A heating tube

Abstract

This utility model discloses a heating element, including a heating flow guiding mechanism and a safety control mechanism. The heating flow guiding mechanism includes a tubular outer shell and a heating element inside, forming a spiral water channel between them. The outer shell has an inlet and an outlet at both ends, connecting to the water channel. Its core feature is the integrated safety control mechanism: NTC temperature sensors are installed at both the inlet and outlet to monitor water temperature; a fuse is connected in series in the heating element's power supply circuit for overcurrent and short-circuit protection; the outer shell also has a fixed temperature controller to directly disconnect abnormally high-temperature circuits; specifically, a water-cooled thyristor is installed at one end of the inlet, its power terminal connected in series with the heating element to adjust power, and its heat dissipation part is thermally connected to the inlet, utilizing the incoming water flow for efficient cooling. This utility model deeply integrates power control, efficient water cooling, and multiple electrical safety protections into the tube body, achieving a compact, highly reliable, and safe integrated design.

Description

Technical Field

[0001] This utility model relates to the field of liquid heating technology, and in particular to a heating element. Background Technology

[0002] In the field of liquid heating technology, heating elements with a spiral water channel design are widely used due to their long water channels and high heat exchange efficiency. However, existing heating elements of this type typically use power control components (such as silicon controlled rectifiers) as external, independent parts. This not only occupies extra space and increases assembly complexity, but also suffers from limited efficiency due to its reliance on air cooling, making it difficult to meet the heat dissipation requirements of high power or long-term continuous operation, thus affecting the overall reliability and compactness of the system. Furthermore, the safety protection measures of the heating element itself are often singular or scattered, lacking an integrated design that deeply integrates overcurrent and short-circuit protection, accurate temperature monitoring, anti-dry-burning mechanical protection, and power stabilization regulation into the tube body. This results in insufficient protection response speed and coordination under complex operating conditions, posing certain safety hazards. In addition, the installation and fixing methods of external protection components are relatively simple, making them prone to loosening over long-term use. Therefore, developing a heating element that integrates power control, efficient heat dissipation, and multiple safety protections in a robust structure has significant practical value. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a heating tube that can deeply integrate power control, efficient heat dissipation and multiple electrical safety protections into the tube body itself, achieving a more compact and reliable integrated design.

[0004] The technical solution adopted by this utility model to solve its technical problem is: A heating element, including The heating and diversion mechanism includes a tubular outer shell, a heating element disposed inside the tubular outer shell, and a spiral water channel formed between the heating element and the inner wall of the tubular outer shell. The two ends of the tubular outer shell are respectively provided with an inlet port and an outlet port communicating with the spiral water channel. Safety control mechanisms include: NTC temperature sensors are respectively installed at the water inlet and the water outlet for real-time monitoring of the water inlet and water outlet temperatures. A fuse, connected in series with the power supply circuit of the heating element, is used to cut off the power supply when the circuit is overcurrent or short-circuited. A fixed temperature controller is installed in the tubular housing and makes thermal contact with the inner wall of the tubular housing, and is used to directly disconnect the circuit when the temperature rises abnormally. A water-cooled thyristor is installed at one end of the water inlet interface and includes a power terminal and a heat dissipation unit. The power terminal is connected in series with the heating element to adjust the heating power, and the heat dissipation unit is thermally connected to the water inlet interface to be cooled by the incoming water flow.

[0005] A heating element according to an embodiment of this utility model has at least the following beneficial effects: This solution directly integrates a water-cooled thyristor into the water inlet, utilizing water flow for efficient heat dissipation, thus solving the problems of large size and poor heat dissipation of traditional air-cooled power components. Simultaneously, it integrates NTC dual-temperature monitoring, fuse overcurrent protection, and a fixed thermostat to prevent dry burning, forming a multi-layered active and passive safety protection system from precise temperature control to short circuits, overloads, and abnormal temperature rises. All electrical and control components are highly integrated with the heating element body, resulting in a compact structure, reducing external wiring and independent heat dissipation requirements, and significantly improving the overall reliability, safety, and service life of the product.

[0006] According to some embodiments of the present invention, one end of the tubular outer shell is provided with an opening, the opening is provided with an insulating and sealing end cap, the insulating and sealing end cap is provided with an electrical wire hole, the electrical wire hole respectively accommodates a neutral wire and a live wire connected to the heating element.

