A heating tube extension type electric faucet

Abstract

The application discloses a heating pipe extension type electric water faucet, which comprises a shell assembly constituting an internal framework of the faucet, a circuit board arranged in the shell assembly, and a control valve for controlling fluid on-off, wherein the shell assembly comprises an extension part extending axially below a mounting table and a control part above the mounting table, and the extension part and the control part together define a first fluid channel and a second fluid channel extending axially and isolated from each other in the shell assembly; the first fluid channel contains an axially extending heating pipe; and the second fluid channel is connected to the first fluid channel by the control valve. Through systematic structural optimization, the integration of heat management, electrical connection, sealing and waterproof, and flexible wiring is realized in a small diameter shape.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, specifically to an electric water faucet with an extended heating element. Background Technology

[0002] Electric water faucets are widely used in kitchens, bathrooms, and other places due to their instant hot water and easy installation. Existing electric water faucets typically integrate the heating element, control circuit, and temperature control element into a single housing. However, with increasing user demands for more refined and miniaturized faucet designs, it is difficult to rationally arrange the heating element, water passage, control element, and electrical wiring while maintaining a small radial dimension. Current electric water faucets often use spiral-wound heating elements. While this design can ensure heating power within a limited space (e.g., utility model patent CN207298058U discloses a heating element that includes a conductive heating element...), this approach is problematic. The heating shell and the heating element disposed within the heating shell include a water flow tube and a spiral heating tube sleeved around the outer periphery of the water flow tube. The heating tube is used to conduct electricity with the contact assembly after the contact assembly is pushed to a preset position by the top plate, so as to heat the water flow in the water flow tube. It can be seen that it not only uses a spiral heating tube, but also needs to accommodate the water flow tube inside the heating tube. Its spiral structure occupies a large radial space. In order to leave space for the water flow tube inside the heating tube and to arrange the heating tube and multiple control elements in a concentrated manner, it also includes the electrical wiring harness of multiple control elements.

[0003] In particular, the temperature control switch and the thyristor are used for over-temperature protection. The temperature control switch is used for power regulation and heat dissipation of the heating plate. In the existing technology, the temperature control switch and the thyristor are often distributed in different positions of the faucet, and each requires an independent heat-conducting component to achieve heat exchange with the water flow. This distributed arrangement not only increases the number of parts and assembly complexity, but also further occupies internal space, which is not conducive to miniaturization design and makes it difficult to compress the radial dimension of the housing.

[0004] In addition, the electrical connections inside electric water faucets involve the convergence and lead-out of live wires, neutral wires, ground wires, and wires of multiple control components. In existing technologies, the wiring harnesses are arranged in a chaotic manner and lack standardized guidance and fixing structures, which not only affects assembly efficiency but also poses safety hazards. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide an electric water faucet with an extended heating element, which achieves integrated thermal management, electrical connection, waterproof sealing, and flexible wiring within a compact diameter through systematic structural optimization.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a heating element extended electric water faucet, comprising a shell assembly constituting the internal skeleton of the faucet, a circuit board disposed inside the shell assembly, and a control valve for controlling the flow of fluid. The shell assembly has at least an extension portion extending axially below the mounting surface and a control portion located above the mounting surface, and together define an axially extending and mutually isolated first fluid channel and second fluid channel inside the shell assembly. The first fluid channel contains an axially extending heating element, and the second fluid channel connects external fluid to the first fluid channel through the control valve.

[0007] Furthermore, the control unit forms an assembly area on one side and a wiring area on the opposite side. The control unit is also provided with a transition channel connecting the assembly area and the wiring area. The assembly area has a first fluid port and a second fluid port arranged adjacent to each other, as well as a heat conduction seat that densely covers the first fluid channel and the second fluid channel. The heat conduction seat is provided with a temperature control switch corresponding to the first fluid channel and a thyristor corresponding to the second fluid channel. The first fluid port is connected to the first fluid channel, and the second fluid port is connected to the second fluid channel. Furthermore, at least one wire harness channel is provided in the wiring area, and a wire harness groove extending axially between the control part and the connecting part. The wire harness groove communicates with the wire harness channel, and at least one of the upper connecting part of the heating tube and the heat conduction seat extends a grounding connector. The grounding connector extends in the transition channel and leads out a grounding bus. The grounding bus is led out to the wire harness groove through the wire harness channel.

[0008] Furthermore, the shell assembly includes a control shell fixedly connected to the upper end of the extension tube, and an end cap assembly fixedly connected to the lower end of the extension tube. The extension tube includes a control connector seat disposed above the mounting platform and a tube body portion located below the mounting platform. The tube body portion extends axially and matches the heating tube axially, and the wire harness groove connects to the control connector seat and extends axially on the tube body portion. The end cap assembly is configured to connect to an external water source and communicate with a second fluid channel.

[0009] Furthermore, the control housing also includes an axial base, the wiring area and the assembly area are disposed on opposite sides of the axial base, and the transition channel is adjacent to the common side of the axial base, the wiring area and the assembly area; The assembly area includes an assembly facade and an assembly plane recessed within the envelope contour of the faucet. The assembly plane connects the top of the assembly facade and the bottom of the axial base, and a first space is separated between the assembly facade and the inner boundary of the envelope contour of the faucet, and a second space is separated between the assembly plane and the axial base. The first fluid inlet and the second fluid inlet are arranged adjacent to each other on the assembly facade; the upper end of the heating tube extends out of the assembly plane; the circuit board is vertically arranged and covers the assembly facade and the top of the assembly plane and the axial base.

[0010] Furthermore, the upper end of the heating tube extends into the assembly area, the grounding connector is disposed at the upper end of the heating tube and extends into the transition channel; the heat conduction seat is provided with multiple bends, the ends of the bends constitute grounding connectors, a mounting base is provided in the transition channel, the grounding connector and the grounding connector are adjacent to each other and constrained to the mounting base by grounding bolts.

[0011] Furthermore, the lower end of the heating tube extends into the end cap assembly and is led out with a live wire branch. The extension tube is provided with an axially penetrating live wire channel. The bottom of the control connector is provided with an annular protrusion that abuts against the upper end of the mounting platform. The live wire channel passes through the annular protrusion. The live wire branch is connected to the circuit board through the live wire channel. The upper part of the temperature control switch is electrically connected to the circuit board. The lower part of the temperature control switch has a live wire bus, and the control connector has an annular groove corresponding to the assembly area and the wiring area. The annular groove is connected to the wire harness groove, and the live wire bus is located in the annular groove.

[0012] Furthermore, the assembly area is also provided with a press-fit cover, which is fixedly connected to the assembly surface and abuts against the side of the temperature control switch and the thyristor that is away from the first fluid channel and the second fluid channel. The press-fit cover is also provided with adjacent positioning grooves and channels. The lower part of the temperature control switch passes through the positioning groove, and the live wire branch is placed in the positioning groove. The press-fit cover is also provided with an operating port for controlling the temperature control switch reset.

[0013] Furthermore, the control valve includes at least an inlet and an outlet. The inlet is connected to a second fluid channel in any outlet mode of the control valve, and the outlet is connected to a first fluid channel. The first fluid channel is provided with an inlet pipe extending axially towards the bottom. The inlet pipe is connected to the outlet. The bottom of the second fluid channel is provided with an inlet support. The lower end of the inlet pipe is mounted on the inlet support. The inlet pipe is arranged parallel to the heating pipe.

[0014] Furthermore, the assembly facade is provided with a trigger connection seat erected on the assembly plane. The trigger connection seat is located at the intersection of the assembly plane and the assembly facade. The trigger connection seat is provided with a trigger element. The circuit board is provided with a micro switch opposite to the trigger element. The control valve is also provided with a control port that connects to the second fluid channel. The trigger connection seat is provided with a control channel that connects to the control port. The trigger element is configured to receive the incoming water flow so that the heating tube is energized.

[0015] Furthermore, the trigger connector is also provided with a mounting bracket that presses onto the trigger element, and the deformable part of the trigger element passes through the mounting bracket and is positioned opposite to the micro switch; The mounting bracket is spaced apart on the vertical surface between the trigger connector and the circuit board, and at least partially covers the upper end of the heating tube extending into the assembly area, and the mounting bracket also has a mounting base extending toward the transition channel.

[0016] Furthermore, a first wire harness channel and a second wire harness channel are provided in the wiring area. The upper end of the heating tube extends out of the assembly area and a neutral wire bus is led out. The grounding bus is placed in the first wire harness channel and the neutral wire bus is placed in the second wire harness channel. The wire harness groove defines the upper wire outlet above the mounting platform; The tube body is provided with a retaining ring assembly for abutting against the lower end face of the mounting platform. The retaining ring assembly is axially adjustable, and the upper end of the retaining ring assembly is provided with a lower cable outlet aligned with the wire harness groove.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects: The present invention uses an axially extended single straight tube heating tube to replace the traditional spiral coiled heating tube, which eliminates the inherent radial redundant space of the spiral structure. The heating tube is directly accommodated in the first fluid channel, and the first fluid channel and the second fluid channel are arranged parallel to each other along the axial direction and isolated from each other. The two share the same radial cross section of the extension tube, which is beneficial to compressing the radial space of the faucet. This invention uses a single heat conduction base to simultaneously cover the first fluid inlet where the heating element is located and the second fluid inlet through which the inlet water flows. This allows the temperature control switch and the thyristor to share the same heat-conducting component, eliminating the need for the temperature control switch and the thyristor to be arranged separately or to have their own independent heat-conducting components. Furthermore, the heat conduction base not only integrates the heat conduction of the integrated temperature control switch and the heat dissipation of the thyristor, but also extends a grounding connection piece. This piece, together with the grounding connection piece extending from the heating element, forms a grounding line, reducing the need for independent grounding components and further compressing the overall space occupied. The heating element, two fluid inlets, and multiple sets of control elements can be integrated within a small-diameter housing profile. In this invention, one side of the control section is designated as the assembly area, and the opposite side is designated as the wiring area, which are connected by a transition channel. Meanwhile, the assembly area adopts a relatively concave assembly facade and assembly plane, and the circuit board is vertically arranged and covered on the assembly facade, so that all control components are contained within the envelope contour of the control housing without adding extra radial dimensions. The wiring area utilizes the side unused space of the axial base to set up a narrow wire harness channel, so that the wire harness is arranged in a standardized manner, and the parallel arrangement of functional components and wiring is achieved within the limited radial space.

