233 results about "Wind circulation" patented technology

An integrated wind power generator is a device that integrates the functions of a wind turbine and a generator. In the main part of the induced structural component are located the induction circuits, the core and the coil, and in the motor-inducer component, the blades supports and the induction poles are placed. When wind circulation occurs, the energy acting on the blades causes the motor-inducer component to rotate around the induced structural component generating a rotating magnetic field inducing an EMF in the induction circuits. Electricity is generated in the induction circuits through only one device, functionally inseparable, in which both motor and generator functions are integrated.

The invention provides an aluminum alloy heating furnace and a heat treatment furnace. The heating furnace comprises heaters, circulating fans and fan motors, wherein the heaters are arranged at both sides of the top of the heating furnace, and are used for heating a furnace hearth of the heating furnace with different temperatures; the circulating fans are symmetrically arranged at both sides of the center line of the furnace top along the length direction of the heating furnace, and each circulating fan is provided with a fan motor; and each fan motor adopts a frequency converter to regulate speed, is used for driving each circulating fan to work, and enables each circulating fan to carry out wind circulation on the furnace hearth with different wind speeds. The heat treatment furnace comprises the heating furnace and a quenching device. The aluminum alloy heating furnace has wider temperature work range and favorable uniformity of furnace temperature, and satisfies the technical requirements of heating, annealing, quenching and aging treatment of aluminum alloy. Therefore, the heating furnace has multiple functions without separation manufacture of the aluminum alloy heating furnace and the heat treatment furnace, and saves the investment cost and the occupied area of huge equipment.

The invention provides a tunnel forepoling air circulating drilling construction method. The construction steps are as follows: a driller is firstly installed and is moved to the appointed hole position along a track, according to the tunnel position line, the position angle of the driller is adjusted to ensure that the driller is parallel with the tunnel position line, the driller is fastened with a frame; an air compressor is turned on, the wind pressure is controlled above 0.4MPa, and then the driller is turned on to ensure that a drill pipe drills towards the earth at a constant speed, the compressed air is sent to an aiguille part through an internal cavity of the drill pipe and air-cools the aiguille, drilling cuttings are blown out of the drill hole from the gap between the drill pipe and the earth; the inner part of the aiguille is provided with a guide drilling device; finally, the hole drilling is finished and the grout is cast, the grout is cast into the inner cavity of the drill pipe by a casting pipe, the grout is filled into the inner cavity of the drill pipe and the ring-shaped gap out of the drill pipe, and the next hole position is turned to construct. The tunnel forepoling air circulating drilling construction method solves the problems of low security and slow drilling of the earth layer, especially the fourth new loess area pipe roofing timbering construction, can avoid the landslide and minimize the potential safety hazard.

The invention relates to a wind cold refrigerator and a method for feeding wind with top cover, wherein said method comprises: using force wind cycle refrigerating system to flow cold wind in refrigerator to cool food; the invention is characterized in that: the wind open is arranged on the top cover of refrigerator; the reflux open is on the bottom wall to feed the cold wind from down to up to the cold room. The inventive refrigerator is characterized in that: the wind open is on the top cover; the reflux open is on the bottom wall. The invention can force the air cooled by vaporized into the cold room, to be blown into cold room from up to down, to obtain high cooling speed, better cooling effect, and high efficiency.

The invention belongs to the technical field of agricultural product processing, and particularly to a gas percussion hot wind and vacuum pulsating vacuum combination drying method and device. The gas percussion hot wind and vacuum pulsating vacuum combination drying method and the device comprises a dry engine body, a pulsating vacuum generator system, a pneumatic percussion drying system, a vacuum heating system and automatic control system and other parts. A hot wind drying stage of the gas percussion hot wind and vacuum pulsating vacuum combination drying method is adopted with an air-impingement technology and a humidity control dehumidification technology, and a vacuum drying stage is adopted with a vacuum pulsating drying technology. The gas percussion hot wind and vacuum pulsating vacuum combination drying method solves the problems that the hot wind drying stage of hot wind circulation in the existing hot wind vacuum combination drying technology is not scientific, exhaust emission is not reasonable, heat convection heat transfer effect is poor and pressure operation mode of vacuum drying stage is easy to influence the drying efficiency and so on, and improves the processing efficiency of hot air vacuum combination drying technology and reduces the energy consumption.

