234 results about "Hydrophilic coating" patented technology

The invention belongs to the field of functional textile materials, and provides a one-way moisture-conducting breathable fabric based on a vinyl elastomer and a preparation method of the one-way moisture-conducting breathable fabric based on the vinyl elastomer. The hydrophilic coating contains a vinyl elastomer matrix, polyvinyl alcohol, a zwitterionic polymer and a cross-linking agent, the hydrophobic coating contains a vinyl elastomer matrix, vinyl-terminated polydimethylsiloxane, polyhedral oligomeric silsesquioxane and other components, the coatings are only attached to the surfaces of yarn fibers and do not block pores, and a wettability gradient structure is formed; the excellent performance that the static contact angle gradient in the thickness direction is larger than or equal to 50 degrees, the capillary water absorption height from the inner side to the outer side is larger than or equal to 3.0 cm / 10 min, the capillary water absorption height from the outer side to the inner side is smaller than or equal to 1.0 cm / 10 min, the moisture permeation amount is larger than or equal to 5000 g.m.24 h, and the air permeability after curing is 65% or above of a fabric base material is achieved, the technical problem that an existing fabric is insufficient in moisture conductivity and air permeability is solved, and wide application value is achieved.

This invention belongs to the field of membrane material preparation and modification technology, and relates to a method for pre-wetting the surface of a hydrophobic ceramic membrane. The ceramic membrane is immersed in a cyclohexane solution of perfluorooctyltrimethoxysilane for 3-4 hours. After immersion, the ceramic membrane is dried in an oven. An ethanol solution is forced to circulate through the ceramic membrane to pre-wet the separation layer. The pre-wetting process proposed in this invention is simple, highly controllable, and easily scaled up to pre-wet multi-channel hydrophobic ceramic membranes. This invention achieves coarse adjustment of the wetting degree by controlling the concentration of the ethanol-water solution, and further fine adjustment by combining the circulation time of the ethanol-water solution, thus achieving more precise control of the wetting degree and optimal improvement of the uniformity of the hydrophilic coating.

The invention discloses porous carbon with a gradient structure, a preparation method of the porous carbon and application of the porous carbon in a negative electrode of a lithium ion battery. The porous carbon has a gradient structure with compact micropores on the surface and loose macropores inside. The preparation method of the porous carbon comprises the following steps: carrying out oleophylic modification on SiO2 to obtain hydrophobic SiO2; carrying out hydrophilic coating on NH4Cl to obtain PVP (Polyvinyl Pyrrolidone) coated NH4Cl; the preparation method comprises the following steps: mixing coal pitch, methylbenzene, oleic acid, hydrophobic SiO2 and PVP (at) NH4Cl to form a suspension; preparing a spherical precursor by a micro-fluidic emulsification method; and carbonizing, sequentially carrying out oxygen plasma treatment and HF solution etching, and removing the template to obtain the porous carbon with the gradient structure. The gradient distribution of the template and the pore-forming agent is realized through surface modification difference and a microfluidic technology, the pore structure and the particle size can be accurately regulated and controlled, the process is simple, the compatibility is high, the prepared porous carbon can be used as a substrate for a silicon-carbon composite negative electrode material, the volume expansion of silicon can be effectively buffered, and the service life of the silicon-carbon composite negative electrode material is prolonged. And the first coulombic efficiency, the specific capacity and the cycling stability of the lithium ion battery are improved.

The invention provides high-caking low-dust tofu cat litter and a preparation method thereof.The high-caking low-dust tofu cat litter is prepared from, by mass, 40%-60% of bean dreg fiber, 15%-25% of antibacterial high-capacity ammonia adsorption modified zeolite, 8%-15% of a composite binder, 1%-2% of compound vegetable gum, 1%-5% of a hydrophilic coating agent, 0.5%-3% of a food-grade dust suppressant and the balance water. According to the invention, agglomeration is enhanced through composite bonding and zeolite embedding, dust is reduced through a triple dust control process, long-acting deodorization and antibiosis are realized by virtue of modified zeolite, the finished product block mass is free of looseness, low in dust, deodorant and antibacterial, and the process is simple, convenient, easy to industrialize, capable of being naturally degraded and suitable for daily cleaning and nursing scenes of family pet cats.

