Multilayer spiral induction heater

Abstract

The utility model discloses a multi-layer spiral induction heater, which is connected in series with a water heating flow pipeline, realizes the constant temperature of 40-55 DEG C, has the power of 2-3.5 kilowatts, and specifically comprises an induction coil, a heating furnace core, an insulating sleeve and a water pipe assembly. The water pipe assembly is arranged inside the insulating sleeve, the heating furnace core is sleeved outside the insulating sleeve, and the induction coil is wound on the outer wall of the heating furnace core. Compared with a traditional pipeline heating belt, the multilayer spiral induction heater adopts the electromagnetic induction principle for auxiliary heating, the water and electricity isolation design avoids the risks of electric shock and electric leakage, heat is directly transmitted to water through the heating furnace core and the water pipe assembly, energy loss is reduced, the heating efficiency is improved, and energy consumption is lower. In addition, due to the fact that the water heater can be directly connected in series in the water heating system, complex transformation projects are not needed, the installation mode is more concise, occupied space is small, and maintenance is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of heating equipment, in particular to a multi-layer spiral induction heater. Background Art

[0002] The main function of indoor auxiliary heating equipment is to provide additional heat when the main heating system is insufficient to meet specific needs, or to provide heating only for specific areas when full heating is not required. Common indoor auxiliary heating equipment on the market currently includes electric heaters, hot air blowers, wall-mounted gas boilers, electric heating film heaters, etc. The basic working principle of these devices is to generate heat through electricity or fuel and dissipate the heat into the indoor air, thereby alleviating the problem of insufficient indoor heating to a certain extent.

[0003] However, these auxiliary heating devices can usually only heat specific areas, and as independent devices, they will occupy a certain amount of indoor space. In addition, some devices such as wall-mounted gas boilers may be more complex to install and have higher costs. To solve these problems, those skilled in the art have proposed the solution of pipe heating tapes. Pipe heating tapes are usually wound around the outside of the pipes of the main heating system to supplement heat for the system. Their advantage lies in being able to more comprehensively increase the temperature of the heating area. However, pipe heating tapes also have some deficiencies, such as relatively low heating efficiency, high energy consumption, and the installation process may be more cumbersome. Therefore, although pipe heating tapes supplement the deficiencies of the main heating system to a certain extent, their efficiency and installation problems still remain technical challenges that need to be further optimized and solved. Summary of the Invention

[0004] To solve the above technical problems, the utility model provides a multi-layer spiral induction heater. To provide a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary part is not a general review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments. Its sole purpose is to present some concepts in a simple form as a prelude to the subsequent detailed description.

[0005] The utility model adopts the following technical solutions:

[0006] Provided is a multi-layer spiral induction heater, comprising: a heating furnace core, an induction coil, an insulating sleeve, and a water pipe assembly; the water pipe assembly is disposed inside the insulating sleeve, the heating furnace core is sleeved outside the insulating sleeve, and the induction coil is wound around the outer wall of the heating furnace core; the insulating sleeve includes: a plastic pipe body, a silica gel layer, and a fastening pipe body, the fastening pipe body is disposed inside the plastic pipe body, the silica gel layer is located between the plastic pipe body and the fastening pipe body, and a clamping groove is formed on the inner wall of the fastening pipe body; a plurality of uniformly distributed heating fins are disposed on the inner wall of the water pipe assembly, and a clamping ring adapted to the clamping groove is disposed on the outer wall of the water pipe assembly.

[0007] Further, the heating furnace core includes a plurality of silicon steel sheets stacked together, and the stacked silicon steel sheets are wound around the outside of the insulating sleeve in a spiral shape; an insulating film is disposed between adjacent silicon steel sheets.

[0008] Further, one end of the plastic pipe body is provided with a fixed end cover plate, and the other end is sleeved with a movable end cover plate, and spiral grooves are provided on the sides of the fixed end cover plate and the movable end cover plate facing the heating furnace core, and the end of the heating furnace core is embedded in the spiral grooves.

[0009] Further, the insulating sleeve further includes: a set screw nut; an external thread is provided at the end of the plastic pipe body where the movable end cover plate is disposed, and the set screw nut is screwed onto the plastic pipe body and presses against the side of the movable end cover plate.

