7062 results about "Cost performance" patented technology

There is provided a backside protective sheet for a solar battery module that is excellent in strength as well as in various properties such as weathering resistance, heat resistance, water resistance, light resistance, wind pressure resistance, hailstorm resistance, chemical resistance, moisture resistance, antifouling properties, light reflectivity, light diffusivity, and design, and is particularly excellent in the so-called “moisture resistance,” which is the ability to prevent the entry of moisture, oxygen and the like, and durability against performance degradation with time, particularly against hydrolytic degradation and the like, and is also excellent in protective capability. There is also provided a backside protective sheet for a solar battery module, which can facilitate inventory control by properly using the front side and back side of the protective sheet depending upon applications and is excellent in cost performance, and a solar battery module using the same. The backside protective sheet for a solar battery module comprises: a deposited assembly comprising a vapor-deposited film of an inorganic oxide provided on at least one side of a substrate; and a transparent or translucent heat-resistant polyolefin resin layer provided on both sides of the deposited assembly.

The invention relates to a lithium-ion secondary battery anode material technology, in particular to a lithium-rich manganese-based anode material Li(Li(1-2x) / 3Nix-aMyMn(2-x) / 3-b)O2 (M is Co, Al, Ti, Mg and Cu) and a preparation method thereof. A general formula of the lithium-rich manganese-based anode material is as follows: Li(Li(1-2x) / 3Nix-aMyMn(2-x) / 3-b)O2 (M is Co, Al, Ti, Mg and Cu), wherein x is more than 0 and less than or equal to 0.5, when M is Co and Al, y is more than 0 and less than 2x, a is equal to b, and b is equal to y / 2; when M is Ti, y is more than 0 and less than (2-x) / 3, a is equal to 0, and b is equal to y; and when M is Mg and Cu, y is more than 0 and less than x, a is equal to y, and b is equal to 0. The invention has high specific discharge capacity, excellent normal temperature and high temperature cycle performance, good safety, low raw material cost and production cost, and very high cost-performance ratio.

The invention discloses a roadside parking space detection device based on computer vision, comprising an omnidirectional vision sensor and a microprocessor, wherein the omnidirectional vision sensor is installed at the roadside with parking spaces; the microprocessor is used for analyzing the parking space state according to the data of a parking space video shot by the omnidirectional vision sensor; and the microprocessor comprises an omnidirectional image acquisition unit, a parking space customizing module, a parking space state detection module based on a sampling point model, and a parking space state information releasing module. The invention provides the roadside parking space detection device which is based on the computer vision, has the advantages of wide detection range, high detection precision, good detection instantaneity, high cost performance, strong environmental adaptation capability and good expandability and sustainable development, is convenient to implement and maintain and is convenient to realize on an embedded system.

The invention discloses a distributed storage oriented cloud storage security architecture and a data access method thereof. The distributed cloud storage oriented security architecture comprises a cloud storage server, a distributed storage manager, a wafer breaker and storage devices, wherein the distributed storage manager and the cloud storage server are respectively connected with a client-side; the distributed storage manager and the cloud storage server are connected by a fiber channel (FC) or a routing switch; the wafer breaker is imbedded in the distributed storage manager; the distributed storage manager is connected with the storage devices by the FC or Iscsi; and the storage devices are connected by a network attached storage (NAS) or a storage area network (SAN). The storage devices are located at different places and are redundant mutually, thus improving the fault-tolerant ability of the devices and the optimal storage use ratio; the wafer breaker is used for carrying out fragment on stored data, so that the data are fragmented into data fragments which can not be identified by other authentication systems, and the fragmented data have relative confidentiality and security in the process of network transmission and data storage; and the storage devices and the server are the devices with higher cost performance, thus reducing the cost.

