26results about How to "Reduce shrinkage" patented technology

The invention provides a manufacturing and using method of a multi-layer co-extrusion film, and belongs to the technical field of plastic film manufacturing, the multi-layer co-extrusion film comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with a three-layer tower-type frame, the bottom plate and the three-layer tower-type frame are provided with a film drawing mechanism, the two sides of the three-layer tower-type frame are connected with adjusting mechanisms, and the adjusting mechanisms are arranged on the bottom plate. The inner wall of the adjusting mechanism is connected with a mold guiding mechanism, the extruders and the blowing machine are arranged below the three-layer tower type frame, and the multiple extruders communicate with the blowing machine. Lifting of a fixed plate is achieved through an electric telescopic rod, contact between a contact wheel and the surface of a film bubble is matched, if the air outlet amount is large, the force borne by expansion of the film bubble is large, the contraction degree of a movable rod is large, and otherwise, the contraction degree of the movable rod is small, so that the sliding process of the movable rod is completed; at the moment, the moving degree of the moving rod and the stress degree of the film bubbles can be obtained through the first pressure sensor and the second pressure sensor, and therefore the air outlet amount can be conveniently controlled.

The invention provides a cross-linked polybenzimidazole membrane as well as a preparation method and application thereof. The cross-linked polybenzimidazole membrane comprises a cross-linked network structure, main raw materials of the crosslinked polybenzimidazole membrane comprise polybenzimidazole, a crosslinking agent and a pore forming agent, the crosslinking agent is a diepoxy compound or a silane coupling agent with an epoxy bond, and the addition amount of the crosslinking agent relative to the polybenzimidazole is 2wt%-10wt%. The cross-linked polybenzimidazole membrane is high in mechanical strength, good in mechanical stability, low in swelling rate in electrolyte and high in durability; the cross-linking agent and the pore-forming agent selected in the invention can ensure that the cross-linked polybenzimidazole membrane forms a cross-linked network structure.

The invention relates to the technical field of dust removal, in particular to dust removal equipment for a Raymond grinder, which comprises a shell, a bracket, a filter bag and a knocking assembly, the support is fixed in the shell, and the filter bag is sleeved outside the support; the knocking assembly is arranged in the filter bag and comprises a track ring and a knocking rod, and the knocking rod is slidably installed on the support and connected with the support through an elastic piece. A plurality of track grooves are formed in the track ring and are coaxial with the rotating axis of the track ring, and the diameters of the track grooves are sequentially increased; the track ring is further provided with a through groove communicating with the multiple track grooves. The knocking rod reciprocates to impact the filter bag under the limitation of the wave crest groove and the wave trough groove in the elastic piece and the track groove. And when the bump gradually moves from the track groove with the smallest diameter to the track groove with the largest diameter, the impact of the knocking rod on the filter bag is converted from low-frequency heavy impact to high-frequency light impact and is matched with the blockage condition of the filter bag, the damage to the filter bag can be reduced, the cleaning effect is ensured, and meanwhile, the service life of the filter bag is prolonged.

The present application relates to the technical field of biomedicine, and specifically discloses a sodium alginate embolic particle and its preparation method and application. The preparation method of the sodium alginate embolic particle disclosed in the present application comprises the following steps: dissolution, primary freeze drying, infiltration, cross-linking, secondary freeze drying, crushing and screening, and sterilization; dissolution is: preparing a 1.7-2.3wt% sodium alginate aqueous solution, adding a freeze-drying protective agent, stirring at 55-65°C, and cooling to 0-5°C; infiltration is: infiltrating the sodium alginate sponge obtained by primary freeze drying in a sodium alginate aqueous solution with a mass concentration of 0.1-0.8wt% to reach saturation, and obtaining a sodium alginate infiltrate; cross-linking is: immersing the sodium alginate infiltrate in a cross-linking liquid for cross-linking reaction. Using the technical solution provided by the present application, sodium alginate embolic particles with high porosity, uniform particle size, small average pore size, suitable water absorption, excellent suspension performance, and excellent catheter passing performance can be obtained.

