79results about How to "Little impact on appearance" patented technology

The invention relates to low-odor PVC powder. The low-odor PVC powder comprises 100 parts of PVC resin, 35-50 parts of plasticizer, 5-10 parts of heat stabilizer, 0.2-1.0 part of light stabilizer, 0.3-1.0 part of antioxidant, 3-5 parts of dispersant and 1-5 parts of deodorant. The deodorant is formed by at least one of nano calcium carbonate, nano zinc oxide, fumed silica, precipitated silica and hot-melt rubber powder. The low-odor PVC powder further comprises a coupling agent formed by at least one of an aluminate coupling agent, a borate coupling agent, an aluminum-titanium coupling, a titanate coupling and dispersible rubber powder, and the mass ratio of the coupling agent to the deodorant is (1-5):100. The invention further provides a preparing method of the low-odor PVC powder. The surface of the deodorant is modified by the coupling agent, and the compatibility between the deodorant and the PVC matrix is improved.

The invention relates to the electronic technology field and discloses a screen module, electronic equipment and a micro-crack detection method for the screen module. The screen module comprises a glass substrate, a touch detection layer, a screen driving chip, N detection wires, N connection pins and N detection units, wherein the touch detection layer is laid on the glass substrate, the N detection units are arranged in the screen driving chip, the N detection wire and the N connection pins are respectively arranged at periphery of a display function zone of the touch detection layer, the periphery of the display function zone is provided with N detection zones, each detection zone is provided with one detection wire, one ends of the N detection wires are in ground connection, the other ends of the N detection wires are correspondingly connected with the N connection pins, the N connection pins are correspondingly connected with the N detection units, and the N detection units are used for detecting whether the N detection wires are conducted. According to the screen module, a conduction state of each detection wire is detected, whether the detection zones have micro cracks can be detected respectively, the screen module having a micro crack can be effectively detected, and the location position of the micro crack can be further detected.

The invention relates to a reinforcement material for preservation of cultural relics, and a preparation method and an application thereof. The reinforcement material for the preservation of the cultural relics is an organic silicon composite material prepared by a sol-gel reaction by using tetraethoxysilane as a matrix, silicon dioxide nanoparticles and terminal-hydroxyl polydimethylsiloxane as terminal-hydroxyl polydimethylsiloxane modifiers, wherein the mass ratio of the tetraethoxysilane to the nanosized silicon dioxide and to the polydimethylsiloxane is 100 : (0-25) : (0-6).

The invention relates to an environmental-friendly flam retarding glass fiber reinforced polyester alloy material and a preparation method thereof. The polyester alloy material contains 50 to 70 percent makrolan, 10 to 40 percent of polyester, 3 to 5 percent compatilizer, 3 to 6wt percent of flame retarder, 0.1 to 1 percent of antioxidant, 0.3 to 1wt percent of lubricant and 3.5 to 10 percent of glass fiber. The preparation method is that: the makrolan and the linear saturated polyester are adopted as the matrix resin, and the compatilizer, the flame retarder, the antioxidant, the lubricant and the glass fiber are added in, and at last the pelleting process is carried out by a double screw extruder. The polyester alloy material has high surface brightness and excellent resistance to hydrolysis, thereby enlarging the application range of the polyester alloy and being widely used for fields of producing of three-phase electricity meter shells, home appliances and automobile parts, etc.

A centrally-mounted drive system of an electric bicycle comprises a chain wheel, a motor, a middle shaft and a reduction box, wherein the chain wheel has a disc-shaped structure; a concave circular mounting part is arranged in the middle position of the chain wheel; a housing of the reduction box is arranged in the concave mounting part and matched with the chain wheel; a reducing mechanism in the reduction box is a composite dual-overrun clutch, wherein the inner ring of an outer clutch and the outer ring of an inner clutch share the same component which serves as the output end of a hybrid power source; and the inner ring of the outer clutch is coaxially fixed to the chain wheel. The centrally-mounted drive system of the electric bicycle employs coaxial mounting, coaxial output and single-stage helical gear parallel transmission manners and successfully avoids great change of a frame caused by lift mounting; the single-stage reducing mechanism is employed to realize coaxial output; the volume of the motor is effectively reduced, which has little influence on the appearance of the entire bicycle; and viewed from the angle of the appearance of the entire bicycle, the similarity of the electric bicycle to the bicycle is very high.

