Cast iron heating element and heating device
By setting a buffer structure in the receiving groove of the heat-conducting plate, especially by coating it with a silicone coating, the problem of friction noise between the heating element and the heat-conducting plate during thermal expansion and contraction is solved, improving the user experience and extending the life of the device, while maintaining good heat transfer effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG BATOK ZHILIAN TECH CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-06-02
Smart Images
Figure CN224319535U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heating device technology, and in particular to a cast iron heating element and heating device. Background Technology
[0002] In electric heating devices using traditional cast iron heating elements (such as electric heaters and electric furnaces), the core heating unit consists of a ring-shaped heat-conducting plate made of cast iron and an embedded golden heat pipe. During assembly, the heating pipe is mechanically pressed into a pre-designed groove in the cast iron plate, forming a tight physical contact at room temperature. During heating, due to the difference in thermal expansion and contraction between the heat-conducting plate and the heating pipe, they undergo relative displacement and friction, resulting in noise (electric heaters, electric furnaces, and other heating appliances produce regular noise when plugged in; the sound produced by friction between the heating pipe and the heat-conducting plate differs in pitch from this noise), affecting the user experience. Utility Model Content
[0003] The main purpose of this invention is to provide a cast iron heating element and heating device, which aims to reduce the noise caused by friction between the heat-conducting plate and the heating tube due to thermal expansion and contraction.
[0004] To achieve the above objectives, the cast iron heating element proposed in this utility model includes:
[0005] Heating element;
[0006] The heat-conducting plate has a receiving groove for embedding the heating element; and
[0007] A buffer structure covers the groove wall of the receiving groove and / or the peripheral side of the heating tube, wherein the peripheral side of the heating tube is connected to the groove wall of the receiving groove through the buffer structure.
[0008] In one embodiment, the buffer structure is configured to be coated with a buffer coating formed on the groove wall surface of the receiving groove.
[0009] In one embodiment, the buffer coating is configured as a fire-resistant silicone or coating adhesive.
[0010] In one embodiment, the thickness of the buffer coating ranges from 0.1 mm to 0.5 mm.
[0011] In one embodiment, the buffer structure is made of a material that can withstand temperatures between 200°C and 1300°C.
[0012] In one embodiment, the receiving groove includes a fitting section that fits against the wall surface of the heating tube in the depth direction, an arc-shaped section that transitions with the plate body of the heat-conducting plate, and a straight section disposed between the fitting section and the arc-shaped section, wherein the buffer structure at least covers the groove wall surfaces of the fitting section and the straight section.
[0013] In one embodiment, two heat-conducting plates are provided and can be stacked on top of each other. At least one of the two heat-conducting plates is provided with the receiving groove, and the opening of the receiving groove is oriented toward the other.
[0014] In one embodiment, the heat-conducting plate has opposing first and second plate surfaces, the first plate surfaces of the two heat-conducting plates abutting each other, and the buffer structure also covers the first plate surfaces.
[0015] This utility model also proposes a heating device, comprising:
[0016] A cast iron heating element, comprising a heat-conducting plate, a buffer structure, and a heating tube, wherein the heat-conducting plate is configured as a cast iron component.
[0017] The technical solution of this utility model involves setting a buffer structure in the receiving groove before pressing the heating element into the receiving groove. When the heating element and heating plate begin to heat up or cool down, and when the heating element and heating plate expand and contract due to thermal expansion and contraction, the buffer structure plays a lubricating and buffering role, which can significantly reduce the abnormal noise generated by the friction between the heating element and heating plate, thereby helping to improve the user experience. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0019] Figure 1 A schematic diagram of the structure of an embodiment of the cast iron heating element provided by this utility model;
[0020] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;
[0021] Figure 3 This is a schematic diagram of another embodiment of the cast iron heating element provided by this utility model.
[0022] Explanation of icon numbers:
[0023] 100. Heat-conducting plate; 11. Receiving groove; 12. First plate surface; 13. Second plate surface;
[0024] 200. Heating element;
[0025] 300. Buffer structure;
[0026] 400. Heat dissipation module; 410. Heat dissipation fins; 411. Heat dissipation notch; 412. First air duct; 413. Second air duct.
[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0029] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0031] This utility model proposes a cast iron heating element.
