Steam generators and electrical equipment

Abstract

This application provides a steam generator and electrical equipment. The steam generator includes: a first housing having a steam chamber with a liquid inlet and a first steam outlet; a second housing fitted onto the first housing, defining a first annular cavity between the second housing and the first housing; and a heating element located in the first annular cavity, with the heating element in thermally conductive contact with the first housing. The steam generator of this application has a relatively compact structure and high thermal efficiency.

Description

Technical Field

[0001] This application relates to the field of steam generating equipment technology, and more particularly to a steam generator and electrical equipment. Background Technology

[0002] A steam generator is a device that heats water and converts it into steam. With the development of technology, higher requirements have been placed on the compactness, thermal efficiency, and steam output of steam generators.

[0003] Existing steam generators mainly consist of an outer tube, an insulating tube, a heating wire, and an inner tube. The inner tube, insulating tube, and outer tube are arranged sequentially from the inside out. The heating wire is positioned between the insulating tube and the outer tube to transfer heat to the liquid in the inner tube through the insulating tube. However, this type of steam generator has a low thermal efficiency. Utility Model Content

[0004] Based on this, this application provides a steam generator and electrical equipment, wherein the steam generator has a relatively compact structure and a high thermal utilization rate.

[0005] In a first aspect, this application provides a steam generator, comprising:

[0006] A first housing, the first housing having a steam chamber having a liquid inlet and a first steam outlet;

[0007] A second housing is fitted onto a first housing, and a first annular cavity is defined between the second housing and the first housing.

[0008] The heating element is located in the first annular cavity and is in thermally conductive contact with the first housing.

[0009] The steam generator of this embodiment uses a steam chamber to create a high-temperature, high-pressure environment, allowing liquid water to vaporize into steam within the chamber, or to rapidly heat cold water into hot water. An inlet allows liquid water to enter the steam chamber, and a first outlet allows steam to exit. A heating element converts electrical energy into heat to heat the liquid water. Because the first and second shells are inner and outer sleeves, a first annular cavity is defined between them, and the heating element is located within this annular cavity. This design allows for a more compact steam generator structure, reducing its volume. Furthermore, it allows the heating element to be positioned closer to the steam chamber, shortening the heat transfer path, reducing thermal resistance, and improving heat utilization. Therefore, the steam generator provided in this embodiment has a compact structure and high heat utilization.

[0010] In one possible implementation, the steam generator further includes a third housing, wherein the first housing, the second housing, and the third housing are arranged sequentially from the inside to the outside, and a second annular cavity is defined between the second housing and the third housing.

[0011] Thus, the second annular cavity can act as a heat insulation layer, thereby reducing heat transfer to the steam generator and improving the thermal efficiency of the steam generator. Alternatively, the second annular cavity can provide steam flow, allowing the steam to circulate fully within the steam generator, thereby improving the vaporization effect of the steam generator.

[0012] In one possible implementation, the first steam outlet is connected to the second annular cavity, and the second annular cavity has a second steam outlet.

[0013] In this way, liquid water can enter the steam chamber from the inlet and partially or completely vaporize into steam in the steam chamber. Then, the steam can enter the second annular chamber through the first outlet to continue circulating, allowing the steam to fully vaporize and thus improving the vaporization effect of the steam generator.

[0014] In one possible implementation, the volume V1 of the first shell and the volume V2 of the second shell satisfy: 0.25≤V1 / V2≤0.5.

[0015] In this way, the volume of the steam chamber and the volume of the first annular chamber can be guaranteed, thereby ensuring the steam output of the steam generator and the installation of the heating element.

[0016] In one possible implementation, the volume V3 of the third shell and the volume V2 of the second shell satisfy: 0.5≤V2 / V3≤1.

[0017] Thus, the third shell can form an insulation layer outside the second shell, thereby preventing heat loss and improving the thermal efficiency of the steam generator. Furthermore, the volume ratio V2 / V3 of the second shell to the third shell is between 0.5 and 1 to reduce the ineffective volume of the steam generator and ensure that the third shell can be smoothly fitted onto the second shell.

