121results about How to "Stable air volume" patented technology

The invention discloses a system and a method for controlling a range hood capable of outputting constant air volume. The system comprises a controller; the controller is connected with a user control panel, a speed sensor, a current sensor and a storage, wherein the user control panel is used for enabling a user to input the initial air volume Qu; the speed sensor is used for detecting the actual speed n of a motor; the current sensor is used for detecting the actual current i of the motor; the storage is used for storing data such as the speed N, the current I, the static pressure P and air volume Q; the air volume is directly proportional to the speed; the static pressure is directly proportional to the square of the speed; the current is directly proportional to the cube of the speed. Through the judging whether the air volume Q is within the difference value delta Q range or not, the actual speed N is adjusted to change the air volume Q to achieve the purpose that the range hood can output constant air volume.

The invention provides a motor controller and a motor control method. The motor control method is that a microcontroller of the motor controller receives a set value and outputs a pulse width modulation signal to a power drive circuit according to the set value, a current feedback circuit of the controller samples a current signal passing the power drive circuit, converts the current signal into a voltage signal and outputs the voltage signal to the microcontroller, a rotating speed feedback circuit of the controller samples a rotating speed signal of a rotor of a sampled motor and outputs the rotating speed signal to the microcontroller, and the microcontroller calculates a calculated value according to a specific value of the voltage signal to the rotating speed signal and adjusts the duty ratio of the pulse width modulation signal output to the power drive circuit according to the size relationship of the calculated value and the set value. The controller controls the motor by means of the motor control method. The motor controller can ensure air volume of a fan to be kept constant when the motor is applied to a fan and meet the requirements of the fan in different application occasions.

The invention is suitable for the technical field of an air conditioner, and discloses an air conditioner and an air supplying method of the air conditioner. The air conditioner comprises a casing and a heat exchanger arranged in the casing, wherein an air inlet is formed in the casing; the casing is provided with an air hole penetrating through the casing; an air outlet which is used for blowing out the airflow to enable the negative pressure to be generated at the air hole is formed in the inner wall of the air hole; an airflow generating device which is used for driving the airflow to enter into the casing from the air inlet and discharging the airflow out the casing from the air outlet after the airflow flows through the heat exchanger is arranged in the casing; the air hole is positioned in one side of the airflow generating device. The air supplying method of the air conditioner adopts the air conditioner. By adopting the air conditioner and the air supplying method of the air conditioner, the aerodynamics theory is used, and an air supplying effect having performance many times higher than the performance of the air inlet and the air outlet is formed; the energy efficiency utilization is high; the air supplying effect is excellent; the air output is stable and uniform; people feel comfortable; the energy-saving and environment protection effect of the air conditioner is excellent.

The invention belongs to the technical field of coal mines, and discloses a dust collecting and removing system for a wind curtain in a fully mechanized excavation face. The dust collecting and dust removing system for the wind curtain in the fully mechanized excavation face comprises a pressing-in system; the pressing-in system comprises an wind curtain flow jetting device, a pressing-in type ventilator and a pressing-in type wind tube; the pressing-in type ventilator communicates with the wind curtain flow jetting device through the pressing-in type wind tube; the wind curtain flow jetting device comprises a mining tunneling high pressure blower, a first wind curtain wind-pressing wind tube, a second wind curtain wind-pressing wind tube, a flow jetting box and a flow jetting cavity. According to the dust collecting schemes, a wind curtain is installed additionally and reasonably on the basis of a wind supplying and dust removing system in an original fully mechanized excavation face, fully mechanized excavation free face is sealed, by reasonable adjusting the wind speed and wind volume of a flow field, dust is controlled to not diffuse to a roadway and not affect working, accessing and observing of a personnel, after the dust source is sealed by the wind curtain, airflow with the dust is drawn out by a dust removing device, the dust removing and purifying process of the airflow with the dust is finished accordingly, and the purpose of dust controlling is effectively achieved.

