High-pressure fluid plate electric heater
The high-pressure fluid plate electric heater, which combines a multi-layer structure and diffusion welding process, solves the problems of large size, heavy weight, and uneven heating of existing electric heaters under high pressure, and achieves efficient and safe heating effect and compact design.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENGSHUI KEHENGFA POWER EQUIP CO LTD
- Filing Date
- 2025-07-29
- Publication Date
- 2026-07-17
AI Technical Summary
Existing shell-and-tube and plate electric heaters suffer from problems such as large size, heavy weight, uneven heating, complex processing, and environmental unfriendliness under high pressure, making it difficult to meet the demand for efficient and safe heating.
It adopts a multi-layer structure design, including alternating layers of microchannel heat exchange and electric heating, combined with integrated design and diffusion welding process. It uses capillary tubes as flow channels, and electric heating tubes and gaskets form a rectangular plate, which is welded together by vacuum diffusion welding process to achieve high pressure resistance, uniform heating and compactness.
It achieves a compact, lightweight, uniform, and safe heating effect under high pressure, shortens the production cycle, improves equipment compactness and safety, and adapts to a wide range of working conditions.
Smart Images
Figure CN224517000U_ABST
Abstract
Description
Technical Field
[0001] This utility model provides a high-pressure fluid plate electric heater, belonging to the field of electric heater technology. Background Technology
[0002] In industries such as petroleum, chemical, and pharmaceutical, high-pressure fluid electric heaters typically employ two structures: shell-and-tube and plate-type. Shell-and-tube structures suffer from large size, excessive weight, and high material consumption when subjected to high pressure, and are prone to temperature stratification of the working fluid due to uneven heating. Compared to shell-and-tube structures, plate-type electric heaters offer significant improvements in size control and heat exchange uniformity, but the working fluid flow channels are often processed using chemical etching, which is both environmentally unfriendly and significantly extends the production cycle. Furthermore, the processing of the electric heating layer is complex, resulting in weaker quality assurance, and the external tubing reduces the equipment's compactness. Therefore, developing an electric heater that combines short production cycles, compact size, excellent pressure resistance, uniform heating, and reliable safety to meet the high-efficiency heating requirements under special operating conditions is of significant practical importance for promoting technological upgrades and safe production in related industries. Utility Model Content
[0003] The core objective of this invention is to provide a novel high-pressure fluid plate electric heater, effectively overcoming many shortcomings of existing shell-and-tube and plate electric heaters. Through innovative structural design and technological integration, this heater achieves high pressure resistance while also possessing excellent characteristics such as small size, light weight, and uniform heating. Optimized manufacturing processes significantly shorten the production cycle. The integrated design of the tube box and heating core further enhances the compactness of the equipment. The electric heating layer adopts mature technology, ensuring reliable quality stability and safety in use.
[0004] This high-pressure fluid plate electric heater combines the above characteristics to provide a stable and reliable heating solution for production operations in related industries.
[0005] The high-pressure fluid plate electric heater has a multi-layer structure. The bottom layer is a base plate, and above it are multiple layers of alternating microchannel heat exchange layer and electric heating layer; the top layer is a microchannel heat exchange layer and a top plate.
[0006] The electric heating layer includes an electric heating tube baffle, with gaskets fixedly connected to both ends of the electric heating tube baffle. The gaskets and the electric heating tube baffle form a rectangular plate, with a first through hole on one of the opposite corners of a pair of rectangular plates. An electric heating tube is embedded in the electric heating tube baffle in a meandering manner, and wiring contacts for the electric heating tube are provided on both sides of the electric heating tube baffle. The outer diameter of the electric heating tube is the same as the thickness of the electric heating tube baffle and the gaskets.
[0007] The microchannel heat exchange layer comprises a three-layer structure, including partitions on both outer sides, with a flow channel baffle between the partitions. A second through-hole is provided on a pair of opposite corners of the partitions, and a third through-hole is also provided on a pair of opposite corners of the flow channel baffle. The positions of the second and third through-holes are opposite to the positions of the first through-holes. A capillary array is embedded within the flow channel baffle. The capillary array is arranged in a circuitous manner, and both ends of the capillaries in the capillary array are connected to the third through-holes. The outer diameter of the capillaries in the capillary array is the same as the thickness of the flow channel baffle.
