CN219186682U - Portable constant temperature stirring device - Google Patents

Abstract

The utility model relates to a agitating unit field especially relates to portable constant temperature agitating unit, and it includes cup and stirring subassembly, still includes heating module, refrigerating module and insulating tube, the cup is bilayer structure, the cup includes inner tube and urceolus, stirring subassembly, heating module and refrigerating module all are located between inner tube and the urceolus, the insulating tube is connected simultaneously with refrigerating module and heating module, the insulating tube can carry out heat exchange with the solution in the inner tube, heating module is used for carrying out heat exchange to heating and with the insulating tube, refrigerating module is used for refrigerating and carries out heat exchange with the insulating tube. The application has the effect of facilitating the test personnel to control the temperature of the test solution.

Description

Portable constant temperature stirring device

Technical Field

The application relates to the technical field of stirring devices, in particular to a portable constant-temperature stirring device.

Background

During many chemical experiments, it is often necessary to put the solution into a vessel to agitate the solution. In order to reduce the labor burden of the experimenters and make the stirring of the solution more uniform, the experimenters generally put the solution into the stirring device, so that the stirring device automatically stirs the solution.

The related art discloses a magnetic stirring container, which comprises a containing cup, a motor, a magnetic rod and a driving magnet, wherein the magnetic rod is horizontally arranged on the bottom wall of the inner side of the containing cup. The motor is arranged at the bottom of the containing cup, and the driving magnet is arranged on the output shaft of the motor. The driving magnet is positioned at a position right below the containing cup and corresponding to the magnetic rod. The magnetic rod is connected with the driving magnet through magnetism, so that the driving magnet can be driven to rotate when the output shaft of the motor rotates, and the magnetic rod is driven to rotate.

In the test process, the temperature of some solutions needs to be controlled when in use, or other solutions need to be added for reflection under the constant-temperature stirring effect. It is therefore necessary to put the stirring vessel into an incubator for heating, and the temperature of the solution in the stirring vessel changes with time after the stirring vessel is taken out of the incubator. It is therefore difficult for a tester to control the temperature of the solution in the agitation vessel when performing the test using the agitation vessel in the related art.

Disclosure of Invention

For the convenience test personnel to control the temperature of test solution when experimental, this application provides portable constant temperature agitating unit.

The portable constant temperature stirring device that this application provided adopts following technical scheme:

the portable constant temperature stirring device comprises a cup body and a stirring assembly, and further comprises a heating module, a refrigerating module and a heat preservation pipe, wherein the cup body is of a double-layer structure, the cup body comprises an inner cylinder and an outer cylinder, the stirring assembly, the heating module and the refrigerating module are all located between the inner cylinder and the outer cylinder, the heat preservation pipe is simultaneously connected with the refrigerating module and the heating module, the heat preservation pipe can exchange heat with a solution in the inner cylinder, and the heating module is used for heating and exchanging heat with the heat preservation pipe, and the refrigerating module is used for refrigerating and exchanging heat with the heat preservation pipe.

Through adopting above-mentioned technical scheme, heating module, refrigerating module, stirring subassembly and insulating tube set up between inner tube and urceolus, make full use of the space between inner tube and the urceolus reduces agitating unit and deposits occupied space to make things convenient for the test personnel to carry. When experimenters need a device for constant-temperature stirring of the solution, the heating module or the refrigerating module can be controlled to work according to the temperature of the solution, and the heating module or the refrigerating module works and exchanges heat with the heat preservation pipe, so that the temperature of the heat preservation pipe rises or falls. Then the heat preservation pipe exchanges heat with the solution in the inner cylinder, thereby realizing rapid temperature rise and temperature reduction of the solution. When the solution reaches the test temperature, the heating module and the refrigerating module work alternately to keep the temperature in the inner cylinder balanced. The temperature of the solution in the inner cylinder is controlled accurately.

Optionally, the temperature control probe is used for measuring the temperature of the solution in the inner cylinder and transmitting measured temperature information to the controller, the controller is arranged on the outer cylinder, and the controller can control the heating module, the refrigerating module and the stirring assembly according to the temperature information measured by the temperature control probe.

