Electric heating faucet

Abstract

The invention provides an electric heating faucet. The electric heating faucet comprises a shell assembly, an electric heating pipe and an overheating protection assembly. A heating cavity is formed in the shell assembly, and the electric heating pipe is arranged in the heating cavity and fixed to the shell assembly. The overheating protection assembly is vertically arranged in the shell assembly located at the bottom of the heating cavity in a penetrating mode and is sealed with the shell assembly in the circumferential direction, the temperature sensing end of the overheating protection assembly abuts against the heating part of the electric heating pipe and conducts heat, and the electric heating pipe and the overheating protection assembly are both electrically connected with a control circuit board in the electric heating faucet; according to the invention, convenience can be brought to assembly of the overheating protection assembly and the electric heating tube, the production cost can be reduced, and in addition, the service life of the electric heating tube can be prevented from being shortened due to the influence of high welding temperature.

Description

Technical Field

[0001] The invention relates to the technical field of water heating devices, in particular to an electric water faucet. Background Art

[0002] Electric water faucets have the advantages of fast hot water output and continuous hot water output, and more and more users are beginning to choose to use electric water faucets; currently, electric water faucets mainly include a shell assembly and an electric heating tube; a heating chamber is provided inside the shell assembly, and the electric heating tube is provided inside the heating chamber and fixed to the shell assembly; the electric water faucet also includes a metal heat conductor and a resettable thermostat; the upper end of the metal heat conductor is welded and fixed to the electric heating tube, and the lower end of the metal heat conductor passes through the bottom of the heating chamber and then extends out of the shell assembly; in addition, an annular convex edge is provided on the outer wall of the metal heat conductor, the annular convex edge abuts against the inner bottom of the heating chamber, and the annular convex edge and the inner bottom of the heating chamber are plane-sealed by a sealing ring, and the lower end of the metal heat conductor is threaded It is connected with a nut, and the metal heat conductor is fastened to the shell assembly by the nut, and the resettable thermostat is fixed on the shell assembly, and the temperature sensing end of the resettable thermostat abuts against and conducts heat with the lower end of the metal heat conductor; when the electric water faucet fails and causes the electric heating tube to dry-burn or the temperature of the electric heating tube exceeds the starting temperature of the resettable thermostat, the resettable thermostat can disconnect the power supply of the electric heating tube to achieve the purpose of thermal protection; however, in the existing electric water faucet structure, since one end of the metal heat conductor needs to be welded and fixed to the electric heating tube, the electric heating tube has the disadvantages of high production cost and complex production process; furthermore, after the metal heat conductor and the electric heating tube are welded, the service life of the electric heating tube is easily affected by the high welding temperature. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an electric water faucet, which can facilitate the assembly of the overheat protection component and the electric heating tube and reduce the production cost. In addition, it can also prevent the electric heating tube from being affected by the high temperature of welding and shortening its service life.

[0004] The present invention provides an electric water faucet, comprising a shell assembly, an electric heating tube and an overheating protection assembly; a heating cavity is arranged inside the shell assembly, the electric heating tube is arranged inside the heating cavity and is fixed to the shell assembly; the overheating protection assembly is vertically penetrated in the shell assembly located at the bottom of the heating cavity and is circumferentially sealed with the shell assembly, the temperature sensing end of the overheating protection assembly abuts against and conducts heat to the heating part of the electric heating tube, and the electric heating tube and the overheating protection assembly are both electrically connected to a control circuit board in the electric water faucet.

[0005] After adopting the above structure, the temperature sensing end of the overheat protection component abuts against and conducts heat to the heating part of the electric heating tube, that is, the temperature sensing end of the overheat protection component does not need to be fixed to the heating part of the electric heating tube by welding, thereby facilitating the assembly of the overheat protection component and the electric heating tube and reducing the production cost. In addition, it can also prevent the electric heating tube from being affected by the high temperature of welding and thus shortening its service life.

