A ducted fluid heating device

Abstract

The utility model provides a kind of pipeline formula fluid heating device, it relates to fluid heating technical field, the device includes protective shell and the nonmetal heating core being arranged in the inside of protective shell, wherein, nonmetal heating core is mainly composed of nonmetal heating sheet and insulating heat conducting layer, that is, discard the precedent that metal is used as heat conduction in traditional heating device, nonmetal heating sheet provides heat source, and insulating heat conducting layer effectively, quickly conducts heat energy to fluid, realizes the effective use of heat energy, and no metal ion is precipitated in high-temperature use process, solve the pain point in the high-purity fluid heating field of existing semiconductor, photovoltaic etc.

Description

Technical Field

[0001] This utility model relates to the field of fluid heating technology, specifically a pipeline fluid heating device. Background Technology

[0002] Currently, metal heating tubes are commonly used for fluid heating. However, these tubes are prone to releasing metal ions such as iron, chromium, and nickel after contact with certain fluids (ultrapure water, chemical solutions, etc.). This phenomenon has become a core pain point in the field of high-purity fluid heating, such as semiconductors and photovoltaics, because the metal ions will contaminate the high-purity fluid, thereby affecting product yield. To solve this problem, existing methods typically involve wrapping the metal heating tube with high-temperature resistant plastic (Teflon) to create an inert, non-contaminating physical barrier between the metal heating tube and the fluid to be heated. However, as is well known to those skilled in the art, high-temperature resistant plastics such as Teflon have low thermal conductivity, which significantly reduces the heating efficiency of the metal heating tube and increases energy consumption.

[0003] It is evident that designing a fluid heating device that produces no metal ions and has high heating efficiency is a technical problem that urgently needs to be solved in this project. Utility Model Content

[0004] The purpose of this invention is to provide a fluid heating device that produces no metal ions and has high heating efficiency, thereby addressing the shortcomings mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A pipeline-type fluid heating device, comprising: The protective casing is tubular in shape, with an inlet and an outlet at each end. A non-metallic heating core is nested inside the protective shell and located between the liquid inlet and the liquid outlet, thus forming a heating tube segment. The non-metallic heating core includes a non-metallic heating element and an insulating and heat-conducting layer.

[0006] As a preferred embodiment: The insulating and thermally conductive layer is an electrothermal film layer disposed on the inner wall of the non-metallic heating element; or, the insulating and thermally conductive layer is a heat dissipation structure disposed on the inner wall of the non-metallic heating element, the heat dissipation structure comprising a tube adapted to the inner wall of the metallic heating element and a flow channel disposed on the inner surface of the tube for fluid to flow through.

[0007] As a preferred embodiment: The guide channel is a groove or an orifice. When it is a groove, the guide channel is arranged in a spiral shape around the inner wall of the pipe body. When it is an orifice, the guide channel is a honeycomb mesh set inside the pipe body.

[0008] As a preferred embodiment: When the insulating and thermally conductive layer is an electrothermal film layer, the constituent material of the insulating and thermally conductive layer is either an aluminum nitride-based coating or a graphene material; when the insulating and thermally conductive layer is a heat dissipation structure, the constituent material of the insulating and thermally conductive layer is a high thermal conductivity carbon material.

[0009] As a preferred embodiment: It includes a thermal insulation layer disposed on the outer wall of the non-metallic heating core, or the thermal insulation layer is filled between the protective outer shell and the non-metallic heating core.

[0010] As a preferred embodiment: The protective housing includes a main housing and a port housing. The size of the main housing is adapted to the non-metallic heating core. Meanwhile, threaded tightening tubes are fixed at both ends of the non-metallic heating core. The port housing is connected to the tightening tubes by a screw connection, thereby fixing the port housing at both ends of the main housing.

[0011] As a preferred embodiment: The port housing and the tightening tube are connected by a nut lock, and the mating surface between the port housing and the tightening tube is a conical surface.

[0012] As a preferred embodiment: The protective housing is made of metal and is reliably grounded. Meanwhile, the electrodes of the non-metallic heating core are led to the outside of the protective housing and connected to the internal terminals of a ceramic terminal block.

