416 results about "Exhaust emission" patented technology

The invention discloses a method and system for intelligently analyzing the authenticity of motor vehicle exhaust emission inspection data, and the method comprises the steps: receiving the detection data of motor vehicle exhaust emission, obtaining multi-source detection data through the combination of the maintenance data of a vehicle and a calibration log of detection equipment, carrying out the standardization processing of the multi-source detection data, and carrying out the verification of the multi-source detection data; generating standardized multi-source detection data; wherein the detection data of motor vehicle exhaust emission comprises a vehicle VIN code, detection time, a pollutant concentration value and a detection equipment serial number; based on the standardized multi-source detection data, constructing a detection mechanism association diagram, and detecting abnormal sub-diagrams in the detection mechanism association diagram by adopting an isolated forest model to obtain a mechanism collaborative anomaly recognition result; based on the trained first neural network model, inputting target vehicle information in the standardized multi-source detection data into the first neural network model to generate a theoretical emission curve, and calculating a time warping distance between actual measurement data of a target vehicle and the theoretical emission curve to obtain a vehicle trajectory anomaly analysis result; wherein the first neural network model comprises an LSTM model and / or a pulse neural network; and generating detection data authenticity early warning information according to a mechanism cooperation abnormity identification result and the vehicle track abnormity analysis result. According to the invention, through multi-source data fusion and intelligent analysis, the authenticity behavior of the motor vehicle exhaust detection data is effectively identified.

The present invention relates to the technical field of transportation demand management and parking pricing, and specifically to a parking reservation method in the urban central business district based on dynamic pricing, comprising the following steps, S1, traffic data acquisition, S2, key value calibration, S3, perceived utility calculation, S4, parking probability measurement, and S5, pricing strategy realization. The method of reserving parking spaces in the CBD of this city is aimed at addressing the serious imbalance between the supply and demand of parking resources. To alleviate the problem of parking difficulties in urban CBD areas and appropriately increase the revenue of parking lots by dynamically adjusting parking costs. At the same time, this method greatly reduces the cruising time of vehicles when searching for parking spaces, effectively reduces fuel waste and exhaust emissions during cruising, and largely avoids traffic congestion caused by the convergence of cruising vehicles and through traffic.

The invention discloses a low-energy-consumption skid-mounted triethylene glycol dehydration tail gas zero-emission treatment device which comprises a tail gas cooling unit, a gas-liquid separation unit and a tail gas recycling unit which are connected in sequence, the gas-liquid separation unit comprises a gas-liquid separation tank, the gas-liquid separation tank is provided with a gas output pipe, and the gas output pipe is connected with the tail gas cooling unit. The tail gas recycling unit is provided with a tail gas input pipeline, the gas output pipe is communicated with the tail gas input pipeline, the tail gas input pipeline is further communicated with the power natural gas output pipeline, and an ejector is installed at the joint of the power natural gas output pipeline and the tail gas input pipeline. Tail gas and natural gas are conveyed to the rear end of the natural gas of the main pipeline. The system has the beneficial effects that regenerated tail gas after gas-liquid separation is mixed with power natural gas with pressure under the action of the ejector, and the tail gas is conveyed to the rear end of the natural gas of the main pipeline, so that the tail gas is recycled, the economic benefit is improved, zero emission of the tail gas is realized, and the environment is prevented from being polluted.

The invention relates to the technical field of tunnel monitoring, and particularly discloses a tunnel monitoring method based on machine vision, which comprises the following steps: S1, dividing sub-periods, acquiring a monitoring image at the starting point of the sub-periods, identifying a target vehicle in the monitoring image, and determining a minimum enclosing rectangle in the monitoring image; calculating a vehicle type score based on the minimum enclosing rectangle, calculating an exhaust emission index, determining a total emission amount in the sub-time period, and if the total emission amount is smaller than a total emission amount threshold value, obtaining a new total emission amount in the next sub-time period; if the total discharge amount is greater than or equal to the total discharge amount threshold value, taking the starting point of the corresponding sub-time period as an adjustment time point; s3, calculating a theoretical distance, determining a target position, and determining a target line; and when the sub-tunnel belongs to any tunnel part, adding 1 to the selection number of the sub-tunnel, determining the total selection number of the single sub-tunnel, and controlling the ventilation system based on the total selection number. The energy consumption of the ventilation system in the tunnel can be reduced.

