A helical heating element
Patent Information
- Application Number
- CN202522149000.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-11
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-10-11
AI Technical Summary
[0002]电加热设备的加热管有直接加热和加热体与换热液隔离两种方式，直接加热虽然热效率高，但已结水垢，导致热效率迅速下降，不易维护；加热体与换热液隔离方式是电加热体通过铜或者铝合金的壳体对换热液进行加热，但电加热器的缺点是部分热量会散失到周围环境中，导致热效率降低和发热管使用寿命短，而且加热体与换热液隔离方式的结构复杂，不方便安装和后续维护，因此，本领域技术人员需要不断攻克热效率低的原因，以提高热效率
[0012]与现有技术相比，本实用新型的有益效果为：本产品适用于电采暖、淋浴、模温机等设备的加热。全铜的换热管路传热快，电加热管不与水接触，不结水诟且抗氧化好，水流量大；PTC半导体发热体无燥音、无衰减、寿命长，防干烧安全性能好，热效率高节能；安装方便；功率大小可根据客户需求而设计加工。
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Figure CN224801830U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heating equipment, specifically a spiral heating element. Background Technology
[0002] Electric heating devices employ two heating elements: direct heating and heating element isolation from the heat exchange fluid. While direct heating offers high thermal efficiency, scale buildup leads to a rapid decrease in efficiency and makes maintenance difficult. The heating element isolation method involves the electric heating element heating the heat exchange fluid through a copper or aluminum alloy casing. However, this method suffers from the drawback of some heat loss into the surrounding environment, resulting in reduced thermal efficiency and a shorter lifespan for the heating element. Furthermore, the structure of the heating element isolation method is complex, making installation and subsequent maintenance inconvenient. Therefore, those skilled in the art need to continuously address the causes of low thermal efficiency in order to improve overall thermal efficiency. Utility Model Content
[0003] In order to solve some problems existing in the heating element in the prior art, this utility model provides a spiral heating element.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a spiral heating body, including a heat exchange pipeline, the heat exchange pipeline being processed with a through heat exchange channel, the outer wall of the heat exchange pipeline being processed with a first spiral groove, at least one electric heating tube being installed in the first spiral groove, the electric heating tube being in contact with the inner wall of the first spiral groove; the heat exchange pipeline is covered with a shell; the shell is provided with wiring holes; The heat exchange pipeline is equipped with connectors at both ends.
[0005] Furthermore, the electric heating tube is fitted to the inner wall of the first spiral groove by die casting.
[0006] Furthermore, end caps are welded to both ends of the heat exchange pipeline, and connectors are welded to the end caps.
[0007] Furthermore, the depth of the first spiral groove is greater than the diameter of the electric heating tube.
[0008] Furthermore, a heat insulation layer is provided between the shell and the heat exchange pipeline.
[0009] Furthermore, a temperature controller is installed on the side wall of the housing.
[0010] Furthermore, the wiring hole extends outward to form a conduit.
[0011] Furthermore, the outer wall of the heat exchange pipeline is recessed downward to form a first spiral groove, and the inner wall of the heat exchange pipeline on both sides of the first spiral groove forms a second spiral groove.
[0012] Compared with existing technologies, the beneficial effects of this utility model are as follows: This product is suitable for heating equipment such as electric heating, showers, and mold temperature controllers. The all-copper heat exchange pipeline has fast heat transfer; the electric heating element does not come into contact with water, does not accumulate grime, and has good oxidation resistance; it also has a large water flow rate; the PTC semiconductor heating element is noiseless, has no attenuation, has a long lifespan, good anti-dry-burning safety performance, and high thermal efficiency and energy saving; it is easy to install; and the power can be designed and processed according to customer needs. Attached Figure Description
[0013] Figure 1 A schematic diagram of the structure of the spiral heating element provided by this utility model; Figure 2 A cross-sectional view of the spiral heating element provided by this utility model; Figure 3 A partial structural schematic diagram of the spiral heating element provided by this utility model; Figure 4 This is a schematic diagram of the heat exchange pipeline provided by this utility model; Figure 5 A schematic diagram of the structure of the electric heating tube provided by this utility model; The components include: heat exchange pipeline 1, heat exchange channel 2, first spiral groove 3, electric heating tube 4, shell 5, wiring hole 6, connector 7, end cap 8, insulation layer 9, second spiral groove 10, and thermostat 11. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0015] like Figures 1-5As shown, this embodiment provides a spiral heating element, including a heat exchange pipe 1 made of copper, which has fast heat conduction, strong oxidation resistance, and is not prone to scale buildup. Stainless steel can also be used to reduce costs. The heat exchange pipe 1 has a through heat exchange channel 2, and a first spiral groove 3 is machined on its outer wall. At least one electric heating tube 4 is installed within the first spiral groove 3. The electric heating tube 4 is bent into a spring shape according to the shape and pitch of the first spiral groove 3 and then screwed into the first spiral groove 3. When heated, the heat is absorbed by the heat exchange pipe 1 and conducted to water or other heat exchange media. The electric heating tube 4 uses a PTC semiconductor heating element. Multiple electric heating tubes 4 are connected in parallel to ensure that the electric heating tubes 4 cover as much of the first spiral groove 3 as possible. The electric heating tubes 4 are in close contact with the inner wall of the first spiral groove 3 to ensure heat exchange effect. A shell 5 is fitted over the heat exchange pipe 1. The shell 5 has a wiring hole 6, which extends outward to form a conduit for connecting a power cord. The heat exchange pipeline 1 is equipped with connectors 7 at both ends, which are used to connect the inlet water pipeline and the outlet water pipeline respectively.