The invention discloses a cutting and packing device for a connected material belt. The device comprises a device support, wherein a material belt positioning mechanism, a material belt conveying mechanism, a cam cutting mechanism, a receiving and carrying mechanism, a picking, carrying and product overturning mechanism, a picking, carrying and arranging mechanism, a burr striking mechanism and amaterial bin mechanism, wherein the connected material belt to be cut and packed is placed on the material belt positioning mechanism and is conveyed to a cutting die of the cam cutting mechanism through the material belt conveying mechanism for cutting; the cut material is conveyed out through the receiving and carrying mechanism; the picking, carrying and overturning mechanism is used for conveying the product from the receiving and carrying mechanism to the burr striking mechanism for removing burr, and then the product is conveyed to the material bin mechanism. The device has the advantages of being high in production efficiency, high in produced product accuracy, and small in influence on product appearance.

The invention discloses an air conditioner which comprises a shell and an inner assembly positioned in the shell, wherein the shell comprises a panel, a side plate, a rear plate, a bottom plate and an air inlet grating, and the inner assembly comprises a condenser and an evaporator. The air conditioner is characterized in that the air conditioner is positioned indoors and also comprises an air inlet pipe and an air outlet pipe which penetrate through a wall body; outdoor air is introduced into the air conditioner via the air inlet pipe and an air inlet on the rear plate to carry out heat exchange with the condenser; the air subjected to heat exchange is discharged out of a room via the air outlet on the rear plate and the air outlet pipe; the evaporator is a V-shaped heat exchanger and comprises a first evaporator part and a second evaporator part; and the first evaporator part and the second evaporator part are set to form an included angle. The special structure form of the air conditioner has the characteristics of strong process operability, simple structure and small occupied space, is convenient to install and is suitable for various buildings.

The invention discloses a composite reinforcing method for grotto roof peeling defects of a sandstone grotto. According to the method, the miniature anchoring technology in miniature hole drilling is combined with the miniature chemical grouting technology, and the problem of the grotto roof peeling defects of the sandstone grotto is solved through inner and outer integral reinforcement. The composite reinforcing method has the main technical characteristics that: grouting holes are tiny, and fine grouting pipes and manual injection guns are adopted for grouting; in addition, an exhaust pressure reducing pipe is arranged on a rubber opening sealing plug; the damage to a grotto rock body structure is little in the drilling and grouting process; additional cleavage stress is not generated in the grouting process, and the problem of construction damage due to further expansion of joint fissures in the grouting process can be solved; the miniature anchoring rod reinforcement is adopted, the defects of great construction disturbance and serious contamination and damage to the surface layer of the grotto of the traditional anchoring rod technology can be effectively overcome; and meanwhile, the problem of flaky defect expansion phenomenon which cannot be solved by the traditional pasting technology can be effectively solved.

A method for forming a semiconductor structure comprises the following steps: providing a substrate; forming gate structures on the surface of the substrate; forming an initial stress layer on the surface of the substrate on the two sides of the gate structures, wherein the material of the initial stress layer is amorphous; forming a cover stress layer on the surface of the initial stress layer; and after the cover stress layer is formed, converting the material of the initial stress layer into a crystalline material through a solid-phase process, and forming a source and drain stress layer. The morphology and the performance of the formed semiconductor structure are improved.

The invention discloses a PET fiber hybrid glass fiber reinforced unsaturated polyester resin bulk molding compound which comprises the following components in parts by weight: 80-150 parts of BMC unsaturated polyester resin, 60-80 parts of a low shrinkage agent, 0.5-5 parts of a polymerization inhibitor, 0.5-10 parts of a curing agent, 8-15 parts of a release agent, 260-350 parts of calcium carbonate, 100-450 parts of aluminum hydroxide, 60-90 parts of chopped glass fibers and 5-30 parts of chopped PET fibers. The tensile strength and the impact property of the BMC prepared by mixing the PETfibers with the glass fibers are equivalent to those of the BMC prepared from pure glass fibers, the bending strength is improved, the glossiness of the product is well kept, and the problems that a plastic package BMC product is low in bending strength, high in brittleness and prone to cracking are solved.