The invention discloses a wear type lower limb assistant robot, a folding method thereof and a hand luggage for carrying. The robot is characterized by comprising a lower limb assistant mechanical device and a servocontrol system, wherein the lower limb assistant mechanical device is provided with wearable assistant mechanical legs which are symmetrically arranged on the two sides of a wearable waistband. The wearing load on human bodies can be effectively relieved, and the robot has the characteristics of high safety performance, simple man-machine coordination control, good following assist effect, high cost performance and the like; the robot can be changed into a portable body which is compact in structure through the folding method, and a user can conveniently carry and store the robot in various manners through matching with the hand luggage for carrying, so that the nursing requirements of the middle-aged and the aged people on daily activities such as walking and walking up and down stairs can be better satisfied.

The invention relates to an intelligent vehicle-bone type running state monitoring and early warning device used for rail transporting vehicles. The device comprises at least a group of sensing component units used for obtaining the vehicle operation state, including the operation state of wheels on rails, the state of the deformation of a vehicle chassis component and a railway and abnormal road conditions or the state of vehicle-bone devices; an intelligent sensing information processing unit based on a micro processor and used for processing the sensing signals of the vehicle state, including signal processing, data-collecting processing, image edge detection and extraction, image tracking, the processing and the intelligent analyzing of mechanical vibration / noise information, data identification and extraction, the learning of vehicle states and relevant background information, the forming of monitoring and early warning results and information recording and storing; input / output units used for the output, the operation, the control and the data communication of the monitoring and early warning results; and a power supply unit. The intelligent vehicle-bone type running state monitoring and early warning device has the advantages of multiple functions, high intelligentization and informatization level, high cost performance, high creditability and convenient installation, etc., is easy to be expanded, and can be applied under all weather conditions.

The invention provides a grading storage method for a system. According to the importance, the visiting frequency, the retention time and the performance index of data, the data is stored in storage devices with different performances by adopting different storage modes, so as to realize automatic migration of data objects among the storage devices; and the data which is not visited frequently is automatically transferred to lower layers in storage layers, so that storage space with higher cost can be released for the data with higher visiting frequency, so that better cost performance is obtained, further, the space occupied by the non-important data in primary local disks can be greatly reduced, and the storage performance of the whole system is quickened.

The invention discloses a hydraulic-drive four-leg robot. The modular hydraulic-drive four-leg robot has the advantages that the hydraulic-drive four-leg robot is good in dynamic balance and high in topographical adaptability, loading capacity and cost performance, and is in a modular and bionic structural design, four leg shapes can be switched over by means of quickly assembling and disassembling subassemblies, the modular hydraulic-drive four-leg robot is multipurpose, and merits and shortcomings of various leg shapes are verified by experiments at a physical prototype stage; each single leg is provided with two leg sections, has three degrees of freedom and comprises a hip joint and thigh assembly, a knee joint and shank assembly and a side sway assembly; a side sway and connecting block combining form is adopted for each thigh portion according to a bionic principle, so that sufficient rigidity and strength are guaranteed, the hydraulic-drive four-leg robot can bear a load stably while the weight of the robot is reduced to the greatest extent, and sufficient activity space for hydraulic cylinders is guaranteed; shank portions comprise foot-end rubber pads and passive retractable bidirectional spring shock absorption mechanisms, and instant impact force generated when the robot is in contact with the ground can be effectively buffered and absorbed under multiple shock absorption actions; problems of limited service lives of components and vulnerability of electronic elements such as foot-end force sensors due to the fact that impact force disappears and springs are rebounded quickly when an existing robot leaves the ground can be solved by the aid of the bidirectional spring mechanisms.

