261results about How to "Improve smoke exhaust effect" patented technology

The invention discloses an intelligent integrate kitchen with an interaction function, which comprises a floor cabinet, a wall cupboard and a main control panel, wherein a hearth is arranged on the floor cabinet; an electronic gas stove is mounted on the hearth; cooking appliances are arranged at the upper end of the electronic gas stove; a smoke exhaust ventilator is mounted on the wall cupboard at the position over against the electronic gas stove; a main controller, a data memory, a main display screen and a first wireless transceiver are arranged on the main control panel; the electronic gas stove comprises a gas stove controller, an electronic igniter, an electronic regulating valve, a gas stove control button and a second wireless transceiver; and the smoke exhaust ventilator comprises an air blower, a ventilator controller and a third wireless transceiver. The intelligent integrate kitchen aims to realize the linkage between the electronic gas stove and the smoke exhaust ventilator through the main controller, and has the advantages that when using the electronic gas stove to cook food, the smoke exhaust ventilator is controlled by the main controller to carry out corresponding smoke exhaust work; and the guarantee of good cooking work environment is facilitated.

The invention provides a prefabricated building structure, comprising prefabricated columns, a prefabricated raised beam, prefabricated recessed-end rib cavity plate members, a longitudinal combination rib beam, a reconstituted cross rib beam, a combining joint, and a side structural wallboard. The prefabricated building structure is characterized in that each end of each prefabricated column is provided, in advance, with structural rebars; at least one side of each prefabricated column is provided with a reserved hole; a rebar channel for the longitudinal combination rib beam is prefabricatedin the prefabricated raised beam; the reconstituted cross rib beam is formed by connecting cross rib beam rebars between two prefabricated cavity plate members; each prefabricated cavity plate memberis composed of a longitudinal reinforced concrete rib beam, a cross reinforced concrete rib beam, a cavity, and a flower flange plate; the prefabricated cavity plate members are mounted on two sidesof the prefabricated raised beam; the combining joint for the prefabricated cavity plate members has a depth of < / -50 mm; the side structural wallboard is fitted to the outer surfaces of the prefabricated columns and is a self-insulation wallboard.

The invention provides a fan control method and device. The method comprises the steps: obtaining on-off state information of smoke exhausting equipment arranged at a plurality of floor air inlets in a flue and the equipment information of the smoke exhausting equipment; when the smoke exhausting equipment in an on state exists, determining target air pressure and target air volume of smoke exhausted from the flue according to the equipment information of the smoke exhausting equipment in the on state; according to the target air pressure and the target air volume, determining the target frequency of a fan arranged at a flue outlet by using a preset air pressure and air volume curve; sending a control signal to a frequency converter, thus enabling the frequency converter to drive the fan to work according to the target frequency, and then exhausting the smoke exhausted by the smoke exhausting equipment in the flue. The method achieves the technical effects that the working frequency of the fan is adjusted along with the change of the air volume and the air pressure in the flue, and the demand of the air pressure and the air volume is matched with output; energy is saved, and the smoke exhausting effect is good.

The invention discloses a range hood capable of self-adaptively regulating the rotating speed of a fan. The range hood comprises a range hood shell, a motor arranged in the range hood shell and a speed regulation control circuit capable of controlling the rotating speed of the fan, wherein the motor is connected with an air outlet through an exhaust pipeline; and the air outlet is communicated with a public flue. The range hood is characterized by being provided with a sensor capable of detecting the pressure variation of the public flue, wherein an induction output end of the sensor is connected with an input end of the speed regulation control circuit; and an output end of the speed regulation control circuit is connected with the motor. When the pressure variation of the public flue is detected by the sensor, a corresponding decision is made; according to output power of a motor system which is required under corresponding pressure, the rotating speed of the fan of the range hood can be self-adaptively regulated, so that the smoke exhausting effect of the public flue is improved, and the flue is prevented from being plugged; and simultaneously, cooking fumes in a room can be smoothly removed, and a smoke exhaust environment of a kitchen is effectively improved.

