31results about How to "Increase flow space" patented technology

The invention relates to the technical field of glycerol triacetate preparation, in particular to an esterification phase splitter for preparing glycerol triacetate, which comprises a tower tray arranged in a rectifying tower, umbrella-shaped covers are uniformly distributed on the upper surface of the tower tray, and the tower tray comprises a movable tray, a fixed tray, a riser and an adjusting mechanism. By optimizing the structure of the umbrella-shaped cover and the design of the adjusting mechanism, the problems of a viscous layer and entrainment caused by high viscosity of glycerol triacetate are solved, by reducing the diameter of the bottom of the umbrella-shaped cover and reducing the comprehensive height of the overflow weir, the liquid flowing space is enlarged, the liquid retention time is shortened, and by forming an air inlet groove and an adjusting hydraulic oil cylinder, the liquid retention time is shortened. The gas-phase flow area is increased, gas-liquid contact is optimized, entrainment is reduced, through adjustment of the hydraulic oil cylinder, adaptation to the requirements of different reaction stages is achieved, the height of the downcomer is increased, and the flooding risk is reduced.

The invention discloses a stacked packaging structure and a forming method thereof, and the forming method comprises the steps: enabling a first active surface of a first chip to face downwards, and enabling the first active surface to be mounted on the upper surface of a substrate; a chip stacking structure is formed on the first back face of the first chip and comprises a plurality of second chips sequentially stacked in the vertical direction, each second chip comprises a second active face and a second back face which are opposite, the second active face is provided with micro protrusions, and the second back face is provided with second connecting terminals; at least one first diversion trench extending from one end of each second chip to the other end of the second chip is arranged in the passivation layer between the micro-bulges, and the second active surface of each second chip faces downwards; the micro-bulges on the second active surface of the second chip on the upper layer in the chip stacking structure are welded together with the second connecting terminals on the second back surface of the second chip on the adjacent lower layer; and forming the plastic package layer filled between the upper and lower second chips, thereby facilitating the flowing of the plastic package layer material when the plastic package layer is formed, and reducing the filling difficulty of the plastic package layer material.

The utility model discloses a road bridge deicing device which comprises a moving frame, the moving frame is connected to external moving equipment, an adjusting mechanism is arranged on the moving frame, and the adjusting mechanism comprises a fixing pipe, an external connecting pipe, a corrugated pipe, an air blowing mechanism, a fixing ring, an elastic piece, a flow deflector, a telescopic disc, a bidirectional lead screw and a rotating mechanism. The air blowing mechanism is connected to the fixed pipe and the movable frame in a matched mode, the external pipe is connected to an external air inlet mechanism, the corrugated pipe is connected to the external pipe and the fixed pipe, the multiple elastic pieces are arranged, when the telescopic discs get close, the elastic pieces get close to each other, the flowing resistance is increased, and therefore the flowing speed of hot air is reduced, and the air blowing effect is improved. According to the design, by adjusting the distance between the elastic pieces, the flow speed of hot air can be adjusted, and the adaptability and practicability of the deicing device are improved.

The utility model provides a valve element assembly, a one-way valve and an air conditioner, and the valve element assembly comprises a valve port piece and a valve element, the connecting sleeve is connected with the valve port piece, the valve port is located in the connecting sleeve, and an overflowing hole communicated with the interior of the connecting sleeve is formed in the connecting sleeve; the limiting sleeve is connected to the connecting sleeve, and the minimum outer diameter of the connecting sleeve is larger than the outer diameter of the limiting sleeve; the valve element is movably arranged in the limiting sleeve; the valve core is configured to move between a valve opening position and a valve closing position relative to the limiting sleeve; at the valve closing position, the first end of the valve element abuts against the side wall of the valve port to block the valve port, and the second end of the valve element is located in the limiting sleeve; at the valve opening position, the first end of the valve element is separated from the side wall of the valve port, and the valve port communicates with the overflowing hole. According to the valve element assembly, the connecting sleeve is arranged, the limiting sleeve is connected with the valve port piece through the connecting sleeve, the overflowing hole is formed in the connecting sleeve, and therefore the limiting sleeve cannot be affected in the process of forming the overflowing hole, and deformation of the limiting sleeve is effectively prevented.

