29results about How to "Fast heating rate" patented technology

The utility model relates to chemical synthetic technical field, concretely is a kind of production system of industrial grade ethylsilane, including the ethylsilane production unit, heat exchange unit, gas-liquid separation unit, ethylsilane temporary storage tank connected in turn;Ethylsilane production unit includes hydrogen preheater, methylsilane preheater, ethylsilane reactor, wherein, hydrogen preheater and methylsilane preheater one end are all provided with inlet pipe, and other end is all connected with ethylsilane reactor, and ethylsilane reactor is connected with heat exchange unit;Heat exchange unit is also connected with hydrogen circulation unit and methylsilane circulation unit.Hydrogen recovery recycling, after a period of time, the hydrogen generated in the reaction process can meet the operation required of ethylsilane production unit, stop external hydrogen supply;Methylsilane recovery recycling, save material, reduce consumption.

The present disclosure provides a high-temperature graphene electric heating plate capable of being used for traditional Chinese medicine moxibustion and a manufacturing method thereof. The high-temperature graphene electric heating plate utilizes the infrared rays generated by graphene at high temperature to cover the spectrum of moxa heat, adopts a high-temperature-resistant rigid substrate and a high-temperature-resistant protective layer to protect the high-temperature graphene electric heating film, and transfers graphene through an adhesive layer containing a dopant during preparation, thereby improving the transfer quality, high-temperature stability and yield of the graphene, and achieving the material requirements of traditional Chinese medicine moxibustion.

The application discloses a multi-branch heating pipe hot air assembly, which is mainly cylindrical, and is provided with a tapered narrowing air inlet end and an air outlet end at two ends of the main body; the main body comprises an aluminum heat dissipation cylindrical shell provided with inward fins; the cylindrical shell is inwardly and sequentially nested with an aluminum cylindrical heat transfer main body and an aluminum inner core heat dissipation cylinder with the fins of the heat transfer main body outward; a plurality of through holes are uniformly distributed on the heat transfer main body in the axial direction, and a heating pipe not in contact with the heat transfer main body is arranged in the through hole; an outer wall air duct is arranged between the cylindrical shell and the heat transfer main body and is communicated with the air inlet end and the air outlet end; the heating pipe is communicated with the air inlet end and the air outlet end to form an inner core air duct; a heat transfer main body center air duct is arranged between the heat transfer main body and the inner core heat dissipation cylinder and is communicated with the air inlet end and the air outlet end; and the heat transfer main body and the heating pipe are fixed with the air inlet end and the air outlet end through fixing members located at two ends. The equipment has the characteristics of precise temperature control, high-temperature dry burning protection, good sealing performance, high energy efficiency, fast heating rate and high heat exchange efficiency.

The utility model provides two-stage sterilization equipment for bagged acidic drinks. The equipment comprises a feeding module, an enhanced heat transfer sterilization module and a cooling module which are connected in sequence, the enhanced heat transfer sterilization module comprises a fluid oscillation treatment section, a rapid heating section and a heating maintaining section; the fluid oscillation treatment section comprises a first chamber for accommodating raw materials to be treated and an oscillation element for driving the first chamber to generate mechanical oscillation with preset frequency and amplitude; the rapid heating section comprises a first heat exchange pipe and a first heating channel, the inner wall of the first heat exchange pipe is in a specific geometrical shape, and the specific geometrical shape comprises a continuous corrugated structure extending in the axial direction of the first heat exchange pipe, a spiral groove-shaped structure formed along the inner wall of the first heat exchange pipe and a static mixing structure fixedly arranged in the first heat exchange pipe. And a higher heating rate and more uniform temperature distribution can be realized in the rapid heating section, so that thermosensitive components in the natural acid beverage can be better protected while the sterilization effect is ensured, and the product quality is improved.

The application belongs to the technical field of battery preheating, and particularly relates to a fast-response in-situ temperature control binder as well as a preparation method and application thereof. The application proposes a new binder, which uses hyperbranched polymers carrying a large number of charges to load fast-response particles through electrostatic interaction and redox reaction, and designs an external miniature heating device cooperating with the fast-response binder, so that the impedance of the battery is not increased, and the effect of non-contact fast heating of the battery interior can be achieved only by using the binder when assembling the battery and cooperating with the external device. The battery can be raised from minus 60 degrees Celsius to room temperature in 5 seconds, and the battery in hibernation due to low temperature can be quickly woken up to discharge and work again. The application has great significance for the field of battery low-temperature preheating, and provides a brand-new heating strategy, which creates an unprecedented new idea for the use of the battery at low temperature.