The invention specifically relates to a mass tuned vibration reducer used for regulating the subsidence ratio of the vibration of the related structures. The mass tuned vibration reducer comprises a mass block, a spring, a damper and a base, and is characterized in that the damper is an adhesion-type damper formed by a damping cylinder, adhesive damping fluid and a piston, wherein, the piston and the adhesive damping fluid are arranged in the damping cylinder, and at least part of the piston is immerged into the adhesive damping fluid. The mass tuned vibration reducer adopts the adhesion-type damper formed by the adhesive damping fluid and the piston and can provide three dimensional damping, so as to effectively prevent side tumbling and ensure the vibration reducer realizes smooth actions; vibration mass is not needed to be provided with a special guide device, so that the mass tuned vibration reducer has reliable work and higher cost performance, and basically needs no maintenance. Meanwhile, the mass tuned vibration reducer realizes the aim of regulating the natural frequency and the subsidence ratio at any time, thus better exerting the vibration absorption performance of the mass tuned vibration reducer, ensuring stableness and safety of the pedestrians and vehicles on the large-span bridge and the thin and high building, contributing to prolonging the service lives of the thin and high building and the bridge, and having remarkable economic and social benefits.

A semiconductor device includes an electrical insulating layer with superior heat resistance, heat dissipation, and durability, and which is manufactured through a process with good cost performance and process performance. In a semiconductor device including a first substrate to which a semiconductor chip is mounted directly or indirectly, and a white insulating layer formed on a surface of the first substrate and functioning as a reflecting material, the semiconductor chip is an LED, at least the surface of the first substrate is made of a metal, and a stacked structure of the white insulating layer and a metal layer is formed by coating a liquid material, which contains SiO2 in the form of nanoparticles and a white inorganic pigment, over the surface of the first substrate and baking the coated liquid material.

The invention relates to a robot for disposing dangerous goods and ammunition, which is structurally characterized in that a rotation platform and a crawler-type travelling mechanism are mounted on a frame, a mechanical arm is mounted on the rotation platform, a manipulator is connected to the front end of the mechanical arm, a rotation cylinder is mounted on the lower portion of the rotation platform, the mechanical arm comprises a large arm, a small arm, a telescopic arm, a large arm cylinder, a small arm cylinder and a telescopic control motor, and the manipulator comprises a wrist lifting mechanism, a wrist rotating mechanism and a pick-and-place mechanism. The robot is large in grabbing torque, high in precision, fine in stability, wide in operation range, convenient and flexible in control, convenient in operation, stable and reliable in running, high in cost performance and capable of disposing the dangerous goods, the ammunition and the like within a limited distance by means of remote control.

The invention relates to a management method of a multifile copy of a distributed file system. A copy management mechanism based on a frequency is adopted, the state of a file copy is changed according to the read-write access frequency of the file and the information trend of an access resource, and the position transference is increased / reduced and stored through the trend of the quantity of the file copy. The management method includes copy grading management, copy creating policy, copy selection and orientation, and a copy consistency maintenance method. The creating method of the file copy includes the creating initiated by the user and the creating initiated by a crunodes, and adopts a data gridding method and a policy based on the benefit drive. The orientation of the copy maps a logic file on an appropriate copy, and a copy with minimum cost and highest access efficiency is selected to be provided to the user for using. The invention has the advantages that the provided service carries on the excellent characteristics of the distributed file system, which includes loose coupling, high usability, high reliability and high cost performance.

Disclosed is a spark-ignition gasoline engine, which comprises control means operable, when an engine operation zone is a high-load operation zone including a WOT region within at least a low speed range, to adjust a closing timing of an intake valve in such a manner as to maintain an effective compression ratio at 13 or more, and retard an ignition timing to a point within a predetermined stroke range just after a top dead center of a compression stroke, wherein the effective compression ratio is calculated based on an intake-valve closing timing defined by a valve lift amount of 1 mm. The present invention can provide a spark-ignition gasoline engine having both a low-cost performance and a high engine-power performance even in a high-load operation zone (particularly WOT region) in a low speed range.