The invention discloses a high-temperature air tightness testing device and testing method for a baseline type sealing element, and relates to the technical field of sealing element performance testing. The sliding table movement module and the friction movement module are assembled in the longitudinal area and the transverse area of the machine base respectively, the sliding table movement module is provided with a sliding table, the friction movement module is provided with a push-pull plate, displacement is controlled through a reciprocating executing mechanism, the push-pull plate fixes a friction plate, the sealing piece clamp set comprises three layers of sealing piece clamps, and the outer layer is fixed to the end of the sliding table. A first sealing groove is machined, an anti-leakage sealing piece is installed, an exhaust emission hole is further machined, a second sealing groove is machined in the middle layer, a third sealing groove is machined in the inner layer and used for installing a sealing piece to be detected, and a sealing cavity air inlet is formed in the inner layer and connected with air supply. Through cooperative work of the sliding table motion module and the friction motion module and combination of the ingenious design of the sealing element clamp set, static and dynamic leakage amount testing under different working conditions can be achieved, and richer data support is provided for research of a baseline type sealing element leakage mechanism.

The invention belongs to the field of intelligent transportation, and discloses a bus lane sharing control method based on the optimal bus speed, which comprises the following steps: S1, bus position monitoring and planning speed acquisition; s2, predicting predicted arrival time and stop time; s3, calculating the time for closing the bus lane; s4, calculating the time of reopening the bus lane; and S5, sending an instruction to the lane signal lamp. According to the method, conflicts between the buses and the social vehicles are reduced through reasonable space-time resource dynamic allocation, so that the influence on the passing efficiency of the social vehicles is reduced while the priority passing of the buses is ensured. According to the method, the passing efficiency and the punctuality rate of the bus can be improved, the reliability of a bus system is improved, the safety and smoothness of an urban traffic system can be ensured, energy consumption and tail gas emission are reduced, and meanwhile the riding experience and satisfaction degree of passengers are improved.

The invention discloses a space radiant energy collection and conversion system, which relates to the technical field of energy conversion, and comprises a motor, a main shaft, a steam turbine, an expansion machine and a synchronous generator, a clutch I and a clutch II are respectively mounted on the main shaft on the right side of the motor and the left side of the steam turbine; and a transmission I, a transmission II and a transmission III are sequentially mounted on the main shaft between the clutch I and the clutch II. According to the space radiant energy collection and conversion system, energy sources are infinite, and radiant energy in air and water is utilized and is an inexhaustible energy source; the cost is extremely low: the cost of generating one kilowatt-hour can be reduced to one minute; the system does not depend on fossil fuel, and pollution of exhaust emission to the nature is avoided.

The present invention relates to the technical field of multi-fuel generator sets, relates to a safety control system and control method for a multi-fuel electronic injection generator set, and solves the problems that the consistency between selected fuels and actually supplied fuels cannot be determined and efficient exhaust treatment cannot be guaranteed. The safety control system for a multi-fuel electronic injection generator set comprises an ECU, and a fuel oil electronic injection system and a fuel gas electronic injection system which are electrically connected to the ECU; an electronic fuel selection switch is arranged between the fuel oil electronic injection system and the fuel gas electronic injection system and the ECU; the electronic fuel selection switch is used for selecting, by means of an electronic button, the type of a fuel to be supplied and determining the consistency between the type of the selected fuel and the type of the actually supplied fuel; an exhaust emission control mechanism is arranged between the ECU and an engine; the exhaust emission control mechanism comprises a first oxygen sensor and a catalytic converter; the ECU comprises a correction unit used for improving the catalytic efficiency of the catalytic converter and having a temperature control protection function. The effects of effectively determining the consistency between selected fuels and supplied fuels and realizing high exhaust emission quality are achieved.