[0006] In a possible embodiment, the electric water faucet further includes a pressing member; two insertion holes are provided at the bottom of the heating chamber, and the two terminal ends of the electric heating tube are respectively vertically inserted into one of the insertion holes; a first annular step is provided on the inner wall at the lower end of each insertion hole, and the two terminal ends of the electric heating tube are respectively sleeved with a first sealing ring, and each first sealing ring is supported on the first annular step at a corresponding position, and the pressing member is connected to the bottom of the shell assembly and is used to press the two first sealing rings on the first annular step so that the first sealing ring seals the gap between the terminal end of the electric heating tube and the insertion hole; after adopting the above structure, since the two terminal ends of the electric heating tube are respectively vertically inserted therein, In a socket in the middle, and under the action of the first sealing ring, the terminal of the electric heating tube and the shell assembly are sealed by side sealing, which can effectively avoid water leakage in the heating chamber; secondly, since there is no need to sleeve and weld the copper joint on the terminal of the electric heating tube, it has the advantages of simple production process and low cost; furthermore, since the terminal of the electric heating tube does not need to fix the copper joint by welding, it can avoid the electric heating tube being affected by the high temperature of welding and shortening its service life; in addition, since there is no need to use nuts to fasten the electric heating tube and the shell assembly, it has the advantages of easy assembly of the electric heating tube and the shell assembly and high assembly efficiency.

[0007] In a possible embodiment, two first through holes are provided on the clamping piece, and the two terminal ends of the electric heating tube are respectively vertically inserted into one of the first through holes; two annular protrusions are provided on the upper end surface of the clamping piece, and the two annular protrusions are respectively coaxially arranged with one of the first through holes, and the two annular protrusions are respectively embedded in the lower end of one of the insertion holes and are used to press the first sealing ring on the corresponding side onto the first annular step; after adopting this structure, after the clamping piece is connected to the bottom of the shell assembly, the two annular protrusions can be respectively embedded in the lower end of one of the insertion holes, and at this time, each annular protrusion can press the first sealing ring on the corresponding side onto the first annular step, and after the first sealing ring is squeezed by the annular protrusion, the first sealing ring can further seal tightly with the outer peripheral wall of the terminal of the electric heating tube and the inner peripheral wall of the insertion hole, so as to improve the sealing effect of the first sealing ring on the gap between the outer peripheral wall of the terminal of the electric heating tube and the inner peripheral wall of the insertion hole.

[0008] In a possible implementation, a clamp is sleeved on one of the wiring terminals of the electric heating tube, and the two fixed ends of the clamp are fastened to the outer wall of the clamp by bolts; through the provision of the clamp, after the two fixed ends of the clamp are fastened to the clamp by bolts, not only can the clamp and the clamp be fastened, but also the clamp can clamp one of the wiring terminals of the electric heating tube, thereby effectively avoiding the vertical movement of the electric heating tube, so as to improve the reliability of the electric heating tube and the shell assembly after assembly; in addition, when the bolts fix the two fixed ends of the clamp, the grounding wire in the electric faucet is pressed on the clamp together, thereby enabling the grounding of the electric heating tube.

[0009] In a possible embodiment, a groove is provided on the outer wall of the clamping piece, and the two fixed ends of the clamp are embedded in the groove and vertically limited with the groove; after the groove is provided on the outer wall of the clamping piece, after the two fixed ends of the clamping piece are fixed to the clamping piece, the two fixed ends of the clamping piece can be embedded in the groove and vertically limited with the groove, thereby further improving the reliability and firmness of the clamping piece after assembly, and further avoiding the vertical movement of the electric heating tube, so as to further improve the reliability of the electric heating tube and the shell assembly after assembly.

[0010] In a possible embodiment, the overheat protection component includes a heat conductor and a resettable thermostat; a second through hole is provided at the bottom of the heating chamber, the heat conductor is inserted into the second through hole and is circumferentially sealed with the second through hole, a card slot is provided at the upper end of the heat conductor, the heating part of the electric heating tube is partially inserted into the card slot and is attached to the inner wall of the card slot; the resettable thermostat is arranged below the heat conductor, the temperature sensing end of the resettable thermostat abuts against the lower end of the heat conductor, and the resettable thermostat is pressed against the heat conductor by a pressing member; the resettable thermostat is electrically connected to the control circuit board; after adopting the above structure, since the upper end of the heat conductor is provided with a card slot, the heat generating end of the electric heating tube The hot part is inserted into the slot and abuts against the inner wall of the slot, that is, the heat conductor and the electric heating tube can achieve the purpose of contact heat conduction without welding, which can facilitate the assembly of the heat conductor and the electric heating tube and reduce the production cost. Since the heat conductor does not need to be welded to the electric heating tube, the service life of the electric heating tube can be avoided from being shortened by the high temperature of welding. In addition, since the heat-generating part of the electric heating tube is inserted into the slot and abuts against the inner wall of the slot, the contact area between the electric heating tube and the heat conductor can be increased, so that the heat conductor can better conduct the heat of the electric heating tube to the temperature sensing end of the resettable thermostat.