Through adopting above-mentioned technical scheme, when agitating unit used, the experimenter can set for the temperature in to the controller, and the controller compares the temperature that temperature control probe measured with the temperature that the experimenter set for, then automatic control heats module or refrigeration module work, realizes the automatic control of solution temperature in the inner tube.

Optionally, the heating module includes the electric heating piece, the electric heating piece is located the one side that the inner tube is close to ground, the electric heating piece is the semiconductor refrigeration piece, and the hot face of semiconductor refrigeration piece is towards the insulating tube is used for heating the insulating tube.

By adopting the technical scheme, the heat-insulating pipe is heated by the hot surface of the semiconductor refrigerating sheet, so that the temperature of the heat-insulating pipe is raised, and the temperature of the solution in the inner cylinder is raised.

Optionally, the heating module further includes a heat exchange member, the heat exchange member is a shell structure, the heat exchange member is located one side that the semiconductor refrigeration piece is close to the inner tube, and one side that the heat exchange member is close to the semiconductor refrigeration piece is laminated with the hot face of semiconductor refrigeration piece, be provided with energy storage liquid in the heat exchange member, energy storage liquid can carry out heat exchange with the hot face of semiconductor refrigeration piece and can carry out heat exchange with the insulating tube.

By adopting the technical scheme, the heat exchange piece is attached to the hot surface of the semiconductor refrigeration piece, so that the heat exchange piece can better exchange heat with the hot surface of the semiconductor refrigeration piece, and the waste of heat during the operation of the semiconductor refrigeration piece is reduced. After the heat exchange between the heat exchange piece and the hot surface of the semiconductor refrigerating piece, the heat exchange piece exchanges heat with the energy storage liquid in the heat exchange piece, and stores heat.

Optionally, the heating module further comprises a cooling fin, the cooling fin is arranged on one side, far away from the inner barrel, of the electric heating element, the cooling fin is of a plate-shaped structure, and one side, close to the electric heating element, of the cooling fin is attached to the cold face of the semiconductor refrigerating fin.

Through adopting above-mentioned technical scheme, increase the semiconductor refrigeration piece and control area of contact through the fin to improve the heat transfer rate between semiconductor refrigeration piece and the air, reduce the phenomenon that the cold face of semiconductor refrigeration piece appears freezing.

Optionally, the heating module further comprises a heat dissipation fan, the heat dissipation fan is mounted on the bottom wall of the outer barrel, the heat dissipation fan is located right below the heat dissipation fin, an air outlet is formed in the outer bottom wall of the outer barrel corresponding to the heat dissipation fan, and the air outlet is communicated with the inside of the outer barrel.

Through adopting above-mentioned technical scheme, improve the velocity of flow of fin position air through the radiator fan to improve the radiating effect of fin, further reduce the phenomenon that icing appears in the cold face of semiconductor refrigeration piece.

Optionally, the insulating tube includes spiral portion exchange portion and connecting portion, spiral portion is spiral winding on the inner tube along the length direction of inner tube, exchange portion sets up to two, and two exchange portions all connect refrigeration module and heating module simultaneously, the both ends of connecting portion communicate with the one end that two exchange portions are close to each other respectively, two the one end that connecting portion was kept away from to the exchange portion communicates with the both ends of spiral portion respectively.

Through adopting above-mentioned technical scheme, the area of contact of refrigerating module and heating module and insulating tube has been improved in the setting of two exchange portions, and then has improved the speed that the insulating tube was heated up and was cooled down to can make solution rapid heating up or cooling. The spiral part is spirally wound on the outer side wall of the inner cylinder, so that different positions of the solution in the inner cylinder can be subjected to heat exchange with the heat preservation pipe, the solution is heated uniformly, and the temperature rising or reducing speed of the solution is improved.

Optionally, the inside of urceolus is provided with the shutoff board, the shutoff board rotates around the axis of radiator fan to be connected on the urceolus, rotates the shutoff board can carry out the shutoff to the air outlet.

