48results about How to "Avoid heat accumulation" patented technology

The invention relates to the technical field of path planning, and discloses a laser fuse additive manufacturing thermal management path planning closed-loop regulation and control system, which comprises a data acquisition module, a data processing module, a temperature distribution prediction module and a path planning regulation and control module, acquiring temperature distribution characteristic data and first characteristic data; the data processing module is used for preprocessing the temperature distribution feature data and the first feature data to obtain a regional feature sequence; the temperature distribution prediction module is used for constructing a temperature distribution prediction model according to the regional feature sequence; and the path planning regulation and control module is used for generating a regulation and control scheme in combination with the improved parrot optimization algorithm and the temperature distribution prediction model. Through combination of temperature prediction, path optimization, multi-dimensional feature extraction and an improved optimization algorithm, global optimization and dynamic regulation and control of the processing process are realized.

The invention discloses a high-temperature-resistant expanded-diameter wire, and relates to the related technical field of high-voltage wires, the high-temperature-resistant expanded-diameter wire comprises an inner skeleton, heat dissipation skeletons, first composite conductive cores and second composite conductive cores, the heat dissipation skeletons are uniformly arranged on the outer side of the inner skeleton, and the first composite conductive cores are symmetrically twisted, wound and embedded on the two sides of the inner end of the heat dissipation skeleton; the second composite conductive cores are symmetrically twisted, wound and embedded on two sides of the outer end of the heat dissipation framework, and rubber bags are arranged on the inner sides of the adjacent second composite conductive cores. The inner-layer first composite conductive core and the middle-layer second composite conductive core are preliminarily fixed through the heat dissipation frameworks, and then the heat dissipation frameworks, the first composite conductive core and the second composite conductive core are fixedly installed in cooperation with the inner framework and the rubber bag. The inner framework, the heat dissipation framework, the first composite conductive core, the second composite conductive core and the rubber bag form a whole, and the overall stability of the device is enhanced.

The utility model provides a novel diesel generating set air inlet and exhaust device which comprises a generating set box and a partition plate, and the partition plate is fixedly connected to the inner side of the generating set box. Compared with the prior art, the air inlet structure has the advantages that due to the design of the strip-shaped air inlet, the air inlet area can be increased, more external air can enter the unit case, the ventilation efficiency is improved, after the external air enters the unit case through the air inlet, the air can enter the main pipe through the flow dividing pipes, passes through the main pipe and the draught fan and is finally exhausted from the exhaust pipe, and the air inlet area is increased. As air flows, heat in the case can be taken away, external air can be more uniformly distributed and circulated in the generator set case, the ventilation and heat dissipation effects of the diesel generator set are more uniform, local overheating is prevented, the design of the air inlets is beneficial to reduction of the temperature gradient in the case, heat dissipation is more uniform, and the service life of the diesel generator set is prolonged. The air duct is designed and connected with the partition plate, so that further heat dissipation in the generator set box can be assisted, and heat accumulation in the generator set box is prevented.

The invention discloses a metal bent pipe surface treatment device, and relates to the technical field of metal bent pipe surface machining. The metal bent pipe surface treatment device comprises a fixed seat, a polishing mechanism is fixedly connected to the top of the fixed seat, a sweeping mechanism is fixedly connected to the interior of the polishing mechanism, and a sweeping mechanism is movably connected to the interior of the polishing mechanism. According to the surface treatment device for the metal bent pipe, the metal bent pipe can be ground through the grinding belt, the grinding belt only enables the part, disconnected from the metal bent pipe, of the grinding belt to be ground during grinding, the grinding position of the grinding belt continuously moves in a circulating mode, and an inner fixing ring can drive the grinding belt to rotate around the circumference of the metal bent pipe through a fixing frame; and the surface of the metal bent pipe is uniformly polished by the polishing belt, so that heat accumulation caused by continuous polishing of one part of the polishing belt is prevented, softening of the polishing belt due to heating and deformation of the metal bent pipe due to heating are prevented, and the machining efficiency is improved.

