85 results about "Heat induced" patented technology

The invention relates to the technical field of bearing machining, in particular to bearing outer surface grinding equipment for bearing machining and a using method, the bearing outer surface grinding equipment comprises a machine table serving as a mounting base, and a supporting plate is arranged on the machine table. According to the bearing outer surface grinding equipment for bearing machining and the using method, through the collaborative design of the bimetallic strip and the offset bush, heat transfer triggers the bimetallic strip to be heated and unfolded, the guide wheel is pushed to axially displace along the conical offset bush and achieve radial offset, the displacement amount for enlarging the grinding gap is in direct proportion to temperature rise, and the grinding efficiency is improved. By means of thermal induction linkage of the temperature guide pin, the thermosensitive liquid and the cylinder sleeve, the temperature guide pin is heated to promote the thermosensitive liquid to expand during thermal expansion of the workpiece, the supporting plate is pushed to automatically lift, so that a contact point of the workpiece moves upwards, an effective grinding gap is expanded in a disguised mode, and dual adjustment is formed with radial deviation of the guide wheel. The thermal expansion change of the workpiece is further adapted, and the grinding resistance and the workpiece damage risk are reduced.

The utility model provides a double-layer medium frequency heating inductor, wherein the first layer of the double-layer medium frequency heating inductor is a heating coil, and the second layer is a cooling coil; the heating coil is energized for medium frequency heating, and the cooling coil is sprayed with water for water cooling; compared with the prior art, the utility model can control the temperature difference between the inner and outer walls of the composite elbow during bending and after cooling to below 25°C, and the surfacing layer of the inner layer of the produced elbow will not crack.

The present invention discloses a thermomechanical treatment device and its process method, including a machine body, a frame body and a top seat. The top seat is connected above the machine body through the frame body. A processing position is arranged on the upper surface of the machine body. A steel strip is placed at the processing position. The steel strip is introduced into the processing position by a steel strip guide wheel. Symmetrically arranged on both sides of the processing position and capable of lifting are upper pressing devices for the steel strip. The upper pressing devices for the steel strip can press and clamp both ends of the steel strip. On one side of the processing position, there is a weld protection device that can be buckled on the steel strip and a lower backing plate that can be moved under the steel strip. Below the processing position, there is a lower heating intermediate frequency probe, and above it, there is a rolling head that can be moved up and down. The present invention can make the hardness of the weld and the heat-affected zone closer, eliminate the residual stress of the weld, and make the hardness and structure closer to or slightly higher than those of the base material, thereby ensuring the fatigue life and tensile strength of the coiled tubing.

A method for induction quenching and leaving a soft zone for ultra-long machine tool guide rails is described. This method is suitable for machine tool guide rails that are prone to cracking at the initial end after quenching or require machining (such as milling or drilling). The method belongs to the field of heat treatment technology. The method includes the following steps: aging, machining, stress relief, medium-frequency induction quenching, and tempering the ultra-long guide rails. The medium-frequency induction quenching utilizes two inductors: one preheating inductor and one quenching inductor. The two inductors are spaced 15-20 mm apart, and the distance between the inductor surface and the quenching surface is 4-6 mm. Heating and quenching begin at a point more than 20 mm from the edge of the machine tool guide rail at the initial end of the quenching process. After this quenching process, the hardness of the quenched area of ​​the guide rail reaches 55-60 HRC, the layer depth reaches 5.0-7.6 mm, and the soft zone length is 20-25 mm. The soft zone still retains the original hardness of the cast iron.

The utility model discloses passive self -triggering fire extinguishing module device of extensible heat induction line relates to electrical equipment fire prevention device technical field, it includes fire extinguishing module main part still includes: setting on the induction line mechanism of fire extinguishing module main part, and induction line mechanism is used for triggering fire extinguishing module main part to start, the induction line mechanism contains with the first induction line and second induction line of fire extinguishing module main part connection, and first induction line and second induction line between setting have expansion component, the expansion component contains bellows, and both ends of bellows all are provided with fixed block, be provided with clamping block on the fixed block, and clamping block and fixed block cooperation is used for locking first induction line or second induction line, the inside of bellows is provided with connecting component, and connecting component is used for intercommunication first induction line and second induction line. The heat induction line of passive self -triggering fire extinguishing module device of extensible heat induction line can expand, thereby fast induction and extinguish initial electrical fire.