The invention belongs to the technical field of highway engineering machines and in particular relates to a hot wind layered heating type re-stirring locomotive. The hot wind layered heating type re-stirring locomotive comprises a stander supported by bearing wheels, wherein a new material receiving hopper is arranged at the front end of the stander; a scraper blade lifting device and a stirring jar are arranged on the stander; a weighing measuring hopper is arranged at the upper end of the scraper blade lifting device; a feeding opening of the stirring jar is positioned below the weighing measuring hopper; a hot material vertical lifting device and a hot wind circulation heating device are arranged in the middle of the stander; the upper part of the vertical lifting device is provided with a discharge opening; the lower part of the hot wind circulation heating device is provided with a conveying plate chain; and the discharge opening is formed towards one side of a feeding end of the surface of the conveying plate chain. By utilizing the hot wind layered heating type re-stirring locomotive, a new-old asphalt mixture can be sufficiently and uniformly heated, the material distribution is layered and uniform, the stirring temperature is sufficient and uniform finally, a new mixture with the stable temperature is obtained, and the stable quality of a new pavement is ensured.

The invention discloses an FPGA-based wet umbrella rapid and automatic drying machine and a control method thereof. The drying machine comprises a cylindrical drum. An umbrella rotating device is arranged at the bottom of the drum. A humidity collection module is arranged on the inner side wall of the drum. The top and bottom of the side wall of the drum are communicated with a hot wind circulation system. The umbrella rotating device, the humidity collection module and the hot wind circulation system are all connected to an FPGA control center. The umbrella rotating device comprises a vertically arranged first rotary shaft connected with a servo motor. The FPGA control center controls the servo motor to drive an umbrella to rotate through the first rotary shaft. According to the FPGA-based wet umbrella rapid and automatic drying machine and the control method thereof, humidity sensors inside the drying machine collect humidity of each portion; the humidity weight is worked out through an RBF algorithm; and then the FPGA control center controls the rotation speed of the servo motor, a pulsed electric field and synchronous working of the hot wind circulation system according to the humidity weight. Therefore, the effect of rapidly drying the wet umbrella is achieved.

The invention belongs to the technical filed of glass ceramic annealing by a sintering method, and discloses an annealing and cooling treatment system for two-stage hot wind circulation of a glass ceramic tunnel crystallization kiln. The treatment system is characterized in that the upper part and the lower part of kiln walls at two sides of a quench zone are respectively installed with a row of fast cold wind blowing openings which are communicated with fast cold wind blowing opening branch pipes, the fast cold wind blowing openings are all communicated with the output ports of second hot wind circulation pipes; the kiln walls at two sides of the slow cooling segment of a cooling zone are respectively provided with three rows of hot circulation wind blowing openings which are communicated with the hot circulation wind blowing opening branch pipes, all hot circulation wind blowing opening branch pipes are communicated with the output ports of first hot wind circulation pipes; the first hot circulation wind suction opening blowing branch pipes are all communicated with the input ports of the first hot wind circulation pipes; and the second hot circulation wind suction opening blowing branch pipes are all communicated with the input ports of the second hot wind circulation pipes. The annealing and cooling treatment system can improve product quality, and reduce deformation, burst and other defects of the products.