[0011] In a possible embodiment, a second sealing ring is embedded on the outer peripheral wall of the heat conductor, and the second sealing ring is used to seal the gap between the heat conductor and the second through hole; after adopting this structure, under the action of the second sealing ring, the second sealing ring can reliably seal the gap between the heat conductor and the through hole, so as to prevent water in the heating chamber from leaking through the gap between the heat conductor and the through hole; and under the action of the second sealing ring, the heat conductor and the hole wall of the through hole realize a side sealing structure, which can improve the sealing effect between the heat conductor and the shell assembly compared with the planar sealing method.

[0012] In a possible embodiment, a first annular flange is provided on the outer wall of the lower end of the heat conductor, a second annular step is provided on the inner wall of the lower end of the second through hole, and the first annular flange abuts against the second annular step; by adopting this structure, after the heat conductor is inserted into the second through hole from bottom to top, the annular flange can abut against the second annular step to limit the heat conductor, thereby improving the reliability of the heat conductor after assembly.

[0013] In a possible embodiment, a pressing column is provided on the top of the pressing member below the resettable thermostat, a rubber ring is provided between the pressing column and the resettable thermostat, an annular reduced diameter portion is provided on the inner wall of the rubber ring and in the middle of the axial direction of the rubber ring, the upper end of the rubber ring abuts against the lower end of the resettable thermostat, the upper end of the pressing column is inserted from bottom to top into the rubber ring and abuts against the annular reduced diameter portion; after adopting this structure, since the upper end of the rubber ring abuts against the lower end of the resettable thermostat, the upper end of the pressing column is inserted from bottom to top into the rubber ring and abuts against the annular reduced diameter portion, that is, under the action of the rubber ring, the pressing column can achieve flexible compression of the resettable thermostat, thereby avoiding the resettable thermostat from being crushed; and since the upper end of the pressing column is inserted from bottom to top into the rubber ring and abuts against the annular reduced diameter portion, the purpose of limiting between the rubber ring and the pressing column can be achieved.

[0014] In a possible implementation, an open groove with openings at the upper end and the side is provided on the pressure column, and the reset end of the resettable thermostat extends into the open groove; by adopting this structure, when the resettable thermostat realizes overheating protection, without removing the clamping piece, the user can insert a rod-like object into the open groove and push the reset end of the resettable thermostat, which can facilitate the reset of the resettable thermostat.

[0015] In a possible embodiment, the electric faucet also includes a contact bracket, which is located below the pressing piece. The contact bracket is fixed to the bottom of the shell assembly by a plurality of screws distributed circumferentially and is used to press the pressing piece onto the bottom of the shell assembly. Through the setting of the contact bracket, the contact bracket is used to install the conductive contact assembly in the existing electric faucet. Under the action of the contact bracket, the contact bracket can press the pressing piece onto the bottom of the shell assembly, that is, after the contact bracket is fixed to the shell assembly, the pressing piece can be naturally pressed onto the bottom of the shell assembly, thereby having the advantage of convenient fixing of the pressing piece, that is, the advantage of convenient connection between the pressing piece and the shell assembly.

[0016] In a possible embodiment, the shell assembly includes an upper end cover, a lower end cover and a connecting cylinder made of metal material; the lower end of the upper end cover is fixed to the upper end of the connecting cylinder and is circumferentially sealed, and the upper end of the lower end cover is fixed to the lower end of the connecting cylinder and is circumferentially sealed; the upper end cover, the lower end cover and the connecting cylinder form a heating chamber, and the heating part of the electric heating tube is located in the middle of the heating chamber; by setting up the connecting cylinder made of metal material, even if the electric water faucet causes the electric heating tube in the electric water faucet to dry burn due to a malfunction or lack of water, since the connecting cylinder is close to the heating part of the electric heating tube and the connecting cylinder is made of metal material, the connecting cylinder has the characteristic of high temperature resistance, thereby effectively avoiding the electric water faucet from catching fire and eliminating safety hazards.

