29results about How to "Melting fast" patented technology

The utility model discloses a kind of general carriers suitable for a variety of special-shaped PCB mounting, belong to PCB mounting carrier technical field, including shell, the inside fixed connection of shell has carrier plate, by the carrier plate in shell forms storage space, phase-change medium is placed in the storage space;Through the solid-liquid phase change characteristic of phase-change medium, temperature control is carried out with heating coil, can make supporting component with PCB shape dynamic adjustment deployment position and height, after melting, phase-change medium allows supporting component free displacement, after cooling solidification forms stable support structure, can perfectly adapt to different curvature, concave-convex structure special-shaped PCB, solve the problem that magnetic attraction is not stable, easily affect production, the control mechanism set with heating and cooling two modes, phase-change medium can be quickly melted by heating coil, then cooling water circulation is driven by miniature pump body, can be quickly completed medium solidification, simple and convenient to use, and adjustment speed is fast.

The utility model relates to the technical field of hot melt adhesive coating and laminating, and discloses a hot melt adhesive coating and laminating machine which comprises a baffle, a connecting plate and a shell, lifting assemblies are arranged at the two ends of the connecting plate, a cover plate is arranged at the end of the shell, buckle assemblies are arranged at the two ends of the cover plate, and a heating assembly is arranged at the bottom of the shell. A left-right moving assembly is arranged on the side face of the connecting plate, and a conveying assembly is arranged on the inner side of the baffle. The buckle assembly comprises an L-shaped block, the end of the L-shaped block is rotationally connected to the inner side of the cover plate, and two second fixing blocks are fixedly connected to the side face of the shell. According to the utility model, through the matching design of the elliptical clamping blocks and the L-shaped blocks, the cover plate can be firmly fixed, the cover plate is ensured not to loosen in the operation process of equipment, and the stability and the safety of the equipment are ensured. And the heating wire assemblies at the two ends of the heating box are used for heating the glue outlet pipe, so that the hot melt glue stick can be uniformly heated and quickly melted.

The invention belongs to the field of metal additive manufacturing, and relates to a preparation method of a formed test block containing prefabricated micropores, which comprises the following steps: 1) obtaining an initial base material sample containing a flat and smooth surface; (2) forming spherical holes in the flat and smooth surface of the initial base material sample in a machining manner; 3) filling the spherical holes with a sublimable material, and curing the sublimable material in the spherical holes; 4) sealing the spherical hole filled with the sublimable material to obtain a base material sample after hole sealing; and (5) continuously forming on the base material sample after hole sealing until a formed test block containing the prefabricated micropores is formed. The invention provides the preparation method of the formed test block containing the prefabricated micropores, which can be compatible with metal additive manufacturing process characteristics and can be used for accurately prefabricating the controllable pores.

The utility model provides a battery device, a power utilization device and a connecting piece. The battery device comprises a plate assembly, a mounting structure, a battery monomer and the connecting piece, the plate assembly is provided with a through fixing through hole. At least part of the mounting structure is located on the side, in the penetrating direction of the fixing through hole, of the fixing through hole, and at least part of the mounting structure and the plate assembly jointly define a mounting space. And at least part of the battery monomers are positioned in the mounting space. The connecting piece comprises a first face and a second face, a part of the connecting piece penetrates through the fixing through hole so that the first face and the installation structure can be fixed in a friction welding mode, a part of the plate assembly is located between the installation structure and the second face, and the second face and the plate assembly are fixed in a friction welding mode. According to the battery device provided by the embodiment of the invention, fixing structures such as threads do not need to be prepared on the mounting structure and the connecting piece in advance, and the structures of the mounting structure and the connecting piece do not need to be damaged in the mounting process, so that stress concentration is reduced.

