A heating disc main body structure

Abstract

The utility model relates to a kind of heating disc main body structure, including lower cover and heat transfer plate, wherein the top surface of lower cover is equipped with mounting groove, mounting groove is equipped with support, support is equipped with heating component, and the bottom surface of lower cover is also equipped with electrical interface, heating component is electrically connected with electrical interface by wire, heat transfer plate is arranged above lower cover, and the bottom surface of heat transfer plate is simultaneously and closely combined with the top surface of lower cover and heating component and is connected by locking assembly Auxiliary sealing is formed;The application adopts modular design, so that each component can be quickly installed, combined with the automatic locking function of elastic member, the assembly process of heat transfer plate and lower cover only needs to be pushed into along guide groove and can be quickly locked, without the traditional multiple screw fastening step, greatly shorten assembly time.In maintenance, without disassembling entire heating disc, reduce maintenance difficulty and cost.

Description

Technical Field

[0001] This utility model relates to the field of waste recycling equipment technology, specifically to a heating plate main structure. Background Technology

[0002] Among various devices involving heating functions, the heating plate is a key component, and its performance and ease of maintenance directly affect the user experience and operating costs of the device.

[0003] Currently, most heating plates on the market have significant design flaws in their assembly and disassembly structures. Traditional heating plates are typically assembled entirely with screws. During maintenance, disassembling these screws is not only time-consuming and labor-intensive but also prone to problems such as stripped screws, leading to low maintenance efficiency and increased maintenance costs. Furthermore, when components of the heating plate are damaged and need replacement, the complex disassembly and assembly process makes replacement extremely difficult, extending equipment downtime and impacting production or usage schedules. In the manufacturing process, cumbersome disassembly and assembly steps reduce assembly efficiency, hindering large-scale production and rapid iterative upgrades. Utility Model Content

[0004] Based on the above description, this utility model provides a heating plate main body structure to solve the shortcomings of existing heating plate main body structures, which mostly use bolt structures for assembly, which are cumbersome to assemble and disassemble, affecting the assembly efficiency in the production process, and are cumbersome to disassemble and maintain later.

[0005] This utility model is achieved through the following technical solution: A heating plate main structure includes a lower cover plate and a heat transfer plate. The top surface of the lower cover plate is provided with a mounting groove, a bracket is provided in the mounting groove, a heating element is provided on the bracket, and the bottom surface of the lower cover plate is also provided with an electrical interface. The heating element is electrically connected to the electrical interface through a wire. The heat transfer plate is arranged above the lower cover plate, and the bottom surface of the heat transfer plate is in close contact with both the lower cover plate and the top surface of the heating element, and is sealed by a locking component.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the heating component includes an upper insulating plate and a lower insulating plate configured as an annular structure, and a heating tube disposed in the middle. The upper and lower insulating plates are provided with a fixing frame on their opposite sides. The surface of the fixing frame is provided with several U-shaped grooves. Multiple sets of heating tubes are arranged concentrically, and each heating tube is correspondingly snapped into a U-shaped groove. The two sets of fixing frames are attached to each other and locked together by bolts.

[0008] Furthermore, the top edge of the lower cover plate is provided with an annular sealing groove, which has multiple grooves arranged concentrically at intervals. A sealing insert is provided at the bottom edge of the heat transfer plate, which is fastened inside the sealing groove and leaves a gap with the side wall of the sealing groove.

[0009] Furthermore, the outer wall of the lower cover plate is provided with an injection hole, which extends inward and communicates with the sealing groove.

[0010] Furthermore, the locking assembly includes a guide groove on the inner side wall of the lower cover plate, a slider on the bottom surface of the heat transfer plate that is slidably inserted into the guide groove, a positioning hole on the side wall of the guide groove, an elastic element inside the positioning hole, and a through hole on the end face of the slider. When the lower cover plate and the heat transfer plate are tightly fitted, the positioning hole and the through hole are horizontally aligned, and the elastic element extends horizontally and inserts its front end into the through hole.

[0011] Furthermore, the elastic element includes a fixed end, which is rotatably mounted inside the through hole via a bearing structure, and a rod is provided at the center of the fixed end. The other end of the rod is provided with a locking end, and the locking end and the rod are movably assembled via a spline structure. The end of the locking end facing the center of the lower cover plate is set in an arc shape. A helical torsion spring is also provided between the fixed end and the locking end, and the helical torsion spring is fixedly connected to the locking end and the inner wall of the positioning hole respectively.