[0007] The advantages are: this structure enables convenient sealing and insulation of the electrical connection of the heating element, ensures reliable isolation between the water circuit and the circuit, simplifies the assembly process, and facilitates the centralized arrangement and protection of internal components.

[0008] According to some embodiments of this utility model, the fuse is provided in two parts, which are respectively connected to the neutral wire and the live wire.

[0009] The advantage is that by installing fuses in both the live and neutral wire circuits, bidirectional overcurrent and short-circuit protection is achieved. Regardless of which polarity the fault occurs on, the power supply can be quickly cut off, greatly improving electrical safety.

[0010] According to some embodiments of the present invention, the tubular outer shell is provided with an annular fixing bracket for fixing the fuse to the outer periphery of the tubular outer shell.

[0011] The benefits are: the ring-shaped mounting bracket provides a stable and reliable mounting position for the fuse, preventing it from loosening due to vibration during transportation or use, ensuring the long-term stability of the electrical connection, and making external wiring more organized.

[0012] According to some embodiments of this utility model, a ground wire is also connected to the tubular outer shell.

[0013] The advantage is that the grounding wire provides a basic leakage protection path for this heating element, which can conduct possible leakage current to the ground, effectively preventing electric shock accidents and is an important measure to ensure the personal safety of users.

[0014] According to some embodiments of the present invention, the tubular outer shell is provided with studs, and the ground wire is fixed to the studs by bolts.

[0015] The advantages are: fixing the ground wire by means of studs and bolts is a mechanical connection that is firm and reliable, has good conductivity, strong vibration resistance, and is easy to install and maintain, thus ensuring the long-term effectiveness of grounding protection.

[0016] According to some embodiments of the present invention, the heat dissipation part includes heat dissipation teeth and a heat-conducting sleeve, and the heat-conducting sleeve is fitted onto the water inlet.

[0017] The benefits are that the heat dissipation fins increase the heat exchange area with air or water, while the heat-conducting sleeve ensures efficient heat transfer from the thyristor chip to the water inlet, together optimizing the heat dissipation path and significantly improving the water cooling efficiency.

[0018] According to some embodiments of the present invention, the tubular outer shell is provided with fixing lugs near the water inlet and the water outlet, and the fixing lugs are provided with mounting holes.

[0019] The advantage is that by setting fixing lugs at key positions at both ends, a stable and balanced mechanical mounting point is provided for the heating element, making it easy to securely install it in external equipment and effectively resist water pressure impact and vibration during operation.

[0020] According to some embodiments of the present invention, the spiral water channel is formed by a spiral groove disposed on the outer surface of the heating body and the inner wall of the tubular outer shell.

[0021] The advantages are: this structure forms water channels directly on the heating element, resulting in high process integration, close and uniform contact between the water channels and the heat source, high heat transfer efficiency, and a reduction in the number of internal parts, making the structure simpler and more reliable.

[0022] According to some embodiments of the present invention, the spiral waterway is formed by a spiral body sleeved on the outside of the heating element and the inner wall of the tubular outer shell.

[0023] The advantages are: the use of independent spiral components makes it easy to design and replace them flexibly according to different flow rates and heating requirements, which improves the modularity and adaptability of product design and is conducive to the development of serialized products.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of an embodiment of the present utility model; Figure 2 for Figure 1 A front view of the tubular outer shell; Figure 3 for Figure 1 A schematic cross-sectional view of the tubular outer shell; Figure 4 for Figure 1 Schematic diagram of a water-cooled thyristor; Figure 5 for Figure 1 A schematic diagram of the fixed ear piece; Figure 6 This is a schematic diagram of the heating element in another embodiment of the present invention.

[0027] Reference numerals: tubular outer shell 100, heating element 110, spiral water channel 120, water inlet 130, water outlet 140, NTC temperature sensor 150, fuse 160, water-cooled thyristor 170, power terminal 180, heat sink 190, insulating sealing end cap 200, neutral wire 210, live wire 220, ring-shaped fixing bracket 230, stud 240, bolt 250, heat dissipation teeth 260, heat-conducting sleeve 270, fixing lug 280, mounting hole 290, spiral groove 300, spiral body 310, ground wire 320, fixed thermostat 330. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" and "second" are mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation, connection, and linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] The following is for reference. Figures 1-6 A heating element is described in detail with reference to a specific embodiment. It is to be understood that the following description is merely illustrative and not intended to limit the scope of the invention.