A system and method for reducing sulfur dioxide-containing gas by a binary method. The system for reducing sulfur dioxide-containing gas by a binary method includes a gasifier, which is used for performing a gasification reaction of a carbon-based solid fuel and a gasifying agent, and is used for reducing SO2 in the sulfur dioxide-containing gas by a binary method using the coal gas and semicoke generated by the gasification reaction. The present invention innovatively uses the gasifier as a reduction reactor for sulfur dioxide-containing gas, and uses the two binary products, namely semicoke and coal gas, generated by gasifying the carbon-based fuel in the gasifier to perform binary reduction of SO2 in the sulfur dioxide-containing gas, strengthening the reduction effect and improving the SO2 conversion rate.

The invention discloses a ceramic bearing device for thin glass processing and a ceramic supporting strip preparation method, the ceramic bearing device for thin glass processing comprises a plurality of ceramic supporting strips and a supporting frame, the ceramic supporting strips are vertically arranged, and the plurality of ceramic supporting strips are arranged in parallel; the ceramic supporting strip comprises a continuous ceramic line, and the diameter of the ceramic line is 1-2 mm. The ceramic line is provided with a plurality of first arc-shaped ceramic line segments, every two adjacent first arc-shaped ceramic line segments are connected through a connecting part, and each connecting part comprises a horizontal ceramic line segment or a second arc-shaped ceramic line segment. The first arc-shaped ceramic line segment is of an arc-shaped structure; the arc-shaped ceramic line segment is of an arc-shaped structure; the ceramic support strip is prepared by integral forming; the prepared ultra-thin glass bearing device is resistant to acid and alkali corrosion and stable at high temperature, and the supporting strips used for bearing ultra-thin glass are integrally formed and long in service life.

This invention belongs to the field of automotive interior material testing technology and discloses a VOC release detection device for automotive interior materials. The device includes: a rotating support frame; a detection chamber assembly rotatably mounted on the rotating support frame, the detection chamber assembly including a main housing and a sealing cover mechanism, which cooperate to form a sealed detection chamber; and a suspension clamping assembly disposed within the detection chamber for clamping the sheet-like test material and physically dividing the detection chamber into a first chamber and a second chamber. This invention constructs a breathing circulation system through an oil-free pump suction mechanism combined with a bellows buffer mechanism, driving gas to reciprocate through the test material. Combined with a rotating inverted structure, gravity is used to accumulate the excitation medium on the material surface. Under the action of alternating airflow, cyclic excitation of fluidized suspension and compaction contact is generated, thereby effectively destroying the gas boundary layer under microscopic hammering and friction, significantly improving the deep VOC desorption rate and detection accuracy.

The electronic cigarette atomizing core and the electronic cigarette provided by the embodiments of the present application comprise a porous body and a heating body, the porous body comprises a liquid absorbing end and an atomizing end, the atomizing end is provided with a protrusion, the protrusion has an end face away from the porous body and a side face located at the outer periphery of the protrusion, the heating body is arranged on the end face, and the distance between at least part of the heating body and the edge of the end face is less than a predetermined value, so that at least part of the end face and at least part of the side face form atomizing surfaces. In this way, when the atomizing surfaces formed by the protrusion are fully utilized, the utilization efficiency of the heat energy of the heating body can be ensured on the basis of improving the heating rate of the heating body.

This invention relates to a hot press head and hot press equipment, belonging to the technical field of hot press equipment. It includes a base, a heat insulation block, a heating element, a support member, a first heat dissipation hole, and a pipe connector. The heat insulation block is disposed on the base, and the heating element is disposed on the side of the heat insulation block facing away from the heating element. The support member is disposed between the heating element and the heat insulation block, supporting the heating element on the heat insulation block. The gap between the heating element and the heat insulation block forms a heat dissipation cavity. The first heat dissipation hole is disposed on the heat insulation block, with one end communicating with the heat dissipation cavity. The pipe connector is disposed on the heat insulation block or the base, for sequentially delivering heat dissipation airflow to the first heat dissipation hole and the heat dissipation cavity. This invention significantly reduces the direct contact area between the heating element and the heat insulation block, reduces heat conduction, increases the heating rate of the heating element, and significantly improves heat dissipation efficiency and uniformity.