The invention discloses a load balancing method and system facing mixed cloud application and a corresponding mixed cloud load balancing system. Aiming at the fact that a cloud tenant uses mixed clouds to calculate IaaS (infrastructure as a service) platform deployment application, the invention solves the problem of load balancing of the application under a multi-cloud environment. The system and method use a layered load balancing mechanism, load state information and resource state information of private clouds and public clouds are dynamically collected by a heartbeat packet at an upper layer, and issuing priorities of tasks to respective clouds are adjusted; at a lower layer, and LBaaS (load balancing as a service) internally provided form the clouds is used to perform load balancing among virtual machines. During outbreak of the cloud application, the public cloud with the highest cost performance can be selected for resource extension according to price fluctuation of the public clouds and the requirement of the cloud tenant on the minimal cost budget. According to the invention, the cloud tenant can be helped to customize application requirements per se when using the mixed clouds, and automatically select a cloud resource use scheme with the highest cost performance.

A none-angular displacement parallel damping device mainly comprises a movable platform, a fixed platform, four branches and damper springs, wherein the branches are used for connecting the two platforms and are identical with one another in structure. One end of a first connecting rod in the branches is connected with the fixed platform through a first revolute pair, the other end of the first connecting rod is connected with one end of a second connecting rod through a second revolute pair, and the other end of the second connecting rod is connected with the movable platform through a cylindrical pair. The axis of the first revolute pair is parallel to that of the second revolute pair, and the axis of the second revolute pair is parallel to that of the cylindrical pair. The whole device is square. The four branches are symmetrically and evenly distributed. Four corners between the fixed platform and the movable platform are respectively and perpendicularly provided with one first damper spring, and the two sides of the cylindrical pair are respectively sleeved with one second damper spring. The none-angular displacement parallel damping device is simple in structure, small in occupied size, easy to process and high in cost-performance ratio, and has broad application prospect in many fields.

The invention, belonging to the technical field of universal plastics modification, discloses a polypropylene composition and a preparation method thereof. The polypropylene composition disclosed herein comprises the following ingredients: 38.5-95 weight parts of polypropylene, 5-25 weight parts of toughening agent, 0-35 weight parts of inorganic filler, 0-0.5 weight parts of lubricant, 0-0.5 weight parts of light stabilizer, and 0-0.5 weight parts of antioxidant. The preparation method disclosed herein comprises the following steps: adding 38.5-95 weight parts of polypropylene, 5-25 weight parts of toughening agent, 0-35 weight parts of pretreated inorganic filler, 0-0.5 weight parts of lubricant, 0-0.5 weight parts of light stabilizer, and 0-0.5 weight parts of antioxidant in a high mixing machine to mix for 5-10 min; adding the mixture in a double-screw extruder from the charging hole, and granulating. According to the invention, under the condition of keeping excellent comprehensive performances, the polypropylene composition disclosed herein has low production cost, high cost performance, and strong competitive power on the market, and can be widely applied in the material fields of auto-inner ornaments, door sheets, bumpers, liners and shells of household appliances, etc.

The present invention discloses an air conditioner automatic control switch with energy-saving function and control method and thereof, the air conditioner automatic control switch comprises a micro-processor, a human body sensing component connected with an input pin of the micro-processor, a temperature sensor connected with an input pin of the micro-processor, an infrared ray receiving set, a power failure protection storage device connected with the micro-processor by a despotic synchronization serial port, an infrared ray transmitting device connected with an input pin of the micro-processor, a toggle switch group, an underpressure early warning equipment and a power source equipment for supplying electric voltage to the control switch. The present invention has the effects and advantages of low cost, high cost performance, good versatility, obvious energy-saving effect, convenient use, good independency, high security, and intelligentized air conditioning control, thereby insuring automatic closing air conditioner under unmanned circumstance and generating considerable energy-saving effect.