Through adopting above-mentioned technical scheme, when agitating unit is idle, rotates the shutoff board and seals up the air outlet to reduce outside dust and carry out the urceolus inside and cover on the fin, cause the influence to the radiating effect of fin.

Optionally, the heat preservation pipe is provided with the heat conduction liquid, be provided with the circulating pump on the heat preservation pipe, the circulating pump is used for driving the heat conduction liquid to flow.

Through adopting above-mentioned technical scheme, thereby make the liquid circulation flow in the insulating tube through the circulating pump improve the heat exchange rate of insulating tube and heat exchange piece, thereby improve the heat exchange rate of insulating tube and solution, improve the speed that the solution was raised temperature or was cooled down.

Drawings

Fig. 1 is a cross-sectional view of a cup according to a first embodiment of the present application.

Fig. 2 is a schematic view of the internal structure of the outer tub according to the first embodiment of the present application.

Fig. 3 is a schematic structural view of a heating module and a cooling module according to a first embodiment of the present application.

Fig. 4 is a schematic structural view of a plugging assembly according to a second embodiment of the present application.

Reference numerals: 1. a cup body; 11. an inner cylinder; 12. an outer cylinder; 13. an air outlet; 2. a heating module; 21. an electric heating element; 22. a heat sink; 23. a heat exchange member; 24. a heat dissipation fan; 3. a heat preservation pipe; 31. a spiral part; 32. an exchange section; 33. a connection part; 34. a circulation pump; 4. a control module; 41. a controller; 42. a temperature control probe; 5. a stirring assembly; 51. a stirring motor; 52. a magnetic rod; 6. a rechargeable battery; 7. a plugging assembly; 71. a plugging plate; 711. a blocking part; 712. connecting; 72. a knob; 8. a refrigeration module.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-4.

Example 1

The embodiment of the application discloses a portable constant temperature stirring device.

Referring to fig. 1, the portable constant temperature stirring device comprises a cup body 1, a heating module 2, a refrigerating module 8, a heat preservation pipe 3, a control module 4 and a stirring assembly 5. The cup body 1 is of a barrel-shaped double-layer structure, the cup body 1 comprises an inner barrel 11 and an outer barrel 12, the outer barrel 12 is sleeved outside the inner barrel 11, and the outer barrel 12 is connected with the side surface, far away from the ground, of the inner barrel 11 through a circular ring-shaped plate. The heating module 2, the cooling module 8 and the stirring assembly 5 are all arranged between the inner cylinder 11 and the outer cylinder 12. The heat preservation pipe 3 is connected to the outer side wall of the inner cylinder 11, the heat preservation pipe 3 is connected with the heating module 2, the heating module 2 can heat the heat preservation pipe 3, and then the heat preservation pipe 3 heats the inner cylinder 11, so that the temperature of the solution in the inner cylinder 11 is raised; the heat preservation pipe 3 is connected with the refrigeration module 8, and the refrigeration module 8 can cool down the heat preservation pipe 3, and then the heat preservation pipe 3 cools down the inner tube 11, realizes cooling down the solution in the inner tube 11. The stirring assembly 5 is installed at the bottom of the inner cylinder 11 for stirring the solution in the inner cylinder 11. The control module 4 is mounted on the side wall of the outer cylinder 12, and the control module 4 is used for controlling the operation of the heating module 2, the refrigerating module 8 and the stirring assembly 5. When the solution needs to be heated, the control module 4 controls the heating module 2 to work to heat the solution, and when the solution needs to be cooled, the control module 4 controls the cooling module 8 to work to cool the solution. The control module 4 controls the operation of the stirring assembly 5 when stirring of the solution is desired. The temperature control function and the stirring function of the stirring device are realized through the refrigerating module 8, the heating module 2 and the stirring assembly 5, so that the temperature of the solution can be conveniently controlled by a tester. And the stirring device integrates multiple functions, fully utilizes the space between the inner cylinder 11 and the outer cylinder 12, occupies small space and is convenient for test personnel to carry.