[0012] Furthermore, one end of the elastic element extends outward to the end face of the lower cover plate and is connected to an adjusting cap.

[0013] Furthermore, a spring rod is provided at the center of the bracket, and a connecting plate is provided at the top of the spring rod and is in close contact with the bottom surface of the heating element.

[0014] Furthermore, a groove is provided at the center of the top surface of the lower cover plate, and a temperature limiter is provided inside the groove, with the top of the temperature limiter protruding from the top surface of the heat transfer plate.

[0015] Furthermore, a heat preservation switch is also arranged at intervals on one side of the lower cover plate, and the heat preservation switch is electrically connected to the electrical interface through a relay.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: This application utilizes a modular design based on the existing heating plate structure, enabling rapid installation of various components. The sliding engagement design of the guide groove and slider, combined with the automatic locking function of the elastic element, allows the heat transfer plate and lower cover plate to be initially positioned simply by pushing them in along the guide groove. When the slider reaches the predetermined position, the elastic element automatically pops out and inserts into the through hole, achieving rapid locking without the need for traditional multi-screw fastening steps, significantly reducing assembly time. The heating element adopts a modular structure consisting of an upper insulating plate, a lower insulating plate, and a fixing frame, ensuring stable fixation of the heating element and facilitating the individual replacement of damaged heating elements or the entire heating element. During maintenance, simply releasing the locking component and removing the heat transfer plate allows for direct inspection or replacement of the heating element without disassembling the entire heating plate, reducing maintenance difficulty and cost. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the entire heating plate main structure in this embodiment; Figure 2 This is a schematic diagram of the lower cover plate in this embodiment; Figure 3 This is a schematic diagram of the heating component in this embodiment; Figure 4 This is a schematic diagram of the lower insulating plate and the fixing frame in this embodiment; Figure 5 This is a schematic diagram of the heat transfer plate in this embodiment; Figure 6 This is a schematic diagram of the elastic element in this embodiment; Labels: 1. Lower cover plate; 11. Mounting groove; 12. Bracket; 13. Spring rod; 14. Sealing groove; 15. Electrical interface; 2. Heat transfer plate; 21. Sealing insert plate; 3. Heating element; 31. Upper insulating plate; 32. Lower insulating plate; 33. Heating tube; 34. Fixing bracket; 4. Locking assembly; 41. Slide groove; 42. Sliding block; 43. Positioning hole; 44. Elastic element; 441. Fixed end; 442. Adjusting cap; 443. Insert rod; 444. Locking end; 445. Helical torsion spring; 45. Through hole; 5. Temperature limiter; 6. Thermal insulation switch. Detailed Implementation

[0018] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0020] Combination Figure 1-6 As shown, a heating plate main body structure includes: The lower cover plate 1 serves as the base for the entire heating plate. It is disc-shaped and has a mounting groove 11 on its top surface for auxiliary installation of other components. The heat transfer plate 2 is disposed on the top surface of the lower cover plate 1. It forms a seal by adhering to the top surface of the lower cover plate 1 and is used to transfer heat to the inner pot of the rice cooker or the inner pot of the coffee machine. The heating element 3 is fixedly installed in the mounting groove 11 of the lower cover plate 1 by the bracket 12, and its top surface is tightly attached to the bottom surface of the heat transfer plate 2 by the auxiliary support of the bracket 12. The locking assembly 4 is disposed between the heat transfer plate 2 and the lower cover plate 1 to lock the two together and enhance the sealing between them.

[0021] Specifically, in this embodiment, the heating plate is mainly used in rice cookers and coffee machines, etc., for cooking rice or water by electric heating. Therefore, the lower cover plate 1 should be directly fixed to the housing of the rice cooker or coffee machine by bolts to ensure its position is fixed.

[0022] In addition, the heating element 3 uses electric heating, so the heating wire carries not only high temperature but also a certain current. To improve the safety performance of the equipment, an upper insulating plate 31 and a lower insulating plate 32 (one of alumina ceramic plate, aluminum nitride ceramic plate, etc.) need to be added to both sides of the heating wire. The heating wire arranged between the upper insulating plate 31 and the lower insulating plate 32 is wrapped with a high temperature resistant material to form a heating tube 33, such as a metal tube (stainless steel, copper, etc.) or a ceramic tube (alumina, silicon carbide, etc.). The tube wall is filled with magnesium oxide powder to serve as a heat transfer insulation layer.