[0010] Further, the insulating sleeve further includes: a protective sheet; sinking grooves are provided on the outer edges of the fixed end cover plate and the movable end cover plate, the protective sheet covers the surface of the heating furnace core, and the side edges of the protective sheet are embedded in the sinking grooves.

[0011] Further, the number of the heating fins is 4-8; the outer ends of the heating fins are connected to the inner wall of the water pipe assembly, the inner ends of the heating fins are suspension ends and point to the axis of the water pipe assembly; the width of the heating fins gradually decreases from the outer ends to the inner ends.

[0012] Further, there are three induction coils, and the three induction coils are sequentially wound around the outer wall of the heating furnace core; a pair of connection terminals are led out from each induction coil.

[0013] Further, the water pipe assembly includes: a water pipe main body, a quarter arc pipe, and a half arc pipe.

[0014] Beneficial effects brought by the present utility model: Compared with traditional pipeline heating tapes, the multi-layer spiral induction heater of this application uses the principle of electromagnetic induction for auxiliary heating. Its design of electrical and water isolation avoids the risks of electric shock and leakage. Heat is directly transferred to water through the heating furnace core and the water pipe assembly, reducing energy loss and improving heating efficiency, with lower energy consumption. In addition, since it can be directly connected in series to the water heating system without complex renovation projects, the installation method is more concise, occupies less space, and is easy to maintain. Brief Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 is one of the installation schematic diagrams of a multi-layer spiral induction heater of the present utility model;

[0017] Figure 2 is another installation schematic diagram of a multi-layer spiral induction heater of the present utility model;

[0018] Figure 3 is the structural schematic diagram of a multi-layer spiral induction heater of the present utility model;

[0019] Figure 4 is Figure 3 the partial enlarged view of;

[0020] Figure 5 is the structural schematic diagram of the water pipe main body of the present utility model;

[0021] Figure 6 is the layout schematic diagram of the heating furnace core. Detailed Embodiments

[0022] The following will describe the embodiments of the present utility model in detail with reference to the drawings. It should be clear that the described embodiments are only some embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0023] Such as Figures 1-6As shown, in some illustrative embodiments, a multi-layer spiral induction heater is provided, which is connected in series to a water heating pipeline to achieve a constant temperature of 40°C to 55°C and has a power of 2 kW to 3.5 kW. Specifically, it includes: an induction coil 1, a heating furnace core 2, an insulating sleeve 3, and a water pipe assembly 4. The water pipe assembly 4 is disposed inside the insulating sleeve 3, the heating furnace core 2 is sleeved outside the insulating sleeve 3, and the induction coil 1 is wound around the outer wall of the heating furnace core 2.

[0024] Both ends of the water pipe assembly 4 are threadedly connected to the indoor water heating pipeline. It is a part of the water circulation system in the device and is usually composed of metal pipes, which are used to effectively transfer heat to the water in the pipe. The function of the insulating sleeve 3 is to isolate the heating furnace core 2 from the water pipe assembly 4, achieve electrical and water isolation, and reduce heat loss. The heating furnace core 2 is the core part of the induction heater in this application and is located between the induction coil 1 and the water pipe assembly 4. The induction heater utilizes the principle of electromagnetic induction. When an alternating current passes through the induction coil 1, an alternating magnetic field will be generated at the heating furnace core 2 and the water pipe assembly 4. The alternating magnetic field generates eddy currents in the heating furnace core 2 and the water pipe assembly 4. Due to the existence of resistance, the eddy currents will generate heat, thereby heating the heating furnace core 2 and the water pipe assembly 4, and then heating the circulating water flowing through the water pipe assembly 4.

[0025] According to the actual situation of the heating system, the water pipeline is appropriately modified, and the induction heater is connected in series to the water heating pipeline by using flanges or threaded connections. At the same time, temperature sensors are installed at the inlet and outlet of the water pipeline to monitor the water temperature in real time. The control system adjusts the current of the induction coil 1 according to the signals of the temperature sensors to achieve constant temperature control, that is, the control system automatically adjusts the current of the induction coil 1 according to the difference between the real-time water temperature and the set temperature, so that the water temperature is stabilized at 40°C to 55°C.