[0018] In one possible implementation, the heating element is filamentous and spirally arranged along the length of the first housing. One of the outer wall of the first housing and the inner wall of the second housing is provided with a mounting groove, and the heating element is disposed in the mounting groove.

[0019] In this way, the heating element fully heats all parts of the steam chamber, resulting in a more uniform temperature within the steam chamber. Furthermore, when the heating element is wrapped around the outer wall of the first housing, it allows for direct contact with the first housing, thereby improving the heat transfer efficiency of the heating element. The heating element can also be fixed within the mounting groove, preventing displacement and thus preventing breakage due to thermal stress.

[0020] In one possible implementation, at least one of the first annular cavity and the second annular cavity is filled with an insulating medium.

[0021] Thus, by filling the first annular cavity with an insulating medium, the steam in the steam chamber can be prevented from becoming electrified, and by filling the second annular cavity with an insulating medium, the third shell can be prevented from becoming electrified, thereby improving the safety of the steam generator.

[0022] In one possible implementation, the insulating medium includes magnesium oxide powder or boron nitride powder.

[0023] Thus, when magnesium oxide powder or boron nitride powder is placed in the first annular cavity, the heat of the heating element can be efficiently conducted to the first housing through the magnesium oxide powder, thereby improving the heat utilization rate of the heating element. In addition, the magnesium oxide powder can effectively prevent the circuit between the heating element and the first housing, thereby improving the safety of the steam generator.

[0024] In one possible implementation, the steam chamber is provided with a flow channel that is spirally arranged along the length of the first shell.

[0025] This extends the flow path of steam within the steam chamber, allowing the steam to circulate fully and thus improving the vaporization effect of the steam chamber.

[0026] In one possible implementation, the heating element includes a heating element body and an insulating and thermally conductive layer, the insulating and thermally conductive layer covering the surface of the heating element body.

[0027] In this way, the heating element itself has good insulation and thermal conductivity, and can be wrapped around the outer wall of the first shell, thereby bringing the heating element closer to the steam chamber and improving the heat transfer efficiency of the heating element.

[0028] In one possible implementation, the steam generator further includes an insulating plug, with at least one end of the first annular cavity having an opening, the insulating plug being located at the opening, and both being connected to the first housing and the second housing.

[0029] Thus, by installing an insulating sealing element at the opening to seal it, the first annular cavity is made into a closed space, thereby preventing the leakage of the insulating medium.

[0030] In a second aspect, this application provides an electrical device, including: the steam generator provided in the first aspect above, the steam generator being used to provide steam or hot water.

[0031] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the steam generator and electrical equipment provided by this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of a steam generator provided in an embodiment of this application;

[0034] Figure 2 for Figure 1 Internal structure diagram;

[0035] Figure 3 This is another structural schematic diagram of the steam generator provided in the embodiments of this application;

[0036] Figure 4 for Figure 3 The main view.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100 - First shell; 110 - Steam chamber; 111 - Liquid inlet; 112 - First steam outlet;

[0039] 200 - Second housing;

[0040] 300 - First annular cavity; 310 - Opening;

[0041] 400 - Heating element;

[0042] 500 - Third housing;

[0043] 600 - Second annular cavity; 610 - Second steam outlet;

[0044] 700 - Insulating medium;

[0045] 800 - Sealing component. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0047] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0048] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the accompanying drawings, and 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.

[0049] The terms "first," "second," and "third" (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein.

[0050] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or display that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or display.

[0051] Existing steam generators mainly consist of an outer tube, an insulating tube, a heating wire, and an inner tube. The inner tube, insulating tube, and outer tube are arranged sequentially from the inside out. The heating wire is positioned between the insulating tube and the outer tube to transfer heat to the liquid in the inner tube through the insulating tube. However, because the heat from the heating wire needs to be transferred to the liquid through the insulating tube and the inner tube, the heat transfer path is too long, resulting in significant heat loss and thus low heat transfer efficiency of the steam generator.

