A kind of inner bag-free electromagnetic heating spray instantaneous vaporization steam generation method and device
The inner tankless electromagnetic heating spray steam generator solves the problems of low heating efficiency, scaling, slow start-up and shutdown, and safety hazards of existing steam generators, achieving the effects of instant production, efficient and stable operation, and low maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 王永超
- Filing Date
- 2026-04-13
- Publication Date
- 2026-07-31
AI Technical Summary
Existing steam generators suffer from problems such as low heating efficiency, severe scaling, slow start-up and shutdown response, cumbersome maintenance, and safety hazards related to pressure vessels, making them particularly unsuitable for compliant use by small businesses and households.
The electromagnetic heating spray structure with a tankless design utilizes electromagnetic induction to heat the metal vaporization plate. Combined with the spray assembly and closed-loop control system, it achieves water and electricity separation, eliminates the need for water storage, and features a modular design, ensuring safe and efficient operation.
It achieves instant steam production, no pressure vessel risks, safe water and electricity separation, prevention of scaling, low operation and maintenance costs, extended equipment life, reduced energy consumption by more than 40%, and stable steam output.
Smart Images
Figure CN122486148A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of steam generating equipment technology, specifically to a tankless steam generator that uses electromagnetic induction heating of a metal plate and instantaneous vaporization via spraying. It is particularly suitable for steam usage scenarios that do not require large pressure vessels, such as food processing, industrial drying, small-scale steam supply, commercial catering, and household steam cleaning. Background Technology
[0002] Traditional electric steam generators generally use a structure of water storage in an inner tank combined with resistance heating tubes. However, this type of equipment has revealed several intractable technical defects during long-term use: First, the heating efficiency is low, with the heat conversion efficiency of the resistance heating tubes being only 60%-70%. Furthermore, heat must be transferred to the water through the inner tank wall, resulting in significant heat loss and high overall energy consumption. Second, scaling is a serious problem. Long-term water storage and heating in the inner tank causes calcium and magnesium ions in the water to continuously precipitate and form scale. Scale buildup further reduces heat transfer efficiency and can lead to localized overheating and damage to the heating tubes, requiring frequent disassembly and cleaning, resulting in high maintenance costs. Third, the heating rate is slow, requiring 10-30 minutes of preheating to produce adequate steam, which cannot meet the needs of frequent start-stop operations. Continuous heat preservation during standby results in significant energy waste. Meanwhile, the inner-tank water storage structure falls under the category of pressure vessels regulated by the Special Equipment Safety Law. Its use poses significant safety hazards such as overpressure explosions and leaks, requiring a pressure vessel registration certificate and annual safety inspections. The process is cumbersome and subject to numerous site restrictions, making it inaccessible to small businesses and households. Existing improved electromagnetic steam generators mostly still use electromagnetic coils to heat the outer wall of the inner tank, retaining the water storage tank and failing to address the core issues of scale buildup, pressure vessel regulation, high thermal inertia, and long preheating times. Furthermore, some spray-type steam generators on the market use resistance wires as heating elements, resulting in uneven heating, susceptibility to dry burning and damage, inability to separate water and electricity, and short lifespan, making long-term stable operation impossible. Therefore, developing a tankless, scale-free steam generator that produces steam instantly, is safe and efficient, and does not require annual pressure vessel registration and inspection has become a pressing technical problem in this field. Summary of the Invention
[0003] The purpose of this invention is to overcome the shortcomings of the prior art and solve the core problems of existing equipment, such as pressure vessel safety hazards, low heating efficiency, serious scaling, slow start-up and shutdown response, and cumbersome maintenance. It provides an electromagnetic heating spray-type tankless steam generator that achieves the technical effects of pressure vessel-free design, instant steam output upon startup, less scaling in water, and efficient and stable operation. Attached Figure Description Figure 1 This is a cross-sectional view of the overall structure of the present invention. Figure 2This is a top view of the layout of the metal vaporization plate and nozzle of the present invention. Figure 3 This is a schematic diagram of the electromagnetic heating component structure of the present invention. Figure 4 This is a block diagram of the control system principle of the present invention. Figure 5 This is a schematic diagram of the water system principle of the present invention. Figure 6 This is a flowchart of the steam generation method of the present invention. To achieve the above objectives, the present invention adopts the following technical solution: an electromagnetic heating spray-type linerless steam generator, comprising a shell (1), an electromagnetic heating assembly (3), a metal vaporization plate (2), a spray assembly (6), a temperature sensor (10), a controller (11), and a steam guide hood (12); the electromagnetic heating assembly (3) includes an electromagnetic coil (4) and a heat insulation layer (5), the metal vaporization plate (2) is horizontally arranged directly above the electromagnetic coil (4), and the heat insulation layer (5) covers the