Steam generator

Abstract

The utility model discloses a steam generator which is characterized in that a high-frequency coil and a magnetic induction heating rod are combined for heating in a steam generating bin, and a plurality of evaporation holes are formed in the magnetic induction heating rod. When water is heated in the evaporation holes, the evaporation holes can prevent bubbles generated by boiling from being combined with one another and destroy tension water to restrain the bubbles from being increased. After the bubbles are timely damaged, the liquid level is prevented from rolling over, so that the noise caused by bubble burst is remarkably reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of steam generating devices, and in particular to a steam generator. Background Technology

[0002] Current steam generators are generally divided into boiling water type and instantaneous type. Both types share the same working principle: water is first boiled using a resistance wire, and then evaporated. Under this principle, when water is heated to boiling, steam bubbles are generated, causing the liquid surface to churn and producing considerable noise. This is especially true when the water is fully boiled, as the traditional heating method causes the bubbles to churn from the bottom to the surface, growing larger and eventually bursting, resulting in even greater noise and a poor user experience. Utility Model Content

[0003] The present invention provides a steam generator that aims to solve the problem that existing steam generators generate bubbles when water boils, causing the liquid surface to churn and producing significant noise.

[0004] This utility model provides a steam generator, comprising: a steam generating chamber for containing water; a water circulation assembly including a water supply pipe connected to the steam generating chamber; an exhaust pipe disposed at the top of the steam generating chamber; and a heating assembly including a magnetic heating rod and a high-frequency coil, the high-frequency coil surrounding the outer periphery of the steam generating chamber, the magnetic heating rod being disposed vertically inside the steam generating chamber, and the magnetic heating rod having multiple evaporation holes.

[0005] In the steam generator provided by this utility model, the evaporation holes are formed by opening from the top and / or the periphery of the magnetic heating rod and extending downward.

[0006] In the steam generator provided by this utility model, the evaporation hole includes a hollow cavity, and the evaporation hole is formed by multiple interconnected hollow cavities connected in series.

[0007] In the steam generator provided by this utility model, the hollow cavity is spherical, and a connecting hole is provided at the connection between adjacent hollow cavities. The diameter of the connecting hole is smaller than the diameter of the hollow cavity.

[0008] In the steam generator provided by this utility model, a connecting hole is provided at the connection point of the hollow cavity, and the diameter of the connecting hole is smaller than the diameter of the hollow cavity.

[0009] In the steam generator provided by this utility model, the magnetic heating rod includes an underwater part and an above-water part. The underwater part is connected to the steam generating chamber, and the above-water part is located above the underwater part. A water replenishment hole is provided on the bottom periphery of the underwater part. The evaporation hole opens from the above-water part and extends from the above-water part to the underwater part. The evaporation hole communicates with the water replenishment hole.

[0010] In the steam generator provided by this utility model, the steam generating chamber includes a top cover and a bottom cover, the top cover and the bottom cover are detachably fastened together, the magnetic heating rod is connected to the side of the bottom cover facing the top cover, the water supply pipe is connected to the top cover, and the steam outlet pipe is located at the top of the top cover.

[0011] In the steam generator provided by this utility model, the high-frequency coil is surrounded on the outer periphery of the bottom cover, the upper water part is located inside the top cover, and the lower water part is located inside the bottom cover.

[0012] The steam generator provided by this utility model also includes a pressure sensor, which is located on the top of the top cover.

[0013] In the steam generator provided by this utility model, the water circulation assembly further includes a drain pipe, which is located at the bottom of the top cover.

[0014] The steam generator provided by this utility model also includes a temperature sensor, which is located on the top of the top cover.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] In this invention, a combination of a high-frequency coil and a magnetic heating rod is used in the steam generating chamber for heating, with multiple evaporation holes formed on the magnetic heating rod. When water is heated in the evaporation holes, the holes prevent the bubbles generated by boiling from combining and disrupt the surface tension of the water, thus inhibiting the bubbles from growing larger. After the bubbles are promptly broken, the liquid surface is prevented from churning, significantly reducing noise caused by bubble bursts and improving the user experience. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1This is a schematic cross-sectional view of the steam generator according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic cross-sectional view of the steam generator top cover and bottom cover when separated according to an embodiment of the present invention;

[0020] Figure 3 This is a front view of an exploded view of the steam generator according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the bottom cover portion of the steam generator according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the external three-dimensional structure of the bottom cover portion of the steam generator according to an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the internal three-dimensional structure of the top cover portion of the steam generator according to an embodiment of the present invention;

[0024] Figure 7 This is a partial structural schematic diagram of the magnetic heating rod of the steam generator in an embodiment of this utility model;

[0025] Figure 8 This is a cross-sectional three-dimensional schematic diagram of the magnetic heating rod of the steam generator in an embodiment of this utility model;

[0026] Figure 9 This is a cross-sectional schematic diagram of the magnetic heating rod of the steam generator in an embodiment of this utility model.