The utility model discloses a thermal induction aluminum foil sealing machine, which relates to the field of aluminum foil sealing machines. The thermal induction aluminum foil sealing machine comprises a sealing machine frame and a conveyor belt installed on the top of the sealing machine frame, an electromagnetic induction heater is arranged above the conveyor belt, and an adjustment mechanism is arranged on the sealing machine frame, and the adjustment mechanism comprises an angle adjustment member and a position adjustment member. The thermal induction aluminum foil sealing machine adjusts the distance between two groups of positioning strips by rotating a bidirectional screw rod, and drives the positioning strips to move by rotating a fine adjustment screw rod, so that the position of the bottle body is adjusted on the conveyor belt to ensure that the bottle mouth can face the electromagnetic induction heater, and then drives the screw rod by rotating to make the sliding seat move up and down on the outer surface of the slide rail, and drives the electromagnetic induction heater to flip by a traction rod, and adjusts the direction of the electromagnetic induction heater so that it can face the bottle mouth, thereby adapting to various special-shaped bottles for aluminum foil sealing processing, and having stronger applicability.

The present application relates to a kind of energy-saving ceramic tile firing roller kiln applied to roller furnace field, including firing control box, temperature control system, furnace body and the exhaust system of installation on the upside of furnace body, through the collaborative operation of balanced temperature sensing system, waste heat sensing structure and horizontal sensing structure, the temperature variation state of different position flue gas waste heat can be accurately captured, real-time display and predict the temperature uniformity condition of each section in furnace body, further can timely and effectively implement temperature control compensation measures in furnace body, effectively avoid the risk of temperature uniformity imbalance in furnace body, guarantee the quality of ceramic tile firing in furnace body, significantly improve the finished product pass rate, and by promoting the dynamic balance control effect of temperature control system to the temperature in furnace body, greatly reduce the energy loss in temperature regulation process, comprehensively improve the economic efficiency of roller kiln in ceramic tile firing.

The utility model belongs to the technical field of cameras, and particularly relates to a device capable of realizing real shooting at constant temperature, which comprises a heating mechanism and a jig used for fixing a camera module, the heating mechanism comprises a U-shaped foundation, a heating element arranged in the U-shaped foundation and a heat sensor fixed on the U-shaped foundation, and the heating element is arranged on the U-shaped foundation. The jig is fixed in a U-shaped groove of the U-shaped foundation, and the sensing end of the heat sensor is in contact with the jig. According to the utility model, the heat generated by the heating element is transmitted to the camera module through the U-shaped base and the jig, and the temperature of the jig is accurately monitored in real time by the heat sensor, so that the temperature of the camera module is kept within a set range in a real shooting process, and the test precision and efficiency are greatly improved.

The invention discloses a heat balance injection molding method based on induction heating-traditional temperature control fusion, and belongs to the technical field of plastic processing. In order to solve the problems that in the heating process of a traditional injection mold, heat lag is obvious, energy consumption waste is serious, and temperature field control of a single heating mode is insufficient, the technology achieves dynamic stability of a mold temperature field through the cooperation mode of mold temperature controller basic temperature control and temperature rise provided through induction heating in combination with dynamic heat balance in a continuous injection molding period. The method comprises the specific steps of mold basic temperature preheating, induction heating parameter adaptation, continuous injection molding heat balance maintenance and process parameter dynamic optimization. The method has the advantages of feasibility and energy conservation, and a new scheme is provided for consumption reduction in the injection molding industry.

The invention discloses a circuit board and a preparation method and a heat measuring method thereof, the circuit board is provided with a thermal induction layer, and the thermal induction layer is arranged on one side of the circuit board and / or in the circuit board; the thermal induction layer comprises a thermal resistance layer, a first thermistor layer and a second thermistor layer, wherein the first thermistor layer and the second thermistor layer are stacked on the two sides of the thermal resistance layer. A first thermosensitive unit is arranged on the first thermistor layer, one side of the first thermosensitive unit is grounded, and the other side of the first thermosensitive unit is conducted with an external controller through a first bonding pad; a second thermosensitive unit is arranged on the second thermistor layer, one side of the second thermosensitive unit is grounded, and the other side of the second thermosensitive unit is conducted with an external controller through a second bonding pad; and the first thermosensitive unit and the second thermosensitive unit are correspondingly arranged along the thickness direction. The thermal induction layer can be compatible with the manufacturing process of the circuit board, the occupied space is small, the production cost is low, the detection precision is high, and continuous and automatic real-time monitoring on key areas of the circuit board or a battery pack and the like can be effectively achieved.