The invention discloses a wind power dedusting system for a rolling process of a cigarettes factory. The wind power dedusting system comprises a deduster connecting pipe, a plurality of branch wind pipes and a plurality of pieces of rolling and packing equipment, wherein each piece of rolling and packing equipment is connected with a branch wind pipe; the wind power dedusting system also comprises a wind compensating pipe with a wind compensating silencer and a main wind pipe; the deduster connecting pipe and the wind compensating pipe are respectively communicated with the main wind pipe; the main wind pipe is respectively communicated with each branch wind pipe through a pipe collector; and the wind compensating pipe is provided with a control valve which is used for automatically switching on to compensate wind when a certain branch wind pipe is stopped. The wind power dedusting system can concentrate wind power for supply, and ensure stable wind quantity, wind pressure and wind speed; the pipeline design is more standardized and unified; and the effective operability and the yield of the rolling and packing equipment are improved, the production cost is reduced and the service environment of workers is improved.

The invention is applicable to the technical field of air conditioners and discloses a ceiling air conditioner and an air supplying method using the same. A wind wheel forwards blows out airflow from an air outlet in the side wall or periphery of each wind tunnel, the airflow can carry the adjacent airflow to move forward together while being blown out forwards from the air outlet along the axial direction of the wind tunnel, so that negative pressure is formed in the wind tunnel; under the pumping action of negative pressure, air at the rear part of the wind tunnel is pumped forward so as to enter through an opening in the rear end of the wind tunnel, pass through the wind tunnel and flow out from an opening in the front end of the wind tunnel, so that the air supplying effect of an airflow center is enhanced; furthermore, air around the wind tunnel is supplemented under the action of negative pressure, and the central airflow drives the surrounding airflow to flow forward together, so that the air supplying range is enlarged, an air supplying effect which is at least multiple times that of the air inlet capacity of the air inlet is formed, the energy efficiency utilization ratio is high, a lot of cold air or hot air is prevented from being directly blown to the head of a user and further causing discomfort of the user, the air supplying effect is good, and the comfortable degree of a human body can be improved.

The invention belongs to the technical field of air ducts, and discloses an air duct system, an air supply method of the air duct system and a fan and an air conditioner with the air duct system. An air flow channel is divided into at least two sub channels by air tunnel portions, wind wheels suck air flow in from air inlets, the air flow is made to flow through a heat exchanger and then made to be blown out forwards from air outlets located on the inner side or the periphery of the air tunnels, the air tunnels are front-back through tunnels, air enters an air inlet portion from the air inlets, flows to squeezing portions, then is divided into at least two streams under the effect of the air tunnel portions and then is blown out from the air outlets, air blown out from the air outlets enables the front sides of the air tunnels to form negative air pressure, and air at the rear portions of the air tunnels is sucked forwards and flows out from front end openings of the air tunnels. The air supply effect which is at least multiple times the air inlet capacity of the air inlets is formed through the principles of the aerodynamics, the energy efficiency utilization rate is high, the air supply effect is good, and the energy saving and environment protection effects are good.

The invention discloses cold firework jetting equipment. The equipment comprises an air supply device, a feeding device, a heating device, a cold firework nozzle, a bottom supporting board, a side supporting board, a cold firework nozzle installation board and metal powder. The equipment can overcome the multiple defects that gunpowder is needed in the set-off process of a traditional cold firework barrel, so that potential safety hazards exist, smoke and pungent smell pollution is generated in the set-off process, the jetting time is short and cannot be controlled, and a cold firework jetting device cannot be recycled; and existing cold firework jetting equipment is complex in system structure, clumsy, heavy, poor in controllability, high in cost and the like, and the cold firework jetting equipment has the beneficial effects of being safe, environment-friendly, simple in structure, long in jetting time, good in controllability, capable of being recycled and achieving the good set-off effect and the like.

The invention discloses a constant-flow blower fan and a control method thereof. The control method of the constant-flow blower fan comprises the steps that S100, when the rotating speed of the constant-flow blower fan is n and the value of an output current of a variable-frequency driver is less than a set value, the output current of the variable-frequency driver is increased; when the value of the output current of the variable-frequency driver is greater than the set value, the output current of the variable-frequency driver is decreased. The working current and voltage of the blower fan are controlled by controlling the output current of the variable-frequency driver, and therefore the rotating speed of the blower fan is controlled; after the rotating speed of the blower fan is changed, the corresponding air quantity will be changed, and therefore the air quantity of the blower fan is kept in a reasonable range, and using performance of the blower fan is improved.