The invention relates to the technical field of buoy devices, in particular to a floating type marine hydrological observation device which comprises a first cabin, an annular partition plate is fixedly connected to the upper end of the first cabin, a balance mechanism is arranged on the outer side of the annular partition plate, and two sets of symmetrical second fixing plates are fixedly connected to the upper end of the annular partition plate. The ends, close to each other, of the two second fixing plates are jointly and fixedly connected with a second cabin body, the inner side of the second cabin body is fixedly connected with a mounting plate, a cleaning mechanism is mounted at the lower end of the mounting plate, and a ventilation mechanism is mounted below the mounting plate on the inner side of the second cabin body. A maintenance mechanism is installed at the position, close to the middle, of the inner side of the first cabin body, a first sleeve is matched with a cleaning rod, so that a solar cell panel can continuously store light energy under the good maintenance and normal working environment, a discharging pipe outputs fresh water outwards, the outer wall of the solar cell panel is cleaned, and the service life of the solar cell panel is prolonged. And the sliding columns are matched with the guide grooves, so that the ice crushing effect is achieved.

The utility model discloses a line integration device for internet equipment, which comprises a fixed seat, and the top of the fixed seat is fixedly connected with a limiting seat. A user opens the limiting seat, places a circuit in the fixing seat, then resets the limiting seat, operates the fixing assembly, enables the bolt to rotate, and enables the screw to be in threaded connection with the threaded block, so that the limiting seat and the fixing seat can be kept stable, and then the user starts the blowing fan. The blowing fan blows air to the bottom, so that the air is in contact with the wire harness, heat dissipation can be effectively performed on the wire harness, heat dissipation can also be performed through the cooling assembly, heat accumulation of the wire harness is avoided, the safety of the wire harness can be ensured, the body achieves the effect of facilitating heat dissipation, an existing mode that heat dissipation is not performed on the integrated wire harness is replaced, and the heat dissipation efficiency is improved. Therefore, the integrated wire harness can be cooled, and danger caused by overheating of the wire harness is avoided.

The application belongs to the technical field of marine chemical analysis, and relates to an underwater in-situ mass spectrometer acquisition control system and method. The method comprises the following steps: a vacuum extraction step: the coarse extraction mode and the fine extraction mode are adaptively switched, the ion detection device is vacuum-extracted until the pressure is reduced to a preset threshold, and a required vacuum degree is maintained; a preheating preparation step: the membrane sampling device is initially sampled, and heating is performed at the same time until a preset working temperature is reached and the temperature is maintained constant; a dissolved gas formal detection step: the membrane sampling device is continuously supplied with water samples to be detected, and in-situ mass spectrum detection of dissolved gas in the water samples is completed; an instrument cabin gas discharge step: when it is detected that the underwater in-situ mass spectrometer floats to the water surface and the air pressure in the instrument cabin exceeds an upper limit threshold of gas discharge, the instrument cabin is discharged; a liquid leakage protection step: when liquid leakage occurs in the sampling cabin and the two core contacts are short-circuited, the high-pressure electromagnetic valve in the normally open state is closed to quickly block the liquid from entering the ion detection device.

The invention belongs to the technical field of disc brakes, and particularly relates to a ventilation type brake disc with a heat dissipation structure, which comprises two outer side discs and the heat dissipation structure arranged between the two outer side discs. The heat dissipation structure specifically comprises a plurality of heat dissipation ribs, the heat dissipation ribs are distributed between the two outer side discs in a circumferential array mode, the lower side face of each heat dissipation rib is fixedly connected with one outer side disc, the upper side face of each heat dissipation rib makes contact with the other outer side disc, and a ventilation flow channel is formed between every two adjacent heat dissipation ribs. The outer contour of the cross section of each radiating rib comprises an upper side arc, a lower side arc, an inner arc and an outer arc; the inner arc is located on the side, close to the circle center of the outer side disc, of the lower side arc and the upper side arc, the outer arc is located on the side, away from the circle center of the outer side disc, of the lower side arc and the upper side arc, and the width of the inner arc is smaller than that of the outer arc. Therefore, through the arrangement of the multiple radiating ribs, the effective radiating area of the brake disc is increased, the convection heat exchange efficiency is improved, the radiating effect is remarkably improved, and heat accumulation is restrained.