[0018] In summary, while ensuring that the heating power meets the usage requirements and that the control components are arranged completely and reliably, the radial dimension of the electric water faucet has been effectively reduced, achieving a small-diameter design for the overall structure. This saves space on the installation countertop, meets the needs of modern kitchens and bathrooms for small and exquisite bathroom products, and at the same time, the high degree of integration of each functional structure, fewer parts, and lower assembly difficulty also help control production and assembly costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the structure of the wire harness bus at the upper outlet of the present invention; Figure 4 This is a cross-sectional view of the first fluid channel and the second fluid channel of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point B in the middle; Figure 6 For the present invention Figure 4 Enlarged view of point C in the middle; Figure 7 This is a cross-sectional view of the first fluid channel and the water inlet pipe of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of point D in the middle; Figure 9 This is a schematic diagram of the control valve of the present invention; Figure 10 This is a cross-sectional view of the first fluid channel of the present invention at the water outlet component; Figure 11 This is a cross-sectional view of the tube body portion of the present invention; Figure 12 This is a cross-sectional view of the trigger element and grounding connection of the present invention; Figure 13 For the present invention Figure 12 Enlarged view at point E in the middle; Figure 14 This is a cross-sectional view of the temperature control switch and the thyristor in this invention; Figure 15 This is a structural diagram of the present invention after the extension tube has been removed; Figure 16 This is an exploded view of the assembly area of ​​the present invention; Figure 17 This is an exploded view of the assembly area of ​​the present invention from another angle; Figure 18 This is an exploded view of the upper sealing member of the present invention; Figure 19 This is an exploded view of the lower sealing member of the present invention; Figure 20 This is a front view of the shell assembly of the present invention in the assembly area; Figure 21 This is a front view of the shell assembly of the present invention in the transition channel; Figure 22 This is a front view of the shell assembly of the present invention in the wiring area; Figure 23 This is a cross-sectional view of the wire harness groove of the present invention; Figure 24 This is an exploded view of the outer casing and pressure line cover of the present invention; Figure 25 This is a schematic diagram of the control housing of the present invention; In the picture: 1. Shell assembly; 11. Control housing; 111. Axial base; 112. Lower base; 113. Upper base; 114. Assembly elevation; 115. Assembly plane; 116. Sealing groove; 12. Extension tube; 121. Control connector; 122. Tube body; 123. Annular boss; 124. External thread; 125. Live wire channel; 126. Annular groove; 13. End cap assembly; 131. Inlet end seat; 132. Sealing component; 133. Inlet port; 134. Lower operating area; 2. Circuit board; 21. Micro switch; 3. Control valve; 31. Inlet port; 32. Outlet port; 33. Control port; 34. Valve mounting base; 4. First fluid channel; 41. First fluid inlet; 5. Second fluid channel; 51. Second fluid inlet; 6. Heating element; 61. Upper connecting part; 62. Lower connecting part; 63. Sealing flange; 64. Heating sealing ring; 65. Annular protrusion; 7. Heat conduction base; 71. First heat conduction area; 72. Second heat conduction area; 73. Heat conduction part; 74. Receiving cavity; 75. Bending part; 76. Grounding connection piece; 77. Thermal control sealing ring; 771. First sealing part; 772. Second sealing part; 773. Third sealing part; 8. Temperature control switch; 81. Upper wiring part; 82. Lower wiring part; 83. Conductive sheet; 9. Thyristor; 10. Assembly area; 101. Trigger connector; 102. Trigger element; 103. Control channel; 104. Mounting bracket; 105. Mounting base; 140. Grounding connector; 141. Grounding bolt; 142. Grounding bus; 143. Neutral bus; 144. Live wire bus; 145. Live wire branch; 150. Wiring area; 151. First wire harness channel; 152. Second wire harness channel; 160. Transitional passage; 170. Cable harness groove; 171. Top cable outlet; 172. Cable clamping cover; 180. Retaining ring assembly; 181. Upper retaining ring; 182. Lower retaining seat; 183. Lower cable outlet; 184. First protrusion; 185. Second protrusion; 186. First wall; 187. Second wall; 188. Groove; 189. Internal thread; 190. Press-fit cover; 191. Positioning groove; 192. Channel; 193. Operating port; 194. Support leg; 200. Water inlet pipe; 210. Water inlet bracket; 220. Sealing component; 221. Spacer sealing part; 222. Positioning seat; 230. Water outlet components; 240. Exterior casing; 241. Clearance opening; 250. Mounting surface; 260. Wiring harness bus; Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be understood that although the terms upper, middle, lower, top, one end, etc., appear in this document to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish the elements from each other for ease of understanding, and are not used to define any directional or sequential restrictions.

[0022] like Figure 1-12 As shown, an electric water faucet with an extended heating element includes a shell assembly 1 that forms the internal skeleton of the faucet, a circuit board 2 disposed inside the shell assembly 1, and a control valve 3 for controlling the flow of fluid. The shell assembly 1 is provided with an outer shell 240, and a water outlet component 230 is provided on the top of the shell assembly 1. The shell assembly 1 contains a heating element 6, specifically a single axially extending long straight heating element 6, in order to reduce the radial dimension of the faucet and achieve a miniaturized design.

[0023] The housing assembly 1 has at least an axially extending extension portion below the mounting platform 250 and a control portion above the mounting platform 250. The extension portion and the control portion together define an axially extending and mutually isolated first fluid channel 4 and second fluid channel 5 inside the housing assembly 1. The first fluid channel 4 and the second fluid channel 5 are specifically arranged axially parallel inside the housing assembly 1. The first fluid channel 4 contains an axially extending heating tube 6 and is connected upward to the water outlet component 230. The second fluid channel 5 connects external fluid to the first fluid channel 4 through the control valve 3. That is, the first fluid channel 4 serves as the water outlet chamber and the second fluid channel 5 serves as the water inlet chamber. like Figure 12 and Figure 15 ,as well as Figures 20 to 22 As shown, the control part forms an assembly area 10 on one side and a wiring area 150 on the opposite side. The assembly area 10 is specifically a portion of the control part that is recessed relative to the envelope contour of the outer shell 240, while ensuring the occupancy of the internal first fluid channel 4 and the second fluid channel 5. The control section also includes a transition channel 160 connecting the assembly area 10 and the wiring area 150. The assembly area 10 has adjacently arranged first fluid inlets 41 and second fluid inlets 51, and a heat conduction seat 7 densely covering the first fluid channel 4 and the second fluid channel 5. The first fluid inlets 41 and the second fluid inlets 51 are both located on the assembly facade 114 of the assembly area 10 to avoid complex radial flow paths. Sealing is achieved through the heat conduction seat 7 and its thermal control sealing ring 64. Furthermore, the heat conduction seat 7 has a connection to the first fluid channel 41 and the second fluid channel 51. The temperature control switch 8 is provided corresponding to the fluid channel 4, and the thyristor 9 is provided corresponding to the second fluid channel 5. The first fluid port 41 is connected to the first fluid channel 4, and the second fluid port 51 is connected to the second fluid channel 5. Thanks to the axially adjacent arrangement of the first fluid channel 4 and the second fluid channel 5, the temperature control switch 8 and the thyristor 9 can be integrated synchronously through a single heat conduction seat 7 without excessively increasing the span size of the heat conduction seat 7. At the same time, the circuit board 2 is provided on the assembly area 10, so the temperature control switch 8 and the thyristor 9 can be conveniently electrically connected to the circuit board 2. The wiring area 150 is provided with at least one wire harness channel and a wire harness groove 170 extending axially between the control part and the connection part. The wire harness channel is used to plan the wire harness layout path within it, and the wire harness groove 170 connects to the wire harness channel. The wire harness groove 170 actually serves as a bus layout, where multiple wire harnesses converge to form a wire harness bus 260 and are led out from the wire harness groove 170. The wire harness groove 170 can extend axially to a part below the faucet mounting surface 250, so the bus wire harness can be led out on the mounting surface 250 or below the mounting surface 250.

[0024] At least one of the upper connecting portion 61 of the heating tube 6 and the heat conduction seat 7 extends a grounding connector 140. The grounding connector 140 extends within the transition channel 160 and has a grounding bus 142 leading out. The grounding bus 142 leads out to the wire harness groove 170 through the wire harness channel.

[0025] The leads of the control elements arranged in the assembly area 10 are led out to the wiring area 150 through the transition channel 160. Thanks to the arrangement of the heat conduction seat 7, which is preferably made of metal, such as stainless steel, the heat conduction seat 7 can extend to the transition channel 160 as a grounding member for the temperature control switch 8 and the silicon controlled rectifier 9. The upper end of the heating tube 6 also extends out of the assembly area 10 and is adjacent to the transition channel 160. Therefore, the grounding structure of the heating tube 6 and the heat conduction seat 7 can be led out synchronously in the transition channel 160. The grounding connector 140, as an intermediate connecting member of the grounding member, can be led out from the upper end of the heating tube 6 or from the heat conduction seat 7. In the following embodiment, the grounding connector 140 is fixed to the upper end of the heating tube 6 as an example.

[0026] However, it should be noted that the heating tube 6 used in this embodiment is a single straight tube with a large axial length, which effectively reduces the overall radial dimension of the faucet. However, due to the increase in axial length, the overall axial length of the faucet is too large. Therefore, the shell assembly is spliced ​​with split shell units to obtain a slender and split faucet. At the same time, the first fluid channel 4 and the second fluid channel 5 are arranged in an axially extended manner and parallel to the heating tube 6 to avoid complex water channels in the radial direction.

[0027] (Shell assembly 1 - Control section - Tube body section 122) Reference Figures 4 to 8 As shown, as a further embodiment of the shell assembly 1, the shell assembly 1 includes a control shell 11 fixedly connected to the upper end of the extension tube 12, and an end cap assembly 13 fixedly connected to the lower end of the extension tube 12. The control shell 11, the extension tube 12 and the end cap assembly 13 are fixedly connected in the axial direction. (End cap component) For the end cap assembly 13, the end cap assembly 13 is configured to connect to an external water source and to the second fluid channel 5. It is provided with a water inlet 133 so that the end cap assembly 13 serves as the water inlet of a faucet. External water flows through the end cap assembly 13 into the second fluid channel 5, and the second fluid channel 5 is connected upward to the control valve 3, and then connected to the first fluid channel 4 through the control valve 3. Furthermore, such as Figure 5 and Figure 8 As shown, the end cap assembly 13 includes a water inlet end seat 131 and a capping member 132 detachably disposed on the water inlet end seat 131. The water inlet end seat 131 is used to connect to the lower end of the extension tube 12, and the water inlet end seat 131 forms an interface for the first fluid channel 4 and the second fluid channel 5. A sealing member 220 is disposed on the water inlet end seat 131 and engages with the lower end of the extension tube 12 to space the first fluid channel 4 and the second fluid channel 5 at the bottom. Further reference Figure 15 , Figure 16 and Figure 19 As shown, a lower operating area 134 is provided on the water inlet end seat 131, spaced apart from the first fluid channel 4 and the second fluid channel 5. The lower end of the heating tube 6 serves as the lower connecting part 62, which extends out of the first fluid channel 4 and is placed in the lower operating area 134. The lower connecting part 62 is used to connect the live wire branch 145. The live wire branch 145 passes through the live wire channel 125 provided in the extension tube 12. The live wire channel 125 extends upward to the assembly area 10, so that the lower connecting part 62 is electrically connected to the circuit board 2. The cover member 132 covers the lower connecting piece, that is, after the operation of the lower connecting part 62 is completed, it can be sealed and protected by the cover member 132.

