External radiation heating pressure integrated electric heating device

Abstract

The application relates to the technical field of high-pressure and large-flow electric heating, and discloses an external radiation heating pressure-bearing integrated electric heating device, which comprises a heat insulation and preservation layer, an electric heating layer, a heat storage assembly, an inlet pipeline, an outlet pipeline, a first diffusion cone and a second diffusion cone; the heat insulation and preservation layer is located at the outermost layer, the electric heating layer is located at the inner layer of the heat insulation and preservation layer and encloses an inner heating cavity; the input end of the heat storage assembly is connected with the large end surface of the first diffusion cone, the output end of the heat storage assembly is connected with the large end surface of the second diffusion cone, the output end of the inlet pipeline is provided with an air inlet screen, the air inlet screen of the inlet pipeline extends into the inner cavity of the first diffusion cone through the small end of the first diffusion cone, the small end of the second diffusion cone is connected with the outlet pipeline, and the inlet pipeline, the first diffusion cone, the heat storage assembly, the second diffusion cone and the outlet pipeline constitute an airflow conveying assembly; the airflow conveying assembly is suspended in the inner heating cavity and is arranged in contact with the electric heating layer.

Description

Technical Field

[0001] This invention relates to the field of high-pressure, high-flow electric heating technology, and in particular, to an integrated electric heating device for external radiation heating, heat storage, and pressure bearing. Background Technology

[0002] Electric heating devices, capable of providing high-temperature, pure airflow, primarily generate heat through resistance heating elements and transfer it to the heat storage medium or airflow via thermal radiation and conduction. Compared to traditional combustion heating methods, electric heating offers advantages such as precise temperature control, stable operation, and high safety, thus finding wide application in industrial hot air systems, material drying, environmental simulation, and high-precision experimental equipment.

[0003] In existing technologies, electric heating devices typically employ a heating method where airflow directly contacts the electric heating element. For example, a common duct electric heating device includes components such as an electric heating element, terminals, insulation material, and a junction box. During operation, airflow flows directly over the surface of the electric heating element, achieving heating through convection heat transfer. However, this method has significant shortcomings under high pressure and high flow conditions: the high-speed airflow continuously erodes the electric heating element, causing vibration. Long-term operation can easily lead to resistance wire fatigue, breakage, or loosening of connections, affecting the device's lifespan and reliability. Furthermore, the lack of effective isolation between the airflow channel and the heating element makes stable operation difficult under higher pressures (e.g., above 20 MPa).

[0004] To enhance heat storage capacity and adapt to heating demands at higher flow rates (e.g., 100 kg / s to 1000 kg / s), existing technologies have proposed regenerative heater schemes. For example, Lin Yuan et al. proposed a vertical regenerative heater (see "Numerical Simulation of Thermal Stress in Regenerative Heat Storage Body of Hypersonic Wind Tunnel Heat Storage Heater," Aerospace Technology, 2024, Vol. 3, pp. 93-102), which incorporates multiple stages of regenerative bodies. The heating element heats the regenerative body through radiation, and the airflow is heated as it passes through the regenerative body. However, in this structure, the regenerative body and the heating element are not completely isolated; the airflow still partially scours the heating element as it passes through the regenerative body, failing to completely solve the problem of airflow impact on the heating element under high pressure and high flow conditions. Furthermore, the regenerative body used in this structure is typically made of materials such as alumina and graphite, which have complex manufacturing processes and high costs. The overall mechanical stability and thermal response characteristics of the regenerative structure under high pressure still have room for optimization.

[0005] In summary, existing electric heating devices have the following main problems when used for heating high-pressure, high-flow-rate airflows:

[0006] 1. The heating element is in direct contact with the airflow, and is prone to vibration and damage under the scouring of high pressure and high speed airflow, which affects the long-term reliable operation of the device;

[0007] 2. The heat storage body and the heating element are not completely isolated, and the airflow may still impact the heating component, which limits its applicability under high pressure conditions;

[0008] 3. Traditional heat storage bodies often use special ceramics or graphite materials, which have complex manufacturing processes and high costs. In addition, the design of the heat storage structure and the pressure-bearing structure is relatively weak. Summary of the Invention

[0009] This invention provides an integrated electric heating device with external radiation heating, which can solve the technical problems of existing electric heating devices, such as the heating element being easily damaged by airflow and the poor reliability of operation under high pressure (above 20MPa) and high flow (100kg / s~1000kg / s), by isolating the direct contact between high-speed airflow and electric heating element, and using a multi-stage welded stainless steel cylindrical heat storage body for efficient heat storage and transfer.

[0010] This invention provides an integrated electric heating device for external radiation heating, comprising a heat insulation layer, an electric heating layer, a heat storage component, an inlet pipe, an outlet pipe, a first diffusion cone, and a second diffusion cone. The heat insulation layer is the outermost layer, and the electric heating layer is the inner layer of the heat insulation layer, forming an inner heating cavity. The input end of the heat storage component is connected to the large end face of the first diffusion cone, and the output end of the heat storage component is connected to the large end face of the second diffusion cone. The output end of the inlet pipe is configured as an air inlet screen, and the air inlet screen of the inlet pipe extends into the inner cavity of the first diffusion cone through the small end of the first diffusion cone. The small end of the second diffusion cone is connected to the outlet pipe. The inlet pipe, the first diffusion cone, the heat storage component, the second diffusion cone, and the outlet pipe constitute an airflow conveying component. The airflow conveying component is suspended in the inner heating cavity and is arranged without contact with the electric heating layer.

[0011] Furthermore, the heat storage component includes at least one heat storage unit; the heat storage unit is a cylindrical structure, and the end face of the cylindrical structure has multiple bidirectional through holes, forming a honeycomb structure.

[0012] Furthermore, the heat storage component includes multiple heat storage units, which are welded together in sequence along the axial direction, and the circular holes of the multiple heat storage units are arranged in an axially continuous manner.

[0013] Furthermore, a positioning structure is provided between two adjacent heat storage units.

[0014] Furthermore, a first support is provided at the welding point between two adjacent heat storage units. The first support is used to support the heat storage component so that the heat storage component is suspended in the inner heating cavity of the electric heating layer.

[0015] Furthermore, it also includes a second support, which is used to support the first diffusion cone and / or the connection between the first diffusion cone and the heat storage component, so that the input end of the heat storage component is suspended in the inner heating cavity of the electric heating layer.

[0016] Furthermore, it also includes a third support, which is used to support the second diffusion cone and / or the connection between the second diffusion cone and the heat storage component, so that the output end of the heat storage component is suspended in the inner heating cavity of the electric heating layer.

[0017] Furthermore, the cross-sectional shape of the thermal insulation layer is a regular polygon.

[0018] Furthermore, the inlet pipe and the inlet end of the thermal insulation layer are arranged at intervals; and / or the outlet pipe and the outlet end of the thermal insulation layer are arranged in close contact.

[0019] Furthermore, a support frame is provided on the outside of the thermal insulation layer, and / or support feet are provided on the bottom of the thermal insulation layer.