The utility model discloses a box-type lithium battery heat dissipation device, which relates to the technical field of lithium battery heat dissipation and comprises a box-type battery heat dissipation device body, the box-type battery heat dissipation device body comprises a heat dissipation protective sleeve shell, and a heat source accumulated in the heat dissipation protective sleeve shell is drained to form the heat dissipation protective sleeve shell. The outer side surface of the top of the heat dissipation protection sleeve shell is movably sleeved with a protection sleeve shell mechanism, and a butt joint limiting unit is arranged on the inner side surface of the heat dissipation protection sleeve shell. According to the utility model, the battery is mounted in the battery heat dissipation sleeve shell in a differentiated manner, the battery heat dissipation sleeve shell is clamped on the outer side surface of the limiting clamping plate, and meanwhile, the limiting clamping plate is moved into the heat dissipation protective sleeve shell to be matched with the limiting upright post on the inner side surface of the sunken groove to clamp and limit the position of the limiting clamping plate; and a limiting clamping plate is moved into the heat dissipation protection sleeve shell and is matched with an elastic buffer wire to elastically contact with the surface of the bottom end of the battery heat dissipation sleeve shell.

The invention discloses a punching detection device for processing a locking rotator. The invention relates to the technical field of rotator processing, comprising a tube, a high-pressure air pump is arranged on the top of the air tube; a conical nozzle, the conical nozzle is used to increase the gas flow speed by reducing the gas flow space, and the outer surface of the air tube is provided with inclined air holes. The punching detection device for processing a locking rotator has a conical nozzle arranged at the bottom of the air tube to increase the gas flow speed by reducing the gas flow space, thereby blowing away iron filings and dust, preventing the accumulation of too much iron filings and dust remaining from processing in the punching hole of the locking rotator, which will affect the subsequent detection of the punching depth and produce a certain error. By opening the upwardly inclined oblique air holes on the surface of the air tube, the iron filings and dust blown up by the conical nozzle fly upward out of the deep hole, preventing the accumulated iron filings and dust blown up in the deep hole from being difficult to be quickly discharged from the deep hole with a small remaining space when there is a lot of them.

The utility model belongs to the technical field of photovoltaic grid-connected cabinets, in particular to a photovoltaic grid-connected cabinet with a high-temperature early warning function, which comprises a photovoltaic grid-connected cabinet body, a mounting plate is fixedly connected inside the photovoltaic grid-connected cabinet body, a plurality of mounting frames are fixedly connected between the mounting plate and one side of the photovoltaic grid-connected cabinet body, and the mounting frames are fixedly connected with the photovoltaic grid-connected cabinet body. An expansion air bag is fixedly connected to the interior of the mounting frame, and a [-shaped supporting frame is fixedly connected to the outer side of the expansion air bag; on one hand, a high-temperature early warning prompt can be sent to an external worker through cooperation of an opening and closing plate and an alarm button, and on the other hand, through cooperation with a connecting plate, when the internal environment of the photovoltaic grid-connected cabinet body is in a high-temperature state, the flowing space for gas exchange between the interior and the exterior of the whole photovoltaic grid-connected cabinet body is increased, and the working efficiency of the photovoltaic grid-connected cabinet body is improved. Autonomous heat dissipation of the photovoltaic grid-connected cabinet body in an internal high-temperature environment is facilitated, and internal elements in the photovoltaic grid-connected cabinet body are prevented from being in the high-temperature environment for a long time.

This utility model discloses a full-color LED large-screen display device, relating to the field of LED large screens. It includes an outer frame, with a display screen mounted on the front side of the frame. A mesh is installed at the bottom of the through-space of the outer frame, and a motor is installed above the mesh. A fan is connected to the output end of the motor. Air ducts are symmetrically arranged inside the outer frame, with air holes evenly spaced on both sides of the ducts. Heat-absorbing blocks are evenly spaced through the left and right sides of the outer frame, with through holes in the center of each block. Heat dissipation fins for auxiliary heat dissipation are evenly spaced on the back of the outer frame. During use, this full-color LED large-screen display device can evenly deliver air into the interior space of the large screen, and the internal heat is carried out to the outside through even airflow. Simultaneously, the heat-absorbing and guiding elements on the sides and the heat-absorbing and heat-dissipating components on the back can accelerate heat dissipation, thereby improving heat dissipation efficiency, extending the lifespan of the large screen, and preventing heat damage.