[0028] The lower operating area 134 is an independent open chamber that isolates the lower connecting piece at the lower end of the heating tube 6 from the fluid passage, facilitating wiring and debugging. The detachable cover component 132 allows wiring and maintenance without disassembling the entire end cover assembly 13 or extension tube 12. Thanks to the axially extending heating tube 6 and extension tube 12, the end cover assembly 13 is located below the table, making it more convenient for users to perform maintenance.

[0029] (Extension tube 12) For extension tube 12: As the core component of tube body 122, extension tube 12 extends axially and is integrally separated into a first fluid channel 4 and a second fluid channel 5 that are parallel to each other. No additional partitioning components are required. While simplifying the structure and reducing the number of parts, it also ensures the isolation and sealing of the two fluid channels, and avoids water flow cross-flow affecting water output efficiency and heating stability.

[0030] The extension tube 12 specifically includes a control connector 121 disposed above the mounting platform 250 and a tube body portion 122 located below the mounting platform 250. The upper end of the control connector 121 is fixedly connected to the control housing 11 and together they form the control part of the housing assembly 1. The lower end of the tube body portion 122 is fixedly connected to the end cap assembly 13 and together they form the extension part of the housing assembly 1.

[0031] The tube body 122 extends axially and matches the heating tube 6 axially. Its outer wall is a cylindrical structure of equal diameter, and the overall outer diameter is controlled within a preset size range. It can pass smoothly through the opening of the standard mounting table 250 to meet the space requirements of undermount installation. The top of the tube body 122 is provided with an external thread 124, which is used to cooperate with the retaining ring assembly 180 for fixing the faucet. The retaining ring assembly 180 moves axially relative to the tube body 122 by rotating the thread, and finally abuts against the lower end face of the mounting table 250 to complete the faucet assembly.

[0032] The control connector 121 serves as the bottom extension of the control housing 11, and the wiring harness groove 170 extends axially from the wiring area 150 of the control housing 11 to the control connector 121 and extends on the tube portion 122 to meet the requirement that the wiring harness bus 260 is led out above or below the mounting surface 250. Of course, the retaining ring assembly 180 is provided with a notch to allow the wiring harness bus 260 to pass.

[0033] The bottom of the control connection serves as the mounting surface, allowing most of the extension tube 12 to pass through the countertop hole and be hidden under the countertop. The control connection of the extension tube 12, as well as the control housing 11 and the water outlet component 230, are located on the countertop. This effectively utilizes the axial extension and radial reduction characteristics of the split-type faucet structure, hiding the long part and leaving only the most compact operating part on the countertop.

[0034] (Control housing 11) For the control housing 11, the aforementioned assembly area 10 and wiring area 150 are mainly formed on opposite sides of the control housing 11, while the transition channel 160 is provided in the upper region of the control housing 11. The control valve 3 is rotatably provided on the side opposite to the transition channel 160. The cross-sectional profile of the control housing 11 matches that of the extension tube 12. The extension tube 12 is used to accommodate the heating tube 6 and provide the axial portions of the first fluid channel 4 and the second fluid channel 5, while the control housing 11 is used to provide the top portions of the first fluid channel 4 and the second fluid channel 5.

[0035] The axial length of the heating tube 6 is adapted by a split shell assembly 1, which consists of an axially extending extension tube 12 and control shells 11 and end cap assemblies 13 located at both ends. Each shell can be manufactured independently and then assembled. Compared with the shell assembly 1 with an integrated structure, the split shell assembly adapts to the single axially extending heating tube 6, and the length of the extension tube 12 can be flexibly adjusted as needed to adapt to heating tubes 6 with different power or models. Among them, such as Figure 10 and Figure 18 As shown, the control housing 11 includes a lower base 112, an axial base 111, and an upper base 113 arranged sequentially from bottom to top in the axial direction. The lower base 112 is fixedly connected to the control connection P and connects the first fluid channel 4 and the second fluid channel 5. The axial base 111 is used to allow the first fluid channel 4 to extend upward, and the radial space occupied by the heating tube 6 ends at the axial base 111 because the upper end of the heating tube 6 extends into the assembly area 10 defined by the axial base 111. The upper base 113 is used to connect the water outlet component 230 and connects to a portion of the first fluid channel 4 within the axial base 111 for fluid output.

[0036] Therefore, the lower base 112 and the upper base 113 have an outer diameter that is basically the same as that of the control connection seat 121, while the axial base 111 only connects the upper base 113 and the lower base 112 in the axial direction. Thus, the axial base 111 only occupies a part of the axial projection, specifically a part adjacent to the boundary, thereby avoiding the assembly area 10. At the same time, the axial base 111 also serves as an extension of the first fluid channel 4.

[0037] Before further explaining the components of the first fluid channel 4 and the second fluid channel 5, the control valve 3 in the above embodiments is usually configured to rotate to adjust different modes. This is a well-known technique in the art and will not be described in detail here. The control valve 3 selects the hot water mode, cold water mode and shut-off mode of the faucet. The heating element 6 is not powered in the cold water mode, and the cold water is still output to the water outlet component 230 through the first fluid channel 4.

[0038] During operation, by turning the control valve 3 to the cold water mode, the control connection port 33 is disconnected, and the inlet connection port 31 and the outlet connection port 32 are connected; when the control valve 3 is turned to the hot water mode, the inlet connection port 31 is simultaneously connected to the control connection port 33 and the outlet connection port 32; when turned to the closed water mode, the inlet connection port 31 is disconnected.

[0039] Reference Figure 9The control valve 3 includes at least an inlet port 31 and an outlet port 32. The inlet port 31 is connected to the second fluid channel 5 in any water outlet mode of the control valve 3, and the outlet port 32 is connected to the first fluid channel 4. The control valve 3 also includes a control port 33, which is connected to the second fluid channel 5 and receives a trigger element 102. In hot water mode, the incoming water flows through the control port 33 and acts on the trigger element 102, thereby energizing the heating element 6. The purpose of this application is to achieve a smaller diameter faucet. The specific structure of the trigger element 102 will be explained in the following embodiments. In this embodiment, the trigger element 102 is a conventional component in an electric water faucet and is only used as one way to energize the heating element 6 and determine the hot water mode.

[0040] (First fluid channel 4, second fluid channel 5) Further reference Figures 4 to 8 As shown, the second fluid channel 5 extends upward from the water inlet 133 of the end cap assembly 13 to the water inlet 31 of the control valve 3. The end cap assembly 13, the pipe body 122 of the extension pipe 12, the control connector 121, and the lower base 112 of the control housing 11 all provide components of the second fluid channel 5. The water inlet 31 is a radial bend at the top of the second fluid channel 5, which only needs to connect to the control valve 3. Therefore, the water inlet 31 only needs to provide a small radial component.

[0041] Combination Figure 10 For the first fluid channel 4, which extends upward from the bottom of the end cap assembly 13, it can be considered that the part of the tube body portion 122 that is not the second fluid channel 5 is the first fluid channel 4. When it extends to the control housing 11, the cross-section of the first fluid channel 4 can be enlarged if conditions permit. Specifically, it extends from the control connector 121 type to the lower base 112 of the control housing 11. At this time, the first fluid channel 4 is further extended axially by the axial base 111. Therefore, the cross-sectional area of ​​the first fluid channel 4 is compressed in the axial base 111, and the heating tube 6 is parallel to the part of the non-axial base 111, so that the upper end of the heating tube 6 extends out in the assembly area 10. Then the first fluid channel 4 is extended through the upper base 113, which is radially connected through the junction of the axial base 111, and outputs upward to the water outlet component 230 in the direction of the central axis of the control housing 11.

[0042] The single axially extending heating tube 6, as well as the axially extending first fluid channel and second fluid channel, are all arranged in a spatial arrangement with parallel axes. The first fluid channel only needs to have an inner diameter larger than the heating tube 6, while the second fluid channel, as the inlet for external water flow, can be directly formed on the side wall of the extension tube 12. Its diameter is easy to control, thereby ensuring the heating power of the heating tube 6 while reducing the radial dimension of the faucet and saving countertop space. At the same time, the axial base 111 meets the arrangement requirements of the mounting area 10 on the control housing 11, and meets the integration of multiple control elements inside the faucet.

[0043] As a further implementation of the external water flow entering the first fluid channel 4, such as Figure 7 and Figure 8 As shown, the first fluid channel 4 is provided with an inlet pipe 200 extending axially towards the bottom. The inlet pipe 200 is connected to the outlet port 32. The bottom of the second fluid channel 5 is provided with an inlet support 210. The lower end of the inlet pipe 200 is mounted on the inlet support 210. The inlet pipe 200 is set parallel to the heating pipe 6. That is, in any water outlet mode of the control valve 3, the inlet pipe 200 is connected to the second fluid channel 5. The inlet pipe 200 is parallel to the axis of the heating pipe 6. The inlet pipe 200 is an independent pipe fitting. It is specifically connected to the part of the control housing 11 corresponding to the control valve 3 and extends downward to the bottom of the first fluid channel 4.

[0044] from Figure 15 As can be seen, the water inlet bracket 210 is not a complete circle. It only provides support for the bottom of the water inlet pipe 200. The water output from the fixed water inlet pipe 200 can still flow into the bottom of the first fluid channel 4 through the spaced openings of the water inlet bracket 210.

[0045] In this embodiment, the water inlet pipe 200 is arranged parallel to the axis of the heating pipe 6, making full use of the axial space in the first fluid channel 4 without adding extra radial dimensions. Cold water enters from the bottom, rises naturally after being heated, forming good thermal convection, which improves heating efficiency and the uniformity of the outlet water temperature.

[0046] Specifically, such as Figure 11 As shown, the water inlet pipe 200 occupies the internal space of the first fluid channel 4, but does not occupy the radial dimension of the faucet, so that the water inlet pipe 200 is kept within the predetermined outline planned in the first fluid channel 4 and the second fluid channel 5.

