Steam generating device and heating appliance
Through the combined structure of inner and outer pipes and the design of carbon fiber heating pipes, the safety hazards and low efficiency of existing steam generators are solved, and efficient and safe steam generation is achieved, which is suitable for a variety of application scenarios.
Patent Information
- Application Number
- CN202422520310.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-10-18
AI Technical Summary
The existing high-temperature steam generators have problems such as safety hazards, high thermal energy loss, low heating efficiency, large volume, high cost and inconvenient maintenance, making it difficult to generate high-temperature steam and limited application range.
The internal and external pipe combination structure is adopted, and the internal and external pipes are heated in first and second stages respectively, combined with the carbon fiber heating pipe and insulation box design, to achieve heat cascade utilization and efficient steam generation.
It improves steam generation efficiency and safety, reduces energy consumption, saves space, enhances the stability and flexibility of the equipment, and is suitable for a variety of application scenarios.
Smart Images
Figure CN223294797U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of steam heating, and in particular to a steam generating device and a heating appliance. Background Art
[0002] In the prior art, high-temperature steam evaporators typically use cast aluminum steam generators or directly use electric heating tubes to heat water to generate steam. Although these traditional methods can achieve steam generation, they have significant shortcomings in practical applications.
[0003] First, as steam temperature increases, the surface temperature of the steam generator also rises sharply, which not only increases safety risks during use, but also may cause unnecessary thermal damage to the surrounding environment and equipment, and result in heat loss, which is not conducive to energy conservation and environmental protection. In addition, the high temperature surface may cause inconvenience to users during use and the risk of burns.
[0004] Secondly, the heating efficiency of traditional steam generators is relatively low. While the method of directly heating water with electric heating tubes is simple and direct, the overall heating efficiency is low due to heat losses during transfer and energy dissipation during steam generation. This not only increases energy consumption but also limits the application scope and effectiveness of steam generators. In particular, the melting point of aluminum is approximately 660°C, which means that the original properties of the material can be maintained within a temperature range below 200°C. However, at high temperatures, aluminum will experience a series of failure phenomena such as softening, expansion, and oxidation. Due to the temperature resistance limitations of aluminum materials, direct steam heating methods generally do not exceed 200°C, making it difficult to generate sufficiently high steam temperatures. The steam temperature in a pressure cooker generally does not exceed 130°C.
[0005] Furthermore, traditional steam generators are often large, taking up valuable space. This shortcoming is particularly prominent as small household appliances are increasingly becoming more compact and integrated. Furthermore, their complex structure and numerous components not only increase manufacturing costs but also create inconveniences in subsequent maintenance and upkeep, raising overall user costs. Summary of the Invention
[0006] In view of this, the present application provides a steam generating device and a heating appliance, which have a simple structure and a small size, can realize multi-stage steam heating, and have high steam efficiency.
[0007] In a first aspect, the present application provides a steam generating device, which includes a steam box and a steam pipe, wherein a heating space is provided in the steam box, and a heating unit is provided in the heating space, and the steam pipe includes an inner pipe and an outer pipe that are connected to each other, the inner pipe is located in the heating space and extends from the heating space to the outside of the heating space and is connected to the outer pipe, the outer pipe abuts against the outer wall of the steam box and extends in a curved trajectory in the opposite direction along the outer wall of the steam box, the steam pipe also includes an inlet pipe and an outlet pipe, the outlet pipe is connected to the inner pipe, and the inlet pipe is connected to the outer pipe.
