Instant fluid heating device capable of preventing high-temperature burnout
By arranging heating wires in zones according to winding density and embedding temperature probes in the instantaneous fluid heating device, the problem of local overheating and melting of the heating wires is solved, achieving high-temperature protection and accurate monitoring of fluid temperature, thus improving the safety and efficiency of the device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-03-10
AI Technical Summary
In existing instantaneous fluid heating devices, the temperature of the heating wire near the water outlet is too high, which can easily lead to melting and corrosion failures, and there is a lack of effective high-temperature protection mechanisms.
The heating wires are arranged in zones according to their winding density. The high-density winding at the inlet forms a high-power heating zone, while the low-density winding at the outlet forms a low-power heating zone. Temperature probes are embedded to monitor the temperature of the core area, and dynamic power adjustment is achieved in combination with a feedback control system.
It effectively avoids melting accidents caused by local overheating, improves the safety and service life of the heating wire, and realizes accurate monitoring of fluid temperature and dynamic adjustment of power.
Smart Images
Figure CN223985372U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of instantaneous fluid heating structure technology, and in particular to an instantaneous fluid heating device that is protected against high-temperature burnout. Background Technology
[0002] Instantaneous fluid heating devices are electric heating devices that can rapidly heat passing fluids, widely used in water heaters, water dispensers, coffee machines, and other equipment requiring the output of high-temperature fluids. These electric heaters typically include an outer shell with an inlet and an outlet, a heating rod assembly extending into the outer shell, and a heating wire wound around the heating rod assembly. The heating wire rapidly heats the fluid inside the outer shell. To achieve instantaneous heating, the heating wire has a high heating power, heating the fluid while simultaneously dissipating heat from the heating wire. However, the fluid temperature near the outlet is higher, and the heat from the heating wire cannot dissipate quickly at this point; over long-term use, the heating wire at this location is prone to melting and corrosion. Therefore, there is a need for an instantaneous fluid heating device that can effectively prevent high-temperature burnout. Utility Model Content
[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an instantaneous fluid heating device that prevents high-temperature burn-out.
[0004] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: an instantaneous fluid heating device that is protected against high temperature burnout, including an outer tube shell with an inlet and an outlet, a heating rod assembly extending into the outer tube shell, and a heating wire wound on the heating rod assembly.
[0005] The heating wire is wound around the heating rod assembly to form a high-power heating zone and a low-power heating zone; the high-power heating zone is located near the water inlet, and the low-power heating zone is located near the water outlet; the winding density of the heating wire in the high-power heating zone is greater than the winding density of the heating wire in the low-power heating zone.
[0006] The heating rod assembly has a temperature probe embedded in it, which extends into the high-power heating zone.
[0007] Optionally, the temperature probe is a thermocouple probe.
[0008] Optionally, the outer shell and heating element assembly are straight tubes, and the heating element assembly coincides with the center line of the outer shell.
[0009] Optionally, the heating rod assembly and the outer shell are spaced apart to form a flow channel; the heating rod assembly is fitted with a spiral flow-blocking component; the spiral flow-blocking component can form a spiral flow channel within the flow channel.
[0010] Optionally, the spiral flow-blocking component is a metal spring structure that can be sleeved on the outside of the heating rod assembly and pressed into the outer shell.
[0011] Optionally, the inner side of the spiral flow-blocking element may be attached to the outer wall of the heating rod assembly, and the outer side may be attached to the inner wall of the outer tube shell.
[0012] Optionally, the heating rod assembly includes a positioning ceramic core and a heating rod shell; the heating wire is wound around the outside of the positioning ceramic core, and the heating rod shell is disposed on the outside of the positioning ceramic core and the heating wire.
[0013] Optionally, the heating rod shell is formed by rolling or forging magnesium oxide powder.
[0014] Optionally, the heating wire winding density of the high-power heating zone is twice that of the heating wire winding density of the low-power heating zone.
[0015] Optionally, the heating wire is wound with increased density from the end of the heating rod assembly near the inlet to the end near the outlet.