The invention relates to an intelligent configuration storage backup method suitable for cloud storage. The method comprises the following steps: selecting a storage backup strategy according to user requirements, wherein the storage backup strategy comprises a layered storage sub-strategy and an efficiency performance sub-strategy; classifying documents to be backed up according to the layered storage sub-strategy, and performing file level or data block level data deduplication and further compression on the documents to be backed up according to the efficiency performance sub-strategy; transferring the documents to storages of different levels according to the layered storage sub-strategy, and reserving an index pointer pointing to a storage place; and checking the previous backup state of the documents, and backing up the processed documents to backup equipment to complete backup synchronization. In the method, the data are subjected to deduplication, compression and layered storage, so that the data deduplication rate and cost performance of system performance occupancy rate can be improved, and the storage resource configuration is optimized.

The invention discloses a traffic anti-rut asphalt modifier and a preparation method thereof; the asphalt modifier is prepared from the following components in parts by weight: 20 to 200 parts of thermoplastic elastomer, 5 to 450 parts of polyolefin, and 5 to 400 parts of rubber powder. Simultaneously, the invention also discloses modified asphalt which contains the asphalt modifier and application of the modified asphalt in asphalt mixture. The invention can significantly improve the high-temperature performance and the anti-rut capability of the asphalt mixture, improves anti-water damage and anti-low temperature cracking and other performance, and has high cost performance. Compared with asphalt modification, the invention does not need to add asphalt modification equipment, can significantly reduce energy consumption and loss in the production process, can realize long-termed inventory, prevents the problem of the poor storage stability of modified asphalt, does not affect the mixing proportion design, does not change the gradation of the asphalt mixture under any content, only finely adjusts the asphalt-aggregate ratio, has simple construction process, and realizes random adding through a direct feeding method.

The invention discloses a high electrical property and low corrosion flame retardant reinforcing nylon material and a preparation method thereof, aiming at solving the defects of low electrical property and high corrosion caused by red phosphorus based flame retardant added into flame retardant reinforcing nylon in the prior art. The invention adopts the technical scheme that the high electrical property and low corrosion flame retardant reinforcing nylon material disclosed by the invention has the formulation (by weight percent): (1) 40-65% of nylon 66 resin, (2) 10-20% of red phosphorus based flame retardant masterbatch, (3) 1-5% of compatilizer, (4) 3-10% of synergistic compound flame retardant system, (5) 0.5-5% of acid absorbent, (6) 0.1-0.5% of antioxidant, (7) 0.2-0.8% of lubricating agent and (8) 10-30% of glass fiber; and the reinforcing nylon material can be prepared by mixing all the components in a high-speed mixing machine for 1-2min and then putting into a twin-screw extruder for extrusion and pelleting. The flame retardant reinforcing nylon material is excellent in the electrical property, low in corrosion (extremely low in corrosion for equipment and a mould) as well as high in fluidity, heat resistance and cost performance, and is capable of meeting the requirements of electrical and electronic appliances such as a temperature controller, a contactor, a circuit breaker and the like as well as domestic appliance products.

The invention belongs to the field of intelligent traffic video image monitoring and video image analysis, and in particular relates to a method and a system for automatically identifying an urban traffic accident. The method for automatically identifying the traffic accident comprises the following steps of: acquiring an urban road video image sequence; performing foreground vehicle separation based on a mixed Gaussian background model; performing a multi-target vehicle tracing algorithm based on a Camshift algorithm and a kalman filtering combination; extracting traffic accident determiningparameters such as speed variation, horizontal position variation, vertical position variation, moving direction variation and the like; and proposing a multi-featured weighted fusion automatic accident identification algorithm. Traffic accident information is transmitted to a traffic control center in time by a transmission unit and a display unit, so that the traffic accident can be quickly treated, an effective and flexible road traffic monitoring means with high cost performance is provided for traffic management, and new thought is provided for the development of a high-efficiency intelligent video traffic accident system.

