51results about How to "Large air supply" patented technology

The invention relates to a blowing type gas water heater constant temperature control method, which is characterized in that after the water heater is successfully ignited, a controller calculates the current thermal load Q according to the water flow V, water inflowing temperature T0, water outflowing temperature T1 set by a user, calculates and controls the air quantity S output by an air flower according to the thermal load Q, guarantees the flame not to be blown out, and causes the heater to work when the gas supply is low. The blowing type gas water heater constant temperature control system comprises a central controller, the air blower, a gas proportional valve, an igniter, a water flow sensor, a water inflowing temperature sensor and a water outflowing temperature sensor; after the igniter is successfully ignited, the controller calculates and controls the air quantity S output by the air blower according to the thermal load Q; when the real water outflowing temperature T11 is less than the set water outflowing temperature T1, the controller controls the gas proportional valve to increase the openness of the valve thereof and the air demand of the gas passage so that the real water outflowing temperature T11 reaches the set water outflowing temperature T1. The invention causes that the heater can work when the gas supply quantity is low, can rapidly recover the constant temperature state when the gas supply quantity recovers, thus being convenient for users to use.

The invention relates to a gas liquid reaction kettle adopting a spherical crown-shaped micropore corundum gas supply apparatus. The gas liquid reaction kettle comprises a reaction kettle body and a gas supply device, the reaction kettle body comprises a main kettle body, the gas supply device comprises the gas supply apparatus, the gas supply apparatus is arranged in the main kettle body, and thetop surface of the gas supply apparatus is a spherical surface; the gas supply apparatus is in a spherical crown shape and is of an integrated structure, and upper and lower surfaces of the gas supply apparatus release gas simultaneously; the gas liquid reaction kettle has the advantages of a large gas supply amount, high stirring intensity, low resistance, high efficiency, low consumption, reliable operation, no blockage, ageing resistance, corrosion resistance, long service life and the like; in addition, the superficial area of contact between gas and liquid is greatly increased through alarge number of fine bubbles, the reaction speed is increased, and the reaction efficiency is improved; in addition, during gas supply, a high self-stirring effect of a large number of small bubbles is achieved, a stirring device of a conventional gas liquid reaction kettle does not need to be arranged, the structure can be simplified, the cost is reduced, and if the stirring device is arranged, the speed and efficiency of a gas liquid reaction can be further improved.

The invention relates a bubble-typed pound automatic aerator, which comprises a motor, flexible tubes and an air pump. The air pump comprises a tube-shaped cylinder and a tube-shaped piston arranged in the cylinder. The tube-shaped cylinder is opened with a gap at one end, and the other end is sealed, an air outlet is opened at the sealed end, and an air outlet valve is arranged on the air outlet. The air outlet is connected with a main flexible tube by an air outlet tube, and the main flexible tube is also connected with a branch organ, a plurality of branch flexible tubes are connected on the branch organ, a shower-shaped nozzle is connected with the end part of the branch flexible tube, and a dobber is tied on the nozzle. The bubble-typed pound automatic aerator is characterized by large amount of supplied air, even distribution of the amount of air, low energy consumption, etc. By the reciprocated movement of the piston, fresh air can be sent to water continually. Meanwhile, the nozzle thereof is placed at the water bottom, thus many small bubbles can be produced, and the bubbles can combine with water fast and closely and dissolve in water, therefore, fast oxygenation can be offered to the rearing ponds, and fishes can obtain continuous enough oxygen.