The invention belongs to the field of experiment box, and discloses a walk-in sample stability test box comprising a sealed box and auxiliary devices outside the box. The sealed box is a walk-in box. A temperature and humidity control system, a humidification air jet pipe, a high-power dehumidifier, a small-power dehumidifier, a cooling coil, an electric heating pipe, a temperature and humidity sensor, a set of processing wind uniform distribution system, a plurality of air-supply circulation fans, and the like are arranged in the sealed box. The functional parts are respectively connected with the temperature and humidity control system, and control the on / off and variable output during a process. An electrode humidifier and a water chiller unit are provided for the auxiliary devices outside the box. Through a PID regulator in the temperature and humidity control system, temperature and humidity can be accurately regulated. The invention aims at providing the walk-in sample stability test box with large volume, high temperature and humidity regulation precision, good temperature and humidity uniformity, and ultra-low energy consumption.

A heat insulation recycling transport vehicle for hot air circulation asphalt mixture comprises a vehicle chassis, an asphalt mixture bin, a bin lifting mechanism, an excess material recycling transport mechanism, a follow charging hopper and an electric control device. The asphalt mixture bin is a tipper-hopper discharge type hot air circulation heating heat insulation bin mechanism, the heat insulation bin mechanism comprises a flipping frame, a heat insulation bin, a hot air circulation furnace device and a generator set, a feeding hopper is arranged on the heat insulation bin and is in butt joint with the follow charging hopper, the heat insulation bin comprises a heat insulation box, a bottom hot air channel, a tail hot air channel, two side wall hot air channels, two groups of spoilers and an inner bin, and the hot air circulation furnace device comprises a diesel tank, a diesel supply device, a hot air furnace and a high-temperature circulation fan. The heat insulation recycling transport vehicle has the advantages that heating is quick and uniform, the heat efficiency is high, hot air with waste heat can be recycled, loading transport heat insulation effects are fine, and the best laying temperature and quality of the asphalt mixture are constantly ensured.

The invention discloses a subway station wind-water linkage energy-saving optimization method. According to the method, an equipment management room ventilation and air conditioning system is called as a small system, a station public area ventilation and air conditioning system is called as a large system, and the optimization method comprises the following steps that the working conditions of the large and small systems are automatically controlled, and specifically, a control scheme is made for the working conditions of the systems according to enthalpy value temperatures of the large and small systems in different time periods; the temperature of the large and small systems is automatically controlled, and specifically, a control scheme is made for equipment comprising variable frequency fans in the systems according to temperature changes of the large and small systems in different seasons; a water system is controlled, and specifically, a control scheme is made for equipment comprising a water system water chilling unit, a variable frequency pump and an electric butterfly valve. According to the subway station wind-water linkage energy-saving optimization method, the stationlarge system is located in a specified temperature range through large system wind circulation, meanwhile, the chilled water frequency and the cooling water frequency are adjusted, the water chillingunit is located in a reasonable working condition, safe and efficient operation of the water chilling system is guaranteed, and system energy consumption is reduced.

The invention discloses a wind circulation intelligent thawing-in refrigerator and relates to the field of a household appliance. For a conventional household refrigerator, rapid thawing of foods influences taste and causes nutrition loss and manual operation needs to be carried out to thaw in foods in a refrigerating chamber. The wind circulation intelligent thawing-in refrigerator utilizes a singlechip control technology and a wind circulation technology to implement reservation thawing and comprises a plurality of insulated freezing chambers and refrigerating chambers which are independent in temperature control; the refrigerating chambers and the freezing chambers are connected by air inlet pipelines and air return pipelines; electromagnetic valves and air pumps are mounted on the air inlet pipelines and the air return pipelines; a singlechip system controls the electromagnetic valves and the air pumps; circulating air carries heat of the refrigerating chambers to slowly flow into the freezing chambers; slow and automatic thawing of frozen foods is completed in appointment time set by a user; nutrition and taste of foods are kept to the greatest extent. Meanwhile, the design of a plurality of independent insulated freezing chambers is adopted and cold of the freezing chambers slowly flows into the refrigerating chambers, therefore, compared with the existing refrigerator, the wind circulation intelligent thawing-in refrigerator saves electric energy.

