Heating pipe, steam generating device and dish washing machine
By designing the hot and cold zone structures of the carbon film heating tube, the problems of crystallization and sealing at high temperatures in carbon film heating tubes were solved, achieving stability and safety in high-power heating.
Patent Information
- Application Number
- CN202422839113.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-21
AI Technical Summary
Existing transparent heating element shells, such as glass tubes and quartz tubes, are prone to crystallization and whitening or softening at high temperatures. Heating elements made of carbon film heating materials are at risk of aging or burning of the conductive structure when used at high temperatures, and long-term immersion in water can easily lead to sealing problems.
Design a carbon film heating tube. The carbon film is serpentine and includes a hot zone and a cold zone. The hot zone is located in the horizontal section of the quartz tube, and the cold zone is located in the vertical section. A conductive structure is connected to the cold zone. The hot zone is immersed in water for cooling, and the cold zone is located above the water surface to avoid crystallization and sealing problems.
Stable use of carbon film heating tubes at high temperatures has been achieved, avoiding crystallization and sealing problems of quartz tubes, and ensuring the safety and reliability of the conductive structure.
Smart Images
Figure CN223503061U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of heating technology, and in particular to a heating element, a steam generator, and a dishwasher. Background Technology
[0002] Graphene films and carbon film materials with similar properties have low resistance, which allows them to generate high-power heat in small heating spaces, thus raising the temperature in a shorter time. Their heating temperature can exceed 1000℃.
[0003] Most existing transparent heating tubes have glass or quartz tubes as their outer shells. The quartz tubes, which are most commonly used on the market, should not be used at temperatures exceeding 800°C for extended periods, otherwise they will crystallize and turn white. Glass tubes are even more problematic; they are prone to softening or even melting when used at temperatures above 800°C.
[0004] How to ensure the normal use of heating elements made of carbon film heating materials is a problem that researchers should consider. Summary of the Invention
[0005] The primary objective of this application is to provide a heating element comprising:
[0006] Quartz tube, which is U-shaped and includes a horizontal section and a vertical section;
[0007] The carbon film is placed inside the quartz tube. When laid flat, the carbon film is serpentine and meandering. Inside the quartz tube, it is rolled into a tubular shape. The carbon film includes hot and cold zones connected in series.
[0008] Furthermore, the carbon film can be any one of graphene film, artificial graphite film, or graphite film.
[0009] Furthermore, the cold zones are located at both ends of the carbon film, while the hot zones are connected to the cold zones located in the middle of the carbon film.
[0010] Furthermore, the length of the carbon film cold zone is less than the length of the hot zone and / or the width of the cold zone is greater than the width of the hot zone.
[0011] Furthermore, the cold zone is connected to the conductive structure.
[0012] Furthermore, the hot zone of the carbon film is located in the horizontal section of the quartz tube, while the cold zone of the carbon film is located entirely or partially in the vertical section of the quartz tube.
[0013] Furthermore, the cross-section of the carbon film in the quartz tube is arc-shaped or circular.
[0014] A second objective of this application is to provide a steam generating apparatus, comprising:
[0015] A water storage device containing an aqueous solution;
[0016] A heating device, which includes the heating element provided in the first objective of this application;
[0017] Part of the heating element is immersed in the water storage device.
[0018] Furthermore, the hot zone of the heating element is immersed in water, while the cold zone of the heating element is partially or entirely above the water surface.
[0019] The third objective of this application is to provide a dishwasher that includes the steam generating device provided in the second objective of this application.
[0020] The beneficial effects of this application are as follows:
[0021] The carbon film is designed with a structure that includes a hot zone and a cold zone. The cold zone is located at both ends of the carbon film and is connected to a conductive structure to prevent the conductive structure from aging or burning due to long-term excessively high temperature at the conductive connection.
[0022] The hot zone of the carbon film is designed to be located in the horizontal section of the quartz tube, and the cold zone is designed to be partially or entirely located in the vertical section of the quartz tube. The horizontal section of the quartz tube is placed underwater for use, and the vertical section of the quartz tube is above the water surface to prevent the risk of water ingress failure. The horizontal section of the quartz tube and the hot zone of the carbon film are located underwater, and the cooling of the quartz tube is achieved with the help of water, preventing the risk of crystallization and whitening of the quartz tube.