The present application belongs to the field of heat treatment device, and relates to a double-inductor device suitable for induction quenching of right-angle surface cast iron guide rail. The device comprises a preheating inductor and a quenching inductor, and the preheating inductor is fixedly connected with the quenching inductor. The preheating inductor comprises a preheating inductor connecting row, and preheating inductor water nozzles are arranged on both sides of the preheating inductor connecting row. The preheating inductor connecting row is fixedly connected with a preheating inductor fixed plate, the preheating inductor fixed plate is fixedly connected with a preheating inductor support, a preheating inductor induction coil is fixedly arranged on the preheating inductor support, a preheating inductor magnet is fixedly arranged on the preheating inductor induction coil, the preheating inductor induction coil comprises a first preheating inductor coil and a second preheating inductor coil, and the first preheating inductor coil and the second preheating inductor coil are connected perpendicularly. The two inductors are used in cooperation, the depth of the hardened layer of the guide rail is increased, and the device is particularly suitable for induction quenching of the position of the right-angle guide rail of the machine tool cast iron.

The application relates to the field of PTC thermistors, in particular to a sheet type PTC thermistor and a preparation method thereof. The sheet type PTC thermistor comprises a heat-conducting insulating framework and a PTC high polymer matrix, the heat-conducting insulating framework is a face-centered cubic structure PU framework and high-heat-conducting insulating particles coated on the surface of the PU framework; the PTC high polymer matrix is made of the following raw materials in mass percentage: 15-30% of hydrophobic modified conductive composite filler, 0.5-2% of anti-aging auxiliary agent, 0.2-0.8% of zinc stearate, and the rest is a thermoplastic high polymer resin with high linear thermal expansion coefficient. The heat induction sensitivity of the application is relatively excellent, the temperature induction lag time of the thermistor is shorter, the temperature monitoring module applied to a lithium battery cell can timely give an early warning, the safe driving coefficient of a vehicle is improved, and the property loss and the personal injury risk are reduced.

The invention discloses sludge drying equipment and a using method thereof. The sludge drying equipment comprises a thermal induction type vibration driving mechanism, a disc-shaped drying mechanism, an automatic discharging control mechanism and a drying box body assembly. The invention belongs to the technical field of drying devices, and particularly relates to sludge drying equipment and a using method thereof. Heat of high-temperature airflow can be used for driving the rotating assembly to rotate continuously and slowly through the thermal induction type vibration driving mechanism, functional area division is conducted on the whole annular area through the drying box body assembly, and therefore the rotating assembly can rotate continuously in the continuous rotating process; a series of steps such as feeding, drying and discharging can be completed in sequence; in addition, through the automatic discharging control mechanism, the technical effects that the rotating disc assembly is automatically opened when reaching the designated position and is automatically closed after discharging is completed can be achieved.

This invention discloses an induction heating system for heat-fitting an energy-saving centrifugal pump impeller, comprising a positioning mechanism, a heat-fitting mechanism, a heating induction mechanism, and a control system. The positioning mechanism fixes the pump shaft and guides the movement of the slide. The heat-fitting mechanism drives the slide to translate along the positioning rod via a drive assembly. The heating induction mechanism includes a rod-shaped first heating assembly and a spiral disc-shaped second heating assembly, which independently induction heat the impeller's inner bore and side surface, respectively. The control system includes a first temperature sensor for collecting the temperature of the impeller's inner bore and a second temperature sensor for collecting the temperature information of the impeller's side surface. The system controls the operation of the first heating assembly, the second heating assembly, and the drive assembly in real time based on the feedback information from the first and second temperature sensors. This invention, through zoned independent heating and temperature difference regulation, ensures effective expansion of the inner bore, avoids end face warping and inner bore taper deformation, effectively prevents impeller jamming and pump shaft scratches, and improves the success rate of heat-fitting.