The invention relates to the field of air conditioners, in particular to an integral type indoor unit of a radiation air-conditioning system. The integral type indoor unit comprises a main frame, a water circulation system, a wind circulation system and a control system. The water circulation system, the wind circulation system and the control system are all arranged on the main frame, and the water circulation system and the wind circulation system are both connected with the control system. The water circulation device and the air circulation device are integrated through the main frame and can be in butt joint with various outdoor units, so that the overall device configuration of the radiation air-conditioning system is simplified, and the common problems that when a fresh air processing device and a water circulation device are independently configured in the prior art, performance of the devices is not matched, device model selecting is complex, occupied space is large, and specialization debugging is needed are solved; the structure is simple, and the system universality and stability are improved. Integral control is convenient, flexible, more accurate and rapider; device operation is stable and smooth; operation performance is superior; the energy-saving effect is better; conveying is easy; installation is fast; workers can carry the integral type indoor unit conveniently in the construction process.

The invention provides a heat pump type double-circulation hot-air drying system and a control method thereof, and relates to supply or control devices for air or gas used for drying solid materials or products, in particular to a heat pump type hot-air drying system and a control method for the system. A hot air cabinet is divided into a basic air temperature area and a reheating area. A latent heat condenser and a sensible heat condenser are connected in series to form a double-section series condenser. An air supply circulation loop enters an air feeder from a drying chamber through an air return duct and the latent heat condenser and is supplied into the drying chamber through an air supply regulating valve, the sensible heat condenser and an air supply duct. An internal circulation loop returns to the air feeder from the air feeder through an internal circulation air valve, an internal circulation air duct, the air return duct and the latent heat condenser. By controlling the opening degrees of the internal circulation air valve and the air supply regulating valve, the internal circulation loop sufficiently absorbs condensation latent heat to increase the basic air temperature, secondary heat exchange is conducted through the air supply circulation loop for producing high-temperature hot air, and thus variation requirements of the outlet air temperature and the temperature of the drying chamber are met; and the heating efficiency of the system is high, and the product operating condition is stable.

The invention discloses an efficient energy-saving bamboo shoot drying device with an automatic feeding function. The efficient energy-saving bamboo shoot drying device comprises a baking box and a drying box body. A drying chamber is arranged in the drying box body. A pit is arranged in the lower end of the drying box body. A guide rail is arranged on the inner side wall of the pit and the inner side wall of the drying chamber. The guide rail is provided with a lifting frame mechanism. An electrical lifting pull rod is arranged at the bottom of the lifting frame mechanism. Feeding ports are formed in the front side and back side of the bottom and the right side face of the drying box body. An automatic feeding mechanism is arranged in the position of the feeding port in the right side face of the drying box body. A pushing mechanism is arranged in the position of the feeding port in the front side of the drying box body. A suction fan is arranged at the upper left end of the drying box body. An air blower is arranged at the lower left end of the drying box body. The efficient energy-saving bamboo shoot drying device with the automatic feeding function is convenient to use, capable of achieving automatic feeding and discharging and saving the labor cost, short in drying cycle, high in drying efficiency, and good in drying effect, hot wind circulation is adopted, a preheating function can be sufficiently utilized for drying, and thus energy is saved.

The invention relates to an air-conditioning bed which consists of a plenum chamber, an air-conditioner box (2), a breathable mattress (3) and a headboard (4), wherein a mechanical cooling system is mounted in the air-conditioner box (2); due to the adoption of the special structural design inside the air-conditioner box (2), and in combination with a unique temperature regulation method, during cooling in summer, the temperature of cold air blown out from the bed surface can be randomly regulated and controlled within the range of the temperature lower than the environment temperature by 1-14 DEG C under the condition that air volume of the cold air is lower than the designed rated air volume, therefore, a user can randomly regulate the temperature and amount of the air blown out from the bed surface and according to requirements; and during heating in winter, the bed surface is heated through internal air circulation of the bed to achieve the purpose of heating. According to the invention, due to the adoption of the modular design, the air-conditioning bed is compact in structure, and convenient to carry and install, and due to the adoption of effective noise reducing measures in structural design, the air-conditioning bed is very quiet during sleeping of the user.

