Foot bath

Abstract

This utility model provides a foot bath device, including a heating element. The heating element includes a heating tube, a second thermally conductive insulator, and a housing. The housing has a receiving cavity. The heating tube is disposed within the housing. The second thermally conductive insulator is filled in the receiving cavity and located between the heating tube and the housing. The heating tube includes a heating wire, a first thermally conductive insulator, a sleeve, and a lead-out end. The first thermally conductive insulator is filled within the sleeve, the heating wire is embedded within the first thermally conductive insulator, and the lead-out end is located at the end of the sleeve and connected to the heating wire. At least a portion of the lead-out end is located outside the housing. By setting the heating element with double insulation, the electrical insulation performance of the heating element is further improved, which can more effectively reduce the risk of electric shock to the user caused by water heated by the heating element, thus improving the safety performance of the foot bath device.

Description

Technical Field

[0001] This utility model relates to the field of massage equipment, and in particular to a foot bath device. Background Technology

[0002] Existing foot bath devices heat the foot bath water in the foot bath cavity through a heating element. The heating element is usually an electric heating tube. Although the electric heating tube is equipped with thermally conductive insulation, if the electric heating tube is poorly manufactured or the thermally conductive insulation is unevenly distributed, the electric heating tube is easy to become electrified, causing the heated foot bath water to become electrified. This poses a safety hazard such as electric shock to the user. Utility Model Content

[0003] To at least solve one of the above-mentioned technical problems, one objective of this utility model is to provide a foot bath device that is safe, reliable, has good electrical insulation, and effectively reduces the risk of electric shock.

[0004] The foot bath device of this utility model includes a heating assembly, which includes an electric heating tube, a second thermally conductive insulating component, and a housing. The housing has a receiving cavity, and the electric heating tube is disposed inside the housing. The second thermally conductive insulating component is filled in the receiving cavity and located between the electric heating tube and the housing. The electric heating tube includes a heating wire, a first thermally conductive insulating material, a sleeve, and a lead-out end. The first thermally conductive insulating material is filled inside the sleeve, and the heating wire is embedded in the first thermally conductive insulating material. The lead-out end is disposed at the end of the sleeve and connected to the heating wire. At least a portion of the lead-out end is located outside the housing.

[0005] In this embodiment of the invention, a second thermally conductive insulating element is provided outside the heating tube which has a first thermally conductive insulating element. The second thermally conductive insulating element is located between the heating tube and the shell to separate the heating tube and the shell, so that the heating component forms double insulation, which further improves the electrical insulation performance of the heating component. This can more effectively reduce the risk of water heated by the heating component becoming electrified and the user being electrocuted, thereby improving the safety performance of the foot bath.

[0006] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present invention. Attached Figure Description

[0007] Figure 1 This is a cross-sectional schematic diagram of one embodiment of a foot bath device.

[0008] Figure 2 This is a schematic diagram of the structure of a heating component according to one embodiment.

[0009] Figure 3 yes Figure 2 A cross-sectional view.

[0010] Figure 4 yes Figure 2 A schematic diagram of its breakdown.

[0011] Figure 5 This is an exploded view of the heating component in the second embodiment.

[0012] Figure 6 This is a schematic diagram of the heating component in the third embodiment.

[0013] Figure 7 yes Figure 6 A cross-sectional view from one of the perspectives.

[0014] Figure 8 yes Figure 6 Another cross-sectional view.

[0015] Figure 9 yes Figure 6 A schematic diagram of its breakdown.

[0016] Figure 10 yes Figure 6 A schematic diagram of the structure after removing the shell, the second thermally conductive insulation, the first flexible sleeve, and the sealing sleeve.

[0017] Figure 11 This is a schematic diagram of the heating component in the fourth embodiment.

[0018] Figure 12 yes Figure 11 A cross-sectional view from one perspective.

[0019] Figure 13 Figure 11 A cross-sectional view from another perspective.

[0020] Figure 14 yes Figure 11 A schematic diagram of its breakdown.

[0021] Figure 15 yes Figure 11 A schematic diagram of the structure after removing the shell, the second thermally conductive insulation, the first flexible sleeve, and the second flexible sleeve.

[0022] Figure 16 This is a schematic diagram of the structure after the frame and heating components are assembled.

[0023] Figure 17 yes Figure 16 A cross-sectional view.

[0024] Figure 18 This is a cross-sectional schematic diagram of another embodiment of the foot bath device.

[0025] Figure label:

[0026] Body 1, Foot Bath Cavity 11, Massage Mechanism 2, Heating Component 3, Heating Tube 31, Second Thermally Conductive Insulator 32, Housing 33, Heating Wire 311, First Thermally Conductive Insulator 312, Sleeve 313, First Lead-Out End 314, Second Lead-Out End 315, First Tube Section 34, Second Tube Section 35, Spiral Tube Section 36, Bent Tube Section 37, First Heat Pipe 38, First Tail End 381, Second Heat Pipe 39, Second Tail End 391, Conductive Component 392, First End Cap 301, Tube Hole 3011, Cavity 3012, Second End Cap 302, Frame 4, Opening 41, Assembly Part 42, Water Outlet 43, drain head; 44, water cavity; 45, thermostat; 51, thermal fuse; 52, heat-conducting component; 6, assembly part; 61, first groove; 611, second groove; 612, first hole; 613, second hole; 614, through hole; 615, conductive part; 62, recessed part; 621, heat dissipation rib; 622, connecting part; 63, through hole; 631, first flexible sleeve; 71, first plug; 711, first retaining edge; 7111, first clearance part; 712, first sleeve part; 713, second flexible sleeve; 72, second plug; 721, second retaining edge; 7211, second clearance part; 722, second sleeve part; 723, sealing sleeve; 73 Detailed Implementation

[0027] Although the present invention can be readily embodied in various forms of implementation, only some specific embodiments are shown in the accompanying drawings and will be described in detail in this specification. It is also understood that this specification should be regarded as an exemplary description of the principles of the present invention and is not intended to limit the present invention to what is described herein.

[0028] Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present invention, and does not imply that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0029] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, inside, outside, left, right, front, back, etc.) used to explain the structure and movement of the various components of this invention are relative rather than absolute. These descriptions are appropriate when these components are in the positions shown in the drawings. If the descriptions of the positions of these components change, these directional indications also change accordingly.

[0030] It should also be noted that when the connection between components is described as "fixed to" or "set on" another component, the component can be directly on the other component or there may be an intervening component. When a component is described as "connected" to another component, it can be directly connected to the other component or indirectly connected to the other component.