[0016] The beneficial effects of this utility model are as follows: 1. By arranging the heating wires in sections according to their winding density, a high-power heating zone is formed at the front end of the water inlet using high-density winding, ensuring the safety of high-power heating by utilizing the efficient heat dissipation characteristics of low-temperature water inlet; a low-power heating zone is formed at the end of the water outlet using low-density winding, effectively reducing the heat load in the high-temperature area and fundamentally avoiding melt-off accidents caused by local overheating. 2. The temperature probe is embedded in the heating rod assembly and extends to the high-power heating zone, which can accurately monitor the temperature changes in the core heating area. The power can be dynamically adjusted through the feedback control system, forming a high-temperature overheat protection mechanism; furthermore, through temperature compensation calculation, the water flow temperature inside the heating tube can be detected, further improving the monitoring of the fluid flow temperature inside the heating tube and the adjustment of the power.
[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0019] Figure 1 This is a schematic diagram of the structure of the instantaneous fluid heating device of this utility model;
[0020] Figure 2 for Figure 1 An exploded view of the instantaneous fluid heating device.
[0021] Explanation of key component symbols:
[0022] 10. Outer tube shell; 11. Inlet; 12. Outlet; 20. Heating rod assembly; 21. Heating wire; 22. Positioning ceramic core; 23. Heating rod shell; 24. Temperature probe; 30. High-power heating zone; 40. Low-power heating zone; 50. Flow channel; 60. Spiral flow obstruction component. Detailed Implementation
[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0024] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.
[0025] 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.
[0026] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0027] Example
[0028] Reference Figure 1 and Figure 2 The present invention proposes an instantaneous fluid heating device that is protected against high temperature burnout, including an outer tube shell 10 with an inlet 11 and an outlet 12, a heating rod assembly 20 extending into the outer tube shell 10, and a heating wire 21 wound on the heating rod assembly 20.
[0029] Heating wire 21 is wound around heating rod assembly 20 to form high-power heating zone 30 and low-power heating zone 40; high-power heating zone 30 is located near water inlet 11, and low-power heating zone 40 is located near water outlet 12; the winding density of heating wire 21 in high-power heating zone 30 is greater than that in low-power heating zone 40.
[0030] The heating rod assembly 20 has a temperature probe 24 embedded in it, which extends to the high-power heating zone 30.
[0031] In this invention, the heating wires 21 are arranged in sections according to their winding density. A high-density winding is used at the front end of the inlet 11 to form a high-power heating zone 30, utilizing the efficient heat dissipation characteristics of the low-temperature inlet water to ensure safe high-power heating. At the end of the outlet 12, a low-density winding is used to form a low-power heating zone 40, effectively reducing the heat load in the high-temperature area and fundamentally avoiding meltdown accidents caused by localized overheating. The temperature probe 24 is embedded in the heating rod assembly 20 and extends to the high-power heating zone 30, accurately monitoring temperature changes in the core heating area. Dynamic power adjustment is achieved through a feedback control system, forming a high-temperature overheat protection mechanism. Furthermore, through temperature compensation calculations, the water flow temperature inside the heating tube can be detected, further improving the monitoring of the fluid flow temperature and power adjustment within the heating tube.
[0032] Specifically, the heating rod has a high internal temperature, requiring a high-temperature resistant temperature detection device for use. Based on the actual high-temperature area temperature, temperature probe 24 is a thermocouple probe.
[0033] In this embodiment, the outer shell 10 and the heating element assembly are straight tubes, and the center line of the heating element assembly coincides with that of the outer shell 10. This facilitates the use of a straight heating element assembly 20 for heating and reduces the process considerations related to bending.
[0034] In this embodiment, the heating rod assembly 20 and the outer shell 10 form a flow channel 50 at intervals; the heating rod assembly 20 is fitted with a spiral flow-blocking member 60; the spiral flow-blocking member 60 can form a spiral flow channel within the flow channel 50. By forming a spiral flow channel within the flow channel 50 through the spiral flow-blocking member 60, the fluid can be prevented from flowing directly from the inlet 11 to the outlet 12, and instead needs to flow upward in a spiral rotation, which effectively increases the resistance of the fluid within the flow channel 50, reduces the velocity of the fluid passing through the flow channel 50, and achieves the effect of low-velocity instantaneous heating.
[0035] In this example, the spiral flow-blocking component 60 is a metal spring structure that can be sleeved on the outside of the heating rod assembly 20 and pressed into the outer shell 10. Without changing the structure of other pipe fittings, the flow-blocking performance of the bolt flow-blocking component can be changed by altering the pitch of the metal spring structure, and it can be easily sleeved and installed together with the heating rod assembly 20.
[0036] Specifically, the inner side of the spiral flow-blocking component 60 can be attached to the outer wall of the heating rod assembly 20, and the outer side can be attached to the inner wall of the outer tube shell 10.
