89results about How to "Adjust air volume" patented technology

The invention discloses a novel fume hood. The fume hood comprises a body, wherein the body is provided with an electric air valve; a lifting safety sliding door is arranged on the front of the body; and a face velocity sensor is also arranged on the front of the body. The fume hood also comprises a central control system electrically connected with the electric air valve, the safety sliding door and the face velocity sensor, wherein the face velocity sensor monitors pressure changes in the body after the safety sliding door is lifted, converts the values of pressure changes in the body into electrical signals and transmits the electrical signals to the central control system; and the opening angle of the electric air valve and lifting of the safety sliding door are controlled by the central control system. The fume hood has the following beneficial effects that: energy consumption and air loss in the laboratory are greatly reduced so that a relatively stable environment is maintained for experiments, thus achieving the aims of energy conservation and environmental protection and greatly improving the comfort level and environmental protection property of the laboratory.

The invention relates to an ejecting staged combustion W flame boiler for improving ignition and combustion of pulverized coal. The W flame boiler comprises a furnace hearth which is formed by an upper furnace hearth, a lower furnace hearth, a front furnace arch and a rear furnace arch, a plurality of secondary air nozzle groups which are arranged on the front furnace arch and the rear furnace arch, and a plurality of pulverized coal airflow nozzle groups, wherein the plurality of secondary air nozzle groups and the plurality of pulverized coal airflow nozzle groups are arranged side by side linearly, equidistantly and abreast along a width direction of a furnace, the plurality of pulverized coal airflow nozzle groups can be arranged on the furnace arches at fixed angles, an incident angle of secondary air can be adjusted, a plurality of over-fire air nozzles with adjustable incident angles can be formed in the upper furnace hearth, and two layers of tertiary air nozzles with the adjustable incident angles can be formed in water-cooled walls of front and rear walls of each furnace hearth. By adopting the W flame boiler disclosed by the invention, the combustion of the pulverized coal in the furnace can be effectively improved, the adaptive capacity of the boiler to coal types can be improved, the heat and reheat steam temperature can be effectively adjusted to reach a design value, the emission of NOx and the flue gas temperature can be reduced, slag bonding of the front and rear walls can be prevented, and the thermal fatigue existing in water-cooled walls of a combustion chamber hopper can be avoided.

The invention provides a wall-attached air duct which comprises a duct body. One end of the duct body is an air inlet while the other end of the same is an air outlet, an air retaining plate is arranged in the duct body, and multiple lateral air outlets are arranged on the duct body spirally and all positioned between the air inlet and the air retaining plate. A tunneling working face provided with a press-in-type ventilation system and a foam or spray dedusting system is adopted in a coal mine; by arranging the air retaining plate inside the duct body, when airflow passes through the air retaining plate inside the duct body, a part of the airflow can be diverted to flow towards the lateral air outlets, the airflow becomes spiral airflow through the lateral air outlets which are spirally arranged to blow to the working face at low speed, fresh airflow blows to the working face at low speed to inhibit dust flying, an air curtain is formed around the working face to stop dust-containing airflow of the working face from spreading outwards and effectively prevent gas from gathering, and the air retaining plate can adjust air quantity. The wall-attached air duct is easy to process and convenient to mount.

An air purifying device provided with: a body case having an air suction opening and an air discharge opening; an air purifying section provided in the body case; and an air sending section provided in an airflow path for sucking indoor air into the body case from the air suction opening through the air purifying section and discharging the air indoors from the air discharge opening. The air suction opening is constructed from a first air suction opening provided in at least one side face of the body case, and also from a second air suction opening provided in the lower part of the front face of the body case. A front decorative plate is provided to the front face of the body case, and, out of the area of opening of the first and second air suction openings, the area of opening of at least the second air suction opening can be changed by moving up and down the front decorative plate.

The invention relates to a refrigerator with the functions of continuous freshness-preservation and air purification. The refrigerator comprises a refrigerator cabinet which is internally provided with an air return device and connected with an air purification device. A first air outlet and a second air outlet are formed in the air purification device. A first solenoid valve is arranged on the first air outlet and communicates with the air return device through a first pipeline; a second solenoid valve is arranged on the second air outlet and communicates with the exterior of the air purification device; the first solenoid valve and the second solenoid valve are electrically connected with a controller; and the controller controls the first solenoid valve and the second solenoid valve to open and close correspondingly. According to the refrigerator with the functions of continuous freshness-preservation and air purification, the air purification device is arranged on the refrigerator cabinet, air flowing direction is controlled by controlling the air purification device through the controller, and the function that not only can air in the refrigerator cabinet be purified, but also the indoor environment can be purified is achieved.