The present invention provides a flexible circuit substrate, comprising a flexible film and a patterned circuit layer. The flexible film has a chip bonding area. The patterned circuit layer is arranged on the flexible film. The patterned circuit layer comprises a plurality of pins and at least one circuit located in the chip bonding area, the at least one circuit having at least one bend, wherein at least one circuit comprises a plurality of grooves and concave grooves, the plurality of grooves and concave grooves are at least located at at least one bend, and the concave grooves connect the plurality of grooves. A film-on-chip packaging structure comprising the above-mentioned flexible circuit substrate is also provided.

The utility model discloses a coating die head capable of detecting and adjusting the pressure of a coating cavity in a partitioned manner. The coating die head comprises an upper die head and a lower die head, the lower die head is arranged below the upper die head, and a coating cavity and a slurry supply pipe communicated with the coating cavity are arranged in the lower die head; a plurality of slurry discharging ports are formed in the coating gasket, the coating gasket is arranged between the upper die head and the lower die head, the upper die head, the coating gasket and the lower die head define a slurry coating runner, the coating cavity is communicated with the discharging ports, the discharging ports are communicated with the coating runner, and a coating port is formed in the end of the coating runner; the pressure adjusting block is formed by splicing a plurality of sub pressure adjusting blocks with the same or different sizes, the pressure adjusting block is arranged below the coating gasket and corresponds to the position of the discharge port in the coating gasket, and the pressure adjusting block is located in the coating cavity; and the plurality of cavity pressure sensors are arranged on the upper die head and / or the lower die head and are used for respectively detecting the pressure corresponding to each discharge hole in the coating cavity.

The utility model relates to the technical field of heat transfer devices, and particularly discloses a vapor chamber which comprises an upper shell plate, at least one layer of liquid absorption core and a lower shell plate which are sequentially arranged from top to bottom, a vacuum cavity is formed between the upper shell plate and the lower shell plate, a plurality of through grooves which vertically penetrate through the liquid absorption core are formed in the liquid absorption core, and a plurality of through holes are formed in the lower shell plate. And the through groove forms a flow channel for steam in the vacuum chamber of the vapor chamber to flow. The liquid absorbing core is provided with the plurality of through grooves which vertically penetrate through the liquid absorbing core, and the through grooves are vertically connected with the steam cavity, so that not only is the steam flowing space improved, but also the fluid state can be changed in the bubble forming process, heat can be quickly taken away from a heat source under long-time operation, and the phenomenon of heat concentration is reduced.

The present invention relates to the technical field of air coolers, and specifically to a vehicle carbon dioxide air cooler and a preparation method thereof, comprising a plurality of flat tubes, and also comprising a collecting groove opened at one end of a collecting tube, and right-angle plates are installed on the symmetrical outer walls of the collecting tube on both sides; an air avoidance groove is equidistantly arranged at the edge of the groove of the collecting groove, and the air avoidance groove is in the shape of a triangular pyramid; a plurality of mounting holes are equidistantly arranged on the cover plate, and after the cover plate is installed on the collecting tube, the mounting holes correspond to the air avoidance grooves one by one. In this scheme, a plurality of air avoidance grooves are opened on the side of the collecting groove, and a conical space is left at the bottom of the air avoidance groove after welding is completed, which can expand the flow space of the gas in the later stage. During the welding process, a guide block is set at the bottom of the air avoidance groove, and an inclined surface for airflow guidance is set on the guide block, so that the airflow can be directed toward the outlet pipe when entering the collecting tube from the flat tube, thereby reducing the turbulence of the internal airflow and further improving the stability of the internal air pressure.

The utility model belongs to the technical field of solar water heaters, and particularly relates to a solar vacuum tube and a solar water heater. The solar vacuum tube comprises a vacuum tube body and a flow guide part, the flow guide part is arranged in the vacuum tube body, and a flowing channel is formed between the flow guide part and the inner wall of the vacuum tube body and used for fluid flowing. According to the solar vacuum tube provided by the invention, the flowing space of the fluid in the vacuum tube body is optimized, the circulating speed of the fluid in the vacuum tube body is increased, heat loss is reduced, and the heat gain of the solar vacuum tube is higher.