[0032] Please see Figures 1 to 3 In one embodiment of this utility model, the cast iron heating element includes:
[0033] Heating element 200;
[0034] The heat-conducting plate 100 has a receiving groove 11 for the heating tube 200 to be embedded in; and
[0035] A buffer structure 300 covers the groove wall of the receiving groove 11 and / or the peripheral side of the heating tube 200, and the peripheral side of the heating tube 200 is connected to the groove wall of the receiving groove 11 through the buffer structure 300.
[0036] The technical solution of this utility model involves setting a buffer structure 300 in the receiving groove 11, and then pressing the heating element 200 into the receiving groove 11. When the heating element 200 and the heating plate begin to heat up or cool down, and when the heating element 200 and the heating plate undergo thermal expansion and contraction, the buffer structure 300 plays a lubricating and buffering role, which can significantly reduce the abnormal noise generated by the friction between the heating element 200 and the heating plate, thereby helping to improve the user experience.
[0037] In one embodiment, the material configuration of the buffer structure 300 is capable of withstanding temperatures between 200°C and 1300°C. This allows it to operate stably under conditions of thermal expansion of the heating element 200 and the heat sink, preventing rapid aging, decomposition, or loss of buffering performance due to excessively high temperatures. This ensures the long-term reliability of the buffer structure 300 under high-temperature conditions and avoids the risk of direct friction damage between the heating element 200 and the heat-conducting plate 100 due to the failure of the buffer structure 300, thus extending the service life of the entire device. Furthermore, the material configuration of the buffer structure 300 is capable of withstanding temperatures between 800°C and 1000°C. Most heating elements in commercially available heating devices can emit temperatures between 800°C and 1000°C, allowing the cast iron heating element proposed in this invention to be compatible with a wide range of heating devices on the market. In particular, the buffer structure 300 can also withstand temperatures up to 1280°C.
[0038] Furthermore, the buffer structure 300 is configured as a buffer coating formed on the groove wall surface of the receiving groove 11. The buffer coating is made of fire-resistant silicone or a coating adhesive. The adhesive material itself has a certain degree of elasticity and flexibility. When it is placed between the heating tube 200 and the heat-conducting plate 100, when the heating tube 200 and the heat-conducting plate 100 expand due to heat, the adhesive buffer structure 300 can absorb and disperse the relative motion energy between the heating tube 200 and the heat-conducting plate 100 through its own deformation, thereby significantly reducing the friction between the metal parts. This not only reduces the wear on the surface of the metal parts caused by friction, but also reduces the heat generated by friction, further preventing the heating tube 200 and the heat-conducting plate 100 from experiencing performance degradation or damage due to excessive friction and heat generation. The gel-like buffer structure 300 can effectively accommodate the minor deformations and displacements of the heating element 200 and the heat-conducting plate 100 during thermal expansion. Its material flexibility allows it to maintain a certain elastic recovery capability at different temperatures, ensuring a tight fit between the two metal parts and providing a continuous and stable buffering effect. Compared to some rigid buffer materials, the gel-like buffer structure 300 is not affected by excessively large or small buffer gaps due to temperature changes, ensuring effective mitigation of metal-part friction under various working conditions. Furthermore, gel-like materials typically have good processability, allowing for easy fabrication of buffer structures 300 in various shapes and sizes according to actual needs. This facilitates matching and installation with heating elements 200 and heat-conducting plates 100 of different shapes and structures, reducing processing and assembly difficulty and costs. Further, the refractory material includes 10%-31% sodium silicate and 40%-70% alumina. In other embodiments, the buffer structure 300 can be configured with other materials, such as high-temperature resistant sponge.
[0039] In one embodiment, the thickness of the buffer coating ranges from 0.1 mm to 0.5 mm. Within this range, the buffer coating provides good buffering effect without affecting heat transfer between the heating element 200 and the heat-conducting plate 100. Further, the thickness of the buffer coating ranges from 0.1 mm to 0.3 mm. Within this range, the heat transfer effect is even better, and the buffering effect is sufficient to reduce noise between the heating element 200 and the heat-conducting plate 100, and to reduce the production cost of the cast iron heating element.
[0040] In one embodiment, the receiving groove 11 includes a fitting section that conforms to the wall surface of the heating tube 200 in the depth direction, an arc-shaped section that transitions to the plate body of the heat-conducting plate 100, and a straight section located between the fitting section and the arc-shaped section. The buffer structure 300 at least covers the groove wall surfaces of the fitting section and the straight section. When the heating tube 200 is assembled onto the heat-conducting plate 100, the coating height of the buffer coating within the receiving groove 11 is higher than the tangent point between the heating tube 200 and the receiving groove 11, ensuring that the contact surfaces between the heating tube 200 and the heat-conducting plate 100 are filled with the buffer coating. In other embodiments, the coating may only be applied to the fitting section.
[0041] In one embodiment, the planar cross-sectional shape of the receiving groove 11 is W-shaped, and the planar cross-sectional shape of the heating element 200 is also correspondingly W-shaped. At the bends and corners of the receiving groove 11, the buffer structure 300 also covers the arc-shaped section. When the heating element 200 expands due to heat in the receiving groove 11, it extends along the extension direction of the heat-conducting plate 100 within the receiving groove 11. During this process, the heating element 200 may come into contact with the arc-shaped section of the receiving groove 11 at the bends and corners. Therefore, coating the arc-shaped section at the bends and corners with the buffer structure 300 helps to improve the noise reduction effect. In other embodiments, the buffer structure 300 may also be coated on the arc-shaped section throughout the entire receiving groove 11.
[0042] In one embodiment, two heat-conducting plates 100 are provided and can be stacked on top of each other. At least one of the two heat-conducting plates 100 is provided with the receiving groove 11, and the opening of the receiving groove 11 faces the other. In this case, the two heat-conducting plates 100 jointly clamp the heating tube 200, and the heat on the heating tube 200 is transferred to the two heat-conducting plates 100 along the clamping point. Further, the plate body of the heat-conducting plate 100 has opposing first plate surfaces 111 and second plate surfaces 112. The first plate surfaces 111 of the two heat-conducting plates 100 abut against each other, and the buffer structure 300 also covers the first plate surfaces 111 to avoid friction noise caused by thermal expansion and contraction between the two heat-conducting plates 100 and the heating tube 200. In other embodiments, there may be only one heat-conducting plate 100.
[0043] In one embodiment, both heat-conducting plates 100 are provided with receiving grooves 11, and the two receiving grooves 11 are arranged opposite to each other to enclose the installation channel of the heating pipe 200. The receiving groove 11 on the other heat-conducting plate 100 increases the contact area between the other heat-conducting plate 100 and the heating pipe 200, which helps to improve the conduction efficiency. At this time, there is also a buffer structure 300 between the receiving groove on the other heat-conducting plate 100 and the heating pipe 200, so as to effectively reduce the friction noise caused by thermal expansion and contraction between the other heat-conducting plate 100 and the heating pipe 200. In other embodiments, the other heat-conducting plate 100 may not have receiving grooves 11. In this case, only a portion of the structure corresponding to the receiving groove 11 on the other heat-conducting plate 100 is coated with a buffer coating, or the entire first plate surface 111 of the other heat-conducting plate 100 is coated with a buffer coating.
[0044] In one embodiment, two heating elements 200 are provided, each disposed within a receiving groove 11 of one of the two heat-conducting plates 100, with a buffer structure 300 provided between the two heating elements 200. Providing two heating elements 200 improves the heating effect of the cast iron heating element. In this case, the buffer structure 300 between the two heating elements 200 effectively prevents noise caused by friction between the two heating elements 200 due to thermal expansion and contraction. In other embodiments, only one heating element 200 may be provided.
[0045] In one embodiment, the cast iron heating element further includes a heat dissipation module 400, which includes heat dissipation fins 410 fixed to the second plate surface 112 of the heat-conducting plate 100. The heat dissipation fins 410 have heat dissipation notches 411. Since hot air rises and cold air sinks, when air can flow from bottom to top through the heat dissipation fins 410, thermal convection can be formed on the heat-conducting plate 100 to better heat the environment around the heating element. The cast iron heating element has a first mounting direction and a second mounting direction. In the first mounting direction, when the heat dissipation fins 410 extend vertically, air can pass between two adjacent heat dissipation fins 410 to form thermal convection. In the second mounting direction, when the heat dissipation fins 410 extend laterally, air can pass through the heat dissipation fins 410 through the heat dissipation notches 411 to form thermal convection.