The invention discloses a modified sulfonated carbon material and a super-hydrophilic coating prepared from the modified sulfonated carbon material, and belongs to the technical field of hydrophilic coatings. The modified sulfonated carbon material is prepared from the following raw materials in parts by weight: 1 to 10 parts of sulfonic carbon material, 1 to 15 parts of inorganic nano filler, 10 to 20 parts of organic hydrophilic filler, 30 to 60 parts of organic solvent, 0.1 to 20 parts of water and 0.5 to 5 parts of catalyst. The preparation method comprises the following steps: firstly, adding the sulfonyl carbon material, the inorganic nano filler and the organic hydrophilic filler into the organic solvent, then adding water, stirring and ultrasonically dispersing for 10-30 minutes, adding the catalyst into the obtained mixed liquid, continuously reacting for 1-6 hours at 70-90 DEG C, and carrying out suction filtration and washing to obtain the modified sulfonyl carbon material. By modifying the carbon material, the obtained super-hydrophilic coating has excellent corrosion resistance and hydrophilic performance.

The invention relates to the technical field of hydrophilic coating equipment, in particular to LED hydrophilic coating equipment which comprises a machine box, a clamp used for conveniently and rapidly clamping a product is arranged at the top of the machine box, a solution pipe bin is arranged at the bottom of the machine box, and a lamp set used for irradiating the outer surface of the product is arranged in the machine box. A first driving assembly and a second driving assembly are additionally arranged in the machine box, the first driving assembly is used for driving the clamp to ascend and descend in the vertical direction, the second driving assembly is used for driving a product to rotate in the horizontal direction, and the clamp comprises a supporting plate and a plurality of clamping heads. The multiple chucks are evenly distributed on the top of the supporting plate at intervals and used for clamping and positioning products. The purpose of the invention is to optimize the product coating process, so that the solution of the coating can be more uniformly coated to the peripheral side of the product, thereby being beneficial to improving the uniformity of the product coating, and being beneficial to guaranteeing the quality of subsequent curing molding of the product.

The pleating and folding integrated device comprises a base, a rotating disc and a plurality of pleating heads, and the base is used for clamping and fixing a balloon; the turntable is rotatably connected to the base and is used for realizing rolling, holding and folding of the balloon; the multiple pleating heads are movably installed on the rotary disc so that pleating of the balloon can be achieved. After the balloon is pleated, the balloon is directly folded, the folding effect is better, the step of transferring the balloon in the pleating and folding process is omitted, the situation that the balloon is scratched due to the fact that the balloon is transferred between different working heads can be avoided, the phenomenon that a hydrophilic coating or a medicine coating of the balloon is incomplete or falls off is prevented, and the balloon is more stable in performance. The product pleating and folding qualification rate is improved, and the operation effect is prevented from being affected.

The invention discloses waterborne polyester as well as a preparation method and application thereof. The preparation method comprises the following steps: putting an intermediate compound into a pre-polycondensation product to carry out polycondensation reaction; wherein the pre-polycondensation product is a product obtained by adding an auxiliary agent into an ester and carrying out polycondensation reaction until the hydroxyl value reaches 80 mgKOH / g-100 mgKOH / g, the chemical structural formula of the ester is shown in the specification, R1, R2 and R3 are independently selected from C4-C12 alkyl groups or aryl groups, R4 and R5 are independently selected from C2-C9 alkyl groups; the chemical structural formula of the intermediate compound is shown in the specification, R6 is C3-C6 alkyl, and R7 is methyl or ethyl. The super-hydrophilic coating prepared from the water-based polyester prepared by the method has super-hydrophilicity, high wear resistance and long service life, and is suitable for the fields of building glass, medical equipment, automobile glass, electronic screens and the like which require antifogging, self-cleaning and durability requirements.