The present application discloses a reflective film, a reflective sheet and a backlight module. The reflective film includes the following structures stacked in sequence: a base film; a first coating, the raw materials of the first coating include by mass: 50 parts of epoxy resin; 20-50 parts of nanocellulose; 0.5-3 parts of filler; a metal oxide layer, the metal oxide layer includes one or more of aluminum oxide and titanium oxide; a metal layer, including particles containing metal elements, the metal layer is not doped, wherein the particles containing metal elements include one or more of aluminum particles, silver particles, and gold particles, wherein the thickness of the metal layer is 60nm-120nm, and the metal oxide layer is 380 nm-540nm. The reflective film of the present application can solve the problems of poor thermal stability and poor service life of the reflective film on the basis of having good reflective performance.

This invention belongs to the field of building materials technology, specifically relating to a silica-alumina material, its preparation method, and its application. The silica-alumina material comprises 10-65 parts by weight of red mud, 20-60 parts by weight of slag powder, 0-20 parts by weight of silicate cement clinker, 0.1-8 parts by weight of an activator, and 5-15 parts by weight of an expanding agent; wherein, based on the mass of the expanding agent, the expanding agent comprises 0-60 wt% aluminum sulfate, 0-70 wt% carbide slag, 0-70 wt% tricalcium aluminate, 0-60 wt% calcium sulfoaluminate, and 0-60 wt% gypsum, and the content of at least two components in the expanding agent is not zero. The silica-alumina material of this invention, with its specific components and contents, can achieve both high strength and low shrinkage. When used in cement mortar, it can enhance the density of the cement and prevent cracking, enabling the material to be used for a long time.

The utility model discloses an elastic power-assisted fingerstall for assisting typewriting. The elastic power-assisted fingerstall comprises a near knuckle sleeve and a wrist sleeve, wherein the near knuckle sleeve is sleeved on a near knuckle of an index finger, and the wrist sleeve is sleeved on a wrist; the near knuckle sleeve is connected with the wrist sleeve through an elastic strip, and the elastic strip is distributed along the back of the index finger and the back of the palm; and the elastic strip is provided with a tension degree adjusting mechanism. After the elastic assisting fingerstall is worn, the tension degree of the elastic strip is adjusted through the tension degree adjusting mechanism, so that the elastic strip is in an elastic stretching state in a ready typing state. When the keyboard or the mouse is knocked and the index finger is lifted, the elastic strip elastically contracts along the finger back to provide backward and upward pulling assisting force; the working mode that the index finger completely depends on active contraction is changed into the working mode that active contraction and passive contraction are mixed, the index finger extensor contraction strength is reduced through assistance, the tension degree of the index finger extensor and auxiliary muscle groups of the index finger extensor is effectively relieved, and therefore the morbidity probability of chronic strain is reduced.

The utility model discloses a bushing outer pipe machining device, and relates to the technical field of bushing outer pipe machining, the bushing outer pipe machining device comprises a punching machine body, a workbench located on the punching machine body, a sliding block arranged below the punching machine body, and a first fixing base, a second fixing base and a third fixing base which are arranged above the workbench and used for containing to-be-machined pipe fittings; fixing columns attached to the inner side wall of a to-be-machined pipe fitting are arranged above the three fixing bases, a first punching base, a second punching base and a third punching base which correspond to the first fixing base, the second fixing base and the third fixing base respectively are arranged below the sliding block, a forming groove is formed below the first punching base, and a flattening punch is arranged below the second punching base. A cutting punch is arranged below the third punching base. The first stamping seat is used for stamping and necking a pipe fitting, the second stamping seat is used for flattening the necking, then the pipe fitting is placed on the third fixing seat, the cutting punch is used for blanking the necking, the sliding block drives the three stamping seats to press downwards, machining of different working procedures of the lining outer pipe can be completed, and the machining efficiency of the lining outer pipe is improved.

The utility model discloses a kind of pinhole plate and template machine, pinhole plate includes pinhole plate body, first boss, first through hole and pad high block, pinhole plate body is used to connect with the needle plate of template machine;First boss is protruded to the side of first plate body away from needle plate along first direction, first boss is used to support cloth located in the side of first boss away from pinhole plate body;First through hole is through pinhole plate body and first boss along first direction, first through hole is used to be provided with the needle of template machine, to carry out sewing to the sewing position to be located in first through hole in cloth;Pad high block is protruded to the side of first boss away from pinhole plate body along first direction, pad high block is used to support cloth after needle sewing, and move to the side of pad high block away from first boss;Wherein, when a previous sewing position to be moved to the side of pad high block away from first boss after needle sewing, a subsequent sewing position is moved into first through hole;The flatness of cloth is improved.