The invention discloses a double-fuel-tank device for a loading machine and a fuel supply and instrument panel control method. The double-fuel-tank device comprises a main fuel tank, an auxiliary fuel tank, a first communicating pipeline and a second communicating pipeline. The main oil tank and the auxiliary oil tank are communicated through a first communicating pipeline and a second communicating pipeline, the first communicating pipeline is located on the upper middle portions of the two oil tanks, the second communicating pipeline is located on the lower portions of the two oil tanks, and an oil conveying filter and a fuel oil conveying pump are sequentially arranged on the second communicating pipeline in a spaced mode in the direction from the auxiliary oil tank to the main oil tank. The oil conveying filter and the fuel oil conveying pump are both electrically connected with a controller of the whole vehicle. The main oil tank and the auxiliary oil tank are arranged at the same time, so that the total amount of fuel oil is effectively increased, the cruising ability of the loader is remarkably enhanced, and the working efficiency of the loader is improved. And by arranging the first communicating pipeline, natural heat dissipation of the fuel oil is achieved. And by arranging the second communicating pipeline, the fuel oil in the auxiliary oil tank is supplemented to the main oil tank, the fuel oil is filtered, and the quality of the fuel oil is guaranteed.

The utility model belongs to vehicle technical field discloses a kind of liquid cooling heat dissipation substrate and power module for power module.The liquid cooling heat dissipation substrate for power module includes bearing plate body, fence structure and flow channel structure, fence structure is set out heat dissipation area on the side of bearing plate body away from power module, flow channel structure includes shunt main stem and shunt branch, multiple shunt main stem is arrayed distribution in heat dissipation area along first direction, to divide multiple flow channels in heat dissipation area, the two sides of each shunt main stem along first direction are each equipped with multiple shunt branch of staggered arrangement, one end of each shunt branch is equipped with first spoiler projection.Not only expand contact area, but also effectively widen the flow space of coolant, to reduce flow resistance, improve flow speed, simultaneously, by setting first spoiler projection, cooling liquid can be caused to produce vortex and secondary flow, to this disturbance and destroy close to flow channel wall surface laminar boundary layer, improve heat dissipation efficiency.

The large-flow type cartridge valve unit comprises a valve body assembly and a valve sleeve assembly, the valve body assembly comprises a valve body and a valve cover, the valve body is detachably connected with the valve cover, the valve body is provided with an inserting groove and a working oil port, and the inserting groove is communicated with the working oil port; the valve sleeve assembly comprises an inserting portion and a valve element, the valve element is movably arranged in the inserting portion, the inserting portion is embedded in the inserting groove, one end of the inserting portion extends out of the inserting groove to abut against the valve deck, and the two opposite ends of the inserting portion are in limiting fit with the valve deck and the inserting groove respectively.

The utility model relates to a refrigerator. The refrigerator comprises a refrigerator body and a refrigerator cover, a refrigerator liner; an evaporation bin is formed between the air duct assembly and the inner wall of the refrigerator container; a reserved air groove is formed in the inner wall in the refrigerator container in a concave mode and communicates with the evaporation bin. The evaporator is arranged opposite to the reserved air groove; the baffle is arranged at the communicating position of the reserved air groove and the evaporation bin; when the evaporator is not blocked by frost, the baffle can close the communicating position of the reserved air groove and the evaporation bin so that the reserved air groove can be isolated from the evaporation bin, the air flowing space in the evaporation bin can be reduced, the refrigeration effect of the refrigerator can be improved, energy can be saved, and the power consumption of the refrigerator can be reduced; when the evaporator is blocked by frost, the baffle can open the communication position of the reserved air groove and the evaporation bin, so that the reserved air groove is communicated with the evaporation bin, the air flowing space in the evaporation bin is increased, air in the evaporation bin can flow through the reserved air groove, smooth flowing of the air in the evaporation bin is guaranteed, and the good refrigeration effect of the refrigerator is maintained. Therefore, the frost blockage problem of the refrigerator is solved.

