Wide-temperature-zone constant-temperature heating device

Abstract

The utility model belongs to the field of heating, and particularly relates to a wide-temperature-zone constant-temperature heating device, which comprises a heating case, a magnetic stirrer and an electric heater, a plurality of cavities are arranged in the heating case, and the heating case is sequentially divided into a heating zone, a refrigeration zone and a power zone; a temperature sensor is mounted in the heating area; the refrigeration area is used for cooling the heating area; a magnetic stirrer is installed in the power area, the electric heater is electrically connected with a heat conduction pipe, the heat conduction pipe is located in the heating area, a cold source conduction tank is installed in the refrigeration area, a clamping structure is arranged at the top of the heating area, and a bottom plate is installed at the bottom of the refrigeration area. A worker can replace clamping plates with different caliber types according to cup bodies with different sizes, the clamping plates can be pulled out only by pulling a handle during replacement, the operation is simple and convenient, and the adaptability to different cup bodies is improved.

Description

Technical Field

[0001] The utility model belongs to the field of heating, and in particular relates to a wide temperature range constant temperature heating device. Background Art

[0002] A heating device is a device that can provide heating capabilities and is widely used in the experimental field. When direct heating is used, uneven heating may cause local overheating of the heated vessel, and the accuracy of temperature control is relatively low, which also increases the risk of breakage or damage. When bath heating is used, workers are required to hold clamping tools to place the heated vessel into the bath heating device. Long-term holding makes the workers tired and experimental accidents are prone to occur. After the experiment is completed, the bath heating liquid usually cools naturally and takes a long time to cool. Long-term exposure of the bath heating liquid to the air will cause pollution and affect subsequent secondary utilization. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The utility model provides a wide temperature range constant temperature heating device to solve the above problems. (II) Contents of the utility model

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A wide temperature range constant temperature heating device, comprising a heating box, a magnetic stirrer and an electric heater, wherein the upper and lower ends of the heating box are both open, and the heating box is provided with a plurality of cavities inside and is sequentially divided into three parts: a heating area, a cooling area and a power area;

[0008] The bottom of the inner cavity of the heating zone is connected with a liquid adding pipe, the free end of the liquid adding pipe passes through the heating box and extends outside, and the outer wall of the pipe is connected with a pump for controlling liquid adding or liquid draining, and a temperature sensor is installed in the heating zone;

[0009] The refrigeration zone is used to cool the heating zone;

[0010] A magnetic stirrer is installed in the power zone, the electric heater is electrically connected to a heat pipe, the heat pipe is located in the heating zone, a cold source conduction tank is installed in the refrigeration zone, a clamping structure is provided on the heating chassis, and a bottom plate is installed at the bottom of the heating chassis;

[0011] A final control platform is arranged on one side of the heating cabinet, and the final control platform is electrically connected to the temperature sensor, the magnetic stirrer and the electric heater.

[0012] Furthermore, the heat conducting pipe is annularly fixedly connected to the center of the bottom of the inner cavity of the heating zone, and the magnetic stirrer in the power zone is located directly below the heat conducting pipe.

[0013] Furthermore, one end of the heat-conducting tube is electrically connected to a conductive rod, a motor and a safety plug are arranged inside the electric heater, the free end of the conductive rod passes through the heating zone and the electric heater and extends to just above the safety plug, a sliding slot is arranged on the safety plug, and an electrical head is elastically arranged at the free end of the conductive rod, and the electrical head is plugged into the sliding slot;

[0014] An electromagnet is fixedly connected to one side of the electric heater close to the sliding slot, and the electromagnet is electrically connected to the motor.

[0015] Furthermore, the terminal control platform is provided with a temperature control terminal, a magnetic adjustment knob, an agitator control switch and a heater control switch, the temperature control terminal is electrically connected to the motor, the magnetic adjustment knob is electrically connected to the magnetic agitator, and the agitator control switch and the heater control switch are electrically connected to the magnetic agitator and the temperature control terminal respectively.

[0016] Further, the cold source conduction tank is a metal conduit, and the refrigeration zone is provided with two groups, and is respectively located on both sides of the heating zone. Multiple metal conduits are installed in the two groups of refrigeration zones, and the multiple metal conduits are provided with thermal conductive plates, and the thermal conductive plates penetrate the heating zone and are connected with the inside of the heating zone, and the multiple metal conduits in each group of refrigeration zones are interconnected, and a cold source discharge pipe and a cold source discharge pipe are respectively embedded on one side of the heating chassis, and the two metal conduits at the edge of the refrigeration zone of the same group are respectively connected with the cold source discharge pipe and the cold source discharge pipe;

[0017] A first connecting pipe and a second connecting pipe are arranged between the two groups of metal pipes in the refrigeration zone, and the first connecting pipe and the second connecting pipe are connected with the two groups of metal pipes.