[0027] Figure label explanation:

[0028] 1. Steam generating chamber; 11. Top cover; 12. Bottom cover;

[0029] 21. Water supply pipe; 22. Drainage pipe;

[0030] 31. Air outlet pipe;

[0031] 41. Magnetic heating rod; 411. Evaporation hole; 412. Hollow cavity; 413. Water inlet hole; 414. Upper part; 415. Underwater part; 416. Connection hole; 42. High-frequency coil;

[0032] 51. Pressure sensor; 52. Temperature sensor. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0035] This invention provides a steam generator designed to solve the problem of excessive noise caused by bubbles generating during water boiling in existing steam generators. (See reference...) Figures 1 to 9The steam generator of the present invention includes: a steam generating chamber 1 for containing water; a water circulation assembly including a water supply pipe 21 connected to the steam generating chamber 1; an exhaust pipe 31 disposed at the top of the steam generating chamber 1; and a heating assembly including a magnetic heating rod 41 and a high-frequency coil 42, the high-frequency coil 42 surrounding the outer periphery of the steam generating chamber 1, and the magnetic heating rod 41 disposed vertically inside the steam generating chamber 1, the magnetic heating rod 41 having multiple evaporation holes 411. The steam generating chamber 1 is used to contain water and is connected to a water source through the water supply pipe 21 to form a water circulation. The key function of the water circulation assembly is to introduce an appropriate amount of water into the steam generating chamber 1 through the water supply pipe 21 to ensure that there is sufficient water in the steam generator for heating and generating steam. An exhaust pipe 31 is disposed at the top of the steam generating chamber 1, and the exhaust pipe 31 delivers steam to the outside. The connections between the water supply pipe 21 and the steam outlet pipe 31 and the steam generating chamber 1 are sealed to prevent leakage of water entering the steam generating chamber 1 and steam exiting the steam generating chamber 1. The heating assembly is the core part of the steam generator, including a magnetic heating rod 41 and a high-frequency coil 42. The high-frequency coil 42 surrounds the outer periphery of the steam generating chamber 1 and heats the metal rod with a high-frequency alternating current. The magnetic heating rod 41 contains multiple evaporation holes 411, which adopt a three-dimensional mesh structure. Water can be heated within the evaporation holes 411, and the inner wall of the evaporation holes 411 increases the contact area with water, thereby improving heat transfer efficiency. Furthermore, the size of the hole walls of the evaporation holes 411 suppresses the growth of steam bubbles, preventing the bubbles generated by boiling water within the evaporation holes 411 from expanding to a certain size. Compared with traditional methods, this reduces the size of the final bursting steam bubbles on the water surface and generates less noise. The high-frequency coil 42 surrounding the outer periphery of the steam generator is electrically connected to the central control module of the equipment using the steam generator. By adjusting the heating power and frequency, the temperature and steam generation rate during the heating process can be precisely controlled. Compared with resistance wire heating, the method of using the high-frequency coil 42 and the magnetic heating rod 41 to heat the magnetic heating rod 41 through electromagnetic induction, and then relying on the high-temperature magnetic heating rod 41 to heat the water, is more efficient in controlling the heating efficiency and can significantly reduce the adjustment delay of water evaporation in the steam generation chamber 1.

[0036] In this embodiment, the steam generator of this invention heats the steam in the steam generation chamber 1 using a combination of a high-frequency coil 42 and a magnetic heating rod 41, with multiple evaporation holes 411 formed on the magnetic heating rod 41. When water is heated in the evaporation holes 411, the holes prevent the bubbles generated by boiling from combining with each other and break the surface tension of the water, inhibiting the bubbles from growing larger. After the bubbles are promptly broken, the liquid surface is prevented from churning, thus significantly reducing noise caused by bubble bursting and improving the user experience.