[0023] The purpose of using tubing to cover these heating wires is to facilitate the assembly and disassembly of the entire heating element. Therefore, a fixing bracket 34 is also arranged between the upper insulating plate 31 and the lower insulating plate 32. This fixing bracket 34 is, for example... Figure 3-4As shown, the heating element 3 consists of four rectangular pieces, each with a U-shaped groove. A mounting bracket 34 is also provided on the upper insulating plate 31. The rectangular pieces of this mounting bracket 34 are larger than those on the lower mounting bracket 34, and the bottom surface of the rectangular pieces on the upper insulating plate 31 has an insertion slot. This top-to-bottom splicing structure allows the mounting brackets 34 on the upper and lower insulating plates 31 and 32 to be snapped together. Two U-shaped grooves are used to secure the outer walls of the heating elements, thus pre-assembling multiple concentrically arranged heating elements. The heating element 3 adopts a modular structure composed of the upper insulating plate 31, lower insulating plate 32, and mounting bracket 34, ensuring stable fixation of the heating elements 33 and facilitating the individual replacement of damaged heating elements 33 or the entire heating element 3. During maintenance, only the locking component 4 needs to be released and the heat transfer plate 2 removed to directly inspect or replace the heating element 3 without disassembling the entire heating plate, reducing maintenance difficulty and cost.

[0024] The top edge of the lower cover plate 1 is also provided with an annular sealing groove 14. The sealing groove 14 is provided with multiple grooves arranged concentrically. The bottom edge of the heat transfer plate 2 is provided with a corresponding sealing insert plate 21. By inserting downwards, the heat transfer plate 2 and the top surface of the lower cover plate 1 are made to fit together. In order to ensure thermal conductivity and sealing performance, a certain gap should be reserved between the sealing insert plate 21 and the sealing groove 14. At the same time, an injection hole is provided on the side wall of the lower cover plate 1. The injection hole is connected to the internal sealing groove 14. After the splicing is completed, thermally conductive silicone grease is injected through the hole and sealed to fill the gap between the sealing groove 14 and the sealing insert plate 21. This not only forms a seal between the two, but also enhances the thermal conductivity between them.

[0025] The locking assembly 4 includes a guide groove 41 provided on the inner side wall of the lower cover plate 1. Multiple guide grooves 41 are provided and arranged in a circumferential array. The bottom surface of the heat transfer plate 2 is provided with a slider 42. Multiple sliders 42 are also provided and arranged in a circumferential array, so that each slider 42 can be slidably inserted into the guide groove 41. The side wall of the guide groove 41 is reserved with a positioning hole 43. The positioning hole 43 is equipped with an elastic element 44. The end face of the slider 42 is provided with a through hole 45. When the lower cover plate 1 and the heat transfer plate 2 are tightly fitted, the positioning hole 43 and the through hole 45 are horizontally aligned. Therefore, multiple elastic elements 44 extend horizontally at the same time and insert their front ends into the through hole 45, thereby locking and fixing the lower cover plate 1 and the heat transfer plate 2.

[0026] The elastic element 44 has the following structure: Figure 5As shown, it includes a fixed end 441, which is rotatably mounted inside the through hole 45 via a bearing structure. A rod 443 is provided at the center of the fixed end 441, and a locking end 444 is provided at the other end of the rod 443. The locking end 444 and the rod 443 are movably assembled via a spline structure. Therefore, when the rod 443 is twisted, the locking end 444 will deflect synchronously. Furthermore, the end of the locking end 444 facing the center of the lower cover plate 1 is set to be arc-shaped to ensure that when the slider 42 moves inside the slide groove 41, it can pass through the arc-shaped surface so that the locking end 444 faces inward.