The present invention discloses a continuous wave mud pulse generator for oil drilling, and relates to the technical field of measurement while drilling tools for oil drilling. The continuous wave mud pulse generator for oil drilling provided by the present invention has a rotating tube fixedly connected to the middle of a rotor disk, spiral grooves are provided at both ends of the outer side of the rotating tube, and a climbing rod is fixedly connected to the bottom of the stator plug, and the climbing rod is slidably connected to the spiral slope of the spiral groove. During the rotation of the rotor disk, the climbing rod is lifted up by the spiral groove on the rotating tube, so that the stator plug rises away from the rotor disk during the interlacing of the flow holes on the rotor disk and the flow grooves on the stator plug, effectively increasing the flow space of the mud, thereby effectively increasing the fluctuation of the mud pressure pulse, and facilitating the collection of pulse data.

The compressor capable of improving the energy efficiency ratio comprises a compressor shell and a compressor body installed in the compressor shell, the compressor body is located on one side of the compressor shell, an oil storage cavity is formed in the other side of the compressor shell, the upper portion of the oil storage cavity is communicated with an exhaust pipe, and the exhaust pipe penetrates through the compressor shell upwards; the lower end of the piston extends into the oil storage chamber and is close to the exhaust end of the compressor body; a buffer oil baffle chamber is arranged at the part, positioned in the oil storage chamber, of the exhaust pipe; the lower end of the exhaust pipe is provided with a trumpet-shaped outer edge part, a flow guide oil baffle plate is arranged at one end, with a larger trumpet opening, of the outer edge part, the flow guide oil baffle plate is arranged over against the exhaust end of the compressor body, and the flow guide oil baffle plate and the exhaust end of the compressor body are respectively arranged on two opposite sides of the lower end of the exhaust pipe. The possibility of oil shortage of the compressor is reduced by reducing the refrigerant oil carried by the refrigerant, so that the operation efficiency of the compressor is improved to a certain extent, and the energy efficiency ratio of the compressor is further improved.

The invention discloses punching detection equipment for machining of a locking rotator, and relates to the technical field of rotator machining, the punching detection equipment comprises a pipe, and a high-pressure air pump is arranged at the top of the air pipe; according to the punching detection equipment for machining the locking rotator, the conical nozzle is arranged at the bottom of the air pipe, the air flowing speed is increased by reducing the air flowing space, and inclined air holes are formed in the outer surface of the air pipe, so that the air flowing speed is increased by reducing the air flowing space, and then scrap iron and dust are blown away; the situation that too many scrap iron and dust left after machining are accumulated in a punched hole of the locking rotating device, and consequently follow-up detection on the depth of the punched hole is affected, and a certain error is generated is prevented; an inclined air hole inclining upwards is formed in the surface of an air pipe, so that the surrounding scrap iron and dust blown by a conical nozzle fly upwards out of a deep hole; and the situation that much accumulated scrap iron and dust blown up in the deep hole are difficult to discharge from the deep hole with smaller residual space quickly is prevented.

The invention discloses a slurry coating device for a sintered foil for an aluminum electrolytic capacitor, and relates to the technical field of coating, and the slurry coating device comprises a composite mechanism. According to the slurry coating device for the sintered foil for the aluminum electrolytic capacitor, through the design of a composite mechanism, an aluminum foil roll is placed on the surface of the unwinding roll shaft, then one side of the aluminum foil roll is placed on the outer side of the winding roll shaft to be fixed, and the winding roll shaft is driven by the motor to rotate, so that the effect of automatically winding the aluminum foil is achieved; when the aluminum foil penetrates through the inner side of the limiting mechanism, the limiting mechanism restrains the movement space of the aluminum foil and keeps the constant-speed conveying function, meanwhile, the situation that the aluminum foil shakes in the winding process, and consequently the coating effect and the follow-up aluminum foil coating quality are affected is avoided, when the winding roll shaft rotates to wind materials, the aluminum foil is covered with a film through the coating mechanism, and the coating efficiency is improved. And after coating is finished, the slurry on the surface of the aluminum foil is dried through the processing mechanism, the drying speed of the slurry is increased, and therefore normal operation is kept.