The present application relates to a kind of dual-mode heat conduction freeze-thaw system and freeze-thaw method, freeze-thaw system includes freeze-thaw cabin, at least two heat exchange plates are provided in cabin body, for placing bagged biological products between two adjacent heat exchange plates;Circulating medium system, including medium temperature control equipment and medium circulation pipe, medium temperature control equipment is used to provide liquid circulating medium and control the temperature of liquid circulating medium, medium temperature control equipment is connected with all heat exchange plates by medium circulation pipe;Air flow circulation system, including air flow circulation pipe, air flow circulation pipe is communicated with the both ends of the cabin body of freeze-thaw cabin and forms air flow circulation channel, air flow circulation driving device and air flow temperature control device are arranged in air flow circulation channel.The present application improves the thawing efficiency by the dual-mode heat conduction of direct contact heat conduction and air flow heat transfer, can restore sample from frozen state to liquid state in short time, reduce the influence of thawing process on biological product quality.

The invention discloses a continuous purification device for high-purity indium, and relates to the technical field of high-purity indium processing. The device comprises a purification furnace, a feeding assembly is arranged on one side of the purification furnace and comprises a feeding box fixedly connected to one side of the purification furnace, first hydraulic cylinders are fixedly connected to the front end and the rear end of one side of the top of the feeding box correspondingly, and output shafts of the first hydraulic cylinders extend into the feeding box and are fixedly connected with a lifting plate; and extrusion rollers are rotationally connected to the two sides of the lower surface of the lifting plate and located at a feeding opening of the feeding box, a plurality of feeding rollers are rotationally connected to the lower portion of the interior of the feeding box at equal intervals, and an auxiliary heating assembly is arranged below the purification furnace. Indium raw materials are extruded and heated through the feeding box, the extrusion roller, the feeding roller and the air inlet pipe, the problem that the indium raw materials are inconvenient to heat and melt in the prior art is solved, the molten indium raw materials are uniformly heated through the steam box, the steam pipe, the baffle and the flow guide plate, and the problem that the existing vacuum distillation speed is low is solved.

The application discloses a kind of lavender preparation of degradable 3D wire and related equipment, it is related to 3D wire preparation technical field.The frame is rotatably connected with main rod in the inner wall of the frame, and the frame is rotatably connected with the main rod in one end of the frame, and the frame is rotatably connected with the main rod in one end of the frame, and the frame is rotatably connected with the main rod in one end of the frame, and the frame is rotatably connected with the main rod in one end of the frame, and the frame is rotatably connected with the main rod in one end of the frame, and the frame is rotatably connected with the main rod in one end of the frame, and the frame is rotatably connected with the main rod in one end of the frame, and the frame is rotably connected with the main rod in one end of the frame, and the frame is rotably connected in the inside of the frame with folding stirring device.The application is provided with folding stirring device and partition device, and the frame is divided into at least three chambers by partition device, and folding assembly is arranged in stirring melting chamber and vacuum chamber, and folding assembly is stirred to mixture, so that mixture is quickly melted, while stirring mixture in vacuum chamber, and volatile components in molten mixture produce gas, vacuum pump can quickly suck out gas in molten mixture, so that gas in molten mixture can be quickly removed, to ensure the quality of wire after forming.

The utility model relates to a chemical industry mechanical equipment field especially, relates to a kind of ester exchange equipment for vegetable oil-based emulsifier production, including tank body, the tank body top is equipped with feed inlet, tank body bottom is equipped with discharge gate, the temperature regulating system is arranged in the tank body;The tank body top is installed with stirring motor, the output shaft of stirring motor is connected with stirring shaft, the stirring shaft is provided with stirring vane, the stirring vane includes the helical stirring vane of top layer, the stirring vane of pulp of middle layer and the anchor stirring vane located in bottom layer;The temperature regulating system includes high temperature layer located at the tank body top, constant temperature layer located at the tank body middle and cooling layer located at the tank body bottom.The ester exchange equipment of the application can reduce the adhesion of material to the inner wall of equipment and stirring device during production, thereby improving the uniformity of material distribution, reaction conversion rate and the quality of final product.

The application provides a smelting method of molten steel with scrap steel in a separate ladle, which breaks through the limitation of the scrap steel adding amount in the traditional process through the operation of adding scrap steel in multiple batches in a main refining furnace and adding scrap steel in the main refining furnace and an auxiliary refining furnace after the separate ladle operation. The multiple batch operation of the main refining furnace and the arrangement of at least two furnace bodies provide more opportunities and space for the scrap steel adding; the separate ladle operation further increases the number of molten steel ladles, greatly increases the total amount of scrap steel, effectively improves the scrap steel utilization rate, and reduces the molten iron consumption.