[0033] like Figures 1-3 As shown, a heating element has a core of a slender metal tubular shell 100. Inside this shell, a heating element 110, which can be a thick-film or thin-film heating element, is arranged axially along its axis. A spiral flow channel, namely a spiral water channel 120, is carefully constructed between the outer surface of the heating element 110 and the inner wall of the tubular shell 100. A water inlet 130 and a water outlet 140 are respectively formed at the left and right ends of the tubular shell 100. Both of these interfaces are directly connected to the spiral water channel 120, forming the core path for water heating.

[0034] To achieve efficient power regulation and solve the heat dissipation problem, a water-cooled SCR 170 is innovatively integrated into one end of the water inlet 130. For example... Figure 4 As shown, the thyristor has a power terminal 180 for connecting the main circuit. This terminal is connected in series with the internal heating element 110, thereby enabling precise adjustment of the electrical power input to the heating element 110. Its key heat dissipation part 190 forms a tight thermal conduction connection with the water inlet 130 through a thermally conductive material, so that the heat generated by the thyristor during operation can be directly carried away by the low-temperature water flowing continuously through the water inlet, achieving efficient and compact integrated water cooling.

[0035] In terms of safety monitoring, this heating element is equipped with multiple protection mechanisms. High-sensitivity NTC temperature sensors 150 are installed at the inlet 130 and outlet 140 respectively, for real-time and accurate monitoring of the incoming cold water temperature and the outgoing hot water temperature, providing crucial data for intelligent temperature control. A fuse 160 is connected in series in the power supply circuit of the heating element 110. In the event of an unexpected overload or short circuit, the fuse 160 will quickly melt, cutting off the power supply and preventing the accident from escalating. Furthermore, a fixed thermostat 330 is installed in the tubular outer casing 100, with its sensing surface in close thermal contact with the inner wall of the tubular outer casing 100. This thermostat acts as an independent mechanical protection barrier; when the temperature at the monitoring point abnormally rises to a dangerous threshold, it will directly disconnect the circuit, effectively preventing dry-burning accidents.

[0036] Regarding electrical connections and external structure, one end of the tubular housing 100 has an opening, which is sealed by an insulating end cap 200. This end cap has wiring holes through which the neutral wire 210 and live wire 220 of the heating element 110 are led out. Notably, a fuse 160 is connected in series with each of the neutral and live wires 210, providing comprehensive bidirectional protection for the circuit. These two fuses 160 are securely held in place by an annular mounting bracket 230 fixed around the outer periphery of the tubular housing 100, ensuring stable installation. Simultaneously, to ensure basic personal safety, a ground wire 320 is also connected to the outside of the tubular housing 100. Specifically, a stud 240 can be welded to the housing, and the ground wire 320 is fastened to the stud 240 with a bolt 250, achieving a reliable connection. To facilitate the installation and fixing of the entire pipe, a fixing lug 280 with mounting holes 290 is integrally formed on the tubular outer shell 100 near the inlet and outlet. Figure 5 As shown.

[0037] There are two main implementation methods for forming the spiral channel 120. The first method is to use a separate guide component (spiral body 310) with a spiral structure, such as... Figure 2 As shown, it is fitted over the heating element 110 and then inserted into the outer casing, whereby the outer spiral 310 and the inner wall of the outer casing cooperate to form a spiral channel 120. The second method involves directly machining or forming a spiral groove on the outer surface of the heating element 110, such as... Figure 6 As shown, when the heating element 110 is installed into the outer shell, the spiral groove 300 naturally encloses the inner wall of the outer shell to form a closed spiral water flow channel.

[0038] When the device is started, cold water supplied by an external water source first enters the heating element through the inlet port 130. At the inlet, the water flows through the area in close thermal connection with the heat dissipation section 190 of the water-cooled SCR 170, utilizing the low temperature of the water to efficiently cool the SCR element that generates heat during operation, ensuring a stable operating temperature for the power control components. Subsequently, the water flows into a spiral channel defined by the outer surface of the heating element 110 and the inner wall of the tubular outer casing 100. Within this spiral channel, the water is forced to extend its flow path along a predetermined spiral, thereby achieving sufficient and uniform heat exchange with the electrically powered heating element 110. The heat generated by the heating element 110 is continuously transferred to the water flow through heat conduction and convection, causing its temperature to gradually increase. The hot water, having completed the heating process, finally flows out from the outlet port 140 located at the other end of the casing, supplying the user. Throughout the heating cycle, NTC temperature sensors 150, located at the inlet and outlet, continuously monitor the inlet and outlet water temperatures, providing real-time temperature feedback to the external control system for precise power regulation. Simultaneously, a fuse 160 connected in series in the circuit monitors the current status throughout the process, while the built-in fixed thermostat 330 directly monitors the temperature of the heating element 110 or the pipe wall, together forming a rapid-response, multi-layered safety protection network.