[0008] By employing this technical solution, the heating unit heats the air within the heating space to a high temperature, which is then radiated outward through the outer wall of the steam box. The outer tube directly abuts the outer wall of the steam box, absorbing heat dissipated by the steam box for heating. This not only saves energy, but also improves heating efficiency and reduces heat radiation. During the steam generation process, water enters the outer tube from the inlet tube. The water in the outer tube is heated to steam by the heat energy from the steam box's outer wall. The steam in the outer tube then enters the inner tube, where it is reheated by the heat energy within the heating space to become superheated steam. The steam temperature further increases before being discharged through the outlet tube. The temperature difference between the inner and outer tubes enables cascaded heat utilization and efficient heat recovery, reducing energy consumption and waste heat emissions. The unique connection structure and curved trajectory design between the inner and outer tubes and the steam box, as well as the close proximity of the steam tube to the outer wall of the steam box, conserve space and improve both space and energy efficiency. This also reduces the temperature radiated outward from the product, eliminating the need for external cooling components and thus saving energy and reducing consumption. During operation, the medium temperature within the outer tube is lower than that within the inner tube. This temperature difference allows the outer tube to act as a liquid-vapor buffer transition and primary vaporization heating. The multi-stage temperature gradient and liquid-vapor gradient ensure smoother steam flow. The primary vaporization of the outer tube is then efficiently heated by the inner tube, improving the thermal efficiency of the entire system.
[0009] In some embodiments, the inner tube and the outer tube are an integrally formed structure or a split-form structure, and the fluid medium is vaporized in the outer tube and then enters the inner tube for secondary heating, and the steam temperature in the outlet tube: the steam temperature in the outer tube is 3:1~5:1.
[0010] In some embodiments, the inner tube surrounds the heating unit from the outlet tube end and spirally extends along the length direction of the steam box away from the outlet tube.
[0011] In some embodiments, the outer tube spirally extends around the outer wall of the steam box toward the outlet tube and is then connected to the inlet tube. The inlet tube and the outlet tube are located at the same end of the steam box.
[0012] By adopting this technical solution, the inner tube, starting from the end connected to the outlet pipe, is arranged around the heating unit. This dual-stage heating system, achieved by the outer and inner tubes, improves heating efficiency. This wraparound arrangement ensures the inner tube is as close to the heating unit as possible, allowing for more efficient heat absorption. It also helps reduce heat loss during transfer, improving thermal efficiency. The spiral extension design not only saves space and increases the heating volume, but also ensures that the medium within the inner tube is continuously heated during flow, ensuring uniform and stable temperature. Furthermore, the spiral shape helps reduce resistance and pressure loss during flow, improving overall system efficiency. The outer tube is positioned closely against the outer wall of the steam box and wraps around it. This steam pipe design allows the outer tube to fully utilize the heat from the steam box's outer wall for sufficient preheating and further heat exchange before entering the inner tube for secondary heating. It also allows for the convenient connection of the inlet and outlet pipes at the same end. This significantly improves heat transfer efficiency, system stability, space utilization, and flexibility.
[0013] In some embodiments, the steam box is provided with a first outlet, and one end of the inner tube away from the outlet tube passes through the heating space from the first outlet and is connected to the outer tube.
[0014] In some embodiments, the steam box is provided with a second outlet, the outlet pipe passes through the steam box from the second outlet, and the temperature of the medium discharged from the outlet pipe is not lower than 300°C.
[0015] By adopting the above technical solution, adding a first outlet and a second outlet, and adjusting the connection method between the inner tube and these outlets, it is convenient for the inner tube to pass through the steam box and connect to the outside, reducing the risk of heat leakage in the steam box and improving the safety and maintainability of the connection.
[0016] In some embodiments, a heat preservation box is further provided outside the steam box, the steam box and the outer tube are both located inside the heat preservation box, and the outer tube is located in an inner insulation cavity between the steam box and the heat preservation box.
[0017] By adopting the above technical solution, the main function of the insulation box is to reduce the heat exchange between the steam box and steam pipe and the external environment. By wrapping the steam box and outer pipe in the insulation box, heat loss can be significantly reduced, heat transfer efficiency can be improved, and temperature stability during the heating process can be ensured. The insulation box can also help reduce noise and vibration generated during the heating process and improve the smooth operation of the equipment. The design of the internal insulation cavity between the insulation box and the steam box reduces heat loss, making the heating process in the steam box more efficient, while also improving the preheating or heat exchange effect of the outer pipe. Reducing heat loss not only improves heat transfer efficiency, but also reduces energy consumption, which is more energy-saving and environmentally friendly.
