Heating tube, heating device and water heater
Patent Information
- Application Number
- CN202521951016.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-10
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-09-10
AI Technical Summary
这种结构设计简单，但由于整个加热管膜的方阻是一样的，这就导致了在进行多段加热设计时功率只能均匀分配(电阻可根据公式R＝ρL/(W·H)进行计算，其中ρ为电阻率，和膜的导电性有关，L为发热段两个电极间的长度，W为电极的宽度，如是圆形的，W为电极周长，H为发热膜厚度)
[0016]本实用新型技术方案通过在管体的周向方向上间隔设置多个发热膜层，并在每个发热膜层上沿管体长度方向的两端均设置接线部，可以使得多个发热膜层两端的接线部之间间距保持一致，进而可以使得多个发热膜层之间的功率密度基本相同，能有效避免加热管因功率密度差异大而导致使用寿命缩短的情况。而多个发热膜层设置，在实际使用时可以独立控制每个发热膜层的供电，可以根据实际需要给其中部分或全部发热膜层通电实现发热，使得加热管可以实现多种发热模式，适用范围更广。
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Figure CN224909700U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric heating technology, and in particular to a heating tube, a heating device, and a water heater. Background Technology
[0002] Tubular heating devices are widely used in drinking water, heating, and other pipeline heating fields due to their simple structure, structural stability, and good pressure resistance and deformation resistance. Currently, film heating tubes can be divided into thick-film screen printing heating technology and vapor phase / physical deposition thin-film heating technology. Thick-film screen printing heating technology allows for the fabrication of a screen along a designed path on the outer wall of the tube, enabling different heating powers and the number of heating film segments to be designed according to different paths, resulting in a simple multi-end heating structure. However, for thin-film heating, since it is surface heating, the multi-segment heating power design is usually achieved by designing multiple segments along the axial direction of the tube. This structural design is simple, but because the sheet resistance of the entire heating tube film is the same, the power can only be evenly distributed when designing multi-segment heating (resistance can be calculated using the formula R = ρL / (W·H), where ρ is the resistivity, which is related to the conductivity of the film, L is the length between the two electrodes of the heating segment, W is the width of the electrode (if it is circular, W is the electrode circumference), and H is the thickness of the heating film). If an uneven power distribution design is required, according to the above formula, different power designs are made through L. The resulting heating tube will have a larger power in the heating section with a smaller distance between the electrodes at both ends. This will seriously cause differences in the power density of the heating tube and severely affect its service life. Utility Model Content
[0003] The main purpose of this invention is to provide a heating tube that avoids the shortened service life of the heating tube due to large differences in power density.
[0004] To achieve the above objectives, the heating tube proposed in this utility model includes:
[0005] The tube body is designed to be open at both ends to form a through flow channel;
[0006] Multiple heating film layers are provided on the outer circumferential surface of the tube body, and the multiple heating film layers are distributed circumferentially at intervals on the tube body. Each heating film layer has a wiring portion at both ends along the length direction of the tube body, and the wiring portions at at least one end of the multiple heating film layers are spaced apart from each other.
[0007] Optionally, the wiring portions at one end of the plurality of heating film layers are interconnected, and the wiring portions at the other end of the plurality of heating film layers are spaced apart from each other.
[0008] Optionally, among the plurality of heating film layers, at least one of the heating film layers has a width along the circumference of the tube body that is greater than the width of another heating film layer along the circumference of the tube body.
[0009] Optionally, the width of the plurality of heating film layers is the same along the circumference of the tube body.
[0010] Optionally, the tube body is a ceramic tube.
[0011] Optionally, the tube body is a silicon nitride ceramic tube.
[0012] Optionally, the tube body is a stainless steel tube, and an insulating layer is provided between the tube body and the heating film layer.
[0013] Optionally, the wiring portion is spaced apart from the end face of the tube body to form a mounting portion at the end of the tube body.
[0014] This utility model also proposes a heating device, including two pipe joints and at least one heating tube, wherein the heating tube is connected between the two pipe joints; the heating tube includes a tube body and multiple heating film layers, wherein the tube body is arranged through both ends to form a through flow channel; the multiple heating film layers are all disposed on the outer peripheral surface of the tube body, and the multiple heating film layers are distributed circumferentially at intervals on the tube body, and each heating film layer has a wiring portion at both ends along the length direction of the tube body, and the wiring portions at at least one end of the multiple heating film layers are spaced apart from each other.
