A steam generating device

Abstract

The application provides a steam generating device, and relates to the technical field of steam generation. The steam generating device comprises a device main body and a heating plate. The heating plate comprises a substrate and a heating layer. The substrate is connected with the device main body, and a cavity is formed between the substrate and the device main body. The device main body is provided with a water inlet pipe and a steam outlet pipe which are in communication with the cavity. The heating layer is arranged on the plate surface of the substrate away from the cavity, so as to heat the water in the cavity when the heating layer generates heat. The steam generating device can improve the uniformity of temperature rise and the thermal efficiency.

Description

Technical Field

[0001] This application relates to the field of steam generation technology, and more specifically, to a steam generating apparatus. Background Technology

[0002] With the continuous development of home appliance technology, ironing products, as an important tool in daily life, are receiving increasing attention from consumers regarding their performance and efficiency. Traditional ironing products typically use metal heating elements as their core heating components, with aluminum and copper heating elements being widely used due to their excellent thermal conductivity. The working principle of these heating elements is that heat is transferred to the entire metal heating element by passing an electric current through a resistance wire, thereby generating steam for ironing.

[0003] Because the resistance wire is usually arranged in a spiral or coiled manner, the distance between different parts of the heating element and the resistance wire varies. Areas closer to the resistance wire heat up first, while areas farther away take longer to reach the required temperature. This heating characteristic not only affects the uniformity of heating of the heating element but also leads to a reduction in overall thermal efficiency. Utility Model Content

[0004] The purpose of this application includes, for example, providing a steam generator that can improve heating uniformity and thermal efficiency.

[0005] The embodiments of this application can be implemented as follows: An embodiment of this application provides a steam generator, which includes a main body and a heating plate. The heating plate includes a base plate and a heating layer. The base plate is connected to the main body, and a cavity is formed between the base plate and the main body. The main body is provided with a water inlet pipe and a steam outlet pipe communicating with the cavity. The heating layer is disposed on the plate surface of the base plate away from the cavity, so as to heat the water in the cavity when heating.

[0006] Optionally, an insulating layer is provided on the heating layer to cover the heating layer.

[0007] Optionally, the thickness of the substrate is less than 5 mm, and the thickness of the heating layer is less than 1 mm.

[0008] Optionally, the main body of the device may be provided with two water level detection devices at different heights along the thickness direction of the substrate.

[0009] Optionally, in the thickness direction of the substrate, one of the water level detection devices is located at 15% to 25% of the cavity height, and the other water level detection device is located at 50% to 60% of the cavity height.

[0010] Optionally, the water level detection device includes a fixed bracket and a probe. The fixed bracket is disposed outside the main body of the device, one end of the probe is fixed to the fixed bracket, and the other end of the probe passes through the cavity.

[0011] Optionally, the main body of the device has a mounting hole, the probe is covered with a sealing element, the sealing element is partially inserted through the mounting hole, and one end of the probe extends through the mounting hole into the cavity.

[0012] Optionally, the device body is provided with a pressure relief valve seat, the device body has a first through hole, the pressure relief valve seat has a second through hole, the top of the pressure relief valve seat has a pressure relief hole communicating with the second through hole, and the second through hole is provided with an elastic component for blocking the first through hole. The elastic component is used to release the blockage of the first through hole under pressure, so that the first through hole and the second through hole are connected.

[0013] Optionally, the elastic component includes a spring and a washer, one end of the spring being connected to the inner top wall of the pressure relief valve seat, and the other end of the spring being connected to the washer. The washer is used to block the first through hole and to compress the spring under pressure.

[0014] Optionally, the main body of the device is provided with multiple diversion holes, all of which are connected to the water inlet pipe and face different areas of the substrate.