[0013] As a preferred embodiment: The non-metallic heating element is made of silicon nitride.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This solution designs a pipeline-type fluid heating device, which includes a protective shell and a non-metallic heating core disposed inside the protective shell. The non-metallic heating core is mainly composed of a non-metallic heating element and an insulating thermally conductive layer. This abandons the traditional heating device that uses metal as the heat conductor. The non-metallic heating element provides the heat source, and the insulating thermally conductive layer effectively and quickly conducts the heat energy to the fluid, realizing the efficient utilization of heat energy. It can be seen that this solution addresses the shortcomings of existing metal heating tubes and designs a novel fluid heating device. The non-metallic heating core of this device is made of non-metallic material, and no metal ions will be released during high-temperature use, solving the pain points in the heating of high-purity fluids in semiconductor, photovoltaic and other fields. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the pipeline fluid heating device provided by this utility model.

[0016] Figure 2 A schematic diagram of the internal structure of a pipeline fluid heating device provided for utility model.

[0017] Figure 3 Provided for utility model Figure 2 A magnified view of a portion of point A in the middle.

[0018] Figure 4 A schematic diagram of the internal structure of another pipeline-type fluid heating device provided for utility model.

[0019] Figure 5 Provided for utility model Figure 4 A magnified view of a portion of point F in the middle.

[0020] Figure 6 A side view of a pipeline fluid heating device provided for utility model.

[0021] Figure 7 Another side view of the pipe-type fluid heating device provided for the utility model.

[0022] Figure Labels

[0023] 10 is the protective outer shell; 11 is the liquid inlet; 12 is the liquid outlet; 13 is the ceramic terminal block; 14 is the port shell; 15 is the tightening tube; 16 is the nut; 17 is the conical surface; 21 is the non-metallic heating element; 22 is the insulating and heat-conducting layer; 23 is the flow guide groove; 24 is the tube body; 30 is the thermal insulation layer. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be emphasized that the following description is merely exemplary and not intended to limit the scope and application of the present invention.

[0025] This embodiment provides a pipeline-type fluid heating device, such as... Figure 1-2As shown, the device includes a protective outer shell 10 and a non-metallic heating core. The protective outer shell 10 has a tubular structure with an inlet 11 and an outlet 12 at each end. It is understood that the diameter of the protective outer shell 10 can be flexibly selected according to actual needs; this embodiment does not impose a specific limitation. Furthermore, the inlet 11 and outlet 12 can be of the same size, or the outlet 12 can be smaller than the inlet 11. The specific choice depends on the needs, and this embodiment preferably uses the latter. This increases the flow velocity at the outlet 12, thereby creating turbulence and achieving uniform mixing of the fluid downstream. It also increases the stability of the fluid entering the heating device, ensuring that each part of the fluid has a similar heating time, thus improving the overall heating efficiency and temperature uniformity. The non-metallic heating core... The heating core is a tubular structure adapted to the structure of the protective shell 10. It is nested inside the protective shell 10 and located between the liquid inlet 11 and the liquid outlet 12, thus forming a heating tube section. The fluid entering through the liquid inlet 11 will be heated in this heating tube section. The non-metallic heating core includes a non-metallic heating element 21 and an insulating thermally conductive layer 22. In this embodiment, the insulating thermally conductive layer 22 is at least disposed on the inner side of the non-metallic heating core, that is, the side in contact with the fluid. The insulating thermally conductive layer 22 can physically block the non-metallic heating chip from contacting the fluid, preventing leakage and other phenomena, thereby improving the safety of use. At the same time, the insulating thermally conductive layer 22 also has the function of heat conduction, realizing the rapid diffusion of heat energy on the non-metallic heating chip and improving the fluid heating efficiency.

[0026] Specifically, the fluid first flows into the heating tube section through the inlet 11. In this heating tube section, the fluid is heated by the non-metallic heating element 21 and the insulating heat-conducting layer 22. The heated fluid then flows out quickly through the outlet 12. In summary, this embodiment abandons the precedent of using metal as a heat conduction material in traditional heating devices. Instead, it uses a non-metallic heating element 21 to provide the heat source, and the insulating heat-conducting layer 22 effectively and quickly conducts the heat energy to the fluid, realizing the effective utilization of heat energy. Furthermore, no metal ions are released during high-temperature use, solving the pain points in the existing high-purity fluid heating fields such as semiconductors and photovoltaics.