[0015] This utility model also proposes a water heater, including an inlet pipe, an outlet pipe, and at least one heating pipe, wherein the heating pipe is located between the inlet pipe and the outlet pipe; the heating pipe includes a pipe body and multiple heating film layers, wherein the pipe body is arranged through both ends to form a through flow channel; the multiple heating film layers are all disposed on the outer circumferential surface of the pipe body, and the multiple heating film layers are distributed circumferentially at intervals on the pipe body, and each heating film layer has a wiring portion at both ends along the length direction of the pipe body, and the wiring portions at at least one end of the multiple heating film layers are spaced apart from each other.
[0016] This invention employs a method of spacing multiple heating film layers along the circumferential direction of the tube body, with wiring terminals at both ends of each heating film layer along the length of the tube body. This ensures consistent spacing between the wiring terminals of the multiple heating film layers, resulting in a relatively uniform power density across them. This effectively prevents the heating tube from experiencing a shortened lifespan due to significant differences in power density. Furthermore, the multiple heating film layers allow for independent power control of each layer during actual use. Power can be supplied to some or all of the heating film layers as needed, enabling the heating tube to achieve various heating modes and broadening its applicability. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in 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 the structures shown in these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the heating tube of this utility model;
[0019] Figure 2 for Figure 1 A schematic diagram of the structure after the heating element is rotated at a certain angle;
[0020] Figure 3 for Figure 2 A schematic diagram of the heating element from another angle;
[0021] Figure 4 for Figure 3 Sectional view at point XX;
[0022] Figure 5 for Figure 3 A cross-sectional view at point YY.
[0023] Explanation of icon numbers:
[0024] 10. Heating tube; 11. Tube body; 111. Through-flow channel; 112. Mounting part; 12. Heating film layer; 13. Wiring part.
[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0026] 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.
[0027] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.
[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text is to include three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0029] This utility model proposes a heating element that can be used in water heaters, heaters, etc.
[0030] In the embodiments of this utility model, such as Figures 1 to 5 As shown, the heating tube 10 includes a tube body 11 and a plurality of (at least two) heating film layers 12. The tube body 11 is arranged through both ends to form a through flow channel 111. The plurality of heating film layers 12 are all disposed on the outer peripheral surface of the tube body 11, and the plurality of heating film layers 12 are distributed circumferentially at intervals in the tube body 11. Each heating film layer 12 has a wiring portion 13 at both ends along the length direction of the tube body 11, and the wiring portions 13 at at least one end of the plurality of heating film layers 12 are spaced apart from each other.
[0031] Specifically, the width of the wiring portion 13 along the circumferential direction of the tube body 11 is consistent with the width of the corresponding heating film layer 12 along the circumferential direction of the tube body 11. The wiring portion 13 can be made of, but is not limited to, silver electrodes, and the heating film layer 12 can be made of, but is not limited to, rare earth thin-film heating materials. In use, each heating film layer 12 can be powered independently, allowing one or more heating film layers 12 to be energized and heated as needed, while other heating film layers 12 remain inactive, or all heating film layers 12 can be energized to heat up. This enables the heating tube 10 to achieve multiple heating modes, broadening its applicability.
[0032] Factors affecting power density, such as the thickness and conductivity of the heating film layer 12, are easily controlled during production. By arranging multiple heating film layers 12 at intervals in the circumferential direction of the tube body 11, and providing wiring portions 13 at both ends of each heating film layer 12 along the length of the tube body 11, the spacing between the wiring portions 13 at both ends of the multiple heating film layers 12 can be kept consistent. This ensures that the power density of the multiple heating film layers 12 is basically the same, effectively avoiding the shortened service life of the heating tube 10 due to large differences in power density.
[0033] Optionally, in the plurality of heating film layers 12, at least one heating film layer 12 has a wider width along the circumference of the tube body 11 than another heating film layer 12. That is, at least some of the heating film layers 12 have different widths, which allows for uneven power distribution. When only the heating film layer 12 with a smaller width is turned on, lower power heating can be achieved; when only the heating film layer 12 with a larger width is turned on, higher power heating can be achieved; and when all heating film layers 12 are turned on, the heating tube can operate at full power. This allows the heating tube to have more heating modes and a wider range of applications. Of course, in other embodiments, the plurality of heating film layers 12 have the same width along the circumference of the tube body 11.