[0015] The beneficial effects of the steam generating device provided in this application include, for example, that by setting a heating layer on the plate surface of the substrate away from the cavity, the heating layer itself has good thermal response performance, which can reach the target temperature in a short time and ensure that the water in the cavity is heated evenly. Therefore, the preheating time for steam generation can be significantly shortened. The heating method using the heating layer avoids the problem of uneven temperature distribution caused by inconsistent heat transfer paths in traditional resistance wire heating, thereby improving heating efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the steam generator from a first-view perspective in an embodiment of this application; Figure 2This is a schematic diagram of the steam generator from a second perspective in an embodiment of this application; Figure 3 This is a partial cross-sectional view of the heating plate in an embodiment of this application; Figure 4 This is a partial cross-sectional view showing the water level detection device in the steam generator in an embodiment of this application; Figure 5 This is a partial cross-sectional view showing the internal structure of the pressure relief valve seat in the steam generator in this embodiment of the application; Figure 6 This is a cross-sectional view of the diversion orifice in the steam generator shown in the embodiments of this application.

[0018] Icons: 100-Main body of the device; 110-Water inlet pipe; 120-Steam outlet pipe; 130-Mounting hole; 140-Pressure relief valve seat; 141-Second through hole; 142-Pressure relief hole; 143-Spring; 144-Gasket; 150-First through hole; 160-Diverter hole; 170-Thermostat; 200-Heating plate; 210-Base plate; 220-Heating layer; 230-Inner insulation layer; 240-Outer insulation layer; 300-Cavity; 400-Water level detection device; 410-Fixing bracket; 420-Probe; 421-Seal. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0023] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0024] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0025] Please refer to Figures 1-3 The embodiments of this application provide a steam generating device, including a device body 100 and a heating plate 200. The heating plate 200 includes a substrate 210 and a heating layer 220. The substrate 210 is connected to the device body 100, and a cavity 300 is formed between the substrate 210 and the device body 100. The device body 100 is provided with a water inlet pipe 110 and a steam outlet pipe 120 communicating with the cavity 300. The heating layer 220 is disposed on the plate surface of the substrate 210 facing away from the cavity 300, so as to heat the water in the cavity 300 when heating.

[0026] The substrate 210 is connected to the device body 100 by screws or brazing. A cavity 300 for containing water is formed between the substrate 210 and the device body 100. The water inlet pipe 110 and the steam outlet pipe 120 realize the input of water and the output of steam, respectively. The heating layer 220 is disposed on the side of the substrate 210 away from the cavity 300. When the power is applied and the water is heated, the water in the cavity 300 is vaporized by heat conduction on the substrate 210.

[0027] Specifically, the heating layer 220 is disposed on the side of the substrate 210 away from the cavity 300, meaning it does not directly contact the water. Instead, it transfers heat to the water within the cavity 300 through conduction heating of the substrate 210. This heating method avoids the uneven temperature distribution problem caused by inconsistent heat transfer paths in traditional resistance wire heating, thereby improving heating efficiency and ensuring uniform heating of the water within the cavity 300. Because the heating layer 220 itself has excellent thermal response performance, it can reach the target temperature in a short time, thus significantly shortening the preheating time for steam generation.

[0028] The substrate 210 serves as the heat-conducting medium, and its material is preferably a metal with good thermal conductivity to ensure that the heat generated by the heating layer 220 can be rapidly and evenly distributed throughout the cavity 300 area. The heating layer 220 is connected to electrodes, and its structure can be a single-piece or strip circuit, preferably in parallel circuit form to improve the overall heating stability and reliability. During the heating process, heat is conducted from the substrate 210 to the cavity 300, causing the water entering the cavity 300 to reach its vaporization temperature in a short time, thereby releasing steam through the steam outlet pipe 120. The main body 100 of the device is also equipped with a temperature controller 170 electrically connected to the heating layer 220 to control the temperature of the heating layer 220 and prevent overheating.

[0029] In some embodiments, an insulating layer covering the heating layer 220 is provided on the heating layer 220.

[0030] An insulating layer is disposed on the outer surface of the heating layer 220 to provide electrical insulation and thermal protection for the heating layer 220. Since the heating layer 220 needs to be energized and generate heat during operation, if its surface is not insulated, it may pose safety hazards such as short circuits or leakage due to contact with external structures or water. Therefore, by providing an insulating layer covering the heating layer 220, direct contact between it and external conductive media can be effectively isolated while ensuring the normal operation of the heating layer 220, thereby improving the safety and reliability of the entire steam generator.