The invention belongs to the technical field of air ducts, and discloses an air duct system, an air supply method of the air duct system and an air conditioner with the air duct system. Air flow blown out from all air outlets flows forwards to enable negative pressure regions to be formed on the front sides of all air tunnels, and under the effect of all the negative pressure regions, air on the rear sides of the air tunnels is sucked to penetrate through the air tunnels, so that the air is blown out forwards with the air flow blown out from the air outlets. Due to the fact that air has certain viscosity, when the air flow is blown out from the air outlets, the air flow carries adjacent air flow to flow forwards together, the air supply effect at the air flow center is enhanced, moreover, air around the air tunnels is supplemented due to the effect of negative pressure, the air supply range is expanded, the air supply effect which is at least multiple times the air inlet capacity of air inlets is formed through the principles of the aerodynamics, the energy efficiency utilization rate is high, the air flow does not need to be cut by fan blades, the air supply amount is stable and even, human bodies can feel more comfortable, and the air supply effect is good.

The invention discloses an adjustable circular air blow cooling system, which belongs to the field of fiber manufacturing equipment. High-precision pressure sensors are arranged in both the static pressure bin and air duct bin of a circular air blow device, an automatic control valve is arranged at the position of an air intake pipe, a whole production line is controlled by one computer, and thus, the automatic interlocked air pressure regulation can be realized; and the circular air blow device of which the circular blow head is adjustable is arranged, so that the air pressure and volume stability of the air duct bin are ensured all the time and the product quality is guaranteed to a maximum degree.

The invention discloses a ventilating and energy-saving control method realizing distribution of underground air quantity of an underground mine according to needs. The method comprises the following steps of: performing required airflow theoretical calculation by adopting mine ventilating network solving software according to seasons and operating periods of time; arranging draught fans in a relay manner according to an air current line; arranging an air velocity transducer in a draught fan mounting lane for monitoring air quantity; converting air quantity into draught fan frequency according to principle of similitude, and setting different air quantity allowed errors for the draught fans in different regions; and regulating the air quantity by virtue of a PLC control system. The method disclosed by the invention realizes ventilation of a mine ventilating system according to needs in an overall process from the aspects of calculation of required airflow of the mine, air quantity monitoring, setting of air quantity allowed errors and control and distribution of air supply, has the advantages of being stable to operate, reliable and practical and ventilating and energy-saving, is suitable for a metal / non-metal underground mine ventilating system and particularly suitable for ventilating and energy-saving control of the underground mine according to needs of a multi-draught fan ventilating system, wherein the draught fans are under frequency conversion control.

The invention relates to a fan system, an air pipe machine and an air conditioning unit. The blower system comprises at least two axial fans (3) arranged side by side, wherein the two axial fans (3) are installed oppositely, so that the two axial fans (3) can implement bidirectional switching on the blast direction through the change of the rotation direction. Since the axial fan has the characteristics of forward rotation and reverse rotation and the air outputs of the axial fan during forward rotation and reverse rotation are different, when the two oppositely installed axial fans rotate clockwisely or anticlockwisely at the same time, one of the two axial fans can rotate forwardly, and the other axial fan rotates reversely, thereby ensuring the stable air output, and implementing reversing of the blast direction when the directions of the axial fans are changed.

The invention discloses a software control method for automatically compensating the air volume of an air conditioner, and relates to a method for compensating the air volume through motor parameter detection under the situation that the air volume of an indoor unit is decreased. The method comprises the steps that standard parameters such as Rt and Q0 of the air conditioner are stored in an EEPROM, whenever the air conditioner is started, the fan shaft power P is monitored in real time, the real-time air volume Q of a fan is calculated, when Q / Q0 is smaller than or equal to 85%, the air volume is compensated to the standard air volume from the current air volume at a time through a direct compensation method, and according to a fan law, the fan speed regulation voltage square wave duty ratios before and after compensation are calculated through the proportions of the air volumes before and after compensation; or an adjusted compensation method is adopted to compensate the current air volume to the standard air volume for multiple times, and according to a fan law, the fan speed regulation voltage square wave duty ratios before and after compensation are calculated through the proportions of the air volumes before and after compensation; on the basis that the hardware cost is not increased, compensation is conducted on the air volume by regulating the fan speed regulation voltage square wave duty ratio, the stability of the air volume is guaranteed, and the operation effect and stability of the air conditioner are improved.