[0046] In one embodiment, the heat dissipation module 400 includes multiple heat dissipation fins 410 arranged in parallel. Adjacent heat dissipation fins 410 are spaced apart to form a first airflow channel 412. Heat dissipation notches 411 of adjacent heat dissipation fins 410 are arranged opposite each other. In the parallel direction of the heat dissipation fins 410, the multiple heat dissipation notches 411 restrict the formation of a second airflow channel 413. Therefore, there is less obstruction during the upward movement of hot air in the second airflow channel 413, resulting in faster thermal convection and improving the working efficiency of the cast iron heating element with enhanced heat dissipation effect. Thermal convection occurs in the first airflow channel 412 in the first mounting direction and in the second airflow channel 413 in the second mounting direction. In other embodiments, the heat dissipation notches 411 may be staggered in the parallel direction of the heat dissipation fins 410.
[0047] Furthermore, multiple second air ducts 413 are provided, spaced apart along the extension direction of the first air duct 412. Since multiple heat dissipation fins 410 are provided, it can be deduced that multiple first air ducts 412 are provided. Therefore, each heat dissipation fin 410 has multiple heat dissipation notches 411, resulting in multiple second air ducts 413 formed on the heat dissipation fins 410. In this case, the heating efficiency of the cast iron heating element with enhanced heat dissipation effect installed along the first direction and the cast iron heating element with enhanced heat dissipation effect installed along the second direction to the surrounding air is approximately the same. Further, three second air ducts 413 are formed on the heat-conducting plate 100. In other embodiments, each heat dissipation fin 410 may have one heat dissipation notch 411.
[0048] Furthermore, both heat-conducting plates 100 are equipped with heat dissipation modules 400. That is, heat dissipation modules 400 are provided on both opposite sides of the heating tube 200 so that the heat on the heating tube 200 can be diffused from the opposite sides to the surrounding air. The double-sided heat convection setting can further improve the heating efficiency of the heating plate to the surrounding air.
[0049] This utility model also proposes a heating device, which includes a cast iron heating element. The specific structure of the cast iron heating element is as described in the above embodiments. Since this heating device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The heating device can be an electric heater or other heating devices with heating functions, and is not limited thereto.
[0050] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.
Claims
1. A cast iron heating element, characterized in that, include: Heating element; The heat-conducting plate has a receiving groove for embedding the heating tube; as well as A buffer structure covers the groove wall of the receiving groove and / or the peripheral side of the heating tube, wherein the peripheral side of the heating tube is connected to the groove wall of the receiving groove through the buffer structure.
2. The cast iron heating element as described in claim 1, characterized in that, The buffer structure is configured as a buffer coating applied to the groove wall surface of the receiving groove.
3. The cast iron heating element as described in claim 2, characterized in that, The buffer coating is made of fire-resistant silicone or a coating adhesive.
4. The cast iron heating element as described in claim 2, characterized in that, The thickness of the buffer coating ranges from 0.1 mm to 0.5 mm.
5. The cast iron heating element as described in claim 1, characterized in that, The buffer structure is made of a material that can withstand temperatures between 200°C and 1300°C.
6. The cast iron heating element as described in claim 5, characterized in that, The material configuration of the buffer structure is capable of withstanding temperatures between 800°C and 1000°C.
7. The cast iron heating element as described in claim 1, characterized in that, The accommodating groove includes a fitting section that fits against the wall of the heating tube in the depth direction, an arc section that transitions with the plate body of the heat-conducting plate, and a straight section located between the fitting section and the arc section. The buffer structure at least covers the groove wall surfaces of the fitting section and the straight section.
8. The cast iron heating element as described in claim 1, characterized in that, The heat-conducting plates are provided in two and can be stacked on top of each other. At least one of the two heat-conducting plates is provided with the receiving groove, and the opening of the receiving groove is oriented towards the other.
9. The cast iron heating element as described in claim 8, characterized in that, The heat-conducting plate has a first plate surface and a second plate surface facing each other, the first plate surfaces of the two heat-conducting plates abut each other, and the buffer structure also covers the first plate surface.
10. A heating device, characterized in that, include: The cast iron heating element according to any one of claims 1 to 9, wherein the cast iron heating element comprises a heat-conducting plate, a buffer structure and a heating tube, wherein the heat-conducting plate is configured as a cast iron part.