The utility model discloses an air bag atmosphere sampler which comprises a machine shell and a main control panel located at an opening in the upper portion of the machine shell, the machine shell and the main control panel jointly form an inner cavity, heat dissipation holes are formed in the machine shell, a plurality of three-way electromagnetic valves and a plurality of one-way electromagnetic valves are arranged in the inner cavity, and each one-way electromagnetic valve is connected with a rubber pipeline. The free end of the rubber pipeline is connected to the main control panel through a vacuum box connecting air nozzle, and a magnet is installed on the coil side of the one-way electromagnetic valve through a magnet fixing plate. According to the electromagnetic valve, the structural design is optimized, heat production equipment is arranged in a scattered mode, heat accumulation is prevented, the working condition that a conventional electromagnetic valve needs to be electrified in the whole process when used is changed by additionally arranging a magnet on the single-way electromagnetic valve, switching of the electromagnetic valve can be achieved only through transient electrification, and the cost is reduced. Therefore, the problem that the coil continuously generates heat in the electrifying process of a conventional electromagnetic valve is fundamentally solved.

The utility model relates to the technical field of curtain walls, in particular to an air circulation type double-layer glass curtain wall which comprises a frame body used for fixedly installing an inner-layer curtain wall, a first base is fixed to the center of the front end face of the frame body, a first connecting piece is installed in the first base, and the other end of the first connecting piece is connected with an outer-layer curtain wall. A second base is arranged on the front end face of the frame body, the other end of the second base is connected with a second connecting piece used for connecting two adjacent outer-layer curtain walls, and a ventilation structure is arranged on the second connecting piece so that air on the two sides of the outer-layer curtain walls can circulate. The ventilation structure is arranged on the second connecting piece used for being connected with the outer-layer curtain wall, so that air located on the two sides of the outer-layer curtain wall can circulate more efficiently, air circulation between the double-layer curtain wall and the outside is promoted, heat accumulation in the double-layer curtain wall is avoided, and comfort of the environment in a building is kept.

The invention discloses an energy-saving and environment-friendly detection device for a green building in the technical field of energy-saving and environment-friendly detection.The energy-saving and environment-friendly detection device comprises a detection unit, a moving unit and a controller, the detection unit comprises a box body, an installation groove is formed in the upper portion of the box body, and a wind speed detection assembly, a temperature detection assembly and a humidity detection assembly are installed in the installation groove; an air amplifier is mounted behind the wind speed detection assembly, an opening is formed in the mounting groove at the wind speed detection assembly, and a wind whistle structure is arranged at the opening; and the controller is used for controlling the detection unit to perform data acquisition according to a preset program and controlling the moving unit to move so as to perform detection at different positions, and processing and analyzing the received detection data to generate a corresponding report. The invention aims to realize comprehensive, real-time and accurate monitoring of environment parameters of the green building, avoid the influence of dew or impurities on the detection device and reduce the damage to the structure and function of the building.

The present invention discloses a wireless microwave rectifier antenna, comprising a dielectric substrate, a microstrip feeder is arranged at the edge of the through hole, the microstrip feeder is electrically connected to an input filter, the input filter is electrically connected to a matching circuit, the matching circuit is electrically connected to a rectifier diode, and the output filter is electrically connected to a capacitor and a load respectively; the lower surface of the dielectric substrate is bonded to a metal plate, the heat absorbing plate is bonded to the lower surface of the dielectric substrate, a plurality of heat-conducting columns are fixedly arranged on the heat-absorbing plate, a plurality of side heat-conducting plates are fixedly arranged at one end of the heat-conducting column away from the heat-absorbing plate, and the side heat-conducting plates are buried in a water-absorbing plate. The present invention provides a wireless microwave rectifier antenna, which has good cooling and heat dissipation and waterproof effects, and the absorbed moisture can accelerate heat dissipation, and the absorbed heat can promote the drying of the water-absorbing plate, the two complement each other, turning harm into benefit, and is very worthy of promotion.

The utility model belongs to the technical field of blanking cooling, and particularly relates to a blanking cooling device for a refining furnace, which comprises a bearing frame, moving wheels are fixedly connected to the bottom of the bearing frame. The moving wheels are symmetrically arranged at the bottom of the bearing frame; the top of the bearing frame is fixedly connected with a cooling box; a cooling bin is arranged in the cooling box; a groove body is arranged between the cooling box and the cooling bin; a water storage tank is fixedly connected to the interior of the bearing frame; a circulating pump is mounted on the side wall of the water storage tank; the output end and the input end of the circulating pump are connected with a connecting pipe; the input end of the connecting pipe is arranged at the inner position of the water storage tank; the output end of the connecting pipe is arranged in the cooling box; a water outlet is formed between the water storage tank and the cooling tank; by means of the structure, the cooling pool and the circulating cooling system are arranged, heat accumulated in the transfer cavity can be rapidly taken away, the heat accumulation phenomenon is avoided, and normal operation and the service life of equipment are guaranteed.