A thermal sensing device for a thermal control automation instrument, comprising: a fixing assembly (100), comprising a housing (101), an accommodating cavity (102) provided inside the housing (101), a placement plate (103) provided on the inner wall of the accommodating cavity (102), a temperature sensing part (104) provided at an end portion of the placement plate (103), and a fixing ring (105); and pushing assemblies (200), each comprising a fan (201), a rotating disc (202) provided on the outer wall of the fan (201), a support (203) provided on the outer wall of the rotating disc (202), and an arc plate (204) provided outside the support (203). By means of the placement plate (103), the temperature sensing part (104) is fixed at the bottom of the housing (101), and is close to an automation instrument below, thus conveniently measuring the temperature of the automation instrument in real time. When the placement plate (103) is normally fixed, the temperature sensing part (104) operates normally; and the fan (201) would expel heat generated by other internal elements, thereby avoiding interference with the temperature sensing part (104); and when the position of the placement plate (103) deviates, the arc plate (204) moves to drive clamping rods (105h) at the bottom of the placement plate (103) to clamp a threaded cylinder (101b), so that the placement plate (103) is fixed and would not cause the deviation of the position of the temperature sensing part (104).

The present invention discloses a multifunctional constant temperature and humidity chamber, including a constant temperature and humidity chamber assembly, wherein a reaction piston type hot and cold water regulating assembly, a constant temperature and humidity chamber thermal sensing assembly and a high-pressure water tank assembly are arranged in the constant temperature and humidity chamber assembly. The reaction piston type hot and cold water regulating assembly is arranged between the constant temperature and humidity chamber thermal sensing assembly and the high-pressure water tank assembly. The present invention realizes the self-regulation of heating, heat preservation and cooling of the constant temperature and humidity chamber assembly through the structure of the reaction piston type hot and cold water regulating assembly. At the same time, the constant temperature and humidity chamber thermal sensing assembly forms a piston driving structure in the constant temperature and humidity chamber assembly to trigger the self-regulation of the reaction piston type hot and cold water regulating assembly. The constant temperature and humidity chamber thermal sensing assembly serves as a triggering structure for temperature control self-regulation. At the same time, the high-pressure water tank assembly forms a water storage tank structure in the constant temperature and humidity chamber assembly to supply rated pressure to the reaction piston type hot and cold water regulating assembly.

The present invention discloses a thermal performance testing device for an aluminum rod, and belongs to the technical field of thermal performance testing for metal rods. A thermal performance testing device for an aluminum rod comprises a workbench and an aluminum rod, a supporting device is connected through the left and right center lines of the workbench surface, an electromagnetic heating tube is fixedly installed at the center of the right side of the workbench surface, an insulating fixing seat is arranged on the left side of the electromagnetic heating tube, and an aluminum rod is connected inside the electromagnetic heating tube, and the aluminum rod passes through the insulating fixing seat, a mobile testing device is connected to the rear end of the workbench surface, a driving device is connected to the mobile testing device, a thermal conductivity testing device is connected to the driving device, and a heat dissipation testing device is fixedly connected to the bottom of the mobile testing device. The present invention not only measures the thermal conductivity of the aluminum rod through a thermal sensing strip, but also triggers a paddle to rotate counterclockwise to turn on a start switch during the process of the thermal sensing strip pressing the aluminum rod, so that the thermal sensing strip is simultaneously used to measure the heat dissipation performance of the aluminum rod.

The invention relates to the technical field of vacuum melting and dipping, in particular to a vacuum melting and pouring integrated device. The device mainly comprises a furnace body, a vacuumizing mechanism, a crucible translation mechanism and a crucible lifting mechanism, a smelting heating sensor and a pouring heating sensor are fixedly arranged in the furnace body, and when the interior of the furnace reaches a vacuum condition, the smelting heating sensor and the pouring heating sensor work synchronously; the metal material in the smelting crucible and the to-be-impregnated product in the product crucible are rapidly heated, and then the metal solution is poured into the to-be-impregnated product, so that the vacuum full impregnation effect of impregnating the to-be-impregnated product is achieved. The process from metal or alloy smelting to product pouring is achieved in the furnace body at the same time, meanwhile, the device has the advantages of being efficient, high in reliability and safety, and the actual industrial large-scale production requirement of equipment can be met.

A deposition system (1) is disclosed herein for heat induced deposition of a donor element (d1, d2,...,d6) from a donor surface (2s) onto a target surface (Ts). The deposition system comprises at least one heater strip (2), a power supply (3), a selection module (4), a voltage and current sensing facility (6) and a control unit (5). The at least one heater strip (2) comprises a plurality of serially arranged resistive heating elements (h1, h2,...) for heating respective zones (2s1, 2s2,...) of the donor surface (2s), the resistive heating elements having a temperature dependent resistance. The selection module (4) is configured to alternately supply an electric power from the power supply (3) to a selected one of the serially arranged resistive heating elements. The voltage and current sensing facility (6) is configured to provide sense signals indicative for a voltage and a current of the supplied electric power and the control unit (5) is configured to control a heat flux of each resistive heating element in response to the sense signals.