The invention provides a wind-energy oxygen supply type countryside life sewage processing device. The device is characterized in that a contacting oxidation pond comprises a pond body, a padding layer is arranged in the pond body, and a micro-hole aerator is arranged below the padding layer and is connected with a wind-energy oxygen supply machine through an air pipeline. According to the device, wind-energy oxygen supply technology and sewage biology membrane method processing technology are utilized, wind-energy oxygen supply type countryside sewage processing technology is developed, a corresponding device is constructed and is used for countryside life sewage processing, and therefore the improvement of the countryside ecology environment is provided with economic and effective technology support. The device gives full play to no energy consumption characteristic of the wind-energy oxygen supply technology and easy management of the biology membrane method processing technology, realizes organic integration of the energy saving and consumption reducing technology and pollution emission reduction technology, has the advantages of being free of power consumption, high in processing efficiency, convenient to manage, simple in operation, small in occupied area, and the like, and meeting requirements of countryside life for processing sewage.

The invention relates to the technical field of mechanical transmission supercharger, in particular to a planetary gear transmission supercharger, which comprises a shell, a belt pulley, a shell cover and a pressure impeller. The belt pulley is connected to the left side of the shell, the shell cover is connected to the right side of the shell, the pressure impeller is mounted in a cavity of the shell cover, a planetary gear, a sun gear, an inner gear and a support shaft are disposed in the shell, and the inner gear is connected onto the periphery of the inner wall of the shell via a shell inner ring. A planetary gear transmission geared-up mechanism is used for replacing a traditional turbocharger, the speed of the planetary gear transmission supercharge is dominant, simultaneously, sluggish of the turbocharger is eliminated, when an engine starts or runs at low speed, the supercharger can be prompted to provide large supercharge ratio and gas supply quantity so as to meet the requirement that high torque is generated when the engine runs at low speed, and performances of the engine are greatly improved.

The invention discloses a filling limiting cylinder valve which comprises a valve body, a valve element and a first spring, wherein a sliding sleeve capable of doing reciprocating motions in a way of facing to the valve element and a plug screw used for mounting the sliding sleeve into a clamping seat are mounted in the clamping seat on a side wall of the valve body, the plug screw is provided with an iron core extending into the sliding sleeve and used for driving the sliding sleeve through magnetic force to slide to the valve element, the exterior of the sliding sleeve is provided with a second spring used for keeping a tendency that the sliding sleeve slides away from the valve element, a step hole is formed in a runner, a cone part capable of blocking the stepped hole to seal the runner when the valve element moves downward is formed in the valve element, and the sliding sleeve and the valve element are arranged to be that the sliding sleeve stops the valve element moving downward when the sliding sleeve slides to the valve element. Since the filling limiting cylinder valve provided by the invention is arranged to be that the valve element moves downward to close the runner of the cylinder valve, the requirements of relatively great air demand and inflating volume of an electromagnetic filling limiting cylinder valve can be met completely. When the valve element moves downward, all that is needed is to overcome the elastic force of the first spring, and the reliability and the stability of the work of the valve element are ensured.

The invention provides a portable air cleaner, aims to solve the problem that the conventional respirators are single in function and unpractical, and relates to the technical field of air purification. The portable air cleaner comprises a cleaning main frame and a respiration nasal mask, wherein the cleaning main frame and the respiration nasal mask are connected through a flexible duct; the interior of the cleaning main frame is divided into a pressure-boost filter cavity, a primary air storage cavity and a secondary air storage cavity; a filter and a booster pump are arranged in the pressure-boost filter cavity; a negative ion generator is arranged in the primary air storage cavity; and a refrigeration and heating device, a pressure sensor and a temperature sensor are arranged in the secondary air storage cavity. The portable air cleaner has the advantages of simple structure, small size and portability; a jet pump is arranged in the cleaner to achieve positive-pressure air supply, the air supply volume is large, and the air cleaner can meet the use requirement of a user in exercise; the negative ion generator and the refrigeration and heating device arranged in the air cleaner can further improve the air quality; and further, a display screen can display the key parameters such as the flow rate, the air pressure, the temperature, the residual electric quantity and the like, and has a warning function, so that the user can operate accurately and use the air cleaner safely.