The invention provides a pressure-induction speed increasing control method, a high-static-pressure fan system and a range hood. The pressure-induction speed increasing control method comprises the steps that S100, the back pressure value of an outlet, in a public flue, of a fan is detected, a control device acquires and compares the back pressure value, and the rotating speed and the power of a brushless direct-current motor are controlled according to the compared result so as to control the static pressure and the air volume of the fan; S200, when the obtained back pressure value is less than or equal to a preset value, the fan keeps the original gear function, the control device performs constant-power output control, the brushless direct-current motor keeps the constant rotating speed and power, and the fan keeps the constant static pressure and air volume; and S300, when the obtained back pressure value is greater than the preset value, the fan starts the cruising function, the control device performs variable-power control, the brushless direct-current motor changes the rotating speed and the power, and the fan is driven to change the static pressure and the air volume. According to the technical scheme of the pressure-induction speed increasing control method, the high-static-pressure fan system and the range hood, the air volume and the static pressure of the fan can be adjusted in real time according to the volume of kitchen oil fumes and the back pressure condition of the public flue, and the good oil fume exhausting effect can be achieved.

The invention discloses a range hood air conditioner and a control method of the range hood air conditioner. The range hood air conditioner comprises a range hood module, an air conditioner module and a control module, wherein the range hood module comprises a plurality of range hood wind gears; the air conditioner module comprises an indoor unit module and an outdoor unit module, the indoor unit module comprises a plurality of air conditioner wind gears, the indoor unit module is spaced from the range hood module and comprises a case, a heat exchanger and a draught fan, air inlets and an air supply port are formed in the case, and at least one air quality detection device used for detecting the air quality is formed in the position, close to the air inlets, of the case and / or the heat exchanger; and the control module is electrically connected with the range hood module and the indoor unit module so that the wind gear of the range hood module and / or the indoor unit module can be adjusted according to a detection result of the air quality detection device. According to the range hood air conditioner, airflow interference between the range hood module and the indoor unit module of the range hood air conditioner can be improved easily, and the cooking fume discharging effect of the range hood module is improved.

The invention discloses a lampblack machine and a controlling method thereof. The lampblack machine comprises a blower system and a controlling system; the blower system comprises a motor; and the controlling system comprises a main controlling module, a temperature detecting module and a rotating speed regulating module, wherein the temperature detecting module is used for detecting the winding temperature of the motor and transmuting detected data to the main controlling module, and the main controlling module is used for controlling the rotating speed regulating module to regulate the rotating speed of the motor according to the winding temperature. According to the lampblack machine, the temperature detecting module is arranged, the motor winding temperature of an exhaust system is detected, whether an air outlet of the lampblack machine is subjected to abnormal resistance or not is judged according to comparison of the detecting temperature with the reference temperature value, and the motor is controlled to automatically regulate the rotating speed on the basis of comparison; and when the fact that the air outlet of the lampblack machine is subjected to the abnormal resistance is judged, the rotating speed of the motor is increased, and the normal rotational speed is restored when the abnormal resistance disappears, so that the better smoke removal effect is obtained, andenergy consumption can be reduced.

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 smoke discharging method of aluminum cell, especially to an intensified smoke discharging method by hood-open processing. The invention accomplishes air-breathing by using air-proof space, which is formed by catelectrode, groove shell, horizontal cover plate of superstructure and seal closure, slot space on anode surface mulch as static pressure cabinet, ventilating structure and intensified ventilating path. The invention can ventilate efficiently, increase gas-collecting efficiency and inhibit contaminant emitting.

The invention provides a novel tunnel kiln structure and a method for processing organic polluted soil. The method comprises the steps of detecting types and contents of mineral substances in the organic polluted soil, then adding required materials according to the tile firing requirements or the firing requirements, adding internal fuel, adding water to mix the materials to obtain raw pug materials, sequentially pugging, pelletizing, extruding and forming the raw pug materials, decaying or curing the raw pug materials for 5-10 days, drying the raw pug materials, sending the raw pug material into the tunnel kiln to be fired, sequentially keeping green bricks or green tiles in a preheating zone kiln body at the temperature of 150-750 DEG C for 30 minutes to 1 hour and in a firing zone kiln body at the temperature of 750-1350 DEG C for 2-3 hours, then sending the green bricks or the green tiles into a cooling zone kiln body to be naturally cooled to the normal temperature and outputting the green bricks or the green tiles. The method can completely remove toxic substances like various pesticide residues in the soil through high temperature and is high in processing efficiency, low in cost, free of secondary pollution and obvious in environmental-friendly benefit.