[0020] The present invention has the following beneficial effects:

[0021] 1. Core Protection and Reliability Enhancement Mechanism: By suspending the entire airflow delivery assembly, including the heat storage component, diffuser cone, and pipeline, within the inner heating cavity enclosed by the electric heating layer, and ensuring that it is laid out without contact with the electric heating layer, the direct contact between the high-pressure, high-speed airflow and the electric heating element (electric heating layer) is completely isolated in the physical structure. This fundamentally eliminates the direct scouring, impact, and vibration of the electric heating element by the high-speed airflow, so that the core heating component is not subjected to fluid force. This solves the technical problem that the electric heating element is easily damaged by vibration, fatigue, and thermal shock under high-pressure and high-flow conditions, and improves the long-term operational reliability and service life of the device under extreme conditions.

[0022] 2. Efficient and uniform radiative heat transfer and thermal energy conversion mechanism: The electric heating layer acts as a planar or volumetric radiation source to radiate heat to the inner heating cavity; the outer surface of the entire airflow conveying assembly suspended in the inner heating cavity (especially the outer wall of the first diffusion cone, the second diffusion cone, and the heat storage assembly) receives uniform radiative heat flow from all sides. This external radiative heating method allows heat to be transferred from the outside of the airflow channel assembly to the inside, avoiding the structural complexity and local overheating risk caused by directly arranging heating elements inside; heat is transferred from the outer wall of the assembly to the heat storage body and airflow inside through thermal conduction, and the heat transfer path is clear and controllable.

[0023] 3. Integrated effect of heat storage and pressure bearing: The heat storage component, as the core heat exchange and energy storage unit, has its input and output ends connected to the large end faces of the first and second diffuser cones, respectively, forming a rigidly connected, internally connected airflow pressure shell. This whole, consisting of the inlet pipe, diffuser cone, heat storage component, and outlet pipe, jointly bears the pressure load of the high-pressure airflow, realizing a deep structural integration of heat storage and pressure bearing functions. The heat storage component itself (e.g., using a multi-stage welded stainless steel cylindrical structure) is both a highly efficient heat storage body and part of the pressure bearing structure. It has high structural strength and can withstand high pressure. At the same time, it stabilizes the output heat and smooths temperature fluctuations through its huge heat capacity.

[0024] 4. Airflow Organization and Heat Exchange Enhancement Effect: The first diffuser cone, acting as a diffusion-type buffer cavity, can uniformly diffuse the relatively concentrated airflow (such as high-pressure, high-flow-rate airflow) exiting from the inlet pipe's air intake screen to the entire input end cross-section of the heat storage assembly, ensuring uniform airflow distribution upon entering the heat storage body and avoiding localized airflow short-circuiting and heat exchange dead zones. The air intake screen has a pre-distribution function; before the airflow enters the first diffuser cone, the air intake screen at the end of the inlet pipe performs preliminary flow equalization and rectification, further enhancing the uniformity of airflow distribution. This creates favorable conditions for efficient heat exchange in the heat storage components. The second diffuser cone smoothly collects the airflow heated by the heat storage body to the outlet pipe, reducing flow resistance losses. The first and second diffuser cones have a diffusion-collection effect. This flow channel structure of "pre-distribution by the inlet screen → uniform diffusion by the first diffuser cone → full heat exchange by the heat storage components → smooth collection by the second diffuser cone" synergistically optimizes the flow pattern of the airflow under high pressure, ensuring that the airflow and the heat storage body can carry out full and uniform convective heat exchange, thereby realizing efficient heat energy transfer under high flow rate.

[0025] 5. Thermal insulation and thermal efficiency guarantee mechanism: The outermost thermal insulation layer minimizes heat loss from the device to the environment and ensures that the heat generated by the electric heating layer is effectively sealed in the inner heating cavity for heating the airflow conveying components, thereby improving the thermal efficiency of the entire device and reducing operating energy consumption.

[0026] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0027] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0028] Figure 1This is a schematic diagram of the external structure of the heat storage and pressure bearing integrated electric heating device with external radiation heating according to a preferred embodiment of the present invention;

[0029] Figure 2 This is a cross-sectional structural schematic diagram of the integrated electric heating device for external radiation heating and heat storage and pressure bearing according to a preferred embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of the heat storage unit in a preferred embodiment of the present invention.

[0031] Legend:

[0032] 100. Thermal insulation layer; 101. Support frame; 102. Support leg; 200. Electric heating layer; 300. Heat storage component; 301. Heat storage unit; 400. Inlet pipe; 500. Outlet pipe; 600. First diffuser cone; 700. Second diffuser cone; 800. First support; 900. Second support; 1000. Third support. Detailed Implementation

[0033] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0034] like Figure 1 and Figure 2As shown, the external radiation heating integrated electric heating device for heat storage and pressure bearing in this embodiment includes a heat insulation layer 100, an electric heating layer 200, a heat storage component 300, an inlet pipe 400, an outlet pipe 500, a first diffusion cone 600, and a second diffusion cone 700; the heat insulation layer 100 is the outermost layer, and the electric heating layer 200 is the inner layer of the heat insulation layer 100, forming an inner heating cavity; the input end of the heat storage component 300 is connected to the large end face of the first diffusion cone 600, and the output end of the heat storage component 300 is connected to... The large end face of the second diffusion cone 700, the output end of the inlet pipe 400 is set as an air intake screen and the air intake screen of the inlet pipe 400 extends into the inner cavity of the first diffusion cone 600 through the small end of the first diffusion cone 600, and the small end of the second diffusion cone 700 is connected to the outlet pipe 500. The inlet pipe 400, the first diffusion cone 600, the heat storage component 300, the second diffusion cone 700 and the outlet pipe 500 constitute an airflow conveying component; the airflow conveying component is suspended in the inner heating cavity and is arranged without contact with the electric heating layer 200. The present invention relates to an integrated electric heating device for external radiation heating, which integrates heat storage and pressure bearing. By suspending the airflow delivery assembly, including the heat storage component 300, the diffuser cone, and the pipe, in an inner heating cavity enclosed by the electric heating layer 200, and ensuring that it is arranged without contact with the electric heating layer 200, the device completely isolates the direct contact between the high-pressure, high-speed airflow and the electric heating element (electric heating layer 200) in terms of physical structure. This fundamentally eliminates the direct scouring, impact, and vibration of the electric heating element by the high-speed airflow, so that the core heating component does not bear fluid force. This solves the technical problem that the electric heating element is easily damaged by vibration, fatigue, and thermal shock under high pressure and high flow conditions, and improves the long-term operational reliability and service life of the device under extreme conditions. The electric heating layer 200 acts as a planar or volumetric radiation source to radiate heat to the inner heating cavity. The outer surface of the entire airflow conveying assembly suspended in the inner heating cavity (especially the outer wall of the first diffusion cone 600, the second diffusion cone 700, and the heat storage assembly 300) receives uniform radiant heat flow from all sides. This external radiant heating method allows heat to be transferred from the outside of the airflow channel assembly to the inside, avoiding the structural complexity and local overheating risk caused by directly arranging heating elements inside. Heat is transferred from the outer wall of the assembly to the heat storage body and airflow inside through thermal conduction, and the heat transfer path is clear and controllable.The heat storage component 300 serves as the core heat exchange and energy storage unit. Its input and output ends are connected to the large end faces of the first diffuser cone 600 and the second diffuser cone 700, respectively, forming a rigidly connected, internally connected airflow pressure shell. This whole, consisting of the inlet pipe 400, diffuser cone, heat storage component 300, and outlet pipe 500, jointly bears the pressure load of the high-pressure airflow, achieving a deep structural integration of heat storage and pressure bearing functions. The heat storage component 300 itself (e.g., using a multi-stage welded stainless steel cylindrical structure) is both a highly efficient heat storage body and part of the pressure bearing structure. It has high structural strength and can withstand high pressure. At the same time, it stabilizes the output heat and smooths temperature fluctuations through its huge heat capacity. The first diffusion cone 600, acting as a diffusion-type buffer cavity, can evenly diffuse the relatively concentrated airflow (such as high-pressure, high-flow-rate airflow) exiting from the inlet screen of the inlet pipe 400 to the entire input end cross-section of the heat storage component 300, ensuring uniform airflow distribution upon entering the heat storage body and avoiding local airflow short-circuiting and heat exchange dead zones. The inlet screen has a pre-distribution function; before the airflow enters the first diffusion cone 600, the inlet screen at the end of the inlet pipe 400 performs preliminary flow equalization and rectification, which helps to further improve the uniformity of airflow distribution, thus preparing the heat storage component 300 for subsequent heat exchange. Efficient heat exchange creates favorable conditions; the second diffuser cone 700 smoothly collects the airflow heated by the heat storage body to the outlet pipe 500, reducing flow resistance loss; the first diffuser cone 600 and the second diffuser cone 700 have a diffusion-collection effect; this flow channel structure of "inlet screen pre-distribution → first diffuser cone 600 uniform diffusion → heat storage component 300 full heat exchange → second diffuser cone 700 smooth collection" synergistically optimizes the flow pattern of the airflow under high pressure, ensuring that the airflow and the heat storage body can carry out sufficient and uniform convective heat exchange, thereby achieving efficient heat energy transfer under large flow rates. The outermost heat insulation layer 100 minimizes the heat loss of the device to the environment, ensuring that the heat generated by the electric heating layer 200 is effectively sealed in the inner heating cavity for heating the airflow conveying components, thereby improving the thermal efficiency of the entire device and reducing operating energy consumption. This invention relates to an integrated electric heating device for external radiation heating and heat storage and pressure bearing. By suspending the airflow delivery component in the heating cavity without contact with it, the electric heating element is physically isolated from the working airflow, solving the reliability problem of the element under high pressure and high flow rate. Through the integrated structural design of external radiation heating and heat storage and pressure bearing, efficient and uniform heat transfer and reliable structural support are achieved. Furthermore, the coordinated flow channel design of "sieve-cone-heat storage body" optimizes the distribution and heat exchange of high-flow-rate airflow, jointly ensuring that the electric heating device can safely, reliably, efficiently, and stably heat the fluid to the target temperature under high pressure and high flow rate conditions.