[0018] In some embodiments, the thermal insulation box is provided with a third outlet and a fourth outlet, the outlet pipe passes through the thermal insulation box from the third outlet, and the inlet pipe passes through the thermal insulation box from the fourth outlet. An outer shell is also provided outside the thermal insulation box, and an external insulation cavity is formed between the outer shell and the thermal insulation box.
[0019] By adopting this technical solution, the design of the third and fourth outlets makes connecting the heating appliance to external systems or equipment more flexible and convenient. Users can adjust the position and direction of the outlet and inlet pipes as needed to adapt to different application scenarios. The external insulation cavity further reduces heat loss.
[0020] In some embodiments, the heating unit is a carbon fiber heating tube, which spirally extends along the length direction of the steam box, and both ends of the carbon fiber heating tube pass through the steam box.
[0021] By adopting the above technical solution, the carbon fiber heating tube has the characteristics of fast heating, high efficiency, long life and corrosion resistance, and is very suitable for occasions requiring high-temperature heating. The carbon fiber heating tube extends spirally along the length of the steam box. This design helps to increase the surface area of the heating tube, improve the heat radiation efficiency, and ensure that the medium in the steam box can be evenly heated. Both ends of the carbon fiber heating tube pass through the steam box. This design facilitates connection with an external power supply and control system. At the same time, it also facilitates the installation, maintenance and replacement of the heating tube. Carbon fiber material has good high-temperature resistance, oxidation resistance and corrosion resistance. Therefore, the service life of the carbon fiber heating tube is relatively long, which can reduce the frequency of replacement and maintenance costs. The fast heating and high efficiency characteristics of the carbon fiber heating tube enable the medium in the steam box to quickly reach a higher temperature, thereby improving the heating efficiency. The design of the carbon fiber heating tube extending spirally along the length of the steam box ensures that the medium in the steam box can be evenly heated, avoiding the problem of uneven steam temperature in the inner tube.
[0022] In a second aspect, the present application provides a heating appliance comprising the steam generating device described in the first aspect.
[0023] Because heating appliances integrate efficient steam generation, they have a wide range of applications. For example, in the food processing industry, they can be used for processes such as steaming, drying, and sterilization. In the medical industry, they can be used for disinfection and sterilization of medical devices. In the chemical industry, they can be used for heating chemical reactions and distillation. Furthermore, heating appliances can be used in a variety of household applications, such as cleaning and ironing.
[0024] In summary, this application has at least one of the following beneficial technical effects:
[0025] 1. The unique steam box and steam pipe combination structure of this application not only improves thermal efficiency, but also optimizes the heat transfer path, ensuring the safety and efficiency of the equipment during the heating process.
[0026] 2. By optimizing the heat transfer path and medium flow mode, it helps to reduce the temperature and pressure fluctuations inside the system and improve the stability and reliability of the system.
[0027] 3. The heating device provided in this application integrates an efficient steam generator and other necessary components to form a comprehensive device with complete functions and convenient operation. This device not only has the advantages of high efficiency and energy saving, safety and reliability, and convenient operation, but also has a wide range of application fields and market prospects. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 This is a schematic diagram of the appearance and structure of the first embodiment of the steam generating device of the present application;
[0029] Figure 2 This is a structural diagram of the first embodiment of the steam generating device of the present application from another angle;
[0030] Figure 3 1 is a schematic three-dimensional cross-sectional view of a first embodiment of the steam generating device of the present application;
[0031] Figure 4 This is a schematic diagram of the shape and position structure of the steam pipe and heating unit of the first embodiment of the steam generating device of the present application;
[0032] Figure 5 This is a schematic diagram from another angle showing the shape and position structure of the steam pipe and heating unit of the first embodiment of the steam generating device of the present application;
[0033] Figure 6 It is a schematic diagram of the structure of the steam pipe;
[0034] Figure 7 It is a structural diagram of the heating unit;
[0035] Figure 8 This is a schematic diagram of the appearance and structure of the second embodiment of the steam generating device of the present application;
[0036] Figure 9 is a schematic three-dimensional cross-sectional view of a second embodiment of the steam generating device of the present application;
[0037] Figure 10 This is a schematic structural diagram of the second embodiment of the steam generating device of the present application with the outer shell opened;
[0038] Figure 11 It is a schematic diagram of the internal structure of the second embodiment of the steam generating device of the present application.