The utility model discloses an anti-counterfeit method which adopts watermark technology aiming at multilayer wave weft, which comprises embedding water mark and withdrawing water mark; wherein the embedding water mark comprises the following steps: 1). Optional water mark point, which is suitable for weft appearance requirements, is searched among original small sampling document; 2). Optional water mark point is judged whether to be in conformity with balance requirements of weft tension; 3). Optional water mark point suiting for requirements are coded and water mark information is embedded; withdrawing water mark comprises the following steps: 1). Each tissue point of original small sampling document is compared currently to identify different tissue point which is a water mark point; 2). Converse coding is made for the water mark point to get water mark information. Based on analyzing production process and anti-counterfeit requirement of figured cloth, the minimizing coding proposal is adopted by the utility model. Through computer simulation and production site experiment, the method is proved effective and practical; the utility model has the advantages that the difficulty and cost of forger are increased and own brand pattern of the multilayer wave figured cloth can be effectively protected.

The invention discloses a climbing cone type triangular cantilever bracket which consists of a triangular bracket, a climbing cone bolt, a cone-shaped nut, a steel plate, a steel mesh and a permanent seat. The permanent seat is fixedly arranged on the side face of a pier body through match of a screw and the cone-shaped nut. The upper end on one side of the triangular bracket is hinged with the permanent seat while the lower end on another side is fixedly arranged on the side face of the pier body through the screw. The use level of materials of the whole bracket is small and the pier bodyloss rate is low, and the bracket can be repeatedly used, so that the construction cost is lowered. The bracket is in a split mounting type pin joint structure, so that the bracket is erected and detached in a short time and high is construction efficiency, and the process step transfer time can be shortened. The cone-shaped nut is adopted, so that the pier body can be repaired after the bracket is detached, the a pre-buried hole is small, the pier body is convenient to repair, and the shape of the pier body is less affected. Particularly, the steel plate and the steel mesh are pre-buried in the pier body, so that crack of the pier body bearing the bracket is effectively prevented, the anti-shearing force and anti-pressure ability of the pier body are improved, and meanwhile, the riveting property of the climbing cone bolt is further enhanced to provide the probability of supporting the cantilever of a cast-in-place box beam.

The invention discloses a ro-ro passenger ship construction method. In a section dividing stage: at least one horizontal divide line is arranged along that horizontal direction at least one deck layerin the vertical direction of the passenger-rolling ship; at least one vertical dividing line is arranged at intervals in the vertical direction in the width direction of the passenger ship. In a segmentation phase, at least one lay of deck is vertically spaced apart to provide a horizontal divide line in that horizontal direction, a vertical dividing line is arranged in the width direction of thepassenger-rolling ship, and the passenger-rolling ship is divided into a plurality of segments, each segment contains a plurality of decks, and the segments can be manufactured with the outer plate of the passenger-rolling ship as the bottom surface in the segmentation manufacturing stage, so that the structural strength of the segments is effectively improved.

Provided is a bending member for a bamboo reinforced wood beam. The member is composed of a wood beam, a bamboo board, an adhesive, angular fasteners sand anchor bolts. The bamboo board is closely bonded on the bottom surface of the wood beam through the adhesive. The angular fasteners are arranged on angle positions where the bottom surface intersects with side surfaces of the wood beam along thevertical direction of the wood beam at spaced intervals. Bottom flanges of the angular fasteners are fixed on the bottom surface of the bamboo board. Flanges on the side surfaces of the angular fasteners are fixed on the side surface of the wood beam in order to form a member body. Through the angular fasteners, the reinforced wood board is anchored multiple times. The member enjoys following advantages of effectively preventing separation between the bamboo board and the wood beam, improving anti-bending performance of the wood beam and fully leveraging high anti-pulling strength of the bamboo material.

The invention relates to a reinforcing structure for a damaged wood structure mortise-tenon joint. The reinforcing structure for the damaged wood structure mortise-tenon joint comprises a wood pole and a tiebeam. The end of the tiebeam is a tenon portion. A group of transversely parallel self-tapping screws are inwards screwed into the tiebeam from the end of the tenon portion, and the group of transversely parallel self-tapping screws are located on the same facade. When the reinforcing structure for the damaged wood structure mortise-tenon joint is used for reinforcing, the facade structureof the wood structure is not damaged, the stage periphery structure is not influenced, and the force bearing capacity of the damaged wood structure mortise-tenon joint can be conveniently and effectively improved. The reinforcing method is easy to implement, has little influence on the appearance of the mortise-tenon joint and is convenient to popularize.

