595 results about "Air layer" patented technology

The present application relates to a kind of weft-knitted free cutting knitted fabric and its manufacturing method, the fabric includes air layer jacquard structure, the air layer jacquard structure includes three layers of bottom layer, intermediate layer and surface layer, the bottom layer is below the intermediate layer, the surface layer is above the intermediate layer, the bottom layer is interwoven using nylon yarn and ordinary spandex, the intermediate layer is connected using ordinary spandex, and extend to the surface layer, the surface layer is interwoven using nylon yarn and ordinary spandex.The present application can realize the effect that both economic and not easy to scatter, burr, edge curl of loop structure.

A postprocessing device includes a processing tray, a sheet processor, an air blower, an inlet roller pair, and a drive controller. The air blower forms an air layer between an upper face of a first recording sheet already placed on a loading surface of the processing tray, and a lower face of a second recording sheet to be newly placed on the processing tray, by sending air along a transport direction of the recording sheet, from an upstream side in the transport direction toward the loading surface. The drive controller performs an air sending operation, by causing the air blower to send air along the transport direction, before a second recording sheet contacts the upper face of the first recording sheet, and stop sending air before a trailing edge of the second recording sheet in the transport direction passes a nip region defined by the inlet roller pair.

The utility model provides a warm-keeping weft knitting fabric with a three-dimensional effect, which is a fabric which is knitted on a circular knitting machine and has a rib air layer tissue structure. The fabric is formed by alternately weaving a fabric structure air layer composed of tight and stiff single-face weft plain stitch coil transverse rows and loose and soft single-face weft plain stitch coil transverse rows and loose and soft double-face rib stitch transverse rows, and the fabric structure air layer obviously protrudes out of the surface of the fabric; the tight and stiff single-side weft plain stitch transverse columns are woven by paper composite yarns, the loose and soft single-side weft plain stitch transverse columns are woven by fine modified polyester Monenz yarn blended yarns, and the loose and soft single-side weft plain stitch transverse columns are woven by the fine modified polyester Monenz yarn blended yarns, so that a transverse stripe effect is formed between the loose and soft single-side weft plain stitch transverse columns and the flat loose and soft double-side rib stitch transverse columns. The loose and soft double-faced rib coil row is formed by weaving fine-count modified polyester Monenz yarn blended yarn, the paper composite yarn is composed of paper yarn, first modified polyester supercool multifilament and second modified polyester supercool multifilament, and the outer surface of the paper yarn is sequentially wrapped with the first modified polyester supercool multifilament and the second modified polyester supercool multifilament from inside to outside.

A system and method for enhancing marine vessel efficiency through integrated hull optimizations is disclosed. The system includes automated bow thruster covers that reduce hull drag and condition water flow, coupled with strategically positioned air lubrication nozzles that create and maintain an air layer under the vessel. The bow thruster covers may be configured as circular doors or parallel panels, optionally incorporating air discharge ports or working in conjunction with dedicated air jets. An intelligent control system optimizes the integrated components using real-time sensor data and computational fluid dynamic analysis. The system modulates air distribution and cover positions based on sea conditions and vessel speed, maintaining optimal efficiency during operation. External surfaces may incorporate superaerophilic structures to enhance air retention and reduce drag. The comprehensive integration of these components provides improved hydrodynamic efficiency while maintaining full bow thruster functionality when required.

A polarization conversion transmission type reconfigurable metamaterial structure with amplitude-phase independent regulation and control is formed by copying and translating n * n basic units, and each basic unit comprises three dielectric layers, five metal layers and two air layers; the dielectric layers comprise a first dielectric layer, a second dielectric layer and a third dielectric layer from top to bottom; a first air layer is arranged between the first dielectric layer and the second dielectric layer, and a second air layer is arranged between the second dielectric layer and the third dielectric layer; the amplitude regulation and control layer is located on the upper surface of the first dielectric layer, and the amplitude regulation and control bias circuit layer is located on the lower surface of the first dielectric layer; the polarization conversion phase regulation and control layer is located on the upper surface of the second dielectric layer, and the polarization conversion phase regulation and control bias circuit layer is located on the lower surface of the second dielectric layer; the polarization gate layer is located on the upper surface of the third dielectric layer. According to the invention, efficient electromagnetic regulation and control in a transmission mode are realized, independent regulation and control in two dimensions of amplitude and phase are realized, and unification of high transmissivity and accurate regulation and control in a microwave frequency band is realized.