[0052] In view of the above problems, this application provides a steam generator and an electrical device. In the steam generator, the heating element is arranged adjacent to the first housing. The heat of the heating element can be transferred to the steam chamber through the first housing, thereby shortening the heat transfer path and improving the heat transfer efficiency of the steam generator. Furthermore, the first housing and the second housing are arranged from the inside to the outside, which makes the structure of the steam generator more compact and reduces the volume of the steam generator.

[0053] The specific implementation methods of the steam generator and electrical equipment provided in this application will be described in detail below with reference to the accompanying drawings.

[0054] Reference Figures 1 to 4 As shown, the steam generator provided in this embodiment includes a first housing 100, a second housing 200, and a heating element 400. The first housing 100 has a steam chamber 110, which has a liquid inlet 111 and a first steam outlet 112. The second housing 200 is sleeved on the first housing 100, and a first annular cavity 300 is defined between the second housing 200 and the first housing 100. The heating element 400 is located in the first annular cavity 300, and the heating element 400 is in thermally conductive contact with the first housing 100.

[0055] The steam generator of this application embodiment can heat liquid water into high-temperature steam, which can then be used to iron fabrics, clean floors or household surfaces, etc. The steam generator of this application embodiment can also rapidly heat cold water into hot water, providing hot water for users to make drinks, wash clothes, etc.

[0056] In this embodiment, the first housing 100 and the second housing 200 are fitted inside and outside each other, which makes the structure of the steam generator more compact and reduces its volume. The first housing 100 defines a steam chamber 110. Liquid water can enter the steam chamber 110 through the inlet 111, so that the liquid water vaporizes into steam under high temperature in the steam chamber 110. The steam flows out of the steam chamber 110 through the first outlet 112. A first annular cavity 300 can be defined between the first housing 100 and the second housing 200. The first annular cavity 300 is used to install the heating element 400. When the heating element 400 is energized, it can convert electrical energy into heat energy and transfer the heat to the first housing 100, thereby creating a high temperature and high pressure environment in the steam chamber 110, so that the liquid water vaporizes into steam in the steam chamber 110, or the cold water is heated into hot water.

[0057] Since the heating element 400 is disposed in the first annular cavity 300 and is in thermally conductive contact with the first housing 100, the heat of the heating element 400 can be transferred to the first housing 100, and the first housing 100 can then transfer liquid water. Compared with the prior art, the heating element 400 is closer to the steam cavity 110, the heat transfer path is shortened, and the thermal resistance is lower during the heat transfer process, thereby reducing heat loss during the transfer process and improving heat utilization.

[0058] It should be noted that the thermally conductive contact between the heating element 400 and the first housing 100 described in this embodiment can be as follows: the heating element 400 can be in direct contact with the first housing 100. For example, the heating element 400 can be a heating wire wound around the outer wall of the first housing 100, or the heating element 400 can be a heating film wrapped around the outer wall of the first housing 100. Alternatively, the heating element 400 can be indirectly in contact with the first housing 100 through air. This embodiment is not limited in this application.

[0059] The steam generator of this embodiment includes a first housing 100, a second housing 200, a heating element 400, and a first annular cavity 300. The first housing 100 includes a steam cavity 110, which includes a liquid inlet 111 and a first steam outlet 112. The steam cavity 110 is configured to create a high-temperature and high-pressure environment, so that liquid water is vaporized into steam within the steam cavity 110, or cold water is heated into hot water within the steam cavity 110. The liquid inlet 111 allows liquid water to enter the steam cavity 110, and the first steam outlet 112 allows steam to flow out of the steam cavity 110. The heating element 400 is configured to convert electrical energy into heat to heat the liquid water. Because the first housing 100 and the second housing 200 are fitted inside and out, a first annular cavity 300 is defined between the first housing 100 and the second housing 200, and the heating element 400 is disposed in the first annular cavity 300. On the one hand, this makes the structure of the steam generator more compact, thereby reducing the volume and weight of the steam generator. On the other hand, it allows the heating element 400 to be closer to the steam cavity 110, thereby shortening the heat transfer path, reducing thermal resistance, and improving heat utilization. Therefore, the steam generator provided in this embodiment has a more compact structure and a higher heat utilization rate.