The utility model discloses a kind of power collection line distributed protection devices, including warning component and temperature detection component, the temperature detection component includes lower arc shell and upper arc shell, one end between lower arc shell and upper arc shell is rotatably connected by pin shaft, the one end of lower arc shell and the one end of upper arc shell are fixedly connected with connecting block, connecting bolt is inserted between two connecting blocks, the one end of connecting bolt is threadedly connected with nut, the circumference of lower arc shell and upper arc shell is equipped with two air vents, the inside wall of the two sides of lower arc shell and upper arc shell is adhesively connected with antiskid pad, and multiple ventilation grooves are provided on antiskid pad.The utility model is fixedly wrapped in the fiber-optic temperature measuring point of cable by lower arc shell and upper arc shell, and temperature sensor is contacted with the fiber-optic temperature measuring point of cable, this kind of mode avoids overwrap, thereby avoiding heat accumulation at temperature measuring point, and improving the accuracy of cable temperature detection.

The utility model discloses cooking equipment in the technical field of cooking utensils, which comprises a shell and a base, a motor frame, an air guide disc and a heat cycle component are arranged in the shell, and a cooking cavity is formed below the air guide disc; a containing cavity is formed between the motor frame and the upper portion of the shell, a cold air cavity is formed between the motor frame and the air guide disc, second fan blades are arranged in the cold air cavity, the driving motor drives the second fan blades to rotate in the cold air cavity, a surrounding plate is arranged on the periphery of the second fan blades in a surrounding mode, and the surrounding plate is arranged in the containing cavity. The two ends of the surrounding plate abut against the motor frame and the air guide disc correspondingly, and an air guide cavity is formed in the surrounding plate. According to the utility model, the flowing parts of the cold air are arranged around the accommodating cavity, the motor frame and the air guide disc, and the cold air is concentrated to circulate around the parts, so that the heat accumulation of the parts such as the accommodating cavity, the motor frame and the air guide disc is avoided, and the parts are cooled in time, thereby ensuring the service life of the electric parts, improving the working performance of the electric parts and improving the heat dissipation efficiency.

The utility model relates to the field of converter devices, and particularly discloses a glue pouring type LLC resonant converter, which comprises a converter shell, a fan body, a dustproof structure and a cover body, the converter shell is internally provided with a shell inner frame, the shell inner frame is provided with an LLC resonant converter, the converter shell is provided with a heat dissipation groove, the fan body is arranged in the heat dissipation groove, the fan body is provided with a fan support, the fan support is fixed in the converter shell, and the fan support is provided with a fan. A dustproof structure is arranged outside a heat dissipation groove in the converter shell, a cover body is arranged on the top of the converter shell, side connecting blocks are arranged on the two sides of the cover body, block holes are formed in the side connecting blocks, shell side holes are formed in the two sides of the converter shell, the shell side holes correspond to the block holes in position, first bolts are arranged on the side connecting blocks, and second bolts are arranged on the side connecting blocks. A glue filling device is arranged on the top of the cover body; the LLC resonant converter provided by the utility model has the advantages of excellent heat dissipation performance and convenience in glue filling.

The invention relates to the technical field of active filters, and discloses a high-performance anti-interference active filter device, which comprises a protection assembly, a heat dissipation assembly, a cooling assembly and an active filter, and is characterized in that the protection assembly is located at the top of the heat dissipation assembly, the cooling assembly is located in the protection assembly, and the active filter is located at the top of the heat dissipation assembly; the cooling assembly is arranged in the protection assembly and corresponds to the active filter; cooling liquid in a water tank is cooled through a cooling fan and cooling fins, the cooling liquid is input to the outer side of an air conveying pipe through a water pump, the effect of cooling air in the air conveying pipe is achieved, and then the cooled air conducts uniform cold air outlet on the surface of the active filter through a second flow dividing pipe and a third flow dividing pipe. In addition, the cooling liquid is located on the outer side of the protective cover, so that the cooling liquid is prevented from leaking out and making contact with the active filter.