The invention discloses a high-temperature-resistant high-strength mullite aerogel composite material and a preparation method thereof. The mullite aerogel composite material comprises a silicon-aluminum molecular sieve skeleton structure and a mullite particle three-dimensional network combined with the silicon-aluminum molecular sieve skeleton structure, the framework structure of the silicon-aluminum molecular sieve is a framework structure formed by penetrating and lapping a silicon dioxide molecular sieve or a framework structure formed by penetrating and lapping a molecular sieve formed by silicon dioxide and aluminum oxide. The preparation method comprises the following steps: preparing silica-alumina sol and a silica-alumina molecular sieve solution, uniformly mixing the silica-alumina sol and the silica-alumina molecular sieve solution to obtain silica-alumina composite sol, then adding a coagulant for gelling and aging treatment to obtain silica-alumina composite gel, and then carrying out alcohol replacement and supercritical drying treatment to obtain silica-alumina composite aerogel; and calcining the silicon-aluminum composite aerogel to obtain the mullite aerogel composite material. The temperature resistance of the oxide aerogel in the air is improved to 1400 DEG C, and the oxide aerogel has great application prospects in the fields of high-temperature heat insulation, industrial high-temperature catalysis or adsorption and the like.

The utility model belongs to the technical field of batteries, and particularly relates to a square-shell battery cell heat management structure which comprises a shell, a plurality of groups of batteries are arranged in the middle of the shell; a plurality of groups of heat dissipation strips are arranged in the middle of the shell; the middle part of the battery is fixedly connected with a connecting column; the connecting column is in sliding connection with the shell; the middle part of the connecting column is fixedly connected with a plurality of groups of limiting bolts; a first spring is fixedly connected to the middle part of the limiting bolt; the middle part of the limiting bolt is in sliding connection with a wafer; a pull rope is slidably connected to the middle part of the round sheet; according to the step, when the battery needs to be mounted, the battery can be fixed in the shell through the fixing effect of the limiting bolts on the battery, and when the battery needs to be dismounted, the multiple sets of limiting bolts can be pressed, so that the battery can be quickly taken out from the interior of the shell, and the convenience in mounting and dismounting of the battery can be improved; and thus, the working efficiency during battery maintenance can be improved.

The invention discloses a lightweight low-thermal-conductivity blocky mullite aerogel material and a preparation method thereof. The light low-heat-conduction blocky mullite aerogel material comprises a carbon sacrificial SiOC network and a nanometer seed crystal and mullite particle three-dimensional network. The preparation method comprises the following steps: preparing silicon-aluminum composite sol; preparing a Si-O-C precursor sol; uniformly mixing the silicon-aluminum composite sol with the Si-O-C precursor sol to obtain a silicon-aluminum modified composite sol; adding a coagulant into the silicon-aluminum modified composite sol for gelling and aging to obtain SiOC / silicon-aluminum composite gel; carrying out alcohol replacement and supercritical drying treatment on the SiOC / silicon-aluminum composite gel to obtain silicon-aluminum modified composite aerogel; and carrying out heat treatment on the silicon-aluminum modified composite aerogel to obtain the blocky mullite aerogel material. The light low-heat-conduction blocky mullite aerogel material has great application prospects in the fields of high-temperature heat insulation, industrial high-temperature catalysis or adsorption and the like.

The invention discloses a battery positive electrode active material and a preparation method thereof, a positive plate and a lithium ion battery, the lithium ion battery positive electrode active material contains a modified NCM ternary material, and the modified NCM ternary material is obtained by co-modifying the NCM ternary material by a Ta-containing material, an F-containing material and a conductive polymer. When the modified NCM ternary material is adopted in a lithium ion battery positive electrode active material, the stability of the positive electrode material can be improved, and the first charge-discharge efficiency and the cycle performance of the battery are remarkably improved.

The utility model provides a heat exchange device and a refrigerator, the heat exchange device comprises a heat exchange pipe and heat dissipation fins, the heat exchange pipe is arranged on the heat dissipation fins in a penetrating mode, the heat exchange effect of the heat exchange device is further improved in the mode that the heat exchange area is increased through the heat exchange fins, and meanwhile at least one groove is formed in the inner surface of the heat exchange pipe. In the embodiment, at least one groove is formed in the inner surface of each heat exchange tube, so that when the heat exchange tubes and the radiating fins expand with heat and contract with cold under the action of an ultralow-temperature refrigerant, the grooves in the inner surfaces of the heat exchange tubes can play a role in inhibiting shrinkage of the heat exchange tubes; therefore, the shrinkage amplitude of the heat exchange tube under the action of the ultralow-temperature refrigerant is further reduced, the situation that a connecting structure between the heat exchange tube and the radiating fins is loosened is avoided, the overall heat exchange efficiency of the heat exchange device is further guaranteed, the working time of a refrigerating system is further shortened, and the purpose of energy conservation of products is achieved.