[0017] In a possible embodiment, the lower end of the upper end cover is inserted into the upper end of the connecting cylinder, and a first sealing component is embedded on the outer wall of the lower end of the upper end cover, and the first sealing component is used to seal the gap between the upper end cover and the connecting cylinder; by adopting this structure, under the action of the first sealing component, after the lower end of the upper end cover is inserted into the upper end of the connecting cylinder, the first sealing component can reliably seal the gap between the upper end cover and the connecting cylinder to avoid water leakage between the upper end cover and the connecting cylinder; in addition, the above-mentioned first sealing component includes two first O-rings spaced apart along the axial direction of the connecting cylinder, and the two first O-rings are tightly sealed with the outer peripheral wall of the upper end cover and the inner peripheral wall of the connecting cylinder, so as to reliably achieve the sealing of the gap between the upper end cover and the connecting cylinder.

[0018] In a possible embodiment, a plurality of first screw holes distributed at circumferential intervals are provided on the side wall of the upper end of the connecting cylinder, and the connecting cylinder is fastened to the upper end cover by first screws inserted through the first screw holes, and all the first screw holes are located above the first sealing assembly; by adopting this structure, the upper end cover can be reliably fixed to the upper end of the connecting cylinder by the first screws, and since all the first screw holes are located above the first sealing assembly, it is possible to avoid damaging the sealing structure between the upper end cover and the connecting cylinder.

[0019] In a possible embodiment, a second annular flange is provided on the outer wall of the upper end cover, and the upper end of the connecting cylinder abuts against the second annular flange; by adopting this structure, after the lower end of the upper end cover is inserted into the upper end of the connecting cylinder, the second annular flange can abut against the upper end of the connecting cylinder, thereby achieving a limiting effect on the upper end cover and the connecting cylinder, that is, it can facilitate the assembly of the upper end cover and the connecting cylinder, and can improve the reliability of the upper end cover and the connecting cylinder after assembly.

[0020] In a possible embodiment, the upper end of the lower end cover is inserted into the lower end of the connecting cylinder, and a second sealing assembly is embedded on the outer wall of the upper end of the lower end cover, and the second sealing assembly is used to seal the gap between the lower end cover and the connecting cylinder; by adopting this structure, under the action of the second sealing assembly, after the upper end of the lower end cover is inserted into the lower end of the connecting cylinder, the second sealing assembly can reliably seal the gap between the lower end cover and the connecting cylinder to avoid water leakage between the lower end cover and the connecting cylinder; in addition, the above-mentioned second sealing assembly includes two second O-rings spaced apart along the axial direction of the connecting cylinder, and the two second O-rings are tightly sealed with the outer peripheral wall of the lower end cover and the inner peripheral wall of the connecting cylinder, so as to reliably achieve the sealing of the gap between the lower end cover and the connecting cylinder.

[0021] In a possible embodiment, a plurality of second screw holes distributed at circumferential intervals are provided on the side wall of the lower end of the connecting cylinder, and the connecting cylinder is fastened to the lower end cover by second screws inserted through the second screw holes, and all the second screw holes are located below the second sealing assembly; by adopting this structure, the lower end cover can be reliably fixed to the lower end of the connecting cylinder by the second screws, and since all the second screw holes are located below the second sealing assembly, it is possible to avoid damaging the sealing structure between the lower end cover and the connecting cylinder.

[0022] In a possible embodiment, a protrusion is provided on the outer wall of the lower end cover, and the lower end of the connecting cylinder abuts against the protrusion; by adopting this structure, after the upper end of the lower end cover is inserted into the lower end of the connecting cylinder, the protrusion can abut against the lower end of the connecting cylinder, thereby achieving a limiting effect on the lower end cover and the connecting cylinder, that is, it can facilitate the assembly of the lower end cover and the connecting cylinder, and can improve the reliability of the lower end cover and the connecting cylinder after assembly.

[0023] In one possible implementation, the connecting cylinder is made of stainless steel. The connecting cylinder has the advantages of good high temperature resistance and water corrosion resistance, and can effectively avoid the formation of scale on the inner wall of the connecting cylinder. In addition, the connecting cylinder can also be made of iron, copper, etc.