The invention discloses a stacked packaging structure and a forming method thereof, and the forming method comprises the steps: enabling a first active surface of a first chip to face downwards, and enabling the first active surface to be mounted on the upper surface of a substrate; a chip stacking structure is formed on the first back face of the first chip and comprises a plurality of second chips sequentially stacked in the vertical direction, each second chip comprises a second active face and a second back face which are opposite, the second active face is provided with micro protrusions, and the second back face is provided with second connecting terminals; at least one flow guide channel extending from one end of the second chip to the other end of the second chip is arranged between the micro bulges, the second active surface of each second chip faces downwards, and the micro bulges on the second active surface of the second chip on the upper layer in the chip stacking structure are welded together with the second connecting terminals on the second back surface of the second chip on the adjacent lower layer; a plastic package layer filling the space between the upper and lower second chips is formed, and the flow guide channel is beneficial to the flowing of a plastic package layer material when the plastic package layer is formed, so that the filling difficulty of the plastic package layer material is reduced.

The invention provides a heat exchanger, a refrigeration mechanism and refrigeration equipment, the heat exchanger comprises a heat exchange tube single body and fins, the heat exchange tube single body comprises two first tube sections and a second tube section, the two ends of the second tube section are connected with the two first tube sections respectively, and the projections of the two first tube sections on a first plane are arranged at a first included angle; the fins are arranged on the outer wall of the first pipe section; the first plane is the plane where the second pipe section is located. The heat exchange efficiency of the heat exchanger can be improved, the quality of the heat exchanger is improved, the structure is simple, the process difficulty can be reduced, and the cost is reduced.

The utility model relates to the field of part connection, in particular to a plastic part clamping structure which comprises a buckle body of a front cover and a buckling position structure correspondingly matched with the buckle body and located on a rear cover extension plate, and a through hole is formed in the rear cover extension plate in a penetrating mode to form a buckling position part base body. The inner wall, close to the rear cover extension plate, of the buckling part base body extends and is provided with a flow rate expansion part penetrating through a through hole in a protruding mode, the upper surfaces of the buckling part base body and the flow rate expansion part extend and are provided with buckling guide parts in a protruding mode, the inner wall, close to the rear cover extension plate, of the buckling guide parts is an inclined guide plane, and the width of the flow rate expansion part is 1 / 2-1 of the width of the buckling part base body. The joint between the buckling position guide part and the buckling position part base body and the joint between the buckling position guide part and the flow velocity expansion part are chamfers, and the buckling position guide part, the buckling position part base body and the flow velocity expansion part are integrally formed to form a The structure can effectively prevent poor glue leakage at the buckle position in the production process of the plastic rear shell, avoids the dark crack defect, enhances the structural strength of the buckle position, and prolongs the service life of the product.

The utility model provides a transformer, a motor assembly and a vehicle. The transformer comprises a first machine shell, the first machine shell comprises a first bottom plate and a first side wall, the first side wall is arranged on the first bottom plate in a protruding mode, a first containing cavity is defined by the first bottom plate and the first side wall, and a first chamfering face and a first glue pouring opening are formed in the inner wall face, facing the first containing cavity, of the first side wall; the first chamfered surface is located at one end, far away from the first accommodating cavity, of the first side wall, the first chamfered surface is connected with the inner wall of the first glue pouring port, and the first glue pouring port is communicated with the first accommodating cavity; the first glue pouring opening is used for pouring glue so that the first magnetic core can be fixed in the first containing cavity, the width of the gap between the first side wall and the first magnetic core can be increased through the arrangement of the first chamfered face, the flowing space of the side, away from the first bottom plate, of the gap is increased, and the fluidity of the glue can be improved easily, and the first chamfered face is connected with the inner wall of the first glue pouring opening. Therefore, gas in the first glue filling port is easier to exhaust, glue filling is facilitated, and the assembling efficiency of the transformer is improved.

The utility model discloses a steam generating device and a household appliance, relates to the field of steam generating devices, and adopts the technical scheme that the steam generating device comprises a steam generator, a water tank and a connecting pipe, a main body part and at least one first part communicated with the main body part are arranged in the connecting pipe, and the first part protrudes relative to the main body part. A main body part and a first part protruding relative to the main body part are arranged in the connecting pipe, and in one specific structure, the first part protrudes on the upper side of the main body part in the relative height direction. The distance between the first part and the main body part is increased. When the liquid level in the steam generator is lowered to be lower than the relatively high first part in the connecting pipe, steam flows to the water tank from the relatively high first part in the form of bubbles. And water in the water tank can flow back to the steam generator from the lower main body part, so that the obstruction of countercurrent steam on water replenishing of the water tank is reduced.