The invention provides a method for synthesizing a continuous body of inflaming retarding ABS (Acrylonitrile Butadiene Styrene). An inflaming retarding agent is added in an ABS continuous body synthesizing system so as to achieve the purpose of endowing the fire resistance with materials in a synthesis process to ensure that the inflaming retarding ABS is synthesized without the steps of blending and pelleting again. Compared with the inflaming retarding ABS obtained through blending in the prior art, the prepared inflaming retarding ABS has better inflaming retarding effect under the condition of the same addition quantity of the inflaming retarding agent; and the inflaming retarding agent has little influence on the ABS mechanical property compared with the blending method.

The invention discloses an outer curtain wall hollowed aluminum board rod net structure and a construction method thereof. A steel pipe column is perpendicular to a wall face in a net-shaped distribution mode, one end of the steel pipe column is fixedly welded with a pre-buried board, and a sleeve is inserted inside the other end of the steel pipe column. After the overall flatness of the sleeve is adjusted, the sleeve is fixedly connected with the steel pipe column, reserved openings are correspondingly formed at the upper portion and the lower portion of the part, stretching out of the steel pipe column, of the sleeve, upright rods are vertically inserted in the reserved openings of the sleeve and are fixed, and cross rods are vertically fixed to the upright rods at intervals. Suspending and connecting lugs are welded to the back faces of hollowed aluminum boards, and are connected to the cross rods in a suspended mode, the cross rods are arranged in adjusting holes, the adjusting positions of the adjusting holes are determined by positioning pieces, and the positioning pieces and the suspending and connecting lugs are fixed by blind rivets. Flanges are arranged at the back faces of the hollowed aluminum boards, and the flanges of adjacent hollowed aluminum boards are locked and fixed by bolts. The outer wall hollowed aluminum board rod net structure can adjust flatness at two times, so that the flatness and smoothness of the installation of the hollowed aluminum boards are ensured, the outer curtain wall hollowed aluminum board rod net structure is suitable for installation of various kinds of outer curtain wall hollowed aluminum boards, and is also suitable for installation of arc-shaped hollowed aluminum boards.

The invention discloses a soft steel damper with a staged yield damping function. The damper comprises a pair of fold-surface connecting steel plates, soft steel energy-dissipation steel sheets, sleeve hoop pieces and high-strength bolts; the two fold-surface connecting steel plates are parallelly and symmetrically arranged in the vertical direction, the two opposite fold-surface connecting steelplates are connected through the multiple soft steel energy-dissipation steel sheets, and the soft steel energy-dissipation steel sheets are perpendicular to the planes where the connecting steel plates are located and the horizontal plane; the soft steel energy-dissipation steel sheets are provided with elliptical internal holes, the elliptical internal holes are horizontally formed in the long axis of the soft steel energy-dissipation steel sheets, and energy-dissipation ribs are formed by open holes of the internal holes; the two horizontal ends of the soft steel energy-dissipation steel sheets are perpendicularly embedded into hollowed-out positions of the fold-surface connecting steel plates correspondingly; the parts, extending out of the fold-surface connecting steel plates, of thetwo ends of the soft steel energy-dissipation steel sheets are connected with the sleeve hoop pieces; and the fold-surface connecting steel plates are connected with a building structure through the high-strength bolts. According to the soft steel damper, the goal of staged energy-dissipation damping is achieved, and the soft steel damper has the advantages of simple structure, convenient manufacturing and mounting, and good energy-dissipation effect.

The invention provides a wood pin half-tenon joint reinforced by self-tapping screws. The wood pin half-tenon joint reinforced by the self-tapping screws comprises a first wood member with a mortise opening and a second wood member with a tenon; a group of rift grain self-tapping screws are arranged in the axial direction of the tenon on the second wood member in the rift grain direction in a drilling mode, and a group of cross grain self-tapping screws are arranged at the positions, in the cross grain direction, perpendicular to the axial direction of the tenon in a drilling mode; a group ofcross grain self-tapping screws are arranged at the positions, located on the two sides of the mortise opening in the cross grain direction, on the first wood member in a drilling mode; and a corresponding pre-drilling hole is perpendicularly formed in the corresponding position of the tenon and the mortise opening, and a wood pin is inserted into the pre-drilling hole. The wood pin half-tenon joint reinforced by the self-tapping screws has enough initial rigidity, flexural bearing capacity and deformation capacity, prevents the tenon from being broken and damaged and wood cross grain from being split off and damaged, and the stress capacity of the joint is improved.