The invention relates to an ultrahigh-temperature-resistant radio-frequency coaxial cable and a manufacturing method thereof. The cable comprises an inner conductor, an insulating foaming layer, a first outer conductor, a glass fiber belt, a silicon dioxide aerogel coating, a second outer conductor, a flame-retardant fireproof layer and a flame-retardant sheath layer which are sequentially arranged from inside to outside, wherein the first outer conductor is provided with a first embossing structure comprising wave crests and wave troughs; the second outer conductor is provided with a second embossing structure comprising wave crests and wave troughs; the positions of wave crests and wave troughs of the first embossed structure are consistent with the positions of corresponding wave crests and wave troughs of the second embossed structure, and air layers are formed between the first embossed structure and the glass fiber belt and between the second embossed structure and the silicon dioxide aerogel coating. According to the invention, the safety and reliability of the cable in extreme environments such as fire disasters and the like are remarkably improved, and communication interruption of the radio frequency coaxial cable in high-temperature environments of fire disasters is avoided.

The invention belongs to the technical field of fluid control and atomization, and particularly relates to a main control system, a liquid supply system, a generation system and an auxiliary system. The generating system comprises a water storage tank, a porous steel sheet arranged at the bottom of the water storage tank, conical micropores formed in the porous steel sheet, a piezoelectric transducer fixed to the bottom of the porous steel sheet, a soaking copper plate arranged at the top of the water storage tank and an electric heating layer installed on the soaking copper plate. Due to the fact that an existing annular transducer cannot meet the requirement for generation of a single water drop or multiple water drops and cannot meet the requirement for accurate and controllable sizes of the water drops, a rectangular transducer pair is adopted as an excitation device, surface wave superposition can be generated through vibration of the transducer, meanwhile, the liquid level of a water storage tank is controllable, and the energy storage efficiency is improved. High-temperature pulses are applied to the air layer on the upper surface of the water layer, so that the pressure in the water tank is controllable during spraying, and inconsistent diameters of water drops caused by uncontrollable pressure are avoided.

Designs of image sensing devices by including a substrate layer including a plurality of photoelectric conversion elements, a plurality of grid structures disposed over the substrate layer, a plurality of color filter layers each of which is disposed between adjacent grid structures, a plurality of over-coating layers formed over the color filter layers, and a plurality of microlenses formed over the over-coating layers. Each of the grid structures includes an air layer, and a capping film formed to cap the air layer, and an upper portion of the air layer is formed to protrude upward from the over-coating layer.

This invention discloses a broadband composite sound insulation structure, including a first sound insulation mechanism and a second sound insulation mechanism. The first and second sound insulation mechanisms are disposed opposite to each other, with a closed air layer formed between them. Through the arrangement of the first, second, and air layers, the broadband composite sound insulation structure of this invention can effectively reduce and suppress broadband noise, including high-frequency, mid-frequency, and low-frequency noise. By incorporating the first and second sound insulation panels, noise reduction can be achieved while minimizing external environmental pollution to both the first and second sound insulation layers.

The utility model discloses an air layer breathable fabric with upper and lower mesh jacquard and a vamp, and relates to the technical field of fabrics. The upper and lower mesh jacquard air layer breathable fabric comprises a surface layer, a middle layer and a bottom layer, the surface layer and the bottom layer are woven and connected through monofilaments or multifilaments to form an air layer, the middle layer comprises a plurality of cavities, and the surface layer and the bottom layer are both provided with a plurality of semi-through holes. The tuck semi-through holes and the full-through holes are formed in the surface layer and / or the bottom end, and the air layer is arranged between the surface layer and the bottom layer to improve the ventilation effect; the doubling stitch semi-through holes are formed in the surface layer and the bottom layer in an inclined needle mode, and the heat retention property of the air layer breathable fabric in the whole application process is improved; according to the air layer breathable fabric, the overall structure is matched, so that the fabric has breathability and heat retention property, the layer bodies are connected in a staggered mode, and the integrity of the fabric is better.