The invention discloses a mobile LNG (Liquefied Natural Gas) supply device utilizing residual heat and waste heat. The mobile LNG supply device comprises an LNG storage device and a vehicle-mounted vaporization pressure adjusting container, wherein a regenerative vaporizer is arranged in the vehicle-mounted vaporization pressure adjusting container; a first heat exchange pipe and a second heat exchange pipe are arranged inside the regenerative vaporizer; the inlets and outlets of the first heat exchange pipe and the second heat exchange pipe are formed in one pipe plate; end sockets at the two ends of the first heat exchange pipe and the second heat exchange pipe are partitioned into two chambers; the LNG storage device is connected with the regenerative vaporizer through a pipe. According to the mobile LNG supply device, externally connected power source or other power sources are not needed when gas is supplied; the LNG is vaporized through the residual heat and waste heat recycled by the regenerative vaporizer, the environment impact on a vaporization amount is extremely small, the gas supply amount of the device is large and the vaporization speed is fast; meanwhile, an electric control cabinet and a safety device are arranged so as to ensure the safety and reliability of gas supply; the mobile LNG supply device has the characteristic of being compact in structure, convenient to move, energy-saving and environment-friendly, fast in starting speed, strong in gas supply capability and environmental adaptability and high in safety performance and reliability.

The invention relates to a compressor system for a CNG fueling station used for the arbitrary change of the pressure of a natural gas pipe network, which can ensure that the pressure in an air intake pipeline of the natural gas fueling station is arbitrarily changed, the gas supply is stable, and a motor is not overloaded, and serves the function of energy conservation; in addition, a conventional station is compatible with a sub station, so as to solve the problem of insufficient gas supply in winter and summer. The invention adopts the technical proposal that the number of operation stages of a compressor is controlled according to type spectrograms; when the natural gas pressure in the pipeline is 0.15 MPa to 0.7 MPa, the compressor adopts four-stage compression; when the natural gas pressure in the pipeline is 0.8 MPa to 2.5 MPa, the compressor adopts three-stage compression; when the natural gas pressure in the pipeline is 2.5 MPa to 6.5 MPa, the compressor adopts two-stage compression; and when the pressure in the pipeline is larger than 6.5 MPa, the compressor adopts one-stage compression.

The invention relates to an air suspension centrifugal blower which comprises a motor, a motor base, a flow guide opening, an air outlet, turbines and volutes. A rotor is coaxially connected with the left turbine and the right turbine through a rotor mandrel. A left radial bearing component and a right radial bearing component are disposed in a motor shell. Each radial bearing component comprises a radial bearing block, a radial bearing, a journal and a radial bearing gland, wherein the radial bearing is a foil piece type dynamic pressure gas radial bearing. An inner thrust bearing block, an outer thrust bearing block and a thrust plate are disposed on the right side in the motor shell. An inner thrust bearing is disposed between the inner thrust bearing block and the thrust plate. An outer thrust bearing is disposed between the thrust plate and the outer thrust bearing block. The inner thrust bearing and the outer thrust bearing are foil piece type dynamic pressure gas thrust bearings. The air suspension centrifugal blower has the advantages that the foil piece type dynamic pressure gas radial bearing and thrust bearings are used, the blower is good in high-speed stability, high in bearing capacity, good in lubrication performance, high temperature resistant and long in service, no external gas sources are needed, blower efficiency is increased, and energy consumption and noise pollution are reduced.