Referring to fig. 2, a rechargeable battery 6 is fixedly connected to the side wall of the outer cylinder 12, and the rechargeable battery 6 is used for supplying power to the refrigerating module 8, the heating module 2, the stirring assembly 5 and the control module 4. Through the setting of rechargeable battery 6, the testers need not to carry instruments such as wiring board, plug when carrying this agitating unit to further make agitating unit conveniently carry.

Referring to fig. 1 and 2, the stirring assembly 5 includes a stirring motor 51 and a magnetic rod 52, the stirring motor 51 is mounted on the outer cylinder 12, the stirring motor 51 is disposed below the inner cylinder 11, and an output shaft of the stirring motor 51 faces the inner cylinder 11 and is coaxial with the inner cylinder 11. The magnetic rod 52 is horizontally arranged on the output shaft of the stirring motor 51, and the rotation of the output shaft of the stirring motor 51 can drive the magnetic rod 52 to rotate. The inner cylinder 11 is horizontally provided with a magnetic stirring rod, and the magnetic stirring rod is magnetically connected with the magnetic rod 52. The magnetic stirring rod 52 can be driven to rotate by rotating, so that the stirring of the solution in the inner cylinder 11 is realized.

Referring to fig. 1, the control module 4 includes a controller 41 and a temperature control probe 42, the temperature control probe 42 is installed on an outer sidewall of the inner cylinder 11, and the temperature control probe 42 is connected with the controller 41 to measure a temperature of a solution in the inner cylinder 11 and transmit temperature information to the controller 41. The controller 41 can control the operation of the cooling module 8 or the heating module 2 according to the information measured by the temperature control probe 42, so that the temperature of the solution in the inner cylinder 11 can be maintained at a temperature required for the test.

Referring to fig. 1, 2 and 3, the heating module 2 includes an electric heating element 21 and a heat sink 22, the electric heating element 21 is mounted on the outer cylinder 12, the electric heating element 21 is located at one side of the inner cylinder 11 near the ground, and the electric heating element 21 is used for heating the heat insulation pipe 3. In this embodiment, the electric heating element 21 is a semiconductor cooling plate, and the semiconductor cooling plate is horizontally arranged. The semiconductor refrigerating sheet comprises a cold surface and a hot surface, the cold surface of the semiconductor refrigerating sheet in the heating module 2 faces the ground, and the heat preservation pipe 3 is positioned on one side of the hot surface of the semiconductor refrigerating sheet. The heat preservation pipe 3 can be heated through the semiconductor refrigerating sheet, and then the solution inside the inner cylinder 11 is heated. The radiating fin 22 is of a plate-shaped structure, the radiating fin 22 is horizontally arranged on one side where the cold face of the semiconductor refrigerating fin is located, and one side, close to the semiconductor refrigerating fin, of the radiating fin 22 is attached to the cold face of the semiconductor refrigerating fin. Thereby promoting the heat exchange between the cold surface of the semiconductor refrigerating sheet and the external environment, and reducing the phenomenon of icing on the cold surface of the semiconductor. The heat sink 22 is made of a metal material having a good heat conductive property, for example: barrels, aluminum, and the like. The material of the heat sink 22 in this embodiment is aluminum.

Referring to fig. 1, 2 and 3, the heating module 2 further includes a heat exchanging member 23, and the heat exchanging member 23 is configured to absorb heat of a hot surface of the electric heating member 21 and transfer the heat to the heat insulation pipe 3. The heat exchange member 23 is a square shell structure, and the heat exchange member 23 is filled with energy storage liquid, which is water in this embodiment. The heat exchange piece 23 is located one side where the heating surface of the electric heating piece 21 is located, and the side surface, close to the electric heating piece 21, of the heat exchange piece 23 is attached to and bonded with the electric heating piece 21, so that the heat exchange piece 23 can perform heat exchange with the semiconductor heating piece better, and heat loss in the working process of the electric heating piece 21 is reduced. When the electric heating element 21 works, the electric heating element 21 exchanges heat with the heat exchange element 23, then the heat exchange element 23 exchanges heat with energy storage liquid in the heat exchange element 23, then the heat exchange is carried out between the energy storage liquid and the heat preservation pipe 3, and finally the heat preservation pipe 3 exchanges heat with the solution in the inner cylinder 11, so that the solution in the inner cylinder 11 is heated.