[0031] This design not only prevents electrical breakdown or leakage of the heating layer 220 during operation, but also plays a role in concentrating heat conduction to a certain extent, reducing heat loss to the external environment, thereby improving the heat conduction efficiency of the heating layer 220 to the substrate 210. Since the heating layer 220 is wrapped by an insulating layer, its heating energy can be transferred to the substrate 210 more concentratedly, thereby improving the heating efficiency of the water in the cavity 300.

[0032] When the substrate 210 is made of a conductive material, an inner insulating layer 230 is provided between the heating layer 220 and the substrate 210, and an outer insulating layer 240 is provided on the side of the heating layer 220 away from the substrate 210. The inner insulating layer 230 and the outer insulating layer 240 together form a wrapping around the heating layer 220. The connection between the heating layer 220, the insulating layer and the substrate 210 can be achieved by processes such as printing sintering or vapor deposition.

[0033] In some embodiments, the thickness of the substrate 210 is less than 5 mm, and the thickness of the heating layer 220 is less than 1 mm.

[0034] The substrate 210 serves as the heat-conducting medium between the heating layer 220 and the cavity 300, and its thickness directly affects the heat transfer efficiency. When the substrate 210 is thinner, the time required for heat to be conducted from the heating layer 220 to the cavity 300 is correspondingly shortened, thereby accelerating the overall heating response speed. Controlling the thickness of the substrate 210 to below 5mm can significantly improve the heat transfer efficiency while ensuring structural strength, enabling the water in the cavity 300 to reach its vaporization temperature in a shorter time.

[0035] Meanwhile, the thickness of the heating layer 220 is limited to less than 1 mm, a design intended to improve its thermal response performance. Since the heating layer 220 is itself a heating element, its smaller thickness results in lower thermal inertia, allowing it to heat up rapidly after being energized and efficiently transfer heat to the substrate 210. Furthermore, the thin-layer structure of the heating layer 220 facilitates uniform heating over a large area, avoiding uneven temperature distribution caused by uneven thickness or localized excessive thickness, thereby improving the stability of steam output.

[0036] In some embodiments, two water level detection devices 400 with different heights are provided on the main body 100 of the device along the thickness direction of the substrate 210.

[0037] Two water level detection devices 400 are respectively installed at different heights on the main body 100 of the device. This arrangement allows the water level detection devices 400 to provide real-time feedback to the control system based on the rise or fall of the water level in the cavity 300, thereby achieving coordinated control of the water intake and heating processes. One water level detection device 400 is located at a relatively low position to control the minimum required water volume; the other water level detection device 400 is located at a relatively high position to detect whether the water level in the cavity 300 is close to the safe upper limit, preventing unstable steam output or water spraying due to excessively high water levels.

[0038] The height difference between the two water level detection devices (400 units) ensures that the device can provide corresponding feedback under different water level conditions. For example, at a low water level, the control system can appropriately increase the water inlet flow, while at a high water level, it can control the water inlet to stop, thereby maintaining the water level within the cavity (300 units) within a reasonable range. Compared with a single water level detection method, this dual-point detection mechanism improves the accuracy and reliability of water level control, and helps to avoid problems such as dry burning or mixed steam and water output caused by abnormal water levels.

[0039] When the steam generator is started, the heating layer 220 begins to heat up, and at the same time, water begins to enter through the inlet pipe 110 and steam begins to exit through the outlet pipe 120, achieving a rapid steam output effect. When the water level inside the cavity 300 reaches the lower water level detection device 400, the device temperature tends to stabilize, and the water inlet pipe 110 appropriately reduces the water flow rate to ensure a stable steam output effect. When the water level inside the cavity 300 reaches the higher water level detection device 400, the water inlet pipe 110 stops entering water to ensure that the water inside the cavity 300 has sufficient space to vaporize, avoiding unstable steam output or water spraying caused by excessively high water levels.

[0040] In the thickness direction of the substrate 210, one water level detection device 400 is located at 15% to 25% of the height of the cavity 300, and the other water level detection device 400 is located at 50% to 60% of the height of the cavity 300.