The invention provides a mobile emergency natural gas supply system. The mobile emergency natural gas supply system comprises a water bath type vaporizer which is arranged on a skid-mounted vehicle, an ambient air vaporizer, a first liquefied natural gas inlet pipeline, a second liquefied natural gas inlet pipeline, a first gaseous natural gas outlet pipeline and a second gaseous natural gas outlet pipeline; the first liquefied natural gas inlet pipeline is connected with a liquid phase inlet end of the ambient air vaporizer; the second liquefied natural gas inlet pipeline and the second gaseous natural gas outlet pipeline are respectively connected with a fluid phase inlet end and a gaseous phase outlet end of the water bath type vaporizer; a gaseous phase outlet end of the ambient air vaporizer is connected with a combustor which is arranged inside the water bath type vaporizer; one end of the first gaseous natural gas outlet pipeline is connected with the gaseous phase outlet end of the water bath type vaporizer; and the other end of the first gaseous natural gas outlet pipeline is connected with the combustor which is arranged inside the water bath type vaporizer. The invention also provides a mobile emergency natural gas supply method using the mobile emergency natural gas supply system. The mobile emergency natural gas supply system and the mobile emergency natural gas supply method have the advantages of being large in gas supply capacity, high in temperature of the gaseous phase outlets, capable of achieving continuous gas supply, rapid in starting and capable of adapting to a mobile gas supply requirement.

The invention discloses a fuel cell adaptive control method based on power prediction. The method comprises the steps: carrying out the prediction according to historical data in the working process of a fuel cell system to obtain a power prediction value, and adjusting the air supply amount according to the power prediction value; when power prediction is carried out, acquiring a feature parameter vector from historical data by using a feature parameter extraction and correlation analysis method, and calculating a power prediction value by using an artificial intelligence algorithm; and if the predicted power value of the fuel cell system is larger than the real-time output power, adopting response control action in advance to improve the air supply amount. According to the method, the RBF neural network is adopted to improve the power prediction accuracy, the calculation efficiency is improved by reducing the feature parameter dimension, and the variable load response speed of the fuel cell system can be remarkably improved.

The invention belongs to the technical field of oil produced fuel gas supply, and specifically relates to an intelligent independent oil produced natural gas supply device. The intelligent independent oil produced natural gas supply device comprises an oil storage device, a two-way automatic oil inlet device, a plurality of gas producing devices, a gas outlet device, a monitoring and alarming system and a master control system. The device, compared with the prior art, has the advantage that the gas producing devices are flexibly installed, so as to meet users with different requirements for gas supply quantity; sufficient liquid fuel oil is supplied according to the requirements for gas supply quantity through cooperative application of the flow monitoring and alarming system, so that the gas producing capacity of the device is improved, the flexibility is high, independent local area network oil produced natural gas supply facilities can be formed, the whole control process can be uniformly controlled by the master control system according to the actual requirements of the users, and the device is high in intelligent level, stable in gas producing process and high in safety.

The invention relates to a circulating ventilation system of a silica sand water storage and purification tank, belongs to the technical field of environmental engineering, and provides the following technical scheme for solving the problem that purification treatment of sewage is not facilitated, the circulating ventilation system of the silica sand water storage and purification tank is technically characterized by comprising a tank body, impermeable layers are laid on the bottom wall and the side wall of the tank body, and a water storage well and a water purification well are arranged in the tank body; the water storage well and the water purification well are both defined by silica sand water filtering walls, the water purification well is communicated with a water inlet pipe, and the water storage well is communicated with a water outlet pipe. A desilting channel is further arranged in the tank body, the desilting channel is communicated with the water purification well, and the desilting channel is provided with a sludge discharge pipe; an air inlet pipe is arranged in the tank body, the two ends of the air inlet pipe extend out of the tank body, an air channel capable of supplying air to the air inlet pipe is arranged outside the tank body, and a plurality of air outlet holes are formed in the air inlet pipe located in the tank body. The circulating ventilation system has the advantages of increasing the content of dissolved oxygen in sewage and improving the sewage filtering effect.

The invention discloses a combined refrigeration system by a fuel gas combined cycle and solar power generation and a scheduling method thereof. A user adopts two ways including a centralized heat absorption type refrigerator and an air conditioner to consume electric power to refrigerate, wherein cold water is obtained by converting hot water of a fuel gas combined cycle unit through using the centralized heat absorption type refrigerator after the hot water is output and the electric power is supplied by the fuel gas combined cycle unit and a solar generator unit; under the condition of assuring the electric power supply and the refrigeration supply, and a water flow of the hot water which is supplied to the centralized heat absorption type refrigerator is reduced and is compensated by consuming the electric power to refrigerate; and a generated output is correspondingly changed and is supplied according to the change of a power load and the matching of the solar power generation. The output of the heat and the power and the change of the power load of the user are adjusted by the wave property of the solar power generation and the equal detection period and adjusting period areutilized, so that an equivalent smooth output at the user side by the solar power generation can be realized.