The invention discloses an in-cylinder combustion process and chemical reaction mechanism-based hydrogen ammonia emission generation prediction system and method, and relates to the technical field of hydrogen internal combustion engine tail gas emission control, and the system comprises an input variable acquisition module, a combustion simulation module, a chemical reaction simulation module, an emission generation prediction module and an output interface module; according to the method, a mechanism-driven multi-physics field coupling prediction system is constructed, the simplified assumption limitation of a traditional empirical model is broken through, high-precision dynamic analysis of the emission characteristics of the hydrogen-ammonia engine is achieved, in combustion process simulation, in-cylinder turbulence mixing and flame propagation details are accurately described by using a CFD model, and in-cylinder combustion simulation is achieved. The chemical reaction module can significantly improve the prediction credibility of unburned fuel residues and pollutant generation through sensitivity analysis and mechanism optimization, in addition, through real-time coupling sensor data and simulation calculation, the abnormal emission trend can be pre-judged in advance, and a feedforward control basis is provided for the ammonia injection amount, the EGR rate and the ignition angle.

The invention discloses a self-correction method for carbon deposition of a nitrogen-oxygen sensor, relates to the technical field of motor vehicle exhaust emission monitoring, and solves the problems that an existing solution for carbon deposition of the nitrogen-oxygen sensor causes irreversible damage to the nitrogen-oxygen sensor and the compensation error limitation is small. The method comprises the following steps: acquiring driving parameters and real-time NOx concentration of a vehicle, inputting the driving parameters into a constructed driving parameter-NOx concentration related neural network model to obtain predicted NOx concentration, obtaining a difference between the real-time NOx concentration and the predicted NOx concentration to obtain a NOx concentration deviation value, and calculating the NOx concentration deviation value according to the calculated NOx concentration deviation value. And a NOx concentration correction strategy is triggered according to the NOx concentration deviation value to obtain a NOx concentration correction value, and when preset engine parameter conditions are met, the fuel injection quantity is controlled according to the NOx concentration correction value. The phenomenon of insufficient combustion of the engine is reduced, the carbon deposition generation rate is reduced, and the requirement for frequent disassembly and cleaning of the sensor due to carbon deposition failure is avoided.

The invention provides a vehicle OBD-based emission monitoring system, and relates to the technical field of vehicle exhaust emission monitoring, the vehicle OBD-based emission monitoring system comprises an OBD vehicle-mounted terminal and a cloud server, the OBD vehicle-mounted terminal and the cloud server carry out data interaction through a network, and the OBD vehicle-mounted terminal specifically comprises a connection module used for connecting a vehicle ECU and obtaining vehicle engine operation characteristic data; the sensor module is used for collecting vehicle driving characteristic data; the emission prediction module is used for performing prediction analysis on the vehicle emission condition based on the vehicle engine operation characteristic data and the vehicle driving characteristic data to obtain a vehicle emission prediction result; the communication module is used for uploading the vehicle emission prediction result to a cloud server; and the cloud server is used for receiving and storing the vehicle emission prediction result, analyzing whether the vehicle has an emission abnormal condition based on the vehicle emission prediction result, and pushing prompt information to the outside when the vehicle has the emission abnormal condition. According to the invention, the OBD-based vehicle emission monitoring accuracy can be improved.