[0018] Furthermore, the first connecting pipe and the cold source discharge pipe are in the same vertical plane;

[0019] The second connecting pipe and the cold source discharge pipe are in the same vertical plane;

[0020] The first connecting pipe is provided with an intake check valve, and the second connecting pipe is provided with an exhaust check valve.

[0021] Furthermore, a plurality of limit slots are provided on the top of the heating chassis, and the clamping structure includes a sealing plate, a clamping plate and two cover plates, the bottom of the sealing plate is fixedly connected with a limit plug rod adapted to the limit slot, the sealing plate is located directly above the heating zone, the sealing plate is provided with a plug-in slot, the bottom of the plug-in slot has an abutment plate extending inward, the two cover plates are respectively fixedly connected to the two sides of the sealing plate and are located directly above the two refrigeration zones, one side of the sealing plate is also provided with an insertion port connected to the plug-in slot, the clamping plate is slidably connected to the plug-in slot through the insertion port, the bottom of the clamping plate abuts against the abutment plate, and the clamping plate is provided with a connecting port.

[0022] Furthermore, the sealing plate is symmetrically provided with lifting grooves;

[0023] A handle is fixedly connected to one side of the clamping plate, and an anti-slip pad is fixedly connected inside the communicating port.

[0024] Furthermore, the clamping plate has communicating openings with various apertures.

[0025] (III) Beneficial effects

[0026] Compared with the prior art, the beneficial effects of the utility model are:

[0027] 1. In the present invention, when in use, the staff can replace the clamping plates of different calibers according to the cups of different sizes. When replacing, they only need to pull the handle to pull out the clamping plate, which is simple and convenient, and improves the adaptability to different cups.

[0028] 2. In the utility model, when in use, the heating temperature of the heating zone is adjusted through the temperature control terminal. During the heating process, when the temperature of the liquid in the heating zone reaches the set temperature, the temperature control terminal controls the motor to energize the electromagnet. After the electromagnet is energized, suction is generated to adsorb the electrical head out of the sliding slot. At this time, the heat pipe stops heating. When the temperature of the liquid in the heating zone is lower than the set temperature, the temperature control terminal controls the motor to stop energizing the electromagnet. At this time, the electromagnet loses its adsorption force on the electrical head, and the electrical head is reset back to the sliding slot. At this time, the heat pipe continues to heat, so that the heated experimental liquid is at a constant temperature.

[0029] 3. In the utility model, the liquid adding pipe is connected to the external liquid storage device, and the heating area can be filled with liquid or drained by a pump to prevent the liquid from being contaminated by long-term contact with light or air. When the cup is placed on the connecting port, the sealing plate, the clamping plate and the cup can cover the top of the heating area to prevent liquid from splashing out and prevent the liquid in the heating area from being exposed to light, further avoiding contamination.

[0030] 4. In the utility model, the metal conduit connected to the cold source discharge pipe can transport the cold source through the first connecting pipe to the metal conduit in another group of refrigeration zones under the action of the air intake check valve. The metal conduits in the other group of refrigeration zones can discharge the cold source through the second connecting pipe into the metal conduit connected to the cold source discharge pipe under the action of the exhaust check valve, forming a cycle. The cold source can be discharged through the set cold source discharge pipe, and then new cold source can be continuously discharged from the cold source discharge pipe into the metal conduit, thereby improving the cooling efficiency.

[0031] 5. In the utility model, the heat conduction pipe is fixedly connected at the bottom center of the inner cavity of the heating zone in a circular ring shape, which can evenly distribute the heat and improve the heating efficiency. The magnetic stirrer in the power zone is located directly below the heat conduction pipe, which can stir the liquid faster and improve the heating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A three-dimensional schematic diagram of the utility model as a whole;

[0033] Figure 2 This is a distribution diagram of the heating area, cooling area and power area in the heating case of the utility model;

[0034] Figure 3 It is a schematic diagram of the interior of the electric heater in the utility model;

[0035] Figure 4 It is a schematic diagram of the metal conduit, the cold source discharge pipe, the cold source discharge pipe, the first connecting pipe, the second connecting pipe and the thermal conductive sheet in the utility model;

[0036] Figure 5 It is an exploded schematic diagram of the sealing plate, the clamping plate and the anti-slip pad in the utility model.