The invention belongs to the technical field of engineering plastic modification, and discloses a thermoplastic polyester composition and a preparation method thereof. The thermoplastic polyester composition is prepared from the following components by weight: 37-95 parts of thermoplastic polyester, 5-25 parts of a flexibilizer, 0-35 parts of an organic filler, 0-1 part of a coupling agent, 0-1 part of a lubricant, and 0-1 part of an antioxidant, wherein the thermoplastic polyester is selected from one or more than one of thermoplastic polyester resin or thermoplastic polyester reclaimed materials; the flexibilizer is selected from a flexibilizer 1 or a flexibilizer 2; when thermoplastic polyester is selected as the thermoplastic polyester, the flexibilizer is selected from one or more than one of flexibilizer 1 or a mixture of flexibilizer 1 and flexibilizer 2; when thermoplastic polyester reclaimed materials or a mixture of reclaimed materials and resin are selected as the thermoplastic polyester, the flexibilizer is selected from one or more than one of flexibilizer 1, flexibilizer 2, or a mixture of flexibilizer 1 and flexibilizer 2. The product of the invention maintains excellent comprehensive performance, and has very high cost performance.

The invention relates to a high-precision laser photocuring 3D (three dimensional) printer. The high-precision laser photocuring 3D printer comprises a shell and a pedestal. The high-precision laser photocuring 3D printer has the beneficial effects that one end of a high-precision ball screw is connected with a servo motor, the control precision of the servo motor is guaranteed by a rotary encoder at the rear end of a motor shaft and is accurate, and the high-precision laser photocuring 3D printer utilizes the servo motor, so that the printer is stable, and the energy consumption is reduced; as the ball screw has the characteristics of high positioning precision, small friction force, high rigidity and strong load capacity, the molding precision of the printer is high; a circuit control module is connected with a touch screen and a power supply switch respectively through data wires to intelligently control the printer, so that the control precision and processing efficiency are increased; a digital projection device comprises a digital projector horizontally fixed on the upper side of the pedestal, and a plane mirror, so that the structure of the printer is compact; the digital projection device comprises an ultraviolet source and a focusing lens, and the focusing lens is arranged above the ultraviolet source, so that the realizing theory is simple, and the cost performance is high.

The invention relates to a multifunctional data acquisition module based on a compact peripheral component interconnect (CPCI) bus. The multifunctional data acquisition module comprises a hardware module and a field-programmable gate array (FPGA) program. The hardware module comprises an impedance control circuit board, an electronic component, a small computer system interface (SCSI100) signal connection socket, a standard CPCI bus connector, and a standard 3UEurocard front panel. The impedance control circuit board and the electronic component are the core functional carriers of the invention and are divided into eight functional units such as an analogue-digital (AD) conversion module, a digital-analogue (DA) conversion unit, a timer unit, a counter unit, a universal input-output (IO) unit and an auxiliary circuit unit. The FPGA program comprises an AD conversion module, a DA conversion module, a timer module, a counter module and a universal IO module and is programmed and developed by Verilog hardware description language (HDL). The multifunctional data acquisition module has steady performance, high reliability, high bus signal driving capability, far transmission distance, simple structure, powerful function, high cost performance, is convenient to use, and can perform long-term and continuous mass data transmission.

The invention discloses a dual redundant fault-tolerant system based on embedded type CPU, comprising a basal plate, a first CPU module, a second CPU module, a first output switching module, a second output switching module and a communication module, wherein the first CPU module, the second CPU module, the first output switching module, the second output switching module and the communication module are arranged on the basal plate and communicate with an upper computer through the communication module; and the first CPU module and the second CPU module complete the data acquisition of a sensor and then carry out data processing and operation and finally output a result through the first output switching module or the second output switching module to drive an execution module to work. The invention solves the problem of the single-point fault of the traditional dual redundant fault-tolerant system and can still keep the system in a normal working state by switching the system to redundant backup equipment when the system is in a fault mode; in addition, the dual engine redundant fault-tolerant system has the advantages of simple method, high general reliability, structure simplification of selected parts and high cost performance.