[0060] Understandably, when a steam generator is used to produce hot water, the water is constantly flowing from the inlet to the outlet. As the water flows, it is washed away by the next flow of water the moment it forms scale, making it difficult for scale to form and thus extending the service life of the steam generator.

[0061] In some embodiments, the volume V1 of the first housing 100 and the volume V2 of the second housing 200 satisfy: 0.25≤V1 / V2≤0.5.

[0062] It should be noted that the first shell 100 and the second shell 200 can be tubular structures, and the cross-sections of the first shell 100 and the second shell 200 can be circular, square or polygonal. For ease of understanding, the following example uses the first shell 100 and the second shell 200 as circular tubes.

[0063] For example, the inner diameter r of the first housing 100 i Located at 6-25 mm, the outer diameter r of the first shell is 100 mm. o Located at 6-26mm, the second shell has a radius of 200 R. i The inner diameter is 17-25 mm, and the outer diameter R of the second shell is 200 mm. o The diameter is between 18-26 mm. Because the second shell 200 is fitted onto the first shell 100, the inner diameter of the second shell 200 must be larger than the outer diameter of the first shell 100. Assuming their lengths are essentially the same, the ratio of the volume of the first shell 100 to the volume of the second shell 200 is V1 / V2 = (R...).o 2 -R i 2 ) / (r o 2 -r i 2 The wall thickness of the first shell 100 and the second shell 200 can both be set to 1 to 2 mm, and the length can be set to about 100 mm.

[0064] If the volume ratio V1 / V2 of the first housing 100 to the second pipe is less than 0.25, the volume of the first housing 100 will be too small, resulting in an excessively small volume of the steam chamber 110 and an excessively large volume of the second housing 200. This will lead to an insufficient effective volume and an excessively large ineffective volume in the steam generator, which is detrimental to ensuring the steam production of the steam generator. If the volume ratio V1 / V2 of the first housing 100 to the second pipe is greater than 0.5, the volume of the first housing 100 will be too large, resulting in a small volume of the second housing 200. This will lead to a small volume of the first annular cavity 300, which is detrimental to the installation of the heating element 400.

[0065] Therefore, in this embodiment of the application, the ratio V1 / V2 of the volume of the first housing 100 to the volume of the second housing 200 is between 0.25 and 0.5, so as to ensure the volume of the steam chamber 110 and the volume of the first annular cavity 300, thereby ensuring the steam production of the steam generator and the installation of the heating element 400.

[0066] When the heating element 400 is positioned between the first housing 100 and the second housing 200, the minimum power of the heating element 400 can be set to 800W. When the heating element 400 is positioned outside the second housing 200, the minimum power of the heating element 400 needs to be set to 1000W. In other words, when the first housing 100 and the second housing 200 remain the same, changing the position of the heating element 400 from outside the second housing 200 to between the first housing 100 and the second housing 200 can improve the heat transfer efficiency of the heating element 400.

[0067] It should be understood that the smaller the volume of the steam chamber 110, the less heat the steam chamber 110 requires, and the lower the power of the heating element 400. Conversely, the larger the volume of the steam chamber 110, the more heat the steam chamber 110 requires, and the higher the power of the heating element 400. In this embodiment, the power of the heating element 400 can be set between 800W and 1850W.

[0068] Reference Figure 3 , Figure 4As shown, in one possible implementation, the steam generator further includes a third housing 500. The first housing 100, the second housing 200 and the third housing 500 are arranged sequentially from the inside to the outside. The volume V3 of the third housing 500 and the volume V2 of the second housing 200 satisfy: 0.5≤V2 / V3≤1.

[0069] It is understandable that when the steam generator is equipped with a first housing 100, a second housing 200 and a third housing 500, the first housing 100 can be made of a heat-conducting material such as metal, and the second housing 200 and the third housing 500 can be made of a heat-insulating polymer material. The second housing 200 and the third housing 500 can be integrally injection molded, or the second housing 200 and the third housing 500 can be processed separately and then assembled together.