[0039] 1. Steam box; 11. Second outlet; 12. Outer wall; 13. First outlet; 14. Heating space; 15. First heating outlet; 2. Steam pipe; 21. Outer pipe; 22. Outlet pipe; 23. Inlet pipe; 24. Inner pipe; 3. Heating unit; 31. Connecting end; 32. Heating section; 4. Outer shell; 41. Outer port; 42. Outer insulation cavity; 43. Second heating outlet; 5. Insulation box; 51. Fourth outlet; 52. Inner insulation cavity; 53. Third outlet. DETAILED DESCRIPTION
[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of the present invention generally described and illustrated in the accompanying drawings can be arranged and designed in a variety of different configurations. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.
[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.
[0042] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.
[0043] In the description of this application, it should be understood that the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. 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 direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.
[0044] The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.
[0045] Example 1
[0046] See also Figure 1-Figure 7The embodiment of the present application provides a steam generating device, comprising a steam box 1 and a steam pipe 2. The steam box 1 is provided with a heating space 14, and the heating space 14 is provided with a heating unit 3. The steam pipe 2 comprises an inner pipe 24 and an outer pipe 21 that are interconnected. The inner pipe 24 is located in the heating space 14 and extends from the heating space 14 to the outside of the heating space 14 and is connected to the outer pipe 21. The outer pipe 21 abuts against the outer wall 12 of the steam box 1 and extends in a curved trajectory in the opposite direction along the outer wall 12 of the steam box 1. The steam pipe 2 also comprises an inlet pipe 23 and an outlet pipe 22. The outlet pipe 22 is connected to the inner pipe 24, and the inlet pipe 23 is connected to the outer pipe 21. In the working state, the temperature of the medium in the outer pipe 21 is lower than the temperature of the medium in the inner pipe 24. During the steam generation process, water enters the outer pipe 21 from the inlet pipe 23, and the water in the outer pipe 21 is heated to steam by the heat energy of the outer wall 12 of the steam box 1. Next, the water vapor in outer tube 21 enters inner tube 24 and is reheated by the heat energy in heating space 14. The water vapor's temperature further increases before it is discharged through outlet pipe 22. The temperature of the medium discharged from outlet pipe 22 is no less than 300°C. The temperature difference between heating space 14, outer wall 12, and inner and outer tubes 21 achieves cascaded utilization and effective heat recovery, reducing energy consumption and waste heat emissions. This temperature difference allows outer tube 21 to serve as a liquid-vapor buffer transition and primary vaporization heating. The multi-stage temperature gradient and liquid-vapor gradient ensure smoother steam flow.
[0047] See also Figure 1 Specifically, the steam generating device includes a heating unit 3, and the heating unit 3 can be a carbon fiber heating tube, a resistance wire heating tube, etc. The carbon fiber heating tube extends spirally along the length direction of the steam box 1, and both ends of the carbon fiber heating tube pass through the steam box 1. The rotation direction of the carbon fiber heating tube is the same as or opposite to the rotation direction of the inner tube 24, which can ensure uniform heating effect and high energy utilization. The heating unit 3 adopts the advantage of the carbon fiber heating tube, and carbon fiber has high thermal efficiency and long service life. The resistance wire heating tube can also be used for heating, which is characterized by low cost but relatively short life. The material of the heating unit 3 can be a material with good thermal conductivity such as carbon fiber, alloy wire, etc. In this embodiment, the heating unit 3 adopts a carbon fiber heating tube.