[0041] The cavity 300 serves as a water-containing space, with different positions along its height corresponding to different water level states. Two water level detection devices 400 are respectively positioned within the aforementioned height range to achieve precise water level control during steam generation through segmented detection of water level changes. Specifically, the water level detection device 400 located at 15% to 25% of the cavity 300's height detects the minimum effective water level, ensuring sufficient water is injected into the cavity 300 to prevent the heating plate 200 from dry-burning due to lack of water or insufficient water, thereby avoiding structural damage or functional failure caused by dry-burning.

[0042] Another water level detection device 400 is located at 50% to 60% of the height of the cavity 300. This position is close to the upper limit of the effective volume of the cavity 300 and is used to detect whether the water level is close to the safe upper limit value during the steam generation process. When the water level rises to this height, the control system can determine that the water volume in the cavity 300 is close to the maximum allowable value and stop water intake in time to prevent the water level from being too high, which would cause liquid water to be entrained in the steam, affecting the dryness of the steam, or even causing water spraying, thus affecting the user experience and the stability of equipment operation.

[0043] Please refer to Figure 4 In some embodiments, the water level detection device 400 includes a fixed bracket 410 and a probe 420. The fixed bracket 410 is disposed outside the device body 100, one end of the probe 420 is fixed to the fixed bracket 410, and the other end of the probe 420 passes through the cavity 300.

[0044] The fixed bracket 410 serves as a support structure, located on the outer surface of the device body 100. It provides a stable mounting base for the probe 420. An insulating layer can be provided between the probe 420 and the fixed bracket 410 to prevent direct contact between the probe 420 and the fixed bracket 410 or the device body 100. The fixed bracket 410 is connected to the device body 100 via fasteners or an integral molding method, ensuring that the probe 420 will not shift or loosen due to external vibrations during use, thereby guaranteeing the accuracy and stability of water level detection.

[0045] The probe 420, a key component directly involved in water level detection, is positioned at one end by a fixing bracket 410, while the other end extends into the cavity 300, making contact with the water within the cavity. When the water level in the cavity 300 rises to the detection height of the probe 420, the water, acting as a conductive medium, forms an electrical conduction loop with the probe 420. This signal is transmitted to the control system, which can then determine whether the current water level has reached the set height. In this way, the control system can decide whether to continue or stop water intake, thereby achieving automatic adjustment and control of the water level during steam generation.

[0046] The probe 420 is preferably made of a highly corrosion-resistant conductive material, such as SUS316 / 316L stainless steel, to ensure that it can maintain good conductivity and structural stability even when in contact with water for a long time.

[0047] In some embodiments, the device body 100 is provided with a mounting hole 130, the probe 420 is covered with a sealing member 421, the sealing member 421 is partially inserted through the mounting hole 130, and one end of the probe 420 extends through the mounting hole 130 into the cavity 300.

[0048] Mounting hole 130 is formed on the device body 100, corresponding to the extension path of probe 420, to provide a channel for probe 420 to enter cavity 300. Since cavity 300 needs to contain water and withstand a certain internal pressure during steam generation, if probe 420 directly passes through device body 100 without sealing, water or steam may leak from mounting hole 130, affecting the normal operation and safety of the device. Therefore, a sealing element 421 is provided on the outside of probe 420, and this sealing element 421 is partially embedded in mounting hole 130, forming an effective sealing structure between probe 420 and device body 100, preventing water or steam leakage, thereby ensuring the sealing performance and operational stability of the device.

[0049] The sealing element 421 is preferably made of a material that is resistant to high temperature and corrosion and has good elasticity, such as a silicone rubber sealing ring. Its inner diameter matches the outer diameter of the probe 420, which can tightly wrap the probe 420. At the same time, its outer edge fits against the inner wall of the mounting hole 130 to form a double sealing effect.

[0050] This design ensures that the probe 420 can perform the water level detection function without compromising the sealing of the device body 100. The reliable sealing connection between the probe 420 and the device body 100 is achieved through the mating structure of the seal 421 and the mounting hole 130.