[0023] This quartz tube achieves high-power heating within a very small heating space. Attached Figure Description
[0024] Figure 1 This is a structural diagram of the heating element provided in Example 1.
[0025] Figure 2 This is a planar structure diagram of the carbon film inside the heating tube in Example 1.
[0026] Figure 3 A partial view of the steam generator provided in Example 2. Detailed Implementation
[0027] The following detailed description of exemplary embodiments of this application refers to the accompanying drawings, which form part of the description, illustrating exemplary embodiments in which this application may be implemented. The more detailed description of embodiments of this application below is not intended to limit the scope of the claimed application, but is merely illustrative and does not limit the description of the features and characteristics of this application, in order to suggest the best mode for carrying out this application and sufficient to enable those skilled in the art to implement it. However, it should be understood that various modifications and variations can be made without departing from the scope of this application as defined by the appended claims. The detailed description and drawings should be considered illustrative only and not restrictive, and any such modifications and variations shall fall within the scope of this application described herein. Furthermore, the background art is intended to illustrate the current state of research and development and significance of the technology, and is not intended to limit this application or its application areas.
[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0029] It should be understood that in this application, "connection" and "connected" can both refer to a mechanical or physical connection relationship. For example, "connected to B" or "connected to B" can mean that there are fastening components (such as screws, bolts, rivets, etc.) between A and B, or that A and B are in contact with each other and are difficult to separate.
[0030] Unless otherwise specified in the examples, the procedures should be performed under standard conditions or conditions recommended by the manufacturer. Reagents or instruments whose manufacturers are not specified are all commercially available products.
[0031] The technical solutions in this application will now be described with reference to the accompanying drawings.
[0032] The primary objective of this application is to provide a heating element, wherein, in a first objective embodiment, the heating element comprises:
[0033] Quartz tube, which is U-shaped and includes a horizontal section and a vertical section;
[0034] The carbon film is placed inside the quartz tube. When laid flat, the carbon film is serpentine and meandering. Inside the quartz tube, it is rolled into a tubular shape. The carbon film includes hot and cold zones connected in series.
[0035] The resistivity of carbon film is typically several orders of magnitude lower than that of traditional metal heating wires. According to the formula for calculating heating power, P=U... 2The formula for calculating R and resistance is R = ρL / Wh (where R represents the resistance value, ρ represents the resistivity, L represents the length of the resistor, W represents the width of the resistor, and h represents the thickness of the resistor). Carbon film heating has the advantage of high-power heating compared to metal heating wires.
[0036] The carbon film is designed to have a serpentine, meandering shape when laid flat, serving two purposes: first, to give the carbon film a larger heating area; and second, to control the heating power. Defining the current direction as the length direction, according to the formula R = ρL / Wh, we can know that within a limited space, we can control the heating power by controlling the degree of meandering of the carbon film (the length and width of the carbon film).
[0037] The carbon film is rolled into a tube and placed inside the quartz heating tube, so that the carbon film occupies a larger space inside the quartz tube, and the heating of the heating tube is more uniform.
[0038] In some embodiments of the first objective, the carbon film is any one of graphene film, artificial graphite film, or graphite film. The above carbon films have high electrical conductivity, and when energized in a low-temperature environment, the carbon atoms inside can quickly conduct current and generate heat.
[0039] In a partial embodiment of the first objective, the cold zone is located at both ends of the carbon film, and the hot zone connects the cold zone to the middle of the carbon film.
[0040] In a partial embodiment of the first objective, the length of the carbon film cold zone is less than the length of the hot zone and / or the width of the cold zone is greater than the width of the hot zone, and the power of each part of the series circuit is calculated using the formula P=I. 2 The formula for calculating resistance, R = ρL / Wh, is used to regulate the heating power by controlling the resistance. If the length of the cold zone is less than the length of the hot zone and / or the width of the cold zone is greater than the width of the hot zone, the resistance of the cold zone will be less than that of the hot zone, thus resulting in a lower heating power in the cold zone compared to the hot zone. In some preferred embodiments, the length of the cold zone is less than the length of the hot zone and the width of the cold zone is greater than the width of the hot zone.