[0031] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided to make the description of the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The drawings are merely illustrative of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0032] The preferred embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0033] The foot bath device of this utility model mainly refers to a product that can perform foot bathing using water or other liquids; some products also have a massage function. (Reference) Figures 1 to 18 As shown, the foot bath includes a body 1, a massage mechanism 2, and a heating element 3. A foot bath cavity 11 is formed in the body. The massage mechanism 2 is located in the foot bath cavity 11 and / or at the bottom of the foot bath cavity 11. The heating element 3 includes an electric heating tube 31, a second thermally conductive insulator 32, and a housing 33. The housing 33 has a receiving cavity. The electric heating tube 31 is located in the housing 33. The second thermally conductive insulator 32 is filled in the receiving cavity and located between the electric heating tube 31 and the housing 33. The electric heating tube 31 includes a heating wire 311, a first thermally conductive insulator 312, a sleeve 313, and a lead-out end. The first thermally conductive insulator 312 is filled in the sleeve 313. The heating wire is embedded in the first thermally conductive insulator. The lead-out end is located at the end of the sleeve 313 and connected to the heating wire 311. At least a portion of the lead-out end is located outside the housing 33. The lead-out end is connected to an external electrical device (such as a power board) to provide power to the heating wire.

[0034] The heating element 31 may be partially or fully embedded in the second thermally conductive insulation element 32. Regardless of whether it is fully or partially embedded, the lead-out ends of the heating element 31 are at least partially located outside the housing to facilitate connection of the lead-out ends to other electronic components via wires. There are usually two lead-out ends, including a first lead-out end 314 and a second lead-out end 315, both of which are usually located at the first end of the housing 33.

[0035] The housing 33 and the sleeve 313 are typically made of thermally conductive metal tubes, such as those made of copper, aluminum, iron, or alloys thereof. The first and second thermally conductive insulators are formed from powdered materials with high thermal conductivity and good insulation properties, such as magnesium oxide powder, boron nitride, and silicon carbide, with magnesium oxide powder being the most common. The first and second thermally conductive insulators can be made of the same powdered material, for example, both of which can be magnesium oxide powder, or they can be made of different powdered materials.

[0036] By providing a second thermally conductive insulating element outside the heating tube which has a first thermally conductive insulating element, and placing the second thermally conductive insulating element between the heating tube and the housing to separate the heating tube and the housing, the heating component forms double insulation, which further improves the electrical insulation performance of the heating component. This can more effectively reduce the risk of water heated by the heating component becoming electrified and users being electrocuted, thereby improving the safety performance of the foot bath.

[0037] The heating element 3 can be directly installed inside the foot bath cavity 11 to heat the water inside the foot bath cavity 11, which simplifies the structure and assembly.

[0038] The foot bath device has a circulating water path connected to the foot bath cavity 11. A heating element is located in the circulating water path to heat the water flowing through it. The heated water then flows into the foot bath cavity, creating a circulating heating system for the foot bath water in the foot bath cavity 11. Specifically, it could be as follows: Figure 1 and Figure 18 As shown, the foot bath has a circulating water path, and a frame 4 is installed on the circulating water path. A water cavity is formed inside the frame 4. The two ends of the heating element are sealed to the frame. The frame is connected to the foot bath cavity through a water pipe. The middle part of the heating element is located inside the frame to heat the water flowing through the water cavity. After the heating element and the frame 4 are assembled, they together form a heating module. By setting the frame with a water cavity, the water cavity can increase the contact area between the heating element and the water, thereby improving the heating efficiency.

[0039] Specifically, the upper end of the frame 4 is an open opening 41, and the left and right ends of the frame 4 are provided with mounting parts 42. The two ends of the heating element 3 are respectively connected to the mounting parts 42. The middle part of the heating element is directly opposite the opening 41. The lower side of the frame 4 away from the opening 41 is provided with a water outlet 43 and a drain head 44. Figure 1 and Figure 18 As indicated by the middle arrow, during a foot bath, the foot bath heater heats the water in the foot bath cavity 11. The water flows from the foot bath cavity 11 to the opening 41 of the frame 4, entering the water cavity 45 of the frame 4. The heating element 3 then heats the water in the water cavity 45. The heated water is discharged from the outlet 43 and flows back into the foot bath cavity through water pipes. After the user finishes the foot bath, the heating element 3 stops working, and the water in the foot bath cavity 11 flows out from the drain head 44 and is discharged from the drain outlet of the foot bath heater.

[0040] The shell 33 is a hollow tubular structure. The shell 33 is compacted using a tube-shrinking process to form the second thermally conductive insulating powder, thus forming the second thermally conductive insulating component 32. Specifically, the second thermally conductive insulating powder is compacted under pressure during the tube-shrinking process to form the second thermally conductive insulating component 32. The compacted density of the second thermally conductive insulating component 32 is greater than the bulk density of the second thermally conductive insulating powder under normal conditions. The bulk density refers to the state of the second thermally conductive insulating powder under normal conditions without external force such as pressure application; the density of the second thermally conductive insulating component formed after compaction is called the compacted density.

[0041] The second thermally conductive insulating powder is assembled into the shell, and the diameter of the shell is reduced through a tube shrinking process to compact the second thermally conductive insulating powder. This makes the second thermally conductive insulating powder easy to assemble and facilitates the fabrication of a compact second thermally conductive insulating component, resulting in high manufacturing efficiency. For example, if the shell diameter before tube shrinking is 6mm (tube thickness 1mm, cavity length 4mm), the thermally conductive insulating powder that can be filled is magnesium oxide powder, with a filling thickness of 4mm. At this point, the magnesium oxide powder is in a relatively loosely packed state under normal pressure, with a bulk density of 0.5g / cm³. 3 By reducing the diameter of the shell to 4.5mm using a tube shrinking process, the thickness of the magnesium oxide powder becomes 2.5mm, and the compacted density of the magnesium oxide powder is 3.5g / cm³. 3 Because the compacted second thermally conductive insulation component reduces or even eliminates the gaps between powder particles, the powder particles form a tight bond, thus the second thermally conductive insulation component has better thermal conductivity, which can conduct more and faster heat out of the heating element, and heat the water outside the heating element more quickly.

[0042] Magnesium oxide powder has excellent thermal conductivity and insulation properties. In some preferred embodiments, magnesium oxide powder is selected as the second thermally conductive and insulating powder, and the compaction density of the second thermally conductive and insulating component can be 2.5–3.5 g / cm³. 3 Magnesium oxide powder is an excellent thermal conductor and insulator. The density of magnesium oxide powder in its bulk state under normal pressure is approximately 0.2–0.5 g / cm³. 3 After compaction, a second thermally conductive insulating component is formed, with its density increasing to 2.5–3.5 g / cm³. 3 This density range satisfies the requirement for relatively rapid heat conduction and facilitates processing, as it does not require a long pressing time to achieve this compactness, thus ensuring the manufacturing efficiency of the heating element.

[0043] The heating element 3 also includes a temperature sensing element, which is located in the receiving cavity and embedded in the second thermally conductive insulating element 32. The temperature sensing element can be partially or completely embedded in the second thermally conductive insulating element 32, as long as its electrical terminals or wires are exposed outside the housing. By embedding the temperature sensing element together with the heating element within the second thermally conductive insulating element, the element can be fixed to the housing via the second thermally conductive insulating element, effectively simplifying the assembly process and the structure. Furthermore, the temperature sensing element, located within the housing, can sense the temperature of the heating element more closely, resulting in faster and more accurate temperature sensing, a quicker response, and reduced problems such as burns caused by overheating.