[0024] In a possible embodiment, the electric water faucet further includes a thyristor, a lower shell and a connecting pipe made of a metal material; the upper end of the lower shell is fixed to the lower end of the shell assembly; a water inlet channel is arranged inside the lower shell, a water flow channel is arranged inside the shell assembly, the lower end of the connecting pipe is connected to the water outlet end of the water inlet channel and is circumferentially sealed, and the upper end of the connecting pipe is connected to the water inlet end of the water flow channel and is circumferentially sealed; a connecting part is arranged on the outer side wall of the connecting pipe, the thyristor is fixed on the connecting part and contacts the connecting part for heat conduction; by adopting the above structure, when the electric water faucet is used, when tap water enters and flows into the water inlet channel from the water inlet channel, In the process of flowing into the water flow channel through the connecting pipe, under the action of the connecting pipe and the connecting part, the heat from the thyristor can be reliably conducted to the tap water flowing through the connecting pipe, that is, the tap water flowing through the connecting pipe can absorb the heat of the thyristor when it is working, so as to achieve reliable heat dissipation of the thyristor, thereby effectively avoiding overheating and damage of the thyristor, and thus increasing the service life of the electric water faucet; in addition, when the tap water flowing through the connecting pipe dissipates the heat of the thyristor, the heat from the thyristor can also be used to preheat the tap water flowing through the connecting pipe, that is, to achieve the purpose of saving energy.

[0025] In a possible embodiment, the lower end of the connecting pipe is inserted into the water outlet end of the water inlet channel, and a third sealing ring is embedded on the outer wall of the lower end of the connecting pipe, and the third sealing ring is used to seal the gap between the outer peripheral wall of the connecting pipe and the inner peripheral wall of the water outlet end of the water inlet channel; by adopting this structure, after the lower end of the connecting pipe is inserted into the water outlet end of the water inlet channel, the lower end of the connecting pipe can be connected to the water outlet end of the water inlet channel, and under the action of the third sealing ring, the purpose of circumferential sealing can be reliably achieved between the lower end of the connecting pipe and the water outlet end of the water inlet channel.

[0026] In a possible embodiment, the upper end of the connecting pipe is inserted into the water inlet end of the water flow channel, and a fourth sealing ring is embedded on the outer wall of the upper end of the connecting pipe, and the fourth sealing ring is used to seal the gap between the outer peripheral wall of the connecting pipe and the inner peripheral wall of the water inlet end of the water flow channel; by adopting this structure, after the upper end of the connecting pipe is inserted into the water inlet end of the water flow channel, the upper end of the connecting pipe can be connected to the water inlet end of the water flow channel, and under the action of the fourth sealing ring, the purpose of circumferential sealing can be reliably achieved between the upper end of the connecting pipe and the water inlet end of the water flow channel.

[0027] In a possible embodiment, the upper edge of the connecting portion abuts against the bottom of the shell assembly, the lower edge of the connecting portion abuts against the top of the lower shell, and the connecting portion is vertically limited between the shell assembly and the lower shell; by adopting this structure, the connecting portion can be reliably limited between the shell assembly and the lower shell, and after the connecting portion is vertically limited, the axial movement of the connecting pipe relative to the shell assembly and the lower shell can be avoided, thereby improving the reliability of the connecting pipe after being connected to the water inlet channel and the water flow channel.

[0028] In a possible implementation, the connecting pipe and the connecting part are made of stainless steel material in one piece; after the connecting pipe and the connecting part are made of stainless steel material, they have the advantages of good thermal conductivity and high structural strength, so that the heat from the thyristor can be reliably conducted to the water flowing through the connecting pipe, that is, the water flowing through the connecting pipe can absorb the heat of the thyristor when it is working, so as to achieve reliable heat dissipation of the thyristor; and because the connecting pipe and the connecting part are made of one piece, they have the advantages of high connection strength and good thermal conductivity; in addition, when the water flowing through the connecting pipe dissipates heat for the thyristor, the heat from the thyristor can also be used to preheat the water flowing through the connecting pipe, that is, the purpose of saving energy can be achieved; in addition, the connecting pipe and the connecting part can also be made of copper material, aluminum material, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention after removing some structures;

[0031] Figure 3 This is a schematic diagram of a partially exploded three-dimensional structure of the present invention after removing some structures;

[0032] Figure 4 This is the first cross-sectional structural schematic diagram of the present invention after removing part of the structure;

[0033] Figure 5 for Figure 4 The schematic diagram of the structure after the enlargement of A in the middle;

[0034] Figure 6 This is a second cross-sectional structural schematic diagram of the present invention after removing part of the structure;

[0035] Figure 7 for Figure 6 The schematic diagram of the structure after the enlargement of B in the middle;

[0036] Figure 8 It is a schematic diagram of the three-dimensional structure after the heat conducting member and the electric heating tube are assembled;

[0037] Fig. 9It is a schematic diagram of the cross-sectional structure of the present invention. DETAILED DESCRIPTION

[0038] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0039] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0040] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] See also Figure 1-9 As shown, an embodiment of the present application discloses an electric water faucet, comprising a shell assembly 1, an electric heating tube 2 and an overheating protection assembly 3; a heating chamber 11 is arranged inside the shell assembly 1, and the electric heating tube 2 is arranged inside the heating chamber 11 and fixed to the shell assembly 1; the overheating protection assembly 3 is vertically penetrated in the shell assembly 1 located at the bottom of the heating chamber 11 and is circumferentially sealed with the shell assembly 1, the temperature sensing end of the overheating protection assembly 3 abuts against and conducts heat to the heating part of the electric heating tube 2, and the electric heating tube 2 and the overheating protection assembly 3 are both electrically connected to the control circuit board in the electric water faucet.