[0048] See also Figure 2 and Figure 3The steam pipe 2 includes an inner pipe 24 and an outer pipe 21. The inner pipe 24 and the outer pipe 21 can be an integrally formed structure, or they can be separately formed and then connected into one by welding or other fixed connection methods. The integrally formed structure can improve the overall strength and sealing performance of the steam pipe 2, and the split-formed structure has low cost and is easy to disassemble and maintain. The inner pipe 24 surrounds the heating unit 3 from the end of the outlet pipe 22 and spirally extends along the length direction of the steam box 1 away from the outlet pipe 22, and passes through the heating space 14 from the first outlet 13 of the steam box 1 to connect with the outer pipe 21. The outer pipe 21 surrounds and tightly adheres to the outer wall 12 of the steam box 1 and spirally extends in the direction of the outlet pipe 22 and is connected to the inlet pipe 23. The rotation direction of the outer pipe 21 is the same as or opposite to that of the inner pipe 24. The inlet pipe 23 and the outlet pipe 22 are located at the same end of the steam box 1. In this embodiment, the rotation direction of the outer tube 21 is the same as that of the inner tube 24. This design simplifies the process, and the temperature of the heating space 14 and the inner tube 24 can be directly radiated to the outer wall 12 to which the outer tube 21 is attached. This fully utilizes the heat of the outer wall 12 of the steam box 1 for sufficient preheating and further heat exchange. The outer tube 21 can be made of a material with good thermal conductivity, such as stainless steel or copper. The material can be selected based on the specific usage environment and cost considerations.
[0049] The outer tube 21 abuts against the outer wall 12 of the steam box 1 and extends along the outer wall 12 of the steam box 1 in a curved trajectory in the opposite direction to the extension direction of the inner tube 24. Spherical graphite or thermal insulation material is provided between the outer tube 21 and the outer wall 12 of the steam box 1 to fill the gap so that the outer tube 21 can obtain a more uniform heat distribution. The curved trajectory of the outer tube 21 can be manufactured by a bending mold to ensure good contact between the outer tube 21 and the outer wall 12 of the steam box 1. The inner wall of the outer tube 21 is provided with a threaded structure or a corrugated structure to increase the heat exchange area inside the outer tube 21 and improve the heat exchange efficiency. The inner tube 24 can also be provided with a similar inner wall structure to further enhance the heat exchange effect of water vapor. The threaded or corrugated structure of the inner wall of the outer tube 21 and the inner wall of the inner tube 24 can be manufactured by machining or mold forming to ensure the stability of the structure and the heat exchange effect.
[0050] See also Figure 4-Figure 6 In this embodiment, the outer tube 21 has the same rotation direction as the inner tube 24. The outer tube 21 spirals in the opposite direction of the inner tube 24, so that the outlet tube 22 and the inlet tube 23 are located at the same end. This design improves the processing of the inner and outer tubes 24, 21, and improves the yield rate. The connection between the inner and outer tubes 24, 21 is smooth and the fluid resistance is low. In addition, the inner and outer tubes 24, 21 intersect at multiple points on the axial cross section of the spatial trajectory, which facilitates the radiation of heat from the inner tube 24 and the heating space 14 to the outer wall 12 abutting the outer tube 21 at the closest distance, thereby improving the efficiency of the single-stage heating.
[0051] See also Figure 5 and Figure 7 The connecting ends 31 at both ends of the heating unit 3 extend coaxially and in opposite directions, and the intermediate heating section 32 extends in a spiral. The spiral direction of the heating section 32 can be the same as or opposite to the spiral direction of the inner tube 24. In this embodiment, the spiral direction of the heating section 32 is opposite to the spiral direction of the inner tube 24. In the spatial trajectory, the heating section 32 of the heating unit 3 and the inner tube 24 have multiple intersections on the axial cross section. The temperature at the intersection is high, which facilitates the heating section 32 to heat the surrounding air and simultaneously forms multiple heating zones of different temperatures on the inner tube 24. The temperature difference is used as the driving force for heat transfer. By heating at different temperature zones, a temperature gradient is generated within the fluid, thereby accelerating the heat transfer and the heat exchange process of the fluid.