The utility model belongs to the technical field of wire rolling, and particularly relates to a wire rolling device for processing a steel wire thread insert, which comprises a processing table, a plurality of fixing rods are fixedly connected to the top of the machining table; the top of the fixing rod is fixedly connected with a fixing block; a through groove is formed in the middle of the fixed block; a pair of first grooves is formed in the middle of the fixing block; the middle parts of the pair of first grooves are connected with sliding plates in a sliding manner; rubber blocks are fixedly connected to the end parts of the pair of sliding plates; springs are mounted in the middles of the pair of sliding plates; the middle of the first groove is slidably connected with a clamping rod. The ends, close to each other, of the clamping rods and the sliding plates are inclined planes. The other end of the clamping rod is located in the through groove. A liquid storage tank is formed in the top of the processing table; a baffle frame is fixedly connected to the top of the machining table. The side wall of the liquid storage tank is fixedly connected with a water pump; by means of the structure, damage to surrounding objects when the steel wire is broken and flies can be reduced.

The utility model provides a novel structure capable of improving bending of memory particles. The novel structure comprises a chip layer, a substrate layer and a solder ball layer which are sequentially arranged from top to bottom, the substrate layer comprises a chip pasting end, a substrate main body end and a solder ball pasting end which are sequentially arranged from top to bottom; cCL laminated boards and glass fibers are arranged in the base board main body end, the glass fibers are arranged in the CCL laminated boards in a wave-shaped embedded mode, and the thickness of each single-layer CCL laminated board is 43 micrometers. On the basis of a chip layer, a substrate layer and a solder ball layer structure of a conventional memory, the substrate main body adopts a composite structure of the CCL laminated board and the glass fibers, and the thickness of the CCL laminated board reaches 43 microns, so that the effect of improving the overall rigidity of the substrate can be achieved, the shrinkage degree of the substrate is reduced, the bending of the substrate is effectively controlled, and the service life of the substrate is prolonged. And the mass production level and the product evaluation result are met, and the target of on-time mass production is achieved.

The invention discloses a photo-thermal dual-curing resin composition as well as a preparation method and application thereof, and the photo-thermal dual-curing resin composition comprises the following components in parts by mass: 50-80 parts of bisphenol A epoxy resin, 5-8 parts of dicyclopentadiene epoxy resin, 50-110 parts of a photosensitive compound, 20-100 parts of a curing agent and 0.5-5 parts of a curing accelerator, 1-5 parts of a photoinitiator, 0.5-3.5 parts of a stabilizer, 0.1-1 part of a polymerization inhibitor, 0.5-7 parts of a silane coupling agent and 1-10 parts of a filler; the ratio of the total mass of the epoxy resin to the mass of the photosensitive compound is (0.6-1.32): 1; the structure of the curing agent is as follows: # imgabs0 #, wherein R1 and R2 are respectively C2-C18 alkylene groups. The resin composition provided by the invention can realize low-temperature illumination pre-curing so as to achieve the purpose of rapid positioning, meanwhile, an adhesive layer can have high bonding strength through further thermosetting, so that the application requirements of rapid positioning and high bonding strength are met, and the formed adhesive layer has good humidity and heat resistance and high storage modulus, and is suitable for being used in the field of electronic devices. And the reliability of the product can be effectively improved.

The invention belongs to the technical field of fruit and vegetable drying, and particularly relates to an apple slice drying method based on a plasma technology. The drying method comprises the following steps: performing plasma pretreatment on fresh apple slices to obtain pretreated apple slices; the time of the plasma pretreatment is 20 to 180 seconds; and performing hot air drying on the pretreated apple slices to obtain dried apple slices. According to the method, the fresh apple slices are firstly subjected to plasma pretreatment and then are dried, the etching effect of plasma can promote internal moisture of the apple slices to migrate to the surfaces, moisture evaporation is accelerated, and the drying time of the apple slices is shortened. According to the method, the drying efficiency of the apple slices can be remarkably improved, the energy consumption is reduced, the color, the shape, the rehydration capacity and the sensory quality of the dried apple slices are improved, the technical problems that in the prior art, the drying efficiency of the apple slices is low, and the product quality is reduced are solved, and a new technical approach is provided for high-value processing and utilization of the apple slices.