The invention relates to ventilation and fire control of road tunnels, in particular to a method for initiating a smoke outlet of the road tunnel. The method comprises a smoke vent arranged along the length direction of tunnel and a plurality of smoke outlets arranged at the top of the tunnel, wherein, the smoke vent is internally provided with a smoke exhaust blower, the smoke outlets are communicated by the smoke vent; the method is characterized in that the initiating method is : when a fire source appears, after the fire source position is fixed, two smoke outlets at the lower reaches of a fire source point and a smoke outlet at the upper reaches of the fire source point are initiated; the method has the advantages of optimizing smoke exhaust effect of the road tunnel, improving smoke control capacity, reducing influence range thereof on the basis of the same smoke exhaust configuration, effectively controlling proliferation of smoke within the range of 150m, maintaining fine smoke layering and providing relatively good safe space for the specialized personnel.

Provided is an automatic smoke exhaust device for a large-space building catching a fire. A top ceiling of the large-space building is provided with a plurality of vertical-type smoke exhaust pipelines, smoke exhaust fans are coaxially installed in the smoke exhaust pipelines, openings of the smoke exhaust pipelines are covered with protection covers, flexible drapery cylinders are arranged in the circumference direction of the lower portions of the smoke exhaust pipelines, the upper ends of the flexible drapery cylinders are fixedly installed on the ceiling, each drapery cylinder is symmetrically provided with a plurality of pull ropes ,the lower ends of the pull ropes are fixed to the lower ends of the drapery cylinders, the upper ends of the pull ropes are tightly wound on idler wheels driven by a motor, a fire detector arranged in the large-space building is connected with a fire alarm main unit in a fire protection control center through an alarm signal line, the fire alarm main unit transmits signals to a control unit of the automatic smoke exhaust device, and the control unit is connected with an emergent power supply through a control line and is provided with an audible and visual alarm. When the fire breaks out, the device can descend the drapery cylinders to a smoke accumulation floor to exhaust smoke, the smoke exhaust effect is greatly improved, smoke diffusion speed is effectively reduced and control of smoke in the early and middle stages of the fire is facilitated.

The invention relates to a novel extractor hood with intelligent overturning smoke barriers. The novel extractor hood comprises an extractor hood main body and reversible smoke barrier assemblies. The reversible smoke barrier assemblies are located at the two sides below the extractor hood main body. Each reversible smoke barrier assembly is composed of one smoke barrier, a rotating shaft, a motor fixing rack, a synchronous motor, a drive gear assembly, rotating shaft mounting bases and a motor control system. Each smoke barrier is fixedly connected with the corresponding rotating shaft. The two ends of each rotating shaft are connected to the corresponding rotating shaft mounting bases. The rotating shaft mounting bases are fixed below the extractor hood main body. One end of each rotating shaft is engaged with the corresponding drive gear assembly, and each drive gear assembly is fixedly connected with a drive shaft of the corresponding synchronous motor. Each synchronous motor is fixed to the corresponding motor fixing rack. The motor fixing racks are fixed to the extractor hood main body. By means of the novel extractor hood with the intelligent overturning smoke barriers, the smoke gathering region of the extractor hood is effectively widened, smoke exhaust capacity of the extractor hood is improved, motor power of the extractor hood can be lowered, and energy consumption is reduced.

The invention provides a production method of flame-retardant automotive roof fabric. By the production method, the technical problems that existing production methods have excessively complex steps, manual operation is needed, production speed is low and the like are solved. The production method of the flame-retardant automotive roof fabric includes a, raw material purchase, b, surface layer production, and c, compounding. The production method has the advantage of high production speed.

The invention provides an automatic control method of a kitchen ventilator, an intelligent flue gas sucking system and a flow guide system, which can realize the automatic control of smoke exhaust, prevent generated flue gas from dispersing and further realize the automatic control of smoke guide. The intelligent flue gas sucking system comprises a kitchen ventilator, a first wireless signal receiving device electrically connected with a start circuit of the motor of the kitchen ventilator, a wireless controller electrically connected with the first wireless signal receiving device through wireless signals and a first inducing device which is used for inducing lampblack and connected with the wireless controller. The intelligent flue gas flow guide system comprises a kitchen ventilator, a first wireless signal receiving device electrically connected with the motor of the kitchen ventilator, smoke guide equipment capable of stopping flue gas from dispersing, a second wireless signal receiving device electrically connected with the motor of the smoke guide equipment, a first inducing device for inducing lampblack, a second inducing device for inducing temperature or flames and a wireless controller.

