of vertical partition plates of the grid are arranged in the extending direction of the cutting table. A smoke gathering channel is formed between every two adjacent vertical partition plates. The smoke discharging system comprises an air suction device. The air suction device comprises a first sliding air suction end and a first sliding air flue which are used in combination, wherein the first sliding air suction end is arranged on a sliding frame, an air suction port of the first sliding air suction end is right opposite to a port of the smoke gathering channel, and the first sliding air flue is connected to a dust remover through an air pipe. The efficient smoke discharging system for the plasma cutting machine is provided. By means of the smoke discharging system, smoke generated in the plasma cutting machine cutting process can be effectively collected and treated, air cleanliness of the machining area is guaranteed, and hurt to operators from smoke is reduced.

The invention provides a subway station atrium fire smoke exhaust system and method based on an electric ceiling screens. The smoke exhaust system comprises a platform layer and a station hall layer, wherein the platform layer is located underground, the station hall layer is located on the ground, a through atrium area is arranged in the middles of a public area of the platform layer and a public area of the station hall layer, smoke exhaust ports are formed in the top of the public area of the station hall layer, an atrium smoke exhaust port is formed in the top of the atrium area, outside the atrium area, telescopic electric ceiling screens are arranged at the top of the public area of the station hall layer, and air supply outlets are further formed in the top of the public area of the platform layer. According to the control method, according to different conditions, air outlets, air supply outlets and the ceiling screens of the public area of the platform layer and the public area of the station hall layer are selectively opened to be tightly matched with smoke outlets of the atrium, so that the smoke exhaust effect is optimized, and better evacuation conditions are provided for personnel in the station.

The invention relates to a range hood which comprises a smoke deflector (1), a smoke collecting hood (2), a rectifying screen (3) and a box body (4), wherein the smoke collecting hood (2) is provided with an air inlet (21); the smoke deflector (1) is arranged just facing the air inlet (21), and a preset distance is maintained between the smoke deflector and the smoke collecting hood (2); the box body (4) arranged above the smoke collecting hood (2) is internally provided with a fan system (5); and the air inlet (21) of the smoke collecting hood (2) is provided with the rectifying screen (3) which is fixed on the air inlet (21) of the smoke collecting hood (2). The range hood is characterized in that the rectifying screen (3) comprises a row of long strip blades (31) which are arranged along the front and back direction of the range hood, and the cross sections of the long strip blades (31) are plane orthostichous wing-type blade lattices; a plane orthostichous wing-type blade lattice channel is in a contractive state to form an accelerating blade channel; and the direction of an outlet (6) of the blade channel is bias towards one side of an air inlet (51) of the fan system (5). The range hood has the advantages of low noise, high smoke exhaust efficiency, no blocking and no-clean.

The invention is suitable for the technical field of environmentally-friendly exhaust equipment, and provides a fume exhaust funnel cap. The fume exhaust funnel cap comprises a funnel cap body, a fumeexhaust assembly and at least one wind power assembly. The fume exhaust assembly is arranged at the bottom of an inner cavity of the funnel cap body in a rotating mode. The at least one wind power assembly is arranged above the funnel cap body and driven by the wind power to rotate. The wind power assemblies drive the fume exhaust assembly to rotate through a transmission mechanism, and the fumeexhaust speed is increased. A sweeping mechanism is arranged below the funnel cap body, connected with the transmission mechanism and used for sweeping fume dust in a funnel. According to the fume exhaust funnel cap, the fume exhaust assembly is driven by the wind power assemblies to rotate, the fume exhaust efficiency can be improved by the wind energy under the windy condition, the fume exhausteffect is not affected or is slightly affected when no wind exists or a breeze exists, and the fume dust accumulated in the funnel can be cleaned away.