The invention provides a heating-not-burning tobacco smoking device based on a mechanical energy storage type air exhausting assembly. The device comprises a shell with an air inlet and an air outlet.An wind wheel, a spring mechanism for driving the wind wheel to rotate, and a twisting handle inserted into the exterior of the shell to store energy for the spring mechanism are arranged on the portion, corresponding to the air outlet, in the shell. A fuel cavity for clamping fuel is arranged on the portion, corresponding to the air inlet, in the shell, a ventilating cavity communicated with theair inlet and the air outlet is formed in the shell, the shell is recessed inwards to form a tobacco containing cavity for containing to-be-heated tobacco matter, only one end of the tobacco containing cavity is communicated with external air, the deep of the tobacco containing cavity penetrates into the shell, and a heat transfer element stretching into the tobacco containing cavity is arrangedon the inner bottom face of the fuel cavity. Heat generation and transfer effects in the tobacco smoking device can be improved and the use experience of consumers is better.

The invention belongs to the technical field of air ducts, and discloses an air duct system, an air supply method of the air duct system, a fan with the air duct system and an air conditioner with the air duct system. Airflow is at least divided into two ways and blown out from air outlets in the two sides of an air tunnel through flow diversion passages, so that airflow moving forwards evenly and stably is formed on the two sides of the air tunnel, strong and stable negative pressure can be generated in the air tunnel, under the suction effect of the negative pressure, air at the rear of the air tunnel is sucked forwards, enters the air tunnel from the rear end of the air tunnel, penetrates through the air tunnel, and then flows out of an opening in the front end of the air tunnel, the air supply effect of an airflow center is enhanced, air surrounding the air tunnel is supplemented due to the effect of the negative pressure, the center airflow drives the airflow surrounding the center airflow to move forwards together, the air supply range is increased, based on the aerodynamics principle, the air supply effect that the air inflow capacity is multiple times of the air inflow capacity of air inlets is formed, the energy efficiency utilization rate is high, and the air supply effect is good.

The invention relates to a ventilation system based on an air and light complementary technology. An air inlet is internally provided with partition boards and is divided into multiple air channels. Any air channel of the air inlet is provided with a bladeless fan. An air draught fan blade is installed on a driving shaft in the air inlet, and the driving shaft is provided with a sealing plate. The periphery of a pipeline below the sealing plate is evenly provided with air holes, and a fresh air pipeline is arranged above the air inlet. An air valve is arranged below the air inlet, and the air valve is connected with a heat exchanger. The side face of the heat exchanger is provided with a used air pipeline which is connected with a solar heat collecting pipeline coaxial with the air draught fan blade. The solar heat collecting pipeline is connected with an exhaust fan, and the lower portion of the heat exchanger is connected with a volute cyclone. According to the ventilation system based on the air and light complementary technology, a solar cell panel can be used for power generating, energy accumulating, heating and exhausting, authigenic ventilation is formed, pollution is avoided, sustainability is achieved, and zero-energy-consumption and high-efficiency ventilation can be achieved.

The invention relates to additive which is used for sintering production and in particular relates to sintered ore powdering inhibitor. The technical scheme is that the inhibitor comprises calcium chloride, magnesium chloride, boric acid and bromine, the weight percentage of each component is that: the calcium chloride 70%-75%, the magnesium chloride 10%-15%, the boric acid 10%-15% and the bromine1%-3%, the purity of each component is that the calcium chloride 92%, the magnesium chloride97%, the boric acid 99.8% and the bromine99.9%, The inhibitor improves the metallurgical property of sintered ores, inhibits powdering, and impels blast furnace conditions to operate smoothly, simultaneously, the metallurgical property of coke is improved, and the coke ratio is lowered. Experiments show that the sintered ore powdering inhibitor has good using effect, the blast furnace is stable and operates smoothly, the air volume is stable, the output is increased, the coke ratio is lowered, and the economic benefit is prominent. The blast furnace output can be increased by 1.5% and the coke ratio can be lowered by 1.55% through adopting the inhibitor of the invention.