The invention provides an OA up-and-down partition type membrane biological reaction sewage treatment system and method. The sewage treatment system comprises a treatment tank, a filter membrane assembly, an upper-layer aeration device and a lower-layer aeration device. The upper layer of the treatment tank is an aerobic layer and the lower layer is an anaerobic layer. The aerobic layer and the anaerobic layer are arranged in an up-and-down partitioned manner, nitrogen in the sewage is converted into nitrate and nitrite through nitrobacteria treatment in the aerobic layer, and phosphorus is absorbed by bacteria. Then, the upper-layer sewage gradually enters the lower anaerobic layer to be subjected to denitrification reaction; nitrate and nitrite are converted into nitrogen through denitrification reaction, bacteria release phosphorus while denitrification is performed, free-state phosphine is in a considerable proportion in a lower-layer light shielding environment, and the nitrogen and the free-state phosphine are quickly discharged along with aeration at the bottom of the membrane pool so that the purposes of nitrogen and phosphorus removal in sewage treatment are achieved. After denitrification treatment, part of the sewage subjected to nitrogen and phosphorus removal enters a filter membrane assembly, clear water is obtained after sewage removal two-phase separation and discharged, and the remaining sewage enters the upper layer along with aeration flow to be subjected to the next circulation.

The invention belongs to the technical field of attaching strip splitting machinery, and particularly relates to a foam cotton adhesive attaching device. The foam cotton adhesive attaching device comprises a machine frame, an upper support frame, a lower support frame, an upper gas cylinder, a lower gas cylinder, a gas guide pipe, an upper scraping plate, a lower scraping plate, an adhesive tape roller, a foam cotton rolling wheel, a cutting cutter, an installing frame, a control unit and a gas supply device, wherein the gas is simultaneously supplied to the upper gas cylinder and the lower gas cylinder through the gas supply device; the simultaneous action of the upper scraping plate and the lower scraping plate can be realized; the foam cotton attaching precision is improved. By controlling the gas supply quantity of the gas supply device on the upper gas cylinder and the lower gas cylinder, the swinging angle of the upper scraping plate and the lower scraping plate is adjustable, sothat the gap between the upper scraping plate and the lower scraping plate is adjustable; the goal of producing different specifications of foam cotton is achieved; raw materials of various specifications are processed by using one kind of equipment, so that the production cost is reduced; the production efficiency is improved.

The invention relates to an animal underwater test device, which comprises an underwater test support, an underwater breathing system and a carrier platform. The underwater test bracket includes a fixed frame, a boom, a test arm, and a fixed support for animals; the underwater breathing system is connected in sequence by a compressed air tank, a ventilation pipe, and an underwater breathing mask; between two adjacent test arms, a fixed The frame is provided with a carrier platform, which can carry other scientific research equipment. The invention can not only ensure the normal breathing of test animals under water, but also the device adopts a steel body structure with high stability and strong anti-knock performance, and can withstand at least 20MPa impact pressure under water. Five compressed air tanks supply air at the same time, It allows animals to breathe underwater for a long time, and at the same time, there are many places where animals can be placed, and multiple animals can be hoisted at the same time. The device has a simple structure and a reasonable design, can be directly raised and lowered by a crane, and is suitable for being widely used in diving medical scientific research experiments such as decompression sickness and underwater impact injury.