[0035] like Figure 2As shown, in this embodiment, the electric heating layer 200 surrounds the heat storage component 300 in a 360° configuration, and the distance between the electric heating layer 200 and the heat storage component 300 is 30mm-500mm. The electric heating layer 200 surrounds the heat storage component 300 in a 360° configuration, forming a coaxial, closed annular or cylindrical radiant heating cavity. This ensures that heat is radiated evenly and without dead angles to the heat storage component 300 from all sides. Compared to unilateral or localized heating, the design of this invention enables the heat storage component 300 to obtain a uniform heat flow input along its entire circumference, thereby facilitating the formation of a uniform temperature field inside the heat storage body and avoiding problems such as excessive temperature gradients and thermal stress concentration caused by localized overheating or underheating. This, in turn, facilitates uniform heating of the airflow. A gap of 30 mm to 500 mm is provided between the electric heating layer 200 and the heat storage component 300 to form an annular radiative heat exchange cavity. This gap ensures that there is no physical contact between the electric heating layer 200 and the heat storage component 300, realizing completely non-contact heating and eliminating the risk of friction, wear, or short circuit caused by thermal expansion differences or vibration. This gap space is the core area where radiative heat transfer occurs, and its size directly affects the radiation angle coefficient and radiative heat transfer efficiency. The gap designed by this invention can achieve a good balance between ensuring radiative heat transfer efficiency and the overall size and cost of the control equipment. If the gap is too large, it may lead to a decrease in heating efficiency and an increase in equipment size. If the gap is too small, it may affect the installation of internal components, the space for thermal expansion, and increase the stringent requirements for manufacturing and assembly precision. The combination of 360° surround heating and a specific spacing ensures the realization of the core mechanism of external radiation heating. Spatially, it completely isolates the heating element (electric heating layer 200) from the working component (heat storage assembly 300) subjected to high-pressure airflow. High-pressure, high-flow-rate airflow, potentially accompanied by vibration, is completely confined within the heat storage assembly 300 and its connected pipes, while the external electric heating layer 200 exists in a relatively static environment unaffected by airflow. This physical isolation solves the technical problem of the electric heating element being easily damaged under high-pressure, high-flow-rate conditions. This spacing also provides the necessary space for the internal heat storage assembly 300 and its supporting structures (first support 800, second support 900, third support 1000) to be installed, inspected, and thermally expanded. The annular space formed by this spacing facilitates natural convection or forced circulation of air within the heating chamber, helping to equalize the temperature of the entire heating chamber and reduce localized hot spots. The appropriate spacing also provides the necessary operating space for the installation, wiring, maintenance, and even replacement of the electric heating element itself, improving the maintainability of the equipment.The electric heating layer 200 surrounds the heat storage component 300 in a 360° arc, maintaining a specific distance (30 mm to 500 mm) between them. This technical solution is the core structural feature for achieving efficient, uniform, and safe external radiation heating. By constructing a coaxial radiation heat exchange cavity, heat is uniformly transferred while physically isolating the heating element from the working medium, thus protecting the electric heating element. The setting of this distance is an optimized result after comprehensively considering factors such as radiation heat exchange efficiency, structural layout, thermal expansion adaptability, and maintainability. It is one of the key design parameters that enable the electric heating device to be reliably applied to harsh conditions with high pressure and high flow rate.

[0036] like Figure 2 and Figure 3 As shown, in this embodiment, the heat storage component 300 includes at least one heat storage unit 301. The heat storage unit 301 has a cylindrical structure, and multiple bidirectional through-holes are formed on the end face of the cylindrical structure, constituting a honeycomb structure. The cylindrical shape of the heat storage unit 301, compared with the common square cross-section, can better adapt to the radiative heat field of the internal heating cavity, reduce thermal stress concentration, and make the airflow smoother when flowing outside it. The honeycomb structure formed by multiple bidirectional through-holes on the end face of the cylinder creates a huge specific surface area. When the airflow flows through the holes at high speed, it undergoes intense convective heat transfer with the inner wall of the channel, greatly enhancing the heat transfer efficiency. The honeycomb structure is a classic compact heat transfer structure that can provide a large heat transfer area while maintaining low airflow resistance, which is beneficial for energy saving and stable operation of the system under high flow and high pressure conditions.