[0037] In one embodiment, reference is made to Figures 7 to 9 The evaporation holes 411 are formed by opening from the top and / or periphery of the magnetic heating rod 41 and extending downward. The evaporation holes 411 open from the top or periphery of the magnetic heating rod 41 and extend downward, depending on the arrangement of the magnetic heating rod 41. When the upper and lower ends of the magnetic heating rod 41 respectively abut the top and bottom surfaces of the steam generating chamber 1, the evaporation holes 411 are located on the periphery of the magnetic heating rod 41. When only the lower end of the magnetic heating rod 41 is installed on the inner bottom surface of the steam generating chamber 1, and the upper end of the magnetic heating rod 41 is exposed to the air in the steam generating chamber 1, the evaporation holes 411 can be located on the periphery and top of the magnetic heating rod 41.

[0038] In one embodiment, reference is made to Figures 7 to 9 The evaporation hole 411 includes a hollow cavity 412, which is formed by multiple interconnected hollow cavities 412 connected in series. The magnetic heating rod 41 is designed with multiple hollow cavities 412 connected in series, which form the evaporation hole 411 through interconnection. The key to this design is that by connecting multiple hollow cavities 412 in series, a continuous airflow channel is formed, which can more effectively transfer heat during water heating. Each hollow cavity 412 is equivalent to a miniature evaporation chamber. When the magnetic heating rod 41 is heated by the high-frequency coil 42, heat is transferred to the water through the metal rod. The water is rapidly heated and generates steam when it comes into contact with the inner surface of the hollow cavity 412. The series structure of multiple hollow cavities 412 can disperse air bubbles in the water during the transfer process, thereby effectively avoiding the liquid surface rolling and noise caused by air bubble accumulation in a single hole structure. In addition, multiple hollow cavities 412 form a staged vaporization chamber from bottom to top, so that water undergoes a multi-stage vaporization process of preheating, initial boiling and reboiling during the heating process, which results in faster and more complete vaporization compared to a single-cavity structure.

[0039] Furthermore, referring to Figures 7 to 9The hollow cavity 412 is spherical, and a connecting hole 416 is provided at the joints connecting the hollow cavities 412. The diameter of the connecting hole 416 is smaller than the diameter of the hollow cavity 412. The spherical hollow cavity 412 has the largest volume-to-surface area ratio, providing a larger heat exchange area than other shapes within the same volume. The curved surface of the inner wall of the spherical hollow cavity 412 creates a vortex effect in the water flow, prolonging the residence time of water in the high-temperature region and improving vaporization efficiency. When bubbles grow within the spherical cavity 412, they are constrained by the uniform curved surface. When entering adjacent cavities through narrow connecting channels, the bubbles are forced to be divided into smaller sizes. Narrow connecting holes 416 are provided at the joints of the interconnected hollow cavities 412. When the high-frequency coil 42 is working, eddy current heating first occurs at the connecting holes 416 of each hollow cavity 412, forming local high-temperature points. After water enters, it partially and rapidly vaporizes in these narrow connecting holes 416, and the generated steam pushes the liquid water towards adjacent hollow cavities 412. When water is heated and boils within the spherical hollow cavity 412, bubbles are forced into smaller sizes as they pass through the narrow connecting hole 416, effectively suppressing the formation of large bubbles and reducing noise. Furthermore, the narrow connecting hole 416 limits scale deposition. When steam passes through the connecting hole 416 at high speed, a micro-scouring effect is generated, thereby reducing the risk of scaling. In terms of manufacturing process, the magnetic heating rod 41 in this embodiment employs precision 3D printing or powder metallurgy sintering technology to ensure the surface smoothness of the hollow cavity 412.

[0040] In one embodiment, reference is made to Figures 7 to 9The magnetic heating rod 41 includes an underwater part 415 and an above-water part 414. The underwater part 415 is connected to the steam generating chamber 1, and the above-water part 414 is located above the underwater part 415. A water inlet hole 413 is provided on the bottom periphery of the underwater part 415. An evaporation hole 411 opens from the above-water part 414 and extends from the above-water part 414 to the underwater part 415. The evaporation hole 411 communicates with the water inlet hole 413. The magnetic heating rod 41 of the steam generator is divided into an above-water part 414 and an underwater part 415, wherein the above-water part 414 is located above the underwater part 415. A water inlet hole 413 is provided on the bottom periphery of the underwater part 415, while the upper part 414 has an evaporation hole 411 extending downward from its top. The evaporation hole 411 runs through the entire upper part 414 and extends to the underwater part 415, communicating with the water inlet hole 413 of the underwater part 415. When steam is generated, the water level is controlled below the upper part 414. Because the evaporation hole 411 is located in the upper part 414 and not in the underwater part 415, the steam generated inside the evaporation hole 411 of the magnetic heating rod 41 will be ejected from the upper part 414, which is not submerged in water. If the upper part 414 is not provided, and the entire magnetic heating rod 41 is submerged in water, bubbles will still form in the water after the steam leaves the evaporation hole 411 and burst on the water surface, still producing considerable noise. Therefore, an upper part 414 and a lower part 415 are designed to prevent the evaporation holes 411 from being submerged in water, allowing the steam to be directly injected into the air in the steam generating chamber 1, further reducing noise. To ensure the replenishment and circulation of water in the evaporation holes 411 within the magnetic heating rod 41, water replenishment holes 413 are designed and arranged on the bottom periphery of the lower part 415, and these holes 413 are submerged in water. The interconnected design of the water replenishment holes 413 and the evaporation holes 411 establishes a natural circulation system, enabling continuous water replenishment through the siphon effect without the need for additional power.