The invention relates to the technical field of safety protection, in particular to a joint of an air supply valve of an air breathing apparatus.The joint comprises a joint body, a lower valve rack, adamping assembly and a grizzly. The joint body is of a hollow structure, two ends of which penetrate; the lower valve rack is fixed to the lower end of the joint body; the lower valve rack is of a hollow structure, two ends of which penetrate; the lower valve rack communicates to the joint body; the grizzly is fixed below the lower valve rack on the inner side of the joint body; a plurality of through holes for oxygen circulation are formed in the grizzly; and the damping assembly is fixed between the lower valve rack on the inner side of the joint body and the grizzly. According to the air supply valve of the air breathing apparatus provided by the invention, noise is reduced obviously by means of mild damping action of the damping assembly and the grizzly to a breathing air flow, so that a good noise-reducing effect is achieved. The air demand is great and the joint is simple and convenient to debug.

The invention discloses a dredging antifouling system which comprises a plurality of bubble antifouling units, and each bubble antifouling unit comprises an air compressor unit, a surge tank and a plurality of perforated aeration pipes; an air outlet of the air compressor unit is connected with an air inlet of the surge tank through an air guide pipe, an air outlet of the surge tank is connected with air inlets of the perforated aeration pipes through a plurality of flexible connecting pipes, and a plurality of aeration holes arranged in rows are formed in the outer walls of the perforated aeration pipes in the circumferential direction; the perforated aeration pipes of the plurality of bubble antifouling units are arranged around the periphery of the dredging area, and every two adjacentperforated aeration pipes are sequentially connected in series through a buckle assembly. According to the invention, the gas supply quantity can be increased, the strength of a circulating flow fieldin a dredging area is enhanced, the pressure intensity required by bubble generation can be ensured, and the bubble generation rate is improved.

The present invention and a culture method for improving the survival rate of shrimp seedlings are composed of sodium carbonate, sodium bicarbonate and ethylenediaminetetraacetic acid disodium salt (EDTA-2Na); the culture method for improving the survival rate of shrimp seedlings is calculated by weight The percentages are: 30-60% of sodium carbonate, 60-80% of sodium bicarbonate and 0-15% of disodium edetate. The invention improves the survival rate of shrimp seedlings by at least 25%, and has obvious economic benefits.

The invention relates to a control method for an air purifying device, operating an actuator, and using a control part to adjust the distance between a sealing plate and a through hole, between a first sealing member and an air intake hole, and between a communication hole connecting a casing and the air intake hole The temperature of the air entering the through hole and the dust concentration contained in the air are detected by each air temperature sensor and dust concentration sensor. The control unit calculates the detected signal value, and then adjusts the sealing plate and the through hole. The distance between the holes, the distance between the first sealing member and the air intake hole, and the distance between the communication hole connecting the casing and the air intake hole, thereby adjusting the air supply amount of the outside air entering the room. According to the present invention, in order to correspond to the calculated value of the air temperature detected by the air temperature sensor and the calculated value of the dust concentration detected by the dust concentration sensor, the distance between the sealing plate and the through hole is adjusted, thereby adjusting the amount of outside air entering the room, In addition, the distance between the communication hole connecting the housing and the air intake hole is adjusted in inverse proportion to the distance between the sealing plate and the through hole, and then the distance between the communication hole and the air intake hole is adjusted inversely proportional to the increase or decrease in the supply amount of the outside air entering the air purifier. Or increase the air supply volume of the air entering the air purifier, while maintaining the indoor temperature and reducing the pollution degree, especially, the control part calculates the signal value received from the air temperature sensor and the dust concentration sensor, and then has the ability to automatically adjust the sealing plate and Advantages of the distance between the through holes and the distance between the communication hole and the air intake hole.