To provide an exhaust emission control device and a control device capable of inhibiting an occupant from being aware of noise of a reactor while suppressing deterioration of exhaust emission control performance.SOLUTION: An exhaust emission control device is used for an internal combustion engine of a vehicle. The exhaust emission control device includes a power source, a reactor and a control device. The reactor generates plasma by receiving supply of voltage from the power source and purifies exhaust gas of the internal combustion engine. The control device changes frequency of the voltage to be supplied by the power source on the basis of vehicle speed, speed of the internal combustion engine or an opening of a throttle valve of the vehicle.SELECTED DRAWING: Figure 1

The utility model relates to a semiconductor tail gas treatment device and a semiconductor process system. The semiconductor tail gas treatment device comprises a gas supply module, a purity analysis module, a recovery module, a tail gas treatment module and a tail gas emission module. The device has the advantages that the purity analysis module is communicated with the gas supply module, and the recovery module is added, so that the purity of the special process gas conveyed by the gas supply module can be detected in real time, and if the purity of the special process gas meets the standard, the special process gas can be recovered and conveyed to the process chamber.

The invention provides a bus lane optimization design method and system considering road section scale tail gas emission. The method comprises the following steps: collecting urban bus lane design element information, road section traffic flow information and road section basic information; traffic flow operation condition data of a road section where the urban bus lane is located are obtained through a virtual simulation method, and the tail gas emission equivalent of vehicles on the road section is obtained; screening characteristic variables from the design element information of the urban bus lane by adopting an encapsulation type characteristic selection method; adopting an interpretable machine learning method to analyze the influence of the characteristic variables on the vehicle exhaust emission of the road section, and outputting the influence contribution degree sequence of the characteristic variables; and optimizing the design scheme of the bus lane by adopting an optimization algorithm by taking the minimization of the total amount of the tail gas emission of the vehicles on the road section as a target function. The invention provides an ecological design scheme for a bus lane so as to obviously reduce the vehicle tail gas emission of a city bus road section.

The invention discloses a method for monitoring tail gas emission of an aircraft refueling vehicle, and solves the problem that PM quantitative data acquisition is inaccurate in a complex environment of an airport. The method comprises the following steps: stably sampling and removing aviation kerosene steam through a sampling probe integrating sensing and flow guide adjustment; synchronously detecting and deducting background gas interference; performing secondary dehumidification and constant-temperature pretreatment on the tail gas; the double detection units are linked to collect multi-dimensional data, and a nonlinear interference correction model is constructed through fusion; and adopting an exclusive calibration mode and marking invalid data. The method further comprises the design of wind speed adaptation, condensation backflow prevention, working condition and area label optimization, double-link encryption transmission, safe installation, optical signal compensation, graded maintenance and the like. The method can resist multiple environmental interferences, PM detection errors are controllable, data updating is efficient, and airport safety operation and compliance monitoring requirements are met.

The invention discloses a sludge drying treatment method and system based on real-time data analysis, and relates to the technical field of sludge drying treatment.The sludge drying treatment method comprises the steps that Kalman filtering and linear interpolation methods are adopted, and sludge drying process parameters are preprocessed; analyzing sludge drying process parameters after pretreatment by utilizing edge calculation, detecting sludge moisture content, equipment temperature, energy consumption and tail gas components by adopting an isolated forest method, and generating working condition state summary information by adopting a state coding method; the working condition state summary information and the preprocessed sludge drying process parameters are combined, and the future drying state trend is predicted through an ARIMA model; based on the working condition state summary information and the prediction result, adopting a reinforcement learning method to adjust operation parameters of the drying equipment; the control strategy is optimized through the reinforcement learning method, the energy consumption is remarkably reduced, the exhaust emission concentration is reduced, and the purposes of improving the energy efficiency and the environmental protection performance are achieved.

A control system for a hybrid electric vehicle having an electric drive module and an internal combustion engine with an exhaust system. The control system includes one or more oxygen (O2) sensors disposed proximate to a catalytic converter in the exhaust system, the one or more O2 sensors each being configured to measure an O2 level of exhaust gas produced by the engine. A controller is in signal communication with the one or more O2 sensors and programmed to detect the hybrid electric vehicle is keyed on, determine the hybrid electric vehicle is keyed to run in an electric vehicle (EV) mode without the engine started, and initiate an O2 sensor heating mode to heat the one or more O2 sensors to a predetermined target temperature prior to the engine starting. The predetermined target temperature is operable for closed loop fueling feedback control, to thereby reduce exhaust emissions.