[0041] In some embodiments of the first objective, a conductive structure is connected to the cold zone. The connection points of this conductive structure need to consider hotspot issues. Repeated, prolonged operation of the conductive structure at high temperatures may lead to aging or burnout. Therefore, it is necessary to minimize the heat generation at the connection points of the conductive structure. Thus, connecting the conductive structure to the cold zone avoids the risk of aging. Typically, but not limitingly, this conductive structure is a molybdenum terminal.
[0042] In some embodiments of the first objective, the quartz tube is U-shaped, including a horizontal section and a vertical section. The hot zone of the carbon film is located in the horizontal section of the quartz tube, and the cold zone of the carbon film is wholly or partially located in the vertical section of the quartz tube. This is based on the usage scenario of the heating tube. The heating tube provided by the first objective of this application has the characteristic of high-power heating and can be used as a heating device in a steam generator. The steam generator has the following two major risks during use: ① The heating temperature is too high, and the quartz tube is prone to crystallization and whitening when used in a high-temperature environment for a long time, resulting in a decline in product quality; ② The heating device is in direct contact with water and is used for a long time when immersed in water, which poses a great risk of sealing and water ingress can easily lead to circuit damage. The heating temperature of the hot zone of the carbon film is too high. Immersing it in water cools the quartz tube with the help of water. The temperature of the cold zone of the carbon film is lower than that of the hot zone. Placing the cold zone on the water and dry-burning it produces a lower temperature, eliminating the risk of crystallization in the quartz tube. At the same time, placing the conductive structure on the cold zone above the water avoids the risk of water ingress caused by sealing problems.
[0043] In some embodiments of the first objective, the cross-section of the carbon film in the quartz tube is arc-shaped or circular.
[0044] A second objective of this application is to provide a steam generating apparatus, comprising:
[0045] A water storage device containing an aqueous solution;
[0046] A heating device, which includes the heating element provided in the first objective of this application;
[0047] Part of the heating element is immersed in the water storage device.
[0048] In some embodiments of the second objective of this application, the hot zone of the heating element is immersed in water, while the cold zone of the heating element is partially or entirely above the water surface. The purpose of this design is to address the problems of crystallization and whitening of the quartz tube, as well as the risk of water ingress due to quartz tube sealing issues.
[0049] This steam generator can be used in dishwashers, steam ovens, steam ovens, steam generators, and other equipment that requires steam generation, without limiting its application scenarios.
[0050] A third objective of this application is to provide a dishwasher that includes the steam generating device provided in the second objective of this application. Example 1
[0051] like Figure 1 As shown, this embodiment provides a heating tube, including a quartz tube 1, which includes a horizontal part 11 and a vertical part 12. The carbon film 2 is a graphene film, which is disposed inside the quartz tube 1 and is rolled into a tubular shape inside the quartz tube 1. The carbon film 2 is rolled into a tubular shape inside the quartz tube, which makes the carbon film occupy a larger space inside the quartz tube and the heating of the heating tube more uniform.
[0052] In this embodiment, the cross-section of the carbon film 2 in the quartz tube 1 is arc-shaped. In other embodiments, the carbon film 2 can be rolled up to a greater extent, and its cross-section can be circular.
[0053] Carbon film 2 in a flat state, as Figure 2 As shown, the carbon film 2 is integrally cut into a serpentine shape. It includes a hot zone 21 and a cold zone 22, with the cold zone 22 located at both ends and the hot zone 21 connected to the cold zone 22 in the middle. The hot zone 21 and the cold zone 22 are connected in series. This serpentine design allows the carbon film to have a larger heating area. Furthermore, the heating power can be controlled by adjusting the degree of serpentine curvature (length and width of the carbon film), thus enabling power customization to meet customer needs.