The invention relates to a knitted fabric for fire protection and outdoor protection and a knitting process thereof, and belongs to the technical field of textiles. The knitted fabric sequentially comprises an inner layer, a first connecting layer, a second connecting layer and an outer layer from inside to outside. The inner layer and the outer layer are respectively and independently in weft plain stitch or single-face jacquard weave, the connecting layers are all in double rib stitch, the other connecting layer is connected with the inner layer or the outer layer through coils of the connecting layers, and the inner layer and the outer layer are connected through tuck stitch. The knitted fabric is excellent in structural elasticity; the connecting layer adopts interlaced double rib stitches, so that the thickness of the fabric is increased, a static air layer is provided while the light weight of the fabric is ensured, and the warm keeping effect and the heat insulation effect of the fabric are improved; a shape memory material is fed into the connecting layer, so that the interval between the inner layer and the outer layer can be enlarged, and the content of still air is further increased.

The invention relates to the technical field of optical engineering, and discloses a near-infrared polarization insensitive MEMS tunable metasurface band-pass filter which comprises a silicon substrate and a gold structure covering the silicon substrate. The gold structure comprises an upper-layer gold structure and a lower-layer gold structure which are connected through the MEMS, the upper-layer gold structure and the lower-layer gold structure are both square, and the centers of the upper-layer gold structure and the lower-layer gold structure are subjected to square hollow treatment to form a metasurface An FP resonant cavity is formed between the upper and lower gold structures; surface plasmons are generated on the contact surface of the gold structure and the hollow air layer; under the combined action of the FP resonant cavity and the surface plasmon, the metasurface structure realizes transmission of electromagnetic waves at a specific wavelength, and a band-pass filtering effect is achieved. The tunable metasurface band-pass filter provided by the invention is a transmission type metal metasurface filter, a surface plasmon effect is generated on the contact surface of a gold structure and a square hollow-out air layer, two physical mechanisms are coupled to filter a specific wavelength, and the working wavelength can be tuned through an external MEMS structure.

The invention belongs to the technical field of super-hydrophobic material underwater stability evaluation, and particularly relates to a super-hydrophobic material liquid-gas interface stability testing device and a super-hydrophobic material liquid-gas interface stability testing method. Laser is irradiated to the surface of a super-hydrophobic material by utilizing the underwater silver mirror phenomenon of the super-hydrophobic material; the stability condition of an underwater gas film of the super-hydrophobic material is explored by measuring the illumination of reflected light, the stability of the super-hydrophobic material under the hydrostatic pressure is quantitatively represented, the relation between microstructure parameters of the super-hydrophobic material and hydrostatic pressure resistance is explored, and accurate evaluation of the liquid-gas interface stability of the super-hydrophobic material under the hydrostatic pressure is achieved. A theoretical basis is provided for designing an underwater high-stability super-hydrophobic material; the device is simple in structure, the method is convenient to operate, the design is rigorous and reliable, the application range is wide, the stability of the gas layer on the surface of the super-hydrophobic material can be quantitatively represented only by measuring the reflected illuminance of a liquid-gas interface, and the error of a test result is small.