This invention provides a flexible pressure sensor with a hydrophobic-philic-hydrophobic structure and its fabrication method. The flexible pressure sensor includes a protective layer, an electrode layer, and a sensing layer. The protective layer comprises a first hydrophobic coating, a first hydrophilic coating, and a second hydrophobic coating sequentially distributed. The electrode layer is composed of a flexible, breathable, and conductive substrate. The sensing layer includes a first flexible, breathable support. The first hydrophobic coating is adjacent to the electrode layer. The resulting flexible pressure sensor with a hydrophobic-philic-hydrophobic structure possesses excellent waterproof and moisture-proof properties, breathability, and high sensitivity (>8.9 kPa). ‑1 Furthermore, its sensor signals exhibit good long-term stability.

The application discloses a moisture-absorbing and sweat-releasing polyester low-elasticity filament, which comprises 85-95 parts of a copolymer type moisture-absorbing modified polyester chip, 3-8 parts of toughening compatible master batch and 2-7 parts of anti-oxidation lubrication functional master batch, and a preparation method of the moisture-absorbing and sweat-releasing polyester low-elasticity filament, which comprises the following steps: S1, drying raw materials; S2, melt extrusion; S3, pre-setting of a special-shaped section; S4, spinning cooling; S5, stretching and elasticizing; S6, wave curling setting; and S7, winding forming. According to the application, the section structure of the polyester low-elasticity filament is improved, the symmetrical crescent concave groove penetrating through the axial direction is formed, the natural capillary wetness guide path is constructed according to the inherent form of the filament body, the modification of the chemical hydrophilic coating is not needed, the integrated section groove structure is stable, the appearance can be kept complete after the weaving friction and multiple water washing, the long-lasting wicking water conveying capacity of the fabric is endowed from the fiber origin, and the disadvantage of the wetness performance attenuation after long-term use is avoided.

The invention discloses a polymer hydrophilic coating in the field of biomedical materials, a preparation method of the polymer hydrophilic coating and application of the polymer hydrophilic coating in medical catheters. The coating achieves excellent performance through the synergistic effect of two newly designed modified compounds. Wherein the phosphorylcholine silane functionalized polyethyleneimine is used as a matrix material and provides hydrophilicity and anticoagulant activity; and the nano silicon dioxide anchored polyhexamethylene biguanide is used as a functional filler, so that the coating is endowed with antibacterial property and mechanical enhancement. During preparation, all the components are sequentially dissolved in water to form a uniform solution, transparent sol is formed through silane hydrolysis, then the pretreated guide pipe is subjected to dip coating, and a final product is obtained through preheating, ultraviolet light curing and heat curing treatment. The coating obviously reduces the surface friction coefficient, has lasting hydrophilicity, efficient antibacterial property and excellent blood compatibility, is firmly combined with a base material, and is particularly suitable for surface functional modification of various interventional medical catheters.

The utility model discloses gas -liquid separation devices are used in machine pumping liquid gas recovery, belong to oil and gas exploitation equipment technical field, the present application sets up a variety of separation mechanism, including buffer mechanism, positive rotation separation subassembly, reverse rotation separation subassembly and condensing mechanism, wherein buffer mechanism is used for preliminary separation gas -liquid mixture and prevents liquid splashing, and the positive rotation separation subassembly and reverse rotation separation subassembly that are equipped with hydrophilic coating are used for the centrifugal force that produces simultaneously produces centrifugal force and throws out the water drop that condenses on its surface to the upward flow guiding natural gas, and the positive reverse flow guiding design can make hydrophilic coating and gas fully contact, increase condensation efficiency, and the condensing mechanism further reduces the moisture content in natural gas through condensing water removal operation, and the moisture in natural gas can be better removed through the cooperative operation of multiple separation mechanisms, which is convenient for subsequent treatment and storage of natural gas.

A hydrophilic composition that includes at least one of an organic silicon compound represented by formula (1), a condensate of an organic silicon compound represented by formula (1), and the product of reacting an organic silicon compound represented by formula (1) and metal oxide particles makes it possible to obtain a hydrophilic coating film that has excellent durability. (In the formula, the R1s each independently represent a hydrogen atom, a C1–10 alkyl group, or a C6–10 aryl group, the R2s each independently represent a C1–10 alkyl group or a C6–10 aryl group, X represents a hydrogen atom, a k-valent metal cation, or an ammonium cation, k is 1 or 2, provided that k is 1 when X is a hydrogen atom or an ammonium cation, m is an integer from 1 to 10, inclusive, and n is an integer from 1 to 3, inclusive.)