The invention relates to a hot air cycle heater of pitch road, which comprises a front heater, a back heater, a hot air furnace, a combustion fan, a high-temperature cycle fan, a control system, and a burner, wherein the front and back heaters via the driving device are connected to the frame; the burner is at the air inlet of hot air furnace; the combustion fan and the high-temperature cycle fan are parallel between the air inlet and air outlet of hot air furnace; the air outlet of hot air furnace via the air tube is connected to the front and back heaters; the air inlet of high-temperature cycle fan via the air tube is connected to the hot air furnace; the air outlet via the air tube is connected to the front and back heaters. The invention can burn light diesel to heat air and guide it into certain speed, to heat several road sections at the same time, and it can recycle hot air.

The invention relates to an organic waste gas catalytic combustion device. The organic waste gas catalytic combustion device comprises a waste gas inlet, a purified gas outlet, a catalytic purification device, a hot start wind circulation pipe and an electrical control device, wherein the waste gas inlet is used for inputting the waste gas; the purified gas outlet is used for outputting the purified gas; the catalytic purification device is used for performing catalytic combustion on the waste gas; the waste gas inlet is communicated with the catalytic purification device through a first pipeline; the purified gas outlet is communicated with the catalytic purification device through a second pipeline; the two ends of the hot start wind circulation pipe are communicated with the first pipeline and the second pipeline respectively; the second pipeline is connected with a fan; and the first pipeline, the catalytic purification device, the second pipeline, the hot start wind circulation pipe and the fan form a circulation path. The organic waste gas catalytic combustion device has the advantages of high self-control degree, available waste heat, stable performance, safety, reliability, small volume, light weight, simpleness and convenience in operation, good purifying effect and the like.

The invention provides a baking box for automobile accessories. The baking box comprises a box body, a box door, a box door handle, a toughened glass observation window, sliding wheel supporting feet, a heater and a wind circulation device. The baking box further comprises a parameter adjusting device, a temperature display panel, an alarm lamp, a time display panel, a temperature control device and an alarm device. The temperature control device is connected with a sensor and the alarm device and is used for controlling the temperature in the box body, wherein the sensor and the alarm device are arranged in the box body. When the temperature in the box body is deviated from the preset value, the alarm device gives out an alarm, and the alarm lamp flickers. The parameter adjusting device is used for adjusting the preset temperature and setting time. According to the baking box for the automobile accessories, the alarm device can find out deviation between the actual temperature in the box body and the preset temperature timely, working personnel adjusts the temperature quickly, and the constant temperature in the box body is guaranteed, so that decline of product quality caused by excessively higher or excessively low temperature in the box body is avoided, the production rate is increased, and the cost is saved.

The invention discloses a combined refrigerator and a control method thereof, and belongs to the technical field of refrigerator design. The combined refrigerator comprises at least one modular refrigerator body, each modular refrigerator body comprises a refrigeration module, a top cover and a functional module, wherein the refrigeration module comprises a refrigerant circulation composed of a compressor, an anti-condensing pipe, a condenser and an evaporator; wind channels between the functional modules and the refrigeration modules are made to communicate, fans are installed in the wind channels, and thus the wind circulation of the refrigerator bodies is increased. According to the combined refrigerator and the control method thereof, the refrigerator bodies can be used alone through the refrigeration modules and can be further used by being spliced into one row or multiple rows through detachable connecting structures, and diversified selection and matching requirements of different users are met; and meanwhile the refrigeration modules and the functional modules adopt standard modular design, the investment of molds and the production cost of refrigerator manufacturers are lowered, and the production efficiency is improved.