[0047] (Sealing member 220 of shell assembly 1) In the above embodiment, for the split shell assembly 1, a sealing member 220 is abutted between the control shell 11 and the extension tube 12, and between the extension tube 12 and the end cap assembly 13. The sealing member 220 constructs at least two mutually isolated sealing areas on the cross section of the shell assembly 1; one sealing area surrounds the periphery of the through interface of the first fluid channel 4, and the other sealing area surrounds the periphery of the through interface of the second fluid channel 5, so that the first fluid channel 4 and the second fluid channel 5 at the corresponding ends of the extension tube 12 can be sealed and isolated by a single sealing member 220.

[0048] Further reference Figures 18 to 19 As a further embodiment of the sealing member 220, the sealing member 220 is integrally formed. Specifically, the sealing member 220 is an irregularly shaped annular member with a certain amount of extension in the axial direction, thereby ensuring a tight assembly gap under the assembly and fastening action of two adjacent housing units.

[0049] The sealing member 220 matches the cross-sectional profile of the first fluid channel 4 and the second fluid channel 5 in which it is located. A spacer sealing part 221 is connected in the annular profile of the sealing member 220. The spacer sealing part 221 has the same cross-sectional size as the body of the sealing member 220. The spacer sealing part 221 divides the sealing member 220 into the two sealing areas mentioned above.

[0050] Preferably, the outline of the sealing member 220 avoids the fixed connection position between the control housing 11 and the extension tube 12, and between the extension tube 12 and the end cap assembly 13. For example, if the control housing 11 and the extension tube 12 are fixedly connected by bolts, then the outline of the sealing member 220 avoids the bolts.

[0051] like Figures 5 to 6 As shown, the sealing member 220 needs to withstand axial assembly pressure and long-term water pressure pulsation. It is necessary to ensure the relative position of the sealing member 220 on the housing unit to avoid displacement or extrusion. The extension tube 12 is provided with a positioning seat 222 that matches the contour of the sealing member 220 between it and the axially adjacent control housing 11 and end cap assembly 13. The positioning seat 222 axially accommodates the sealing member 220 in at least part, and the sealing member 220 is held in a deformed posture.

[0052] That is, the sealing member 220 can be pre-positioned on one of the opposing positioning seats 222. As the shell assembly 1 is assembled, the sealing member 220 is squeezed and deformed by the contours of the two opposing positioning seats 222, thereby fully sealing the assembly gap between them and improving the sealing between the through interface of the adjacent first fluid channel 4 and the second fluid channel 5.

[0053] It should be noted that the bolt fixing positions at both ends of the extension tube 12 are different, so the avoidance positions of the upper and lower sealing components 220 relative to the bolts are different, resulting in different irregular contours of the two sealing components 220. This can effectively prevent the upper and lower sealing components 220 from being mixed up or installed backwards during assembly, reducing the probability of assembly errors.

[0054] In addition, the one-piece molded sealing component 220 structure reduces the number of seals. There is no need to set separate seals for the two fluid channels. The two sealing areas can be constructed simultaneously with a single component, which reduces the cost of parts and further compresses the axial space occupied at the connection of the shell assembly 1, which is conducive to the miniaturization design of the overall structure.

[0055] (Sealing of heating element 6) Further integration Figures 5 to 6 As shown, in a further embodiment of the end sealing connection of the heating tube 6, the upper end of the heating tube 6 extends upward from the extension tube 12 to the corresponding assembly area 10, and the lower end of the heating tube 6 extends downward from the extension tube 12 to the outside of the corresponding end cap assembly 13. The extended part of the heating tube 6 is the part to be sealed, and the heating sealing ring 64 is disposed in the part located inside the shell assembly 1, thereby achieving the sealing between the heating tube 6 and the corresponding shell unit.

[0056] Specifically, heating pipe 6 is provided with heating sealing rings 64 at both ends. A sealing seat is provided between the control housing 11 and the end cap assembly 13 along the axial direction, abutting against one end of the heating sealing ring 64. A sealing flange 63 is provided on the heating pipe 6, abutting against the other end of the heating sealing ring 64 and constraining the axial position of the heating pipe 6 between the control housing 11 and the end cap assembly 13. The sealing flange 63 is set away from the sealing seat. The sealing flange 63 can be fixed to the heating pipe 6 by welding or other means. Through the above improvements, the axial positioning and end sealing problems of the long heating pipe 6 in the split housing are solved, and it is prevented from moving under the impact of water flow.

[0057] In this embodiment, the heating sealing ring 64, the sealing seat, and the sealing flange 63 cooperate to form an axial clamp on the heating sealing ring 64, which is axially compressed, achieving a reliable end seal. At the same time, the axial limiting effect of the sealing flange 63 and the sealing seat fixes the heating tube 6 between the control housing 11 and the end cap assembly 13, preventing it from moving axially. Through the coordinated constraint at both ends of the split structure, a stable constraint on the entire long heating tube 6 is achieved.

[0058] Specifically, the heating sealing ring 64 abuts against the inner wall of the sealing seat in the radial direction. At least two annular protrusions 65 are provided on the circumference of the heating sealing ring 64, and the two adjacent annular protrusions 65 are spaced apart in the axial direction of the heating sealing ring 64, thereby ensuring that the heating sealing ring 64 and the sealing seat are sealed on the radial side. This allows the heating sealing ring 64 to bear both radial and axial constraints at the same time, resulting in a better sealing effect.

[0059] Preferably, the sealing flange 63 is placed inside the sealing seat, and the sealing seat is preferably arranged in a concave position in the corresponding upper and lower housing units, which optimizes the spatial fit between the heating sealing ring 64, the sealing flange 63 and the sealing seat, making them more compact and reliable.

[0060] The sealing seat has a through-hole at its axial end, which is used for the end of the heating tube 6 to extend out and pass through the sealing seat. At this time, the end of the heating tube 6 extends out of the corresponding housing unit.

[0061] (Introduction of the assembly area 10 of the control housing 11) In the above embodiments, since a single straight heating tube 6 is used to achieve a smaller diameter, its radial dimension is also compressed accordingly. However, the internal assembly space of the shell assembly 1 is also more limited. The control elements of an electric water faucet typically include a temperature control switch 8 and a silicon controlled rectifier 9, requiring highly compact integrated control elements inside the shell assembly 1.

[0062] Reference Figure 10 and Figure 18 As shown, specifically, the axial base 111 of the control housing 11 only needs to provide the water outlet section of the first fluid channel 4. Therefore, its occupied area on the cross section can be appropriately compressed, thereby releasing more assembly space to meet the arrangement requirements of the control elements. The wiring area 150 and the assembly area 10 are set on opposite sides of the axial base 111. Since the wiring area 150 only needs to accommodate small-diameter wire harnesses, it is preferably set as a narrow channel 192 that matches the outer diameter of the wire harness, which will not occupy too much radial space. The assembly area 10 is located in the free area that the axial base 111 avoids. Its outline is roughly adapted to the stacked shape of the control elements. All control elements are accommodated in the space defined by the control housing 11, without needing to protrude outwards to occupy radial space. While realizing the integration of multiple control elements, the overall small-diameter design of the electric water faucet is still maintained.

[0063] Further integration Figures 20 to 22As shown, the transition channel 160 is adjacent to the common side of the axial base 111, the wiring area 150 and the assembly area 10. The control valve 3 is located on the opposite side of the transition channel 160. That is, in the axial projection direction, the line connecting the transition channel 160 and the control valve 3 is perpendicular to the line connecting the wiring area 150 and the assembly area 10. Since the first fluid channel 4 and the second fluid channel 5 are both axially extended, with their main parts extending to the lower base 112, the above spatial arrangement will not interfere with the fluid flow of the first fluid channel 4 and the second fluid channel 5. On the contrary, it can make full use of the idle space in different directions defined by the axial base 111 inside the control housing 11, realize the staggered arrangement of each functional area, and reserve sufficient arrangement space for control elements and wiring without expanding the radial profile size.

[0064] The assembly area 10 includes an assembly facade 114 and an assembly plane 115 recessed relative to the envelope contour of the faucet. The assembly plane 115 connects the top of the assembly facade 114 and the bottom of the axial base 111. Specifically, the assembly plane 115 is formed on the top surface of the lower base 112, and the assembly facade 114 is formed on the side of the lower base 112 facing the envelope contour. This creates a first space between the assembly facade 114 and the inner boundary of the envelope contour of the faucet, and a second space between the assembly plane 115 and the axial base 111. The top of the second space is defined by the bottom of the upper base 113. The first fluid inlet 41 and the second fluid inlet 51 are arranged adjacent to each other on the mounting surface 114. The upper end of the heating tube 6 extends out of the mounting plane 115. The circuit board 2 is vertically arranged and covers the mounting surface 114 and the top of the mounting plane 115 and the axial base 111. Thus, the mounting surface 114 provides a flat and stable mounting reference for the circuit board 2, the heat conduction seat 7, the temperature control switch 8, and the thyristor 9, realizing a compact spatial layout in the mounting area 10. The circuit board 2 is placed vertically above the temperature control switch 8 and the thyristor 9, making full use of the vertical space of the mounting area 10 and reducing the horizontal area occupied. It is suitable for miniaturized faucets that use long straight heating tubes 6. The radial dimension of its control housing 11 is limited. At the same time, the outer shell 240 only needs to cover the outer side of the mounting area 10 without adding extra radial thickness, maintaining the small diameter characteristics of the overall outline.

[0065] In this embodiment, the circuit board 2 is fixed on the outermost side of the assembly facade 114, maintaining a preset installation distance from the heat conduction seat 7, the temperature control switch 8, and the thyristor 9. Thanks to the vertical arrangement of the circuit board 2, it can not only directly display CNC data on the outer shell 240, but the temperature control switch 8 and the thyristor 9 can also be directly connected to the bottom of the circuit board 2 without additional wiring, simplifying the assembly process and reducing the space occupied by wiring.

[0066] On the assembly plane 115, the upper end of the heating tube 6 extends out of the assembly plane 115, thereby providing operating space for wiring at the upper end of the heating tube 6.

[0067] (Heat conduction seat 7 - Temperature control - SCR 9) Reference Figure 20 and Figure 21 On the assembly facade 114, the heat conduction seat 7 is a flat plate-shaped component to improve the heat conduction efficiency on both the hot and cold sides. For example, the wall thickness of the heat conduction seat 7 is preferably 0.8mm. The heat conduction seat 7 is also vertically arranged like the circuit board 2. The heat conduction seat 7 is further closer to the interior of the assembly area 10 than the circuit board 2. Its purpose is to provide space for the arrangement of the temperature control switch 8 and the thyristor 9. On this basis, the thyristor 9 and the temperature control switch 8 are also configured vertically. The axis of the temperature control switch 8 is perpendicular to the first fluid channel 4. Specifically, its two wiring parts are arranged vertically opposite each other. The thyristor 9 is a cuboid block with its pins also extending vertically. Both can be directly inserted and soldered to the circuit board 2 without the need for additional adapter wires, reducing wiring procedures and additional space occupation.