The application belongs to the field of ceramic powder preparation, and discloses a method for in-situ preparation of high-performance TiB2-B4C composite ceramic from sapphire fine grinding waste. The method uses the waste produced in the sapphire grinding process as raw material (B4C, Al2O3 and Fe), adds TiO2 and C after alkali washing and purification, and combines with the discharge plasma sintering to in-situ prepare TiB2-B4C composite ceramic. The method not only realizes the comprehensive recovery of B4C in the sapphire fine grinding waste slurry, reduces environmental pollution, but also provides a method for in-situ preparation of TiB2-B4C composite ceramic from waste, changes waste into treasure, and realizes the secondary use of resources. In addition, the raw material cost is low, and the method has obvious economic value and environmental protection significance. The method has the advantages of short process, small pollution, simplicity and the like, and can be used for industrial production.

The utility model discloses a screw assembly and a double-screw extruder for a reactive melt-blowing process, the screw assembly comprises two screws which have the same structure, rotate in the same direction and are meshed with each other, and each screw consists of a mandrel and a thread element; one end of the core shaft is a feeding end, the other end of the core shaft is a discharging end, and the core shaft can rotate under the action of external force; the threaded element is arranged on the mandrel in a sleeving mode and can rotate along with the mandrel. The screw assembly comprises a feeding section, a reaction section and an extrusion section which are connected in sequence, and the types, the leads and the lengths of internal thread elements in all the sections are reasonably arranged; therefore, conveying of low-viscosity raw materials, initiation of polymerization reaction, macromolecule growth and mixing, conveying and extrusion of high-viscosity polymerization products can be rapidly achieved in a continuous process, and a continuous polymer melt which is stable in pressure, constant in flow and easy to draw and thin is provided for a subsequent spinning assembly.

The application relates to the technical field of clothes dryers, and provides a clothes dryer heat pump system and a clothes dryer. The clothes dryer heat pump system comprises a compressor, a condenser, a phase-change cold accumulator and an evaporator which are sequentially arranged. The first branch and the second branch are connected in parallel at the outlet of the condenser (the first branch and the second branch are connected with the phase-change cold accumulator and the evaporator respectively), and a switching device is arranged, so that flexible control of the operation mode is realized. In the initial temperature rising stage, the system controls the switching device to turn on the first branch and turn off the second branch. The refrigerant flows through the phase-change cold accumulator, the heat exchanger in the box absorbs the heat of the refrigerant (evaporates and absorbs heat), and the cold energy is stored in the phase-change material. Since the evaporator does not work at this time, the system will not output cold air to the drum, so that the sensible heat loss caused by air cooling is avoided. This strategy directly improves the temperature rising rate in the initial stage, thereby shortens the overall drying time, and realizes energy saving and consumption reduction.

The invention relates to the technical field of welding, and discloses a vacuum welding furnace and a welding method thereof. The vacuum reflow soldering furnace comprises a vacuum furnace; a hollow tray and a heating part are arranged in the vacuum furnace, and the hollow tray is provided with a hollow part for bearing a substrate to be welded; the heating part is located on the side, different from the to-be-welded substrate, of the hollowed-out tray and used for heating the to-be-welded substrate through the hollowed-out part. The welding efficiency of the vacuum reflow welding furnace is high.

The utility model relates to a double-layer asphalt melting device with side feeding, belongs to the technical field of asphalt melting equipment, and aims to solve the problems that an existing asphalt melting device is high in operation cost, large in occupied space after synergistic improvement and poor in economical efficiency, the double-layer asphalt melting device comprises a shell and two heat conduction oil pipe heating units, the shell is divided into an upper layer area and a lower layer area, the upper layer area and the lower layer area are communicated, the two heat conduction oil pipe heating units are arranged in the upper layer area and the lower layer area in the shell respectively, a plurality of feeding ports are machined in the front side wall of each area, and a sealing door is correspondingly arranged at each feeding port. The sealing door structure located on the upper layer completes opening and closing actions in a pneumatic upturning mode, and the sealing door structure located on the lower layer completes opening and closing actions in a manual mode. The device is mainly used for melting asphalt blocks in the asphalt production process.