The invention relates to a cooler of broadcast emitter and electric high-power element. Wherein, the outdoor machine is outside the room, and the indoor machine is inside the frame of television and broadcast emitter; the upper wind open of vaporizer of indoor machine is connected to the bottom support of power amplifier of emitter; the coolant outlet of vaporizer is connected to the gas reflux tube of outdoor machine and connected to the liquid outlet tube of outdoor machine; the ventilating valve is at the top of power amplifier; the condense water of vaporizer and the water outlet tube are in the outdoor condition A. the invention can use circulated wind to cool inside the frame or use natural wind.

The invention discloses a novel U-shaped fin tube heat exchanger and a fixing mode thereof. A common U-shaped fin tube heat exchanger is designed into a horizontal U-shaped heat exchanger with an upward opening, a gas collecting tube assembly is horizontally arranged, the gas collecting tube assembly and a dispenser assembly are respectively assembled outside one side of the fin tube heat exchanger, and an end plate I and an end plate II are respectively shaped into a U-shaped structure. The invention has the advantages of ensuring that pressure drops of refrigerants of all refrigerant loops are consistent and wind circulation of each refrigerating system is more uniform, effectively solving the problem of nonuniform defrosting of heat exchangers adopting other fixing modes, and reducing the height of the whole set because an outdoor condensing fan blade and a motor are installed in a space in the U-shaped fin tube heat exchanger.

The invention relates to a plastic particle winnowing and classifying device based on a variable-frequency speed-regulating fan and belongs to the field of environmental protection. The plastic particle winnowing and classifying device comprises a particle feeding opening, a fan device and other components. The particle feeding opening is connected with a density winnowing and classifying device, the density winnowing and classifying device is connected with a soot cleaning water curtain and a conveyor belt of matters of various densities correspondingly, the conveyor belt of the various matters is connected with a single-matter collection slot, the soot cleaning water curtain is connected with a wet wind drying device, the wet wind drying device is connected with a wind circulation system, the wind circulation system is connected with the fan device, the fan device is connected with the density winnowing and classifying device, and a power source is connected with the fan device, the particle feeding opening and the conveyor belts of the matters of various densities correspondingly. By means of the plastic particle winnowing and classifying device, the mixed matters can be effectively classified, winnowing and classifying are performed based on difference in the particle densities, design is simple, environmentally friendly and efficient, a great role is played on classification of the plastic particles, and certain contribution can be made to environmental protection.

The invention relates to an improved energy-saving and emission reduction technology of a ceramic kiln, in particular to an energy-saving hot wind circulation tunnel kiln and a waste heat recycling method of the tunnel kiln. The energy-saving hot wind circulation tunnel kiln comprises a base, a lateral wall and a heat-preservation shell, is sequentially divided into a preheating section, a smoke exhausting section, a sintering section, a quenching section and a cooling section from an inlet to an outlet of a hearth, and further comprises a hot wind circulation system. The hot wind circulation system comprises a hot wind pipeline and a wind inducing device, wherein the hot wind pipeline enables a heat preservation passage and a cooling passage to communicate with a preheating passage, and the wind inducing device is arranged on the hot wind pipeline and used for introducing hot wind in the heat preservation passage and the cooling passage into the preheating passage. According to the energy-saving hot wind circulation tunnel kiln and the waste heat recycling method of the tunnel kiln, the structure is simple, construction is convenient, and the manufacturing cost is low. A heat circulation system is formed in the kiln, the heat utilization efficiency is improved, energy consumption is reduced, the product quality is improved, and the influence of the kiln on the surroundings is reduced.

The invention discloses a hot air circulation type indirect thermal desorption soil remediation system and method thereof, and belongs to the technical field of soil remediation. The system comprises a thermal desorption reactor, a dust remover, a hot air circulating fan, a hot air heater, an air preheater, a combustion fan, a combustion device and the like. Thermal desorption gas generated by soil heating volatilization is used as a heat transfer medium, contact type efficient heat transfer between hot air and soil is achieved in a cyclic heating mode, meanwhile, high-temperature flue gas is kept not to make direct contact with soil, and the advantages of being high in treatment capacity, small in equipment scale and the like are achieved.