The invention discloses an integrated cooker with an air duct easy to clean and relates to an integrated cooker. An air duct of a current integrated cooker is not convenient to clean and is troublesome to disassemble, professional staff need to perform on-site installation after sale, and the cleaning task cannot be fast completed in time. The integrated cooker with the air duct easy to clean comprises a machine body and a machine head arranged on the upper portion of the machine body; the machine body is provided with a stove, an air collection box, a volute assembly and an oil collecting assembly arranged below the volute assembly; the volute assembly comprises a volute, a motor arranged in the volute and an air wheel driven by the motor; an air inlet cavity is formed in the machine head; the air collection box is internally provided with an air collection cavity communicating with the air inlet cavity of the machine head; and the volute is provided with a smoke vent. The integrated cooker with the air duct easy to clean is characterized in that the air wheel is vertically arranged so that oil liquid can drop down in the direction of blades of the air wheel. In the technical scheme, the air wheel is vertically arranged, the blades of the air wheel are vertically arranged, the oil liquid falls in the oil collection assembly under the effect of gravity, it is avoided that the oil liquid is accumulated on the air wheel and the motor, oil accumulated in the air duct is little, cleaning is easy, the air duct is kept unobstructed, and the smoke exhausting effect is improved.

The invention breaks through the design concept of the traditional range hood and relates to a negative pressure type range hood. A volute fan is not arranged in a lampblack duct, the space of a smoke exhaust duct is enlarged, and resistance of lampblack passing the smoke exhaust duct is reduced. According to the negative pressure type range hood designed with the new concept, an air inlet is changed to be a smoke exhaust negative pressure duct, and the lampblack enters a smoke collection casing through a lampblack filter screen, passes a lampblack outlet duct formed by upward air exhausting of a positive pressure air outlet and is exhausted from a lampblack outlet. The negative pressure type range hood is characterized in that the volute fan is arranged on the outer side of the smoke exhaust negative pressure duct, the positive pressure air outlet integrally connected with the volute fan is connected with the upper end of the smoke exhaust negative pressure duct by upwards forming an inclined angle, the lampblack outlet duct connected with the positive pressure air outlet and the smoke exhaust negative pressure duct is formed, and an independent air inlet of the volute fan is arranged outside an upper casing and is not connected with the negative pressure duct of the range hood.

The invention discloses a high-strength gas flue, which is formed by assembling four lateral plates, wherein the cross section of the gas flue is rectangular, and four corners on the inner side of the gas flue are provided with strengthening ribs connected with adjacent lateral plates. The high-strength gas flue has the following remarkable advantages that: 1, the weight is light, a gas flue of three meters in length has only about 70 kilograms which is less than one fourth of the weight of the prior product with the same size, thus the transportation and the assembly are very convenient; 2, the vertical bearing capacity of each gas flue reaches up to 15 to 16 tons; 3, too many production moulds and production sites are not needed, the manufacture is very convenient, the yield is high, and the gas flue is suitable for mass production; and 4, the cost is low.

The invention discloses a public building flue system. The system is characterized in that air outlets of range hoods communicate with a public flue, the range hoods are provided with indoor unit control systems, an air outlet channel communicating with the public flue is arranged at a roof, an outdoor main fan is arranged in the air outlet channel, an air pressure sensor used for detecting the outlet pressure of the public flue is arranged in the air outlet channel, a main control system capable of communicating with the indoor unit control systems is arranged on the roof, and the main control system can correspondingly adjust the rotating speed of the outdoor main fan according to the number of the started range hoods and the outlet pressure, received from the air pressure sensor, of thepublic flue. According to the public building flue system, the main control system can correspondingly adjust the rotating speed of the outdoor main fan according to the number of the started range hoods and the outlet pressure, received from the air pressure sensor, of the public flue, so that the constant negative pressure of the flue is ensured, a good smoke discharging effect is achieved, theproblems such unsmooth smoke discharging and smoke returning are solved, and the system is high in efficiency and stable in operation.