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.

This utility model relates to the field of injection molding equipment technology and discloses a high-flowability plastic injection molding machine, including an injection tube. A hopper is fixedly installed on one side of the top surface of the injection tube. Cavities are opened on both sides of the inner wall of the hopper. A melting component is fixedly installed inside the cavity. A filter screen is fixedly installed at the bottom of the inner wall of the hopper. A hopper cover is snapped onto the top surface of the hopper. This high-flowability plastic injection molding machine, through the arrangement of a crushing mechanism, a melting component, and a heat preservation component, allows plastic raw materials to be fed into the hopper. An electric heating grid heats and melts the raw materials after being energized. A servo motor drives a crushing rod to rotate, rapidly crushing the raw materials for faster melting. The filter screen filters out impurities to avoid affecting product quality. The molten plastic flows into the injection tube, where an electric heating plate heats and insulates the tube. Rock wool and polyurethane sleeves provide insulation, reducing heat loss, ensuring the flowability of the molten plastic, and preventing solidification.

The invention discloses a high-heat-capacity and low-corrosivity carbonate molten salt heat transfer and storage medium, a method and application, and belongs to the technical field of molten salt heat storage. The high-heat-capacity and low-corrosivity carbonate molten salt heat transfer and storage medium is prepared from K2CO3, Li2CO3, Na2CO3, AlCl3 and Al powder in percentage by mass, the Al powder and the AlCl3 powder are introduced into carbonate molten salt, the application target that the heat storage performance is excellent at the temperature of 600-850 DEG C can be achieved, and the heat transfer and storage efficiency of the carbonate molten salt is improved. And meanwhile, [Al] with considerable activity is generated by virtue of potential regulation capability of dissolved metal ions and gaseous chloride products by virtue of physical adsorption and chemical adsorption acting forces, so that the aim of reducing corrosion is fulfilled. The high-heat-capacity and low-corrosivity carbonate molten salt heat transfer and storage medium disclosed by the invention realizes the application goals of excellent heat storage performance and low corrosivity, is high in stability, simple in preparation process and easy for large-scale production, and can be applied to photo-thermal power generation and molten salt energy storage.

The utility model discloses a defrosting device of an air source heat pump, which relates to the technical field of air source heat pumps and comprises an air source heat pump main body, a connecting frame is arranged at the side end of the air source heat pump main body, an evaporator is connected in the connecting frame, a defrosting mechanism is arranged at the side end of the air source heat pump main body, and the defrosting mechanism comprises a defrosting box, a defrosting air inlet and a defrosting air outlet. The defrosting box is connected to the lower end of the connecting frame, the partition plate is connected to the interior of the defrosting box and vertically divides the defrosting box into a heating channel and an air guide channel, the heating channel communicates with the lower end of the air guide channel, and the moving frame is slidably connected into the connecting frame. According to the air source heat pump, the air source heat pump main body can be kept to work continuously while the evaporator is defrosted, although the air source heat pump can influence the heating efficiency of the air source heat pump, compared with the traditional situation that heating cannot be conducted during reverse circulation defrosting and heat pump demisting, the air source heat pump has the advantages that the influence is small, and the indoor temperature cannot fluctuate greatly.

The utility model discloses an intelligent vacuum cup. The cup comprises a cup body, a stirring structure is rotatably arranged at the bottom end in the cup body, a base is arranged at the bottom of the cup body, a control switch is arranged on one side of the outer surface of the base, a storage battery is arranged at the bottom end in the base, and a partition plate is arranged in the middle of the interior of the base. And motors are arranged on the two sides of the top of the partition plate, first conical teeth are arranged at the output ends of the motors, and second conical teeth are rotationally arranged in the middle of the top of the partition plate. According to the utility model, the motor, the first bevel gear, the second bevel gear, the transmission shaft, the connecting piece and the stirring structure in the base are matched, so that powder such as coffee and the like can be quickly melted, the problem of powder accumulation is solved, the cup cover, the base and the cup body can be detached, and when electronic elements in the cup cover and the base fail, the cup cover can be detached. And a user can conveniently maintain or replace electronic elements in the cup cover and the base.