[0070] Since the third housing 500 is fitted outside the second housing 200, the third housing 500 can form an insulation layer outside the second housing 200, thereby preventing heat loss and improving the thermal utilization rate of the steam generator.

[0071] In specific implementation, the third shell 500 can also be a circular tube. The inner diameter of the third shell 500 is greater than or equal to the outer diameter of the second shell 200. When the inner diameter of the second shell 200 is between 17-25 mm and the outer diameter of the second shell 200 is between 18-26 mm, the inner diameter of the third shell 500 is greater than or equal to 18 mm. The wall thickness of the third shell 500 can be greater than or equal to the wall thickness of the second shell 200. For example, the wall thickness of the third shell 500 can be greater than 2 mm, thereby improving the heat insulation effect of the third shell 500.

[0072] On the one hand, if the volume ratio V2 / V3 of the second shell 200 to the volume of the third shell 500 is less than 0.5, the volume of the second shell 200 will be smaller and the volume of the third shell 500 will be larger, resulting in a larger gap between the second shell 200 and the third shell 500, thereby increasing the ineffective volume of the steam generator. On the other hand, since the third shell 500 is fitted outside the second shell 200, the volumes of the second shell 200 and the third shell 500 are close, and the volume ratio V2 / V3 of the second shell 200 to the volume of the third shell 500 will be less than 1.

[0073] Therefore, in this embodiment, the volume ratio V2 / V3 of the second housing 200 to the volume of the third housing 500 is between 0.5 and 1, so as to reduce the ineffective volume of the steam generator and ensure that the third housing 500 can be smoothly fitted onto the second housing 200.

[0074] Reference Figure 3 , Figure 4 As shown, in one possible implementation, a second annular cavity 600 is defined between the second housing 200 and the third housing 500.

[0075] In other words, when the inner diameter of the third shell 500 is larger than the outer diameter of the second shell 200, there is a gap between the outer wall of the second shell 200 and the inner wall of the third shell 500, thus forming a second annular cavity 600 between the two shells. This second annular cavity 600 can act as a heat insulation layer, thereby reducing heat transfer to the steam generator and improving the thermal efficiency of the steam generator. Alternatively, the second annular cavity 600 can supply steam flow, allowing the steam to circulate fully within the steam generator, thereby improving the vaporization effect of the steam generator.

[0076] Reference Figure 3 , Figure 4 As shown, in some embodiments, the first steam outlet 112 is connected to the second annular cavity 600, and the second annular cavity 600 has a second steam outlet 610.

[0077] In this way, liquid water can enter the steam chamber 110 from the inlet 111 and partially or completely vaporize into steam in the steam chamber 110. Then, the steam can enter the second annular chamber 600 through the first outlet 112 to continue circulating, so that the steam can be fully vaporized, thereby improving the vaporization effect of the steam generator.

[0078] In one possible implementation, the heating element 400 is filamentous and spirally arranged along the length of the first housing 100. One of the outer wall of the first housing 100 and the inner wall of the second housing 200 is provided with a mounting groove, and the heating element 400 is disposed in the mounting groove.

[0079] It is understandable that when the heating element 400 is a spiral resistance wire, the mounting groove is also spiral. The heating element 400 fully heats all parts of the steam chamber 110, thereby making the temperature of the steam chamber 110 more uniform. When the heating element 400 is wrapped around the outer wall of the first housing 100, the heating element 400 can directly contact the first housing 100, thereby improving the heat transfer efficiency of the heating element 400.

[0080] In practical implementation, the diameter of the resistance wire can be 0.12mm-0.55mm, and the electric power density of the resistance wire is less than or equal to 100 square centimeters / watt.

[0081] When the heating element 400 is wrapped around the first housing 100 or the second housing 200, the first housing 100 or the second housing 200 may be provided with a mounting groove to fix the heating element 400, thereby preventing the heating element 400 from shifting and thus preventing the heating element 400 from breaking due to thermal stress.

[0082] Reference Figure 2As shown, in one possible implementation, at least one of the first annular cavity 300 and the second annular cavity 600 is filled with an insulating medium 700.