The invention discloses a panel structure, which comprises a glass substrate, a decorative film, an adhesive layer, an ink layer, a filling layer and a fingerprint identification element. The decorative film is arranged on the glass substrate, and the decorative film is provided with an opening. The adhesive layer is arranged between the glass substrate and the decorative film. The ink layer is arranged in the opening and is in contact with the glass substrate. The filling layer is arranged in the opening and on the ink layer, wherein the upper surface of the filling layer is higher than the upper surface of the decorative film or is coplanar with the upper surface of the decorative film. A fingerprint identification element is arranged on the filling layer. According to the panel structure provided by the invention, the opening size of the decorative film can be reduced, the appearance influence caused by a color difference between the decorative film and the ink layer is reduced, andthe identification capability of the fingerprint identification element is improved.

The invention relates to a nano-emulsion simultaneously loaded with linseed oil and lutein and a preparation method thereof, and the nano-emulsion is prepared from the following raw materials in percentage by mass: 0.4%-1% of lutein, 4%-10% of linseed oil, 0.8%-1.5% of linseed gum, 3%-6% of glycerol, 5%-10% of medium chain triglyceride and the balance of ultrapure water. The preparation method comprises the following steps: stirring and dissolving lutein, linseed oil, glycerol and medium chain triglyceride to obtain an oil phase, stirring and dissolving linseed gum and water to obtain a water phase, pouring the water phase into the oil phase, continuously stirring to be uniform, and carrying out ultrasonic emulsification or high-pressure homogenization to obtain the nano emulsion compounded with linseed oil and lutein. The linseed oil and the xanthophyll are creatively loaded in the nano-emulsion at the same time, so that the solubility of the linseed oil and the xanthophyll in a water-based matrix is improved, and the stability and the bioavailability of the linseed oil and the xanthophyll are remarkably improved. The nano-emulsion has good regulation and protection effects on a large number of groups using eyes, and is an ideal functional product.

The invention discloses a built-in motor applying dynamic transducer circuit combination. The built-in motor includes a driving device and a linkage device. The driving device drives the linkage device. The linkage device comprises a gearbox, a middle shaft and a protective sleeve. The gearbox is fixedly connected with a protection box. The middle shaft is placed in the protective sleeve. The middle shaft is provided with a torsion sleeve in a sleeved mode. The torsion sleeve is fixedly connected with the middle shaft. A transmitting feedback circuit is arranged on the inner wall of the protective sleeve. A receiving and collecting circuit is arranged on the torsion sleeve. According to the built-in motor, a bicycle rider can use a bottom bracket of a general vehicle frame (that is, a special vehicle frame is not required) to install the built-in motor applying dynamic transducer circuit combination in a DIY mode, and the general bicycle is refitted into an electric bicycle; and the built-in motor applying dynamic transducer circuit combination can also be used for mass production installation of electric bicycles manufacturing plants.

The invention discloses an encircling LED road bridge handrail lamp which comprises a tube-shaped outer shell and an LED assembly. The tube-shaped outer shell can be fixedly installed on a handrail, and an inner cavity of the tube-shaped outer shell is matched with the handrail in shape. The LED assembly is installed inside the tube-shaped outer shell. The tube-shaped outer shell comprises a first outer shell and a second outer shell. One end of the first outer shell and one end of the second outer shell are connected together through a connecting device in a pivoting mode, and the other end of the first outer shell and the other end of the second outer shell are fixedly connected through a bolt. The connecting device comprises a circular-arc-shaped clamping hook and a circular-arc-shaped clamping hole, wherein the circular-arc-shaped clamping hook is arranged at the end of the second outer shell, and the circular-arc-shaped clamping hole is formed in the end of the first outer shell and matched with the circular-arc-shaped clamping hook. The encircling LED road bridge handrail lamp is independent of the handrail, in other words, only the LED road bridge handrail lamp needs to be provided, and the handrail needs not to be manufactured. Therefore, different installation requirements of an old bridge and a new bridge can be met at the same time. The encircling LED road bridge handrail lamp is easy to install on site, and meanwhile uniformity of the installation angle of the LED road bridge handrail lamp is easy to ensure. After the LED road bridge handrail lamp is installed, influences on the appearance of the handrail are minimized and the manufacturing technology is simple.