[0027] Furthermore, a helical torsion spring 445 is provided between the fixed end 441 and the locking end 444. One end of the helical torsion spring 445 is fixedly connected to the side of the locking end 444 away from the slide groove 41, and the other end is fixedly connected to the stepped surface inside the positioning hole 43. Therefore, by twisting the helical torsion spring 445, it can be rotated and contracted to store elastic force. At this time, the fixed end 441 will be completely retracted into the positioning hole 43, which facilitates the disassembly of the lower cover plate 1 and the heat transfer plate 2. When assembling, it is only necessary to press the heat transfer plate 2 horizontally downward to make the positioning hole 43 and the through hole 45 horizontally aligned, thereby using the elastic element 44 for automatic locking. This structure adopts the sliding cooperation design of the guide slide groove 41 and the slider 42, combined with the automatic locking function of the elastic element 44, so that the assembly process of the heat transfer plate 2 and the lower cover plate 1 only needs to be pushed in along the guide groove to complete the initial positioning. When the slider 42 reaches the predetermined position, the elastic element 44 automatically pops out and inserts into the through hole 45, achieving quick locking without the need for traditional multi-screw fastening steps, significantly shortening assembly time. During disassembly, the locking can be released by rotating the elastic element 44 using the adjusting cap 442. The entire disassembly and assembly process can be completed quickly, significantly improving maintenance efficiency.

[0028] To facilitate the operation of the knob elastic element 44 by the staff, Huaying has connected an adjustment cap 442 to the outward side of the fixed end 441, and the adjustment cap 442 should be arranged on the outer side wall of the lower cover plate 1, and an anti-slip pad is provided on the outer side wall.

[0029] In actual use, the heating element 3 should be able to fit tightly against the bottom surface of the heat transfer plate 2 to achieve high-efficiency heat conduction. Therefore, a spring rod 13 should be set at the center of the bracket 12. The top surface of the spring rod 13 is provided with a connecting plate, and the bottom surface of the lower insulating plate 32 is provided with a slot that matches the connecting plate, so that the heating element 3 and the bracket 12 can be combined and installed. When the heating element 3 is set on the bracket 12, the heat transfer plate 2 will be pressed downward to be combined with the lower cover plate 1, so that the top surface of the heating element 3 will be squeezed simultaneously, thereby making the bottom surface of the heat transfer plate 2 fit tightly against the top surface of the upper insulating plate. Before assembly, the operator can also apply thermal grease to the top surface of the upper insulating plate to fill the pits on the surface of the upper insulating plate 31. At the same time, the upward thrust of the spring rod 13 can also cooperate with the snap-fit ​​structure of the locking component 4 to further improve the stability of the connection between the lower cover plate 1 and the heat transfer plate 2.

[0030] Furthermore, the design of the spring rod 13 at the center of the bracket 12 and the connecting plate allows the heating element 3 to adapt to thermal expansion and contraction during operation, maintaining a tight fit with the heat transfer plate 2 and improving heat transfer efficiency. At the same time, the elastic support of the spring rod 13 also facilitates the installation and disassembly of the heating element 3, providing a certain buffer force during disassembly to prevent the element from jamming.

[0031] The top surface of the lower cover plate 1 also has a groove at its center for installing the temperature limiter 5. This limiter, also known as a magnet, contains a permanent magnet ring and a spring, and can be pressed. When cooking rice, pressing the cooking switch activates the magnet, which pulls the lever switch to keep the power contacts connected. When the water in the pot evaporates and the bottom temperature reaches 103±2℃, the magnetic force of the permanent magnet ring becomes less than the spring force, causing the temperature limiter 5 to be pushed down by the spring, which in turn activates the lever switch to cut off the power.

[0032] An electrical interface 15 is also provided on the bottom surface of the lower cover plate 1. This electrical interface 15 is electrically connected to the aforementioned temperature limiter 5 and heating element 3 via wires. The other end of the electrical interface 15 is externally connected to a keep-warm switch 6, also known as a thermostat. This keep-warm switch 6 is arranged at intervals on one side of the lower cover plate 1 and fixed to the rice cooker shell or coffee machine shell. The keep-warm switch 6 consists of a spring plate, a pair of normally open contacts, a pair of normally closed contacts, and a bimetallic strip. When cooking rice, the temperature inside the pot rises, and the bimetallic strip bends upward due to the different thermal expansion rates of the two metals. When the temperature reaches above 80°C, the spring plate, driven by the bimetallic strip, causes the normally open and normally closed contacts to switch, cutting off the power supply to the heating element 33 and stopping heating. When the temperature inside the pot drops below 80°C, the bimetallic strip cools and returns to its original position, and the normally open and normally closed contacts switch again, connecting the power supply to the heating element 33 for heating, thus achieving the keep-warm function.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this utility model.