[0083] For example, the first annular cavity 300 can be filled with an insulating medium 700 to prevent the steam in the steam chamber 110 from becoming electrified. Alternatively, the second annular cavity 600 can be filled with an insulating medium 700 to prevent the third housing 500 from becoming electrified, thereby improving the safety of the steam generator. Or, both the first annular cavity 300 and the second annular cavity 600 can be filled with an insulating medium 700.

[0084] To ensure insulation performance, the difference between the inner diameter of the second housing 200 and the outer diameter of the first housing 100 can be greater than or equal to 0.3 mm, so as to ensure that the first annular cavity 300 has sufficient space to fill the insulating medium 700. The difference between the inner diameter of the third housing 500 and the outer diameter of the second housing 200 can be greater than or equal to 0.3 mm, so as to ensure that the second annular cavity 600 has sufficient space to fill the insulating medium 700.

[0085] In one possible implementation, the insulating medium 700 comprises magnesium oxide powder or boron nitride powder.

[0086] Among them, magnesium oxide powder and boron nitride powder have high thermal conductivity, with magnesium oxide powder having a thermal conductivity between 30-60 W / m·K and boron nitride powder having a thermal conductivity between 20-60 W / m·K. Furthermore, both magnesium oxide powder and boron nitride powder have high insulation strength, with magnesium oxide powder having an insulation strength greater than 10 kV / mm and boron nitride powder having an insulation strength between 30-45 kV / mm. Therefore, when magnesium oxide powder or boron nitride powder is placed in the first annular cavity 300, the heat from the heating element 400 can be efficiently conducted to the first housing 100 through the magnesium oxide powder, thereby improving the thermal utilization rate of the heating element 400. Moreover, the magnesium oxide powder can effectively prevent electrical continuity between the heating element 400 and the first housing 100, thereby improving the safety of the steam generator.

[0087] In one possible implementation, the steam chamber 110 is provided with a flow channel that extends spirally along the length of the first housing 100. This extends the flow path of steam within the steam chamber 110, allowing for sufficient steam circulation and thus improving the vaporization effect of the steam chamber 110.

[0088] In some embodiments, the heating element 400 includes a heating element body and an insulating and thermally conductive layer, the insulating and thermally conductive layer covering the surface of the heating element body.

[0089] In other words, the heating element 400 itself has good insulation and thermal conductivity, so the heating element 400 can be wrapped around the outer wall of the first housing 100, thereby bringing the heating element 400 closer to the steam chamber 110 and improving the heat transfer efficiency of the heating element 400.

[0090] The insulating and thermally conductive layer can be made of magnesium oxide.

[0091] Reference Figure 3 , Figure 4 As shown, in one possible implementation, the steam generator further includes an insulating sealing element 800, at least one end of the first annular cavity 300 has an opening 310, the insulating sealing element 800 is located in the opening 310, and both are connected to the first housing 100 and the second housing 200.

[0092] For example, Figure 2 In the schematic steam generator, both ends of the first annular cavity 300 have openings 310. Figure 4 In the illustrated steam generator, one end of the first annular cavity 300 has an opening 310. Thus, by providing an insulating sealing element 800 to the opening 310 to seal the opening 310, the first annular cavity 300 forms a closed space, thereby preventing the leakage of the insulating medium 700.

[0093] Based on the above embodiments, this application also provides an electrical device, for example, an ironing device, which includes a steam generator and an ironing panel provided in the foregoing embodiments. The ironing panel has steam holes, the steam generator is connected to the steam holes, and is configured to provide high-temperature steam to the steam holes.

[0094] The structure and working principle of the steam generator have been described in detail in the foregoing embodiments and will not be repeated here. The ironing equipment may also include a water tank and a water pump. The liquid water stored in the water tank enters the steam chamber 110 under the drive of the water pump, thereby forming high-temperature steam. Since the steam generator in this embodiment is small in size and has a high heat utilization rate, it is beneficial to the miniaturization of the ironing equipment and to improve the ironing effect of the ironing equipment.