The invention relates to a device for reducing the cold air doping rate of hot primary air. The device comprises a blower, an air preheating device and a combustor, wherein the blower, the air preheating device and the combustor are sequentially connected in the air inlet direction. The air preheating device is connected with the combustor through a primary air pipe. The device for reducing the cold air doping rate of the hot primary air is characterized in that a bypass air channel is arranged, the initial end and the tail end of the bypass air channel are connected to different positions of the primary air pipe, the flow direction of the inner air of the bypass air channel is identical with the flow direction of the inner air of the primary air pipe and an inlet closing baffle, a hot primary air cooler, an outlet closing baffle, a pressurizing fan and an air channel compensator are sequentially arranged on the bypass air channel in the air inlet direction. A regulating baffle and a first closing baffle are sequentially arranged on the part, located between the initial end and the tail end of the bypass air channel, of the primary air pipe in the air inlet direction. A pulverized coal feeding machine is arranged behind the tail end, located on the bypass air channel, on the primary air pipe in a connected mode. The device for reducing the cold air doping rate of the hot primary air has the advantages of being simple in structure, convenient to use, low in cost of coal in generating electricity and capable of improving the efficiency of a boiler and saving the operation cost.

The invention discloses an air inlet filter screen plate enabling air inlet speed to be adjustable. The air inlet filter screen plate comprises a rectangular panel and arc filter pieces. A plurality of sets of slotted holes are formed in the panel. Each slotted hole set is composed of a strip-shaped inserting groove and a rectangular air inlet hole. A plurality of filtering holes are formed in the lower ends of the filter pieces. A pair of bent blocking pieces is formed on the two side edges of each air inlet hole. Through holes are formed in the blocking pieces. A plurality of inserting and connecting holes evenly arranged along arc side walls and matched with the through holes are formed in the arc side walls at the two ends of each filter piece. Pin shafts sequentially penetrate the through holes and the inserting and connecting holes to fix the filter pieces and the blocking pieces. Arc adjusting plates are hinged to the ends of the parts, inserted in the inserting grooves, of the arc filter pieces. A pair of adjusting holes facilitating stretching-in of the human hands is formed in each adjusting plate. A dust collecting plate is connected to the bottom end of the panel and fixedly arranged on a rotating shaft in a sleeving manner. Blockage caused by dust accumulating is not likely to happen, and meanwhile the air inlet amount of a draught fan filter device can be adjusted.

An air supplying device capable of easily, intuitively understanding and specifying a desired air supplying range in a movable range of an air supplying part is provided. The device is provided with a base (4) supported on the floor, a pillar (5) disposed on the base (4), the air supplying part (6) disposed at the upper end of the pillar (5), and a moving mechanism (7) allowing the air supplying part (6) to relatively rotate or rotate relative to the base (4) at the horizontal direction. On the upper surface of the base (4), a second touch sensor (26) specifying the air supplying direction of the air supplying part (6) in an annular or arc-like manner so that the lower end of the pillar (5) is surrounded.

The invention discloses an Internet-based server cabinet for database management, which comprises a main cabinet body. Openings are formed in the front side and the rear side of the main cabinet body, one side of each opening is connected with a front side door and a rear side door through hinges, and an air inlet pipe is fixedly installed on the outer side of the rear side door; an air cooler is fixedly installed on the side close to the bottom end of the air inlet pipe, an air outlet end opening of the air cooler is communicated with the air inlet pipe, multiple sets of air outlet cavities are formed in the inner side of the rear side door, air outlets are formed in one sides of the air outlet cavities, and multiple sets of air baffles are installed in the air outlets. According to the Internet-based server cabinet for database management, servers at different positions can be independently cooled through the multiple sets of air outlet cavities in the inner side of the rear side door, air volume adjustment can be achieved through cooperative use of an air baffle in an air outlet and an electromagnetic push rod, therefore, the optimal heat dissipation effect on each server is guaranteed, the energy utilization rate is high, and more energy conservation and environmental protection are achieved.

The invention discloses integrated protective clothing, belonging to the technical field of protective clothing. The integrated protective clothing comprises a protective clothing body, wherein the top of the protective clothing body is connected with a transparent hood; a breather valve is mounted on one side in front of the hood; the protective clothing body comprises a sealing strip, an elasticwaist band and an air inlet; the air inlet is located at a position 100 mm above the elastic waist band; waist taps are arranged on the front side and the rear side of the waist of the protective clothing body; the elastic waist band is installed in the four waist taps; the elastic waist band is of an elastic structure; and functional waist tabs are installed on the front side of the elastic waist band. When the protective clothing is used, the protective property of the protective clothing can be enhanced, bacteria and saliva of a patient can be filtered, ventilation in the protective clothing body can be enhanced, the back of a doctor is not prone to heat generating or sweating, the somatogenic requirements of the doctor can be met in the use process of the protective clothing by the doctor, and the protective clothing is safer and more convenient to use.