[0039] In summary, the heating element of this utility model brings significant benefits in many aspects through its innovative modular integrated design. Firstly, it directly integrates the core power regulation element—a water-cooled thyristor 170—within the system and couples it to the water inlet, utilizing the working medium itself for heat dissipation. This fundamentally solves the long-standing problems of low heat dissipation efficiency, large space occupation, and system complexity associated with traditional external air-cooled thyristors, achieving an extremely compact design. Secondly, by integrating dual NTC temperature monitoring, dual fuse 160 overcurrent and short-circuit protection, and an independent mechanical anti-dry-burning thermostat, a comprehensive, multi-layered safety system is constructed, encompassing monitoring, regulation, and power-off protection, greatly improving the product's reliability and safety under various abnormal operating conditions. Furthermore, the structural design of the ring-shaped fixing bracket 230, integrated fixing lugs 280, and reliable grounding connection ensures the mechanical stability of all electrical components and the entire tube body during long-term operation. Finally, this integrated design significantly reduces the need for external wiring and 190 independent heat dissipation units, simplifies the overall assembly process, improves production efficiency and product consistency, and reduces the overall system cost. This gives the product a significant competitive advantage in terms of reliability, safety, and economy, meeting the market's urgent demand for high-performance, high-safety-standard heating components.

[0040] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A heating element, characterized in that, include: The heating and diversion mechanism includes a tubular outer shell (100), a heating element (110) disposed inside the tubular outer shell (100), and a spiral water channel (120) formed between the heating element (110) and the inner wall of the tubular outer shell (100). The two ends of the tubular outer shell (100) are respectively provided with an inlet port (130) and an outlet port (140) communicating with the spiral water channel (120). Safety control mechanisms include: NTC temperature sensors (150) are respectively installed at the water inlet (130) and the water outlet (140) for real-time monitoring of the water inlet and water outlet temperatures; A fuse (160) is connected in series with the power supply circuit of the heating element (110) to cut off the power supply in case of overcurrent or short circuit. A fixed temperature controller (330) is disposed in the tubular housing (100) and in thermal contact with the inner wall of the tubular housing (100), and is used to directly disconnect the circuit when the temperature rises abnormally; A water-cooled thyristor (170) is installed at one end of the water inlet (130) and includes a power terminal (180) and a heat sink (190). The power terminal (180) is connected in series with the heating element (110) to adjust the heating power, and the heat sink (190) is thermally connected to the water inlet (130) to be cooled by the incoming water flow.

2. A heating element according to claim 1, characterized in that, The tubular outer shell (100) has an opening at one end, and the opening is provided with an insulating sealing end cap (200). The insulating sealing end cap (200) is provided with wire holes, and the wire holes respectively accommodate a neutral wire (210) and a live wire (220) connected to the heating element (110).

3. A heating element according to claim 2, characterized in that, Two fuses (160) are provided, which are respectively connected to the neutral wire (210) and the live wire (220).

4. A heating element according to claim 3, characterized in that, The tubular housing (100) is provided with an annular fixing bracket (230) for fixing the fuse (160) to the outer periphery of the tubular housing (100).

5. A heating element according to claim 3, characterized in that, A ground wire (320) is also connected to the tubular outer shell (100).

6. A heating element according to claim 5, characterized in that, The tubular outer shell (100) is provided with studs (240), and the ground wire (320) is fixed to the studs (240) by bolts (250).

7. A heating element according to claim 1, characterized in that, The heat dissipation part (190) includes heat dissipation teeth (260) and heat-conducting sleeve (270), and the heat-conducting sleeve (270) is fitted onto the water inlet (130).

8. A heating element according to claim 1, characterized in that, The tubular outer shell (100) is provided with fixing lugs (280) near the water inlet and near the water outlet (140), and the fixing lugs (280) are provided with mounting holes (290).

9. A heating element according to claim 1, characterized in that, The spiral channel (120) is formed by a spiral groove (300) disposed on the outer surface of the heating element (110) and the inner wall of the tubular outer shell (100).

10. A heating element according to claim 1, characterized in that, The spiral channel (120) is formed by a spiral (310) sleeved on the outside of the heating element (110) and the inner wall of the tubular outer shell (100).

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