[0051] Please refer to Figure 5 In some embodiments, the device body 100 is provided with a pressure relief valve seat 140, the device body 100 is provided with a first through hole 150, the pressure relief valve seat 140 is provided with a second through hole 141, the top of the pressure relief valve seat 140 is provided with a pressure relief hole 142 communicating with the second through hole 141, and an elastic component for blocking the first through hole 150 is provided in the second through hole 141. The elastic component is used to release the blockage of the first through hole 150 under pressure, so that the first through hole 150 and the second through hole 141 are connected.

[0052] The first through-hole 150 is sealed during normal operation of the steam generator, and steam is discharged through the steam outlet pipe 120 to maintain pressure balance during steam generation. An elastic component is disposed within the second through-hole 141, maintaining the sealing of the first through-hole 150 through elastic force. A sealing gasket or sealing ring can be provided between the pressure relief valve seat 140 and the main body 100 of the device for sealing. The pressure relief valve seat 140 and the water inlet pipe 110 can share the same base, which helps reduce screws, sealing parts, and assembly steps.

[0053] When the internal pressure of the steam generator exceeds the set safety value due to scale buildup, blockage of the steam outlet pipe 120, or abnormal heating during operation, the pressure within the cavity 300 acts on the elastic component, causing it to compress and release the seal on the first through hole 150, thereby connecting the first through hole 150 with the second through hole 141. At this time, steam or gas can enter the second through hole 141 through the first through hole 150 and finally be discharged through the pressure relief hole 142 on the top of the pressure relief valve seat 140, thereby reducing the internal pressure of the device and preventing explosion or other safety hazards caused by excessive pressure.

[0054] This design enables the steam generator to automatically depressurize under abnormal pressure conditions, ensuring safe operation of the unit under abnormal conditions. The depressurization value ranges from 1 Bar to 6 Bar, effectively avoiding the safety risk of explosion after the unit's pressure increases.

[0055] In some embodiments, the elastic component includes a spring 143 and a washer 144. One end of the spring 143 is connected to the inner top wall of the pressure relief valve seat 140, and the other end of the spring 143 is connected to the washer 144. The washer 144 is used to block the first through hole 150 and to compress the spring 143 under pressure.

[0056] One end of the spring 143 is fixedly connected to the inner top wall of the pressure relief valve seat 140, and the other end is connected to the gasket 144. In its natural state, the spring 143 is in an extended state, using its own elasticity to press the gasket 144 against the first through hole 150, thereby maintaining a sealed state inside the device. Under the action of the spring 143, the gasket 144 can tightly fit against the opening end of the first through hole 150, ensuring no steam leakage occurs under normal operating pressure; a gap exists between the gasket 144 and the inner wall of the second through hole 141 to allow steam to escape.

[0057] When the steam generator experiences an abnormal situation during operation, causing the internal pressure to rise above the set safety threshold, the steam pressure within the cavity 300 acts on the gasket 144, subjecting it to an upward thrust that overcomes the elastic force of the spring 143. This compresses the spring 143 and causes the gasket 144 to disengage from the blocked position of the first through hole 150. At this time, a communication channel is formed between the first through hole 150 and the second through hole 141. Steam or gas can enter the second through hole 141 inside the pressure relief valve seat 140 through this channel and ultimately be discharged outside the device via the pressure relief hole 142, thereby achieving rapid release of internal pressure.

[0058] Please refer to Figure 6 In some embodiments, the main body 100 of the device is provided with a plurality of diversion holes 160, all of which are connected to the water inlet pipe 110 and face different areas of the substrate 210.

[0059] Multiple diversion holes 160 serve as communication holes between the water inlet pipe 110 and the cavity 300. These holes face different areas of the substrate 210, allowing water flowing from the inlet pipe 110 to be spatially distributed upon entering the cavity 300. This avoids uneven heating, localized overheating, or delayed steam generation caused by water concentrating in only one area of ​​the substrate 210. By uniformly distributing the water flow to different heating areas of the substrate 210, the water can be heated and vaporized more quickly within the cavity 300, thereby improving the efficiency and stability of steam output.