[0054] The direction of the current is defined as the length direction of the carbon film, such as... Figure 2 As shown, the length of the cold zone 22 is less than the length of the hot zone 21, and the width of the cold zone 22 is greater than the width of the hot zone 21. Based on this arrangement, according to the power calculation formula P=I for each part of a series circuit... 2 The formula for calculating R and resistance, R = ρL / Wh, can be used to control the heating power of the cold zone to be less than that of the hot zone.
[0055] The hot zone 21 is positioned on the horizontal part 11 of the quartz tube 1, and the cold zone 22 is positioned on the vertical part 12 of the quartz tube.
[0056] The cold zone 22 is also connected to a conductive structure 3. In this embodiment, the conductive structure is a molybdenum terminal, which is also located in the vertical part 12 of the quartz tube 1.
[0057] The heating element provided in this embodiment is connected to an external circuit via a molybdenum terminal during use, enabling the carbon film to generate heat. The heating area of this heating element is 3036 mm². 2 With a heating power of 2200W, it achieves high-power heating within a very small heating space. Example 2
[0058] like Figure 3 As shown, this embodiment provides a steam generating device, including a heating element and a water storage device 4 as provided in Embodiment 1, wherein the water storage device 4 stores an aqueous solution. Part of the heating element is immersed in the water storage device.
[0059] Specifically, the horizontal portion 11 of the heating element and the hot zone 21 of the carbon film are completely submerged in water, while the vertical portion 12 of the heating element and the cold zone 22 of the carbon film are partially submerged and partially above water. The conductive structure 3 is also located above water. The hot zone of the carbon film has an excessively high heating temperature; immersing it underwater cools the quartz tube, preventing the risk of whitening and crystallization. The cold zone of the carbon film has a lower temperature than the hot zone. Even if some cold zones are placed above water for dry burning, their heating power is low and their temperature is low, eliminating the risk of crystallization in the quartz tube. Furthermore, placing the conductive structure above water in the cold zone avoids the risk of water ingress due to sealing issues.
[0060] The steam generator provided in this embodiment ensures that the minimum water level is above the horizontal part 11 of the quartz tube during use through the controller. Since the heating tube has a power of 2200W, it can achieve rapid evaporation of the aqueous solution in the water storage device after being powered on. Example 3
[0061] This embodiment provides a dishwasher, including the steam generator provided in Embodiment 2.
[0062] The dishwasher itself is a dishwasher of existing technology, and its specific structure will not be described in detail.
[0063] The above description describes specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered 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 heating element, characterized in that, The heating element includes: A quartz tube, the quartz tube being U-shaped, comprising a horizontal section and a vertical section; The carbon film disposed inside the quartz tube has a serpentine shape when laid flat, and is rolled into a tubular shape inside the quartz tube. The carbon film includes hot and cold zones connected in series.
2. The heating element according to claim 1, characterized in that, The carbon film can be any one of graphene film, artificial graphite film, or graphite film.
3. The heating element according to claim 1, characterized in that, The cold zones are located at both ends of the carbon film, and the hot zones are connected to the cold zones located in the middle of the carbon film.
4. The heating element according to claim 3, characterized in that, The length of the carbon film cold zone is less than the length of the hot zone and / or the width of the cold zone is greater than the width of the hot zone.
5. The heating element according to claim 3, characterized in that, The cold zone is connected to a conductive structure.
6. The heating element according to claim 3, characterized in that, The hot zone of the carbon film is located in the horizontal section of the quartz tube, and the cold zone of the carbon film is located wholly or partially in the vertical section of the quartz tube.
7. The heating element according to claim 1, characterized in that, The cross-section of the carbon film in the quartz tube is arc-shaped or circular.
8. A steam generating device, characterized in that, include: A water storage device, wherein an aqueous solution is placed in the water storage device; Heating device, the heating device comprising the heating tube according to any one of claims 1 to 7; The heating element is partially immersed in the water storage device.
9. The steam generating apparatus according to claim 8, characterized in that, The hot zone of the heating element is immersed in water, while the cold zone of the heating element is partially or entirely above the water surface.
10. A dishwasher, characterized in that, Includes the steam generating apparatus according to any one of claims 8 to 9.