[0037] like Figure 2 and Figure 3As shown, the cylindrical heat storage unit 301, as a whole, has a considerable mass and volume, thus possessing a high heat capacity. Its honeycomb structure allows heat to be quickly and evenly transferred from the inner wall of the circular holes to the entire cylindrical solid part. In external radiation heating mode, heat is introduced from the outer wall of the cylinder and stored in the entire unit material, making the heat storage component 300 not only a heat exchanger but also a highly efficient thermal energy buffer. When upstream airflow conditions (such as pressure, flow rate, and temperature) fluctuate, the heat storage body can use its stored heat to compensate for the airflow temperature, playing a role in peak shaving and valley filling, thereby achieving stable and uniform output airflow temperature and enhancing the system's anti-disturbance capability. The honeycomb structure is a classic high-strength, lightweight structure. Multiple densely arranged circular holes form a mutually supporting rib network, giving the heat storage unit 301 excellent resistance to pressure and deformation when subjected to the internal and external pressure differences generated by high-pressure airflow. The cylindrical shape itself is also a shell structure with good pressure-bearing performance. This structure is highly compatible with the integrated heat storage and pressure-bearing design concept, allowing the heat storage unit 301 to serve as both a high-efficiency heat exchange and heat storage core and an important component of the pressure boundary, directly bearing and transmitting working pressure, ensuring structural safety under high-pressure conditions. Composing the heat storage component 300 with at least one heat storage unit 301 provides the flexibility of modular design. A single cylindrical honeycomb structure is easy to standardize and mass-produce using mature processes such as extrusion, sintering, and machining, which helps reduce costs and ensure consistent quality. Multiple heat storage units 301 can be combined in series according to different heating power and flow rate requirements, increasing the scalability of the device. Independent cylindrical units can, to some extent, alleviate the thermal stress problems caused by overall thermal expansion. The heat storage unit 301, designed with a cylindrical shape and bidirectional through-holes to form a honeycomb structure, integrates multiple advantages such as high-efficiency heat exchange, low flow resistance, large heat capacity, high strength, and ease of manufacturing in a single component. It not only achieves efficient heat energy exchange through direct contact with airflow, but its robust honeycomb structure also allows it to serve as part of the pressure-bearing structure, perfectly supporting the integrated heat storage and pressure-bearing design goal of the entire device. This is the foundation for ensuring that the electric heating device can achieve reliable, stable, and efficient heating functions under extreme conditions of high pressure and high flow.

[0038] like Figure 2 and Figure 3As shown, in this embodiment, the heat storage assembly 300 includes multiple heat storage units 301, which are sequentially welded together along the axial direction, and the circular holes of the multiple heat storage units 301 are arranged in an axially continuous manner. The multiple independent heat storage units 301 are connected into a single structure by sequential welding along the axial direction, eliminating the connection gaps and mechanical interfaces between the heat storage units 301. The continuous and dense metal connection formed by welding makes the entire heat storage assembly 300 a mechanically rigid, integral pressure-bearing component, capable of uniformly and efficiently transmitting and bearing axial and radial pressure loads, enhancing the structural integrity of the heat storage assembly 300 under high pressure. Welding ensures the airtightness of the connection between adjacent heat storage units 301, preventing leakage or short circuits of high-pressure airflow inside the assembly, ensuring that all airflow is forced to flow through the designed honeycomb channels, thereby achieving reliable high-pressure sealing. Multiple heat storage units 301 are welded together as a whole, and their honeycomb-shaped circular holes are arranged axially, making the airflow channel continuous and uninterrupted in the axial direction. From the perspective of heat transfer, this structure is conducive to the axial heat conduction of heat along the axial direction (i.e., the airflow direction) through the solid material (the welded unit wall). When the upstream heat storage unit 301 is heated, the heat can not only be transferred to the airflow through radiation and convection, but also be conducted to the downstream heat storage unit 301 through the welded solid connection, which helps to smooth the axial temperature gradient of the entire heat storage component 300 and make the outlet airflow temperature more uniform. The continuous channels also avoid local eddies and additional pressure loss caused by channel misalignment or necking. By welding multiple heat storage units 301 together, we essentially integrate multiple independent heat storage bodies into a larger and longer heat storage body, increasing the total volume and mass of the heat storage material, thereby improving the total heat capacity (thermal inertia) of the entire heat storage assembly 300. A heat storage assembly 300 with a larger heat capacity can store more heat, has a stronger ability to resist fluctuations in airflow or inlet temperature, and can more effectively ensure the stability of the outlet temperature, making it particularly suitable for the stability requirements of the heat source during high-pressure, high-flow heating. The welded heat storage assembly 300 forms a core structure with sufficient rigidity. When installed in a flow channel composed of diffuser cones, this integrated heat storage assembly 300 only needs to be fixed and sealed at its two ends (input and output ends), simplifying internal assembly, reducing potential leakage points and flow interference sources, improving the smoothness and reliability of the airflow channel, and reducing assembly complexity.

[0039] In this embodiment, a positioning structure is provided between two adjacent heat storage units 301. This positioning structure provides precise radial and circumferential positioning references for the two independent heat storage units 301 during assembly and welding. This ensures that when multiple heat storage units 301 are stacked axially, the densely distributed honeycomb-shaped holes on their end faces can achieve precise coaxial alignment. Only by achieving precise hole alignment can the continuous axial flow channel be ensured, avoiding misalignment, steps, or obstruction. This minimizes local eddies, airflow disturbances, and additional pressure losses caused by abrupt channel changes, and is the foundation for achieving low flow resistance, high-efficiency flow, and heat exchange. Positioning structures (such as the fit between bosses and grooves, and positioning pin holes) enable adjacent heat storage units 301 to quickly and accurately fix their relative positions during assembly, and maintain these positions until welding, improving assembly efficiency and precision. This provides a stable and well-aligned joint assembly state for subsequent welding. Stable assembly gaps and positions are prerequisites for achieving high-quality welds, ensuring uniform weld penetration and consistent weld formation, thereby significantly improving the mechanical properties, sealing reliability, and fatigue resistance of the welded joint. During welding, the positioning structures create defined mechanical constraints between the heat storage units 301, helping to control local deformation and relative displacement caused by welding heat input. This makes the entire welding process more controllable. Precise assembly control reduces additional assembly stress caused by misalignment or deformation, and makes the residual stress distribution after welding more uniform and predictable. For long-sized heat storage components 300 welded from multiple heat storage units 301, this is an effective measure to ensure final shape accuracy and straightness, optimize internal thermal stress state, and improve thermal shock resistance. The positioning structure ensures that the load (especially pressure and vibration load) can be smoothly and evenly transferred between multiple heat storage units 301 through the welded joints and the positioning structure itself, avoiding stress concentration caused by local misalignment, enhancing the overall rigidity and load-bearing stability of the entire heat storage assembly 300 as a pressure-bearing shell, and making it exhibit superior structural reliability under high pressure and possible vibration conditions.