[0044] The temperature sensing element can be any device with temperature measurement function, and can be one or more. For example, the temperature sensing element can include a temperature sensor, which detects the current temperature and transmits the signal to the control module of the foot bath. The control module controls the heating element to continue working or stop heating. The temperature sensing element can also include a temperature controller 51, such as a reset temperature controller, which can disconnect the circuit when the current temperature exceeds the preset temperature, causing the heating element to stop heating. Once the temperature drops to a certain level, the circuit connection is restored, allowing the heating element to continue working. The temperature sensing element can also include a thermal fuse 52, whose internal fuse melts and disconnects the circuit when the temperature is abnormal, preventing the heating element from continuing to work and providing over-temperature protection.

[0045] In such Figures 2-5 In some embodiments shown, the housing 33 is a hollow tubular structure with an opening at at least one end. The temperature sensing element is disposed at the first end of the housing 33. The heating assembly 3 also includes a first end cap 301 made of flexible material. The first end cap 301 is disposed at the opening of the first end of the housing 33 to seal the opening of the housing 33. The first end cap seals the opening of the housing to enclose the second thermally conductive insulating element inside the housing. The first end cap is usually made of flexible materials such as rubber or thermoplastic elastomer, which provides better sealing and plugging effect for the second thermally conductive insulating element. The first end cap 301 has a tube hole 3011 through which the end of the heating tube passes. By setting the heating tube on the first end cap, the heating tube can be limited, facilitating the assembly and positioning of the heating tube. When the second thermally conductive insulating element is filled into the housing, the heating tube is not easily displaced. The first end cap 301 is also provided with a cavity 3012 recessed into the receiving cavity. The temperature sensing element 6 is disposed in the cavity 3012. This cavity 3012 extends from the end of the shell into the receiving cavity of the shell 33 to form a cavity of a certain length. By providing the cavity, it is convenient to assemble the temperature sensing element. At the same time, when the shell is subjected to external force and its diameter is reduced, the cavity can protect the temperature sensing element. The second end of the shell can also be provided with a second end cap to seal the opening at the second end of the shell. Of course, the second end of the shell can also be directly set as a closed structure.

[0046] The shape of the heating element 31 can be varied.

[0047] like Figure 5 In the illustrated embodiment, the heating element 31 is a spiral heating element, comprising a first segment 34, a spiral segment 36, and a second segment 35. The lead-out ends include a first lead-out end 314 and a second lead-out end 315. The first segment 34 and the second segment 35 are respectively connected to the first lead-out end 314 and the second lead-out end 315. Both the first segment 34 and the second segment 35 extend linearly from the first end of the housing 33 towards the second end of the housing 33. The spiral segment 36 connects the portion of the first segment 34 near the second end of the housing 33 and the portion of the second segment 35 near the second end of the housing 33. The spiral shape of the heating element results in a longer overall length, a larger heating area, and faster heating.

[0048] In other embodiments, such as Figures 3-4 As shown, the heating element 31 includes a first tube segment 34, a bent tube segment 37, and a second tube segment 35. The lead-out ends include a first lead-out end 314 and a second lead-out end 315. The first tube segment 34 and the second tube segment 35 are respectively connected to the first lead-out end 314 and the second lead-out end 315. Both the first tube segment 34 and the second tube segment 35 extend straight from the first end of the shell 33 toward the second end of the shell 33. The bent tube segment 37 is respectively connected to the portion of the first tube segment 34 near the second end of the shell and the portion of the second tube segment 35 near the second end of the shell. The bent tube segment 37 is composed of multiple straight tube segments bent and connected. Specifically, both the first lead-out end 314 and the second lead-out end 315 are exposed at the first end of the housing 33. The end of the heating element 31 connected to the first lead-out end 314 extends from the first end of the housing 33 along the length of the housing 33 to a point near the second end of the housing 33. After a bend, it extends at an angle towards the first end of the housing 33 for a certain length, then bends again and extends at an angle towards the second end of the housing, before finally extending from the second end of the housing back to the first end of the housing along the length of the housing. The number of bends in the bent section 37 can be increased as needed. Having a bent section in the heating element can also increase the overall length of the heating element, resulting in a larger heating area and faster heating.

[0049] In some other embodiments, such as Figures 7-15As shown, the heating element 31 includes a first heat pipe 38 and a second heat pipe 39. The first heat pipe 38 and the second heat pipe 39 extend linearly along the length of the housing 33. The leads include a first lead-out end 314 and a second lead-out end 315. The first heat pipe 38 has a first lead-out end 314 and a first tail end 381 at its two ends, respectively. The second heat pipe 39 has a second lead-out end 315 and a second tail end 391 at its two ends, respectively. Both the first lead-out end 314 and the second lead-out end 315 are exposed at the first end of the housing 33, and both the first tail end 381 and the second tail end 391 are exposed at the second end of the housing 33. The first tail end 381 and the second tail end 391 are connected by a conductive element 392, or the first tail end 381 and the second tail end 391 are connected to form an integral U-shaped structure. The conductive element 392 can be, for example,... Figure 9 and Figure 10 The U-shape shown can also be like... Figure 14 and Figure 15 The conductive component, which can be a straight strip or any other arbitrary shape, can have the same material and properties as the lead-out end. Typically, the two ends of the conductive component are welded to the first and second tail ends using methods such as welding. Furthermore, the first and second heat pipes are connected at the first and second tail ends via the conductive component. This eliminates the need for bending at the larger diameter sleeve of the heating element, allowing the first and second lead-out ends to be located at the same end of the casing. The conductive connection structure brings the first and second heat pipes closer together, further reducing the overall size of the heating assembly.

[0050] In some embodiments, such as Figures 6-17 As shown, a heat-conducting element 6 is also provided inside the cavity. The heat-conducting element 6 has a higher thermal conductivity than the second heat-conducting insulating element 32. The heat-conducting element 6 is usually made of a metal material with good thermal conductivity, such as aluminum, copper, and metal alloys. The heating element 31 contacts the heat-conducting element 6 to transfer heat to it. This contact can be partial or complete, with the heat-conducting element completely covering the heating element, and all outer surfaces of the heating element in contact with the heat-conducting element. Of course, it can also be... Figures 2-5 In this embodiment, a heat-conducting component is also provided. The heat-conducting component contacts both the heating element and the temperature-sensing component, allowing the temperature-sensing component to detect temperature more quickly and thus control the water temperature in the foot bath. When the temperature-sensing component includes a thermal fuse, it can cut off the power supply circuit of the heating element 3 when an abnormal temperature is detected, preventing the heating element from burning out. Compared to the temperature-sensing component indirectly measuring the temperature of the heating element by measuring the temperature of the second thermally conductive insulating component, the temperature-sensing component can more accurately measure the temperature of the heating element through the heat-conducting component, enabling the foot bath to respond quickly to abnormal temperatures.