[0052] The implementation principle of this embodiment is as follows: the steam pipe 2 is divided into two parts, the outer pipe 21 as the preheating section 32 and the buffer zone, and the inner pipe 24 as the main heating section 32, to achieve step-by-step utilization of heat. The first-level heating space 14 of the outer wall 12 of the steam box 1 can fully preheat the liquid in the outer pipe 21 to form steam, thereby reducing waste of heat sources. The inner pipe 24 is arranged in the heating space 14, so that the heat of the heating unit 3 can be more evenly transferred to the water vapor in the inner pipe 24, thereby improving energy utilization efficiency. At the same time, the temperature difference between the inner and outer pipes 21 makes the steam flow smoother, ensuring the quality of the steam. By adopting carbon fiber heating pipes and steam pipes 2 of different materials, the overall performance and reliability of the steam generating device are further enhanced. This design not only improves the energy utilization efficiency of the steam generating device, but also overcomes the shortcomings of the existing device and has high practical value.
[0053] Table 1: The relevant data of the test with different flow rates of water introduced through the inlet pipe are as follows:
[0054] The test results in Table 1 show that the steam temperature at outlet pipe 22 can reach over 400°C, significantly improving the efficiency and temperature of steam generation. Furthermore, the heat radiated outward from heating space 14 is absorbed by outer pipe 21 and then, through the insulation provided by inner and outer insulation chambers 52 and 42, significantly reduces the risk of high-temperature burns on the product.
[0055] Example 2
[0056] The difference between the steam generating device of this embodiment and the embodiment 1 is that the design of the heating unit 3 is further optimized, and the heating unit 3 of different materials and structures is adopted.
[0057] Specifically, the heating unit 3 can adopt other types of heating tubes, such as resistance wire heating tubes, silicon carbide heating tubes, etc. Resistance wire heating tubes have low cost and are suitable for the low-end market. Silicon carbide heating tubes have high high temperature resistance and are suitable for steam generating devices in high temperature environments. The heating unit 3 can be made of different materials, such as metal wire, ceramic heating tubes, etc., each material has different thermal conductivity and durability. Carbon fiber heating tubes have good thermal conductivity and a long service life, and are suitable for use in steam generating devices that are used for a long time. Resistance wire heating tubes have low cost, but a relatively short service life, and are suitable for short-term use or frequent replacement. The material of the heating unit 3 can be appropriately selected according to the specific use environment and cost considerations.
[0058] The heating unit 3 can be designed as a spiral heating tube structure, with the inner tube 24 located at the center of the spiral heating tube, ensuring that the liquid within the inner tube 24 is fully vaporized and reaches a sufficiently high temperature. The inner tube 24 can also be designed to extend around the outer circumference of the spiral heating tube, which can increase the liquid storage capacity within the inner tube 24 and improve steam generation. Both designs can be selected and applied as needed.
[0059] The implementation principle of this embodiment is: by optimizing the design of the heating unit 3 and selecting heating units 3 of different materials and structures, selection can be made according to different usage scenarios and needs, thereby improving the application range and service life of the steam generating device.
[0060] Example 3
[0061] The difference between the steam generating device of this embodiment and the above embodiments is that the design of the steam pipe 2 is further optimized, and a structure of different shape and material is adopted.
[0062] Specifically, the design of the optimized steam pipe 2 can adopt different shapes and materials. The steam pipe 2 can be made of stainless steel, copper pipe or other materials with good thermal conductivity. In addition to adopting a spiral design, various combinations such as straight pipes and U-shaped pipes can also be adopted to adapt to different application scenarios. The inner wall of the outer tube 21 is provided with a threaded structure or a corrugated structure to increase the heat exchange area in the outer tube 21 and improve the heat exchange efficiency. The inner tube 24 can also be provided with a similar inner wall structure to further enhance the heat exchange effect of water vapor. The threaded or corrugated structure of the inner wall and the inner wall of the outer tube 21 can be manufactured by machining or mold forming to ensure the stability of the structure and the heat exchange effect.