[0060] Because the heating layer 220 of the heating plate 200 has the characteristic of rapid heating, uneven water distribution may cause some areas to be too hot while other areas are not sufficiently heated, thus affecting the dryness and continuity of steam output. By setting multiple diversion holes 160, the water flow can quickly cover the entire surface area of ​​the substrate 210 after entering the cavity 300, thereby improving heat exchange efficiency and shortening steam generation time.

[0061] In addition, this steam generator can be used in conjunction with other steam generators. For example, other steam generators can be fed with water before this steam generator. When the other steam generators discharge a mixture of steam and water, the mixture needs to be fed back into the steam generator for secondary heating to ensure the dryness of the steam.

[0062] In summary, the embodiments of this application provide a steam generating device. By providing a heating layer 220 on one side of the substrate 210, the heating layer 220 itself has good thermal response performance and can reach the target temperature in a short time. Therefore, the preheating time for steam generation can be significantly shortened. The heating method using the heating layer 220 avoids the problem of uneven temperature distribution caused by inconsistent heat transfer paths in traditional resistance wire heating, thereby improving heating efficiency and ensuring that the water in the cavity 300 is heated evenly.

[0063] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A steam generating device, characterized in that, The device includes a main body (100) and a heating plate (200). The heating plate (200) includes a substrate (210) and a heating layer (220). The substrate (210) is connected to the main body (100), and a cavity (300) is formed between the substrate (210) and the main body (100). The main body (100) is provided with a water inlet pipe (110) and a steam outlet pipe (120) communicating with the cavity (300). The heating layer (220) is disposed on the surface of the substrate (210) facing away from the cavity (300) to heat the water in the cavity (300) when heating.

2. The steam generating device according to claim 1, characterized in that, An insulating layer is provided on the heating layer (220) to cover the heating layer (220).

3. The steam generating device according to claim 1, characterized in that, The thickness of the substrate (210) is less than 5 mm, and the thickness of the heating layer (220) is less than 1 mm.

4. The steam generating device according to claim 1, characterized in that, Two water level detection devices (400) with different heights are provided on the main body (100) of the device along the thickness direction of the substrate (210).

5. The steam generating apparatus according to claim 4, characterized in that, In the thickness direction of the substrate (210), one of the water level detection devices (400) is located at 15% to 25% of the height of the cavity (300), and the other water level detection device (400) is located at 50% to 60% of the height of the cavity (300).

6. The steam generating apparatus according to claim 4, characterized in that, The water level detection device (400) includes a fixed bracket (410) and a probe (420). The fixed bracket (410) is located outside the main body (100) of the device. One end of the probe (420) is fixed to the fixed bracket (410), and the other end of the probe (420) passes through the cavity (300).

7. The steam generating apparatus according to claim 6, characterized in that, The main body (100) of the device has an installation hole (130), and the probe (420) is covered with a sealing element (421). The sealing element (421) is partially inserted through the installation hole (130), and one end of the probe (420) extends through the installation hole (130) into the cavity (300).

8. The steam generating apparatus according to claim 1, characterized in that, The device body (100) is provided with a pressure relief valve seat (140), the device body (100) is provided with a first through hole (150), the pressure relief valve seat (140) is provided with a second through hole (141), the top of the pressure relief valve seat (140) is provided with a pressure relief hole (142) communicating with the second through hole (141), the second through hole (141) is provided with an elastic component for blocking the first through hole (150), the elastic component is used to release the blockage of the first through hole (150) under pressure, so that the first through hole (150) and the second through hole (141) are connected.

9. The steam generating apparatus according to claim 8, characterized in that, The elastic component includes a spring (143) and a washer (144). One end of the spring (143) is connected to the inner top wall of the pressure relief valve seat (140), and the other end of the spring (143) is connected to the washer (144). The washer (144) is used to block the first through hole (150) and to compress the spring (143) under pressure.

10. The steam generating apparatus according to claim 1, characterized in that, The main body (100) of the device is provided with a plurality of diversion holes (160), all of which are connected to the water inlet pipe (110) and the plurality of diversion holes (160) face different areas of the substrate (210).

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