[0037] In the figure: 1. Heating chassis; 2. Magnetic stirrer; 3. Electric heater; 4. Heating zone; 5. Refrigeration zone; 6. Power zone; 7. Liquid adding pipe; 8. Pump; 9. Temperature sensor; 10. Heat pipe; 11. Cold source conduction tank; 12. Final control platform; 13. Conductive rod; 14. Motor; 15. Insurance plug; 16. Sliding slot; 17. Electrical head; 18. Electromagnet; 19. Temperature control terminal; 20. Magnetic adjustment knob; 21. Stirrer control switch; 22. Heating Device control switch; 23, metal conduit; 24, cold source discharge pipe; 25, cold source discharge pipe; 26, first connecting pipe; 27, second connecting pipe; 28, intake check valve; 29, exhaust check valve; 30, limit slot; 31, sealing plate; 32, clamping plate; 33, cover plate; 34, limit rod; 35, plug-in slot; 36, abutment plate; 37, bottom plate; 38, insertion port; 39, connecting port; 40, lifting slot; 41, handle; 42, anti-slip pad; 43, thermal conductive sheet. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] Embodiment 1

[0040] like Figure 1-Figure 5 As shown, a wide temperature range constant temperature heating device comprises a heating chassis 1, a magnetic stirrer 2 and an electric heater 3. The upper and lower ends of the heating chassis 1 are both open. Figure 2 As shown, the heating box 1 has a plurality of cavities inside and is divided into three parts, a heating area 4, a cooling area 5 and a power area 6;

[0041] The bottom of the inner cavity of the heating zone 4 is connected with a liquid adding pipe 7, the free end of the liquid adding pipe 7 penetrates the heating cabinet 1 and extends outside, and the outer tube wall is connected with a pump 8 for controlling liquid adding or liquid draining, the liquid adding pipe 7 is connected with an external liquid storage device, and the heating zone 4 can be filled with liquid or drained by the pump 8 to avoid the liquid from being contaminated by long-term contact with light or air. A temperature sensor 9 is installed in the heating zone 4, and the temperature of the liquid in the heating zone 4 can be detected by the set temperature sensor 9;

[0042] The refrigeration zone 5 is used to cool down the heating zone 4;

[0043] A magnetic stirrer 2 is installed in the power zone 6, the electric heater 3 is electrically connected to a heat pipe 10, the heat pipe 10 is located in the heating zone 4, a cold source conduction tank 11 is installed in the cooling zone 5, a clamping structure is provided on the heating chassis 1, and a bottom plate 37 is installed at the bottom of the heating chassis 1;

[0044] A final control platform 12 is provided on one side of the heating cabinet 1 , and the final control platform 12 is electrically connected to the temperature sensor 9 , the magnetic stirrer 2 and the electric heater 3 .

[0045] Further, such as Figure 2 As shown, the heat pipe 10 is fixedly connected in a circular ring shape at the center of the bottom of the inner cavity of the heating zone 4, which can evenly distribute the heat and improve the heating efficiency. The magnetic stirrer 2 in the power zone 6 is located directly below the heat pipe 10, which can stir the liquid faster and improve the heating efficiency.

[0046] Further, such as Figure 2 and Figure 3As shown, one end of the heat pipe 10 is electrically connected to a conductive rod 13, a motor 14 and a safety plug 15 are arranged inside the electric heater 3, the free end of the conductive rod 13 passes through the heating area 4 and the electric heater 3 and extends to the top of the safety plug 15, the safety plug 15 is provided with a sliding slot 16, and the free end of the conductive rod 13 is elastically provided with an electrical head 17, which is inserted into the sliding slot 16;

[0047] An electromagnet 18 is fixedly connected to one side of the electric heater 3 near the sliding slot 16 , and the electromagnet 18 is electrically connected to the motor 14 .

[0048] Further, such as Figure 1 and Figure 2 As shown, the terminal control platform 12 is provided with a temperature control terminal 19, a magnetic force adjustment knob 20, a stirrer control switch 21 and a heater control switch 22. The temperature control terminal 19 is electrically connected to the motor 14, and the magnetic force adjustment knob 20 is electrically connected to the magnetic stirrer 2. The speed of the magnetic stirrer 2 is adjusted by turning the magnetic force adjustment knob 20. The stirrer control switch 21 and the heater control switch 22 are electrically connected to the magnetic stirrer 2 and the temperature control terminal 19, respectively. The staff can directly press the stirrer control switch 21 and the heater control switch 22 to turn off the magnetic stirrer 2 and the temperature control terminal 19, which simplifies the closing steps.