Referring to fig. 1, 2 and 3, the heating module 2 further includes a heat dissipation fan 24, the heat dissipation fan 24 is located right below the heat dissipation plate 22, and the heat dissipation fan 24 is fixedly connected with the heat dissipation plate 22 through a fixing rod. A supporting rod is arranged below the heat radiating fan 24, one end of the supporting rod is adhered to the inner bottom wall of the outer cylinder 12, and the other end of the supporting rod is adhered to the heat radiating fan 24, so that the heat radiating fan 24 is fixed. The heat dissipation fan 24 is used for improving the air flow speed of the position of the heat dissipation fin 22 and improving the heat dissipation effect of the heat dissipation fin 22.

Referring to fig. 1, 2 and 3, the structure and principle of the refrigeration module 8 and the heating module 2 are the same, and the refrigeration module 8 and the heating module 2 are arranged at intervals. The refrigerating module 8 differs from the heating module 2 in that the cold surfaces of the semiconductor refrigerating sheets in the refrigerating module 8 face the heat exchange member 23 and are bonded to the heat exchange member 23. When the refrigeration module 8 works, the cold surface of the semiconductor refrigeration piece exchanges heat with the heat exchange piece 23 corresponding to the refrigeration module 8, so that the temperature of the heat preservation pipe 3 is reduced, and the temperature of the solution in the inner barrel 11 is reduced.

Referring to fig. 1 and 3, an air outlet 13 is formed in the bottom wall of the outer cylinder 12. The air outlet 13 communicates with the inside of the outer tube 12, so that the heat radiating fins 22 can exchange heat with the outside air, and the heat radiating effect of the heat radiating fins 22 is improved. The air outlets 13 are provided in two corresponding to the heating module 2 and the cooling module 8. The outer bottom wall of the outer cylinder 12 is provided with a plurality of supporting legs for supporting the outer cylinder 12, so that the situation that the air outlet 13 is blocked by the test bed is reduced.

Referring to fig. 1 and 2, the thermal insulation pipe 3 includes a screw portion 31, an exchange portion 32, and a connection portion 33. The exchanging part 32 is horizontally arranged, and the exchanging part 32 passes through the heat exchanging element 23 of the refrigeration module 8 and the heat exchanging element 23 of the heating module 2 at the same time. The number of the exchanging portions 32 is two, and the two exchanging portions 32 are arranged at intervals in a direction parallel to the ground and perpendicular to the length of the exchanging portions 32. Both ends of the connection portion 33 communicate with one ends of the two exchange portions 32, which are close to each other, respectively, and form a U-shape. The heat preservation coil pipe is spirally wound on the outer side wall of the inner cylinder 11 along the axis of the inner cylinder 11. Both ends of the spiral part 31 are respectively communicated with one ends of the two exchanging parts 32 far from the connecting part 33, so that the heat preservation pipe 3 is a closed pipeline. The heat preservation pipe 3 is internally provided with heat conduction liquid, and one of the exchange parts 32 is provided with a circulating pump 34. The circulation pump 34 is used for driving the heat-conducting liquid in the heat-preserving pipe 3 to flow. When the stirring device is in use, the circulating pump 34 is started, the liquid in the exchange part 32 exchanges heat with the energy storage liquid in the heat exchange part 23 when flowing through the heat exchange part 23, then flows to the spiral part 31, and when the temperature-conducting liquid flows through the spiral part 31, the temperature-conducting liquid exchanges heat with the spiral part 31, and the spiral part 31 exchanges heat with the solution in the inner cylinder 11. The heat-conducting liquid after heat exchange flows out from the spiral part 31, and flows through the exchange part 32 again to exchange heat with the energy storage liquid in the heat exchange piece 23, so that the speed of heating or cooling the solution by the stirring device is increased.