This invention relates to the field of water-guided laser technology, and discloses a control method and device for water-guided lasers, as well as a readable storage medium. The control method for water-guided lasers includes the following steps: using a coaxial vision sensor to acquire a coaxial image of the nozzle inlet end face and the laser focused spot through a first optical axis, where the first optical axis is shared by the beam splitter and the water-guided laser optical path; and performing dark field correction processing on the coaxial image. This water-guided laser control method, by acquiring a coaxial image of the nozzle inlet end face and the laser focused spot through a coaxial vision sensor, changes the ratio of meridional rays to oblique rays incident on the water jet, transforming the energy distribution of the water jet cross-section from a centrally concentrated Gaussian-like distribution to a uniform distribution with sufficient energy at the edges. This effectively solves the problem of uneven processing caused by insufficient edge energy in traditional water-guided laser processing, improving processing accuracy and surface quality.

The utility model belongs to the technical field of Bluetooth earphone chip heat dissipation, and discloses an earphone decoding chip heat dissipation assembly, which comprises a C-shaped exposed heat dissipation part, a decoding chip pressing plate and two groups of clip-shaped fixing chucks, the horizontal decoding chip pressing plate is arranged in the C-shaped exposed heat dissipation part, the clip-shaped fixing chucks are arranged at the two ends of the C-shaped exposed heat dissipation part, and the clip-shaped fixing chucks are arranged in the C-shaped exposed heat dissipation part. The C-shaped exposed heat dissipation part, the decoding chip pressing plate and the concentric-square-shaped fixing clamping head are integrally machined by metal, the C-shaped exposed heat dissipation part is fixedly installed on one side of the shell, one side of the C-shaped exposed heat dissipation part is exposed outside and makes contact with air, a decoding chip is arranged below the decoding chip pressing plate, the decoding chip pressing plate is attached to the top face of the decoding chip, and the C-shaped exposed heat dissipation part is fixedly installed on the other side of the shell. According to the utility model, the structure design is compact and reasonable, heat generated by the decoding chip in the Bluetooth earphone can be conducted to the outside to be dissipated, the heat accumulation of the decoding chip can be prevented, the frequency can be prevented from being reduced, the service life of the decoding chip can be prolonged, and the heat dissipation performance is excellent.

The utility model relates to the technical field of totally-enclosed frequency converters, and discloses a three-proofing totally-enclosed frequency converter, which comprises a three-proofing frequency converter body, the back surface of the three-proofing frequency converter body is fixedly connected with two mounting plates through four cross rods, and a copper plate is embedded in the middle of the back surface of the three-proofing frequency converter body. A normally-open temperature control switch and a plurality of fins are fixedly arranged on the surface of the copper plate, an air inlet and an air outlet are formed in the bottom end of the three-proofing frequency converter body and the top of one side of the three-proofing frequency converter body respectively, and a filter box and an exhaust pipe are fixedly arranged at the bottom end of the air inlet and one side of the air outlet respectively. Heat in the three-proofing frequency converter body can be absorbed through the copper plate, heat exchange with outside air can be achieved through the fins, the temperature in the three-proofing frequency converter body can be reduced, and when the temperature of the copper plate is higher than the threshold value of the normally-open temperature control switch, the normally-open temperature control switch can control the induced draft fan to actively work; the draft fan can exhaust air in the three-proofing frequency converter body, and the blocking cover is opened.

The invention discloses a waste lithium battery black powder crushing and sorting device and a recovery process in the technical field of waste lithium battery black powder recovery, and the waste lithium battery black powder crushing and sorting device comprises a feeding unit, an electrode material dissociation unit and a sorting and enriching unit which are sequentially arranged along the material flow direction, comprising an active material collection system, a metal current collector separation system and an electrode active material purification system, and inert gas protection and temperature monitoring are introduced in the core link of crushing and dissociation, so that the risk of combustion explosion is eradicated fundamentally, the chemical stability of an electrode material is guaranteed, and the service life of the electrode material is prolonged. Secondly, shearing and crushing are adopted to optimize the dissociation effect, pneumatic separation, eddy current and magnetic separation multi-stage and precise separation technologies are combined, a returned material crushing closed circuit is innovatively introduced, the black powder collection rate and the separation purity and total recovery rate of copper and aluminum metal are greatly improved, and finally, the recovery rate of the copper and aluminum metal is increased. All the units are integrated into a continuous automatic system, and maximum utilization of resources is achieved.