[0016] In another embodiment of this application, the electric heating tube 4 is die-cast to fit the inner wall of the first spiral groove 3. The die-casting process has excellent dimensional accuracy, which makes the electric heating tube 4 fit the inner wall of the first spiral groove 3 and the surface of the casting is smooth, reducing the time and cost required for grinding and polishing.
[0017] In another embodiment of this application, end caps 8 are welded to both ends of the heat exchange pipeline 1. The end caps 8 have a hole in the middle, and the diameter of the hole is smaller than the diameter of the heat exchange channel 2. Therefore, the end caps 8 are welded after the heat exchange pipeline 1 and the electric heating tube 4 are die-cast onto the die-casting mold. A connector 7 is welded to the end caps 8. The connector 7 is a threaded joint that can be threadedly connected to the water inlet pipeline and the water outlet pipeline.
[0018] In another embodiment of this application, the depth of the first spiral groove 3 is greater than the diameter of the electric heating tube 4, so that the entire electric heating tube 4 is located in the first spiral groove 3, and about half of the area of the electric heating tube 4 is in contact with the inner wall of the first spiral groove 3.
[0019] In another embodiment of this application, a heat insulation layer 9 is provided between the housing 5 and the heat exchange pipeline 1. The heat insulation layer 9 can reduce the heat exchange between the electric heating tube 4, the housing 5, and the environment.
[0020] In another embodiment of this application, a thermostat 11 is installed on the side wall of the housing 5. The thermostat 11 is used to control the power and heating temperature.
[0021] In another embodiment of this application, the outer wall of the heat exchange pipe 1 is recessed downward to form a first spiral groove 3, and the inner wall of the heat exchange pipe 1 on both sides of the first spiral groove 3 forms a second spiral groove 10. The width of the second spiral groove 10 is the same as that of the first spiral groove 3. The second spiral groove 10 forms a spiral heat exchange channel 2 on the inner wall of the heat exchange pipe 1, increasing the contact area between water and the heat exchange pipe 1. The helix angle of the first spiral groove 3 is 15°, that is, the angle between the spiral line of the first spiral groove 3 and the end face of the heat exchange pipe 1 is 15°.
[0022] Processing and installation procedures: First, the outer wall of the heat exchange pipe 1 is machined into a spiral shape to form the first spiral groove 3. The electric heating tube 4 is bent into a spiral shape equidistant from the first spiral groove 3. The electric heating tube 4 is screwed onto the outer wall of the heat exchange pipe 1 according to the pitch of the first spiral groove 3. The heat exchange pipe 1 and the electric heating tube 4 are installed on the die-casting mold for die casting, so that the electric heating tube 4 and the inner wall of the first spiral groove 3 on the heat exchange pipe 1 fit tightly against each other. The outer surface of the heat exchange pipe 1 is polished, ground and tapped. End caps 8 and connectors 7 are welded to both ends of the heat exchange pipe 1. The shell 5 is fitted onto the heat exchange pipe 1, so that the wiring holes 6 correspond to the two ends of each electric heating tube 4. Then the power cord is welded.
[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A spiral heating element, characterized in that: The system includes a heat exchange pipeline (1), which has a through heat exchange channel (2). The outer wall of the heat exchange pipeline (1) has a first spiral groove (3), and at least one electric heating tube (4) is installed in the first spiral groove (3). The electric heating tube (4) is in contact with the inner wall of the first spiral groove (3). The heat exchange pipeline (1) is covered with a shell (5). The shell (5) has a wiring hole (6). The heat exchange pipeline (1) is provided with connectors (7) at both ends.
2. The spiral heating element according to claim 1, characterized in that: The electric heating tube (4) is die-cast and attached to the inner wall of the first spiral groove (3).
3. The spiral heating element according to claim 1, characterized in that: The heat exchange pipeline (1) has end caps (8) welded to both ends, and connectors (7) welded to the end caps (8).
4. The spiral heating element according to claim 1, characterized in that: The depth of the first spiral groove (3) is greater than the diameter of the electric heating tube (4).
5. The spiral heating element according to claim 1, characterized in that: A heat insulation layer (9) is provided between the shell (5) and the heat exchange pipeline (1).
6. The spiral heating element according to claim 1, characterized in that: A temperature controller (11) is installed on the side wall of the housing (5).
7. The spiral heating element according to claim 1, characterized in that: The wiring hole (6) extends outward to form a conduit.
8. The spiral heating element according to claim 1, characterized in that: The outer wall of the heat exchange pipe (1) is recessed downward to form a first spiral groove (3), and the inner wall of the heat exchange pipe (1) on both sides of the first spiral groove (3) forms a second spiral groove (10).