The invention discloses a fresh air energy-saving system for a small communication machine room. A fresh air handling unit, an air exhaust unit and an air-conditioner are separately arranged; an accurate monitoring system is added; the fresh air handling unit adopts a G4-level coarse filter and a backward curved-blade type centrifugal fresh air unit; a special air pressure valve and a rotatable efflux nozzle are added; the air exhaust unit adopts an axial-flow type exhaust fan; the monitoring system is provided with a system control board connected with a remote monitoring computer; and the monitoring system can control automatically through a monitor. Therefore, the temperature of the communication machine room is effectively stabilized; the device investment is reduced; the device fault rate is decreased; the service life of the device is prolonged; and the fresh air energy-saving system can be used safely in an energy-saving manner for a long period of time.

The present invention discloses anon-power driven window capable of adjusting ventilation rate. When the sash is unlocked, due to combined action of the sash's gravitational torque and the expansion of a torsion spring against the sash, the window keeps open. The window is designed having a bigger size in the lower section below the pivot than that in the upper section. Subject to the outdoor wind blowing, the moment by the outdoor wind tends to shut the window. In addition, the upper screen is installed in the outer side of the pane above the pivot, while lower screen is installed to the inner side of the pane below the pivot. Thus the lower sash is exposed into the outdoor air and can be easily blown by the outdoor wind. Consequently, the stronger is the outdoor wind, the smaller is the effective opening of the window for ventilation, and vice versa.

The invention belongs to the technical field of production of blast furnaces and in particular discloses a blowing-in and charging method of the blast furnace. The blowing-in and charging method comprises the following steps: 1) debugging each system before blowing-in of the blast furnace and preparing blowing-in furnace burdens; 2) adding empty coke into the blast furnace and filling into a partlocated below a furnace bosh and capable of forming a furnace burden softening zone; 3) conveying hot air into the blast furnace and controlling air pressure to be greater than or equal to 0.100Mpa; continually adding the empty coke into the blast furnace in an air conveying process until a material line is normal. According to the blowing-in and charging method of the blast furnace, provided by the invention, a blast furnace blowing-in method adopts a semi-charging manner and a condition that cold blowing-in furnace burdens are added into the blast furnace in one step is avoided; meanwhile, after part of the furnace burdens are pre-charged, zone air is blown and a material column can be blown to be loose through a zone air material driving line, so that on one hand, the air permeability of the material column is ensured; on the other hand, sufficient combustion of the furnace burdens is facilitated and the aim of saving the furnace burdens is realized.

The invention provides a ventilating cabinet type air conditioner indoor unit. The ventilating cabinet type air conditioner indoor unit comprises a machine shell, at least one air supplying assembly,a heat exchanger and a ventilating device, wherein the machine shell is provided with a machine shell air inlet and at least one machine shell air outlet, the at least one air supply assembly is arranged in the machine shell, the air supply assembly comprises a centrifugal fan and a volute arranged outside the centrifugal fan, and the centrifugal fan is configured to suck indoor air from the machine shell air inlet and bring the indoor air to be sent to the indoor environment again through the machine shell air outlets; the heat exchanger is arranged on an air inlet main air duct between the volute of the centrifugal fan and the machine shell air inlet, so that the entered indoor air through the machine shell air inlet is subjected to heat exchange with the heat exchanger; and the ventilating device is arranged below the air supply assembly, and comprises an air inlet module and a fan module communicating with the air inlet module, wherein the air inlet module is located at the lower part of the fan module, the at least one air supply assembly is further configured to suck at least part of outdoor fresh air discharged from the ventilating fan from the machine shell air inlet, and the outdoor fresh air is discharged from the machine shell air outlets after heat exchanging with the heat exchanger.