The implementation principle of the portable constant temperature stirring device in the embodiment of the application is as follows: the stirring device is started, and the controller 41 stirs the solution according to the set value of the tester. The temperature of the solution in the inner cylinder 11 at the temperature control probe 42 is measured and transmitted to the controller 41, and the controller 41 compares the temperature information transmitted by the temperature control probe 42 with a preset value of a tester. When the solution needs to be heated, the controller 41 controls the heating module 2 to work, and when the solution needs to be cooled, the controller controls the cooling module 8 to work, so that the temperature of the solution in the inner cylinder 11 is controlled. And heating module 2, refrigerating module 8 and stirring subassembly 5 of agitating unit all set up between inner tube 11 and urceolus 12, reduce agitating unit's volume, make things convenient for the test personnel to agitating unit's carry.

Example 2

Referring to fig. 4, the present embodiment is different from the first embodiment in that the shape of the air outlet 13 is different, and the blocking component 7 is disposed at the air outlet 13. In this embodiment, two sets of air outlets 13 are provided, and the two sets of air outlets 13 correspond to the heating module 2 and the cooling module 8 respectively. Each group of air outlets 13 comprises a plurality of air outlets 13, the air outlets 13 are of a fan-shaped structure, and the air outlets 13 are coaxial with the radiating fan 24. The plurality of air outlets 13 are uniformly spaced around the axis of the heat dissipation fan 24. The two groups of air outlets 13 are arranged corresponding to the two groups of the plugging components 7, and the plugging components 7 are used for plugging the air outlets 13 when the stirring device is idle, so that dust enters the outer cylinder 12 when the stirring device is idle and covers the cooling fins 22 to influence the cooling effect of the cooling fins 22.

Referring to fig. 4, the closure assembly 7 includes a closure plate 71, the closure plate 71 being mounted on a side wall of the interior of the outer barrel 12 adjacent the ground. The sealing plate 71 includes a sealing portion 711 and a land 712, the land 712 has a disk-shaped structure, the land 712 is coaxially provided with the heat radiation fan 24, and the land 712 is rotatable about its own axis. The blocking plate 71 has a fan-shaped plate structure, and the blocking plate 71 is disposed coaxially with the heat radiation fan 24. The plurality of plugging plates 71 are arranged corresponding to the plurality of air outlets 13 in the same group, one ends of the plurality of plugging plates 71 close to the connecting disc 712 are connected with the connecting disc 712, and the plugging parts 711 and the connecting disc 712 are integrally formed for convenient manufacture and processing. The rotating connecting disc 712 can drive the blocking portion 711 to rotate, and when the position of the blocking portion 711 corresponds to the air outlet 13, the blocking portion 711 can block the air outlet 13. When the blocking part 711 is staggered with the air outlet 13, the inside of the outer cylinder 12 of the air outlet 13 is communicated with the outside through the air outlet 13.

Referring to fig. 2, the plugging assembly 7 further includes a knob 72, the knob 72 is located outside the outer cylinder 12, one end of the knob 72 extends into the outer cylinder 12 and is in hot-melt connection with the connecting disc 712, and the plugging plate 71 can be driven to rotate by rotating the knob 72, so that a test person can conveniently open and close the air outlet 13.

The implementation principle of the portable constant temperature stirring device in the embodiment of the application is as follows: the rotary knob 72 drives the plugging plate 71 to rotate, and when the stirring device is used, the rotary knob 72 staggers the positions of the plugging part 711 and the air outlet 13, so that the inside of the outer cylinder 12 is communicated with the outside air, and the heat dissipation of the radiating fins 22 is facilitated. When the stirring device is idle, the knob 72 is turned to enable the blocking part 711 to correspond to the position of the air outlet 13, so that external dust is reduced from entering the outer cylinder 12, and the heat dissipation effect of the heat dissipation fins 22 is influenced.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (9)

1. Portable constant temperature agitating unit, including cup (1) and stirring subassembly (5), its characterized in that: still include heating module (2), refrigerating module (8) and insulating tube (3), cup (1) are bilayer structure, cup (1) are including inner tube (11) and urceolus (12), stirring subassembly (5), heating module (2) and refrigerating module (8) all are located between inner tube (11) and urceolus (12), insulating tube (3) are connected (712) simultaneously with refrigerating module (8) and heating module (2), insulating tube (3) can carry out heat exchange with the solution in inner tube (11), heating module (2) are used for carrying out heat exchange to heating and with insulating tube (3), refrigerating module (8) are used for refrigerating and carry out heat exchange with insulating tube (3).