outer periphery and bottom of the electromagnetic coil (4) to prevent heat from being transferred downwards; the spray... The spray assembly (6) includes a water pump (7), a water pipe (8), and a nozzle (9). The water pipe (8) connects the water pump (7) and the nozzle (9). The nozzle (9) is positioned facing the upper surface of the metal vaporization plate (2). A temperature sensor (10) is tightly attached to the bottom of the metal vaporization plate (2). A controller (11) is electrically connected to the electromagnetic heating assembly (3), the water pump (7), and the temperature sensor (10) to form a closed-loop control system. A steam guide hood (12) is placed above the metal vaporization plate (2), and a steam outlet (13) is opened at the top for collecting and discharging steam. Furthermore, the metal vaporization plate (2) is made of magnetically conductive and high-temperature resistant stainless steel plate. Multiple guide grooves (14) are evenly opened on the plate surface, which allows the sprayed water to spread evenly along the grooves, increasing the contact area between the water and the high-temperature plate surface and improving the vaporization efficiency. Furthermore, the spray assembly (6) includes a water pump (7), a water pipe (8), and multiple nozzles (9). The nozzles (9) are atomizing nozzles, evenly distributed in a matrix above the metal vaporization plate (2), and the spray range completely covers the upper surface of the metal vaporization plate (2), ensuring uniform water spraying. Furthermore, the electromagnetic heating assembly (3) includes a disc-wound electromagnetic coil (4), a heat insulation layer (5), and a high-frequency inverter module (15). The high-frequency inverter module can convert industrial frequency AC power into high-frequency AC power, causing the electromagnetic coil (4) to generate an alternating magnetic field. The heat insulation layer (5) uses high-temperature resistant nano-insulation material, effectively preventing heat from being transferred downwards. Furthermore, the equipment eliminates the traditional water storage tank and adopts a tankless spray instantaneous vaporization structure. The water vaporizes instantly only when sprayed onto the high-temperature plate surface, eliminating the long-term water storage process, thus preventing scale formation from the source and completely eliminating the safety risks of pressure vessels. Furthermore, the controller (11) has a built-in temperature control program that can receive the temperature signal transmitted by the temperature sensor (10) in real time. Based on the real-time temperature of the metal vaporization plate (2), it automatically adjusts the water flow rate of the water pump (7) and the heating power of the electromagnetic heating component (3) to form a closed-loop regulation of temperature-power-water volume, maintaining the plate surface temperature stably within the vaporization range of 180-300℃. Furthermore, the controller (11) is connected to a safety protection module (23), which includes an over-temperature protection unit, a water shortage protection unit, an overcurrent protection unit, and a leakage protection unit. Under abnormal conditions, it can immediately cut off the power supply and issue an alarm signal, achieving multiple safety protections.Furthermore, the water inlet of the spray assembly (6) is sequentially connected to a water inlet (20), a filter (16), a pressure regulating valve (17), and a check valve (18). The filter (16) can filter impurities in the water to prevent clogging of the nozzle (9), the pressure regulating valve (17) can stabilize the water inlet pressure, and the check valve (18) can prevent water backflow. Furthermore, the inner wall of the steam guide hood (12) is provided with a steam-water separation baffle (19). The steam-water separation baffle (19) is an inclined baffle plate, which can intercept liquid water droplets entrained in the steam and fall back onto the metal vaporization plate (2) for re-vaporization, thereby improving the dryness of the output steam. Furthermore, the shell (1) is divided into three independent modular cavities: an upper cavity, a middle cavity, and a lower cavity. The upper cavity is a steam generation cavity, which contains a metal vaporization plate (2), a spray assembly (6), and a steam guide hood (12). The middle cavity is a heating cavity, which contains an electromagnetic heating assembly (3). The lower cavity is a control cavity, which contains a controller (11), a water pump (7), and a power module. A heat insulation sealing layer is set between each cavity. The modular structure facilitates disassembly and maintenance. Beneficial effects
[0004] 1. No pressure vessel risks and extremely low usage threshold: It adopts a linerless structure, does not fall under the scope of special equipment supervision, does not require a usage registration certificate, and is exempt from the periodic annual inspection process. Small businesses and family users can use it in compliance with regulations.
[0005] 2. Complete separation of water and electricity, greatly improving safety: The metal vaporization plate is heated by electromagnetic induction, and the heating components have no direct contact with the water. With multiple safety protections, safety hazards such as leakage, dry burning, and overpressure explosion are eliminated.
[0006] 3. Eliminate scale buildup at the source and significantly extend equipment life: Without a long-term water storage and heating process, calcium and magnesium ions in the water cannot precipitate and adhere to form scale, eliminating the need for regular scale cleaning. The equipment's lifespan is 3-5 times longer than that of traditional equipment.
[0007] 4. Instant steam production and significant energy savings: Electromagnetic induction heating heats up rapidly, reaching the set temperature of the metal vaporization plate within 3-5 seconds, generating qualified steam instantly upon startup without the need for prolonged preheating. Overall energy consumption is reduced by more than 40% compared to traditional equipment.