The objective is to provide a hydraulic control device for an internal combustion engine that can prevent abnormal noises and suppress deterioration of fuel efficiency and exhaust emissions. [Solution] A hydraulic control device for an internal combustion engine comprising: a first oil passage for supplying oil from an oil pump to a component; a second oil passage connected to the first oil passage for supplying the oil from the oil pump to a chain tensioner; a control valve provided in the first oil passage on the component side of the position where the second oil passage is connected; and a control unit for controlling the opening degree of the control valve.

The application discloses a kind of process method and fixture of processing wedge type locking block, method includes S1 preparation plate material;S2 blanking to plate material;S3 heat treatment plate material as blank;S4 numerical milling processing 1: numerical milling blank, drilling forms light hole and thread bottom hole, thread bottom hole tapping processing;S5 numerical milling processing 2: cutting blank;S6 surface passivation treatment;S7 to final inspection;For the fixture for processing wedge type locking block includes clamping seat, pressing plate, first locking screw and second locking screw, clamping seat is provided with clamping through slot, first threaded hole and mounting hole, pressing plate is provided with second threaded hole;By improving process method, multiple process contents are combined, clamping frequency is reduced, semi-finishing requirement in process is increased, no burr can be generated in process, because clamping frequency is reduced, part surface quality is improved;Raw material utilization is higher, is half of all materials of original process scheme, total amount of waste gas emission is reduced by half compared with original process scheme.

The urea filling device with the additive filling function comprises a urea liquid storage tank, a control assembly, a driving assembly, a filling assembly and an additive liquid storage tank, and the control assembly controls the driving assembly to enable additives in the additive liquid storage tank to be filled through the filling assembly; a mixed solution filling pipe connected with the urea liquid storage tank and the additive liquid storage tank can also be arranged. According to the urea filling device with the additive filling function, additives can be filled while urea is filled, and the filling mode is simple and convenient; and by arranging the mixed solution filling pipe, the additive is uniformly dispersed in the urea, so that both the additive and the urea can normally play a role, the tail gas emission of the vehicle is qualified, and the post-treatment SCR system is in a good state.

This invention provides a fuel injection method for an engine, an engine, a vehicle, and a computer-readable storage medium, relating to the field of vehicle exhaust emission control technology. The fuel injection method provided by this invention includes the following steps: Before the engine reaches a stable idle speed, fuel is injected at a preset fuel pressure during the first intake stroke and the first compression stroke of each working cycle, wherein the fuel injection mass ratio of the first intake stroke to the first compression stroke is greater than 4:1, and the preset fuel pressure ranges from 20 to 50 MPa. When the engine speed is at a stable idle speed, fuel is injected during the second intake stroke and the second compression stroke of each working cycle at a preset fuel pressure, wherein the fuel injection mass ratio of the second intake stroke to the second compression stroke is greater than or equal to 4:1. This method ensures that the vehicle's exhaust emission level meets the requirements of Euro 6 emission standards without requiring a particulate filter, thus optimizing the engine's original emissions.