[0049] When in use, the heating temperature of the heating zone 4 is adjusted through the temperature control terminal 19. During the heating process, when the liquid temperature in the heating zone 4 reaches the set temperature, the temperature control terminal 19 controls the motor 14 to energize the electromagnet 18. After the electromagnet 18 is energized, suction is generated to adsorb the electrical head 17 out of the sliding slot 16. At this time, the heat pipe 10 stops heating. When the liquid temperature in the heating zone 4 is lower than the set temperature, the temperature control terminal 19 controls the motor 14 to stop energizing the electromagnet 18. At this time, the electromagnet 18 loses its adsorption force on the electrical head 17, and the electrical head 17 is reset back to the sliding slot 16. At this time, the heat pipe 10 continues to heat.

[0050] Embodiment 2

[0051] like Figure 1-Figure 5 As shown, this embodiment is improved on the basis of the first embodiment as follows: Further, as Figure 2 and Figure 4As shown, the cold source conduction tank 11 is a metal conduit 23, and two groups of refrigeration zones 5 are provided, and are respectively located on both sides of the heating zone 4. Multiple metal conduits 23 are installed in the two groups of refrigeration zones 5, and the multiple metal conduits 23 are all provided with thermal conductive plates 43, and the thermal conductive plates 43 penetrate the heating zone 4 and are connected with the inside of the heating zone 4, and the multiple metal conduits 23 in each group of refrigeration zones 5 are interconnected, and a cold source discharge pipe 24 and a cold source discharge pipe 25 are respectively embedded on one side of the heating chassis 1, and the two metal conduits 23 at the edge of the same group of refrigeration zones 5 are respectively connected with the cold source discharge pipe 24 and the cold source discharge pipe 25, and the cold source can be discharged through the provided cold source discharge pipe 25, so that new cold source can be continuously discharged from the cold source discharge pipe 24 into the metal conduit 23, thereby improving the cooling efficiency;

[0052] A first connecting pipe 26 and a second connecting pipe 27 are arranged between the metal conduits 23 in the two groups of refrigeration zones 5, and the first connecting pipe 26 and the second connecting pipe 27 are connected to the two groups of metal conduits 23;

[0053] Furthermore, the first connecting pipe 26 and the cold source discharge pipe 24 are in the same vertical plane;

[0054] The second connecting pipe 27 and the cold source discharge pipe 25 are in the same vertical plane;

[0055] The first connecting pipe 26 is provided with an intake check valve 28, and the second connecting pipe 27 is provided with an exhaust check valve 29. The metal conduit 23 connected to the cold source discharge pipe 24 can transport the cold source through the first connecting pipe 26 to the metal conduit 23 in another group of refrigeration zones 5 under the action of the intake check valve 28. The metal conduit 23 in another group of refrigeration zones 5 can discharge the cold source through the second connecting pipe 27 into the metal conduit 23 connected to the cold source discharge pipe 25 under the action of the exhaust check valve 29, thus forming a cycle.

[0056] Specifically, when the liquid in the heating zone 4 needs to be cooled, the cold source discharge pipe 24 and the cold source exhaust pipe 25 are connected to the external cold source device, and the external cold source device discharges the cold source into the cold source discharge pipe 24, and the cold source is discharged into the metal conduit 23 in another group of refrigeration zones 5 through the air intake check valve 28. The temperature of the thermal conductive plate 43 drops rapidly, thereby cooling the liquid in the heating zone 4.

[0057] Embodiment 3

[0058] like Figure 1-Figure 5 As shown, this embodiment is improved on the basis of the first embodiment as follows: Further, as Figure 2 and Figure 5As shown, a plurality of limit slots 30 are provided on the top of the heating chassis 1, and the clamping structure includes a sealing plate 31, a clamping plate 32 and two cover plates 33. The bottom of the sealing plate 31 is fixedly connected with a limit plug rod 34 adapted to the limit slot 30. The staff can pull up the sealing plate 31 to facilitate cleaning of the interior of the heating zone 4. The sealing plate 31 is located directly above the heating zone 4. The sealing plate 31 is provided with a plug slot 35. The bottom of the plug slot 35 is provided with an abutment plate 36 extending inwardly. The two cover plates 33 are respectively fixedly connected to both sides of the sealing plate 31 and are located directly above the two refrigeration zones 5, sealing the refrigeration zones 5 to prevent dust from falling into the bottom of the refrigeration zones 5. An insertion port 38 connected to the insertion slot 35 is also provided on one side of the sealing plate 31. The clamping plate 32 is slidably connected to the insertion slot 35 through the insertion port 38. The bottom of the clamping plate 32 abuts against the abutment plate 36, so that the clamping plate 32 can be smoothly slidably set on the sealing plate 31. A communication port 39 is provided on the clamping plate 32.

[0059] Further, such as Figure 1 As shown, the sealing plate 31 is symmetrically provided with lifting grooves 40, which facilitates the staff to lift the sealing plate 31;

[0060] A handle 41 is fixedly connected to one side of the clamping plate 32, and an anti-slip pad 42 is fixedly connected to the inside of the communication port 39;

[0061] Furthermore, the clamping plate 32 has a variety of apertures. In order to improve the adaptability to different cup bodies, when in use, the staff can replace the clamping plates 32 of different calibers according to the cup bodies of different sizes. When replacing, just pull the handle 41 to pull out the clamping plate 32, which is simple and convenient. After the replacement is completed, the corresponding cup is placed in the connecting port 39. The anti-slip pad 42 can increase the friction between the cup and the clamping plate 32 and improve the stability. At the same time, after the cup is placed in the connecting port 39, the sealing plate 31, the clamping plate 32 and the cup can cover the top of the heating zone 4 to prevent liquid from splashing out and prevent the liquid in the heating zone 4 from being exposed to light, thereby further avoiding contamination.

[0062] In summary, the workflow of the utility model is:

[0063] When in use, the staff can replace different types of clamping plates 32 according to the cups of different sizes. After the replacement is completed, the cup containing the experimental liquid is placed in the connecting port 39;

[0064] The liquid adding pipe 7 is connected to the external liquid storage device, and the liquid can be added to the heating area 4 through the pump 8. After the liquid is added, the stirrer control switch 21 and the heater control switch 22 are turned on, and the heating temperature of the heating area 4 is adjusted through the temperature control terminal 19. The heat conducting pipe 10 starts to heat the liquid in the heating area 4, and then the experimental liquid in the cup is heated;

[0065] After the experiment, the cold source discharge pipe 24 and the cold source discharge pipe 25 are connected to the external cold source device. The external cold source device discharges the cold source into the cold source discharge pipe 24. The cold source is discharged into the metal conduit 23 in another group of refrigeration zones 5 through the air intake check valve 28. The temperature of the thermal conductive plate 43 drops rapidly, thereby cooling the liquid in the heating zone 4. After cooling, the cooled liquid in the heating zone 4 is discharged back into the external liquid storage device through the pump 8.

[0066] However, as known to those skilled in the art, the working principles and wiring methods of the magnetic stirrer 2, electric heater 3, pump 8, temperature sensor 9, final control platform 12, conductive rod 13, motor 14, electrical head 17, temperature control terminal 19, magnetic adjustment knob 20, stirrer control switch 21, heater control switch 22, intake check valve 28 and exhaust check valve 29 are commonplace and are conventional means or common knowledge, so they will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0067] The above different embodiments can be combined, replaced and used in conjunction with each other.

[0068] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another set of entities or operations, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0069] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wide temperature range constant temperature heating device, characterized in that: It comprises a heating box (1), a magnetic stirrer (2) and an electric heater (3), wherein the upper and lower ends of the heating box (1) are both open, and the heating box (1) is provided with a plurality of cavities inside and is divided into three parts, namely a heating area (4), a cooling area (5) and a power area (6); The bottom of the inner cavity of the heating zone (4) is connected to a liquid adding pipe (7), the free end of the liquid adding pipe (7) passes through the heating cabinet (1) and extends outside, and the outer wall of the pipe is connected to a pump (8) for controlling liquid addition or liquid discharge, and a temperature sensor (9) is installed in the heating zone (4); The refrigeration zone (5) is used to cool the heating zone (4); A magnetic stirrer (2) is installed in the power zone (6), the electric heater (3) is electrically connected to a heat pipe (10), the heat pipe (10) is located in the heating zone (4), a cold source conduction tank (11) is installed in the cooling zone (5), a clamping structure is provided on the heating chassis (1), and a bottom plate (37) is installed at the bottom of the heating chassis (1); A final control platform (12) is provided on one side of the heating cabinet (1), and the final control platform (12) is electrically connected to the temperature sensor (9), the magnetic stirrer (2) and the electric heater (3).