The utility model discloses a dot matrix thermal therapy system, which is characterized in that a 12MHZ frequency signal is generated by a 12MHZ active crystal oscillator, a 6MHZ frequency signal is realized through a D trigger by buying two frequency divisions, the 6MHZ signal achieves an output peak 6MHZ envelope signal by controlling LC resonance, and the final peak value can reach 200V; and according to the real work gear, the 18-60V output adjustable intelligent power supply gives signals through the MCU to obtain voltages of different gears. Meanwhile, human body resistance detection is added to the system, and output energy can be adjusted according to a real-time human body resistance detection value. The heating device can deeply heat dermis and subcutaneous tissues in a deep, uniform and volumetric manner. By heating the sublayer of the skin, this heat results in the production of collagen, referred to as new collagen production. The new collagen enables the skin to look more compact, and improves the overall texture of the skin.

The utility model relates to the technical field of heat treatment equipment, in particular to a long-size multi-zone box-type tempering furnace, at least two sets of heaters are arranged in a hearth, and heating elements of the heaters are hung in the hearth; each set of heater is provided with a circulating fan; an air blowing opening of the circulating fan faces a heating element of the heater, and an air suction opening of the circulating fan faces the direction, where parts are placed, in the hearth; a thermal induction temperature control system is further included, and an infrared thermal inductor is adopted as a sensor of the thermal induction temperature control system. A hollow high-temperature-resistant pipe is further arranged corresponding to the infrared heat sensor, one end of the high-temperature-resistant pipe is arranged outside the hearth, and the other end of the high-temperature-resistant pipe is arranged in the hearth. The infrared heat sensor is arranged in the part, outside the hearth, of the high-temperature-resistant pipe; a light-sensitive surface of the infrared heat sensor faces the other end of the high-temperature-resistant pipe; the high-standard heat treatment requirement of large-size parts is improved, and the infrared heat inductor is prevented from being damaged by high temperature.

The invention discloses an integrated inductor, and relates to the technical field of inductors, the integrated inductor comprises a circuit board body, an inductor assembly is fixedly mounted on the top surface of the circuit board body, the inductor assembly comprises two coil fixing frame assemblies, a coil assembly is mounted between the two coil fixing frame assemblies, and a magnetic core assembly is mounted on the inner wall of the coil assembly; the two coil fixing frame assemblies are fixedly provided with a temperature control trigger assembly and a heat exchange assembly respectively, the exterior of the heat exchange assembly is connected with a plurality of cooling assemblies, and the plurality of cooling assemblies are fixedly installed on the outer wall of the coil assembly. The thermal induction spring piece and the memory metal piece deform to trigger the linkage mechanism, so that the magnetic core assembly is automatically decoupled from the coil body, meanwhile, the partition plates are inserted into gaps of the coils to separate the coils to avoid heat accumulation, meanwhile, liquid coolants are pressed and fed into the magnetic core assembly to rapidly absorb heat, and the overheating protection capacity of the system is enhanced.

The present application relates to a kind of overheat protection type high temperature resistant cable applied in cable field, including high temperature resistant cable body and the high temperature resistant cable maintenance station matched with high temperature resistant cable body, using the cooperation of outer thermal induction cover, two-way spacer, inner thermal induction cover, trigger column and heat-resistant protection system, can produce trigger induction in time when the temperature of high temperature resistant cable body outside or inside suddenly changes, can protect the overheat of high temperature resistant cable body in time while playing the role of real-time monitoring, promote the application effect of outer liquid cooling layer and inner liquid cooling layer, promote its response timeliness to the temperature change inside and outside high temperature resistant cable body, reduce the damage of high temperature resistant cable body caused by overheat, while guaranteeing the service life of high temperature resistant cable body, promote the stability and safety of high temperature resistant cable body running in high temperature environment, and can be regulated by overheat factor to carry out targeted liquid cooling circulation, effectively reduce the loss of energy.

A lamp assembly includes an outer lens that is attachable to a vehicle structure and at least one heat inducing member that mounted to selected portions of the outer lens.