[0068] The heat conduction seat 7 basically covers the surface of the lower base 112. The outer side of the heat conduction seat 7 corresponds to the first fluid inlet 41 and the temperature control switch 8, and the second fluid inlet 51 and the thyristor 9, respectively. The heating tube 6 is located within the axial projection range of the first fluid inlet 41, so that the temperature control switch 8 can directly obtain the temperature of the water flow in the first fluid channel 4, and the thyristor 9 can also dissipate heat with the help of the low temperature water inlet in the second fluid channel 5. Compared with the traditional independent heat dissipation arrangement, it not only saves the additional heat dissipation components, but also improves the temperature control accuracy and heat dissipation effect, and further compresses the assembly space.

[0069] Further reference Figures 14 to 18 As shown, in this embodiment, the heat conduction base 7 serves as both the heat conduction component and the mounting base for the temperature control switch 8 and the silicon controlled rectifier (SCR) 9. The heat conduction base 7 has a first heat conduction area 71 and a second heat conduction area 72 spaced apart. The first heat conduction area 71 corresponds to the first fluid inlet 41, and the second heat conduction area 72 corresponds to the second fluid inlet 51. The temperature control switch 8 is mounted on the first heat conduction area 71, and the SCR 9 is mounted on the second heat conduction area 72. The temperature control switch 8 can achieve a sufficiently fast temperature response without needing to penetrate the fluid, thus avoiding the risk of leakage caused by the contact of the energized parts of the temperature control switch 8 with the fluid. The heat generated by the SCR 9 during operation is also quickly transferred through the wall of the heat conduction base 7 in the second heat conduction area 72 to the ambient temperature water flowing in the second fluid channel 5. The high specific heat capacity of the water enables efficient heat absorption and dissipation, resulting in higher heat dissipation efficiency compared to traditional solutions with independently configured heat sinks, and also saving the space occupied by independent heat sinks.

[0070] The thin-walled heat conduction seat 7 efficiently conducts heat from the first fluid channel 4 to the temperature control switch 8, while simultaneously conducting heat generated by the silicon controlled rectifier 9 to the second fluid channel 5. In addition, the metal heat conduction plate is easy to process and can be made into the required shape through processes such as stamping and bending, resulting in low manufacturing costs.

[0071] It should be noted that the SCR 9 is used to provide heat dissipation for the circuit board 2. Although the second heat-conducting area 72 is configured to correspond to the cold end of the SCR 9, the heat from the SCR 9 will be carried away by the inlet water flow in the first fluid channel 4, thus balancing the temperature of the second heat-conducting area 72. It will not cause the temperature of the second heat conduction area 72 to rise abnormally. Since the water in the second fluid channel 5 is always in a flowing state, the water temperature is far lower than the working tolerance temperature of the thyristor 9, and the water flow can continuously remove the heat generated by the working of the thyristor 9. The small amount of thermal interference from the high temperature water flow in the first fluid channel 4 can be completely offset by the flowing water and will not affect the normal operation of the thyristor 9.

[0072] like Figure 14 As shown, as a further embodiment of the arrangement of the heat conduction seat 7 on the shell assembly 1, a thermal control sealing ring 77 is provided between the heat conduction seat 7 and the shell assembly 1. The thermal control sealing ring 77 surrounds the periphery of the first fluid inlet 41 and the second fluid inlet 51 to seal the gap between the heat conduction seat 7 and the assembly surface 114 of the shell assembly 1. The thermal control sealing ring 77 is sandwiched between the heat conduction seat 7 and the open end face of the assembly surface 114. It can be made of heat-resistant rubber material that is integrally vulcanized. The whole ring surrounds the outer periphery of the first fluid inlet 41 and the second fluid inlet 51. The open end face of the assembly area 10 on the shell assembly 1 is pre-opened with a sealing groove 116 that matches the contour of the thermal control sealing ring 77. During assembly, it is only necessary to insert the thermal control sealing ring 77 into the sealing groove 116 and then align and press the heat conduction seat 7 to complete the sealing of the two inlets. It is not necessary to install two independent thermal control sealing rings 77 separately, which reduces the assembly steps and also reduces the failure probability caused by multiple seals.

[0073] The thermal control sealing ring 77 includes a first sealing portion 771 corresponding to the first fluid inlet 41 and a second sealing portion 772 corresponding to the second fluid inlet 51. It is located at the intersection of the first sealing portion 771 and the second sealing portion 772, and forms a third sealing portion 773 that divides the first fluid inlet 41 and the second fluid inlet 51.

[0074] like Figure 18As shown, the heat conduction seat 7 has a heat conduction part 73 inserted into the first fluid channel 4. The heat conduction part 73 is close to or abuts against the heating tube 6. Preferably, the heat conduction part 73 extends directly into and abuts against the heating tube 6, so that the heat generated by the heating tube 6 can be transferred to the heat conduction seat 7 through the shortest path and then sensed by the temperature control switch 8. Compared with the indirect temperature measurement method through the tube wall or channel wall, this design that is directly close to the heat source greatly improves the temperature measurement response speed, enabling the temperature control switch 8 to detect water temperature changes more promptly and improving the reliability of over-temperature protection. At the same time, the heat conduction part 73 is placed inside the first fluid channel 4, without occupying additional space in the assembly area 10, which is beneficial for the miniaturization of the control housing 11.

[0075] To further meet the demand for smaller diameter faucets, the heat conduction part 73 is recessed on the surface of the heat conduction seat 7. This recessed part extends into the first fluid channel 4 and abuts against the surface of the heating tube 6. Simultaneously, the temperature control switch 8 is placed inside the heat conduction part 73, so that the temperature sensing part of the temperature control switch 8 enters at least partially into the first fluid channel 4 through the first fluid inlet 41 and the heat conduction part 73, while the heat conduction seat 7 remains sealed. This results in a larger and tighter contact area between the temperature control switch 8 and the heat conduction part 73, leading to higher heat conduction efficiency. At the same time, the recessed structure provides a natural positioning and limiting function for the temperature control switch 8, enabling accurate positioning of the temperature control switch 8 without the need for additional fixing brackets, simplifying the assembly process. For the temperature control switch 8, this arrangement provides a portion of the assembly space for the first fluid channel 4, thereby reducing the space occupied by the temperature control switch 8 in the assembly area 10, making the space more compact.

[0076] (Pressure cap 190) like Figures 15 to 17 As shown, as a further embodiment of assembling the temperature control switch 8 and the thyristor 9 in the housing assembly 1, a press-fit cover 190 is also provided on the assembly area 10. The press-fit cover 190 is fixedly connected to the assembly surface 114 and abuts against the side of the temperature control switch 8 and the thyristor 9 away from the first fluid channel 4 and the second fluid channel 5. That is, the press-fit cover 190 abuts against the temperature control switch 8 and the thyristor 9 from the surface of the assembly area 10, thereby pressing them tightly onto the heat conduction seat 7, ensuring good thermal contact between the temperature control switch 8 and the thyristor 9 and the heat conduction seat 7, and avoiding poor contact caused by vibration or thermal expansion and contraction.

[0077] like Figure 20As shown, as a further improvement to the press-fit cover 190, one of the wiring terminals of the temperature control switch 8 is directly connected to the upper circuit board 2 via the conductive sheet 83, while the other wiring terminal passes through the press-fit cover 190 and extends out of the press-fit cover 190. The two wiring terminals are arranged opposite each other in vertical space, and the press-fit cover 190 has a support portion 194 extending toward the assembly area 10. The support portion 194 is mounted on the bottom of the assembly space, specifically on the step portion of the housing assembly 1 corresponding to the bottom of the assembly space, thereby further reducing the space occupied by the press-fit cover 190 in radial space.

[0078] Simultaneously, the press-fit cover 190 also has a positioning groove 191 that matches the contour of the wiring part of the temperature control switch 8. That is, during assembly, the lower wiring part 82 of the temperature control switch 8 is inserted into the positioning groove 191, thereby further improving the stability of the temperature control switch 8 on the housing assembly 1. The wiring part is used to lead out the live wire bus 144.

[0079] Furthermore, the bottom of the heating tube 6 has a fire wire branch 145 that extends upward from the bottom of the extension tube 12 and connects to the circuit board 2. The press-fit cover 190 has a groove 192 that matches the fire wire branch 145 so that the fire wire branch 145 can be placed therein, reducing the radial space occupied by the fire wire branch 145 in the assembly space, while protecting the fire wire bus 144.

[0080] In some other embodiments, the press-fit cover 190 is also provided with an operation port 193 for controlling the temperature control switch 8 to reset, and the operation port 193 is also connected to the surface of the outer casing 240 so that the user can operate the temperature control switch 8.

[0081] In this embodiment, a single press-fit cover 190 simultaneously achieves the functions of pressing and fixing the temperature control switch 8 and the silicon controlled rectifier 9, electrical insulation with the outer shell 240, and positioning of the wiring harness. This eliminates the hassle of setting up multiple independent fixing components, further reduces assembly steps, and also eliminates the space occupied by additional insulating lining plates, compressing the overall volume of the assembly area 10. This adapts to the overall design requirements of miniaturization and achieves reliable installation and stable operation of the control components within a limited space.

[0082] (Trigger connector 101) Further reference Figure 16 and Figure 17 ,as well as Figure 25As shown, in this embodiment, a trigger connection seat 101 is provided on the assembly facade 114 and erected on the assembly plane 115. A trigger element 102 is provided inside the trigger connection seat 101. A micro switch 21 is provided on the circuit board 2 opposite to the trigger element 102. A control channel 103 is provided on the trigger connection seat 101 and connected to the control communication port 33 of the control valve 3. The trigger element 102 is configured to receive the incoming water flow so that the heating tube 6 is energized. The trigger element 102 is a silicone diaphragm. When the water pressure in the second fluid channel 5 reaches the expected value, the trigger element 102 deforms and pushes the contacts of the micro switch 21 to close, and the heating tube 6 is energized and starts heating. When the water pressure drops below the expected value, the trigger element 102 resets, the micro switch 21 opens, and the heating tube 6 is de-energized.

[0083] Specifically, the trigger connector 101 is located at the intersection of the assembly plane 115 and the assembly elevation 114. The trigger connector 101 forms an extension of the assembly elevation 114 in the second space, and is arranged opposite to the plane of the circuit board 2. That is, the circuit board 2 is also covered on the trigger connector 101. The assembly plane 115 is provided with a valve mounting seat 34 perpendicular to the trigger connector 101. The three communication ports of the control valve 3 are all arranged on the valve mounting seat 34. From the vertical projection direction, the axial base 111, the trigger connector 101 and the valve mounting seat 34 together form a concave structure on the assembly plane 115. The upper end of the heating tube 6 and the grounding connector 140 on it can be arranged from the rest of the assembly plane 115. The projection of this part also coincides with the transition channel 160. The grounding bus 142 can be extended upward from the transition channel 160 to realize the spatial mismatch of different functional components, avoid the increase in radial dimension caused by the stacking of components in the same area, and further maintain the overall small diameter characteristics of the control housing 11.