The application belongs to the technical field of inorganic nonmetallic materials, and relates to a high-thermal-conductivity spark plasma sintering silicon carbide ceramic material and a preparation method thereof. The application discloses a high-thermal-conductivity spark plasma sintering silicon carbide ceramic material, and raw materials of the high-thermal-conductivity spark plasma sintering silicon carbide ceramic material, according to mass percentage, include 85-98 wt.% of submicron silicon carbide powder, 0.01-2 wt.% of micron silicon carbide powder, 1-10 wt.% of rare earth oxide, 0.5-3 wt.% of magnesium oxide, 0.01-2 wt.% of carbon and 0.5-2 wt.% of dispersant. The application further discloses a preparation method of the high-thermal-conductivity spark plasma sintering silicon carbide ceramic material. The application adds magnesium oxide as a second sintering aid on the basis of a raw material system taking submicron silicon carbide powder as raw material and rare earth oxide as a sintering aid, significantly reduces the eutectic point and viscosity of a liquid phase, can effectively promote the mass transfer efficiency in the sintering process, improves the densification and grain growth efficiency, and thus improves the thermal conductivity of the SiC ceramic.

The utility model relates to the technical field of joule heat high temperature synthesis equipment discloses a rotatable joule heating device, include: the two sides inner wall of heating bin are connected with the clamping piece opposite rotation, and the pivot of one clamping piece is worn out heating bin, reaction pipe is arranged in the heating bin, and the both ends of reaction pipe are respectively clamped on two clamping pieces, and carbonaceous heating carrier is equipped in reaction pipe, and carbonaceous heating carrier is used for under the action of electric current instantaneous heat generation to heat the material in reaction pipe, the output shaft of rotary drive part is equipped with magnetic coupler, and magnetic coupler is connected with the pivot of clamping piece worn out heating bin, is used for driving reaction pipe to rotate through clamping piece, this device can overcome the defect that traditional heater heating rate is low, heating time is long and limit temperature is not high, can help high temperature synthesis material even in the heating test process is heated, and better control synthesis material's collective appearance, prevent the problem that synthesis material appearance is uneven.

The invention relates to a starting method of a fuel cell system and a vehicle with the fuel cell system. Comprising the following steps: in response to a starting instruction, acquiring the temperature of a cooling liquid outlet of a galvanic pile, heating the galvanic pile through a cooling liquid loop when the temperature is lower than a preset temperature, controlling a hydrogen loop and an oxygen loop of the fuel cell system to be in corresponding working states, and controlling a second output end and an air bypass valve to be in an open state, the first output end and the third output end are in a closed state, one end of the air bypass valve is connected with the output end of the intercooler, and the other end of the air bypass valve is connected with the oxygen output end of the electric pile; and obtaining the temperature of the output end of the air compression assembly and the hydrogen outlet temperature of the electric pile, and controlling the fuel cell system to start according to the temperature of the output end of the air compression assembly and the hydrogen outlet temperature. Therefore, the problems that in the prior art, the heating efficiency is low, the energy loss is large, the local temperature difference is too large, and cooperative regulation and control over the hydrogen and the air side are lacked are solved, and the safe, rapid and energy-saving cold start process is achieved.

This utility model provides a water heater for a travel vehicle, comprising: a protective shell (11), a base plate (12), and a protective shell cover (13) forming an outer cover (1) with a hollow cavity. The base plate (12) is located at the bottom of the protective shell (11), and the protective shell cover (13) is located at the top of the protective shell (11). A furnace cover (2) and a water tank (3) are sequentially arranged between the base plate (12) and the protective shell cover (13) within the hollow cavity of the outer cover (1). Multiple arc-shaped tubes (31) are arranged inside the water tank (3). The air inlet end (311) and the air outlet end (312) of each arc-shaped tube (31) are welded and fixed to the bottom of the curved surface of the water tank (3). The air inlet end (311) is fitted inside the furnace cover (2), and the air outlet end (312) is fitted outside the furnace cover (2). This utility model can effectively solve the problem of inconvenience in selecting the opening position and cutting the opening process when installing a water heater.