The invention discloses a high-performance polycarboxylate water reducing agent and a low-temperature one-step preparation method thereof. In the invention, high-activity isopentene alcohol polyethenoxy ether or isobutylene alcohol polyethenoxy ether large monomer and acrylic acid react in a water solution at a low temperature (30-50 DEG C) to obtain the high-performance polycarboxylate water reducing agent in a two-dropping one-step mode. The water reducing agent has the advantages of high water reducing rate, low doped amount, high dispersity, favorable slump retaining property, wide applicability and high cost performance, and is suitable for various types of cement; and when the water reducing agent is used, more powdered ores and fly ash can substitute cement. The preparation method is simple for operation, and has the advantages of low energy consumption and environmental protection; three wastes are not discharged in the whole production process; and thus, the preparation method is a green synthesis method.

The invention discloses functional fatty powder and a preparation method thereof, and belongs to the technical field of feeds. The functional fatty powder is characterized in that raw materials comprise the following components in parts by weight: 30-50 parts of concentrated omega-fatty acid fat, 10-20 parts of lecithin, 8-15 parts of concentrated linolenic acid fat, 8-15 parts of MCT, 1-5 parts of choline, 1.5-5.5 parts of nicotinamide, 1-5 parts of a composite emulsifying agent, 3-8 parts of a composite antioxidant, 2-8 parts of vitamin C, and 40-70 parts of encrusting substances or 30-60 parts of carriers. The functional fatty powder provided by the invention is small in addition quantity, high in cost performance ratio, good in stability, high in nutrient value and high in fat utilization rate; the functional fatty powder not only can greatly improve the growing property and the reproductive property of animals but also can improve the immunity of the animals and promote the development of animal organisms, so that the functional fatty powder is an excellent feed additive.

The invention belongs to the field of electrical engineering, distributed power generation and power quality control, and aims to provide a multi-functional grid-connected inverter and a grid-connected inverter control method. The grid-connected inverter comprises a direct-current bus bar with a capacitor and three sets of single-phase full-bridge inverter circuits sharing the direct-current bus bar, the direct-current output ends of a distributed power supply or a grid-connected energy-storing generating set are connected to both ends of the capacitor of the direct-current bus bar, the output of each set of single-phase full-bridge inverter circuit is connected to a filter, and the output ends of each filter are connected with a distribution network of the 380V voltage class through a single-phase step-up isolation transformer. According to the invention, the grid-connected inverter equipment is effectively utilized to carry out effective control on the power quality of points of interconnection, so that the grid-connected inverter is multi-purpose and multi-functional, the cost performance of the grid-connected inverter is enhanced, the investment, operation and maintenance cost of a system can be reduced, and the reliability of the system can be enhanced. The principle of the provided control scheme is clear, and the control scheme is highly operable and reliable in operation.

The invention discloses a split air conditioner with a fresh air purification intelligent control device. The split air conditioner with the fresh air purification intelligent control device comprises an outdoor unit and an indoor unit, wherein a fresh air pipe, a fresh air valve, an air return valve, an air quality detection sensor, a purification and filtering system, an evaporator, an auxiliary heater, a double-air-inlet low-noise centrifugal air supply fan and an air supply outlet with manual adjustable swing blades are sequentially arranged in the indoor unit from bottom to top. The split air conditioner with the fresh air purification intelligent control device fully solves the problem of poor indoor air quality, and outdoor fresh air can be introduced inside at proper time and can be purified; temperature and humidity adjustment can be realized; indoor VOC harmful gas can be removed; the air conditioner is provided with an internal circulation working mode and an external circulation working mode, i.e., a fresh air mode and a mixed air mode; the one-step filtering efficiency of inhalable particulate matters PM2.5 at the indoor air outlet can reach more than 90 percent and the national good standard of less than 35mg can be reached; the split air conditioner with the fresh air purification intelligent control device is convenient to install, and the installation, debugging and maintenance are facilitated by adopting a split design; the cost performance of the entire air conditioner is high, and the air conditioner is low-carbon, energy-saving, healthy and comfortable.