[0026] The water pipe assembly 4 includes: a water pipe main body 41, a quarter-circular pipe 42, and a half-circular pipe 43. The number of each pipe fitting can be selected according to the heating requirements and the installation space. As Figure 1 shown, when the horizontal space is sufficient, the water pipe main body 41 is connected in series to the water heating pipeline by using flanges or threaded connections. As Figure 2 shown, when the horizontal space is insufficient, the water pipe main body 41 is arranged vertically, and then the quarter-circular pipe 42 and the half-circular pipe 43 are used to connect the water heating pipeline.

[0027] By selecting different numbers and types of pipe fittings, the layout of the water pipe assembly can be adjusted according to the actual heating requirements, thereby optimizing the heating efficiency and heat distribution. Moreover, the design of the water pipe assembly 4 allows adjustment according to the size of the installation space: when the horizontal space is sufficient, the traditional series connection method can be used; when the space is limited, the water pipe main body 41 can be arranged vertically and then connected by using arc pipes, improving the flexibility of installation.

[0028] The heating furnace core 2 includes a number of silicon steel sheets 21 stacked together, and the stacked silicon steel sheets 21 are wound around the outside of the insulating sleeve 3 in a spiral shape; an insulating film is provided between adjacent silicon steel sheets 21. Silicon steel sheet is a silicon-containing ferroalloy material with the advantages of high magnetic permeability and low iron loss. It is cut into a certain shape and size and then stacked together. In order to improve the coupling effect of magnetic flux and reduce eddy current loss, an insulating paint or an insulating film is usually applied between adjacent silicon steel sheets to isolate them. The stacked silicon steel sheets 21 are wound in a spiral shape. This structure can increase the length of the magnetic circuit, thereby enhancing the magnetic field effect and making the magnetic field more evenly distributed within the spiral-shaped furnace core, thus improving the heating efficiency.

[0029] A number of uniformly distributed heating fins 44 are provided on the inner wall of the water pipe assembly 4. Specifically, the heating fins 44 are provided on the inner wall of the water pipe main body 41. The heating fins 44 increase the inner surface area of the water pipe, thereby improving the heat exchange efficiency, ensuring that heat can be evenly transferred to the water flow, and avoiding the phenomenon of local overheating or overcooling. The number of heating fins 44 is 4 - 8. Such a number design can ensure the maximization of heat exchange efficiency and at the same time will not be too dense to affect the water flow.

[0030] The outer end of the heating fin 44 is connected to the inner wall of the water pipe main body 41, and the inner end of the heating fin 44 is a suspended end and points to the axis line of the water pipe main body 41; the width of the heating fin 44 gradually decreases from the outer end to the inner end. Since heat is first absorbed by the fins and then transferred to the inside of the water pipe main body through the fins, the above structural design can ensure the direct transfer of heat, maximize the heat absorption and transfer efficiency, and at the same time reduce the direct impact of the water flow on the fins, that is, reduce the impact on the water flow.

[0031] Since this application uses the principle of electromagnetic induction for auxiliary heating and the structure of the water pipe assembly 4 is redesigned to improve the heat exchange efficiency, the following problems may occur: If a large amount of impurities such as scale, rust, and sediment accumulate inside the water pipe, it will cause the internal channel of the water pipe to become narrower or even completely blocked, resulting in poor water flow. Moreover, the accumulation of impurities inside the water pipe will affect the heat exchange efficiency, leading to a decline in the heating effect. In severe cases, it may even damage the fin material, and the water flow resistance may also cause the water pump to be overloaded. For this reason, the water pipe main body 41 of this application adopts an easy-to-replace design, and the easy-to-replace design will be described in detail below.

[0032] The insulating sleeve 3 includes: a plastic pipe body 5, a silica gel layer 6, a fastening pipe body 7, a fixed end cover plate 8, a movable end cover plate 9, a set screw nut 10, and a protective piece 11.

[0033] The fastening pipe body 7 is arranged inside the plastic pipe body 5, and the silicone layer 6 is located between the plastic pipe body 5 and the fastening pipe body 7. Both the plastic pipe body 5 and the fastening pipe body 7 are made of plastic materials, having good insulation performance and heat resistance, preventing the current from directly contacting the water pipe and ensuring safety. The silicone layer 6 has good thermal stability and electrical insulation, and can effectively prevent current leakage, and is used to further enhance the insulation performance.