[0084] Specifically, the trigger connector 101 is also provided with a mounting bracket 104 pressed onto the trigger element 102. The mounting bracket 104 matches the surface contour of the trigger connector 101. The deformable part of the trigger element 102 passes through the mounting bracket 104 and is positioned opposite to the micro switch 21. The mounting bracket 104 is spaced apart on the vertical surface between the trigger connector 101 and the circuit board 2. The mounting bracket 104 also has a mounting base 105 extending toward the transition channel 160. The mounting base 105 serves as the fixed position of the grounding connector 140. The grounding connector 140 can be stably fixed here without occupying additional space in other areas, further improving space utilization.

[0085] In this embodiment, the staggered arrangement formed by the trigger connector 101 and the valve mounting seat 34 not only meets the functional requirements of water flow trigger control, but also integrates multiple related components such as the control valve 3, trigger element 102, and micro switch 21 into an adjacent limited space. The signal transmission path between components is shorter, and no additional connection structure is required, which further simplifies the overall assembly and is also compatible with the structural design requirements of miniaturized electric water faucets.

[0086] (Transition Channel 160) like Figure 12 and Figure 13 ,as well as Figures 20 to 24 As shown, as a further embodiment of the grounding connector 140, the grounding connector 140 is disposed at the upper end of the heating tube 6 and extends into the transition channel 160. The grounding connector 140 may be in the form of a clamp, which is clamped onto the columnar portion of the upper connecting part 61 of the heating tube 6. Through holes are provided on the two free ends of the grounding connector 140 for the grounding bolt 141 to pass through and fix it to the mounting base 105. Thus, the grounding structure of each control element can enter into the two free ends of the grounding connector 140, or be passed through by the grounding bolt 141, so that the grounding structure of each control element is constrained to the grounding connector 140 by the grounding bolt 141. At the same time, the grounding bus 142 is connected through a terminal with a through hole, specifically sleeved on the grounding bolt 141, so that it is fastened together with each grounding structure to ensure the reliability of the electrical conduction of the grounding.

[0087] In the above embodiments, the heat conduction base 7 provides a grounding foundation for the temperature control switch 8 and the silicon controlled rectifier 9, as well as the circuit board 2 electrically connected to the silicon controlled rectifier 9 and the temperature control switch 8. It eliminates the need to set up separate grounding structures on the temperature control switch 8 and the silicon controlled rectifier 9, thus achieving indirect grounding of these two components. The heat conduction base 7 not only plays the role of heat dissipation and temperature conduction, but also acts as a grounding bridge, realizing the reusability of the components. At the same time, the circuit board 2 is also indirectly grounded through the electrical connection of the silicon controlled rectifier 9, eliminating the need to set up a separate grounding line for the circuit board 2.

[0088] The heat conduction base 7 has multiple bends 75, the ends of which form grounding connection pieces 76. The grounding connection piece 140 is adjacent to the grounding connection piece 76 and is constrained to the mounting base 105 by grounding bolts 141. The grounding of the heating tube 6, the heat conduction base 7, the temperature control switch 8, and the thyristor 9 are concentrated in the same position. This compact layout realizes the grounding convergence of all control components in a limited assembly space. The grounding paths of all circuit boards 2, temperature control switch 8, and thyristor 9 that need to be grounded are finally converged to a single-point grounding bus 142. Compared with the design of each control component in a traditional electric water faucet having an independent grounding wire, this embodiment greatly reduces the amount of grounding wire used, avoids the occupation of assembly space by multiple grounding wires crossing and winding, reduces the probability of grounding faults caused by wire wear and loosening, simplifies the assembly process, and improves assembly efficiency.

[0089] Meanwhile, all grounding elements are uniformly connected to the same grounding point, which improves the electrical safety performance of the electric water faucet. The grounding structure is reused by controlling the existing components on the housing 11: the heat conduction seat 7 simultaneously undertakes the functions of heat dissipation and grounding, the mounting bracket 104 of the trigger element 102 integrates the mounting base 105 of the grounding connector 140, and the grounding connector 140 is fixed by relying on the upper connection part 61 of the heating tube 6. There is no need to add a large number of independent components, nor will it increase the overall size of the electric water faucet. It meets the requirements of miniaturization and compactness of the current instant electric water faucet.

[0090] Specifically, the bending portion 75 is positioned with the contour of the assembly area 10. The grounding connection piece 76 extends from the side of the heat conduction seat 7. The bending portion 75 is adapted to and engages with the contour structure of the inner wall of the assembly area 10, enabling pre-positioning before assembly. The bending portion 75 allows the grounding connection piece 76 to bypass other components or structural obstacles within the assembly area 10 and extend to the grounding connector 140 via the optimal path. Furthermore, the end of the grounding connection piece 76 is also provided with a through hole for the grounding bolt 141 to pass through and fasten it to the mounting base 105. At the same time, the bending portion 75 and the contour of the assembly area 10 form a positioning fit, enabling the grounding connection piece 76 to quickly find the correct position and orientation during assembly, improving assembly efficiency and preventing poor grounding due to installation deviation.

[0091] (Cable routing area 150) from Figure 22 As can be seen, the wiring area 150 is provided with a first wire harness channel 151 and a second wire harness channel 152. The upper end of the heating tube 6 extends out of the assembly area 10 and leads out a neutral wire bus 143. The grounding bus 142 is placed in the first wire harness channel 151, and the neutral wire bus 143 is placed in the second wire harness channel 152. Adjacent wire harness channels are spaced apart by structural ribs that form on the wiring area 150.

[0092] Furthermore, the aforementioned wire harness channels all include an arc-shaped extension portion, which is used for the transition connection of the wire harness leading out in the assembly area 10 to avoid excessive bending of the wire harness. It also includes a vertical extension portion connected to the bottom of the arc-shaped extension portion. The vertical extension portion extends downward along the axial direction of the control housing 11, and has an outlet at its end for the wire harness to pass through. The ground bus 142 and the neutral bus 143 descend along the vertical extension portion to the outlet and converge in the wire harness groove 170.

[0093] Further integration Figures 20 to 22 Specifically, the lower end of the heating tube 6 extends into the end cap assembly 13 and is led out by a live wire branch 145. An axially penetrating live wire channel 125 is provided inside the extension tube 12. The bottom of the control connector 121 has an annular protrusion 123 that abuts against the upper end of the mounting platform 250. The live wire channel 125 passes through the annular protrusion 123. The live wire branch 145 is connected to the circuit board 2 through the live wire channel 125. The upper part of the temperature control switch 8 is electrically connected to the circuit board 2. A live wire main line 144 is led out from the lower part of the temperature control switch 8, and the control connector... The base 121 is provided with an annular groove 126 corresponding to the assembly area 10 and the wiring area 150. The annular groove 126 is connected to the wiring harness groove 170. The live wire bus 144 is set in the annular groove 126. That is, the live wire bus 144 is led out from the lower part of the temperature control switch 8 and enters the annular groove 126, and then leads out circumferentially to the wiring harness groove 170. This establishes a wiring path for the live wire bus 144 that is independent of the neutral wire bus 143 and the grounding bus 142, avoiding the risk of accidental short circuit between the live wire and the neutral wire.

[0094] Therefore, the live wire bus 144, the ground bus 142, and the neutral wire bus 143 converge in the harness groove 170 to form the harness bus 260.

[0095] The inner diameter of the fire wire channel 125 is only required to allow the passage of the small-diameter fire wire branch 145, so it does not occupy too much radial space.

[0096] (Top and bottom wiring) Further reference Figures 23 to 24 As shown, in a specific embodiment of the wiring harness bus 260 leading out of the faucet, the wiring harness groove 170 extends axially downward on the extension tube 12 at the bottom of the control housing 11 and on the control connector 121. The wiring harness bus 260 can be led out from the wiring harness groove 170 at any position below the mounting surface 250. Its leading-out position is only limited by the fixing member of the faucet, which is configured as a retaining ring assembly 180, which fixes the faucet by abutting upward against the lower end face of the mounting surface 250.

[0097] In this embodiment, the wire harness groove 170 defines an upper cable outlet 171 above the mounting platform 250. The upper cable outlet 171 is specifically located on the control connector 121 and is fixed by the wire clamping cover 172.

[0098] The tube body 122 is provided with a retaining ring assembly 180 for abutting against the lower end face of the mounting platform 250. The retaining ring assembly 180 is sleeved on the tube body 122 and is axially adjustable. The control connector 121 and the retaining ring assembly 180 respectively provide support surfaces that abut against the upper and lower sides of the mounting platform 250 to clamp and fix the shell assembly 1 to the mounting platform 250. The lower cable outlet 183 is formed at the upper end of the retaining ring assembly 180 and aligned with the wire harness groove 170. This allows the retaining ring assembly 180 to serve as both a fixing component of the faucet, clamping and fixing it by abutting against the mounting platform 250 with its support surface, and a cable outlet component, with the lower cable outlet 183 directly opened on it for the wire harness bus 260 to be led out. At the same time, the retaining ring assembly 180 is axially adjustable to adapt to mounting platforms 250 of different thicknesses, improving the versatility of the product.

[0099] Specifically, the wire harness groove 170 is provided with an opening in the radial direction of the housing assembly 1, so that the wire harness bus 260 can be inserted into the wire harness groove 170 from the radial outside, which facilitates the wiring.

[0100] The upper cable outlet 171 is open to the radial side and extends axially to the bottom of the control connector 121, so that the cable harness bus 260 can be directly inserted into the cable harness groove 170 from the side of the control connector 121 without having to pass through from the end. When the cable harness bus 260 needs to be led out from the lower cable outlet 183, the cable harness bus 260 can pass smoothly along the axial direction and form a channel with the lower cable outlet 183, which makes it convenient for users to select the cable outlet direction according to actual needs.

[0101] The lower cable outlet 183 is open radially and extends axially to the top of the retaining ring assembly 180. When the wire harness bus 260 needs to be led out from the lower cable outlet 183, the lower cable outlet 183 on the top of the retaining ring assembly 180 actually serves as a clearance notch. On the one hand, it does not interfere with the downward arrangement of the wire harness bus 260. On the other hand, when the retaining ring assembly 180 is adjusted upward, the bottom of the lower cable outlet 183 is supported by the lead-out bend 75 of the wire harness bus 260, so that the lead-out part is limited between the mounting platform 250 and the lower cable outlet 183, avoiding bending or compression at the retaining ring assembly 180.