The utility model relates to the technical field of automobile exhaust emission detection, and discloses an automobile exhaust emission detection device which comprises a detector and a probe, the probe is connected with the detector through a wire, a fixing frame is arranged on the side, away from the detector, of the probe, a connecting plate is fixedly connected to the side wall of the fixing frame, and the connecting plate is fixedly connected with the detector. A fixing mechanism is arranged in the fixing frame, and a dismounting mechanism is arranged between the connecting plate on one side and the probe; the fixing mechanism comprises a rotating ring, the rotating ring is rotatably connected to the interior of the fixing frame, an arc-shaped groove is formed in the rotating ring in a penetrating mode, and a guide rod is fixedly connected to the interior of the fixing frame. According to the device, the rubber ball is tightly attached to the exhaust pipe and fixes the position of the device by rotating the rotating ring, the rotating ring is locked through the spring and the clamping plate, and stable connection of the device is ensured, so that the device can be suitable for exhaust pipes with different thicknesses, and meanwhile, stable connection of the device and the exhaust pipe in the monitoring process is ensured.

This work vehicle is provided with: an engine 21; a muffler 22 which is disposed adjacent to the engine 21 and discharges exhaust of the engine 21 to the outside; a cooling unit 23 which cools hydraulic oil stored in a hydraulic oil tank 43 while circulating the hydraulic oil by a hydraulic pump 10; and a separation plate 53 which separates the muffler 22 and the cooling unit 23.

The invention relates to the technical field of motor vehicle tail gas detection, in particular to a method for detecting tail gas quality through rotating speed detection of a motor vehicle, which comprises the following steps: S1, preparing detection equipment and environmental parameter configuration; s2, instrument self-inspection and gas path cleaning before measurement are carried out; and S3, initializing docking measurement conditions of the exhaust system. Accurate rotating speed monitoring and pollutant concentration determination jointly ensure authenticity and representativeness of tail gas emission data, the pollutant concentration is effectively corrected through subsequent data processing means such as dilution factor and humidity correction, the accuracy of a test result is further improved, and based on comprehensive analysis of flow and pollutant concentration data, the accuracy of the test result is improved. According to the method, the emission quality and the specific emission amount in unit time can be accurately calculated, clear quantitative indexes are provided for whether the vehicle reaches the standard or not, the functions are used in cooperation, the high efficiency, the accuracy and the traceability of tail gas detection are guaranteed, and the method has remarkable practical value for improving environment monitoring and pollutant control.

System for calculating and collecting a road usage charge for a motor vehicle (1) powered by a drive unit (3), comprising a first control unit (20) arranged in or on the motor vehicle (1) and a second control unit (30) arranged outside the motor vehicle (1), wherein the first control unit (20) can exchange data with the second control unit (30), wherein the first control unit (20) generates a characteristic value dependent on actual energy consumption and / or actual exhaust emissions from data of the drive unit (3) during operation of the drive unit (3) and continuously stores it in a writable intermediate memory (23) of the first control unit (20), which reflects an environmental impact actually caused by the operation of the drive unit (3) in a defined time interval,wherein the first control unit (20) transmits the current value of the stored parameter to the second control unit (30) as part of the data exchange and clears the intermediate memory (23) after successful transmission of the parameter to the second control unit (30), and wherein the second control unit (30) calculates a road usage charge payable by the owner or driver of the motor vehicle (1) for that motor vehicle (1) for the time interval, characterized in that a first control unit (20) arranged in or on the motor vehicle (1) and a second control unit (30) arranged outside the motor vehicle (1) comprise, wherein the first control unit (20) can exchange data with the second control unit (30),wherein the first control unit (20) generates a data set dependent on actual energy consumption and / or actual exhaust emissions from data of the drive unit (3) during operation of the drive unit (3) and continuously stores it in a writable intermediate memory (23) of the first control unit (20), which represents an environmental impact actually caused by the operation of the drive unit (3) in a defined time interval, wherein the second control unit (30) transmits a formula to the first control unit (20) at the beginning of the data exchange, according to which the first control unit (20) generates a characteristic value for the time interval to be evaluated within the framework of this data exchange from the current values ​​of the stored data set, wherein the first control unit (20) transmits the generated characteristic value to the second control unit (30) and clears the intermediate memory (23) after successful transmission of the characteristic value to the second control unit (30),and wherein the second control unit (30) uses the transmitted parameter to calculate a road usage charge payable by the owner or driver of the motor vehicle (1) for that motor vehicle (1) for the time interval.