The invention provides a bionic volute tongue and an air conditioner. The bionic volute tongue comprises a volute tongue backflow area and a volute tongue fillet which are connected in sequence, and a plurality of fins are arranged on the side, close to a cross-flow fan, of the bionic volute tongue; in the extending direction of the bionic volute tongue from the volute tongue backflow area to the volute tongue fillet, the surface area of any fin located at the volute tongue fillet is smaller than that of any fin located at the volute tongue backflow area; bionic structure improvement is carried out on the side, close to the cross-flow fan blade, of the volute tongue, bionic is carried out according to the feather distribution condition in biological field wings, the bionic volute tongue can fully disperse impact airflow at the volute tongue, the rotation fundamental frequency generated when the airflow impacts the volute tongue is effectively dispersed, superposition of same-frequency noise is prevented, and the noise reduction effect is achieved. Rotation noise of the air conditioner can be effectively reduced, and the noise reduction effect of the volute tongue is improved.

The utility model discloses a power control module, which comprises a power control module main body, and the power control module main body is rotatably connected with a height adjusting assembly used for adjusting the height of the power control module main body. The height adjusting assembly comprises a first connecting rod, a rotating block and a second connecting rod, a first clamping groove is formed in the power control module body, the rotating block is connected into the first clamping groove through a shaft, the rotating block is fixedly connected to one end of the first connecting rod, the first connecting rod is a cylinder, and the second connecting rod is slidably connected into the first connecting rod; and the second connecting rod is filled with paraffin. Compared with the prior art, the power control module is convenient for adjusting the gap between the lower end face of the power control module and the placement surface according to actual conditions, thereby increasing the air flowing space of the lower end face of the power control module, facilitating heat dissipation, and reducing the condition that the service life of the power control module is influenced by high temperature of the power control module.

The utility model discloses a dust collector with a noise reduction air duct. The first shell and the second shell are connected in a clamped mode, the motor cavity is formed in one end of an inner cavity of the second shell and provided with a motor, the exhaust window is formed in the other end of the inner cavity of the second shell, the inner sealing plate is arranged outside the exhaust window in a surrounding mode, the outer sealing plate is arranged outside the first sealing plate in a surrounding mode, and the ventilation opening is formed in the motor cavity and communicated with the motor. The closed groove is formed in one side of the first shell; wherein the inner sealing plate and the outer sealing plate are combined to form a labyrinth type air duct, one end of the air duct extends into the motor cavity and is communicated with the ventilation opening, and the first shell and the second shell are connected in a clamped mode so that the sealing strips can be correspondingly connected with the inner sealing plate and the outer sealing plate in an inserted mode, and therefore a sealed cavity for airflow to penetrate through is defined. Airflow enters the air duct and then is exhausted through the exhaust window; according to the utility model, the labyrinth-shaped air channel is formed between the motor and the exhaust window, so that the flowing space of airflow is increased, and the working noise of the dust collector is reduced.

The utility model relates to the technical field of vision maintenance, in particular to a vision maintenance device which comprises a vision maintenance cover body, fumigation assemblies are arranged on the left side and the right side of the front end of the vision maintenance cover body, and an air hole is formed in the middle of the rear wall of the vision maintenance cover body. The sweat-isolating adsorption assemblies are arranged on the upper side and the lower side of the rear end of the vision maintenance cover body, heat dissipation holes are formed in the left side and the right side of the rear wall of the vision maintenance cover body, a flexible silica gel column is arranged in the middle of the inner side of the vision maintenance cover body, and the wearing assembly is arranged at the rear end of the vision maintenance cover body. Flexible supporting sweat absorption can be carried out through the sweat isolation adsorption assembly, the heat dissipation holes and the flexible silica gel columns are connected to increase the internal air flowing space, sweat absorption is avoided, the adjusting pieces are easy to detach and replace under the connection of the insertion fixing assemblies, face width adjustment is matched, and the vision maintenance mask is convenient to use and high in practicability. And the wearing component is elastically fixed, so that the applicability is improved.