[0008] 5. Closed-loop intelligent control, stable steam output: The controller realizes fully automatic closed-loop regulation of temperature, power and water volume, and can continuously output high dryness steam with a dryness of over 98%, without steam pressure and flow fluctuation problems.
[0009] 6. Modular structure design, extremely low operation and maintenance costs: The whole machine adopts a modular layered design, with a simple and compact structure and no complex and easily damaged parts. Only periodic cleaning of the filter and inspection of the nozzle are required in the later stage, without the need for professional maintenance.
Claims
1. An electromagnetic heating shower type inner containerless steam generator comprising a housing (1), a heating mechanism, a vaporizing member, a shower mechanism, a temperature detecting member, a controller, characterized in that, The heating mechanism is an electromagnetic heating assembly (3), the vaporization component is a metal vaporization plate (2), the spraying mechanism is a spraying assembly (6), and the temperature detection component is a temperature sensor (10). The metal vaporization plate (2) is horizontally installed in the middle of the housing (1), and the electromagnetic heating assembly (3) is located directly below the metal vaporization plate (2) for heating the metal vaporization plate (2) through electromagnetic induction. The nozzles (9) of the spraying assembly (6) are arranged facing the upper surface of the metal vaporization plate (2) for uniformly spraying water onto the high-temperature plate surface. Water body; the temperature sensor (10) is closely attached to the bottom of the metal vaporization plate (2) for real-time detection of the plate surface temperature. The controller (11) is electrically connected to the electromagnetic heating component (3), the spray component (6), and the temperature sensor (10) to form a closed-loop control system of temperature-power-water volume. The shell (1) has no water storage tank inside and adopts a spray instantaneous vaporization structure. A steam guide hood (12) is provided on the top of the metal vaporization plate (2), and a steam outlet (13) is opened on the top of the steam guide hood (12).
2. The steam generator according to claim 1, characterized in that, The metal vaporization plate (2) is made of magnetically conductive and high-temperature resistant stainless steel plate or carbon steel plate, and multiple flow-guiding grooves (14) are evenly opened on the plate surface. The flow-guiding grooves (14) can be any one of parallel straight line type, crisscross grid type or annular radial type.
3. The steam generator according to claim 1, characterized in that, The spray assembly (6) includes a water pump (7), a water pipe (8) and multiple nozzles (9). The nozzles (9) are atomizing nozzles, which are evenly distributed above the metal vaporization plate (2) in a matrix or double-line symmetrical pattern. The spray range of all nozzles (9) completely covers the upper surface of the metal vaporization plate (2).
4. The steam generator according to claim 1, characterized in that, The electromagnetic heating assembly (3) includes a disc-shaped wound electromagnetic coil (4), a heat insulation layer (5) and a high-frequency inverter module (15). The heat insulation layer (5) covers the bottom and outer periphery of the electromagnetic coil (4). The upper surface of the electromagnetic coil (4) is arranged parallel to the lower surface of the metal vaporization plate (2) with a spacing of 2-8 mm.
5. The steam generator according to claim 1, characterized in that, The controller (11) has a built-in temperature control program, which presets the working temperature range of the metal vaporization plate (2) to be 180-300℃. When the plate temperature is lower than the lower limit of the range, the controller (11) automatically increases the output power of the electromagnetic heating component (3) and reduces the spray volume of the spray component (6). When the plate temperature is higher than the upper limit of the range, the controller (11) automatically reduces the output power of the electromagnetic heating component (3) and increases the spray volume of the spray component (6).
6. The steam generator according to claim 1, characterized in that, The controller (11) is connected to a safety protection module (23), which includes an over-temperature protection unit, a water shortage protection unit, an overcurrent protection unit and a leakage protection unit. It can automatically cut off the power supply and issue an alarm signal under abnormal conditions.
7. The steam generator according to claim 1, characterized in that, The water inlet of the spray assembly (6) is connected in sequence to a water inlet (20), a filter (16), a pressure regulating valve (17) and a one-way valve (18). The filter (16) is a precision Y-type filter with a filtration accuracy of not less than 50μm. The steam generator according to claim 1 is characterized in that the inner wall of the steam guide shroud (12) is provided with a steam-water separation baffle (19), which is an inclined baffle plate used to intercept liquid water droplets entrained in the steam and improve the dryness of the steam.
8. The steam generator according to claim 1, characterized in that, The housing (1) is divided into three independent modular cavities: an upper cavity, a middle cavity, and a lower cavity. The upper cavity is a steam generating cavity, which contains a metal vaporization plate (2), a spray assembly (6), and a steam guide hood (12). The middle cavity is a heating cavity, which contains an electromagnetic heating assembly (3). The lower cavity is a control cavity, which contains a controller (11), a water pump (7), and a power module.
9. The steam generator according to claim 1, characterized in that, The controller (11) has a built-in wireless communication module (24) that supports WIFI, Bluetooth or 4G communication, and can realize remote start and stop, parameter setting and operation data collection and uploading.