The utility model relates to PCR plate technical field especially relates to a 96 hole PCR plate, including the plate body, the plate body evenly is provided with several reaction tubes, the hole wall thickness of reaction tube is linearly reduced along the radial distance from the center to the periphery, the hole wall of reaction tube includes plastic base body, heat conducting metal foil, insulating layer, the hole wall thickness is linearly reduced along the radial distance from the center to the periphery, can effectively reduce the thermal resistance, the reaction tube of periphery can be in contact with the heat source completely, reduces the thermal loss and appears the edge effect, and the heat conducting metal foil is inbedded in the reaction tube, and the plastic base body is combined and conducts heat, and the heat conducting metal foil does not contact with the reaction liquid directly, avoids the influence PCR reaction, can effectively improve the heat conducting performance of plastic base body simultaneously, and the heating rate is fast, effectively solves the heat loss difference, reduces the biological pollution risk.

The application discloses a kind of alginate-based high-entropy metal oxides and preparation method and application thereof, belong to gas sensor material technical field.The application uses the high-entropy metal salt solution of at least five kinds of metal sources and alginate solution is mixed, and alginate-based high-entropy metal aerogel is prepared, and then carbon cloth is wrapped, and nanometer sheet-shaped alginate-based high-entropy metal oxide is obtained by using Joule heating method rapid heating.The material can be used for high-sensitivity detection of ethanol gas.The preparation method in the application is green, simple, fast, has good sensing response effect in ethanol gas detection, and the sensing material has good stability, can be recycled multiple times, and has good application prospect.

The utility model discloses a kind of adiabatic accelerating calorimeters, it is related to battery thermal runaway testing instrument field, including upper cover and main body, main body includes main body inner container and the main body shell wrapped in the outer side of main body inner container;Upper cover is located in the upper of main body, for sealing main body inner container;When upper cover and main body inner container mutually fit together, upper cover and main body inner container inside form adiabatic calorimeter cavity;Main body inner container includes the first accommodating portion that left and right direction is same in longitudinal section, and the second accommodating portion located at the both ends of first accommodating portion, second accommodating portion has arc inner wall;Main body or upper cover is also provided with first interface group, second interface group, electrode column group, lighting hole group, camera hole group, temperature measuring mouth group and liquid nitrogen mouth group.Adopting the utility model, battery heat release state can be heated quickly and tracked, structure is reasonable, space utilization is high, easy to operate.

This utility model relates to pectin extraction using ohmic heating technology and automated control technology, belonging to the field of food processing and automation control. Specifically, it is a pectin extraction device based on ohmic heating, which includes a reaction device, a storage and collection device, a pipeline conveying device, auxiliary devices such as pressure gauges and coolers, as well as software programs and hardware circuits. This utility model has a compact structure and simple operation. Through the rational design of the reaction vessel, ohmic heating technology can be applied and the stirring requirements of the processing can be met, realizing the automation of the pectin extraction process. It can precisely control the heating rate and temperature during the pectin extraction process, and can uniformly heat the material in a shorter time, achieving low energy consumption, high efficiency, intelligence, and green energy saving.

The invention discloses a method for efficiently preparing black phosphorus crystals, a vertical reactor is divided into a top part and a bottom part, the bottom of the reactor is a raw material end, the top of the reactor is a nucleation end, and a composite high-thermal-conductivity material is placed at the raw material end; the preparation method of the composite high-thermal-conductivity material comprises the following steps: carrying out acidic and alkaline treatment on high-thermal-conductivity powder, and then washing with water to obtain dried high-thermal-conductivity powder; copper powder, aluminum powder and the dried high-thermal-conductivity powder are mixed, and a mixed material is obtained; and putting the composite material into an organic solvent, performing thermal degreasing, performing degreasing, and finally performing vacuum sintering to obtain the composite high-thermal-conductivity material. Adding a phosphorus source, a catalyst and a transport agent into a raw material end of the reactor in an inert gas atmosphere; after the reactor is sealed, the black phosphorus crystal is prepared by controlling the temperature of the raw material end and the nucleation end. The invention can solve the problems of poor heat transfer effect, unsuitability for large-scale preparation of black phosphorus crystals, unstable quality and the like after the phosphorus source is discharged.

This invention relates to a high-density, high-strength, and ductile TaNbZr multiphase alloy and its preparation method, belonging to the field of alloy technology. The alloy consists of a Ta phase, a TaNb solid solution phase, and a NbZr solid solution phase. Through multiphase structure design, high density, high strength, and good ductility are synergistically optimized. The preparation method employs a powder metallurgy process of stepwise ball milling and pressure-driven rapid sintering. First, stepwise ball milling disperses excess Ta into different phases, reducing the modulus mismatch caused by Ta and avoiding the formation of brittle phases such as TaZr. Second, pressure-driven rapid sintering achieves good material density, and increasing the heating rate and shortening the holding time reduces elemental diffusion. Finally, a refractory high-entropy TaNbZr alloy with excellent mechanical properties is obtained.