The invention discloses a plant stem and leave drying method. Microwave fluidized bed equipment is used for drying wet materials of the plant stem and leave, the patent number of the microwave fluidized bed equipment is 201220174418.8, and the microwave fluidized bed equipment is recorded in China patent for utility models with the title of 'microwave fluidized bed equipment for drying solid particles'. The plant stem and leave drying method includes that drying temperature is controlled at 50-90 DEG C, and wind speed is at 0-30m / s; and hot wind or microwave are combined to be used for drying the time when the microwave fluidized bed equipment is adopted; and diameters of the wet materials of the plant leaves are 2cm-8cm, and water content is 12%-25%. With the plant stem and leave drying method, the problems of parts of the plant leaves being burnt with uneven drying and color fading caused by high local temperature, long time consumption and uneven drying when the plant leaves are dried are solved. The plant stem and leave drying method of the plant leaves has the advantages that environment temperature is low when the plant leaves are dried, surface appearance of samples are not affected much, energy consumption is low, processing is simple, and operation is facilitated and the like.

The invention relates to an electrostatic powder spraying technique for a part of a child dinning chair. The electrostatic powder spraying technique for the part of the child dinning chair comprises the following steps that S1, a bonding layer (1) is prepared, specifically, bonding agent powder is sprayed onto the surface of a base material through a spray gun; S2, a protection layer (2) is prepared, specifically, raw material powder for the protection layer is sprayed onto the surface of the bonding layer (1) prepared in the step S1 through the spray gun; and S3, a waterproof layer (3) is prepared, specifically, waterproof paint is evenly smeared on the surface of the protection layer (2) prepared in the step S3. The electrostatic powder spraying technique for the part of the child dinning chair has the advantages that the cost is low, attractiveness is ensured, and the coatings are not prone to being damaged by external force.

The invention provides an automobile outer holding strip installation structure which comprises an automobile door metal plate and an automobile outer holding strip arranged on the automobile door metal plate. A buckle for supporting the automobile door metal plate and the automobile outer holding strip is arranged between the automobile door metal plate and the automobile outer holding strip. Thebuckle comprises a hanging part in lap joint with the top of the automobile door metal plate and a limiting part abutting against the outer end face of the automobile door metal plate. The limiting part comprises inner buckling angles located on the outer end face of the automobile door metal plate and supporting the lower angle of the automobile outer holding strip. The hanging part comprises anouter buckling angle located on the inner end face of the automobile door metal plate and buckled and matched with the inner face of a steel strip of the automobile outer holding strip. The lower angle of the automobile outer holding strip is supported through the inner buckling angles. The inner face of the steel strip of the automobile outer holding strip is in lap joint with the hanging part and extends to the inner side of the automobile door metal plate, the outer buckling angle extending to the inner side of the automobile door metal plate from the hanging part is buckled and matched with the end portion of the inner face of the steel strip, and the installation structure of the automobile outer holding strip is optimized. The invention further provides an automobile with the automobile outer holding strip installation structure.

The invention discloses a welding disc used for welding golden bricks, golden fingers or bump pieces, etc. The welding disc comprises two parts which are arranged in line and mutually independent; the whole profile of the two parts is coincident to the external profile of the golden bricks / golden fingers / bump pieces. When the welding disc of the invention is adopted, the hardware pieces and bump pieces are not easy to be inclined and the finished product is easy to be assembled during the welding production of SMT. When the welding disc of the invention is adopted, the surface of the hardware is not plated by Sn, the appearance is affected little, the surface of the bump piece is not easy to be plated by Sn, the spot-welding is affected little, and the finished product has little defective products and high production efficiency.

The invention discloses a curtain wall system, relates to the technical field of curtain walls of buildings, and aims to solve the problem that an opening sash is exposed on the outer facade of a building when being opened. The curtain wall system comprises a first stand column, a second stand column, a curtain wall, an opening sash and a ventilation piece, an installation gap is formed between the second stand column and the first stand column, a first ventilation channel is formed between the curtain wall and the second stand column and communicates with the installation gap, and the opening sash is installed on the side, close to a building, of the curtain wall and installed in the installation gap and shields the installation gap. When the opening sash is opened, the opening sash is located on the inner side of the building, the installation gap communicates with the inner side of the building, a ventilation cavity is formed in the ventilation piece, the ventilation piece covers the first ventilation channel, the first ventilation channel communicates with the ventilation cavity, a second ventilation channel is further formed in the ventilation piece, and the two ends of the second ventilation channel communicate with the ventilation cavity and the outer side of the building correspondingly. The curtain wall system is used for forming the outer vertical face of the building.