This application proposes an energy-saving method for enhanced smelting of iron-based minerals. The method includes introducing a first reducing agent, fuel, and oxygen-enriched gas into a jet melting zone to melt the added iron-based minerals and flux. The molten slag undergoes partial pre-reduction. Weakly reducing flue gas is extracted and subjected to waste heat recovery and purification treatment to obtain flue gas and dust, with the dust returned to the jet melting zone. The molten slag enters the jet reduction zone, where a second reducing agent is added, and fuel and oxygen-enriched gas are submerged and injected to perform initial reduction, producing molten iron, iron-containing slag, and strongly reducing flue gas. The strongly reducing flue gas is treated to obtain CO gas and dust containing valence metals. The CO gas is pressurized and then introduced into the jet melting zone. This method can effectively process iron-containing minerals and low-sulfur iron-containing slag, and features efficient iron reduction and efficient energy recycling.

The application discloses a seat accessory injection molding device, which comprises a heating cylinder and a heat insulation cylinder nested on the heating cylinder, a plurality of support frames are fixed to the bottom of the heating cylinder, a servo motor is fixed to the top of the support frame, a driving cylinder is fixed to the top of the servo motor through a support rod, a feeding cylinder is fixed to the top of the heating cylinder, a fixed bearing is nested at one end of the heating cylinder, a piston pipe is fixedly arranged in the middle of the fixed bearing, a piston block is movably sleeved on the inner wall of the piston pipe, a plurality of positive screws are fixed to the surface of the piston pipe, a plurality of reverse screws are fixed to the surface of the piston pipe, a heating pipe is fixed to the inner wall of the heating cylinder, and a discharging end is integrally formed at the other end of the heating cylinder. The heating pipe is spirally arranged on the inner wall of the heating cylinder, so that the length of the heating pipe in the heating cylinder is greatly increased, the contact area of the plastic and the heating pipe is increased, the plastic is rapidly heated, the plastic is rapidly melted, and the seat accessory injection molding device has the advantages of high plastic melting efficiency.

The utility model discloses a mutton processing thawing pool relates to mutton thawing technical field, including bearing seat, the bearing seat upper end is equipped with the collecting port, the bearing seat lower extreme mounting has the drainage frame. The utility model discloses the bearing seat, drainage frame, thawing pool frame, movable tank, filter screen, sliding slot and rack that set up, the bearing seat as the basis of whole equipment, provides the firm support for thawing pool, ensures when the multiple thawing pool frame of placing and the thawing water containing, equipment can keep stable, avoids the shaking or displacement because of the bearing too big, in the thawing process, the water flow can enter each thawing pool frame in order through the drainage frame, guarantees every piece of mutton to be able to fully contact thawing water, also helps when the water or drainage, let water can flow out smoothly, avoids the waterlogging phenomenon influence thawing efficiency or causes the operation inconvenient.

The utility model relates to the technical field of nylon preparation, and particularly discloses a composite reinforced flame-retardant nylon material preparation device for a new energy automobile, which comprises a mixing bin, a crushing assembly for crushing materials and a mixing assembly for mixing the materials are arranged in the mixing bin, and a connecting pipe is fixed at the bottom of the mixing bin. A heating assembly is arranged at the tail end of the connecting pipe, a feeding pipe is fixed to the top of the mixing bin, and a flow guide pipe is fixed to the output end of the feeding pipe; and the crushing assembly comprises a supporting frame fixed in the mixing bin, a crushing shaft is arranged in the supporting frame in a penetrating mode, crushing cutter teeth are fixed to the periphery of the crushing shaft, an adjusting lead screw is fixed to the bottom of the crushing shaft, and the outer portion of the adjusting lead screw is connected with a lifting sliding block through a screw sleeve. According to the utility model, fed materials can be crushed under the action of the crushing cutter teeth, so that the crushing work of the materials is realized, and after the particles of the materials are reduced, the particles can be quickly fused, and the heating time is shortened.