The invention relates to the technical field of environment-friendly washing machines, and provides an ozone generating device for an environment-friendly washing machine and the environment-friendly washing machine. The ozone generating device for the environment-friendly washing machine is applied to the washing machine and comprises an oxygen bottle, a pressure reducing valve, a flow meter, an ozone generator, an ozone concentration monitor, a control system, a water inlet mechanism and a dewatering mechanism; the input end of the pressure reducing valve is communicated with the output end of the oxygen bottle, the input end of the flow meter is communicated with the output end of the pressure reducing valve, the input end of the ozone generator is communicated with the output end of the flow meter, and the input end of the ozone concentration monitor is communicated with the output end of the ozone generator. The problems that in the prior art, clothes washing depends on detergents and disinfectants, a large amount of sewage is generated during daily clothes washing, environmental pollution and sewage treatment energy consumption waste are caused, the phosphorus content of the detergents is high, water eutrophication is caused, human skin, especially infant underwear and female underwear are harmed, and diseases are possibly caused are solved.

The utility model relates to the technical field of air conditioners, in particular to an indoor unit and an air conditioning system, and aims to solve the problem that an existing indoor unit easily generates abnormal sound due to thermal expansion and cold contraction during startup and shutdown. In order to achieve the purpose, the indoor unit comprises a plurality of air conditioner parts which are connected with one another, and the air conditioner parts are provided with matching surfaces so as to be matched with other air conditioner parts; and in two adjacent matching surfaces, one matching surface is provided with a first micro bulge, and the other matching surface is provided with a second micro bulge. The first micro-protrusions and the second micro-protrusions can absorb a part of vibration energy in the vibration process, the vibration amplitude is reduced, the first micro-protrusions and the second micro-protrusions can transversely expand and contract in the thermal expansion and cold contraction process, the expansion amount and the contraction amount towards the air conditioner components are reduced, the displacement amount between the adjacent air conditioner components is reduced, and the air conditioner components are prevented from being damaged. And noise caused by thermal expansion and cold contraction is reduced. And the stress concentration phenomenon of the geometric edge area can be reduced, the sound of thermal expansion and cold contraction is reduced, and the user experience is improved.

An injection molding insulation structure of a motor stator groove comprises an iron core, a plurality of stator grooves are arranged in the iron core at intervals along the circumferential direction, any stator groove is internally provided with an injection molding insulation part, and the radial cross section of the injection molding insulation part is U-shaped. At least two protruding strips are symmetrically arranged on the inner walls of the two sides of the injection molding insulating part at equal intervals, a plurality of copper wires arranged in the radial direction are arranged in any stator groove and the injection molding insulating part in a penetrating mode, and the protruding strips are located in edge gaps between the adjacent copper wires to separate and fix the copper wires. The heat conductivity coefficient of the injection molding insulating part is better than that of fiber paper, and an insulating system using the injection molding insulating part is good in heat conduction performance, heat dissipation performance and cooling performance. The copper wires are separated and fixed through the protruding strips, all the copper wires are evenly arranged, and the copper wires are prevented from being collided and rubbed with one another in the working process. The end part of the injection molding insulating part is provided with a flange which extends out of the end surface of the iron core, so that the creepage distance of a copper wire at the end part is increased.

The invention discloses a silver-containing composite slurry, a preparation method thereof and an electronic interconnection material. The silver-containing composite slurry comprises, by weight, 60 to 95 parts of metallic silver, 1 to 10 parts of auxiliary agents and 1 to 15 parts of organic microspheres; the metallic silver comprises micron silver particles and nano silver particles, and the organic microspheres are composed of at least one of organic silica gel, polyamide resin, polyester, polyphenylene ether, polyparaphenylene terephthalamide, polyimide resin, polyphenylene sulfide resin and polybutylene terephthalate. The auxiliary agent in the silver-containing composite slurry not only avoids the drastic shrinkage of metallic silver during sintering by adding a certain volume of organic microspheres, but also has a smaller modulus than silver, which reduces the modulus of the composite material as a whole after sintering, thereby reducing the stress caused by the mismatch of thermal expansion coefficients, and can improve the stress problem caused by the inconsistency of thermal expansion coefficients between the electronic interconnection material containing the silver-containing composite slurry and the substrate.