[0051] In some embodiments, the heat-conducting component 6 can be integrally formed with the heating element 31 during die casting. The heat-conducting component is formed by die casting and is integrally connected with the heating element pre-placed in the mold during molding. This allows the heating element and the heat-conducting component to fit more tightly, resulting in higher heat conduction efficiency, and eliminates the need for additional assembly structures, simplifying assembly.

[0052] A flexible sleeve is fitted around the end of the heat-conducting component 6 near the housing 33. This flexible sleeve seals the gap between the heat-conducting component 6 and the housing 33, allowing the second thermally conductive insulating component 32 to be encapsulated within the housing 33. The flexible sleeve can be made of flexible materials such as rubber or thermoplastic elastomers, which provide better sealing and plugging of the second thermally conductive insulating component. The flexible sleeve seals the second thermally conductive insulating component, preventing leakage from the gap between the heat-conducting component and the housing. Furthermore, the flexible sleeve prevents collisions between the housing and the heat-conducting component during compression, providing space for compression and acting as a buffer.

[0053] The heat-conducting component 6 has a mounting position, in which the temperature-sensing component is embedded. The mounting position not only effectively limits the temperature-sensing component, but also, since the heat-conducting component is generally stronger than the second heat-conducting insulating component, it provides good protection for the temperature-sensing component, preventing damage when the housing is subjected to external pressure.

[0054] The heat-conducting component 6 includes an assembly part 61, which is located at the first end of the housing. The mounting position is located at the assembly part 61, meaning that the temperature sensing component is assembled at the first end of the housing. The assembly part can transfer the heat from the heating element to the temperature sensing component, making temperature measurement faster and more accurate. Furthermore, assembling the temperature sensing component on the assembly part at the end of the housing facilitates the extension of the electrical terminals or wires of the temperature sensing component from the end of the housing.

[0055] The heat-conducting component 6 also includes a conductive portion 62 connected to the assembly portion 61, which extends along the length of the housing 33. The conductive portion increases the heat transfer area, allowing the heat-conducting component to absorb more heat more quickly, further improving the speed of temperature sensing and making temperature measurement faster and more accurate.

[0056] The conductive part 62 may extend only a short section, such as Figures 6-10 In the embodiment shown, the flexible sleeve may include a first flexible sleeve 71, which is disposed at the first end of the housing, and a sealing sleeve 73 is provided at the other end of the housing to seal the gap between the heating element and the housing. The conductive portion may also be a long section extending to the second end of the housing; a longer conductive portion can further improve the temperature measurement speed, such as... Figures 11-17In the embodiment shown, the flexible sleeve may include a first flexible sleeve 71 and a second flexible sleeve 72. The first flexible sleeve 71 and the second flexible sleeve 72 are respectively used to be disposed at both ends of the housing 33 and respectively seal the gap between the heat-conducting element 6 at both ends and the housing 33.

[0057] like Figure 14 and Figure 15 As shown, the outer wall of the heat-conducting component 6 has a recess 621 that matches the shape of the heating tube 31, and a portion of the heating tube 31 is located in the recess 621. By providing a recess on the heat-conducting component that matches the shape of the heating tube, the outer wall surface of the heating tube and the outer wall surface of the recess are closely fitted, resulting in a larger contact area and tighter fit between the heating tube and the heat-conducting component, leading to higher heat conduction efficiency. Specifically, when the heat-conducting component is integrally formed with the heating tube during die casting, the recess is automatically formed during die casting, thus fusing the heating tube and the recessed wall surface into one piece, resulting in even higher heat transfer efficiency. Figures 6-10 In the illustrated embodiment, both the assembly portion and the conductive portion of the heat-conducting component are provided with recesses, such as... Figures 11-15 In the embodiment shown, the recess is only provided on the conductive part, and the other areas of the conductive part, except for the outer wall surface where the heating tube is located, are wrapped by the second thermally conductive insulating member. The second thermally conductive insulating member also wraps the remaining outer wall surface of the heating tube that is not in contact with the conductive part.

[0058] In some preferred embodiments, such as Figures 2-15 As shown, the temperature sensing element includes a thermostat 51 and a thermal fuse 52. The thermostat 51 is typically a reset thermostat, which effectively controls the start and stop of the heating element according to the temperature set by the user on the foot bath, ensuring a constant temperature for the foot bath water. The thermal fuse 52 can melt and stop the heating element from heating in case of abnormal temperature. By integrating both the thermostat 51 and the thermal fuse 52 into the heating element, the temperature can be controlled within a suitable range under normal operation, improving the comfort of the water temperature during foot bath use. Furthermore, it can disconnect heating in case of overheating, reducing the risk of scalding or dry burning due to abnormal temperature, making the product safer and more reliable.

[0059] like Figures 2-5 In the embodiment shown, when the temperature sensing element includes a thermostat 51 and a thermal fuse 52, the cavity 3012 includes two cavities of different shapes to respectively assemble the thermostat and the thermal fuse, and the two cavities respectively protect the thermostat and the thermal fuse.

[0060] In an embodiment with a heat-conducting component, the assembly portion on the heat-conducting component has a mounting position for mounting a temperature-sensing component. The mounting position can be a mounting groove, a mounting hole, or both a mounting groove and a mounting hole.

[0061] like Figures 7-10In the illustrated embodiment, the mounting position includes a mounting groove. The outer wall surface of the assembly part 61 is provided with a mounting groove, which includes a first groove 611 and a second groove 612. The thermostat 51 and the thermal fuse 52 are respectively embedded in the first groove 611 and the second groove 612. The thermostat and thermal fuse are embedded in the first and second grooves, thus protecting them through the heat-conducting element. This is especially beneficial when the housing is compressed by external force, reducing or even preventing damage to the thermostat and thermal fuse. Furthermore, the first and second grooves are located on the outer surface of the heat-conducting element, facilitating the assembly of the thermostat and thermal fuse.

[0062] The heat-conducting component 6 has four sides. A first groove 611 and a second groove 612 are respectively located on the opposite first and second sides of the heat-conducting component 6. The opposite third and fourth sides of the heat-conducting component 6 are respectively provided with semi-circular recesses 621 that match the shape of the heating element. The heating element 6 includes a first straight tube connected to a first lead-out end and a second straight tube connected to a second lead-out end. The first and second straight tubes are respectively embedded in the two recesses. The recesses on the heat-conducting component that match the shape of the heating element result in a larger contact area between the heating element and the heat-conducting component, a tighter fit, and higher heat conduction efficiency. The thermostat, thermal fuse, first tube segment, and second tube segment are respectively located on the four sides of the heat-conducting component, ensuring that their assembly does not interfere with each other and that they all have sufficient contact with the heat-conducting component. This ingenious design significantly reduces the size of the heat-conducting component. Specifically, as shown... Figures 2-5 In the embodiment shown, the first straight pipe is a first pipe segment 34, and the second straight pipe is a second pipe segment 35. A portion of the first pipe segment 34 and a portion of the second pipe segment 35 are respectively embedded in two recesses 621. The structure of this heat-conducting component can also be applied to... Figures 6-17 In the embodiment shown, the first straight pipe is a part of the first heat pipe 38, the second straight pipe is a part of the second heat pipe 39, and the middle portions of the first heat pipe and the second heat pipe are respectively embedded in the recessed portion.