2. The portable thermostatic stirring device of claim 1 wherein: still include control module (4), control module (4) include controller (41) and control by temperature change probe (42), control by temperature change probe (42) are installed on inner tube (11), control by temperature change probe (42) are used for measuring the temperature of solution in inner tube (11) to give controller (41) with measured temperature information transfer, controller (41) are installed on urceolus (12), and controller (41) can control heating module (2), refrigerating module (8) and stirring subassembly (5) according to the temperature information that control by temperature change probe (42) measured.

3. The portable thermostatic stirring device of claim 1 wherein: the heating module (2) comprises an electric heating element (21), the electric heating element (21) is located on one side, close to the ground, of the inner cylinder (11), the electric heating element (21) is a semiconductor refrigerating sheet, and the hot surface of the semiconductor refrigerating sheet faces the heat preservation pipe (3) and is used for heating the heat preservation pipe (3).

4. A portable thermostatic stirring device according to claim 3 wherein: the heating module (2) further comprises a heat exchange piece (23), the heat exchange piece (23) is of a shell structure, the heat exchange piece (23) is located on one side, close to the inner barrel (11), of the semiconductor refrigerating piece, one side, close to the semiconductor refrigerating piece, of the heat exchange piece (23) is attached to the hot surface of the semiconductor refrigerating piece, energy storage liquid is arranged in the heat exchange piece (23), and the energy storage liquid can exchange heat with the hot surface of the semiconductor refrigerating piece and can exchange heat with the heat preservation pipe (3).

5. A portable thermostatic stirring device according to claim 3 wherein: the heating module (2) further comprises a radiating fin (22), the radiating fin (22) is arranged on one side, far away from the inner barrel (11), of the electric heating element (21), the radiating fin (22) is of a plate-shaped structure, and one side, close to the electric heating element (21), of the radiating fin (22) is attached to the cold face of the semiconductor refrigerating fin.

6. A portable thermostatic stirring device according to claim 3 wherein: the heating module (2) further comprises a heat dissipation fan (24), the heat dissipation fan (24) is arranged on the bottom wall of the outer barrel (12), the heat dissipation fan (24) is located under the heat dissipation fins (22), an air outlet (13) is formed in the outer bottom wall of the outer barrel (12) corresponding to the heat dissipation fan (24), and the air outlet (13) is communicated with the inside of the outer barrel (12).

7. The portable thermostatic stirring device of claim 6 wherein: the heat preservation pipe (3) comprises a spiral part (31), an exchange part (32) and a connecting part (33), the spiral part (31) is spirally wound on the inner cylinder (11) along the length direction of the inner cylinder (11), the exchange parts (32) are arranged in two, the two exchange parts (32) are simultaneously connected with a refrigerating module (8) and a heating module (2) (712), two ends of the connecting part (33) are respectively communicated with one ends, close to the two exchange parts (32), of the two exchange parts (32) respectively, and one ends, far away from the connecting part (33), of the two exchange parts are respectively communicated with two ends of the spiral part (31).

8. The portable thermostatic stirring device of claim 7 wherein: the inside of urceolus (12) is provided with shutoff board (71), shutoff board (71) are connected (712) on urceolus (12) around the axis rotation of radiator fan (24), rotate shutoff board (71) can carry out the shutoff to air outlet (13).

9. The portable thermostatic stirring device of claim 7 wherein: the heat preservation pipe (3) is internally provided with heat conduction liquid, the heat preservation pipe (3) is provided with a circulating pump (34), and the circulating pump (34) is used for driving the heat conduction liquid to flow.

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