[0102] (Retaining ring assembly 180) Further reference Figure 23As shown, as a further embodiment of the retaining ring assembly 180, in this embodiment, the retaining ring assembly 180 and the tube body portion 122 are fixedly connected by threads. Specifically, the tube body portion 122 is provided with external threads 124, and the retaining ring assembly 180 has internal threads 189 and is connected to the external threads 124.

[0103] The wire harness groove 170 is axially connected to the external thread 124, meaning that the tooth profile of the external thread 124 is cut off at the wire harness groove 170. This allows the wire harness bus 260 to run continuously along the axial direction of the tube body portion 122 without being blocked by the thread. At the same time, when the internal thread 189 of the retaining ring assembly 180 mates with the external thread 124, the empty portion at the wire harness groove 170 does not affect the connection strength of the thread, thus achieving compatibility between wiring and fixing.

[0104] As a further embodiment of the retaining ring assembly 180, the retaining ring assembly 180 includes an annular upper retaining ring 181 and an annular lower retaining seat 182, the lower retaining seat 182 having a rough portion for user operation.

[0105] Both the upper retaining ring 181 and the lower retaining seat 182 are hollow tubular components. The lower retaining seat 182 can slide axially on the non-threaded part of the tube body 122, while the upper retaining ring 181 can slide axially relative to the lower retaining seat 182 and simultaneously slide axially relative to the threaded part of the tube body 122. The internal thread 189 of the retaining ring assembly 180 is provided on the lower retaining seat 182, thereby connecting the lower retaining seat 182 and the tube body 122 by threads. The lower outlet 183 of the retaining ring assembly 180 is opened at the top of the upper retaining ring 181. The upper retaining ring 181 is sleeved on the tube body 122 and movably connected to the upper part of the lower retaining seat 182. The upper retaining ring 181 and the lower retaining seat 182 are restricted from disengaging by an axial limiting structure, but axial relative movement between them is allowed. That is, the lower retaining seat 182 serves as the operating part when fastening the faucet. When the lower retaining seat 182 is rotated upwards, it abuts against the upper retaining ring 181, forcing the upper retaining ring 181 upwards to abut against the lower end face of the mounting surface 250, until the lower retaining seat 182 and the upper retaining ring 181 are axially abutted. Simultaneously, the main cable 260 can be led out laterally from the lower outlet 183 of the upper retaining ring 181 without passing through the lower retaining seat 182, simplifying the wiring path. This split design allows the cable outlet direction and fixing function to be independent, facilitating flexible adjustments by the user according to the actual installation situation.

[0106] During assembly, it is preferable to pre-attach the upper retaining ring 181 to the lower retaining seat 182. For this purpose, the top of the lower retaining seat 182 has a radially outwardly oriented first protrusion 184, which is preferably annular. The upper retaining ring 181 is fitted over the first protrusion 184. The bottom of the upper retaining ring 181 has a radially inwardly oriented second protrusion 185, which is also preferably annular. The second protrusion 185 is positioned below the first protrusion 184 and is located below the first protrusion 184. 4. The outer diameter of the first protrusion 184 is smaller than the inner diameter of the second protrusion 185, so as to restrict the upper retaining ring 181 from disengaging from the lower retaining seat 182. This allows the first protrusion 184 and the second protrusion 185 to form a hook engagement, so that the upper retaining ring 181 can move axially relative to the lower retaining seat 182 within a certain range, but cannot be completely disengaged. This ensures that the upper retaining ring 181 can be pushed upward by the lower retaining seat 182, while avoiding accidental separation of the two during assembly or disassembly, thus improving the convenience and safety of operation.

[0107] Specifically, the upper retaining ring 181 includes a first wall 186 and a second wall 187 that are radially spaced apart. The second wall 187 is located radially outside the first wall 186. The first wall 186 is sleeved on the tube body portion 122. The second wall 187 is used to mate with the first protrusion 184 of the lower retaining seat 182. The first wall 186 and the second wall 187 are connected at the top in the axial direction to form a top wall. The lower outlet 183 is formed between the first wall 186, the second wall 187 and the top wall. The second wall 187 is thin-walled, so that the second wall 187 can be partially expanded when assembled to the lower retaining seat 182, so that the second protrusion 185 can pass over the first protrusion 184.

[0108] Furthermore, to facilitate the expansion of the second wall 187, circumferentially spaced slots 188 are provided at the bottom of the second wall 187. These slots 188 extend partially in the axial direction to allow for localized elastic deformation of the second wall 187, facilitating the quick assembly of the upper retaining ring 181 onto the lower retaining seat 182 without the need for additional tools. Simultaneously, these slots 188 do not affect the overall structural strength and can meet the long-term stress requirements of the upper retaining ring 181.

[0109] In water tightness mode: When control valve 3 is turned to the water-closed mode, the inlet port 31, outlet port 32, and control port 33 are all disconnected. Water in the second fluid channel 5 is cut off by control valve 3 and cannot enter the first fluid channel 4, resulting in no water flow from the outlet component 230. The trigger element 102 is not affected by water pressure, the microswitch 21 is in the off state, and the heating element 6 is not energized. The faucet is completely closed.

[0110] In cold water mode: The user turns control valve 3 to cold water mode. At this time, the inlet 31 and outlet 32 ​​of control valve 3 are connected, while control port 33 remains disconnected. External cold water enters the second fluid channel 5 through the inlet 133 of end cap assembly 13, flows upward along the second fluid channel 5, reaches the inlet 31 of control valve 3, and then enters the inlet pipe 200. The cold water in the inlet pipe 200 flows downward along the inlet pipe 200 to the bottom of the first fluid channel 4, and flows into the first fluid channel 4 through the spaced openings of the inlet bracket 210. Because control port 33 is disconnected, trigger element 102 is not affected by water pressure, microswitch 21 is in the off state, and heating element 6 is not energized. Cold water flows directly upward along the first fluid channel 4 without heating and flows out from outlet component 230 for user use.

[0111] In this mode, cold water always flows through the second fluid channel 5. The thyristor 9 exchanges heat with the cold water in the second fluid channel 5 through the second heat conduction area 72 of the heat conduction seat 7, and conducts the heat generated by the thyristor 9 itself to the cold water to be carried away, thereby realizing the heat dissipation of the thyristor 9.

[0112] In hot water mode: The user turns the control valve 3 to hot water mode. The difference from cold water mode is that the incoming water flows from the control port 33 of the control valve 3 into the trigger connector 101, acting on the trigger element 102. When the water pressure reaches a preset value, the trigger element 102 deforms, and its deformed portion pushes the microswitch 21 on the circuit board 2 to close. After the microswitch 21 closes, the heating element 6 is energized and begins to heat the water in the first fluid channel 4. The heated hot water rises along the first fluid channel 4 and flows out from the outlet component 230 for the user's use.

[0113] At this time, the first fluid channel 4 contains high-temperature hot water. The heat conduction part 73 of the heat conduction seat 7 directly abuts against the surface of the heating tube 6, transferring the heat generated by the heating tube 6 to the heat conduction seat 7 through the shortest path. The temperature control switch 8 senses the water temperature in the first fluid channel 4 in real time through the first heat conduction area 71 of the heat conduction seat 7. When the water temperature exceeds the preset safety threshold, the temperature control switch 8 activates, cutting off the power supply to the heating tube 6 to achieve over-temperature protection.

[0114] Meanwhile, the thyristor 9 exchanges heat with the flowing cold water in the second fluid channel 5 through the second heat-conducting area 72 of the heat conduction seat 7, transferring the heat generated by the thyristor 9 to the cold water for removal. Since the cold water in the second fluid channel 5 is always flowing and its temperature is much lower than the operating tolerance temperature of the thyristor 9, the thermal interference from the small amount of high-temperature water flow in the first fluid channel 4 can be offset by the flowing water and will not affect the normal operation of the thyristor 9.

[0115] During assembly: On the mounting surface 114 of the control housing 11, a thermal control sealing ring 77 is inserted into a pre-set sealing groove 116. The thermal control sealing ring 77 simultaneously surrounds the outer periphery of the first fluid inlet 41 and the second fluid inlet 51, with its first sealing portion 771 corresponding to the first fluid inlet 41, its second sealing portion 772 corresponding to the second fluid inlet 51, and its third sealing portion 773 located at the intersection of the two. The heat conduction seat 7 is then attached and pressed tightly onto the mounting surface 114, covering the first fluid inlet 41 and the second fluid inlet 51. The heat conduction portion 73 of the heat conduction seat 7 extends into the first fluid channel 4 and abuts against the surface of the heating tube 6. The thermal control sealing ring 77 is compressed, forming a seal on both fluid inlets.

[0116] The lower wiring portion 82 of the temperature control switch 8 is inserted through the press-fit cover 190. The temperature control switch 8 is installed on the first heat-conducting area 71 of the heat conduction base 7, so that the temperature sensing part of the temperature control switch 8 is placed in the receiving cavity 74 of the heat conduction part 73 and in close contact with the heat conduction part 73. At the same time, the thyristor 9 is installed on the second heat-conducting area 72 of the heat conduction base 7, and the metal substrate of the thyristor 9 is bonded to the second heat-conducting area 72 through the heat conduction medium.

[0117] The press-fit cover 190 is fixedly connected to the assembly facade 114. The support leg portion 194 of the press-fit cover 190 is mounted on the step portion at the bottom of the assembly space. The live wire branch 145 is placed in the groove 192 of the press-fit cover 190. The operation port 193 on the press-fit cover 190 faces outward, which facilitates the subsequent reset operation of the temperature control switch 8.

[0118] The trigger element 102 is placed into the trigger connector 101, and the mounting bracket 104 is pressed onto the trigger element 102. The deformable portion of the trigger element 102 passes through the mounting bracket 104. The mounting bracket 104 is spaced apart on the vertical surface between the trigger connector 101 and the circuit board 2, and part of it covers the heating tube 6 extending out of the upper end of the assembly area 10. The mounting base 105 of the mounting bracket 104 extends toward the transition channel 160.

[0119] The circuit board 2 is mounted vertically, covering the top of the mounting surface 114 and the mounting plane 115 and the axial base 111. The upper wiring portion 81 of the temperature control switch 8 is connected to the circuit board 2 via a conductive sheet 83, and the lower wiring portion 82 is positioned downwards and leads out the live wire bus 144. The pins of the thyristor 9 are directly inserted and soldered onto the circuit board 2. The micro switch 21 is mounted on the circuit board 2, positioned opposite the deformable portion of the trigger element 102. The live wire branch 145 runs from the lower end of the heating tube 6 along the live wire channel 125, passes through the annular boss 123, and connects to the circuit board 2. The live wire bus 144 is placed in the annular groove 126 and led out circumferentially to the wire harness groove 170.