[0041] In one embodiment, reference is made to Figures 1 to 6The steam generating chamber 1 includes a top cover 11 and a bottom cover 12, which are detachably fastened together. A magnetic heating rod 41 is connected to the side of the bottom cover 12 facing the top cover 11. A water supply pipe 21 is connected to the top cover 11, and an exhaust pipe 31 is located at the top of the top cover 11. The steam generating chamber 1 consists of two parts: a top cover 11 and a bottom cover 12, which are detachably fastened together via a flange connection. A high-temperature resistant silicone sealing ring is installed at the connection point to ensure good airtightness under steam pressure. Both the top cover 11 and the bottom cover 12 are made of corrosion-resistant and high-temperature resistant materials, such as POM, and their inner surfaces are anodized to improve heat resistance and anti-scaling performance. The magnetic heating rod 41 is vertically fixed to the center of the bottom cover 12 via a threaded connection, and a heat-insulating gasket is used at the connection point to slow down the heat transfer to the bottom cover 12. The underwater portion 415 of the heating rod is completely placed within the water-containing cavity formed by the bottom cover 12, while the upper portion 414 extends into the space of the top cover 11. This arrangement ensures that the underwater portion 415 of the heating rod is in full contact with the water, while the area where the upper portion 414 is located retains sufficient space for steam expansion. The water supply pipe 21 is connected to the water inlet located on the top of the top cover 11 using a sealed quick-release connector. The steam outlet pipe 31 is located near the edge of the top of the top cover 11 and has an internal umbrella-shaped water-blocking structure to effectively prevent water droplets from being carried out by the steam. In this embodiment, the modularly assembled steam generation chamber 1 simplifies the production process and assembly difficulty, reducing manufacturing costs. Furthermore, the rigid connection between the magnetic heating rod 41 and the bottom cover 12 ensures the stability of the fixed structure in equipment such as a steam generator that is subject to high-frequency vibration.

[0042] In one embodiment, reference is made to Figures 1 to 5 The high-frequency coil 42 is wrapped around the outer periphery of the bottom cover 12, the upper part 414 is located inside the top cover 11, and the lower part 415 is located inside the bottom cover 12. The high-frequency coil 42 is located on the outer periphery of the bottom cover 12 primarily for ease of installation; the pre-wound high-frequency coil 42 only needs to be fitted over the bottom cover 12. When disassembling the steam generator chamber 1, the user only needs to remove the top cover 11 for maintenance, without needing to disassemble the high-frequency coil 42. Furthermore, since the lower part 415 is located inside the bottom cover 12 and the upper part 414 is located inside the top cover 11, the lower part 415 has a stronger magnetic induction intensity when the high-frequency coil 42 is working, allowing the heating energy of the submerged lower part 415 to be more concentrated, thus heating the water in the evaporation holes 411 within the lower part 415 more quickly. The upper part 414, being above the liquid surface, does not directly contact the water; therefore, to avoid overheating, it is located inside the top cover 11. The solution of this embodiment can concentrate the magnetic effect of the high-frequency coil 42 mainly in the underwater region of the magnetic heating rod 41, thereby improving the heating efficiency.