[0037] Furthermore, the inlet 11 is located below the outer shell 10; the outlet 12 is located above the outer shell 10. The fluid flows from below the outer shell 10 upwards, effectively covering the entire heating rod assembly 20 and achieving effective heat exchange during the fluid flow.
[0038] In this embodiment, the heating rod assembly 20 includes a positioning ceramic core 22 and a heating rod shell 23; the heating wire 21 is wound around the outside of the positioning ceramic core 22, and the heating rod shell 23 is disposed on the outside of the positioning ceramic core 22 and the heating wire 21.
[0039] Specifically, the heating rod shell 23 is formed by rolling or forging magnesium oxide powder. By rolling or forging magnesium oxide powder into one piece, the heating wire 21 can be wound around the positioning ceramic core 22 and then rolled into one piece, allowing the heat-insulating heating wire 21 to be in direct contact with the fluid.
[0040] In some embodiments, the winding density of the heating wire 21 in the high-power heating zone 30 is twice that of the winding density of the heating wire 21 in the low-power heating zone 40.
[0041] In other embodiments, the heating wire 21 is wound with increasing density from the end of the heating rod assembly 20 near the inlet 11 towards the end near the outlet 12. This achieves a winding effect where the winding density of the heating wire 21 gradually decreases from the high-power heating zone 30 towards the low-power heating zone 40.
[0042] Furthermore, in order to improve the corrosion resistance of the instantaneous fluid heating device, the outer shell 10 and the spiral flow-blocking component 60 are made of stainless steel.
[0043] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.
Claims
1. A high-temperature burnout-proof instant fluid heating device, comprising an outer shell (10) with a water inlet (11) and a water outlet (12), a heating rod assembly (20) extending into the outer shell (10), and heating wires (21) wound on the heating rod assembly (20); characterized in that: the heating wires (21) are wound on the heating rod assembly (20) to form a high-power heating zone (30) and a low-power heating zone (40); the high-power heating zone (30) is arranged close to the water inlet (11), and the low-power heating zone (40) is arranged close to the water outlet (12); the winding density of the heating wires (21) in the high-power heating zone (30) is greater than that in the low-power heating zone (40); a temperature probe (24) is embedded in the heating rod assembly (20), and the temperature probe (24) extends to the high-power heating zone (30). The temperature probe (24) is a thermocouple probe.
2. The high-temperature burnout resistant instant fluid heating device according to claim 1, characterized in that: The outer shell (10) and the heating tube assembly are straight tubes, and the heating tube assembly is coaxial with the center line of the outer shell (10).
3. The high-temperature burnout resistant instant fluid heating device of claim 1, wherein: The heating rod assembly (20) is spaced from the outer shell (10) to form a flow passage (50); a spiral flow resistance member (60) is provided on the outer side of the heating rod assembly (20); and the spiral flow resistance member (60) forms a spiral flow channel in the flow passage (50).
4. The high-temperature burnout resistant instant fluid heating device of claim 3, wherein: The spiral flow resistance member (60) is a metal spring structure, which can be sleeved on the outer side of the heating rod assembly (20) and pressed into the outer shell (10).
5. The high-temperature burnout resistant instant fluid heating device of claim 4, wherein: The inner side of the spiral flow resistance member (60) can be attached to the outer wall of the heating rod assembly (20), and the outer side can be attached to the inner wall of the outer shell (10).
6. The high-temperature burnout resistant instant fluid heating device of claim 5, wherein: The heating rod assembly (20) comprises a positioning ceramic core (22) and a heating rod shell (23); the heating wires (21) are wound on the outer side of the positioning ceramic core (22), and the heating rod shell (23) is provided on the outer side of the positioning ceramic core (22) and the heating wires (21).
7. The high-temperature burnout resistant instant fluid heating device of claim 1, wherein: The heating rod shell (23) is formed by rolling or forging magnesium oxide powder.
8. The high-temperature burnout resistant instant fluid heating device of claim 7, wherein: The winding density of the heating wires (21) in the high-power heating zone (30) is twice that in the low-power heating zone (40).
9. The high-temperature burnout resistant instant fluid heating device of claim 1, wherein: The winding density of the heating wires (21) increases from the end of the heating rod assembly (20) close to the water inlet (11) to the end close to the water outlet (12).
10. The high-temperature burnout resistant instant fluid heating device of claim 1, wherein: