Split type electromagnetic heating electric hot plate for laboratory

Abstract

The invention discloses a split type electromagnetic heating electric hot plate for a laboratory, and relates to the technical field of laboratory heating equipment, the split type electromagnetic heating electric hot plate comprises a ventilation cabinet, and a heating assembly is arranged in the ventilation cabinet; according to the electric heating plate, the heating assembly is arranged, the split type design is adopted, the electromagnetic heating base is arranged in the non-corrosive environment of the containing cavity, only the heating panel is exposed to the operation cavity, corrosion of corrosive gas to core components is isolated from the source, the service life of equipment is effectively prolonged, the heating panel is embedded in the installation hole and is flush with the operation table top, and therefore the service life of the electric heating plate is prolonged. By means of the locking structure of the inserting rod, the adapting pipe and the sleeve driving clamping block, fixing can be completed only by rotating the sleeve during installation, dismounting does not need special tools, the maintenance efficiency is effectively improved, the annular fluororubber sealing ring is matched, corrosive gas is prevented from overflowing, and the safety of the test is improved. The sealing reliability is far better than that of a simple gasket in the prior art, equipment is protected, and the experiment environment is kept clean.

Description

Technical Field

[0001] This invention relates to laboratory heating equipment technology, specifically to a split-type electromagnetic heating plate for laboratory use. Background Technology

[0002] Laboratory heating plates are widely used and conventional heating devices in laboratories, typically installed inside fume hoods. They are primarily used to provide a stable heat source for various chemical reactions, such as isothermal reactions of solutions, sample drying and pretreatment, reagent preheating, and small-scale synthesis experiments. Their core structure includes a flat heating surface, usually made of corrosion-resistant stainless steel or coated with an anti-corrosion coating. They can adjust the temperature according to experimental needs, providing precise heat output and meeting the basic requirements for heating stability and safety in different experiments. They are one of the fundamental pieces of equipment in experiments in chemistry, biology, materials science, and other fields.

[0003] Existing laboratory heating plates mostly adopt an integrated design, with the heating element and panel integrated in the corrosive environment of the fume hood. The acidic and alkaline corrosive gases generated during the experiment will directly contact the heating element, terminals and other core components, causing oxidation of the component surface and damage to the insulation layer, which in turn leads to short circuits, power attenuation and other faults, significantly shortening the service life of the equipment. At the same time, the integrated structure makes the heating panel generally protrude from the work surface, and it is easy to bump the edge of the panel when frequently picking up and putting down samples. This not only increases the risk of experimental errors, but may also cause samples to spill. Moreover, maintenance requires disassembling the entire equipment, making it difficult to replace damaged parts individually. The operation is complicated and time-consuming, and the maintenance cost is high, making it difficult to meet the high-frequency and high-precision use requirements of laboratories. Summary of the Invention

[0004] The purpose of this invention is to provide a split-type electromagnetic heating plate for laboratory use, in order to solve the problems of existing laboratory heating plates, which mostly adopt an integrated design, with the heating element and panel integrated in a ventilation cabinet, making them susceptible to contamination, easy to bump against the panel edges, and difficult to maintain.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a split-type electromagnetic heating plate for laboratory use, including a ventilation cabinet, an operating table provided inside the ventilation cabinet, mounting holes and grooves provided on the operating table, the interior of the ventilation cabinet being divided into an operating chamber and a receiving chamber by the operating table, cabinet doors symmetrically provided on the ventilation cabinet, the two cabinet doors completely covering the opening of the receiving chamber, and a heating component provided inside the ventilation cabinet;

[0006] The heating assembly includes a heating panel embedded in a mounting hole. A rod is provided at the bottom of the heating panel, and a slot is provided on the rod. An electromagnetic heating base is provided in the receiving cavity. A control panel and a switch are provided on the electromagnetic heating base. A receiving pipe is provided at the top of the electromagnetic heating base. A slot is provided on the receiving pipe, and a locking plate is provided in the slot. A locking block is provided on the inner side of the locking plate. A locking member is provided on the outside of the receiving pipe. The locking member is used to press the locking plate and drive the locking block on the locking plate to engage with the teeth of the slot.

[0007] Furthermore, the insertion rod is inserted into the receiving pipe, and multiple insertion rods and receiving pipes are provided and arranged symmetrically. Two slot strips, slots, card plates and card blocks are provided and arranged symmetrically.

[0008] Furthermore, the locking member includes a sleeve threaded to the outside of the receiving tube, and an elastic element is provided between the sleeve and the electromagnetic heating base.

[0009] Furthermore, the inner side of the sleeve is in contact with the outer side of the card plate, and the elastic element is a cylindrical helical spring, with its two ends connected to the bottom of the sleeve and the top of the electromagnetic heating base, respectively.

[0010] Furthermore, an adjustment assembly is provided inside the receiving cavity. The adjustment assembly includes a guide plate fixedly connected to the bottom of the operating table, a T-shaped plate slidably connected to the guide plate, a slot provided on the T-shaped plate, a side plate fixedly connected to the inside of the receiving cavity, and a threaded rod rotatably connected to the side plate.

[0011] Furthermore, the adjustment assembly also includes a connecting seat fixedly connected to the bottom of the threaded rod, a transmission belt is provided on the connecting seat, and a rocker arm is fixedly connected to the bottom of the connecting seat.

[0012] Furthermore, the guide plate is disposed in the slot, one end of the T-shaped plate near the inner side of the receiving cavity is threadedly connected to the threaded rod, the other end of the T-shaped plate away from the inner side of the receiving cavity abuts against the bottom of the electromagnetic heating base, and the top of the threaded rod is rotatably connected to the bottom of the operating table. Two guide plates, T-shaped plates, side plates, threaded rods and connecting seats are provided and arranged symmetrically, and the two ends of the transmission belt are respectively sleeved on the two connecting seats.

[0013] Furthermore, the heating panel includes a three-layer composite structure, which consists of a heat-conducting layer, a heat-spreading layer, and an insulating layer from top to bottom.

[0014] Furthermore, the heat-conducting layer, the heat-spreading layer, and the insulating layer are fixed together by a hot rolling composite process. The heat-conducting layer is made of stainless steel, the heat-spreading layer is made of aluminum alloy, and the insulating layer is a high-temperature resistant ceramic coating.

[0015] Furthermore, an annular fluororubber sealing ring is provided in the groove, and the annular fluororubber sealing ring is adapted to the gap between the heating panel and the mounting hole.

[0016] Compared with existing technologies, the present invention provides a split-type electromagnetic heating plate for laboratory use. By setting up heating components and adopting a split design, the electromagnetic heating base is placed in a non-corrosive environment within the receiving cavity, with only the heating panel exposed to the operating cavity. This fundamentally isolates corrosive gases from eroding the core components, effectively extending the service life of the equipment. The heating panel is embedded in the mounting hole and flush with the operating table surface, eliminating height differences and eliminating the risk of collision when handling samples, thus reducing the experimental error rate. Through the locking structure of the insertion rod, receiving tube, and sleeve driving block, installation can be completed simply by rotating the sleeve, and disassembly requires no professional tools, effectively improving maintenance efficiency. Combined with an annular fluororubber sealing ring, it prevents the leakage of corrosive gases, and the sealing reliability far exceeds that of simple gaskets in existing technologies, protecting the equipment and ensuring a clean experimental environment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is an exploded view of the structure provided in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0020] Figure 3 A cross-sectional view provided for an embodiment of the present invention;

[0021] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0022] Figure 5 This is an exploded view of a portion of the heating assembly structure provided in an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the adjustment component provided in an embodiment of the present invention;

[0024] Figure 7 A cross-sectional view of the adjustment component provided in an embodiment of the present invention;

[0025] Figure 8 This is a cross-sectional view of the heating panel provided in an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Ventilation cabinet; 11. Work surface; 111. Mounting hole; 112. Groove; 12. Annular fluororubber sealing ring; 13. Operating cavity; 14. Receiving cavity; 15. Cabinet door; 2. Heating assembly; 21. Heating panel; 211. Heat-conducting layer; 212. Heat-spreading layer; 213. Insulation layer; 22. Insert rod; 221. Slot strip; 23. Electromagnetic heating base; 231. Control panel; 232. Switch; 24. Receiving pipe; 241. Groove; 25. Card plate; 251. Card block; 26. Locking component; 261. Sleeve; 262. Elastic component; 3. Adjustment assembly; 31. Guide plate; 32. T-shaped plate; 321. Slot; 33. Side plate; 34. Threaded rod; 35. Connecting seat; 36. Drive belt; 37. Rocker arm. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] As attached Figure 1 To be continued Figure 8 As shown:

[0030] Example 1:

[0031] This invention provides a split-type electromagnetic heating plate for laboratory use, including a fume hood 1. The fume hood 1 has an operating surface 11 with mounting holes 111 and grooves 112. The interior of the fume hood 1 is divided into an operating chamber 13 and a receiving chamber 14 by the operating surface 11. The fume hood 1 has symmetrically arranged cabinet doors 15, which completely cover the opening of the receiving chamber 14. A heating component 2 is installed inside the fume hood 1. The fume hood 1 provides a mounting base for all components and, through the partitioned chambers, creates a corrosive environment. Physical isolation from the non-corrosive environment protects core components such as the electromagnetic heating base 23. The top of the fume hood 1 is equipped with ventilation ducts, and an external fan powerfully exhausts the gas inside the operating chamber 13 to the outside. The fume hood 1 also features a pull-down glass door for opening or sealing the operating chamber 13 to prevent the leakage of corrosive gases. The operating table 11 serves as the load-bearing surface for experimental operations and is also a key structural element separating the chambers. It has mounting holes 111 and grooves 112 for embedding the heating panel 21 and installing sealing components, respectively, ensuring structural integrity. The mounting hole 111, through its inlay with the heating panel 21, ensures that the upper surface of the heating panel 21 is flush with the operating table 11, and provides stable support for the heating panel 21. The groove 112 serves as the mounting slot for the annular fluororubber sealing ring 12. By precisely matching the size of the annular fluororubber sealing ring 12, it ensures that the annular fluororubber sealing ring 12 will not shift or fall off after installation, thus ensuring a sealing effect. The operating cavity 13 is the experimental operation area, used to place the sample container to be heated. It is in direct contact with the corrosive gases generated during the experiment and is a corrosive environment area that requires key protection. The receiving cavity 14 is a non-corrosive protection area, used to install core components such as the electromagnetic heating base 23 and the adjustment component 3, keeping them away from corrosive gases to avoid corrosion damage. It also provides operating space for component maintenance. The cabinet door 15 serves as a protective door for the receiving cavity 14, completely covering the opening of the receiving cavity 14 to prevent dust and debris from entering the receiving cavity 14 and contaminating the components. It also provides a closing and opening function during maintenance to ensure operational safety. The heating component is used to integrate the heating panel 21 and the electromagnetic heating base 23, and achieves heat generation and transfer through the principle of electromagnetic induction.

[0032] Heating assembly 2 includes a heating panel 21 embedded in mounting hole 111. A rod 22 is provided at the bottom of the heating panel 21, and a slot 221 is provided on the rod 22. An electromagnetic heating base 23 is provided in receiving cavity 14, and a control panel 231 and a switch 232 are provided on the electromagnetic heating base 23. A receiving pipe 24 is provided at the top of the electromagnetic heating base 23, and a slot 241 is provided on the receiving pipe 24. A retaining plate 25 is provided in the slot 241, and a retaining block 251 is provided on the inner side of the retaining plate 25. A locking member 26 is provided on the outside of the receiving pipe 24. The locking member 26 is used to press the retaining plate 25 and drive the retaining block 251 on the retaining plate 25 to engage. The heating panel 21, connected within the teeth of the slot strip 221, is a component that directly supports the sample container and achieves uniform heating. Its three-layer composite structure meets the requirements of corrosion resistance, uniform heating, and insulation, serving as a key carrier for heat transfer. The insertion rod 22 acts as a connecting bridge between the heating panel 21 and the electromagnetic heating base 23. It achieves initial positioning of both by inserting into the receiving tube 24, providing a structural basis for subsequent locking. The toothed structure of the slot strip 221 on the insertion rod 22, through its engagement with the locking block 251, secures the heating panel 21 and the electromagnetic heating base 23, ensuring their relative positional stability. The electromagnetic heating base 23 generates high frequency power when energized. The alternating magnetic field provides the energy source for the induced heating of the heat-conducting layer 211 of the heating panel 21. The control panel 231 serves as a parameter adjustment and control interface, used to set parameters such as heating temperature and power, and to provide real-time feedback on the equipment's operating status, achieving precise control of the heating process. The switch 232 is a device start / stop control component, used to quickly turn the electromagnetic heating base 23 on or off, ensuring convenient operation and flexibility in the experimental process. The receiving pipe 24 is a mating component for the insertion rod 22, providing insertion space for the insertion rod 22. Initial positioning is achieved through clearance fitting with the insertion rod 22, while also providing mounting support for the clamping plate 25 and the clamping block 251. The slot 241 is an opening structure formed on the receiving pipe 24 for installing the clamping plate 25, providing space for the movement of the clamping plate 25, ensuring that the clamping plate 25 can swing flexibly within the slot 241 to achieve the engagement or disengagement of the clamping block 251. The clamping plate 25 drives the clamping block 251 to move by receiving the squeezing force of the sleeve 261. The clamping block 251 fixes the insert rod 22 and the receiving pipe 24 by embedding into the teeth of the clamping groove 221, thereby locking the relative position of the heating panel 21 and the electromagnetic heating base 23. The locking member 26 provides power for the engagement of the clamping block 251 by squeezing the clamping plate 25, ensuring that the locking state is stable and reliable.

[0033] The insertion rod 22 is inserted into the receiving pipe 24. Multiple insertion rods 22 and multiple receiving pipes 24 are provided and are arranged symmetrically. Two slot strips 221, slots 241, card plates 25 and card blocks 251 are provided and are arranged symmetrically.

[0034] The locking component 26 includes a sleeve 261 threaded to the outside of the receiving tube 24. An elastic element 262 is provided between the sleeve 261 and the electromagnetic heating base 23. The sleeve 261 moves up and down when rotated through the threaded connection with the receiving tube 24, thereby generating a squeezing or releasing force on the clamping plate 25. The elastic element 262 is a cylindrical helical spring with its two ends connected to the bottom of the sleeve 261 and the top of the electromagnetic heating base 23, respectively. When the sleeve 261 moves downward, it stores elastic potential energy and provides reset power when unlocking, assisting the sleeve 261 to return to its original position. It also provides thrust to the sleeve 261 at all times to prevent the sleeve 261 from loosening.

[0035] The inner side of the sleeve 261 is in contact with the outer side of the clamping plate 25. The elastic element 262 is a cylindrical helical spring. The two ends of the elastic element 262 are respectively connected to the bottom of the sleeve 261 and the top of the electromagnetic heating base 23.

[0036] Working principle: The heating panel 21 is embedded in the mounting hole 111 of the operating table 11, ensuring that the upper surface of the heating panel 21 is flush with the operating table 11, completing the initial positioning. The electromagnetic heating base 23 is placed in the receiving cavity 14, with its top receiving tube 24 aligned with the bottom insertion rod 22 of the heating panel 21. The sleeve 261 outside the receiving tube 24 is rotated clockwise. Since the sleeve 261 is threadedly connected to the receiving tube 24, the sleeve 261 moves upward along the receiving tube 24. The inner side of the sleeve 261 presses against the clamping plate 25, causing the clamping plate 25 to swing inward in the slot 241, driving the clamping block 251 on the inner side of the clamping plate 25 to engage with the teeth of the clamping groove 221 of the insertion rod 22, thus realizing the connection between the heating panel 21 and the electromagnetic heating base 23. After securing the sample container 3, turn on the switch 232 on the electromagnetic heating base 23 and set the heating temperature, power and other parameters through the control panel 231. After the electromagnetic heating base 23 is powered on, it generates a high-frequency alternating magnetic field. The magnetic field penetrates the air gap and acts on the heating panel 21, generating eddy currents and generating heat, thereby heating the sample container. After the experiment, turn off the switch 232 and rotate the sleeve 261 counterclockwise. The sleeve 261 moves downward along the receiving tube 24, releasing the squeezing force on the clamping plate 25. The elastic element 262 restores its elastic deformation, pushing the sleeve 261 to return to its original position. The clamping plate 25 swings outward under its own elastic action, and the clamping block 251 disengages from the clamping groove strip 221. The heating panel 21 can then be taken out upward for cleaning or maintenance.

[0037] By setting up the heating component 2 and adopting a split design, the electromagnetic heating base 23 is placed in the non-corrosive environment of the receiving cavity 14, with only the heating panel 21 exposed to the operating cavity 13. This effectively isolates the core components from corrosive gases, extending the service life of the equipment. The heating panel 21 is embedded in the mounting hole 111 and is flush with the operating table 11, eliminating height differences and eliminating the risk of collision when picking up or placing samples, thus reducing the experimental error rate. The locking structure of the drive block 251 is achieved through the insertion rod 22, the receiving pipe 24, and the sleeve 261. During installation, only the sleeve 261 needs to be rotated to complete the fixation. Disassembly does not require professional tools, effectively improving maintenance efficiency. Combined with the annular fluororubber sealing ring 12, it prevents the leakage of corrosive gases, and the sealing reliability far exceeds that of simple gaskets in the existing technology, protecting the equipment and ensuring a clean experimental environment.

[0038] Example 2:

[0039] As shown in the attached figures, this embodiment is basically the same as the previous embodiment, except that an adjustment component 3 is provided inside the receiving cavity 14. The adjustment component 3 includes a guide plate 31 fixedly connected to the bottom of the operating table 11, a T-shaped plate 32 slidably connected to the guide plate 31, and a slot 321 provided on the T-shaped plate 32. A side plate 33 is fixedly connected to the inside of the receiving cavity 14, and a threaded rod 34 is rotatably connected to the side plate 33. The adjustment component 3 is used to adjust the distance between the heating panel 21 and the electromagnetic heating base 23, and at the same time provides stable support for the electromagnetic heating base 23 to prevent it from falling off. The guide plate 31 is fixed to the bottom of the operating table 11 and restricts the movement direction of the T-shaped plate 32 by cooperating with the slot 321 of the T-shaped plate 32. The T-shaped plate 32 is designed to move vertically up and down. One end of the T-shaped plate 32 is threadedly connected to the threaded rod 34, and the other end abuts against the bottom of the electromagnetic heating seat 23. The T-shaped plate 32 moves up and down to adjust the position of the electromagnetic heating seat 23 and bears the weight of the electromagnetic heating seat 23 to prevent it from falling off. The slot 321 is a groove structure opened on the T-shaped plate 32, which is precisely matched with the guide plate 31 to provide a guide channel for the movement of the T-shaped plate 32 and ensures that the movement is smooth and without deviation. The side plate 33 is fixed inside the receiving cavity 14 and provides a rotation fulcrum for the threaded rod 34 to ensure that the threaded rod 34 is stable and without shaking when it rotates. The rotation of the threaded rod 34 is converted into the vertical linear motion of the T-shaped plate 32, which is the power transmission carrier for realizing the spacing adjustment.

[0040] The adjustment assembly 3 also includes a connecting seat 35 fixedly connected to the bottom of the threaded rod 34. A transmission belt 36 is provided on the connecting seat 35, and a rocker arm 37 is fixedly connected to the bottom of the connecting seat 35. The connecting seat 35 is fixed to the bottom of the threaded rod 34 and is used to install the transmission belt 36 to realize the synchronous rotation of the two threaded rods 34. The transmission belt 36 is sleeved on the two connecting seats 35 to ensure that when one connecting seat 35 rotates, it drives the other connecting seat 35 to rotate synchronously, thereby realizing the synchronous movement of the two threaded rods 34. The rocker arm 37 is fixed to the bottom of one connecting seat 35 and provides power by manual rotation to drive the connecting seat 35, the transmission belt 36 and the threaded rod 34 to move, realizing the manual operation of spacing adjustment.

[0041] The guide plate 31 is set in the slot 321. The end of the T-shaped plate 32 near the inner side of the receiving cavity 14 is threaded to the threaded rod 34. The end of the T-shaped plate 32 away from the inner side of the receiving cavity 14 abuts against the bottom of the electromagnetic heating seat 23. The top of the threaded rod 34 is rotatably connected to the bottom of the operating table 11. There are two guide plates 31, T-shaped plates 32, side plates 33, threaded rods 34 and connecting seats 35, which are arranged symmetrically. The two ends of the transmission belt 36 are respectively sleeved on the two connecting seats 35.

[0042] Working principle: To adjust the distance between the heating panel 21 and the electromagnetic heating base 23, first rotate the sleeves 261 of all locking components 26 counterclockwise to disengage the locking block 251 from the slot strip 221, releasing the locking of the insertion rod 22 and the receiving tube 24. The insertion rod 22 can then move freely up and down within the receiving tube 24. Rotate the rocker arm 37 at the bottom of the receiving cavity 14. The rocker arm 37 drives the one-side connecting seat 35, which is fixedly connected to it, to rotate. Through the transmission belt 36 sleeved on the two connecting seats 35, the other side connecting seat 35 rotates synchronously, thereby causing the two threaded rods 34 to rotate synchronously on the side plate 33. Since one end of the T-shaped plate 32 is threadedly connected to the screw... On the threaded rod 34, the slot 321 of the T-shaped plate 32 slides with the guide plate 31. When the threaded rod 34 rotates, it is converted into the vertical linear motion of the T-shaped plate 32. The end of the T-shaped plate 32 away from the inner side of the receiving cavity 14 abuts against the bottom of the electromagnetic heating base 23, driving the electromagnetic heating base 23 to move up and down synchronously, thereby adjusting the distance between it and the heating panel 21. After the distance is adjusted to the target position, stop rotating the rocker arm 37, rotate the sleeve 261 clockwise, and squeeze the card plate 25 again, so that the card block 251 is engaged in the teeth of the corresponding position of the card slot strip 221, and re-lock the relative position of the heating panel 21 and the electromagnetic heating base 23, thus completing the distance adjustment.

[0043] By linking the rocker arm 37 and the transmission belt 36 with the double threaded rod 34, and cooperating with the guide plate 31 to oriented the T-shaped plate 32, the distance between the electromagnetic heating base 23 and the heating panel 21 can be manually and steplessly adjusted. This adapts to panel thickness deviations and heating requirements of different samples, ensuring stable magnetic field induction efficiency. At the same time, the T-shaped plate 32 continuously abuts against the bottom of the electromagnetic heating base 23, bearing its weight to prevent it from falling off and avoiding component shaking that could affect heating. The adjustment does not require disassembling the equipment and can be completed manually by a single person. This improves the adaptability of the equipment, reduces the complexity of operation, ensures the efficient progress of high-frequency experiments, and adapts to diverse heating scenarios.

[0044] Example 3:

[0045] As shown in the attached figure, this embodiment is basically the same as the previous embodiment, except that the heating panel 21 includes a three-layer composite structure. The three-layer composite structure consists of a heat-conducting layer 211, a heat-spreading layer 212, and an insulating layer 213 from top to bottom. The heat-conducting layer 211, as the surface structure of the heating panel 21, is made of stainless steel and has excellent thermal conductivity and corrosion resistance. It directly senses the magnetic field of the electromagnetic heating base 23 to generate heat, while also withstanding the pressure of the sample container and the corrosive environment. The heat-spreading layer 212, as the middle layer of the heating panel 21, is made of aluminum alloy. Utilizing the high thermal conductivity of aluminum alloy, it quickly conducts and evenly distributes the local heat generated by the heat-conducting layer 211, avoiding "hot spots" on the heating panel 21 and ensuring uniform heating of the sample. The insulating layer 213, as the bottom structure of the heating panel 21, is a high-temperature resistant ceramic coating. Its core function is to block the reverse transfer of heat to the electromagnetic heating base 23, preventing the electromagnetic heating base 23 from overheating, and simultaneously achieving electrical insulation to prevent the risk of leakage.

[0046] The heat-conducting layer 211, the heat-spreading layer 212, and the insulating layer 213 are fixed together by a hot rolling composite process. The heat-conducting layer 211 is made of stainless steel, the heat-spreading layer 212 is made of aluminum alloy, and the insulating layer 213 is a high-temperature resistant ceramic coating.

[0047] Working principle: After the electromagnetic heating base 23 is energized, the internal coil generates a high-frequency alternating magnetic field. The magnetic field passes through the air gap between the receiving cavity 14 and the heating panel 21, and acts directionally on the heat-conducting layer 211 of the heating panel 21. Under the electromagnetic induction of the alternating magnetic field, a large number of closed eddy currents are formed inside the heat-conducting layer 211. The eddy currents are hindered by the metal resistance, converting electrical energy into heat energy, causing the heat-conducting layer 211 to heat up as a whole. The heat generated by the heat-conducting layer 211 is quickly transferred to the middle heat-spreading layer 212. Since the thermal conductivity of aluminum alloy is much higher than that of stainless steel, the heat is absorbed in the heat-spreading layer. Rapid diffusion within 212 eliminates potential localized temperature differences in the heat-conducting layer 211, achieving overall temperature uniformity in the heating panel 21. The bottom insulating layer 213 blocks heat from being transferred in the reverse direction to the electromagnetic heating base 23, preventing damage to the electromagnetic heating base 23 due to overheating. At the same time, the ceramic coating has excellent electrical insulation properties, preventing eddy currents in the heat-conducting layer 211 from being conducted to the electromagnetic heating base 23, thus avoiding the risk of leakage. After the temperature of the heat-conducting layer 211 becomes uniform, the sample container placed on it receives heat through thermal conduction, achieving uniform heating of the sample and ensuring the stability of the experimental reaction.

[0048] The three-layer composite panel structure balances heating uniformity, corrosion resistance, and safety. The outer stainless steel heat-conducting layer 211 is resistant to corrosive gases and can efficiently sense magnetic fields to generate heat. The middle aluminum alloy heat-dissipating layer 212, with its high thermal conductivity, quickly diffuses local heat, eliminating "hot spots" and solving the problem of experimental data deviation caused by uneven heating of existing single-layer panels. The bottom ceramic insulating layer 213 blocks reverse heat transfer to protect the electromagnetic heating base 23, while also achieving electrical insulation to prevent leakage. The three layers are hot-rolled and seamlessly bonded to ensure heat transfer efficiency, extend panel life, and fully meet the high-precision, long-cycle heating experiment requirements of laboratories.

[0049] Example 4:

[0050] As shown in the attached figure, this embodiment is basically the same as the previous embodiment, except that an annular fluororubber sealing ring 12 is provided in the groove 112. The annular fluororubber sealing ring 12 is adapted to the gap between the heating panel 21 and the mounting hole 111. The annular fluororubber sealing ring 12 is used to fill the gap between the heating panel 21 and the mounting hole 111, blocking the corrosive gas in the operating chamber 13 from overflowing outward, and at the same time preventing external dust from entering the operating chamber 13 or the receiving chamber 14, thus avoiding component contamination.

[0051] Working principle: After the heating panel 21 is embedded in the mounting hole 111, the gap between its side wall and the mounting hole 111 is completely filled by the annular fluororubber sealing ring 12. The annular fluororubber sealing ring 12 is slightly compressed under its own elasticity, forming a gapless sealing surface with the side wall of the heating panel 21 and the inner wall of the groove 112. During the experiment, the corrosive gas generated in the operating cavity 13 is blocked by the sealing surface and cannot overflow from the mounting gap into the receiving cavity 14, thus avoiding corrosion of components such as the electromagnetic heating base 23 and the adjustment component 3. At the same time, dust and debris in the external environment are also blocked by the sealing surface and cannot enter the operating cavity 13 or the receiving cavity 14, preventing component contamination and interference with the experimental environment.

[0052] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A split-type electromagnetic heating plate for laboratory use, comprising a ventilated cabinet (1), characterized in that, The ventilation cabinet (1) is provided with an operating table (11), and the operating table (11) is provided with mounting holes (111) and grooves (112). The interior of the ventilation cabinet (1) is divided into an operating chamber (13) and a receiving chamber (14) by the operating table (11). The ventilation cabinet (1) is symmetrically provided with cabinet doors (15), and the two cabinet doors (15) completely cover the opening of the receiving chamber (14). The ventilation cabinet (1) is provided with a heating component (2). The heating assembly (2) includes a heating panel (21) embedded in a mounting hole (111). A rod (22) is provided at the bottom of the heating panel (21). A slot strip (221) is provided on the rod (22). An electromagnetic heating base (23) is provided in the receiving cavity (14). A control panel (231) and a switch (232) are provided on the electromagnetic heating base (23). A receiving pipe (24) is provided at the top of the electromagnetic heating base (23). A slot (241) is provided on the receiving pipe (24). A card plate (25) is provided in the slot (241). A card block (251) is provided on the inner side of the card plate (25). A locking member (26) is provided on the outside of the receiving pipe (24). The locking member (26) is used to press the card plate (25) and drive the card block (251) on the card plate (25) to engage in the teeth of the slot strip (221).

2. The laboratory-use split-type electromagnetic heating plate according to claim 1, characterized in that, The insertion rod (22) is inserted into the receiving pipe (24). Both the insertion rod (22) and the receiving pipe (24) are provided in multiple and symmetrical arrangement. The slot strip (221), slot (241), card plate (25) and card block (251) are provided in two and symmetrical arrangement.

3. A split-type electromagnetic heating plate for laboratory use according to claim 1, characterized in that, The locking member (26) includes a sleeve (261) threaded to the outside of the receiving tube (24), and an elastic element (262) is provided between the sleeve (261) and the electromagnetic heating base (23).

4. A split-type electromagnetic heating plate for laboratory use according to claim 3, characterized in that, The inner side of the sleeve (261) is in contact with the outer side of the card plate (25), and the elastic element (262) is a cylindrical helical spring. The two ends of the elastic element (262) are respectively connected to the bottom of the sleeve (261) and the top of the electromagnetic heating base (23).

5. A split-type electromagnetic heating plate for laboratory use according to claim 1, characterized in that, An adjustment assembly (3) is provided inside the receiving cavity (14). The adjustment assembly (3) includes a guide plate (31) fixedly connected to the bottom of the operating table (11). A T-shaped plate (32) is slidably connected to the guide plate (31). A slot (321) is provided on the T-shaped plate (32). A side plate (33) is fixedly connected to the inside of the receiving cavity (14). A threaded rod (34) is rotatably connected to the side plate (33).

6. A split-type electromagnetic heating plate for laboratory use according to claim 5, characterized in that, The adjustment assembly (3) further includes a connecting seat (35) fixedly connected to the bottom of the threaded rod (34), a transmission belt (36) is provided on the connecting seat (35), and a rocker arm (37) is fixedly connected to the bottom of the connecting seat (35).

7. A split-type electromagnetic heating plate for laboratory use according to claim 6, characterized in that, The guide plate (31) is set in the slot (321). The end of the T-shaped plate (32) near the inner side of the receiving cavity (14) is threaded to the threaded rod (34). The end of the T-shaped plate (32) away from the inner side of the receiving cavity (14) abuts against the bottom of the electromagnetic heating seat (23). The top of the threaded rod (34) is rotatably connected to the bottom of the operating table (11). There are two of each of the guide plate (31), T-shaped plate (32), side plate (33), threaded rod (34) and connecting seat (35), and they are arranged symmetrically. The two ends of the transmission belt (36) are respectively sleeved on the two connecting seats (35).

8. A split-type electromagnetic heating plate for laboratory use according to claim 1, characterized in that, The heating panel (21) includes a three-layer composite structure, which consists of a heat-conducting layer (211), a heat-spreading layer (212), and an insulating layer (213) from top to bottom.

9. A split-type electromagnetic heating plate for laboratory use according to claim 8, characterized in that, The heat-conducting layer (211), the heat-spreading layer (212), and the insulating layer (213) are fixed together by a hot rolling composite process. The heat-conducting layer (211) is made of stainless steel, the heat-spreading layer (212) is made of aluminum alloy, and the insulating layer (213) is a high-temperature resistant ceramic coating.

10. A split-type electromagnetic heating plate for laboratory use according to claim 1, characterized in that, An annular fluororubber sealing ring (12) is provided in the groove (112), and the annular fluororubber sealing ring (12) is adapted to the gap between the heating panel (21) and the mounting hole (111).

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