[0063] The implementation principle of this embodiment is: by optimizing the design of the steam pipe 2 and adopting different shapes and materials, it can be adjusted according to different functional requirements. This not only enhances the flexibility and applicability of the steam generating device, but also improves the heat exchange efficiency and service life of the device.
[0064] Example 4
[0065] See also Figures 8-11 The difference between the steam generating device of this embodiment and the above embodiment is that the structure of the steam box 1 is further expanded, and the insulation box 5 design is introduced to improve the insulation effect of the entire device.
[0066] Specifically, an insulation box 5 is provided outside the steam box 1. The steam box 1 and the outer tube 21 are both located inside the insulation box 5, and the outer tube 21 is located between the steam box 1 and the insulation box 5. The inner insulation cavity 52 between the insulation box 5 and the steam box 1 forms a first-level heating space 14, and the heating space 14 inside the steam box 1 is a second-level heating space 14. An outer shell 4 is provided outside the insulation box 5. The insulation box 5 is located inside the outer shell 4, and the outer shell 4 and the insulation box 5 are insulated by air or insulation material. The insulation box 5 is provided with a third outlet 53 and a fourth outlet 51. The outlet pipe 22 passes through the third outlet 53 of the insulation box 5, and the inlet pipe 23 passes through the fourth outlet 51 of the insulation box 5. The third outlet 53 and the fourth outlet 51 can be sealed. This design significantly improves the insulation effect of the entire device and reduces heat loss. The insulation box 5 is also provided with a first heating outlet 15, and the heating unit 3 extends out of the insulation box 5 from the first heating outlet 15.
[0067] The insulation box 5 can be made of a material with a low thermal conductivity coefficient, so as to ensure the insulation effect of the insulation box 5 to prevent heat loss. The gap between the outer tube 21 and the steam box 1 can be filled with heat-conducting materials, such as graphene, insulation cotton, porous ceramics, etc., to enhance the heat transfer effect. The choice of the material of the insulation box 5 can be appropriately selected according to the specific use environment and cost considerations. The insulation box 5 can adopt an integrated molding design to ensure the sealing and insulation effect of the entire device. The insulation material can be a cavity or a filler, for example, glass fiber or aluminum silicate wool can be used to further enhance the insulation effect.
[0068] An external insulation cavity 42 is formed between the outer shell 4 and the insulated box 5. This further insulates the insulated box 5 and reduces heat loss. The outer shell 4 is provided with a second heating outlet 43 and two external ports 41 located at the same end. The two external ports 41 correspond one-to-one with the outlet pipe 22 and the inlet pipe 23. The heating unit 3 extends from the second heating outlet to the outer shell 4. The outlet pipe 22 and the inlet pipe 23 extend from the outer shell 4 through the corresponding external ports 41 at one end of the outer shell 4.
[0069] The operating principle of this embodiment is as follows: by introducing the thermal insulation box 5, a multi-stage heating space 14 is achieved. The first stage heating space 14 is used for preheating and initial steam generation, while the second stage heating space 14 is used to further increase the steam temperature. The placement of the thermal insulation box 5 between the outer shell 4 further reduces heat loss and improves the overall thermal efficiency of the device. This design not only improves the energy efficiency of the steam generator, but also ensures steam quality, thus possessing high practical value.
[0070] Example 5
[0071] This embodiment discloses a heating device, including any of the steam generating devices in the above embodiments. Referring to the above figures, the working process of the heating device in this embodiment is as follows:
[0072] The heating unit 3 is powered on to heat the heating space 14, and the heat in the heating space 14 is radiated to the outer wall 12, and the temperature of the outer wall 12 increases;
[0073] Water enters the outer tube 21 from the inlet pipe 23, and the temperature of the outer wall 12 is transferred to the outer tube 21 to heat the water in the outer tube 21 into water vapor;
[0074] The water vapor enters the inner tube 24 along the outer tube 21, and the high temperature in the heating space 14 performs secondary heating on the water vapor in the inner tube 24;
[0075] The water vapor in the inner tube 24 is discharged through the outlet tube 22 and enters the cooking area of the heating device, and the high-temperature water vapor heats the cooking area.