The present application belongs to converter steelmaking technical field, provide a kind of LF refining quick slag melting method, the present application is injected with pre-melting agent along with molten steel in the process of converter tapping, the composition of pre-melting agent is according to mass percentage respectively: calcium oxide 60-70%, lithium oxide 4-7%, silicon dioxide 3-6%, calcium fluoride 5-10%, magnesium oxide 4-8%, di-aluminum oxide 10-15%, by adding the above pre-melting agent in the process of tapping, while improving the basicity of slag, effectively reduce the melting point of slag, promote the rapid melting of slag, shorten the LF refining station furnace slag melting time, and inhibit the occurrence of phosphorus, reduce the LF refining smelting time, provide good guarantee for rolling quality.The application of the present application can provide a reliable smelting method for improving production efficiency for operators, which can effectively reduce production cost, while ensuring the purity of molten steel.

This invention relates to the field of environmentally friendly dragon dance yarn preparation technology, specifically a high-end intelligent control colored environmentally friendly dragon dance yarn false twist texturing machine. It includes a roller machine and a color-changing component uniformly distributed at the roller machine's inlet end for color modification. The color-changing component includes a second ring tube uniformly distributed on one side of the roller machine and connected to it. A central ring tube is sealed on the side of the second ring tube away from the roller machine, and a first ring tube is installed at the other end of the central ring tube. Both the first and second ring tubes are sealed at the ends away from the central ring tube. The inner cavity of the first ring tube is provided with an outwardly extending feeding module, and the inner cavity of the central ring tube is provided with a dyeing module for color modification. The beneficial effect of this invention is that by integrating the color-changing component at the roller machine's inlet end, the heating and melting of the masterbatch, quantitative conveying, and uniform coloring are integrated into the same process of yarn texturing and texturing, significantly shortening the production process and avoiding the wastewater pollution problems caused by traditional liquid dyes.

The utility model relates to the technical field of chemical production devices, in particular to a warm mix asphalt modifier reaction kettle which comprises a kettle body, a stirring assembly, a crushing assembly, a micro powder feeding assembly and a liquid feeding assembly, the heat insulation plate crushing assembly comprises a crushing box fixedly arranged at the top of the heat insulation plate kettle body, a crushing shaft arranged in the heat insulation plate crushing box and a crushing cutter group fixed on the heat insulation plate crushing shaft; a crushing feed port is formed in the top of the heat insulation plate crushing box, a crushing discharge port is formed in the bottom of the heat insulation plate crushing box, and the heat insulation plate crushing discharge port is located in the heat insulation plate kettle body; a first valve is arranged at the heat-insulating plate crushing discharge hole; and the heat-insulating plate kettle body is provided with a valve control assembly for controlling the opening and closing of the first valve of the heat-insulating plate. The warm mix asphalt modifier reaction kettle disclosed by the utility model can be used for quickly heating large-particle materials.

This utility model discloses an atomizing core and an atomizer. The atomizing core includes a porous cup body, a first heating element, and a second heating element. The porous cup body includes an inner wall surface and an outer wall surface. The inner wall surface forms a cavity for containing the atomizing medium. At least a portion of the first heating element is disposed on the inner wall surface. The first heating element is used to preheat the atomizing medium in the cavity. The second heating element is disposed on the outer wall surface and is used to heat and atomize the atomizing medium seeping from the outer wall surface. The first heating element preheats the atomizing medium in the cavity, causing it to melt into an atomizing liquid. The atomizing liquid seeps out through the porous cup body to the outer wall surface. The second heating element heats and atomizes the seeping atomizing liquid to generate an aerosol. The preheating of the first heating element allows for a timely and stable supply of atomizing liquid to the second heating element, ensuring that the second heating element has sufficient contact with the atomizing liquid during the heating process. This effectively prevents the second heating element from dry burning and avoids core scorching.