Claims

1. A heating plate main body structure, characterized in that, The device includes a lower cover plate (1) and a heat transfer plate (2). The top surface of the lower cover plate (1) is provided with a mounting groove (11). A bracket (12) is provided in the mounting groove (11). A heating element (3) is provided on the bracket (12). The bottom surface of the lower cover plate (1) is also provided with an electrical interface (15). The heating element (3) is electrically connected to the electrical interface (15) through a wire. The heat transfer plate (2) is arranged above the lower cover plate (1). The bottom surface of the heat transfer plate (2) is tightly attached to the top surface of the lower cover plate (1) and the heating element (3) and is sealed by a locking component (4).

2. The heating plate main body structure according to claim 1, characterized in that, The heating component (3) includes an upper insulating plate (31) and a lower insulating plate (32) configured as an annular structure, and a heating tube (33) disposed in the middle. The upper insulating plate (31) and the lower insulating plate (32) are provided with a fixing frame (34) on opposite sides. The surface of the fixing frame (34) is provided with several U-shaped grooves. The heating tube (33) is provided in multiple sets and arranged concentrically. Each heating tube (33) is correspondingly snapped into a U-shaped groove. The two sets of fixing frames (34) are attached to each other and locked by bolts.

3. The heating plate main body structure according to claim 2, characterized in that, The top edge of the lower cover plate (1) is also provided with a ring-shaped sealing groove (14). The sealing groove (14) is provided with multiple grooves arranged concentrically at intervals. The bottom edge of the heat transfer plate (2) is provided with a corresponding sealing insert plate (21). The sealing insert plate (21) is fastened inside the sealing groove (14) and has a gap with the side wall of the sealing groove (14).

4. The heating plate main body structure according to claim 3, characterized in that, The lower cover plate (1) is also provided with an injection hole on its outer side wall. The injection hole extends inward and communicates with the sealing groove (14).

5. The heating plate main body structure according to claim 4, characterized in that, The locking assembly (4) includes a guide groove (41) provided on the inner side wall of the lower cover plate (1), a slider (42) provided on the bottom surface of the heat transfer plate (2) and slidably inserted into the guide groove (41), a positioning hole (43) provided on the side wall of the guide groove (41), an elastic element (44) provided inside the positioning hole (43), and a through hole (45) provided on the end face of the slider (42). When the lower cover plate (1) and the heat transfer plate (2) are tightly fitted, the positioning hole (43) and the through hole (45) are horizontally aligned, and the elastic element (44) extends horizontally and inserts its front end into the through hole (45).

6. The heating plate main body structure according to claim 5, characterized in that, The elastic element (44) includes a fixed end (441), which is rotatably mounted inside the through hole (45) through a bearing structure. A rod (443) is provided at the center of the fixed end (441), and a locking end (444) is provided at the other end of the rod (443). The locking end (444) and the rod (443) are movably assembled through a spline structure. The end of the locking end (444) facing the center of the lower cover plate (1) is set in an arc shape. A helical torsion spring (445) is also provided between the fixed end (441) and the locking end (444), and the helical torsion spring (445) is fixedly connected to the locking end (444) and the inner wall of the positioning hole (43) respectively.

7. The heating plate main body structure according to claim 6, characterized in that, One end of the elastic element (44) extends outward to the end face of the lower cover plate (1) and is connected to an adjusting cap (442).

8. The heating plate main body structure according to claim 7, characterized in that, The support (12) is also provided with a spring rod (13) at the center. The top of the spring rod (13) is provided with a connecting plate and is closely attached to the bottom surface of the heating component (3).

9. The heating plate main body structure according to claim 8, characterized in that, The lower cover plate (1) is provided with a groove at the center of the top surface, and a temperature limiter (5) is provided inside the groove. The top of the temperature limiter (5) protrudes from the top surface of the heat transfer plate (2).

10. The heating plate main body structure according to claim 9, characterized in that, A heat preservation switch (6) is also arranged at intervals on one side of the lower cover plate (1), and the heat preservation switch (6) is electrically connected to the electrical interface (15) through a relay.

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