[0120] On the transition channel 160, a grounding connector 140 is attached to the columnar portion at the upper end of the heating tube 6, with both free ends of the grounding connector 140 extending into the transition channel 160. A bent portion 75 on the heat conduction seat 7 is led out from the side of the heat conduction seat 7 and extends into the transition channel 160, with the end of the grounding connector 76 adjacent to the free ends of the grounding connector 140. The terminal at the end of the grounding bus 142 is fitted onto the grounding bolt 141, which is then passed through the through holes on the grounding connector 140 and the grounding busbar and tightened onto the mounting base 105. At this point, the grounding paths of the heating tube 6, the heat conduction seat 7, the temperature control switch 8, and the thyristor 9 all converge at the same grounding bolt 141, and the grounding bus 142 is led out from this grounding point.

[0121] In the wiring area 150, the ground bus 142 is placed in the first harness channel 151, and the neutral bus 143 is placed in the second harness channel 152. The ground bus 142 and neutral bus 143 transition along the arc-shaped extension of their respective harness channels, then descend along the vertical extension to the outlet, converging in the harness groove 170. The live wire bus 144, after exiting from the annular groove 126, also merges into the harness groove 170, forming the harness bus 260 together with the ground bus 142 and neutral bus 143. The harness bus 260 extends axially along the harness groove 170, and can be led out from either the upper outlet 171 or the lower outlet 183 as needed.

[0122] Pass the assembled faucet through the mounting hole in the mounting surface 250, so that the annular protrusion 123 at the bottom of the control connector 121 abuts against the upper surface of the mounting surface 250. From below the mounting surface 250, pre-attach the upper retaining ring 181 to the lower retaining seat 182, and insert the pre-installed retaining ring assembly 180 from the lower end of the extension tube 12, so that the internal thread 189 of the lower retaining seat 182 engages with the external thread 124 of the tube body 122. Rotate the lower retaining seat 182 so that it moves upward along the external thread 124, and the upper end of the lower retaining seat 182 abuts against the bottom of the upper retaining ring 181, pushing the upper retaining ring 181 upward until the top of the upper retaining ring 181 is pressed against the lower surface of the mounting surface 250. Continue to tighten the lower retaining seat 182 so that the annular protrusion 123 and the upper retaining ring 181 apply clamping force from the upper and lower sides of the mounting surface 250 respectively, and firmly fix the faucet. If the upper outlet 171 is selected, the wire harness bus 260 is inserted into the wire harness groove 170 from the side of the control connector 121, passes through the upper outlet 171, and is fixed by the wire clamping cover 172.

[0123] If the lower outlet 183 is selected, the wire harness bus 260 continues to descend along the wire harness groove 170 and passes through the lower outlet 183 of the retaining ring assembly 180.

[0124] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A heating element-extended electric water faucet, comprising a shell assembly (1) forming the internal skeleton of the faucet, a circuit board (2) disposed inside the shell assembly (1), and a control valve (3) for controlling the flow of fluid, characterized in that: The housing assembly (1) has at least an extension portion extending axially below the mounting platform (250) and a control portion located above the mounting platform (250), which together define an axially extending and mutually isolated first fluid channel (4) and second fluid channel (5) inside the housing assembly (1). The first fluid channel (4) contains an axially extending heating tube (6), and the second fluid channel (5) connects external fluid to the first fluid channel (4) through a control valve (3).

2. The electric water faucet with an extended heating element according to claim 1, characterized in that: The control unit forms an assembly area (10) on one side and a wiring area (150) on the opposite side. The control unit is also provided with a transition area connecting the assembly area (10) and the wiring area (150). The assembly area (10) is provided with a first fluid port (41) and a second fluid port (51) arranged adjacent to each other, and a heat conduction seat (7) densely covering the first fluid channel (4) and the second fluid channel (5). The heat conduction seat (7) is provided with a temperature control switch (8) corresponding to the first fluid channel (4) and a thyristor (9) corresponding to the second fluid channel (5). The first fluid port (41) is connected to the first fluid channel (4), and the second fluid port (51) is connected to the second fluid channel (5).

3. The electric water faucet with an extended heating element according to claim 2, characterized in that: The wiring area (150) is provided with at least one wire harness channel and a wire harness groove (170) extending axially between the control part and the connecting part. The wire harness groove (170) communicates with the wire harness channel, and at least one of the upper connecting part (61) of the heating tube (6) and the heat conduction seat (7) extends a grounding connector (140). The grounding connector (140) extends in the transition channel (160) and is led out with a grounding bus (142). The grounding bus (142) is led out to the wire harness groove (170) through the wire harness channel.

4. The electric water faucet with an extended heating element according to claim 3, characterized in that: The shell assembly (1) includes a control housing (11) fixedly connected to the upper end of the extension tube (12) and an end cap assembly (13) fixedly connected to the lower end of the extension tube (12). The extension tube (12) includes a control connector (121) disposed above the mounting platform (250) and a tube body portion (122) located below the mounting platform (250). The tube body portion (122) extends axially and matches the heating tube (6) axially. The wire harness groove (170) is connected to the control connector (121) and extends axially on the tube body portion (122). The end cap assembly (13) is configured to connect to an external water source and communicate with a second fluid channel (5).

5. The electric water faucet with an extended heating element according to claim 4, characterized in that: The control section also includes an axial base (111), the wiring area (150) and the assembly area (10) are located on opposite sides of the axial base (111), and the transition channel (160) is adjacent to the common side of the axial base (111), the wiring area (150) and the assembly area (10). The assembly area (10) includes an assembly facade (114) and an assembly plane (115) recessed relative to the envelope contour of the faucet. The assembly plane (115) is connected between the top of the assembly facade (114) and the bottom of the axial base (111), and a first space is separated between the assembly facade (114) and the inner boundary of the envelope contour of the faucet, and a second space is separated between the assembly plane (115) and the axial base (111). The first fluid inlet (41) and the second fluid inlet (51) are arranged adjacent to each other on the assembly facade (114); the upper end of the heating tube (6) extends out of the assembly plane (115); the circuit board (2) is arranged vertically and covers the assembly facade (114) and the top of the assembly plane (115) and the axial base (111).

6. A heating element-extended electric water faucet according to claim 5, characterized in that: The upper end of the heating tube (6) extends into the assembly area (10), and the grounding connector (140) is disposed at the upper end of the heating tube (6) and extends into the transition channel (160); the heat conduction seat (7) is provided with a plurality of bends (75), the ends of the bends (75) forming grounding connectors (76), and a mounting base (105) is provided in the transition channel (160). The grounding connector (140) and the grounding connector (76) are adjacent to each other and are constrained to the mounting base (105) by grounding bolts (141).

7. A heating element-extended electric water faucet according to claim 5, characterized in that: The lower end of the heating tube (6) extends into the end cap assembly (13) and is led out with a live wire branch (145). The extension tube (12) is provided with an axially penetrating live wire channel (125). The bottom of the control connector (121) is provided with an annular protrusion (123) that abuts against the upper end of the mounting platform (250). The live wire channel (125) passes through the annular protrusion (123). The live wire branch (145) is connected to the circuit board (2) through the live wire channel (125). The upper part of the temperature control switch (8) is electrically connected to the circuit board (2). The temperature control switch (8) has a live wire bus (144) leading out from its lower part. The control connector (121) has an annular groove (126) corresponding to the assembly area (10) and the wiring area (150). The annular groove (126) is connected to the wire harness groove (170). The live wire bus (144) is located in the annular groove (126).

8. A heating element-extended electric water faucet according to claim 7, characterized in that: The assembly area (10) is also provided with a press-fit cover (190), which is fixedly connected to the assembly facade (114) and abuts against the side of the temperature control switch (8) and the thyristor (9) away from the first fluid channel (4) and the second fluid channel (5). The press-fit cover (190) is also provided with adjacent positioning grooves (191) and channels (192). The lower part of the temperature control switch (8) passes through the positioning groove (191), and the live wire branch (145) is placed in the positioning groove (191). The press-fit cover (190) is also provided with an operation port (193) for controlling the reset of the temperature control switch (8).

9. A heating element-extended electric water faucet according to claim 1, characterized in that: The control valve (3) includes at least an inlet port (31) and an outlet port (32). The inlet port (31) is connected to the second fluid channel (5) in any water outlet mode of the control valve (3), and the outlet port (32) is connected to the first fluid channel (4). The first fluid channel (4) is provided with an inlet pipe (200) extending axially toward the bottom. The inlet pipe (200) is connected to the outlet port (32). The bottom of the second fluid channel (5) is provided with an inlet support (210). The lower end of the inlet pipe (200) is mounted on the inlet support (210). The inlet pipe (200) is arranged parallel to the heating pipe (6).

10. A heating element-extended electric water faucet according to claim 5, characterized in that: The assembly facade (114) is provided with a trigger connection seat (101) erected on the assembly plane (115). The trigger connection seat (101) is located at the intersection of the assembly plane (115) and the assembly facade (114). The trigger connection seat (101) is provided with a trigger element (102). The circuit board (2) is provided with a micro switch (21) opposite to the trigger element (102). The control valve (3) is also provided with a control connection port (33) connecting to the second fluid channel (5). The trigger connection seat (101) is provided with a control channel (103) connected to the control connection port (33). The trigger element (102) is configured to receive the incoming water flow so that the heating tube (6) is energized.

11. A heating element-extended electric water faucet according to claim 10, characterized in that: The trigger connector (101) is also provided with a mounting bracket (104) pressed on the trigger element (102), and the deformable part of the trigger element (102) passes through the mounting bracket (104) and is arranged opposite to the micro switch (21); The mounting bracket (104) is spaced apart on the vertical surface between the trigger connector (101) and the circuit board (2), and at least partially covers the upper end of the heating tube (6) extending out of the assembly area (10), and the mounting bracket (104) also has a mounting base (105) extending toward the transition channel (160).

12. The electric water faucet with an extended heating element according to claim 3, characterized in that: The wiring area (150) is provided with a first wire harness channel (151) and a second wire harness channel (152). The upper end of the heating tube (6) extends out of the assembly area (10) and leads out a neutral wire bus (143). The grounding bus (142) is placed in the first wire harness channel (151) and the neutral wire bus (143) is placed in the second wire harness channel (152). The wire harness groove (170) defines an upper cable outlet (171) above the mounting platform (250); the tube body (122) is provided with a retaining ring assembly (180) for abutting against the lower end face of the mounting platform (250), the retaining ring assembly (180) is axially adjustable, and the upper end of the retaining ring assembly (180) is provided with a lower cable outlet (183) aligned with the wire harness groove (170).

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