[0063] The area on the conductive part 62 without the mounting groove and recess can be provided with multiple heat dissipation ribs 622. The heat dissipation ribs can increase the heat transfer area, and the heat from the heating tube can be transferred to the second thermally conductive insulating component more quickly.

[0064] In other embodiments, such as Figures 11-15As shown, the mounting position includes mounting holes, including a first hole 613 and a second hole 614. The assembly part 61 has a preset length. The first hole 613 and the second hole 614 are located on the assembly part 61. The thermostat 51 is located in the first hole 613, and at least a portion of the thermal fuse 52 is located in the second hole 614. The thermostat being located in the first hole allows it to be enclosed by the heat-conducting element, and the assembly part protects the thermostat. Furthermore, the large contact area between the thermostat and the heat-conducting element enables faster and more accurate temperature measurement. The portion of the thermal fuse located within the housing cavity is also protected by the assembly part in the second hole, which further increases the contact area with the heat-conducting element, allowing for a rapid response in case of abnormal temperatures and preventing problems such as continuous dry burning of the foot bath. The first hole 613 and the second hole 614 can be either through holes or blind holes. To limit the movement of the thermostat 51 and the thermal fuse 52, and to increase the contact area with the heat-conducting component, it is preferable that both the first hole 613 and the second hole 614 be blind holes. The terminals or electrical wires of the thermostat 51 and the thermal fuse 52 are exposed outside the blind holes. The first hole 613 and the second hole 614 also limit the movement of the temperature sensing component, thus better securing it.

[0065] In other embodiments, the mounting position may include a mounting groove and a mounting hole, the heat-conducting component is provided with the mounting groove and the mounting hole, one of the thermostat and the thermal fuse is disposed in the mounting groove, and the other of the thermostat and the thermal fuse is disposed in the mounting hole.

[0066] In other embodiments, the heat-conducting element 6 includes an assembly portion 61 and a conductive portion 62 connected to each other. The assembly portion 61 is located at the first end of the housing 33, and the conductive portion 62 extends from the assembly portion 61 to the second end of the housing 33 along the length of the housing 33, that is, the heat-conducting element 6 extends along the entire length of the housing. This makes temperature measurement faster, the overall heat transfer effect of the heating element higher, and the heat distribution on the surface of the housing more uniform. Both the first lead-out end and the second lead-out end are exposed at the first end of the housing. Two recesses 621 adapted to the shape of the heating tube are provided at intervals on the surface of the conductive portion 62, and the first straight tube and the second straight tube of the heating tube are respectively embedded in the two recesses 621. This structure is similar to... Figures 2-5 When the heating element structure shown is assembled, the first straight tube is the first tube segment 34, and the second straight tube is the second tube segment 35. The first tube segment 34 and the second tube segment 35 are respectively embedded in the two recesses 621. This structure is applied to, for example... Figures 6-15 In the electric heating tube structure shown, the first straight tube is a part of the first heat pipe 38, the second straight tube is a part of the second heat pipe 39, both the first heat pipe and the second heat pipe are cylindrical, the recess is formed as a semi-circle, and a part of the first heat pipe 38 and a part of the second heat pipe 39 are respectively embedded in the two recesses 621.

[0067] like Figures 11-15As shown, the assembly part 61 has two through holes 615 extending along its length (i.e., the length of the shell). The two ends of the heating element pass through these two through holes 615 respectively. Since the assembly part has a preset length, the through holes 615 also have a certain length. By assembling the heating element through two through holes of a certain length, the contact area between the heating element and the heat-conducting component is large, enabling rapid heat transfer. The through holes also serve a positioning function for the heating element, better securing it. When the heat-conducting component 6 is formed integrally with the heating element during die casting, the heating element 31 can be designed to pass through the assembly part 61 during die casting. This scheme is similar to forming two through holes through which the heating element passes. The heating element and the heat-conducting component are tightly fitted together, resulting in higher heat transfer efficiency.

[0068] Along the circumference of the casing, heat dissipation ribs can also be provided on the surface of the conductive portion 62 between the two recesses 621 to allow for faster heat transfer. Specifically, as shown... Figures 9-10 As shown, the conductive part has four sides, two recesses are provided on the surfaces of two opposite sides, and heat dissipation ribs 622 are provided on the other two opposite surfaces.

[0069] The following is based on Figures 11-18 Taking the foot bath device shown as an example, let's provide a more detailed explanation:

[0070] The foot bath device of this embodiment includes a body 1, a massage mechanism 2, and a heating component 3. A foot bath cavity 11 is formed in the body. The massage mechanism 2 is located at the bottom of the foot bath cavity 11 for massaging the soles of the feet. The heating component 3 includes an electric heating tube 31, a second thermally conductive insulator 32, and a housing 33. The housing 33 has a receiving cavity. The electric heating tube 31 is located inside the housing 33. The second thermally conductive insulator 32 is filled in the receiving cavity and located between the electric heating tube 31 and the housing 33. The electric heating tube 31 includes a heating wire 311, a first thermally conductive insulator 312, a sleeve 313, and a lead-out end. The first thermally conductive insulator 312 is filled in the sleeve 313. The heating wire is embedded in the first thermally conductive insulator. The lead-out end is located at the end of the sleeve 313 and connected to the heating wire 311. At least a portion of the lead-out end is located outside the housing 33. By providing a second thermally conductive insulating element outside the heating tube which has a first thermally conductive insulating element, and placing the second thermally conductive insulating element between the heating tube and the housing to separate the heating tube and the housing, the heating component forms double insulation, which further improves the electrical insulation performance of the heating component. This can more effectively reduce the risk of water heated by the heating component becoming electrified and users being electrocuted, thereby improving the safety performance of the foot bath.

[0071] The shell 33 is a hollow tubular structure. The shell 33 is compacted using a tube-shrinking process to form the second thermally conductive insulating powder, thus forming the second thermally conductive insulating component 32. In other words, the second thermally conductive insulating component 32 is formed from thermally conductive insulating powder that has been compacted by external force. The second thermally conductive insulating powder is magnesium oxide powder, and the compaction density of the second thermally conductive insulating component can be 2.5–3.5 g / cm³. 3 The second thermally conductive insulating powder is assembled into the shell, and the diameter of the shell is reduced through a tube shrinking process to compact the second thermally conductive insulating powder. This makes the second thermally conductive insulating powder easy to assemble and facilitates the fabrication of a compact second thermally conductive insulating component, resulting in high manufacturing efficiency. Because the compacted second thermally conductive insulating component reduces or even eliminates the gaps between powder particles, the particles adhere tightly together. This results in better thermal conductivity, allowing more and faster heat transfer from the heating element to the water pipe, thus heating the water outside the heating element more quickly. Magnesium oxide powder is an excellent thermally conductive insulating material; its density in its bulk state under normal pressure is approximately 0.2–0.5 g / cm³. 3 After compaction, a second thermally conductive insulating component is formed, with its density increasing to 2.5–3.5 g / cm³. 3 This density range satisfies the requirement for relatively rapid heat conduction and facilitates processing, as it does not require a long pressing time to achieve this compactness, thus ensuring the manufacturing efficiency of the heating element.