[0034] The fastening pipe body 7 is used to connect and fix with the water pipe assembly 4. A clamping groove 411 is formed on the inner wall of the fastening pipe body 7; a clamping ring 412 adapted to the clamping groove 411 is arranged on the outer wall of the water pipe main body 41. The adaptation means that the clamping ring 412 can be embedded into the clamping groove 411. When the water pipe main body 41 needs to be replaced, the water pipe main body 41 is pulled to one side until the clamping ring 412 disengages from the clamping groove 411. Due to the design of the silicone layer 6 and the fastening pipe body 7, it has a certain deformability. After processing the impurities, the water pipe main body 41 is inserted into the water pipe main body 41 again, and the clamping ring 412 is embedded into the clamping groove 411 again.

[0035] The plastic pipe body 5 realizes the support of the overall structure, effectively fixes the heating furnace core 2 and the water pipe assembly 4. At the same time, the combination of the plastic pipe body 5 and the silicone layer 6 provides double insulation protection, reduces the risk of electric leakage and short circuit, and improves the safety of the equipment. The design of the fastening pipe body 7 and the water pipe main body 4 makes the replacement of the water pipe main body 4 simpler and faster, without complex operations. The simple replacement method reduces the operation difficulty during maintenance and replacement, and reduces the maintenance cost; the adaptation design of the clamping groove 411 and the clamping ring 412 ensures the stability of the connection. Even under the impact of water flow or the vibration of the system, the connection can still be kept stable.

[0036] One end of the plastic pipe body 5 is provided with a fixed end cover plate 8, and the other end is sleeved with a movable end cover plate 9. The fixed end cover plate 8 and the plastic pipe body 5 are of an integrally formed structure. The movable end cover plate 9 is sleeved outside the plastic pipe body 5 and corresponds to the fixed end cover plate 8 to form a closed end. Spiral grooves are arranged on the sides of the fixed end cover plate 8 and the movable end cover plate 9 facing the heating furnace core 2. The shape of the spiral grooves is adapted to the spiral shape of the silicon steel sheet 21 in the heating furnace core 2, ensuring that the end of the heating furnace core 2 can be tightly embedded into the spiral grooves. After assembly, the end of the heating furnace core 2 will be embedded into the spiral grooves, forming a stable connection, which helps to ensure that the heating furnace core 2 will not shift or loosen during the operation of the equipment.

[0037] One end of the plastic pipe body 5 where the mobile end cover plate 9 is provided is provided with an external thread, which is convenient for matching with the thread of the set screw nut 10 to achieve firm fixation. The set screw nut 10 is screwed onto the plastic pipe body 5 and presses against the side surface of the mobile end cover plate 9 through the thread action. During the installation process, first align one end of the heating furnace core 2 with the spiral groove on the fixed end cover plate 8, and then sleeved it on the outside of the plastic pipe body 5. Then, the mobile end cover plate 9 is sleeved and abutted against the heating furnace core 2, so that the other end of the heating furnace core 2 is embedded into the spiral groove on the mobile end cover plate 9. Finally, tighten the set screw nut 10 so that the mobile end cover plate 9 is fixed on the plastic pipe body 5, thus completing the connection between the heating furnace core 2 and the insulating sleeve 3.

[0038] The above structural design makes the connection between the heating furnace core 2 and the insulating sleeve 3 more compact, saves space, and is suitable for installation in an environment with limited space. The installation process is simple and clear. Just align the spiral groove, sleeve the mobile end cover plate 9, and tighten the set screw nut 10 to complete the connection, which reduces the assembly difficulty and improves the assembly efficiency. The tight connection design improves the reliability of the entire induction heater, reduces the failures and maintenance requirements caused by connection problems, optimizes the overall structure and performance of the equipment, and makes it more suitable for the needs of household heating water.

[0039] Sunk grooves are provided on the outer edges of the fixed end cover plate 8 and the mobile end cover plate 9. The protective sheet 11 covers the surface of the heating furnace core 2, and the side edges of the protective sheet 11 are embedded in the sunk grooves. The design of the sunk groove is to install the protective sheet 11 and ensure its effective coverage and protection on the surface of the heating furnace core 2. At the same time, the coverage of the protective sheet 11 can also reduce the direct contact between the induction coil 1 and the heating furnace core 2 and reduce the risk of failure.