[0043] In one embodiment, reference is made to Figures 1 to 3 and Figure 6 The steam generator also includes a pressure sensor 51, which is located on the top of the top cover 11. The pressure sensor 51 is a MEMS piezoresistive sensor, fixed to the top of the top cover 11 via a threaded connection, with its sensing surface directly exposed to the steam chamber inside the top cover 11. Inside the top cover 11, a stainless steel sintered filter is installed in front of the sensor probe to prevent water droplets from directly impacting the sensing element and to ensure rapid response to steam pressure. A silicone heat insulation layer is wrapped around the sensor to prevent thermal damage to electronic components from high-temperature steam. The steam generator is used to reflect the actual working pressure of the steam generation chamber 1. By accurately measuring the internal pressure, the pressure sensor 51 helps the control system adjust the water input according to pressure changes, thereby maintaining the steam generator in ideal operating conditions and avoiding malfunctions or performance degradation due to excessively high or low pressure. Once the pressure sensor 51 detects that the steam pressure exceeds a predetermined threshold, the control system will automatically adjust the water intake or activate other protection mechanisms to prevent excessive steam discharge caused by excessive pressure, resulting in a "whistling" sound and improving the user experience.

[0044] In one embodiment, reference is made to Figures 3 to 5 The water circulation assembly also includes a drain pipe 22, which is located at the bottom of the top cover 11. The drain pipe 22 is connected to a drain port on the bottom side of the top cover 11 via a quick-connect fitting. The drain pipe 22's primary function is to drain water from the steam generation chamber 1 after the steam generator has finished operating, thus preventing scale buildup inside the bottom cover 12 due to prolonged storage and ensuring continuous and efficient operation of the equipment. Simultaneously, the drain pipe 22 discharges some water when the water temperature flowing into the water supply pipe 21 is too low, requiring a longer time to boil, thereby lowering the water level and quickly generating steam, preventing users from waiting for steam to be generated for extended periods in cold environments. Furthermore, a solenoid valve is installed inside the drain pipe 22. When the steam generator system receives an abnormal pressure increase detected by the pressure sensor 51, it can quickly depressurize the steam generation chamber 1 by draining water through the drain pipe 22. In addition, the system can initiate a drainage procedure when it detects excessive turbidity in the water, or automatically drain residual water when the steam generator stops to prevent scaling.

[0045] In one embodiment, reference is made to Figures 1 to 3 and Figure 6The steam generator also includes a temperature sensor 52. The temperature sensor 52, like the pressure sensor 51, is located on the top of the steam generator's cover 11 and is primarily used to monitor the internal temperature of the steam generator. The probe of the temperature sensor 52 extends into the cover 11. By monitoring the temperature inside the steam generation chamber 1 in real time, the temperature sensor 52 ensures that the temperature during the heating process does not exceed the tolerance range of the metal rod, thereby preventing overheating that could cause metal deformation, melting, or damage.

[0046] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A steam generator, characterized in that, include: Steam generator chamber, used to hold water; A water circulation assembly includes a water supply pipe connected to the steam generation chamber; An exhaust pipe is located at the top of the steam generating chamber; The heating assembly includes a magnetic heating rod and a high-frequency coil. The high-frequency coil surrounds the outer periphery of the steam generating chamber, and the magnetic heating rod is arranged vertically inside the steam generating chamber. The magnetic heating rod has multiple evaporation holes.

2. The steam generator according to claim 1, characterized in that, The evaporation holes are formed by opening from the top and / or periphery of the magnetic heating rod and extending downwards.

3. The steam generator according to claim 2, characterized in that, The evaporation holes include hollow cavities, and the evaporation holes are formed by multiple interconnected hollow cavities connected in series.

4. The steam generator according to claim 3, characterized in that, The hollow cavity is spherical, and a connecting hole is provided at the connection between adjacent hollow cavities. The diameter of the connecting hole is smaller than the diameter of the hollow cavity.

5. The steam generator according to claim 2, characterized in that, The magnetic heating rod includes an underwater part and an above-water part. The underwater part is connected to the steam generating chamber, and the above-water part is located above the underwater part. A water inlet hole is provided on the bottom periphery of the underwater part. The evaporation hole opens from the above-water part and extends from the above-water part to the underwater part. The evaporation hole is connected to the water inlet hole.

6. The steam generator according to claim 5, characterized in that, The steam generating chamber includes a top cover and a bottom cover, which are detachably fastened together. The magnetic heating rod is connected to the side of the bottom cover facing the top cover. The water supply pipe is connected to the top cover. The steam outlet pipe is located at the top of the top cover.

7. The steam generator according to claim 6, characterized in that, The high-frequency coil is surrounded on the outer periphery of the bottom cover, the upper part is located inside the top cover, and the lower part is located inside the bottom cover.

8. The steam generator according to claim 6, characterized in that, It also includes a pressure sensor, which is located on the top of the top cover.

9. The steam generator according to claim 8, characterized in that, The water circulation assembly also includes a drain pipe located at the bottom of the top cover.

10. The steam generator according to claim 6 further includes a temperature sensor disposed on the top of the top cover.

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