[0072] The heating element 31 includes a first heat pipe 38 and a second heat pipe 39. The leads include a first lead 314 and a second lead 315. The first heat pipe 38 has a first lead 314 and a first tail end 381 at both ends, and the second heat pipe 39 has a second lead 315 and a second tail end 391 at both ends. The first and second heat pipes 38 extend linearly from the first end of the housing 33 along the length of the housing 33 to the second end of the housing 33. Both the first lead 314 and the second lead 315 are exposed at the first end of the housing 33. The heating element is configured as two straight strips, the first and second heat pipes, to facilitate fitting with the recessed portion of the heat-conducting element, forming a small heating component. The first tail end 381 and the second tail end 391 are both exposed at the second end of the housing 33. The first tail end 381 and the second tail end 391 are connected by a conductive element, which can be of any shape, for example, a... Figures 14-15 The design is a straight strip. The first heat pipe and the second heat pipe are connected at the first and second ends by a conductive element. This eliminates the need to bend the heating pipe at the larger diameter sleeve, allowing the first and second leads to be located at the same end of the housing. The conductive connection structure allows the first and second heat pipes to be closer together, further reducing the overall size of the heating element.

[0073] The housing 33 also houses a heat-conducting component 6. The heat-conducting component 6 has higher thermal conductivity than the second heat-conducting insulator 32. By adding the heat-conducting component, the heat transfer area of ​​the heating element is increased. The heat from the heating element can be transferred to the second heat-conducting insulator more quickly, allowing the housing to transfer heat to the external water more rapidly, thus improving the heating efficiency of the heating element. The heat-conducting component 6 is integrally formed with the heating element 31 during die-casting. This die-casting process, where the heat-conducting component is integrated with the heating element pre-placed in the mold, ensures a tighter fit between the heating element and the heat-conducting component, resulting in higher thermal conductivity. Furthermore, it eliminates the need for additional assembly structures, simplifying assembly.

[0074] The heat-conducting component 6 includes an assembly part 61, a conductive part 62, and a connecting part 63. The conductive part 62 connects the assembly part 61 and the connecting part 63. The assembly part 61 is mainly used to install the temperature sensing component, making it easy to assemble and protecting it during shell shrinkage to reduce the risk of damage. The assembly part's location at the end of the shell facilitates the extension of the temperature sensing component's electrical wiring outside the shell. Specifically, the assembly part 61 has mounting positions, including a first hole 613 and a second hole 614. The temperature sensing component includes a thermostat 51 and a thermal fuse 52. The thermostat 51 is located in the first hole 613, and the thermal fuse 52 is located in the second hole 614. The thermostat being located in the first hole allows it to be enclosed by the heat-conducting component, protecting it. Furthermore, the large contact area between the thermostat and the heat-conducting component enables faster and more accurate temperature measurement. The portion of the thermal fuse located within the housing cavity, positioned within the second hole, is also protected by the assembly portion. This also increases the contact area with the heat-conducting component, enabling a rapid response in case of abnormal temperatures and preventing problems such as continuous dry burning of the foot bath. Of course, in other embodiments, the heat-conducting component may only include the assembly portion.

[0075] The assembly part 61 is located at the first end of the shell and has a preset length. The assembly part 61 has two through holes 615 extending along its length (i.e., the length direction of the shell). Therefore, the through holes 615 have a certain length. The ends of the first heat pipe 38 connected to the first lead-out end 314 and the second heat pipe 39 connected to the second lead-out end 315 are respectively inserted into the two through holes 615. By assembling the heating element through two through holes of a certain length, the contact area between the heating element and the heat-conducting component is larger, enabling rapid heat transfer. The through holes also serve a positioning function for the heating element. When the heat-conducting component 6 is formed integrally with the heating element 31 during die casting, the two are formed directly during die casting. The first heat pipe 38 and the second heat pipe 39 are pre-placed in the mold and then encased in molten heat-conducting component material before cooling and solidification. This method ensures a tight fit between the heating element and the heat-conducting component, resulting in higher heat transfer efficiency.

[0076] The conductive part 62 has two opposite sides with recesses 621 that match the shape of the heating tube. The sleeve 313 of the heating tube 31 serves as the outer wall of the heating tube 31. The sleeve 313 is cylindrical, and the recesses 621 are semi-circular. A portion of the first heat pipe 38 and a portion of the second heat pipe 39 are respectively attached to the two recesses 621. The area of ​​the conductive part 62 that is not in contact with the heating tube 31 (non-recessed area) is wrapped by the second thermally conductive insulator 32. The remaining outer wall surfaces of the first heat pipe 38 and the second heat pipe 39 that are not attached to the recesses 621 are also wrapped by the second thermally conductive insulator 32. Thus, the conductive part can quickly transfer the heat of the heating tube to the second thermally conductive insulator, which then transfers the heat to the shell and then to the external liquid to be heated (such as foot bath water). The second thermally conductive insulating component wraps around part of the outer wall of the conductive part and part of the outer wall of the heating element, separating the heating element and the thermally conductive component from the shell, thus achieving the effects of insulation and heat conduction.

[0077] A connecting part 63 is located at the second end of the housing 33. The connecting part 63 also has two through holes 631. The ends of the first heat pipe 38 connected to the first tail end 381 and the second heat pipe 39 connected to the second tail end 391 respectively pass through the two through holes 631. These through holes have the same effect as the through holes in the assembly part, both increasing the contact area between the heating pipe and the heat-conducting component, improving the heat transfer speed, and also positioning the heating pipe. When the heat-conducting component 6 is formed integrally with the heating pipe during die casting, the two through holes are formed directly during die casting. The first heat pipe 38 and the second heat pipe 39 are pre-placed in the mold, then encased in molten heat-conducting component material and cooled to form the final shape. The heating pipe and the heat-conducting component are tightly bonded together, resulting in higher heat transfer efficiency.

[0078] The heat conduction part 62 extends from the assembly part 61 along the length of the housing 33 to the second end of the housing 33. That is, the heat conduction part extends along the entire length of the housing, and its length is almost the same as that of the housing. This makes the overall heat transfer effect of the heating component higher and the heat distribution on the surface of the housing more uniform.

[0079] Multiple heat dissipation ribs 622 are provided on the surface of the conductive part 62, which can improve heat transfer efficiency.