The invention discloses a large seaplane integrated with a distributed electric propulsion technology and a propulsion method, and relates to the technical field of seaplane. Comprising a fuselage, a left wing and a right wing are arranged on the two sides of the fuselage respectively, and a V-shaped hull is arranged at the lower end of the fuselage; and a T-shaped empennage is arranged at the tail part of the fuselage. Through the synergistic effect of the design of the V-shaped ship body and the distributed propulsion system, the whole ship body makes contact with the water surface to provide sufficient buoyancy at the low speed, only the main sliding face makes contact with the ship body to form an air layer at the high speed, and the air film drag reduction effect of a propeller at the bottom of the ship body is matched, so that the water resistance is reduced by 35%-50%, and the draft is reduced by 40%-60% along with speed increase; the problems that a traditional seaplane is large in water resistance and difficult to leave water are effectively solved, meanwhile, the left buoy and the right buoy are in linkage with the attitude control system, wave disturbance can be counteracted in real time, the transverse inclination angle is controlled within 1 degree, the wave resistance is improved to be capable of coping with waves with the height of 1.5 m, and the defects that a traditional seaplane is poor in wave resistance and has strict requirements for taking-off and landing water areas are overcome.

The invention discloses a one-dimensional heat flux density measuring device based on the Fourier law, and relates to the technical field of object heat flux density measurement. Comprising a heating unit, a sealing heat insulation unit, a cooling unit, a temperature acquisition unit and a data processing unit. The sealing heat insulation unit comprises a heat insulation material, an aluminum oxide ceramic tube, a sealing air layer, an outer layer supporting plate and a rubber or silica gel sealing ring. The heating unit comprises a high-temperature copper plate heating platform; the cooling unit comprises a water cooling head, a cooling water jacket and a cooling water tank, and is nested at the top of the sealed heat insulation unit; according to the temperature acquisition unit, a thermocouple is attached to the surface of a measured object and is connected with an external thermodetector; the data processing unit comprises an acquisition terminal and a computer, the acquisition terminal is connected with a USB interface of the computer and a USB interface of the thermodetector, and data acquired by the thermodetector is transmitted to the computer. The invention provides the heat flux density measuring device which is simple and convenient to assemble, low in construction cost and simple and convenient to calculate, and the measuring efficiency is improved.

The invention provides a three-dimensional frequency selector based on slow-wave loading slot lines, which comprises a plurality of slow-wave loading slot line units arranged periodically, and is characterized in that the slow-wave loading slot line units adjacent to each other along an x axis are separated by air layers to form periodic gaps in the x-axis direction; the adjacent slow wave loading slot line units along the y axis are directly connected; and the slow wave loading slot line unit comprises a slot line along the z-axis direction and a T-shaped metal patch loaded in a slot line gap. According to the invention, through x-y plane two-dimensional periodic arrangement and z-direction slot line gap extension, a three-dimensional structure is formed, and incident wave frequency selection is realized; after the T-shaped metal patch is loaded on the slot line, the equivalent electrical length is increased, and the phase velocity is reduced, so that the structure realizes the target space filtering characteristic under the condition of compact size.

An apparatus and system are provided to provide transpiration cooling for an airframe. An airframe includes a body that contains circuitry, a phase change material (PCM) that changes phase to a gas when cooling the circuitry, a fluid reservoir that retains the PCM in liquid and gaseous form, a vapor reservoir that retains the gas, a thermal sensor that detects a temperature of an external surface of the body, and a controller that control ejection of the gas from the vapor reservoir based on the temperature to control a thickness of a boundary air layer at the external surface. The controller also controls flow of the gas from the fluid reservoir to the vapor reservoir via a valve based on pressure in the vapor reservoir detected by a pressure sensor.

The invention discloses a frame type energy-saving curtain wall combination and bearing device, and belongs to the technical field of energy-saving curtain walls. A frame type energy-saving curtain wall set comprises two glass panels and glass protective edges, and the glass protective edges are arranged on the peripheries of the two glass panels. Glass mounting grooves are formed in the middle positions of the upper side and the lower side of the glass protective edge, first inserting grooves are formed in the groove bottoms and the side walls of the glass mounting grooves, and side sealing strips and middle sealing strips are inserted into the first inserting grooves. According to the frame type energy-saving curtain wall combination and bearing device, the design of double glass panels is adopted, a sealed air layer is formed between the double glass panels, heat conduction and sound wave transmission are effectively blocked, the heat preservation performance and the sound insulation performance of a building are remarkably improved, energy consumption is reduced, and the indoor environment comfort degree is improved; a high-strength rectangular connecting frame is formed through a double-inserting-connection structure formed by the inserting columns and the second locking plates and through the combination of self-tapping screws for final fastening.