A dual fuel internal combustion engine system includes a dual fuel engine, an air intake system configured to provide intake air to the dual fuel engine, a hydrocarbon (HC) fuel system configured to selectively provide HC fuel to the dual fuel engine for combustion therein, and a hydrogen (H2) fuel system configured to selectively provide H2 fuel to the dual fuel engine for combustion therein. A control system includes a controller having one or more processors configured to control the HC fuel system and the H2 fuel system, based on an operating condition of the dual fuel engine, to maximize fuel efficiency and minimize exhaust emissions.

The utility model discloses a waste gas emission monitoring terminal, which relates to the technical field of waste gas monitoring and comprises a fixing component, a ventilation sleeve, air-tight doors hinged to two sides of the outer wall of the ventilation sleeve and communicating pipes arranged on two sides of the ventilation sleeve. The replacement part comprises a segmentation assembly arranged in the ventilation sleeve, an invasion assembly blocking plate arranged on the segmentation assembly, a pressing assembly arranged in the invasion assembly blocking plate and an extrusion assembly arranged at the end of the pressing assembly, and the invasion assembly blocking plate is inserted into the segmentation assembly. The movable rod is pressed to move, the movable rod drives the extrusion circular truncated cone to move, the fixed ball is made to move, and movement of the fixed ball is controlled. The fixing ball is clamped into or separated from the interior of the fixing groove, the monitoring piece is replaced, and the problem that an existing ventilation sleeve is hard in connection and inconvenient to replace is solved.

A system for controlling exhaust emissions from an internal combustion engine (10), the system comprising: a catalyst device (31) for purifying exhaust gas from the internal combustion engine; Means (S103) for determining that the catalyst device is in a lean state; characterized by Means (S106 etc.) for suppressing an amount of NO x contained in the exhaust emission from the internal combustion engine, wherein the suppression means is actuated when the determining means determines that the catalyst device (31) is in the lean state and when the internal combustion engine (10) is operated at a load higher than a predetermined level, wherein the suppression means (S106, etc.) determines an amount of NO x -Suppression according to a driving speed (SPD) of the vehicle on which the internal combustion engine is mounted.

The present application provides a kind of energy-gathering disc pot rack and gas stove, it relates to the technical field of kitchen utensils, the energy-gathering disc pot rack includes energy-gathering disc body and support foot piece;Energy-gathering disc body is equipped with central through hole;Energy-gathering disc body is equipped with annular convex structure, the area between annular convex structure and the inner hole edge of central through hole forms secondary air preheating area.The gas stove includes energy-gathering disc pot rack.It relieves the technical problem that the existing gas stove exists in the combustion process, when the secondary air of lower temperature enters the central through hole of energy-gathering disc, there is diffusion to the gathering area of combustion heat energy air mass and heat exchange, reduces the temperature field of the gathering area of combustion heat energy air mass, so that the temperature of combustion flame is not high, causes heat energy loss, produces the technical problem of low combustion thermal efficiency, achieves the best effect of overall combustion condition, thereby improves the combustion thermal efficiency, and reduces the technical effect of CO exhaust emission.

To provide an air conditioning system that effectively regulates the heat of exhaust air and discharges temperature-controlled exhaust air to the outside. [Solution] The present invention comprises an outdoor unit, an indoor unit, a first refrigerant piping for circulating refrigerant between the outdoor unit and the indoor unit, a third heat exchanger for heating or cooling exhaust air discharged from the exhaust port of the outdoor unit, wherein the exhaust air heated or cooled in the third heat exchanger is discharged outside the air conditioning system, and a second refrigerant piping for circulating a portion of the refrigerant between the outdoor unit and the third heat exchanger so that the heating or cooling in the third heat exchanger is performed using a portion of the refrigerant that has been heat-exchanged with outside air in the first heat exchanger.