The invention provides a novel range hood. The novel range hood comprises a flow guide cover, a smoke exhauster and a smoke exhaust pipe, wherein an opening of the flow guide cover is aligned to an oil smoke source, the smoke exhaust pipe communicates with the top of the flow guide cover and the exterior of the novel range hood, and the smoke exhauster guides air inside the flow guide cover out of the novel range hood through the smoke exhaust pipe; a flow separation cavity and an air inlet fan are arranged outside the flow guide cover, an air inlet communicating with the exterior is formed in a wall of the flow separation cavity, the flow separation cavity is provided with an air outlet, and the air inlet fan blows the air to the periphery of the oil smoke source through the air outlet of the flow separation cavity, so that an air curtain is formed. The air in the flow separation cavity is exhausted through the air outlet and then is blown to the periphery of the oil smoke source, the air curtain is formed around the oil smoke source, diffusion or escape of the smoke is prevented, and the smoke is forced to be gathered towards the middle and can be conveniently exhausted out of the novel range hood by the smoke exhauster.

The invention relates to a multifunctional tunnel fire side key smoke discharge simulation platform comprising a tunnel main body, a smoke discharge channel, a fire source simulation device, an air supply device and a fire detection device; one end of the tunnel main body can move up and down, at least one opening is formed in the bottom of the tunnel main body, and the fire source simulation device is arranged at the opening and is used for simulating a fire; the two ends of the smoke discharge channel are both open, one side of the smoke discharge channel is open, the other side of the smokedischarge channel is closed, the open side of the smoke discharge channel is fixedly installed on one side of the tunnel main body, and a plurality of smoke outlets in communication with the smoke discharge channel are uniformly formed in one side of the tunnel main body at intervals; the air supply device is arranged at one end of the tunnel body and is used for supplying air to the tunnel body,and the fire detection device is arranged in the tunnel main body and is used for detecting the fire situation in the tunnel main body. The simulation platform in the invention has the beneficial effects that the situation of fire combustion in the tunnel main body under different conditions is simulated, the distribution condition of the smoke gas and the fire law in the tunnel main body are observed, and a theoretical experimental basis is provided for construction of actual tunnels.

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 fixed-length welding method of a connection port of a blower shell. The fixed-length welding method comprises the following steps: a, mounting a flat pushing device; b, mounting a sliding device; c, mounting a fixed-length adjustment device; d, adjusting a distance between two clamp plates; e, mounting first material plates; f, welding a second material plate between thefirst material plates; and g, coating protective paint. According to the fixed-length welding method disclosed by the invention, a distance between the inner side surfaces of the two clamp plates canbe adjusted, so that the distance between the inner side surfaces of the two clamp plates is external width of the connecting port of the blower shell, and the size of the connecting port of the blower shell is strictly controlled, and thus, deviation between the size of the connecting port of the blower shell and an opening of the blower shell is reduced; moreover, the arranged positions of the two clamp plates are not changed in a welding process, and the connecting port of each blower shell is not needed to be positioned again; and through mutual cooperation of a positioning device, the clamp plates and a limiting fixation device, positioning of the connecting port of the blower shell is carried out, and therefore, the fixed-length welding method disclosed by the invention has the advantages of high manufacturing efficiency and low manufacturing cost, and is suitable for batch production.

The invention relates to a smoke exhaust system for a common flue of a building. The system comprises a common flue and extractor hoods mounted in floors. An electric heating film is mounted on the inner wall of the common flue, a first temperature sensor for detecting the lampblack gas temperature of the flue is mounted in the common flue, and a second temperature sensor for detecting outdoor temperature is mounted on the roof. The smoke exhaust system also comprises an electric heating film control system and a master control system. The master control system can read the value of the second temperature sensor, the electric heating film control system can read the value of the first temperature sensor and the value of the second temperature sensor sent by the master control system, and can control an electric heating film according to a temperature difference value between the inner part of the common flue and the outdoor part. The smoke exhaust system has the advantages that the smoke exhaust system for the common flue of the building can change the temperature difference between the temperature of the lampblack gas in the flue and the outdoor environment by controlling the electric heating film, so that the hot pressing action of the flue is enhanced, the pressure distribution of the flue is enhanced, and the smoke exhaust capacity of the flue is improved.