[0080] Flexible sleeves are fitted onto the outer walls of both ends of the heat-conducting component 6. These flexible sleeves include a first flexible sleeve 71 and a second flexible sleeve 72. Specifically, the first flexible sleeve 71 is fitted onto the outer periphery of the assembly part 61. The first flexible sleeve 71 seals the gap between the assembly part 61 and the housing 33, thereby sealing the first end of the housing 33 and encapsulating the second thermally conductive insulating component 32 within the housing 33. The first flexible sleeve 71 can be made of flexible materials such as rubber or thermoplastic elastomers, which provide better sealing and plugging effects for the second thermally conductive insulating component. The first flexible sleeve seals the second thermally conductive insulating component, preventing leakage from the gap between the heat-conducting component and the housing. Furthermore, the first flexible sleeve provides compression space during housing shrinkage, acting as a buffer and preventing hard collisions between the housing and the assembly part.

[0081] like Figure 12 and Figure 13 As shown, the first flexible sleeve 71 is fitted onto the assembly part 61 and is interference-fitted between the assembly part and the housing. The first flexible sleeve 71 has a first plug 711, a first clearance part 712, and a first connecting part 713. The first clearance part 712 connects the first plug 711 and the first connecting part 713. The first connecting part is closer to the end of the housing than the first plug. The first plug 711 is fitted onto the assembly part and also includes a first retaining edge 7111 extending towards the central axis of the first flexible sleeve 71. A first step is provided at the connection between the assembly part 61 and the conductive part 62. The first retaining edge 7111 is engaged with the end face of the first step. The structure of the first plug 711 can form a sealing effect in both the length and diameter directions of the housing, resulting in a good sealing effect. The first clearance part 712 is a thinned area on the first flexible sleeve, which can provide accommodation space when the first plug 711 and the first connecting part 713 are compressed and deformed. The first sleeve forms a secondary seal, improving the sealing effect of the first flexible sleeve.

[0082] A second flexible sleeve 71 is fitted around the outer periphery of the connecting part 63. The material and function of the second flexible sleeve 72 are basically the same as those of the first flexible sleeve 71. The second flexible sleeve 72 is used to seal the gap between the connecting part 63 and the housing 33, and to seal the second end of the housing 32, so that the second thermally conductive insulating element is encapsulated inside the housing. The second flexible sleeve has the function of sealing the second thermally conductive insulating element, preventing the second thermally conductive insulating element from leaking out from the gap between the thermally conductive element and the housing. The second flexible sleeve can provide compression space when the housing is contracted, playing a buffering role and avoiding hard collision between the housing and the connecting part.

[0083] The first flexible sleeve 71 is fitted onto the connecting portion 63 and is interference-fitted between the connecting portion and the housing. The second flexible sleeve 72 has a second plug 721, a second clearance portion 722, and a second fitting portion 723. The second clearance portion 722 connects the second plug 721 and the second fitting portion 723 respectively. The second fitting portion is closer to the end of the housing than the second plug. The second plug 721 is fitted onto the outer wall surface of the connecting portion and includes a second retaining edge 7211 extending towards the central axis of the second flexible sleeve. A second step is provided at the connection between the connecting portion 63 and the conductive portion 62. The second retaining edge 7211 is engaged with the end face of the second step. This structure of the second plug can simultaneously form a sealing effect in both the length and diameter directions of the housing, resulting in excellent sealing performance. The second clearance portion 722 is a thinned area on the second flexible sleeve, which provides accommodating space when the second plug 721 and the second fitting portion 723 are compressed and deformed. The second fitting portion forms a secondary seal, improving the sealing effect of the second flexible sleeve.

[0084] Although this application has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Because this application can be embodied in many forms without departing from the spirit or essence of the embodiments, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A foot bath device, characterized in that, The device includes a heating element comprising a heating tube, a second thermally conductive insulator, and a housing. The housing has a receiving cavity, the heating tube is disposed within the housing, the second thermally conductive insulator is filled in the receiving cavity and located between the heating tube and the housing, the heating tube comprises a heating wire, a first thermally conductive insulator, a sleeve, and a lead-out end, the first thermally conductive insulator is filled within the sleeve, the heating wire is embedded within the first thermally conductive insulator, the lead-out end is located at the end of the sleeve and connected to the heating wire, and at least a portion of the lead-out end is located outside the housing.

2. The foot bath device according to claim 1, characterized in that, The heating element also includes a temperature sensing element, which is fixed in the receiving cavity.

3. The foot bath device according to claim 2, characterized in that, The housing is a hollow tubular structure with an opening at at least one end. The temperature sensing element is disposed at the first end of the housing. The heating assembly also includes a first end cap made of flexible material, which is disposed at the opening of the first end of the housing to seal the opening of the housing. The first end cap has a tube hole, through which the end of the heating element passes. The first end cap has a cavity recessed into the receiving cavity of the housing, and the temperature sensing element is disposed in the cavity.

4. The foot bath device according to claim 2, characterized in that, The cavity is also provided with a heat-conducting component, which has a higher thermal conductivity than the second heat-conducting insulating component. The heat-conducting component is in contact with the heating element and the temperature sensing component, respectively.

5. The foot bath device according to claim 4, characterized in that, The heat-conducting component is integrally formed with the heating element during die casting.

6. The foot bath device according to claim 4, characterized in that, At least a portion of the heat-conducting element is located at the end of the housing, and a flexible sleeve is fitted onto the end of the heat-conducting element near the housing. The flexible sleeve is used to seal the gap between the heat-conducting element and the housing, so that the second heat-conducting insulating element is encapsulated within the housing.

7. The foot bath device according to claim 4, characterized in that, The heat-conducting component has a mounting position, and the temperature-sensing component is embedded in the mounting position.

8. The foot bath device according to claim 7, characterized in that, The heat-conducting component includes an assembly part and a conductive part that are connected to each other. The assembly part is located at the first end of the housing, the mounting position is located at the assembly part, and the conductive part extends along the length of the housing toward the second end of the housing.

9. The foot bath device according to claim 4, characterized in that, The outer wall surface of the heat-conducting component is provided with a recess that matches the shape of the heating tube, and the heating tube is disposed in the recess; and / or, the outer wall surface of the heat-conducting component is provided with a plurality of heat dissipation ribs.

10. The foot bath device according to claim 7, characterized in that, The temperature sensing element includes a temperature controller and a thermal fuse. The mounting position includes a mounting groove and / or a mounting hole. The temperature controller is embedded in the mounting groove or the mounting hole, and the thermal fuse is embedded in the mounting groove or the mounting hole.

11. The foot bath device according to claim 10, characterized in that, The lead-out end has two parts, the heat-conducting element has four sides, the mounting groove includes a first groove and a second groove, the first groove and the second groove are respectively provided on the opposite first side and the second side of the heat-conducting element, the thermostat and the thermal fuse are respectively embedded in the first groove and the second groove; the opposite third side and the fourth side of the heat-conducting element are respectively provided with recesses adapted to the shape of the heating tube, the heating tube includes a straight first tube and a straight second tube connected to the two lead-out ends, the first tube and the second tube are respectively embedded in the two recesses.