The broadband circular polarization conformal antenna adopts the combination of three layers of dielectric substrates and an air layer, and comprises an upper layer dielectric substrate, a middle layer dielectric substrate, a lower layer dielectric substrate, a central 2 * 2 corner cut square patch, a peripheral 16 corner cut square patch, a square feed patch with a rectangular groove formed along a diagonal line, a metal floor and a feed microstrip line, a metasurface structure is printed on the upper surface of the upper-layer dielectric substrate 1 and comprises a 2 * 2 corner cut square patch array 4 located in the center and 16 corner cut square patches 5 surrounding the center array; a square feed patch and a feed microstrip line are printed on the lower surface of the middle-layer dielectric substrate 2, the square feed patch is located at the dead center of the lower surface of the middle-layer dielectric substrate, and a rectangular groove is formed in the dead center of the square feed patch in the diagonal direction; and a complete metal floor is arranged on the lower surface of the lower dielectric substrate. The antenna has the characteristic of low profile, and the antenna can be conformal to a cylindrical surface carrier platform.

A preparation method and application of a flexible iron carbonyl inverted pyramid metamaterial thin film, which relate to the preparation method and application of electromagnetic absorption metamaterials. It is intended to solve the technical problems of the existing metamaterials having fixed functions after processing and narrow absorption frequency bands at a fixed thin thickness. The method includes: adding iron carbonyl powder, dibutyl phthalate, and tributyl phosphate into a PVB binder to prepare a slurry; then casting and drying the slurry on a glass substrate to obtain a cast film; laminating the cast films and engraving periodic units, and then laminating and assembling the periodic units into an inverted pyramid structure to obtain a metamaterial thin film. A film of about 2 mm is directly attached to a metal plate to form an electromagnetic absorption flat component, and its absorption bandwidth covers about 12.4 GHz - 18.5 GHz; the film is bent and covered on the metal plate with an air layer of adjustable thickness, realizing dual-frequency absorption at about 6.8 GHz and 14.5 GHz. This multifunctional thin film can be used in the field of wave absorption.

The utility model relates to the field of knitted fabrics, and provides a knitted fabric capable of being freely cut, the knitted fabric capable of being freely cut is of a double-faced weft knitting air layer tissue structure, and the knitting pattern of the knitted fabric capable of being freely cut takes six-way patterns as a cycle; the six paths of patterns are as follows: the first path is floating threads, tucking, tucking and floating threads; the second path and the fifth path are loops, loops, floating threads and floating threads; the third path and the sixth path are floating threads, floating threads, looping and looping; and the fourth path is tucking, floating thread, floating thread and tucking. Compared with the prior art, the knitted fabric capable of being freely tailored has the advantages that the hemming property, the raveling property and the dropping property of the fabric are greatly improved through mutual association and combined action of a special organization structure and a knitted pattern, and the requirement of a customer on free tailoring can be met; meanwhile, the skin-friendly softness of the fabric is also ensured.

The invention discloses a mechanical non-resonant one-bit phase electromagnetic reflection metasurface unit, and belongs to the field of artificial electromagnetic materials. The unit comprises a non-resonant electromagnetic structure and a mechanical driving device. The non-resonant electromagnetic structure comprises a dielectric layer, an air layer and an adjustable metal backboard from top to bottom; the mechanical driving device adopts a bidirectional self-holding electromagnet, a screw rod of the bidirectional self-holding electromagnet is connected with the metal back plate, the back plate is driven to be switched between two preset positions through forward / reverse pulse current, the thickness of an air layer is accurately adjusted, and therefore one-bit dynamic switching of a reflection phase between 0 degree and 180 degrees is achieved through propagation phase accumulation. In the 5G millimeter wave frequency band of 20 GHz to 29.5 GHz, the reflection coefficients of the two states are both larger than 0.99, the phase difference is stabilized within 180 degrees + / -20 degrees, and good robustness is achieved for mechanical displacement deviation. The unit has the advantages of zero static energy consumption, low insertion loss, wide bandwidth, simple structure and simple control, and is suitable for a low-power-consumption intelligent reflecting surface and a dynamic beam forming system.