The invention belongs to the technical field of attaching strip splitting machinery, and particularly relates to a foam cotton adhesive attaching device. The foam cotton adhesive attaching device comprises a machine frame, an upper support frame, a lower support frame, an upper gas cylinder, a lower gas cylinder, a gas guide pipe, an upper scraping plate, a lower scraping plate, an adhesive tape roller, a foam cotton rolling wheel, a cutting cutter, an installing frame, a control unit and a gas supply device, wherein the gas is simultaneously supplied to the upper gas cylinder and the lower gas cylinder through the gas supply device; the simultaneous action of the upper scraping plate and the lower scraping plate can be realized; the foam cotton attaching precision is improved. By controlling the gas supply quantity of the gas supply device on the upper gas cylinder and the lower gas cylinder, the swinging angle of the upper scraping plate and the lower scraping plate is adjustable, sothat the gap between the upper scraping plate and the lower scraping plate is adjustable; the goal of producing different specifications of foam cotton is achieved; raw materials of various specifications are processed by using one kind of equipment, so that the production cost is reduced; the production efficiency is improved.

The invention provides a fumigation device with an atomization function. The fumigation device comprises a device main body, a movable support arm arranged on the device main body and a fumigation assembly arranged at an end of the movable support arm, wherein a liquid medicine temporary storage mechanism and a liquid medicine heating mechanism are arranged in the device main body, the liquid medicine heating mechanism communicates with an air supply mechanism, the air supply mechanism is introduced into the fumigation assembly through the movable support arm, a reflux liquid temporary storage mechanism is arranged on the air supply mechanism, and an atomization assembly is arranged in the reflux liquid temporary storage mechanism. The reflux liquid medicine is atomized through the atomization assembly and is mixed with the liquid medicine generated by heating in order to enter a fumigation cylinder, the air supply amount in unit time is increased, and the fumigation curative effect is enhanced.

The invention relates to a device for detecting the specific surface area and the aperture of dynamic and static powder, and belongs to the technical field of powder detection. The detection device comprises a static detection part for detecting by adopting a static method; a dynamic detection component which is used for detecting by adopting a dynamic method; and a gas supply component of which the output end is respectively communicated with the static detection component and the dynamic detection component and supplies standard gas to the static detection component and the dynamic detectioncomponent. The detection device has a static detection mode and a dynamic detection mode, the corresponding detection modes can be selected according to needs, the detection cost is reduced, and thedetection accuracy is improved.

The invention discloses a ventilation air methane power generation system based on a gas storage system and a control method of the power generation system. The ventilation air methane power generation system comprises a methane generator unit, a grid-connection point, a bus and a load. The methane generator unit, the grid-connection point and the load are all connected to the bus. The bus is further connected with a reactive compensation device, the grid-connection point is provided with a power meter, and the power meter is connected with a central controller. The methane generator unit is connected with a ventilation air inlet pipeline, the ventilation air inlet pipeline, comprises an air inlet header pipe, a main ventilation air inlet pipeline body and a standby ventilation air inlet pipeline body which are communicated, the main ventilation air inlet pipeline body and the standby ventilation air inlet pipeline body are connected with one end of the air inlet header pipe, and the other end of the air inlet header pipe is connected with the methane generator unit. A normally-opened valve B is arranged between the main ventilation air inlet pipeline body and the air inlet header pipe. A normally-closed valve C is arranged between the standby ventilation air inlet pipeline body and the air inlet header pipe. The ventilation air methane power generation system further comprises a gas storage device. The ventilation air methane power generation system increases a power factor and saves energy.

The invention provides an electronic low resistance oxygen providing respirator. Signals of a pressure difference sensor are processed to drive a stepping motor. When a person breathes, the stepping motor moves in a reciprocating way. The lung respiration is realized through the connection and disconnection of an air supply pipeline. The device can greatly lower the load of respiratory muscle when the person breathes. When in normal inhalation, the biggest resistance is not larger than 200Pa, and the biggest resistance is not larger than 100Pa during exhalation. The comfort of patients can beimproved, and the oxygen inhalation efficiency is improved. The electronic low resistance oxygen providing respirator can be widely applied to hyperbaric oxygen chamber therapy, family health care, etc.