[0095] The ironing equipment can be a vacuum iron, a blow iron, or an iron with only steam function; this application does not limit this.

[0096] For example, the electrical equipment can be a cleaning device, which includes a steam generator and a device body provided in the foregoing embodiments. The device body has a steam injection port, the steam generator is connected to the steam injection port, and is configured to provide high-temperature steam to the steam injection port.

[0097] The cleaning equipment can be a floor scrubber. The main body of the equipment includes a floor brush, and a steam port is set on the floor brush. A steam generator can provide high-temperature steam to the steam port. The high-temperature steam from the steam port can be used for cleaning components such as roller brushes and disc brushes. The high-temperature steam from the steam port can also be applied directly to the ground to remove stubborn stains from the ground.

[0098] Alternatively, the cleaning equipment could be a mite-removing vacuum cleaner, and the steam generator could provide high-temperature steam through the steam holes, allowing the high-temperature steam to act on the surface of the bed or sofa, thereby helping to kill mites and bacteria.

[0099] For example, the electrical equipment can be a garment processing device, which may include a processing chamber and a steam generator, which can provide steam or hot water to the processing chamber. The garment processing device can be a washing machine, a dryer, or a washer-dryer combo.

[0100] When the garment handling equipment is used for washing, the steam generator can provide hot water to clean the clothes located in the handling chamber. When the garment handling equipment is used for drying, the steam generator can provide steam to help the clothes in the handling chamber regain their smoothness.

[0101] For example, electrical appliances can be beverage processing equipment or cooking equipment; beverage processing equipment can be a water dispenser or coffee maker, and cooking equipment can be a rice cooker. Electrical appliances can also be smart toilets.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A steam generator, characterized in that, include: A first housing (100) has a steam chamber (110) having a liquid inlet (111) and a first steam outlet (112); A second housing (200) is sleeved on the first housing (100), and a first annular cavity (300) is defined between the second housing (200) and the first housing (100); A heating element (400) is located in the first annular cavity (300) and is in thermally conductive contact with the first housing (100).

2. The steam generator according to claim 1, characterized in that, Also includes: The third housing (500) is arranged sequentially from the inside to the outside, with the first housing (100), the second housing (200) and the third housing (500) defining a second annular cavity (600).

3. The steam generator according to claim 2, characterized in that, The first steam outlet (112) is connected to the second annular cavity (600), and the second annular cavity (600) has a second steam outlet (610).

4. The steam generator according to claim 1, characterized in that, The volume V1 of the first shell (100) and the volume V2 of the second shell (200) satisfy: 0.25≤V1 / V2≤0.

5.

5. The steam generator according to claim 2, characterized in that, The volume V3 of the third shell (500) and the volume V2 of the second shell (200) satisfy the condition: 0.5≤V2 / V3≤1.

6. The steam generator according to claim 2, characterized in that, At least one of the first annular cavity (300) and the second annular cavity (600) is filled with an insulating medium (700).

7. The steam generator according to claim 6, characterized in that, The insulating medium (700) includes magnesium oxide powder or boron nitride powder.

8. The steam generator according to any one of claims 1-7, characterized in that, The heating element (400) is filamentous and is spirally arranged along the length of the first housing (100). One of the outer wall of the first housing (100) and the inner wall of the second housing (200) is provided with a mounting groove, and the heating element (400) is disposed in the mounting groove.

9. The steam generator according to any one of claims 1-7, characterized in that, The steam chamber (110) is provided with a flow channel, which is spirally arranged along the length of the first shell (100).

10. The steam generator according to any one of claims 1-7, characterized in that, The heating element (400) includes a heating element body and an insulating and heat-conducting layer, the insulating and heat-conducting layer covering the surface of the heating element body.

11. The steam generator according to any one of claims 1-7, characterized in that, It also includes an insulating plug (800), at least one end of the first annular cavity (300) having an opening (310), the insulating plug (800) being located in the opening (310), and both being connected to the first housing (100) and the second housing (200).

12. An electrical appliance, characterized in that, include: The steam generator as claimed in any one of claims 1-11, wherein the steam generator is configured to provide steam or hot water.

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