[0008] The technical effects of this utility model are as follows:
[0009] (1) The heating core and fluid tube box are integrated into one design, which effectively improves the compactness of the electric heater and significantly reduces its volume and weight.
[0010] (2) The electric heating tube has been improved to withstand the high temperature of diffusion welding up to 1100℃. The electric heater as a whole is processed by diffusion welding process, with high welding strength and strong temperature and pressure resistance.
[0011] (3) Using capillary tubes as working fluid channels, the cross-section of the channels is circular, there are no stress concentration points, strong pressure bearing capacity, and the materials are easy to obtain and eliminate complex processing procedures such as etching, which can shorten the production cycle.
[0012] (4) The electric heating layer and the heat exchange layer are stacked alternately to form an interlayer heating structure, ensuring heating uniformity and effectively avoiding temperature stratification of the working fluid. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model;
[0014] Figure 2 This is a schematic diagram of the electric heating layer structure of this utility model;
[0015] Figure 3 This is a schematic diagram of the microchannel heat exchange layer structure of this utility model. Detailed Implementation
[0016] like Figure 1 As shown, the high-pressure fluid plate electric heater has a multi-layer structure. The bottom layer is the bottom plate 4, and above it are multiple layers of alternating microchannel heat exchange layer 3 and electric heating layer 2; the top layer is the microchannel heat exchange layer 3 and the top plate 1.
[0017] The number of alternating layers of microchannel heat exchange layer 3 and electric heating layer 2 can be flexibly adjusted and optimized according to actual heating requirements, fluid flow rate and pressure, etc., to achieve the best heating performance.
[0018] like Figure 2As shown, the electric heating layer 2 includes an electric heating tube baffle 22. Gaskets 21 are fixedly connected to both ends of the electric heating tube baffle 22. The gaskets 21 and the electric heating tube baffle 22 form a rectangular plate. A first through hole 25 is provided at one pair of opposite corners of the rectangular plate. An electric heating tube 23 is intricately embedded in the electric heating tube baffle 22, or in other embedding methods, such as a straight groove embedding of a straight electric heating tube. Wiring contacts 24 for the electric heating tube 23 are provided on both sides of the electric heating tube baffle 22. The outer diameter of the electric heating tube 23 is the same as the thickness of the electric heating tube baffle 22 and the gaskets 21. The tortuous design of the electric heating tube 23 and the baffle effectively increase the heat exchange area and improve heating efficiency.
[0019] Each electric heating layer 2 has two pre-reserved wiring contacts 24. The electric heating tubes 23 of each electric heating layer 2 can be flexibly connected in series or in parallel by welding according to the actual heating power required.
[0020] The electric heating element 23 adopts a flexible electrical connection design, which enables the heater to easily adapt to different working voltage and power requirements. Users can conveniently adjust the output power of the heater according to specific working conditions, thereby achieving efficient and energy-saving heating operation.
[0021] like Figure 3 As shown, the microchannel heat exchange layer 3 includes a three-layer structure, including partitions 31 on both outer sides, and flow channel baffles 33 between the partitions 31 on both sides. A second through hole 34 is provided on a pair of opposite corners of the partitions 31, and a third through hole 35 is also provided on a pair of opposite corners of the flow channel baffles 33. The positions of the second through hole 34 and the third through hole 35 are opposite to the position of the first through hole 25. A capillary array 32 is embedded in the flow channel baffles 33. The capillary array 32 is arranged in a roundabout manner or in a straight channel, and both ends of the capillary of the capillary array 32 are connected to the third through hole 35. The outer diameter of the capillary of the capillary array 32 is the same as the thickness of the flow channel baffles 33.
[0022] The capillary array provides a certain degree of support and force transmission, and the smooth inner wall of the capillary effectively reduces fluid resistance. At the same time, the capillary flow channel design ensures that the fluid flows uniformly within the channel. The interlayer heating design with alternating heat exchange and heating layers effectively avoids the generation of local hot or cold spots in the working fluid, achieving a stable and uniform heating effect.