INTEGRATED WIND POWER GENERATOR. It is a device that integrates the functions of a wind turbine and a generator. In the main part of the induced structural component (4) are located the induction circuits, the core and the coil (5), and in the motor-inducer component (6), the blades supports (10) and the induction poles (7) are placed. When wind circulation occurs, the energy acting on the blades causes the motor-inducer component (6) to rotate around the induced structural component (3) generating a rotating magnetic field inducing an EMF in the induction circuits. According to what it is herein described, electricity is generated in the induction circuits (5) through only one device, functionally inseparable, in which both motor and generator functions are integrated.

The invention discloses a wall surface cleaning device with a function of water-wind circulation and a working method thereof. The device comprises a driving vehicle body, wherein a vehicle frame in rear of the driving vehicle body is fixedly provided with a box body, a lifter is arranged above the box body, one side of the lifter is provided with a tensioner arranged aslant, the upper end of thelifter is hinged with a connector on the back of a cleaning cover through a rotating shaft, the inner portion of the cleaning cover is provided with a cleaning roller supported through a supporting piece and close to a front opening, the cleaning roller is driven by a power device to rotate, the surface of the cleaning roller is provided with evenly arranged blades made from a rubber material, andrubber baffles located at the front opening are arranged above and below the cleaning cover respectively. The cleaning device utilizes the lifter to adjust the height of the cleaning cover, the cleaning cover tightly abuts the wall surface through the tensioner, the cleaning roller with the blades made from the rubber material is driven by the power device to clean away the wall surface continuously, the rubber baffles can block the discharge of cleaned-away dirt, and can also ensure that the cleaning cover tightly abuts the ground, by adopting the method, the pollution and waste can be avoided, and the cleaning effect is good.

The invention relates to a central air-conditioning air circulating system. The central air-conditioning air circulating system comprises an air inlet main tube, an air return main tube and an air feeding main tube, wherein the air inlet main tube, the air feeding main tube and the air return main tube are in communication; a plurality of branch tubes are in communication on the air feeding main tube; the air return main tube is in communication with a plurality of air return tubes; heat exchange devices for gas cooling are arranged inside sides, away from the air feeding main tube, of the branch tubes; an air inlet which communicates with the indoor is formed in the air inlet main tube; a fan coiled tube for gas cooling is arranged on a position, between the air inlet and the air inlet main tube, of the air inlet main tube; a filter assembly is arranged on a position, between the fan coiled tube and the air feeding main tube, in the air inlet main tube; one side, close to the air inlet main tube, of the air return main tube communicates with an air exhaust tube which communicates with the outdoor; the fan coiled tube and the heat exchange devices are connected to refrigerating units; and flow-limiting mechanisms are arranged inside the air inlet main tube and the air exhaust tubes. The air-conditioning system disclosed by the invention can provide fresh air to the indoor during a flu period or when a virus breaks out, so that life health of staff is guaranteed.

The invention discloses a phase change electric heat storage heating system with working-condition-based PID and self-adaptive feedforward compensation and a method. The system includes a wind circulation system and a water circulation system, and the water circulation system and the wind circulation system exchange heat through a heat exchanger, and output heating hot water. The wind circulationsystem includes a frequency conversion fan (1), a lower air duct (3), a phase change regenerative furnace (4) and an upper air duct (5). A working-condition-based PID and self-adaptive feedforward compensation control strategy can control the phase change electric phase change heating system according to the working conditions of the system, the problem that when the heating system working conditions are changed, traditional single closed-loop control is difficult to adapt to dramatic changes in system parameters is solved, and the feedforward compensation can quickly suppress deviation causedby furnace temperature disturbance. When adopting the working-condition-based PID and self-adaptive feedforward compensation control strategy, a water supply temperature fluctuation range is small, and the problem that the heating control stability of the phase change heat storage heating system is not high is solved.