The present invention discloses a fire-resistant cable bridge, which belongs to the technical field of cable bridges, including a fire-resistant bridge mechanism, wherein the fire-resistant bridge mechanism includes a fire-resistant cover body and a fire-resistant trough body with a cavity interlayer, a plurality of heat dissipation holes are linearly arranged at equal intervals on both sides of the outer wall of the fire-resistant trough body, a sealed heat dissipation pipe is arranged in each heat dissipation hole, rectangular grooves are arranged on both sides of the inner wall of the fire-resistant trough body, a supporting mesh plate is arranged in both rectangular grooves, a guide cover body and a plurality of cable clamps in a waterproof frame are arranged on the upper side of the supporting mesh plate, and a heat-conducting sealing protection mechanism is arranged on the upper side of the outer wall of the guide cover body. Through the present invention, when a fire occurs and the temperature is abnormally high, the heat dissipation holes can be closed automatically to prevent external heat from entering the interior of the bridge frame, and at the same time, the heat on the bridge frame itself can be absorbed and taken away, so as to avoid heat accumulation in the bridge frame and the high temperature not being reduced, further protecting the cables laid inside, and effectively preventing the cable sheath from being coked and damaged.

The invention discloses a highly safe lithium ion battery positive electrode sheet and a lithium ion battery comprising the positive electrode sheet, wherein the positive electrode sheet comprises a positive electrode current collector and a positive electrode active material layer attached to the positive and negative surfaces of the positive electrode current collector, the surface of the positive electrode current collector is coated with an inorganic polysilazane-polydopamine-graphene composite coating, and the positive electrode active material layer is coated on the surface of the inorganic polysilazane-polydopamine-graphene composite coating. The highly safe lithium ion battery positive electrode sheet of the invention has the characteristics of effectively avoiding copper precipitation, avoiding heat accumulation, excellent rate performance and good cycle life.

The utility model relates to the technical field of wind power generation, and discloses a wind power tower tube heat dissipation device which comprises a tower body, an air inlet pipe and an air outlet pipe, the bottom of the tower body is connected with a first waterproof elbow through the air inlet pipe, an installation ring is arranged in the first waterproof elbow, a dust filtering net is welded to the installation ring through a support, and the air outlet pipe is connected with the air inlet pipe. A vibration motor is installed at the top end of the support, the top of the tower body is connected with a guide pipe through an air outlet pipe, and the air outlet pipe is connected with the tower body through a reinforcing assembly; the utility model has the beneficial effects that air supply and air exhaust can be respectively performed through the bottom and the top of the tower body through the air supply fan and the air draft fan, airflow can vertically rise through the interior of the tower body, the conveying path of the airflow is expanded, heat can be carried to be discharged through the air outlet pipe at the top of the tower body, heat accumulation at the top of the tower body can be prevented, and the service life of the tower body is prolonged. The overall heat dissipation effect in the tower body is improved, and the dust filtering net can filter dust in airflow in the air inlet process.

The invention relates to the technical field of wind power transmission, in particular to a high-stability module based on a compound planet gear in a wind power gear box, which comprises a combined planet carrier, and an input shaft, an output shaft, a first planet pin and a second planet pin are mounted in the combined planet carrier. According to the high-stability module based on the compound planet gear in the wind power gear box, internal gear oil is driven to be driven outwards by adopting a centrifugal phenomenon generated in the gear rotating process, so that internal heat can be rapidly conducted outwards, internal heat accumulation is greatly avoided, and the heat dissipation effect of a whole planet gear set is improved; by adopting the design that the diversion trenches are formed inside, the external space is not occupied, and the utilization rate of the internal space is greatly improved; the lateral flow guide heat exchange cover communicated with the annular flow guide groove is fixedly assembled on the arc-shaped surface of the inner side of the combined planet carrier, heat can be quickly conducted to the outer side of the combined planet carrier through the lateral flow guide heat exchange cover, and the outer side heat dissipation effect is improved.