[0023] This utility model is manufactured using a solid-state additive manufacturing method, that is, according to... Figure 1 As shown, all the layers are stacked together in a specific order and position, and then welded together under specific conditions such as vacuum, pressure and heat using vacuum diffusion welding technology. After further processing such as welding external pipes to the top plate 1 and bottom plate 4, the manufacturing process can be completed.
[0024] Diffusion welding can achieve atomic-level bonding between layers, resulting in high welding strength. This significantly improves the pressure resistance and safety of electric heaters, thereby greatly expanding their applicable range and making them more widely used.
[0025] The flow channel structure and processing technology of the microchannel heat exchange layer 3 of this invention are diverse and not limited to the capillary form used in the example. For example, in practical applications, structures such as microchannels processed by etching can be used instead.
[0026] The electric heating element of this utility model has a variety of options, such as U-shaped electric heating element, straight electric heating element, etc., according to its shape; and stainless steel electric heating element, titanium electric heating element, etc., according to its material.
[0027] In principle, the wiring position of the heater body of this utility model can be designed in any position as long as it is not in communication with the fluid.
[0028] Compared with traditional shell-and-tube electric heaters, the multi-layer plate structure and microchannel design of this invention significantly improve the heat exchange area and heating power per unit volume, making it smaller, lighter, and with higher power density.
[0029] Compared to plate electric heaters, this utility model uses a tube box welded together at the through holes of the plate. The tube box and the heating core are designed as an integrated unit, which further reduces the size and weight of the equipment and improves its compactness.
[0030] Compared with shell-and-tube electric heaters and plate electric heaters, this invention has a simpler process, higher production efficiency, and lower overall cost.
[0031] The layered design of this invention effectively isolates the heating element from the fluid medium, fundamentally eliminating safety hazards caused by direct contact between the heating element and the medium.
[0032] The interlayer heating method of alternating heat exchange layer 3 and electric heating layer 2 in this invention ensures that the fluid is heated evenly throughout the heating process, effectively avoiding the problem of high and low temperature stratification of the working fluid. Moreover, the number of layers can be adjusted to adapt to a wider flow range, making it applicable to a wider range of scenarios.
[0033] This invention features a device without an internal pressure vessel, eliminating the need for registration and annual inspection. Furthermore, its integral molding process using diffusion welding provides excellent pressure resistance and safety, making it suitable for various harsh environments.
Claims
1. A high pressure fluid plate electric heater characterized by, It has a multi-layer structure, with the bottom layer being the base plate (4), and above it are multiple layers of alternating microchannel heat exchange layer (3) and electric heating layer (2); the top layer is the microchannel heat exchange layer (3) and top plate (1). The electric heating layer (2) includes an electric heating tube baffle (22), with gaskets (21) fixedly connected to both ends of the electric heating tube baffle (22). The gaskets (21) and the electric heating tube baffle (22) form a rectangular plate. A first through hole (25) is provided on one pair of opposite corners of the rectangular plate. An electric heating tube (23) is embedded in the electric heating tube baffle (22), and wiring contacts (24) for the electric heating tube (23) are provided on both sides of the electric heating tube baffle (22). The microchannel heat exchange layer (3) includes a three-layer structure, including partitions (31) on both sides, and flow channel baffles (33) between the partitions (31) on both sides. A second through hole (34) is provided on a pair of opposite corners of the partition (31), and a third through hole (35) is also provided on a pair of opposite corners of the flow channel baffle (33). The positions of the second through hole (34) and the third through hole (35) are opposite to the position of the first through hole (25). A capillary array (32) is embedded in the flow channel baffle (33). Both ends of the capillary array (32) are connected to the third through hole (35).
2. The high pressure fluid plate electric heater of claim 1, wherein, The outer diameter of the electric heating tube (23) is the same as the thickness of the electric heating tube baffle (22) and the gasket (21).
3. The high pressure fluid plate electric heater of claim 1, wherein, The outer diameter of the capillary array (32) is consistent with the thickness of the flow channel baffle (33).