[0027] In a preferred embodiment, the insulating and thermally conductive layer 22 is an electrothermal film layer disposed on the inner wall of the non-metallic heating element 21 by coating or adhesive. In this embodiment, the non-metallic heating element 21 is preferably made of high thermal conductivity silicon nitride material, i.e., silicon nitride ceramic. The electrothermal coating is either an aluminum nitride-based coating or a graphene material, preferably an aluminum nitride-based coating. Specifically, during the high-temperature sintering process of the silicon nitride ceramic, the aluminum nitride-based coating is sprayed onto its outer surface and sintered and carbonized into a single unit. Figure 2-3 As shown.

[0028] Alternatively, the insulating and heat-conducting layer 22 can be a heat dissipation structure made of a material that does not precipitate metal ions, disposed on the inner wall of the non-metallic heating element 21. This heat dissipation structure includes a tube 24 adapted to the inner wall of the metallic heating element and a flow channel 23 disposed on the inner surface of the tube 24 for fluid flow. Figure 4-5 As shown, in this structure, the insulating thermally conductive layer 22 not only physically isolates the non-metallic heating element 21 from the fluid, but also accelerates the diffusion of heat energy. The outer wall of the flow channel 23 functions as the heat dissipation fins on a radiator, expanding the contact area between the fluid and the heat energy and improving the fluid heating speed. In this embodiment, the non-metallic heating element 21 is preferably made of high thermal conductivity silicon nitride material, and the insulating thermally conductive layer 22 is made of high thermal conductivity carbon material. This high thermal conductivity carbon material is connected to the non-metallic heating element 21 by thermal coupling or bonding. In use, the fluid enters the heating tube section through the inlet 11, and the heat energy of the non-metallic heating element 21 is quickly transferred to the fluid through the thermal diffusion effect of the flow channel 23, thereby achieving rapid heating of the fluid.

[0029] like Figure 6 The diagram shows a cross-sectional view of a flow guide trough 23 provided in this embodiment. The flow guide trough 23 is a groove structure. The groove is preferably formed by two adjacent finned plates that are disposed on the inner wall of the tube body 24 of the insulating heat-conducting layer 22 and extend radially. The material of the finned plates is the same as that of the tube body 24. It can be understood that the height of the finned plates is selected as needed to ensure that the fluid can flow normally. Furthermore, in this embodiment, in order to increase the residence time of the fluid in the heating tube section and thus improve the heating efficiency, it is preferable that the finned plates are spirally arranged along the length direction of the inner wall of the tube body 24. That is, the flow guide trough 23 is arranged in a spiral shape around the inner wall of the tube body 24 (not shown in the figure). The spiral shape of the flow guide trough 23 increases the fluid flow resistance on the one hand, prolongs the residence time of the fluid in the heating tube section, and improves the heating efficiency on the other hand, increases the contact time between the fluid and the finned plates, and further improves the heating efficiency.

[0030] like Figure 7 The diagram shown is a cross-sectional view of another flow channel 23 provided in this embodiment. The flow channel 23 is a honeycomb mesh provided inside the tube body 24. The fluid is heated through the honeycomb mesh. It can be understood that the structure constituting the honeycomb mesh is also equivalent to heat dissipation fins, which can accelerate heat transfer and improve heat utilization and fluid heating efficiency.

[0031] The above are schematic diagrams of the two preferred flow channels 23 in this embodiment. Other feasible and reasonable structures are also within the protection scope of this embodiment.

[0032] As a preferred embodiment, to further improve thermal energy utilization and avoid heat loss due to diffusion, a thermal insulation layer 30 is included. This thermal insulation layer 30 is disposed on the outer wall of the non-metallic heating core, such as... Figure 2As shown, or, the thermal insulation layer 30 is filled between the protective outer shell 10 and the non-metallic heating core, such as... Figure 4 As shown; the specific material of the thermal insulation layer 30 can be selected according to actual needs. The thermal insulation layer 30 can concentrate heat energy in the non-metallic heating core and prevent heat energy from diffusing to the protective shell 10.

[0033] In a preferred embodiment, the protective housing 10 includes a main housing and a port housing 14. The size of the main housing is adapted to the non-metallic heating core. Simultaneously, threaded tightening tubes 15 are fixed to both ends of the non-metallic heating core using methods such as adhesive bonding or screwing. The port housing 14 is screwed to the tightening tubes 15, thereby fixing the port housing 14 to both ends of the main housing. Figure 3 As shown in Figure 5; specifically, the port housing 14 and the outer protective housing are connected by a threaded detachable connection, which facilitates the disassembly and assembly of the heating device.