The invention provides a fresh air system constant air volume control method. The method comprises the steps that the current value of a motor is detected; whether the current value is larger than a preset current value is judged; if so, the duty ratio of a supply circuit of the motor is decreased so as to decrease the current value; and if not, the duty ratio of the supply circuit of the motor isincreased so as to increase the current value. According to the method and the system, the duty ratio is adjusted by detecting the current of the motor, constant motor power is achieved through closed-loop control of the current, constant air volume of a draught fan is achieved by remaining constant motor power, the situation that the air volume in a user's home is too high or too low is avoided,and relatively stable air volume is achieved.

The invention relates to a FA201B carding machine dust collection method. The FA201B carding machine safe stripper area triangular space, flat strips, and licker-in degassing four absorption points are connected to concourse tube by spring tube. Three or four FA201B carding machines are formed one set. Droppings and dust are continuously absorbed to filter equipment. The droppings under the machine are intermittently absorbed into fiber compactor by uphill line pipeline. The invention is upper machine continuous absorption and under machine intermittent absorption method. It can reduce energy consumption, simplify structure, and economize material cost.

The invention relates to the field of fans, in particular to an air pipe and a fan system. The air pipe comprises a first pipe body and a second pipe body, which communicate with each other and are non-collinear. Gas passes through the first pipe body and the second pipe body in sequence; and as the connecting place of the first pipe body and the second pipe body forms a certain angle, in order toprevent the phenomenon of swirls, energy loss and exhaust pressure difference, a guide plate is arranged in the communicating place of the second pipe body and the first pipe body for removing the swirls and turbulent currents caused by the angle when the gas flows from the first pipe body to the second pipe body, and the gas transmission efficiency is improved. The invention further provides thefan system; and the fan system comprises a centrifugal ventilator and the air pipe. An exhaust port of the air pipe communicates with the centrifugal ventilator for providing stable and uniform air volume to the centrifugal ventilator. The fan system is high in working efficiency and low in energy loss.

The invention discloses an air conditioner indoor unit air duct structure and an air conditioner. The air conditioner indoor unit air duct structure comprises an air inlet part, an air exchange part,an air outlet part, a base and an air conditioner shell, in the case of the base, the base is mounted on the inner wall of the air conditioner shell, in the case of the air inlet part, the air inlet part is located above the air conditioner shell, in the case of the air exchange part, the air exchange part comprises a cross-flow fan and a heat exchanger, the cross-flow fan is located in the middleof the air conditioner shell, the heat exchanger is located above the cross-flow fan, in the case of the air outlet part, the air outlet part comprises a volute, a volute tongue body and an air deflector, the volute and the volute tongue body are fixed on the base, moreover, the volute is located on the left side of the lower portion of the cross-flow fan, and a volute end is arranged at the position, closest to the cross-flow fan, of the volute. According to the provided air conditioner indoor unit air duct structure and air conditioner, the air conditioner indoor unit air duct structure issimple, the noise of the air conditioner can be remarkably reduced, the air sound quality is improved, and obvious gasp sound does not appear.

The invention relates to an ion fan. The ion fan comprises a fan, a filtering mechanism and ion emission mechanisms, wherein the fan is a centrifugal fan; the filtering mechanism is arranged on an air flow passage of the centrifugal fan to filter air entering the centrifugal fan; the ion emission mechanisms are arranged on the air flow passage of the centrifugal fan and are positioned at the downstream of the filtering mechanism so as to perform ionization on the filtered air. The ion fan is characterized in that the air output is very stable, so that the destaticizing efficiency can be ensured.

The invention relates to a cyclone scrubber, which is provided with a tower body, wherein the tower body is provided with a waste gas inlet and a purified gas outlet; a cyclone area and a spray area arranged above the cyclone area are arranged in the tower body; a cyclone generator is arranged in the cyclone area; the spray area is provided with a sieve plate layer provided with a plurality of sieve pores, and a spray device arranged above the sieve plate layer; and the waste gas enters the tower body through the waste gas inlet, passes through the cyclone area and the spray area in turn, and is discharged through the purified gas outlet. The service cycle of circulating water is long, and a risk that the adsorption capacity of active carbon is quickly reduced progressively is avoided; the differential pressure at the inlet and the outlet is small, and the wind amount is stable; waste or harmful waste is hardly generated or absent basically; the cyclone scrubber is safe, easy and convenient to use; the equipment is convenient to maintain and manage; and compared with that of active carbon, the operating cost is lower.