The invention discloses a battery heating system, method and device, electronic equipment and a computer program product, and relates to the technical field of electric automobiles. The method comprises the following steps: under the condition that a battery is in a charging state, detecting a battery temperature at the position of the battery; under the condition that the battery temperature is smaller than a first temperature threshold value, a locked-rotor heating mode of the motor is started, and the motor temperature at the position of the motor is detected; under the condition that the motor temperature is larger than a second temperature threshold value, a preset valve in the heat circulation pipeline is adjusted to be in a second state from a first state, under the condition of the first state, the heat transfer medium circulates independently in the first heat circulation pipeline and the second heat circulation pipeline, and under the condition of the second state, the heat transfer medium circulates independently in the first heat circulation pipeline and the second heat circulation pipeline. And the heat transfer medium circulates in a pipeline formed by the first heat circulation pipeline and the second heat circulation pipeline. According to the invention, the technical problems of invalid absorption of PTC heat and slow battery temperature rise caused by too low initial temperature of the motor in a low-temperature environment are solved.

The invention relates to the technical field of chromatographic analysis, and discloses a chromatographic instrument rapid heating method and system, an intelligent terminal and a storage medium, and the method comprises the following steps: applying a high-frequency alternating current to a peripheral electromagnetic coil of a chromatographic column, and generating heating power by virtue of an eddy current; carrying out forced heat exchange on the carrier gas and the outer surface of the chromatographic column to form a convective heat exchange field; the heating power generates temperature gradient to excite the thermoelectric effect of the metal tube wall to generate thermoelectric electromotive force; inverting the current average temperature and temperature difference trend based on the calibration relation, and cooperatively regulating the current and the carrier gas flow to construct a composite thermal field; when the current average temperature reaches the preset target temperature and the temperature difference trend information shows that the temperature distribution tends to be steady, switching the regulation and control parameters of the high-frequency alternating current and the preheated carrier gas to a steady-state maintenance mode, and enabling the chromatographic column to enter a constant-temperature control stage; according to the invention, the rapid heating efficiency of the chromatograph can be improved.

The application discloses a kind of melt crystallization devices, comprising: kettle top is provided with a cover, cover central installation has a pipe body, kettle outer wall is provided with jacket, jacket is communicated with first water inlet pipe and first water outlet pipe, first water inlet pipe is communicated with cold water tank, first water inlet pipe side wall is communicated with branch pipe, branch pipe is communicated with hot water tank, pipe cover top is communicated with second water inlet pipe and second water outlet pipe, second water inlet pipe is communicated with hot water tank, kettle bottom is wound with heating wire, kettle inside additional central pipe body and outside jacket form double heat exchange passage body, in the process of original liquid crystallization, cold water is passed into jacket while ice block is placed in pipe body, increase heat exchange area, improve cooling rate, so that original liquid quickly reaches supersaturated state, promote crystal high-efficiency precipitation, in crystal melting stage, hot water is passed into jacket and pipe body, while starting heating wire auxiliary heating, double heating mode accelerates the heating rate, so that crystal quickly melts, improve efficiency, shorten production cycle.

The test tube heating rack comprises a test tube rack assembly and a base assembly, the test tube rack assembly comprises a body, a plurality of test tube grooves and a heating assembly used for heating test tubes arranged in the test tube grooves, the heating assembly comprises a heating circuit and a heating component, the heating component is detachably connected with the body, and the heating circuit is connected with the base assembly. The heating component comprises a heating part and a fixing part, the heating part comprises a plurality of heating pieces, and the heating pieces are distributed at all positions of the body; the heating sheets are separated from one another and extend in the axial direction of the test tube groove. According to the test tube heating rack disclosed by the utility model, the test tube is rapidly heated by utilizing the heating component detachably connected with the body, and the heating sheets are arranged along the axial direction of the test tube groove and are arranged at multiple positions of the body, so that the whole body is uniformly heated while the heating rate is accelerated; the body is uniformly heated, that is, the test tube grooves are uniformly heated, and the structure that the fixing part is matched with the fixing block enables the heating component and the body to be mounted more conveniently.