The utility model discloses photovoltaic direct-drive type heat storage heating equipment, and relates to the technical field of heating devices. The utility model provides photovoltaic direct-drive type heat storage and heating equipment which comprises a shell, a heat storage device and a heat supply device. The heating piece is arranged in the containing cavity, and a heat storage piece is arranged on the periphery of the heating piece; wherein a first air layer is arranged between the heat storage part and the top wall of the shell, and a second air layer communicated with the first air layer is arranged between the heat storage part and the bottom wall of the shell; the top wall of the shell is provided with an air outlet communicated with the first air layer, and the bottom wall of the shell is provided with an air inlet communicated with the second air layer; and the size of the air outlet is adjustable, so that heat generated by the heating piece can be selectively led out from the air outlet or heat the heat storage piece.

The present application provides a wide-angle incident color-insensitive mid-infrared window film, which is structured from bottom to top as a base material G, a transition layer M1, a transition layer M2, a dielectric film system C, and an air layer A. The purpose of the present application is to achieve high transmittance of the infrared window in the mid-infrared spectral range under wide-angle incidence of 0-60°, while having the color-insensitive characteristic to visible light. The transition layer is composed of two oxides for improving the firmness of the film layer. The dielectric film system structure is composed of high and low refractive index materials deposited alternately, and the dielectric film system can ensure high transmittance of the infrared window in the mid-wave band range under wide-angle incidence, while having the color-insensitive characteristic to visible light. The wide-angle incident color-insensitive mid-infrared window film of the present application can be widely applied in the field of optical detection, imaging and other optical systems.

The utility model relates to building energy -saving technical field solves the problem that traditional hollow glass depends on air layer heat insulation, but the heat conductivity coefficient is higher, and the energy -conserving effect is limited, and low emissivity coated glass needs to cooperate inert gas filling, and the process is complex and the durability is insufficient. Specifically, a glass heat insulation assembly, including outer glass, the front of outer glass is equipped with the snap -groove, the inside of snap -groove is provided with first adhesive layer, the front of first adhesive layer is provided with heat insulation assembly, the front of heat insulation assembly is provided with second adhesive layer, heat insulation assembly includes fixedly connected in first adhesive layer target flexible heat insulation core layer, the front of flexible heat insulation core layer is fixedly connected with reflection film layer, the front of second adhesive layer is fixedly installed with toughened glass, the outer surface of second adhesive layer is fixedly connected with first elastic heat conduction adhesive tape, the edge of outer glass is fixedly connected with second elastic heat conduction adhesive tape, and second elastic heat conduction adhesive tape is used for the edge of outer glass seal.

The present application relates to a kind of variable stiffness superstructure sound insulation board, including from outside to inside sequentially stacked connection outer panel, damping layer, intermediate partition, porous sound absorption layer and inner panel;Air layer is provided between two damping layers;First rib assembly is provided in air layer, second rib assembly and third rib assembly are provided in porous sound absorption layer;First rib assembly includes multiple mutually intersecting fixed horizontal rib and vertical rib, and multiple columns of small ribs are differentially distributed on horizontal rib and / or vertical rib;The structure of third rib assembly is consistent with first rib assembly, and the rib of third rib assembly is inserted into porous sound absorption layer, and insertion depth is 10% to 90% of the thickness of porous sound absorption layer;First rib assembly, second rib assembly and third rib assembly jointly constitute variable stiffness system.Compared with prior art, the present application has the advantages of improving broadband sound insulation performance, filling sound insulation trough, adapting to widely used scenarios, synergistic optimization of sound insulation, vibration reduction and sound absorption, etc.