[0034] In this embodiment, it is preferable to have an external thread or a retaining edge on the port housing 14, with the latter being preferred in this embodiment. The port housing 14 and the tightening tube 15 are locked together by a nut 16. Figure 3 As shown in Figure 5, the mating surface of the port housing 14 and the top clamping tube 15 is a conical surface 17. The conical surface 17 design can improve the tightness of the mating between the two. Understandably, if necessary, a sealing gasket can also be configured on the mating conical surface 17 for cushioning to achieve a tighter mating.

[0035] As a preferred embodiment, the protective housing 10 is made of metal and is reliably grounded through a grounding terminal. Meanwhile, the electrodes of the non-metallic heating core are led to the outside of the protective housing 10 and connected to the internal terminals of a ceramic terminal block 13. The external terminals of the ceramic terminal block 13 can be connected to an external power source.

[0036] The operating principle of this embodiment includes: The heating device is installed in the fluid circuit. The fluid enters the heating tube section through the inlet 11. Since the heating tube section is provided with a non-metallic heating element 21 and an insulating heat-conducting layer 22 with a guide groove 23, the fluid will be in full contact with the heat energy in the guide groove 23. The heated fluid then flows out through the outlet 12.

[0037] In summary, this embodiment addresses the shortcomings of existing metal heating tubes by designing a novel fluid heating device. The non-metallic heating core of this device is made of non-metallic material, which prevents the precipitation of metal ions during high-temperature use, thus solving the pain points in existing high-purity fluid heating fields such as semiconductors and photovoltaics. Furthermore, through design improvements to the non-metallic heating core structure (adding a flow guide groove 23), this embodiment not only improves the fluid heating speed and thermal energy utilization rate but also makes it safer and more reliable to use.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pipeline-type fluid heating device, characterized in that, include: The protective casing is tubular in shape, with an inlet and an outlet at each end. A non-metallic heating core is nested inside the protective shell and located between the liquid inlet and the liquid outlet, thus forming a heating tube segment. The non-metallic heating core includes a non-metallic heating element and an insulating and heat-conducting layer.

2. The pipeline fluid heating device according to claim 1, characterized in that: The insulating and thermally conductive layer is an electrothermal film layer disposed on the inner wall of the non-metallic heating element; or, the insulating and thermally conductive layer is a heat dissipation structure disposed on the inner wall of the non-metallic heating element, the heat dissipation structure comprising a tube adapted to the inner wall of the metallic heating element and a flow channel disposed on the inner surface of the tube for fluid to flow through.

3. The pipeline fluid heating device according to claim 2, characterized in that: The guide channel is a groove or an orifice. When it is a groove, the guide channel is arranged in a spiral shape around the inner wall of the pipe body. When it is an orifice, the guide channel is a honeycomb mesh set inside the pipe body.

4. The pipeline fluid heating device according to claim 2, characterized in that: When the insulating and thermally conductive layer is an electrothermal film layer, the constituent material of the insulating and thermally conductive layer is either an aluminum nitride-based coating or a graphene material; when the insulating and thermally conductive layer is a heat dissipation structure, the constituent material of the insulating and thermally conductive layer is a high thermal conductivity carbon material.

5. The pipeline fluid heating device according to claim 1, characterized in that: It includes a thermal insulation layer disposed on the outer wall of the non-metallic heating core, or the thermal insulation layer is filled between the protective outer shell and the non-metallic heating core.

6. The pipeline fluid heating device according to claim 1, characterized in that: The protective housing includes a main housing and a port housing. The size of the main housing is adapted to the non-metallic heating core. Meanwhile, threaded tightening tubes are fixed at both ends of the non-metallic heating core. The port housing is connected to the tightening tubes by a screw connection, thereby fixing the port housing at both ends of the main housing.

7. The pipeline fluid heating device according to claim 6, characterized in that: The port housing and the tightening tube are connected by a nut lock, and the mating surface between the port housing and the tightening tube is a conical surface.

8. The pipeline fluid heating device according to claim 1, characterized in that: The protective housing is made of metal and is reliably grounded. Meanwhile, the electrodes of the non-metallic heating core are led to the outside of the protective housing and connected to the internal terminals of a ceramic terminal block.

9. The pipeline fluid heating device according to claim 1, characterized in that: The non-metallic heating element is made of silicon nitride.

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