The invention discloses a desulfurization spray tower, and relates to the field of spray towers. The key points of the technical scheme are as follows: a waste gas pipe is arrange at the bottom of thespray tower; a cloth balloon is arranged at one end, extending into the spray tower, of the waste gas pipe, a plurality of air outlets are formed in the cloth balloon, elastic ropes are arranged on two sides of each of the air outlets and on the outer wall of the cloth balloon, and one ends, away from the cloth balloon, of the elastic ropes located on two sides of the same air outlet are connected through a sealing plug. When the elastic ropes are in a natural state, the sealing plugs seal the air outlets, and guide plates extending into the air outlets are arranged at one ends, facing the air outlets, of the sealing plugs, and are smaller than the air outlets. Uniformity of waste gas entering the spray tower is improved, the waste gas reacts with spray liquid more fully, and the waste gas treatment efficiency is improved.

The invention discloses a pipeline part used for conveying carbon dioxide gas, and particularly relates to a carbon dioxide gas transfer device. The carbon dioxide gas transfer device is arranged between a carbon dioxide generator and a water spraying pipeline, and comprises a transfer device body, a heating unit and an air supply unit, wherein the heating unit and the air supply unit are arranged in the transfer device body. A gas inlet connected with the carbon dioxide generator and a gas outlet connected with the water spraying pipeline are formed in the transfer device body. The air supply unit supplies air to the gas outlet. A gas guide urn is fixedly arranged in the transfer device body. Two opposite ports are arranged on the gas guide urn. One port is an inlet connected with the gas inlet through a gas guide pipe, and the other port is an outlet facing the gas outlet. A cover body used for sealing and covering the outlet is arranged on the gas guide urn. A set of flat gas outlet holes are formed in the circumferential side of the cover body. The carbon dioxide gas transfer device overcomes the technical defect that in the prior art, pipe blockage and influences on growth of part of plants exist, and the carbon dioxide gas transfer device used for providing dry ice sublimation is provided.

The invention discloses a device for preventing ash from being accumulated in a rear smoke channel of a coal-fired boiler subjected to denitration transformation. The device comprises an economizer outlet vertical smoke channel, an air supply pipeline, a hot primary air pipe, an air preheater and an ash bucket arranged at the tail end of the economizer outlet vertical smoke channel. The hot primary air pipe is externally connected with a bypass air channel, and the bypass air channel communicates with the economizer outlet vertical smoke channel through the air supply pipeline. The hot primaryair pipe and an inlet smoke channel are connected with the air preheater. According to the device, the hot primary air pipe on an outlet of the air preheater is externally connected with the bypass air pipeline, hot primary air is sprayed in through a rectangular spraying opening of a smoke channel at the position, prone to ash accumulation, of an outlet of an economizer, the gas flow speed of adry loose ash accumulating area can be increased due to the sprayed hot primary air, gas force carries dry ash to the ash bucket on a subsequent smoke channel, and therefore ash accumulation on a bendbetween the vertical section of the outlet of the economizer and the horizontal section can be avoided. The device is small in structural size, can be easily mounted in narrow space, and is safe andreliable in performance and small in construction amount and investment.

The invention discloses an adjustable granary ventilation opening device, and relates to the technical field of granary ventilation equipment. The adjustable granary ventilation opening device comprises a mounting outer cylinder, an adjusting sleeve ring and a second support, a first support is arranged on the inner side wall of the other end of the mounting outer cylinder, a plurality of rotatingshafts are symmetrically arranged on the first support and fixedly connected with fan blades, the adjusting sleeve ring is rotatably connected with one end of the mounting outer cylinder, driving gears are arranged on the inner side wall of the adjusting sleeve ring, the second support is arranged on the inner side wall of one end of the mounting outer cylinder, a plurality of fixing seats are symmetrically arranged on the second support and rotatably connected with nuts, driven gears are fixedly connected onto the nuts and internally engaged with the driving gears, lead screws are arranged in the nuts in a matched manner, a shaft ejector sleeve is arranged at one end of each lead screw, two pull rods are rotatably connected onto each shaft ejector sleeve, and one end of each pull rod isrotatably connected onto the inner side face of the corresponding fan blade. The fan blades are rotatably adjusted by gear components, lead screw components and the like, and the air quantity of an air opening is adjusted.

The invention relates to the technical field of computer fans, and discloses a computer cooling fan capable of adjusting the air volume for intelligent manufacturing. The computer cooling fan comprises a driving motor, a sleeving mechanism is mounted on a driving shaft of the driving motor, connecting mechanisms are uniformly distributed on the sleeving mechanism, fan blades are fixedly mounted on the connecting mechanisms, adjusting mechanisms are further mounted between the sleeving mechanism and the connecting mechanisms, and cleanings mechanism are mounted at the top ends of the fan blades and connected with driving mechanisms through transmission mechanisms. According to the computer cooling fan, it can be guaranteed that the angles of the fan blades can be adjusted through the sleeving mechanism and the connecting mechanisms, the angles of the fan blades are adjusted through the adjusting mechanisms, the fan blades can be driven by different air volumes at the same rotating speed, and the air volume of the fan can be adjusted according to the temperature of a computer case; besides, the cleaning mechanisms are arranged to conduct automatic dust removal operation on the fan blades, dust accumulation is prevented from affecting the working effect of the fan, and the practicability is high.