The invention discloses a range hood and a control method thereof. The range hood comprises a casing and an air curtain device, wherein the casing comprises a panel and an opening and closing plate; the panel is provided with an air inlet for air intake; the opening and closing plate is movably arranged; the opening and closing plate is provided with a first position for closing the air inlet, anda second position for opening the air inlet; when positioned at the first position, the opening and closing plate blocks the air curtain device; when the opening and closing plate is positioned at the second position, the air curtain device is exposed out, and an air curtain can be formed. The range hood has the advantages that by arranging the air curtain device, the better smoke exhaust effectis realized, and the diffusion of smoke is avoided; the opening and closing plate can block the air curtain device, so that the appearance of the whole range hood is more attractive.

The invention provides a building with a prefabricated reinforced concrete support. The building comprises the prefabricated reinforced concrete support, a prefabricated column frame, prefabricated main beams, cavity floor components, joint shallow seams between the cavity floor components, and wallboards. The building is characterized in that the prefabricated reinforced concrete support is rhombic, and rhombic corner angles are provided with main beam assembly ends; a square column hole is formed in the middle of the prefabricated reinforced concrete support, the prefabricated column frame is a thin-wall frame, and the thickness of the thin-wall frame is smaller than or equal to 50 mm; wallboard connecting pieces are mounted on the outer surface of the prefabricated column frame, and thecavity floor components are hexagonal and comprise longitudinal reinforced concrete ribbed beams, transverse reinforced concrete ribbed beams, cavities and steel mesh concrete lower flange thin boards; and longitudinal ribbed grooves and the shallow joint seams are formed between the cavity floor components, and the wallboards are transverse wallboards.

A building public flue smoke discharging system comprises a public flue and extractor hoods installed on various floors; a first temperature sensor used for detecting an outdoor temperature is installed on a roof; a heater, a second temperature sensor and a third temperature sensor are installed in the public flue; the second temperature sensor is used for detecting the lampblack temperature in the public flue; the third temperature sensor is used for detecting the temperature of gas after being heated by the heater in the public flue; a main control system reads the reading of the first temperature sensor; and a heater control system reads the reading of the second temperature sensor and the third temperature sensor and receives the reading, from the main control system, of the first temperature sensor, and thus can control the heater. The building public flue smoke discharging system has the beneficial effects that the building public flue smoke discharging system can change the temperature difference of the temperature of lampblack gas in the flue and the outdoor environment by controlling the heater, the flue heat pressure effect is enhanced, flue pressure distribution is improved, and the flue smoke discharging capacity is improved.

The invention discloses a range hood capable of self-adaptively regulating the rotating speed of a fan. The range hood comprises a range hood shell, a motor arranged in the range hood shell and a speed regulation control circuit capable of controlling the rotating speed of the fan, wherein the motor is connected with an air outlet through an exhaust pipeline; and the air outlet is communicated with a public flue. The range hood is characterized by being provided with a sensor capable of detecting the pressure variation of the public flue, wherein an induction output end of the sensor is connected with an input end of the speed regulation control circuit; and an output end of the speed regulation control circuit is connected with the motor. When the pressure variation of the public flue is detected by the sensor, a corresponding decision is made; according to output power of a motor system which is required under corresponding pressure, the rotating speed of the fan of the range hood can be self-adaptively regulated, so that the smoke exhausting effect of the public flue is improved, and the flue is prevented from being plugged; and simultaneously, cooking fumes in a room can be smoothly removed, and a smoke exhaust environment of a kitchen is effectively improved.

The invention provides a smoking chest belonging to the technical field of furniture. The smoking chest solves the problems of secondary pollution and poor environmental protection caused by high power consumption and poor smoke extraction effect of the existing smoke discharge device. The smoking chest comprises a chest body having a table top, wherein a purifying device with a fan and a smoke extraction assembly for purifying cigarette smoke is fixed in the chest body; the inlet of the fan is communicated with the outlet of the smoke extraction assembly; and a collection assembly is arranged on the chest body, which is communicated with the inlet of the smoke extraction assembly and capable of collecting cigarette smoke in the peripheral area of the chest body when the fan is started. The smoking chest is low in power consumption and good in smoke extraction; and the exhausted gas after being purified may not cause secondary pollution on the environment; and therefore, the smoking chest is environment-friendly, beautiful and practicable.