2. The wide temperature range constant temperature heating device according to claim 1, characterized in that: The heat conducting pipe (10) is annularly fixedly connected to the center of the bottom of the inner cavity of the heating zone (4), and the magnetic stirrer (2) in the power zone (6) is located directly below the heat conducting pipe (10).

3. The wide temperature range constant temperature heating device according to claim 2, characterized in that: One end of the heat-conducting tube (10) is electrically connected to a conductive rod (13); a motor (14) and a safety plug (15) are arranged inside the electric heater (3); a free end of the conductive rod (13) passes through the heating area (4) and the electric heater (3) and extends to just above the safety plug (15); a sliding slot (16) is arranged on the safety plug (15); an electrical head (17) is elastically arranged at the free end of the conductive rod (13); and the electrical head (17) is plugged into the sliding slot (16); An electromagnet (18) is fixedly connected to one side of the electric heater (3) close to the sliding slot (16), and the electromagnet (18) is electrically connected to the motor (14).

4. The wide temperature range constant temperature heating device according to claim 3, characterized in that: The terminal control platform (12) is provided with a temperature control terminal (19), a magnetic force adjustment knob (20), a stirrer control switch (21) and a heater control switch (22); the temperature control terminal (19) is electrically connected to the motor (14); the magnetic force adjustment knob (20) is electrically connected to the magnetic stirrer (2); and the stirrer control switch (21) and the heater control switch (22) are electrically connected to the magnetic stirrer (2) and the temperature control terminal (19), respectively.

5. The wide temperature range constant temperature heating device according to claim 1, characterized in that: The cold source conduction tank (11) is a metal conduit (23), and the refrigeration zone (5) is provided with two groups, and is respectively located on both sides of the heating zone (4). A plurality of metal conduits (23) are installed in each of the two groups of refrigeration zones (5), and the plurality of metal conduits (23) are each provided with a thermal conductive sheet (43), and the thermal conductive sheet (43) penetrates the heating zone (4) and is connected to the interior of the heating zone (4), and the plurality of metal conduits (23) in each group of refrigeration zones (5) are interconnected, and a cold source discharge pipe (24) and a cold source discharge pipe (25) are respectively embedded on one side of the heating chassis (1), and the two metal conduits (23) at the edge of the refrigeration zone (5) of the same group are respectively connected to the cold source discharge pipe (24) and the cold source discharge pipe (25); A first connecting pipe (26) and a second connecting pipe (27) are provided between the two groups of metal conduits (23) in the refrigeration zone (5); the first connecting pipe (26) and the second connecting pipe (27) connect the two groups of metal conduits (23).

6. The wide temperature range constant temperature heating device according to claim 5, characterized in that: The first connecting pipe (26) and the cold source discharge pipe (24) are located in the same vertical plane; The second connecting pipe (27) and the cold source discharge pipe (25) are located in the same vertical plane; The first connecting pipe (26) is provided with an intake check valve (28), and the second connecting pipe (27) is provided with an exhaust check valve (29).

7. The wide temperature range constant temperature heating device according to claim 1, characterized in that: The top of the heating cabinet (1) is provided with a plurality of limit slots (30); the clamping structure comprises a sealing plate (31), a clamping plate (32) and two cover plates (33); a limit plug rod (34) adapted to the limit slot (30) is fixedly connected to the bottom of the sealing plate (31); the sealing plate (31) is located directly above the heating zone (4); the sealing plate (31) is provided with a plug slot (35); a contact plate (35) extends inwardly from the bottom of the plug slot (35); 36), the two cover plates (33) are respectively fixedly connected to the two sides of the sealing plate (31) and are located directly above the two refrigeration zones (5), one side of the sealing plate (31) is also provided with an insertion port (38) connected to the insertion slot (35), the clamping plate (32) is slidably connected to the insertion slot (35) through the insertion port (38), the bottom of the clamping plate (32) is in abutment with the abutment plate (36), and the clamping plate (32) is provided with a communication port (39).

8. The wide temperature range constant temperature heating device according to claim 7, characterized in that: The sealing plate (31) is symmetrically provided with lifting grooves (40); A handle (41) is fixedly connected to one side of the clamping plate (32), and an anti-slip pad (42) is fixedly connected to the inside of the communication port (39).

9. The wide temperature range constant temperature heating device according to claim 7, characterized in that: The clamping plate (32) has communication openings (39) with various apertures.

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