The utility model discloses a cooling and fresh-keeping device for zongzi production, and relates to the technical field of food fresh-keeping. The device comprises a support frame; the mounting seat is rotationally mounted on the supporting frame through a rotating seat, and the mounting seat is driven by a driving component to rotate; and the rotary drum comprises an inner-layer drum and an outer-layer drum which are coaxially arranged, and the inner-layer drum and the outer-layer drum are both of hollow structures. According to the utility model, the driving component drives the double-layer hollow rotary drum to rotate, a bidirectional three-dimensional air supply system formed by direct blowing of the center shaft through hole and side blowing of the circumferential spray head is combined, and the through-type ventilation design of the hollow bearing structure is matched, so that the problems of low efficiency of traditional standing cooling and single airflow of rotary equipment are effectively solved; cooperative circulation of outward diffusion of cold air from the center of the rotary drum and horizontal penetration of the side face is achieved, the cooling uniformity inside and outside the zongzi is remarkably improved, center heat accumulation caused by stacking is avoided, and the cooling time is greatly shortened on the premise that food sanitation and safety are guaranteed.

The utility model relates to the technical field of resistor elements, and discloses a small-diameter multi-turn wire-wound potentiometer, which solves the technical problems that the diameter and the volume of the multi-turn wire-wound potentiometer can be obviously reduced by forming a current terminal channel which does not need a traveling spring structure, but the heat dissipation space is reduced, and the heat dissipation of the potentiometer is inconvenient. Comprising a copper sleeve and a winding potentiometer body, a plurality of ventilation openings are formed in the surface of the copper sleeve, protective nets are arranged on the surfaces of the ventilation openings, a plurality of copper sheets are fixedly connected to the inner walls of the protective nets, a connecting ring is fixedly arranged at the top end of the copper sleeve, a supporting ring is fixedly arranged at the bottom end of the copper sleeve, and the winding potentiometer body is arranged in the copper sleeve; according to the utility model, the surface of the shell is provided with the heat dissipation ports, so that the circulation of air inside and outside the shell can be ensured, heat accumulation of the winding potentiometer main body can be prevented, and the copper sleeve and the copper sheet have good heat conduction capability, so that the temperature of the winding potentiometer main body can be reduced, and heat dissipation can be performed on the winding potentiometer main body.

The cable hanging and twisting device comprises a bearing inhaul cable and cable fixing discs, the bearing inhaul cable is vertically arranged in the center of a tower, the upper end of the bearing inhaul cable is fixedly connected with a base, the cable fixing discs are fixed to the bearing inhaul cable in a clamped mode, the cable fixing discs clamp and fix a cable, and the cable fixing discs are connected with the bearing inhaul cable in a clamped mode. The cable is distributed around the load-bearing inhaul cable. When not yawing, the cable between the cable fixing discs is loose. A through hole is formed in the middle of the maintenance platform so that the bearing inhaul cable can penetrate through the through hole, the cable fixing disc close to the maintenance platform is fixedly connected with the rotary support, and the rotary support rotates around the middle of the maintenance platform through the rotary bearing. The cable hanging and twisting device can greatly reduce stretching of the cable caused by gravity load and avoid heat accumulation caused by dense arrangement. Main connecting points of the cable fixing device are located in the middle of the maintenance platform, and maintenance difficulty and workload are reduced. The cable fixing device is simple in structure and convenient to install and maintain.

The invention relates to a QFN multi-core sealed heat dissipation structure and a processing technology thereof, and relates to the technical field of QFN packaging, the QFN multi-core sealed heat dissipation structure comprises a plurality of substrates for chip installation, the bottom of each substrate is provided with a heat dissipation bonding pad which can be exposed on the bottom surface of a plastic package body, the substrate is connected with a heat conductor, the heat conductor is connected with a heat dissipation plate, and the heat dissipation plate is connected with a heat dissipation chip. Heat on the substrate can be conducted to the heat dissipation plate through the heat conductor, and the heat dissipation plate can be exposed on the top surface of the plastic package body. The heat dissipation area of the QFN multi-core sealed semiconductor device can be increased, the influence of the circuit board on heat dissipation is reduced, heat accumulation of the semiconductor device is effectively avoided, and the operation stability of the QFN multi-core sealed semiconductor device is improved.