The present invention provides a cement adhesive and its preparation method and application, belonging to the technical field of cement adhesive. The cement adhesive provided by the present invention comprises the following components: aluminate cement, artificial porcelain sand, titanium oxide, silica powder, admixture and water; the water-cement ratio of the cement adhesive is 0.1-0.2; the admixture comprises an air entraining agent, a water reducer, an antifreeze agent, a reinforcing agent and a steep wave performance improver; the water reducer is a high-efficiency polycarboxylate water reducer; the mass of the reinforcing agent is 0.1-0.3% of the total mass of aluminate cement, artificial porcelain sand, titanium oxide and silica powder. The air entraining agent of the present invention can form bubbles in cold areas to absorb frost heave stress and reduce the degree of damage to the cement adhesive; the bubbles can also reduce the formation of pores and cracks; during the drying process, the bubbles can also absorb part of the stress when the cement adhesive shrinks, thereby improving the cold resistance; by limiting the water-cement ratio, the amount of water can be controlled to reduce the cold resistance.

The utility model relates to the field of puncture outfits, in particular to a sleeve type puncture outfit for a laparoscope, and solves the technical problems that the size of an operation channel is inconvenient to adjust due to an integrated structure of an existing puncture outfit and a sheathing canal, the whole puncture outfit needs to be discarded after being polluted, and the use cost of a single puncture outfit is high. According to the technical scheme, the sleeve type puncture outfit for the laparoscope comprises a puncture outfit shell main body, a puncture needle, a grip, a sheathing canal, a sleeve, an outer edge plate, a pressing ring, an alignment mechanism, a quick assembly assembly and an auxiliary heating assembly; the sleeve structure is used as a connecting piece between the puncture outfit shell body and the sheathing canal, sheathing canals and puncture needles of different specifications can be independently replaced within the channel size range of the puncture outfit shell body so as to form operation channels of different sizes, and proper operation instruments can be conveniently provided to enter and exit. And compared with the prior art that the whole puncture outfit is polluted and discarded, the use cost of the puncture outfit is reduced.

The present invention discloses a lithium-ion battery diaphragm slurry and a preparation method thereof, and a lithium-ion battery composite diaphragm, wherein the lithium-ion battery composite diaphragm comprises a composite adsorbent material powder, a dispersant, deionized water, a binder and a surfactant, and the weight ratio of the composite adsorbent material powder, the dispersant, the deionized water, the binder and the surfactant is 1: 0.001-0.005: 2.9-6.8: 0.1-0.4: 0.004-0.007; wherein the composite adsorbent material powder comprises a non-metallic mineral, an acrylamide monomer, an initiator and deionized water, and the mass ratio of the non-metallic mineral, the acrylamide monomer, the initiator and the deionized water is 1: 0.15-0.45: 0.01-0.05: 10-50. The present application adopts a polyacrylamide / non-metallic mineral composite material as a functional coating of a lithium-ion battery composite diaphragm, and the prepared composite coated diaphragm can effectively capture heavy metal ions dissolved from the battery, reduce the precipitation of metal ions at the negative electrode to damage the SEI film or puncture the diaphragm, and improve the battery cycle performance and safety performance.

The utility model relates to the technical field of air conditioners, in particular to an indoor unit and an air conditioning system, and aims to solve the problem that an existing indoor unit easily generates abnormal sound due to thermal expansion and cold contraction during startup and shutdown. In order to achieve the purpose, the indoor unit comprises a plurality of air conditioner parts which are connected with one another, and the air conditioner parts are provided with matching surfaces so as to be matched with other air conditioner parts; one of two adjacent matching surfaces is provided with a first micro bulge, and the other one is provided with a second micro bulge; the first micro bulges comprise a plurality of convex strips and / or a plurality of convex points which are sequentially arranged on the matching surface; the second micro-protrusions comprise a plurality of protruding points arranged on the matching face. In the thermal expansion and cold contraction process, the first micro protrusions and the second micro protrusions can transversely expand and contract, the expansion amount and the contraction amount of the air conditioner components are reduced, the displacement amount between the adjacent air conditioner components is reduced, and noise caused by thermal expansion and cold contraction is reduced; and the stress concentration phenomenon of a geometric edge area can be reduced, and contact slippage between air conditioner components is improved.