[0076] The heating device of this embodiment has a wide range of applications. For example, in the food processing industry, such as high-temperature steamers, electric steamers and other cooking appliances, the heating device can be used for steaming and cooking. High-temperature steam is quickly generated by the two-stage vaporization of the steam generating device, and the steam is guided from the outlet pipe 22 to the food to be cooked, and the food is quickly heated to achieve the functional effects of fast cooking, freshness preservation and fishy removal. Cooking with high-temperature steam can better maintain the shape, nutrition and moisture of the raw materials, while making the dishes soft, tender, fat and glutinous, quickly absorbed by the flavor, and beautiful in appearance and color. It can also cleverly force out the fat and salt inside the ingredients, making the baked dishes lower in salt and fat, meeting the needs of modern people in pursuit of a healthy diet.
[0077] In order to improve the adaptability of the heating appliance to different ingredients in cooking scenarios, the heating appliance of this embodiment is also provided with different program control modules, through which the steam temperature and steam discharge volume can be adjusted and controlled.
[0078] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments, which are merely illustrative of the principles of the present invention. The present invention is susceptible to numerous variations, modifications, substitutions, and variations without departing from the spirit and scope of the present invention, and all such variations, modifications, substitutions, and variations fall within the scope of the claimed invention.
Claims
1. A steam generating device, characterized in that: It includes a steam box and a steam pipe, a heating space is provided in the steam box, a heating unit is provided in the heating space, the steam pipe includes an inner pipe and an outer pipe that are connected to each other, the inner pipe is located in the heating space and extends from the heating space to the outside of the heating space and is connected to the outer pipe, the outer pipe abuts against the outer wall of the steam box and extends in a curved trajectory in the opposite direction along the outer wall of the steam box, the steam pipe also includes an inlet pipe and an outlet pipe, the outlet pipe is connected to the inner pipe, and the inlet pipe is connected to the outer pipe.
2. The steam generating device according to claim 1, characterized in that: The inner tube and the outer tube are integrally formed or split-formed structures. The fluid medium is vaporized in the outer tube and then enters the inner tube for secondary heating. The steam temperature in the outlet tube is 3:1 to 5:
1.
3. The steam generating device according to claim 1 or 2, characterized in that: The inner tube surrounds the heating unit from the outlet tube end and spirally extends along the length direction of the steam box in a direction away from the outlet tube.
4. The steam generating device according to claim 1 or 2, characterized in that: The outer tube surrounds the outer wall of the steam box and spirally extends toward the outlet tube and is then connected to the inlet tube. The inlet tube and the outlet tube are located at the same end of the steam box.
5. The steam generating device according to claim 3, characterized in that: The steam box is provided with a first outlet, and one end of the inner tube away from the outlet tube passes through the heating space from the first outlet and is connected to the outer tube.
6. The steam generating device according to claim 1, characterized in that: The steam box is provided with a second outlet, and the outlet pipe passes through the steam box from the second outlet. The temperature of the medium discharged from the outlet pipe is not lower than 300°C.
7. The steam generating device according to claim 1, characterized in that: A heat preservation box is further provided outside the steam box. The steam box and the outer tube are both located inside the heat preservation box. The outer tube is located in an inner heat insulation cavity between the steam box and the heat preservation box.
8. The steam generating device according to claim 7, characterized in that: The insulation box is provided with a third outlet and a fourth outlet. The outlet pipe passes through the insulation box from the third outlet, and the inlet pipe passes through the insulation box from the fourth outlet. An outer shell is also provided outside the insulation box, and an external insulation cavity is formed between the outer shell and the insulation box.
9. The steam generating device according to claim 1, characterized in that: The heating unit is a carbon fiber heating tube, which spirally extends along the length direction of the steam box, and both ends of the carbon fiber heating tube pass through the steam box.
10. A heating device, characterized in that: The invention comprises a steam generating device according to any one of claims 1 to 9.