The invention relates to the technical field of metal material processing and heat treatment, and discloses an anti-seismic reinforcing steel bar and a production process thereof, and the production process comprises the following steps: carrying out surface instantaneous micro-quenching on a high-temperature reinforcing steel bar subjected to controlled rolling forming to form a martensite thin layer; then applying a high-frequency electromagnetic field for disturbance treatment; coating a layer of functional precursor powder on line; then in-situ tempering and surface alloying are achieved by applying on-line shear deformation; and finally, the whole steel bar is subjected to speed-controlled cooling so as to complete core structure phase change. According to the method, precise in-situ tempering is conducted on a quenched surface layer through plastic deformation heat induced by shear stress, a functional precursor is synchronously driven to react in situ to form an alloying modified layer, and the structure transformation condition is optimized under the assistance of electromagnetic disturbance; an integrated composite gradient structure with the core being ferrite-pearlite and the surface being tempered martensite and a functional modification layer is achieved, and the problems that according to a traditional technology, strength and toughness matching is difficult, and performance is unstable are solved.

The invention relates to heat treatment equipment and a heat treatment method for separating a roller shaft from a roller sleeve. The heat treatment equipment comprises a first machine base, a first lifting mechanism, an upper tip, a second machine base, a first mounting base, a bearing piece, a lower tip, a second lifting mechanism and a heating induction coil, a first through hole allowing the lower tip to pass through is formed in the first mounting seat, the lower tip is sleeved with the first mounting seat, a second through hole allowing the lower tip to pass through is formed in the bearing piece, the bearing piece is arranged on the first mounting seat, and the lower tip is sleeved with the bearing piece; the heating induction coil is used for heating the outer surface of the roller sleeve so that the roller sleeve can be separated from the roller shaft, and the bearing piece is used for bearing the falling roller sleeve. Different from the prior art, the roller shaft does not need to be damaged, the roller shaft and the roller sleeve can be reused, the machining period is short, meanwhile, a large amount of machining cost is saved, and the roller sleeve and the roller shaft can be rapidly separated.

The invention disclosed herein includes apparatus and a method for enhancing the evaporation rate of leachate from leachate evaporator ponds. The HIAP apparatus and method promotes enhances evaporation by providing heat from high powered industrial heat lamps that direct heated air and heat energy across the air / leachate liquid interface of the evaporator pond surface to increase the evaporation rate of leachate from the evaporator pond.

To efficiently transfer heat energy to a metal strip.SOLUTION: Rotating magnet heaters for metal products, such as aluminum strip, may include permanent magnet rotors positioned above and below a moving metal strip to induce a moving or time-varying magnetic field through the metal strip. The changing magnetic field may induce currents (e.g., eddy currents) in the metal strip, thus heating the metal strip. The magnetic rotor set can include a pair of aligned magnetic rotors on opposite sides of the metal strip that rotate at the same speed. Each magnetic rotor of a set can be positioned equidistant from the metal strip to avoid pulling the metal strip away from the passline. The downstream magnetic rotor set may be used in proximity to the upstream magnetic rotor set to offset the tension induced by the upstream magnetic rotor set.SELECTED DRAWING: Figure 1

The application discloses a kind of automatic spraying fire extinguishing explosion-proof automobile charging pile with aerosol material thermal induction, including thermal induction sensor and explosion-proof module, explosion-proof module is arranged in the inside of charging pile, thermal induction sensor meets certain high temperature and automatically triggers explosion-proof module, solid granular aerosol contained in the inside of explosion-proof module is rapidly converted into hot aerosol and is quickly sprayed, and is heated and decomposed reaction in the moment of meeting high temperature, generates a large amount of inert chemical cooling material, with smoke-like microparticle agent rapidly full-flooded fire extinguishing to the inside and outside of charging pile.

The invention discloses an intelligent network security switch heat dissipation device based on thermal induction, and the structure of the device comprises a switch main body, a lifting platform, a guide rail, a heat dissipation assembly, and a housing. When a temperature sensor of the lifting platform receives a signal that a switch main body generates a large amount of heat, the lifting platform drives the heat dissipation assembly to move up and down to a proper position on the guide rail, and then the fan structure is driven to slowly move left and right on the arc-shaped frame, so that the fan structure accelerates flowing of air in the shell, and the heat dissipation effect is improved. The heat is absorbed by means of the refrigerant, so that the working heat of the switch main body is taken away quickly, and the network switch is prevented from being damaged.