The utility model relates to the field of chemical oxygen generation and heat insulation, in particular to an onboard chemical oxygen generator with a heat insulation structure, which comprises a starting mechanism, a starting base detachably connected with the lower end of the starting mechanism, an upper connecting piece, a lower connecting piece and a heat insulation structure, the inner circumferential surface of the top end of the inner tank body is fixed with the outer circumferential surface of the lower end of the upper connecting piece; the upper end of the outer circumferential surface of the lower connecting piece is fixed with the inner circumferential surface of the bottom end of the inner tank body; due to the fact that the outer tank body is adopted and the annular space is formed between the outer tank body and the inner tank body, the problem that the temperature of the outer surface of the inner tank body is too high due to the fact that heat is generated in the inner tank body is effectively solved, and the temperature of the outer tank body meets the standard due to the fact that the static air layer in the annular space between the inner tank body and the outer tank body is low in heat conductivity. Meanwhile, air heat insulation is adopted in the annulus, so that the overall weight is reduced, and the requirement of light-weight products is met.

The utility model relates to the technical field of retroreflective sheeting provides an environmental protection type hard PVC retroreflective sheet, solves the problem that the reflectivity of existing retroreflective sheet is low, and the optical performance is relatively weak, and the surface layer anti -peeling impact force is not good, including the retroreflective sheet body, the retroreflective sheet body includes the protective surface layer, prism air microcapsule layer, degradable back film layer from top to bottom sequentially laminated, the prism air microcapsule layer includes wall material and core material, the core material includes prism reflection matrix layer and air layer, the protective surface layer is by PVC material layer and acrylic material layer composite, the prism reflection matrix layer is by several microangle pyramid prism structure unit close arrangement, the microangle pyramid prism structure unit is cutting obtains to cubic angle pyramid prism.

The utility model provides a noise reduction structure, a fresh air module and an air conditioner. The noise reduction structure comprises an air inlet shell with an air inlet cavity and a noise reduction assembly arranged in the air inlet cavity. The noise reduction assembly comprises at least one medium-high frequency sound absorber and at least one low-frequency sound absorber. The medium-high frequency sound absorber and the low-frequency sound absorber are arranged in the airflow direction, a first air layer is arranged between the medium-high frequency sound absorber and the bottom wall of the air inlet cavity, and a second air layer is arranged between the medium-high frequency sound absorber and the low-frequency sound absorber. And / or, the medium-high frequency sound absorber and the low-frequency sound absorber are arranged in the direction perpendicular to the airflow direction, a third air layer is arranged between the medium-high frequency sound absorber and the bottom wall of the air inlet cavity, and a fourth air layer is arranged between the low-frequency sound absorber and the bottom wall of the air inlet cavity. According to the noise reduction structure, the noise reduction frequency band can be widened, the multiple noise reduction effect is achieved, and therefore the operation quality of the fresh air module is effectively improved, and the user experience is improved.

The present application belongs to the technical field of garment processing equipment, and particularly relates to an automatic ironing complete equipment for knitted sweaters. The present application has a reasonable structure design, and is mainly composed of a support, a circulating conveyor belt, a first pressing conveying mechanism, a second pressing conveying mechanism, a third pressing conveying mechanism and an ironing mechanism. On the one hand, the pressing conveying speed of the first pressing conveying mechanism, the second pressing conveying mechanism and the third pressing conveying mechanism is gradually increased, so that the knitted sweater fabric keeps a straight state when passing through the ironing mechanism during the conveying process, avoiding the occurrence of the situation that wrinkles affect the ironing effect. On the other hand, the ironing mechanism utilizes an atomizing spray pipe to perform independent humidifying operation, and utilizes the upper heat-conducting plate and the lower heat-conducting plate with the internal even-heating air layer to form an even-temperature assembly, which can perform even-temperature adjustment on the ironing temperature, avoiding the occurrence of the situation that the knitted sweater is difficult to repair deformation due to local overheating.