[0040] There are three induction coils 1, and the three induction coils 1 are sequentially wound around the outer wall of the heating furnace core 2; each induction coil leads out a pair of wiring terminals for connecting the power supply. Such a design enables each induction coil 1 to be independently controlled, which is convenient for adjusting the heating power according to actual needs. At the same time, it improves the heating efficiency, enabling electrical energy to be converted into heat energy more effectively.

[0041] Compared with the pipeline heating tape, this application uses the electromagnetic induction principle for auxiliary heating. The electromagnetic induction heating principle generates eddy currents in the heating furnace core 2 through the alternating magnetic field generated by the induction coil 1, thereby directly converting electrical energy into heat energy and avoiding energy loss in the resistance heating method.

[0042] The design of electrical and water isolation between the heating furnace core 2 and the water pipe assembly 4, through insulating materials such as insulating sleeves 3 and silicone layers 6, ensures that the current does not directly contact the water pipe, thus reducing the risks of electric shock and leakage. The design of the heating furnace core 2 and the water pipe assembly 4 enables heat to be directly transferred to the water, reducing heat loss during the transmission process and improving the heating efficiency. Due to the high efficiency and low energy consumption of electromagnetic induction heating, this design helps to save energy and reduce operating costs.

[0043] The multi-layer spiral induction heater can be directly connected in series to the water heating system without large-scale modification of the existing water heating system. The installation process is simpler, saving installation time and costs. The compact design makes the heater occupy less space and is suitable for installation in environments with limited space. Since there is no direct combustion process, the maintenance cost is low, and the heater has a simple structure, facilitating daily maintenance and troubleshooting.

[0044] As described above, the above are only specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A multilayer spiral induction heater, characterized in that: include: A heating furnace core, an induction coil, an insulating sleeve and a water pipe assembly; the water pipe assembly is arranged inside the insulating sleeve, the heating furnace core is sleeved outside the insulating sleeve, and the induction coil is wound on the outer wall of the heating furnace core; the insulating sleeve comprises: a plastic tube body, a silicone layer and a fastening tube body, the fastening tube body is arranged inside the plastic tube body, the silicone layer is located between the plastic tube body and the fastening tube body, and a groove is provided on the inner wall of the fastening tube body; a plurality of evenly distributed heating fins are arranged on the inner wall of the water pipe assembly, and a clamping ring adapted to the groove is arranged on the outer wall of the water pipe assembly.

2. A multilayer spiral induction heater according to claim 1, characterized in that: The heating furnace core comprises a plurality of silicon steel sheets stacked together, and the silicon steel sheets stacked together are wound around the outside of the insulating sleeve in a spiral shape; an insulating film is arranged between adjacent silicon steel sheets.

3. A multilayer spiral induction heater according to claim 2, characterized in that: A fixed end cover is provided at one end of the plastic tube body, and a movable end cover is sleeved at the other end. A spiral groove is provided on the side of the fixed end cover and the movable end cover facing the heating furnace core, and the end of the heating furnace core is embedded in the spiral groove.

4. A multilayer spiral induction heater according to claim 3, characterized in that: The insulating sleeve further comprises: a fixing nut; an end of the plastic tube body provided with the movable end cover plate is provided with an external thread, and the fixing nut is screwed onto the plastic tube body and pressed against the side surface of the movable end cover plate.

5. A multi-layer spiral induction heater according to claim 4, characterized in that: The insulating sleeve also includes: a protective sheet; a sink groove is provided on the outer edges of the fixed end cover plate and the movable end cover plate, the protective sheet covers the surface of the heating furnace core, and the side edge of the protective sheet is embedded in the sink groove.

6. A multilayer spiral induction heater according to claim 5, characterized in that: There are 4 to 8 heating fins; the outer ends of the heating fins are connected to the inner wall of the water pipe assembly, and the inner ends of the heating fins are suspended ends and point to the axis of the water pipe assembly; the width of the heating fins gradually decreases from the outer ends to the inner ends.

7. A multi-layer spiral induction heater according to claim 6, characterized in that: There are three induction coils, which are wound around the outer wall of the heating furnace core in sequence; each of the induction coils leads to a pair of connection terminals.

8. A multi-layer spiral induction heater according to claim 7, characterized in that: The water pipe assembly comprises: a water pipe body, a quarter arc pipe and a half arc pipe.

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