[0040] like Figure 2 and Figure 3As shown, in this embodiment, a first support 800 is provided at the welding point between two adjacent heat storage units 301. The first support 800 is used to support the heat storage assembly 300 so that the heat storage assembly 300 is suspended in the inner heating cavity of the electric heating layer 200. The first support 800 is placed at the welding point between adjacent heat storage units 301. This part is a rigid connection area formed by welding, which itself has high local strength and stability. Setting the support point here can provide a stable and precise radial and circumferential positioning for the heat storage assembly 300. The first support 800 can be designed to extend outward from the welding point and connect with the outer shell (such as the insulation layer or the inner wall of the shell) to form a reliable internal support structure. This ensures that the entire slender heat storage assembly 300 can be stably and centrally suspended in the inner heating cavity, effectively preventing it from shaking, becoming eccentric, or contacting the inner wall due to gravity, airflow impact, or thermal deformation. It is the core support structure for achieving contactless installation. During operation, the heat storage component 300 undergoes axial and radial thermal expansion. Positioning the first support 800 at the welded joint (i.e., the connection between adjacent units) provides a more reasonable constraint point selection compared to placing it in the middle of the heat storage unit 301. Through a well-designed first support 800 (e.g., employing a structure that allows axial sliding), radial constraint can be provided while partially releasing or guiding the axial thermal expansion deformation of the heat storage component 300, avoiding excessive thermal stress. This helps control the deformation and stress caused by thermal expansion within the design range, preventing component bending or weld cracking due to improper constraint, thereby improving the thermal cycling reliability and structural lifespan of the device. A well-designed cross-sectional area and length of the first support 800 can further limit the heat conducted through it, helping to reduce unnecessary heat loss (i.e., the "thermal bridge" effect), improving the thermal efficiency of the device, and ensuring that more heat is used to heat the airflow. The first support 800 not only connects the heat storage component 300 to the external structure, but also indirectly strengthens the connection between adjacent heat storage units 301 at the welding points. When subjected to airflow pulsation or external vibration, the first support 800 provides additional damping and constraint, which can suppress harmful vibrations of the heat storage component 300, especially its welding connection points, reduce the risk of vibration fatigue, and make the long component welded from multiple heat storage units 301 have better dynamic stability when high pressure and high flow rate air passes through.

[0041] like Figure 2As shown, this embodiment also includes a second support 900. The second support 900 is used to support the first diffuser cone 600 and / or the connection between the first diffuser cone 600 and the heat storage component 300, so that the input end of the heat storage component 300 is suspended in the inner heating cavity of the electric heating layer 200. The second support 900 is specifically used to support the first diffuser cone 600 located upstream of the airflow and its connection with the heat storage component 300. This part is the intersection of the airflow inlet, the diffusion structure and the heat storage body, and bears the direct impact and flow pressure of the airflow. It is one of the most mechanically and thermally complex areas in the entire airflow channel assembly. The independent second support 900 can provide special radial and axial constraints for this critical connection part, ensuring that it is accurately and stably suspended in the center of the heating cavity, preventing swaying, vibration or contact with the inner wall under the impact of the airflow. This ensures the alignment and connection reliability between the upstream flow channel, the first diffuser cone 600 and the heat storage body, which is a prerequisite for ensuring that the airflow enters the honeycomb channel of the heat storage component 300 smoothly and evenly. By setting up a first support 800 (supporting the welded part in the middle of the heat storage component 300) and a second support 900 (supporting the upstream connection part), at least two main support points are formed along the axial direction of the airflow channel. Compared with single-point support, this multi-point support method can more effectively distribute the weight and fluid force of the entire airflow channel assembly consisting of the heat storage component 300, the diffuser cone, and the pipes, reduce the load borne by each support point, separate the constraint at the upstream end from the constraint at the middle section, and allow for more flexible constraint strategies in thermal expansion management (e.g., one end fixed and the other end sliding), thereby more rationally controlling the expansion deformation and internal stress of the entire airflow conveying assembly when heated, and optimizing the statically determinate and indeterminate constraint design of the system. The first diffusion cone 600 is a key component for the airflow to enter from the inlet pipe 400 and slow down and diffuse. Its structure is relatively high-precision and sensitive to the installation position. The second bracket 900, as an independent support for this component, can play a role in vibration isolation. Optionally, the second bracket 900 can be designed with a certain degree of damping or flexibility to absorb and attenuate the pulsations from the upstream pipe or the airflow itself, preventing these vibrations from being directly transmitted to the main body of the heat storage component 300. In particular, the precision honeycomb structure on its end face helps to protect the inlet end face of the heat storage body from vibration impact, maintain the structural integrity and sealing performance of the honeycomb channels, and reduce the risk of vibration fatigue.The first support 800 and the second support 900 work together to form a suspension system that supports the entire airflow delivery assembly. The first support 800 is mainly responsible for supporting the stability of the heat storage body, while the second support 900 focuses on ensuring the stability of the upstream key interface. The two have a clear division of labor and cooperate with each other to achieve stable suspension of the entire flow channel from the upstream diffusion section to the downstream heat storage body and then to the outlet section. This systematic suspension design ensures that the airflow delivery assembly can maintain a set non-contact gap with the electric heating layer 200 at any position (especially at mechanical and thermal key points). This is the structural guarantee for realizing the physical isolation mechanism of external radiation heating and jointly improves the overall structural robustness of the device under complex working conditions.

[0042] like Figure 2As shown, this embodiment also includes a third support 1000, which supports the second diffuser cone 700 and / or the connection between the second diffuser cone 700 and the heat storage component 300, so that the output end of the heat storage component 300 is suspended in the inner heating cavity of the electric heating layer 200. The addition of the third support 1000 at the output end of the airflow channel component, together with the support points of the second support 900 at the input end and the first support 800 in the middle, constitutes at least three support constraints distributed along the axial direction of the airflow conveying component, forming a complete and stable spatial constraint system. This system can effectively resist forces and moments from all directions (such as gravity, airflow impact force, thermal stress, etc.), preventing the airflow conveying component from undergoing rigid body displacement (such as translation, tilting) or rotation around the axis in three-dimensional space. This ensures the stability of the spatial attitude and center position of the entire airflow conveying component within the inner heating cavity, achieving the goal of suspending and non-contacting the airflow conveying component. The arrangement of the three supports provides the structural conditions for implementing specific thermal expansion management strategies. For example, one of the supports (e.g., the third support 1000) can be designed to be fixed in the axial direction, while the other two (e.g., the first support 800 and the second support 900) can be designed to allow axial sliding. In this way, when the entire heat storage component 300 and the diffuser cone system expand axially after being heated, the direction of expansion is determined, and the amount of expansion can be effectively absorbed and accommodated without generating excessive constraint stress inside the airflow delivery component or on the support structure. The third support 1000, as a fixed end or key constraint point, works in conjunction with other sliding supports to guide and control the direction and magnitude of thermal deformation, avoid thermal stress damage, and ensure long-term operational reliability. The second diffuser cone 700 is a key component that smoothly gathers the heated high-temperature airflow from the heat storage component 300 and guides it to the outlet pipe 500. The accuracy of its installation position directly affects the smoothness of the flow channel and the stability of the outlet airflow. The third bracket 1000 provides independent and precise positioning support for the second diffuser cone 700 and its connection with the heat storage component 300, ensuring that this key interface can maintain precise alignment and sealing with the outlet end of the heat storage component 300 under conditions of heat, pressure and possible vibration. This prevents misalignment, leakage or deformation of the interface due to insufficient support, ensures a smooth transition of the airflow in the outlet section and efficient energy recovery, and avoids additional flow losses and distortion of the outlet temperature field. The installation of the third support 1000 provides more balanced support for the airflow channel assembly, which may have a large length-to-diameter ratio and consists of the inlet, heat storage body, and outlet. This reduces the bending moment and local load on individual support points (especially the first support 800 in the middle), resulting in a more uniform distribution of support force. Under the combined action of multiple support points, the overall bending stiffness, torsional stiffness, and natural frequency of the entire airflow conveying assembly are significantly improved. This effectively suppresses harmful vibrations that may occur under high-pressure, high-flow-rate airflow excitation, enhancing the stability of the system under dynamic operating conditions.

[0043] like Figure 1 and Figure 2 As shown, in this embodiment, the cross-sectional shape of the thermal insulation layer 100 is a regular polygon. Using a regular polygon (such as a rectangle, hexagon, or octagon) cross-sectional shape allows for more efficient use of installation space compared to a circular cross-section. In engineering layouts, planar or linear gaps often exist between devices or between devices and external boundaries (such as mounting frames, walls, or other equipment). A regular polygon cross-section can fit more closely to these linear boundaries, reducing useless space around the equipment and improving the space-filling rate and layout compactness of the equipment within a specific space. This facilitates the miniaturization and modular integration of the entire heating system. The regular polygon cross-section, especially the octagon, has planar surfaces on all its outer surfaces, which facilitates the manufacturing of the thermal insulation layer 100's outer shell. The processes of material cutting, bending, and welding are simpler and less costly than those for curved surface processing. The planar shell facilitates direct and stable docking and connection with other external structures (such as the support frame 101, mounting base, maintenance platform, and external pipe flange interfaces), eliminating the need to manufacture complex curved surface fittings. Furthermore, the planar casing facilitates the installation and fixation of instruments, cable trays, control boxes, and other auxiliary equipment on its outer surface, greatly simplifying on-site installation, maintenance, and external integration. The cross-section is a regular polygon, and its inner wall (i.e., the mounting surface of the electric heating layer 200) is enclosed by multiple planes. This planar structure allows for easier and more regular attachment or arrangement of linear electric heating elements (such as heating wires, heating films, and heating tubes) on its inner surface, whether in strip, sheet, or tubular shapes. Compared to arrangement on a circular curved surface, it is easier to achieve a uniform and parallel arrangement of heating elements on a plane, thus promoting the formation of a relatively uniform radiative heat field within the device cavity. This is significant for achieving uniformity in external radiative heating. Each straight side of the regular polygon can serve as a stable mounting or support reference surface. During device installation, leveling, or when multiple devices are arranged side-by-side, these planes can be used for reliable positioning and fixation, increasing the overall structural stability of the equipment. The mechanical behavior of the planar casing under external loads (such as stacking or compression) is also easier to predict and control.

[0044] like Figure 2As shown, in this embodiment, the inlet pipe 400 and the inlet end of the thermal insulation layer 100 are arranged at intervals; and / or the outlet pipe 500 and the outlet end of the thermal insulation layer 100 are arranged in close contact. The interval arrangement of the inlet pipe 400 and the inlet end of the thermal insulation layer 100 forms a section of pipe outside the thermal insulation layer 100, which is exposed at ambient temperature and does not directly exchange heat with the internal high-temperature heating cavity. This design forms a thermal buffer zone at the inlet, which can effectively prevent (or greatly reduce) the heat conduction from the heating cavity to the outside through the metal pipe, thereby protecting the low-temperature fluid pipelines, valves, instruments, and other components connected upstream of the inlet pipe 400, preventing them from being damaged or having their measurement accuracy affected by unexpected high temperatures. It can also reduce the degree to which the low-temperature fluid is preheated by the wall of the inlet pipe 400 before entering the heating cavity, which is conducive to accurately controlling most of the heating process within the heating cavity and improving the controllability of heating efficiency. In addition, this interval space also provides convenience for the thermal expansion of the pipe and the connection of external supports. The outlet pipe 500 is fitted to the outlet end of the thermal insulation layer 100. The high-temperature outlet pipe 500 is encased within the extended structure of the thermal insulation layer 100, ensuring that the fluid continues to receive effective external insulation after leaving the core heating area. This minimizes heat loss of the heated fluid as it leaves the device, helps maintain the temperature of the fluid delivered to downstream equipment or points of use, improves the overall system's thermal efficiency, and reduces operating energy consumption. The "inlet gap, outlet fit" design creates an asymmetrical but logically clear heat flow boundary. At the cold end (inlet end) of the heating device, a section for heat exchange with the environment is actively introduced through the gap design to isolate the low-temperature components from the effects of internal high temperatures. At the hot end (outlet end), the fit design actively enhances insulation and locks in heat. This design synergistically optimizes the overall thermal management strategy of the device, protecting sensitive components on the low-temperature side while improving energy utilization efficiency on the high-temperature side. It is a thermal boundary design that balances system safety and economy. The spaced arrangement of the inlet pipe 400 allows for greater freedom of thermal deformation in both the axial and radial directions. When the device is in operation and the internal components expand due to heat, this exposed pipe can more flexibly absorb some of the internal thermal displacement, thereby reducing the thermal stress transmitted to the upstream external fixed pipeline. The close fit of the outlet pipe 500 also typically allows for relative sliding or reserved expansion gaps between it and the insulation layer, which can also accommodate thermal expansion. This arrangement helps to alleviate the problem of thermal stress concentration in the entire pipeline system and improves long-term operational reliability.The spaced arrangement of the inlet pipe 400 and the thermal insulation layer 100, and the close fit arrangement of the outlet pipe 500 and the thermal insulation layer 100, is a refined and differentiated pipeline interface design for the different thermal states and functional requirements of the "cold end" and "hot end" of the device. By cleverly controlling the relative relationship between the pipe and the insulation layer, effective thermal isolation of the low-temperature inlet and effective thermal retention of the high-temperature outlet are achieved. While improving the overall energy efficiency of the system, it also protects the peripheral equipment, adapts to the thermal expansion of the pipeline, and improves the thermal boundary management of the device. It is a key interface feature that enables it to be efficiently and reliably integrated into a larger fluid system.

[0045] like Figure 1 and Figure 2As shown, in this embodiment, a support frame 101 is provided on the outside of the thermal insulation layer 100, and / or support feet 102 are provided on the bottom of the thermal insulation layer 100. Providing a support frame 101 on the outside of the thermal insulation layer 100 and / or support feet 102 on the bottom provides an independent and complete load-bearing and installation foundation for the entire heating device body (including the thermal insulation layer, heating layer, and internally suspended components). This allows the device to be placed stably on the ground, platform, or other foundation as a whole module, without relying excessively on the connected piping system for load-bearing. This ensures the stability of the device's structure and the independence of its installation posture, which is a prerequisite for modular and standardized installation of the equipment. The specialized support frame 101 and support legs 102 can clarify and standardize the stress interface between the device body and the foundation or installation platform. They can effectively absorb and disperse the device's own weight, the weight of internal components, and the thermal stress that may be generated during operation, preventing these loads from being directly transmitted to the inlet pipe 400, outlet pipe 500, and their connecting flanges. This protects the sealing performance at the pipe interfaces and reduces the risk of leakage at pipe connection points caused by external loads. The structured support system also helps to isolate and attenuate vibrations from the external foundation or surrounding environment, reducing their impact on the internally precision-suspended heat storage components 300 and airflow stability. Optionally, the second support 900 and / or the third support 1000 extend outward from the thermal insulation layer 100 to form auxiliary support legs. This optional solution reflects the design concept of structural function reuse and integration. The structural components of the second support 900 and the third support 1000, which were originally used for internal suspension, are extended outward from the thermal insulation layer 100 to give them the auxiliary function of external support, realizing multiple uses of one item. Under the premise of basically not adding additional independent parts, the bottom support stability of the device is enhanced. These auxiliary support legs, which are extended from the internal supports, have a direct mechanical connection with the internal core structure (heat storage component 300, first diffusion cone 600, second diffusion cone 700), making the gravity transmission path of the device more direct, which helps to improve the stress distribution of the overall structure and simplifies the complexity of the external support frame 101. The clearly defined support feet at the bottom (whether independent support feet 102 or auxiliary support feet extending from the bracket) provide convenient leverage and adjustment points for the transportation, hoisting, and on-site positioning of the device. They can be easily matched with transport vehicles, hoisting slings, or anchor bolts, facilitating fine-tuning of the level and height on the installation site, ensuring the installation accuracy of the device, and also facilitating jacking operations during subsequent maintenance.

[0046] like Figure 2As shown, in this embodiment, the radial dimension of the first support 800 is smaller than that of the second support 900 and the third support 1000. During device operation, the heat storage component 300 undergoes significant axial thermal expansion due to heat. By setting the radial dimension of the first support 800 (located in the middle of the heat storage component 300) to be smaller than that of the second support 900 and the third support 1000 located at both ends, different radial constraint stiffnesses can be assigned to each support point. The first support 800, with its smaller radial dimension, provides relatively weaker radial displacement constraint on the supported part, while the second support 900 and the third support 1000, with their larger radial dimensions, provide stronger radial positioning. This differentiated design, especially when the first support 800 allows for a certain degree of flexibility or sliding in the radial direction, allows the central region of the heat storage component 300 to have greater free expansion space or less constraint reaction force in the radial direction when it expands due to heat. This enables more effective release of radial bending stress and local shear stress generated inside the component due to axial expansion obstruction, optimizing the thermal stress distribution of the entire component and preventing excessive constraint stress from causing structural damage. In the external radiation heating mode, there is a temperature gradient along the axis of the heat storage component 300. Since the temperature is highest in the middle region, the temperature at both ends (near the inlet and outlet diffuser cones) is relatively low due to the inflow of low-temperature airflow and the outflow of high-temperature airflow. The first support 800 is supported in the middle region with the highest temperature. Its radial dimension is small, which means that the thermal bridge cross section for heat conduction from the high-temperature region to the external environment is smaller and the path is longer. This helps to reduce the heat loss from the highest temperature region of the heat storage component 300 to the outside through the support, thereby maintaining the high-temperature environment in the middle of the heating cavity, which is beneficial to the uniformity of heating and energy efficiency. The first support 800, located in the middle of the heat storage component 300, mainly bears the weight of the component itself, as well as some bending moments that may be generated due to uneven temperature distribution. The second support 900 and the third support 1000, located at both ends, not only need to support the weight of the diffuser cone and part of the pipes, but also need to withstand the fluid force generated by the airflow impacting the diffuser cone, as well as the greater external reaction force and moment generated by the rigid connection between the inlet pipe 400 and the outlet pipe 500 and the external environment. Therefore, the structural stiffness (including radial and axial) of the second support 900 and the third support 1000 is required to be higher. Designing the second support 900 and the third support 1000 to have a larger radial dimension is a direct and effective means to improve their bending and torsional section modulus, enhance their load-bearing capacity and the overall stiffness of the connection parts, so as to meet the more complex mechanical environment requirements at the ends.This enables the entire three-point (or multi-point) suspension system to possess an intelligent collaborative working mode. The large-sized supports at the ends (second support 900, third support 1000) act as the main positioning and main load-bearing points, ensuring the certainty of the spatial position of the entire component. The small-sized support in the middle (first support 800) acts as an auxiliary support and thermal deformation coordination point, providing necessary vertical support while allowing the component to have a certain "self-adjustment" capability in the radial direction to adapt to thermal deformation. The three work together to achieve dynamic and stable suspension of the component in the working state, that is, while allowing thermal deformation to occur, it always maintains a non-contact state with the electric heating layer 200, avoiding jamming or overstress caused by excessive rigid constraints.

[0047] An electric heating device is provided, capable of heating high-pressure (20MPa) and high-flow-rate (100kg / s-1000kg / s) airflow. The device heats a honeycomb-shaped heat storage body via external radiation, which in turn heats the cold airflow, raising the temperature of the cold fluid from -100℃ to 50℃ to 100℃-400℃. This avoids contact between the airflow and the electric heating layer 200, enabling heating of high-flow-rate airflow under high-pressure conditions.

[0048] Currently used heaters often heat the airflow through direct contact between the heating wire and the heating element. When the airflow is high, the high-speed airflow can wash over the heating wire, causing vibration and damaging the core resistive element. This invention isolates the heating wire from direct contact, thus isolating it from vibration. Therefore, it can be used for airflow heating in high-pressure, high-flow-rate scenarios and is also beneficial for the long-term use of the heating device.

[0049] To meet the heating demand of large flow rates, heat storage materials are generally made of materials such as alumina and graphite, which have complex manufacturing processes. However, this invention uses resistance wire to radiate heat a stainless steel cylinder, and then welds multiple stainless steel cylinders together to form a heat storage body, which can achieve low cost and high heat storage capacity.

[0050] like Figure 1The diagram shows an integrated electric heating device for heat storage and pressure bearing with external radiation heating, comprising a heat storage component 300, an electric heating layer 200, a heat insulation layer 100, an inlet pipe 400, an outlet pipe 500, and diffusion cones (first diffusion cone 600 and second diffusion cone 700). The heat storage component 300 has a multi-stage cylindrical structure internally, connected by welding, with a honeycomb structure inside each cylinder. The heat storage component 300 is suspended and isolated from the electric heating layer 200, without direct contact. The electric heating layer 200 surrounds the heat storage body 360°, heating it through radiation. The heat insulation layer 100 is octagonal in shape, surrounding the electric heating layer 200 360°, providing insulation for the heat storage component 300 and isolating the electric heating layer 200 from the outside atmosphere for good safety protection. The inlet pipe 400 has a honeycomb structure to ensure uniform airflow into the heat storage body, and the outlet pipe 500 is a circular pipe. The inlet and outlet pipes are connected to the heat storage body via a diffuser cone.

[0051] The airflow to be heated first flows in through the inlet pipe 400, then flows evenly through the honeycomb-shaped air intake screen into the first diffuser cone 600, and then directly into the heat storage component 300. The first diffuser cone 600 serves two purposes: guiding the airflow and isolating the heat storage component 300 from the electric heating layer 200. Therefore, the airflow only contacts the heat storage body, flows inside the heat storage body, and is completely isolated from the electric heating layer 200, preventing it from being washed away. The heat storage component 300 is a multi-stage stainless steel cylindrical structure with multiple circular holes inside the cylinders, forming a honeycomb structure. Each stage of the cylinders is connected by welding. The airflow sequentially enters the multi-stage honeycomb-shaped cylinders for heat exchange and temperature increase, and then enters the second diffuser cone 700, converging at the outlet pipe 500. Large supporting brackets (second bracket 900 and third bracket 1000) are installed before and after the heat storage component 300 to support the stainless steel cylinders. The electric heating layer 200 is supported by a small bracket (first bracket 800) below the octagonal heat insulation layer 100, which suspends and isolates the electric heating layer 200 from the cylinder. The electric heating device as a whole has a horizontal structure.

[0052] The electric heating layer 200 is suspended and isolated from the heat storage component 300. The electric heating layer 200 wraps around the heat storage component 300 in a 360° manner. When the electric heating layer 200 is working, the electric heating layer 200 heats up rapidly. Since there is a temperature difference between the heat storage component 300 and the electric heating layer 200, the electric heating layer 200 heats the heat storage component 300 by radiation until the two temperatures are the same.

[0053] The outer side of the electric heating layer 200 is a heat insulation layer 100, which can not only keep the heat storage component 300 warm, but also isolate the electric heating layer 200 from direct contact with the outside world, ensuring safety and reliability.

[0054] This invention has a simple and novel structure, reliable performance, and completely solves the problem of heating under high pressure and high flow rate conditions.

[0055] In this invention, the heat storage component 300 of the electric heating device is suspended and isolated from the electric heating wire. The electric heating layer 200 uses external radiation to heat the heat storage body. The airflow only flows inside the heat storage component 300. The high-pressure and high-flow airflow will not scour the resistance wire. At the same time, the heat storage component 300 and the electric heating layer 200 are supported by the bracket, which can achieve good vibration isolation of the resistance wire.

[0056] The heat storage component 300 of this invention has a multi-level cylindrical body inside, the cylinders are made of stainless steel and have a honeycomb structure inside. The cylinders are connected by welding to form a horizontal structure. The length of the heat storage body can be appropriately extended or shortened according to the heat exchange requirements.

[0057] Compared with the best existing technology, the advantages of the present invention are as follows:

[0058] 1. The electric heating layer 200 heats the heat storage body through radiation heating. The high-pressure, high-flow airflow does not come into contact with the electric heating layer 200, which can isolate the direct impact of the airflow on the electric heating layer 200, and realize the efficient heating of the airflow inside the electric heating device under high pressure and high flow conditions.

[0059] 2. The heat storage component 300 has a horizontal structure with a multi-stage stainless steel cylinder welded inside. The length of the heat storage body can be extended according to the heat exchange requirements, and theoretically, multi-stage continuous heating can be achieved to realize rapid temperature rise of high-pressure and high-flow airflow.

[0060] Matters not covered in this invention are common knowledge.

[0061] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An integrated electric heating device for heat storage and pressure bearing with external radiation heating, characterized in that, It includes a thermal insulation layer (100), an electric heating layer (200), a heat storage component (300), an inlet pipe (400), an outlet pipe (500), a first diffusion cone (600), and a second diffusion cone (700); The heat insulation layer (100) is the outermost layer, and the electric heating layer (200) is the inner layer of the heat insulation layer (100) and they enclose each other to form an inner heating cavity; The input end of the heat storage component (300) is connected to the large end face of the first diffusion cone (600), and the output end of the heat storage component (300) is connected to the large end face of the second diffusion cone (700). The output end of the inlet pipe (400) is configured as an air intake screen, and the air intake screen of the inlet pipe (400) extends into the inner cavity of the first diffusion cone (600) through the small end of the first diffusion cone (600). The small end of the second diffusion cone (700) is connected to the outlet pipe (500). The inlet pipe (400), the first diffusion cone (600), the heat storage component (300), the second diffusion cone (700), and the outlet pipe (500) constitute an airflow conveying component. The airflow delivery assembly is suspended in the inner heating cavity and is arranged without contact with the electric heating layer (200); The airflow delivery assembly, which includes a heat storage component (300), a diffusion cone, and a pipe, is suspended entirely in an inner heating cavity enclosed by an electric heating layer (200), and is arranged without contact with the electric heating layer (200). The electric heating layer (200) surrounds the heat storage component (300) in a 360° pattern, and the distance between the electric heating layer (200) and the heat storage component (300) is 30mm-500mm; The electric heating layer (200) acts as a planar or volumetric radiation source to radiate heat to the inner heating cavity; the outer surface of the entire airflow conveying assembly suspended in the inner heating cavity, the outer wall of the first diffusion cone (600), the second diffusion cone (700) and the heat storage assembly (300) receive uniform radiant heat flow from all sides. This external radiant heating method allows heat to be transferred from the outside of the airflow channel assembly to the inside, avoiding the structural complexity and local overheating risk caused by directly arranging heating elements inside. The heat storage assembly (300) includes at least one heat storage unit (301), which is a cylindrical structure. Multiple bidirectional through-holes are formed on the end face of the cylindrical structure, creating a honeycomb structure. A first support (800) is provided at the welding point between two adjacent heat storage units (301). The first support (800) supports the heat storage assembly (300) so that the heat storage assembly (300) is suspended in the inner heating cavity of the electric heating layer (200). It also includes a second support (900), which is used for… The first diffuser cone (600) is supported and / or supported at the connection between the first diffuser cone (600) and the heat storage component (300), so that the input end of the heat storage component (300) is suspended in the inner heating cavity of the electric heating layer (200); the third bracket (1000) is also included, which is used to support the second diffuser cone (700) and / or supported at the connection between the second diffuser cone (700) and the heat storage component (300), so that the output end of the heat storage component (300) is suspended in the inner heating cavity of the electric heating layer (200); The heat storage component (300) serves as the core heat exchange and energy storage unit. Its input and output ends are connected to the large end faces of the first diffuser cone (600) and the second diffuser cone (700), respectively, forming a rigidly connected, internally connected airflow pressure shell. This whole, consisting of the inlet pipe (400), diffuser cone, heat storage component (300), and outlet pipe (500), jointly bears the pressure load of the high-pressure airflow, realizing the deep integration of heat storage function and pressure bearing function in the structure.

2. The integrated electric heating device for external radiation heating and heat storage with pressure bearing as described in claim 1, characterized in that, The heat storage component (300) includes multiple heat storage units (301), which are welded together in sequence along the axial direction, and the circular holes of the multiple heat storage units (301) are arranged in an axially through manner.

3. The integrated electric heating device for external radiation heating and heat storage with pressure bearing as described in claim 2, characterized in that, A positioning structure is provided between two adjacent heat storage units (301).

4. The integrated electric heating device for heat storage and pressure bearing with external radiation heating according to any one of claims 1 to 3, characterized in that, The cross-sectional shape of the thermal insulation layer (100) is a regular polygon.

5. The integrated electric heating device for external radiation heating with heat storage and pressure bearing according to any one of claims 1 to 3, characterized in that, The inlet pipe (400) and the inlet end of the thermal insulation layer (100) are arranged at intervals; and / or The outlet pipe (500) and the outlet end of the heat insulation layer (100) are arranged in close contact.

6. The integrated electric heating device for external radiation heating with heat storage and pressure bearing according to any one of claims 1 to 3, characterized in that, A support frame (101) is provided on the outside of the thermal insulation layer (100), and / or a support foot (102) is provided on the bottom of the thermal insulation layer (100).

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