This application discloses a laser coaxial hot wire device and method. By having a first laser emitting component and a second laser emitting component emit lasers onto the workpiece, the laser spot of the first laser on the workpiece moves along a first arc-shaped trajectory, and the laser spot of the second laser on the workpiece moves along a second arc-shaped trajectory. The concave side of the second arc-shaped trajectory is positioned opposite to the concave side of the first arc-shaped trajectory, thereby creating a higher temperature in the region of the workpiece located between the two arc-shaped trajectories. This rapidly melts the workpiece surface in this region, forming a molten pool, thus improving the welding formation effect, reducing welding defects, and enabling additive welding and thick plate welding of non-ferrous metal workpieces. Simultaneously, it also rapidly melts the welding wire supplied by the wire feeding mechanism to the region of the workpiece located between the first and second arc-shaped trajectories, allowing the molten wire to fuse well with the molten pool, thereby improving welding quality.

This invention discloses a precipitation monitoring device and its usage method, belonging to the field of precipitation monitoring technology. The precipitation monitoring device includes a column, and further includes: an electrically heated constant-temperature liquid storage tank fixed to the top of the column for storing clean water; a sensor assembly fixed to the top of the column, comprising a circuit board and a GPS sensor, a weight sensor, and a multi-purpose meteorological sensor for monitoring air temperature, hail, and snowfall electrically connected to the circuit board; a storage cylinder on top of the weight sensor, a connecting pipe between the storage cylinder and the electrically heated constant-temperature liquid storage tank, and a solenoid valve installed within the connecting pipe; and a solar panel assembly. This invention improves the applicability and accuracy of precipitation monitoring by rapidly melting snow and hail into water, measuring the weight of the water using the weight sensor, and then calculating the rainfall value.

This invention relates to the field of cell heating equipment, specifically to a cell resuscitation device and method. The cell resuscitation device comprises: a base having an inner cavity; a cylindrical reflector installed within the inner cavity of the base; a cylindrical infrared emitting sheet installed within the inner cavity of the base and situated inside the reflector; a main control board fixedly or detachably connected to the base; an infrared temperature sensor installed on the infrared emitting sheet and electrically connected to the main control board; and a cover plate detachably installed on the base, the cover plate having a first mounting opening penetrating through the center, the first mounting opening being coaxial with the inner cavity of the base.

The utility model discloses a combined type laminating device for leather processing, which relates to the technical field of leather processing equipment and comprises a workbench, a fixed seat is welded and mounted in the middle of the upper end face of the workbench, a mounting frame is mounted in the fixed seat, a movable compression roller is rotatably mounted in the mounting frame, and the movable compression roller is rotatably mounted in the workbench. A groove is formed in the position, corresponding to the lower portion of the movable pressing roller, of the workbench, a fixed pressing roller is rotationally installed in the groove, a hydraulic lifting device is fixedly installed at the top end of the fixed base, a pressing table which is in sliding limiting with the workbench is arranged at the rear end of the fixed base, and electric push rods are installed on the two sides of the pressing table. A mounting base is arranged above the pressing table, an ultrasonic pressing assembly is arranged in the mounting base, and the problems that after different leather materials are compounded through the laminating device, permeation and diffusion of an adhesive and leather fibers are insufficient, and air is prone to being left on an interface to form bubbles and hollowing are solved.

The utility model relates to the technical field of waste recovery, and discloses an environment-friendly candle production waste recovery system which comprises a workbench, a heating box and a bottom plate, the bottom of a discharge port is fixedly connected with a first filter plate, the driving ends of a plurality of air cylinders are fixedly connected with a plurality of connecting rods, and the bottom ends of the connecting rods are fixedly connected with a second filter plate. A first motor is fixedly connected to the top of the second filter plate, a driving shaft is fixedly connected to the driving end of the first motor, a stirring rod is fixedly connected to the other end of the driving shaft, a second motor is fixedly connected to the exterior of the heating box, and a heating rod is fixedly connected to the bottom of the inner wall of the heating box. According to the device, the first filter plate at the bottom of the discharge port primarily performs coarse filtration on waste materials, the multiple air cylinders work cooperatively to control the second filter plate and the stirring rod to ascend and descend, the second filter plate performs secondary filtration, the stirring rod is driven by the first motor to stir up and down, the second motor drives the heating rod to generate heat, and wax in the waste materials is melted.

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.