[0034] In some embodiments, the wiring portions 13 at one end of the plurality of heating film layers 12 are interconnected, and the wiring portions 13 at the other end of the plurality of heating film layers 12 are spaced apart. That is, the wiring portions 13 at one end of the plurality of heating film layers 12 are used as a common electrode, and the wiring portions 13 at the other end of the plurality of heating film layers 12 are connected to different lines, which can reduce the number of wires and facilitate wiring.
[0035] In some embodiments, the tube body 11 is a ceramic tube, which gives the tube body 11 good high temperature resistance, corrosion resistance and wear resistance, and a long service life. Optionally, the tube body 11 is a silicon nitride ceramic tube, which gives the tube body 11 good insulation performance, which can effectively prevent leakage and ensure safety when water is heated by the heating tube 10 (water flows through the flow channel 111).
[0036] In other embodiments, the tube body 11 is a stainless steel tube, and an insulating layer is provided between the tube body 11 and the heating film layer 12.
[0037] In some embodiments, the wiring portion 13 is spaced apart from the end face of the tube body 11 to form a mounting portion 112 at the end of the tube body 11. The heating tube 10 can be mounted and fixed through the mounting portion 112 to avoid interference between the wiring portion 13 and the mounting structure.
[0038] This utility model also proposes a heating device, which includes two pipe joints and at least one heating tube 10. The specific structure of the heating tube 10 is as described in the above embodiments. Since this heating device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The heating tube 10 is connected between the two pipe joints.
[0039] In some embodiments, the pipe connector has an inner cavity and a connection port. The through flow channel 111 of the heating pipe 10 communicates with the inner cavity, and the connection port is used to connect an inlet pipe / outlet pipe. In other embodiments, the pipe connector has a first ventilation hole and a second ventilation hole. The end of the heating pipe 10 is fixed at the first ventilation hole, and the second ventilation hole is spaced apart from the heating pipe 10. In use, part of the airflow flows through the through flow channel 111 of the heating pipe 10 through the first ventilation hole, and part of the airflow flows through the outside of the heating pipe 10 through the second ventilation hole.
[0040] This utility model also proposes a water heater, which includes an inlet pipe, an outlet pipe, and at least one heating element 10. The specific structure of the heating element 10 is as described in the above embodiments. Since this water heater adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The heating element 10 is located between the inlet pipe and the outlet pipe.
[0041] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A heating element, characterized in that, include: A tube body, wherein the tube body is arranged through both ends to form a through flow channel; and Multiple heating film layers are provided on the outer circumferential surface of the tube body, and the multiple heating film layers are distributed circumferentially at intervals in the tube body. Each heating film layer has a wiring portion at both ends along the length direction of the tube body, and the wiring portions at at least one end of the multiple heating film layers are spaced apart from each other.
2. The heating tube as described in claim 1, characterized in that, The wiring portions at one end of the plurality of heating film layers are interconnected, and the wiring portions at the other end of the plurality of heating film layers are spaced apart from each other.
3. The heating tube as described in claim 2, characterized in that, Of the plurality of heating film layers, at least one heating film layer has a width along the circumference of the tube body that is greater than the width of another heating film layer along the circumference of the tube body.
4. The heating tube as described in claim 2, characterized in that, The multiple heating film layers have the same width along the circumference of the tube body.
5. The heating tube as described in claim 1, characterized in that, The tube body is a ceramic tube.
6. The heating tube as described in claim 5, characterized in that, The tube body is a silicon nitride ceramic tube.
7. The heating tube as described in claim 1, characterized in that, The tube body is made of stainless steel, and an insulating layer is provided between the tube body and the heating film layer.
8. The heating tube as described in claim 1, characterized in that, The wiring portion is spaced apart from the end face of the tube body to form a mounting portion at the end of the tube body.
9. A heating device, characterized in that, It includes two pipe fittings and at least one heating tube as described in any one of claims 1 to 8, the heating tube being connected between the two pipe fittings.
10. A water heater, characterized in that, It includes an inlet pipe and an outlet pipe, and at least one heating pipe as described in any one of claims 1 to 8, wherein the heating pipe is located between the inlet pipe and the outlet pipe.