12. The foot bath device according to claim 10, characterized in that, The heat-conducting component has an assembly portion of a preset length, and the mounting hole includes a first hole and a second hole. The assembly portion is provided with the first hole and the second hole. The temperature controller is disposed in the first hole, and at least a portion of the thermal fuse is disposed in the second hole.

13. The foot bath device according to claim 12, characterized in that, The heating element has two leads, and the heating element includes a first straight tube and a second straight tube connected to the two leads. The leads are exposed at the first end of the housing. The heat-conducting component includes an assembly part and a conductive part connected to each other. The assembly part is also located at the first end of the housing. The assembly part has two through holes that extend through its length. The conductive part extends along the length of the housing to the second end of the housing. Two recesses that are adapted to the shape of the heating element are spaced apart on the surface of the conductive part. The first straight tube and the second straight tube are respectively embedded in the two recesses. One end of the first straight tube and one end of the second straight tube respectively protrude from the through holes.

14. The foot bath device according to claim 1, characterized in that, The heating element is a spiral heating element, comprising a first section, a spiral section, and a second section. The lead-out end includes a first lead-out end and a second lead-out end. The first section and the second section are respectively connected to the first lead-out end and the second lead-out end. Both the first section and the second section extend linearly from the first end of the housing towards the second end of the housing. The spiral section connects the portion of the first section near the second end of the housing and the portion of the second section near the second end of the housing, respectively. Alternatively... The heating element includes a first tube segment, a bent tube segment, and a second tube segment. The lead-out end includes a first lead-out end and a second lead-out end. The first tube segment and the second tube segment are respectively connected to the first lead-out end and the second lead-out end. Both the first tube segment and the second tube segment extend in a straight line from the first end of the shell to the second end of the shell. The bent tube segment is respectively connected to the portion of the first tube segment near the second end of the shell and the portion of the second tube segment near the second end of the shell. The bent tube segment is composed of multiple straight tube segments bent and connected.

15. The foot bath device according to claim 1, characterized in that, The housing is a hollow tubular structure. The heating element includes a first heat pipe and a second heat pipe, which extend linearly along the length of the housing. The lead-out end includes a first lead-out end and a second lead-out end. The first heat pipe has a first lead-out end and a first tail end at its two ends, and the second heat pipe has a second lead-out end and a second tail end at its two ends. Both the first lead-out end and the second lead-out end are exposed at the first end of the housing. The first tail end and the second tail end are connected by a conductive element or the first tail end and the second tail end are connected to form a U-shaped structure.

16. The foot bath device according to any one of claims 1-15, characterized in that, The shell is a hollow tubular structure. The shell is compacted by a tube shrinking process to form the second thermally conductive insulating powder to form the second thermally conductive insulating component. The compaction density of the second thermally conductive insulating component is greater than the bulk density of the second thermally conductive insulating powder under normal conditions.

17. The foot bath device according to claim 16, characterized in that, The second thermally conductive insulating component is magnesium oxide powder, and its compacted density is 2.5–3.5 g / cm³. 3 .

18. The foot bath device according to claim 1, characterized in that, The shell is a hollow tubular structure. The shell is formed by compacting a second thermally conductive insulating powder using a tube-shrinking process to create the second thermally conductive insulating component. The heating element includes a first heat pipe and a second heat pipe. The lead-out ends include a first lead-out end and a second lead-out end. The first heat pipe has a first lead-out end and a first tail end at its two ends, and the second heat pipe has a second lead-out end and a second tail end at its two ends. The first heat pipe and the second heat pipe extend linearly from the first end of the shell along the length of the shell to the second end of the shell. Both the first lead-out end and the second lead-out end are exposed at the first end of the shell, and both the first tail end and the second tail end are exposed at the second end of the shell. The ends are connected by conductive components; a heat-conducting component is also provided inside the receiving cavity, the heat-conducting component having higher thermal conductivity than the second heat-conducting insulating component, the heat-conducting component being integrally formed with the heating tube during die casting; the heat-conducting component includes an assembly part, a conductive part, and a connecting part, the conductive part connecting the assembly part and the connecting part respectively, the assembly part being located at the first end of the housing and having a preset length, the assembly part having a mounting position, the mounting position including a first hole and a second hole, the temperature sensing component including a thermostat and a thermal fuse, the thermostat being disposed in the first hole, and at least a portion of the thermal fuse being disposed in the second hole; the assembly part also has two through holes, and the first heat tube is connected to the first lead-out. The end of the first heat pipe and the end of the second heat pipe connected to the second lead end are respectively inserted into the two through holes; the connecting part is provided at the second end of the housing, and the connecting part is also provided with two through holes, and the end of the first heat pipe connected to the first tail end and the end of the second heat pipe connected to the second tail end are respectively inserted into the two through holes; the conductive part has recesses on two opposite sides that match the shape of the heating element, the first heat pipe and the second heat pipe are respectively attached to the two recesses, and the second thermally conductive insulating member wraps the first heat pipe, the second heat pipe and the remaining outer wall surface of the conductive part; the conductive part extends along the length direction of the housing to the second end of the housing, and the surface of the conductive part is provided with It has multiple heat dissipation ribs; the two ends of the heat-conducting component are fitted with flexible sleeves, the flexible sleeves include a first flexible sleeve and a second flexible sleeve, the outer periphery of the assembly part is fitted with the first flexible sleeve, the first flexible sleeve includes a first plug, a first clearance part and a first sleeve part, the first sleeve part is closer to the end of the shell than the first plug, the first clearance part connects the first plug and the first sleeve part respectively, the first plug is fitted on the outer wall surface of the assembly part and includes a first retaining edge extending toward the central axis of the first flexible sleeve, the connection between the assembly part and the conductive part is provided with a first step, the first retaining edge is engaged with the end face of the first step, and the first clearance part is the thickness reduction area on the first flexible sleeve;The connecting portion is fitted with a second flexible sleeve, which includes a second plug, a second clearance portion, and a second fitting portion. The second clearance portion connects the second plug and the second fitting portion, respectively. The second fitting portion is closer to the end of the housing than the second plug. The second plug includes a second retaining edge that fits onto the outer wall surface of the connecting portion and extends toward the central axis of the second flexible sleeve. A second step is provided at the connection between the connecting portion and the conductive portion, and the second retaining edge is engaged with the end face of the second step. The second clearance portion is a thickness-reduced area on the second flexible sleeve.

19. The foot bath device according to claim 1, characterized in that, The foot bath device also includes a main body, a massage mechanism, and a circulating water path. The massage mechanism is located inside the foot bath cavity and / or at the bottom of the foot bath cavity. The foot bath cavity is formed inside the main body and is connected to the circulating water path. A frame is provided on the circulating water path, and a water cavity is formed inside the frame. The heating element is located inside the frame to heat the water flowing through the water cavity. Both ends of the heating element are sealed to the frame.

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