The invention discloses a moisture-absorbing and quick-drying cool-feeling fabric and a preparation method thereof, and relates to the technical field of fabrics, and the technical scheme is characterized in that the fabric is obtained by interweaving multi-component yarns; the multi-component yarns comprise 40S imitated cotton yarns, 26S fine compact yarns and 75D Sorona yarns; the fabric comprises 40-45 wt% of cotton and 55-60 wt% of polyester in percentage by mass; wherein the 40S imitation cotton yarns are hydrophilic modified imitation cotton yarns grafted by carboxyl modified acrylate monomers. According to the invention, the 40S imitated cotton yarn is subjected to microporous spinning and carboxyl modified acrylate monomer grafting, and is coordinated with cross-shaped special-shaped section spinning of the 26S refined compact yarn and interweaving of the fluoride-free hydrophilic coating and the 75D Sorona yarn, so that the moisture-absorbing and quick-drying effects are remarkably improved, the functional stability is enhanced, and the moisture-absorbing and quick-drying effects are improved. The effect of improving the durability and the cool feeling of the fabric is achieved.

The invention relates to hydrophilic coating equipment for an angiographic catheter and a coating method, and belongs to the technical field of interventional medical instruments. The equipment comprises a cabinet body, two solution tanks, a guide pipe dip-coating curing mechanism and a first moving module, the guide pipe dip-coating curing mechanism comprises a guide pipe dip-coating assembly, a second moving module and a curing assembly. The catheter dip-coating assembly comprises a supporting thin tube capable of extending into an inner cavity of the angiographic catheter and a blocking piece at the far end of the supporting thin tube. The curing assembly comprises an air blowing unit arranged around the angiographic catheter and a pre-curing light source. In the process that the angiographic catheter is lifted upwards from the solution tank, the air blowing unit blows air to the outer surface of the catheter, and meanwhile the pre-curing light source conducts irradiation curing. According to the method, blowing and pre-curing are combined, the sagging phenomenon of the hydrophilic solution caused by gravity is effectively restrained, and therefore the problems that the thickness of a coating is not uniform and the end of the catheter is accumulated are solved, and the uniformity and quality stability of the coating are improved.

The invention discloses a composite structure design method of a coaxial sleeve type middle-deep buried pipe, which comprises the following steps: determining the pipe diameter of the buried pipe and calculating the thickness of a hydrophilic coating of an outer pipe, carrying out fluid dynamic simulation according to the pipe diameter of the buried pipe, determining a heat exchange objective function, and carrying out parameter optimization in a convex tooth parameter range of the outer pipe to obtain an optimal convex tooth parameter of the outer pipe. The thickness of a hydrophobic coating on the surface of the inner pipe is determined, a coaxial sleeve type medium-deep buried pipe is arranged, system operation data is obtained, temperature deviation is calculated, thermal short circuit judgment is conducted, system operation parameters are adjusted, and the effective heat conductivity coefficient of an inner pipe filling material and the thermal resistance of the inner pipe are calculated; and performing nonlinear mapping on the effective heat conductivity coefficient of the inner pipe filling material to obtain the adjusting density of the inner pipe filling material for dynamic thermal insulation regulation and control. According to the method, the heat taking efficiency of the outer pipe and the heat preservation capacity of the inner pipe can be improved, so that thermal short circuit is remarkably inhibited, the overall energy efficiency of the system is enhanced, and the method has great significance in promoting large-scale efficient application of the medium-deep geothermal technology.

A curing system 2 for curing hydrophilic coatings on urinary catheters 12. The curing system has a curing unit 14 with a curing compartment 22 wherein curing radiation is reflected within the curing compartment and the catheters pass through the curing compartment in a continuous or stepwise manner. Optionally, the curing may include heat curing in addition to radiation curing.

The application discloses a kind of infiltration auxiliary hydrophilic coating drainage catheter related to drainage catheter technical field.It includes the adhering plate, the adhering plate is provided with through-hole, the adhering plate is provided with the infiltration shell in its through-hole, the infiltration shell is provided with infiltration hole, the infiltration hole of the infiltration shell is slidably connected with catheter, the infiltration shell is provided with the liquid guide hole being communicated with the guide groove, the adhering plate is slidably connected with the connecting pipe being communicated with the liquid guide hole of the infiltration shell, the connecting pipe is communicated with the liquid storage sac at the end away from the infiltration shell.The hydrophilic liquid in the liquid storage sac is made into the guide groove by extruding the liquid storage sac, the hydrophilic liquid is filled in the lower side of the guide groove, and the hydrophilic liquid is immediately contacted with the surface of the catheter and infiltrated, so that the risk of infection of the patient's incision is reduced.

The invention discloses a preparation method and application of a hydrophilic separation medium, the hydrophilic separation medium comprises a polymer hydrophilic medium and a hydrophilic group modified on the surface of the medium, the solid medium is PS / GMA / DVB microspheres, and when in use, the hydrophobic separation medium comprises a PS / GMA / DVB solid matrix and a hydrophilic coating layer coated on the surface of the PS / GMA / DVB solid matrix. The hydrophilic coating layer is used for modifying hydrophilic groups through epoxy groups and benzene ring chemical bonds, and the hydrophilic coating layer is introduced to the surface of the PS / GMA / DVB solid substrate, so that the surface of the hydrophobic PS / GMA / DVB solid substrate is effectively coated in the coating layer, and therefore, the hydrophilic action separation medium can avoid the adverse effect of the hydrophobic substrate on separation of polysaccharide, and the separation efficiency of the PS / GMA / DVB solid substrate is improved. The PS / GMA / DVB solid matrix is a polymer microsphere prepared by taking a polystyrene-glycidyl methacrylate-divinyl benzene polymer as a matrix, and compared with a silica gel matrix, the PS / GMA / DVB solid matrix can enable the separation medium to have more excellent chemical stability and modification activity.

The invention relates to the technical field of intelligent sensing systems, and discloses a formaldehyde and total volatile organic compound detection device and detection method.The formaldehyde and total volatile organic compound detection device comprises a pretreatment filter screen with a hydrolyzable hydrophilic coating on the surface; the pressure difference monitoring module is used for outputting a pressure difference monitoring value reflecting the permeability of the pretreatment filter screen; the reference gas providing module is used for continuously generating and conveying clean air; the differential sensing module is used for providing a background reference signal for the processor; and the processor is used for dynamically compensating the detection value of the gas sensor according to the physical blockage state of the pretreatment filter screen. According to the invention, hydrated dust is actively captured and removed, an error is judged by analyzing a physical signal provided by the differential pressure monitoring module and an electrical signal provided by the differential sensing module, and finally, a compensation coefficient is dynamically generated to correct the reading of the detection device in real time, so that the credibility of a detection result of the detection device is improved.

This invention discloses a load 32 The preparation method of the ultrathin sheet-like chitosan hydrogel applicator of P includes: (1) preparing a chitosan aqueous solution; (2) adding methacrylic anhydride to the chitosan aqueous solution to obtain methacrylated chitosan; (3) preparing a methacrylated chitosan aqueous solution; (4) adding 2-hydroxy-4′-(2-hydroxyethoxy)-2-methylphenylacetone to the methacrylated chitosan aqueous solution to obtain a chitosan hydrogel precursor solution; (5) coating the inner wall of a polytetrafluoroethylene mold with a superhydrophilic coating; (6) adding Na2H 32 PO4 aqueous solution and chitosan hydrogel precursor solution are added to the mold, stirred and then cured by light; (7) the cured hydrogel is taken out and sealed between two layers of transparent tape. This application can prepare an ultra-thin hydrogel applicator, thereby reducing the obstruction of radiation by the hydrogel material itself and enhancing the therapeutic effect of the applicator.

The present application relates to air pollution particle control technical field, especially to a kind of dehumidification dust removal device and dehumidification dust removal method.The device includes filter cartridge and louvre flow guide device arranged annularly around the filter cartridge by inside and outside sequentially, the top of the filter cartridge is provided with clean gas outlet, the components of the louvre flow guide device include hoop beam and flow guide vane, wherein the flow guide vane is arranged around the filter cartridge, and the upper and lower ends of the flow guide vane are limited as cylindrical by the hoop beam, and there is gap between adjacent two flow guide vanes;Hook-shaped water collecting tank is located between the filter cartridge and the louvre flow guide device, and the inner wall of the hook-shaped water collecting tank is hydrophilic coating, for trapping moisture in the moisture and dust-containing gas.The dehumidification dust removal device of the present application can effectively dehumidify and remove dust, and the dehumidification rate reaches more than 50%, and the dust removal rate reaches more than 99%.

Embodiments of the present disclosure relate to anti-fog glass, a vehicle, and a method of manufacturing anti-fog glass. The anti-fog glass comprises: a glass body, which is single-layered or arranged in a multi-layer stack; an active anti-fog layer arranged on the glass body and configured to heat up in an energized state; and a passive anti-fog layer arranged on the glass body and configured to inhibit fog formation on the passive anti-fog layer, wherein the passive anti-fog layer is a super-hydrophobic coating and / or a hydrophilic coating. In embodiments according to the present disclosure, the active anti-fog layer and the passive anti-fog layer are arranged on the glass body simultaneously to prevent the formation of fog. In this way, in the area of the glass body that is not covered by the active anti-fog layer, the passive anti-fog layer can achieve a certain degree of anti-fog function; in addition, in the area where the passive anti-fog layer itself cannot provide the required anti-fog level, the active anti-fog layer can work together with the passive anti-fog layer to provide better anti-fog effect.

The invention discloses a high-stain-resistance texture sandstone coating combination system and a preparation method thereof, and belongs to the technical field of water-based building coatings and preparation. According to the invention, a composite system of hydrophobic texture sandstone paint and hydrophilic finishing varnish is adopted, and the wax emulsion is introduced into the texture sandstone paint, so that a coating film is endowed with lasting hydrophobicity, and permeation type pollution is remarkably inhibited; the finishing varnish takes epoxy silane coupling agent modified silica sol as a main hydrophilic component and is compounded with a proper amount of organic silicon additive, so that the overall stain resistance is further improved on the premise that the hydrophilicity is not reduced. According to the composite coating system adopted in preparation, the inherent defects of a single hydrophobic or hydrophilic coating film are avoided, and the overall stain resistance is cooperatively improved.

To provide an aluminum-made fin material capable of improving appearance by blackening a surface, having excellent hydrophilicity, and capable of suppressing adhesion of dew condensation water SOLUTION: The aluminum-made fin material 10 has an aluminum sheet 1 and a film layer 2 formed on the surface of the aluminum sheet 1. The coating layer 2 has a corrosion-resistant resin coating layer 3 and a hydrophilic coating layer 4 in this order from the aluminum sheet 1 side. The corrosion-resistant resin coating layer 3 contains a black pigment 6 and a dispersion aid, the black pigment 6 is at least one selected from carbon black, a metal inorganic compound-based pigment, and an organic pigment, a mass ratio of the black pigment 6 to a total mass of the corrosion-resistant resin coating layer 3 is 35 mass% or less, a mass ratio of the dispersion aid to a mass of the black pigment 6 in the corrosion-resistant resin coating layer 3 is 10 mass% or more, and an L * value in an L * a * b color system measured on the surface of the aluminum-made fin material 10 by a spectrophotometer is 83 or less.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of medical instruments, in particular to an environment-friendly super-hydrophilic medical beauty needle which comprises an injection tube, a needle head is further arranged at the front end of the injection tube, a hydrophilic coating is arranged on the outer surface of the needle head, a lantern ring is sleeved on the outer side wall of the injection tube in a sliding mode, and the lantern ring and a piston rod ascend and descend synchronously. A plurality of quantitative plates are further rotationally arranged on the outer side wall of the injection pipe and distributed on the same side of the injection pipe at equal intervals, and notches are formed in the positions, corresponding to the quantitative plates, of the lantern ring. According to the utility model, the hydrophilic coating is arranged on the outer surface of the needle head and can reduce the friction between the needle head and the skin during injection, so that the injection process is smoother and more comfortable, and the hydrophilic coating can form a water film matched with a water film on the surface of human tissue on the surface of the injection needle head; the lubricating effect can remarkably reduce pain and discomfort during injection, and the injection experience of a patient is improved.

The invention provides a surface treatment method of an air source heat pump heat exchanger and the air source heat pump heat exchanger. The surface treatment method comprises the steps that the air source heat pump heat exchanger is provided, the surface of the air source heat pump heat exchanger is provided with a hydrophilic coating, and the air source heat pump heat exchanger is provided with an air inlet side and an air outlet side which are opposite; the air inlet side is subjected to hydrophobic treatment to form a hydrophobic part, and the air outlet side which is not subjected to hydrophobic treatment is a hydrophilic part; wherein the hydrophobic treatment on the air inlet side comprises the step of selecting at least one of a water-based coating, an oil-based coating and a powder coating based on the structure of the air source heat pump heat exchanger; and carrying out at least one of dip-coating, shower-coating and spray-coating on the air inlet side based on the coating type so as to form a hydrophobic part. When the heat exchanger works under the low-temperature and high-humidity conditions, condensed liquid drops of the hydrophobic parts are separated and then adsorbed by the hydrophilic parts, and flow away along the fins under the action of gravity, so that the heat exchanger has the frost restraining performance, and meanwhile the problem of water blowing and freezing is solved.

The guide extension catheter comprises an extension tube, a push rod and a push handle, the extension tube comprises an inner layer, a reinforcing layer and an outer layer, the reinforcing layer is located between the inner layer and the outer layer, the reinforcing layer is a stainless steel woven mesh, the weaving density PPI is larger than or equal to 150, first developing rings and second developing rings are distributed on the reinforcing layer at intervals, the first developing rings are made of platinum, and the second developing rings are made of platinum. The second developing ring is made of nickel-titanium alloy, the pushing rod and the second developing ring are integrally formed, the pushing rod extends to the pushing handle along the extension tube, and the outer layer of the extension tube and the pushing rod are coated with hydrophilic coatings. According to the scheme, the pushing rod is connected with the extension pipe without welding, the risk that welding spots are broken in the using process of the guide extension catheter is eliminated, the coaxiality of the pushing rod and the extension pipe is better, and the better pushing performance is achieved.

The invention discloses a condensation system for polyethylene pipeline production. The condensation system solves the three problems of uneven condensation, drainage blockage and heat conduction attenuation of a traditional system. According to the scheme, the structure is innovated, namely, a PEXb condensation pipe network coated with a TiO2-SiO2 nano hydrophilic coating (the contact angle is smaller than or equal to 15 degrees) is adopted, the inner wall is subjected to plasma polishing (Ra is smaller than or equal to 0.5 micron), and a vacuum jet drainage device (the gradient requirement is smaller than or equal to 0.3%) is combined; intelligent control is used, namely, the cooling temperature (Tc-Tdew is smaller than or equal to 1.5 DEG C) is dynamically adjusted based on a dew point PID algorithm, and an infrared array and a conductivity sensor are integrated to achieve temperature difference scaling early warning; long-acting maintenance is carried out, namely a built-in high-frequency electromagnetic descaling device (the scale inhibition rate is larger than or equal to 90%) and a self-flushing mode (72h / 0.8 MPa pulse cleaning) are carried out; condensation uniformity is larger than or equal to 95%, and heat exchange efficiency is improved by 25%. The unit energy consumption is reduced to 6.4 kWh / m < 3 > (the reduction amplitude is 22%); the heat conduction attenuation rate is less than or equal to 3% / year, and the system service life reaches 15 years.

The present disclosure relates to the field of medical device technology, and in particular, to an endoscope catheter. In the endoscope catheter provided by the embodiments of the present disclosure, by disposing a coating region and a transition region on a surface of a catheter body and disposing a hydrophilic coating in the coating region, a stable hydrogel film is formed on the surface of the coating region of the catheter body. After being activated by normal saline, the hydrophilic coating exhibits good lubricity, flexibility, and adhesion. Moreover, the hydrophilic coating is only applied to the coating region of the catheter body but not to the transition region, which effectively prevents the hydrophilic coating from entering the interior of the catheter body through a connection gap between the catheter body and a catheter front end during the application and thus affecting normal use. The present disclosure alleviates the technical problem of excessive friction between the existing endoscope catheters and human tissues in the prior art.