[0043] The electric water faucet also includes a pressing member 4; two jacks 12 are provided at the bottom of the heating chamber 11, and the two terminals of the electric heating tube 2 are respectively vertically inserted into one of the jacks 12; a first annular step 121 is provided on the inner wall of the lower end of each jack 12, and a first sealing ring 21 is sleeved on the two terminals of the electric heating tube 2, and each first sealing ring 21 is supported on the first annular step 121 at the corresponding position, and the pressing member 4 is connected to the bottom of the shell assembly 1 and is used to press the two first sealing rings 21 on the first annular step 121 so that the first sealing ring 21 seals the gap between the terminal of the electric heating tube 2 and the jack 12; after adopting the above structure, due to the two terminals of the electric heating tube The wiring terminals are respectively vertically inserted into one of the sockets, and under the action of the first sealing ring, the wiring terminals of the electric heating tube and the shell assembly are sealed by side sealing, thereby effectively avoiding water leakage in the heating chamber; secondly, since there is no need to sleeve and weld the copper joint on the wiring terminals of the electric heating tube, it has the advantages of simple production process and low cost; furthermore, since the wiring terminals of the electric heating tube do not need to fix the copper joint by welding, it can avoid the electric heating tube being affected by the high temperature of welding and shortening its service life; in addition, since there is no need to use nuts to fasten the electric heating tube and the shell assembly, it has the advantages of convenient assembly of the electric heating tube and the shell assembly and high assembly efficiency.

[0044] Two first through holes 41 are provided on the clamping piece 4, and the two terminal ends of the electric heating tube 2 are respectively vertically inserted into one of the first through holes 41; two annular protrusions 42 are provided on the upper end surface of the clamping piece 4, and the two annular protrusions 42 are respectively coaxially arranged with one of the first through holes 41, and the two annular protrusions 42 are respectively embedded in the lower end of one of the insertion holes 12 and are used to press the first sealing ring 21 on the corresponding side onto the first annular step 121; by adopting this structure, after the clamping piece is connected to the bottom of the shell assembly, the two annular protrusions can be respectively embedded in the lower end of one of the insertion holes, at this time, each annular protrusion can press the first sealing ring on the corresponding side onto the first annular step, and after the first sealing ring is squeezed by the annular protrusion, the first sealing ring can further be tightly sealed with the outer peripheral wall of the terminal end of the electric heating tube and the inner peripheral wall of the insertion hole, so as to improve the sealing effect of the first sealing ring on the gap between the outer peripheral wall of the terminal end of the electric heating tube and the inner peripheral wall of the insertion hole.

[0045] A clamp 5 is sleeved on one of the wiring terminals of the electric heating tube 2, and the two fixed ends of the clamp 5 are fastened to the outer wall of the clamp 4 by bolts; through the setting of the clamp, after the two fixed ends of the clamp are fastened to the clamp by bolts, not only can the clamp and the clamp be fastened, but also the clamp can clamp one of the wiring terminals of the electric heating tube, thereby effectively avoiding the vertical movement of the electric heating tube, so as to improve the reliability of the electric heating tube and the shell assembly after assembly; in addition, when the bolts fix the two fixed ends of the clamp, the grounding wire in the electric water faucet is pressed on the clamp together, thereby achieving grounding of the electric heating tube.

[0046] A groove 43 is provided on the outer wall of the clamping piece 4, and the two fixed ends of the clamp 5 are embedded in the groove 43 and vertically limited with the groove 43; after the groove is provided on the outer wall of the clamping piece, after the two fixed ends of the clamp are fixed to the clamping piece, the two fixed ends of the clamp can be embedded in the groove and vertically limited with the groove, thereby further improving the reliability and firmness of the clamp and the clamping piece after assembly, and further avoiding the vertical movement of the electric heating tube, so as to further improve the reliability of the electric heating tube and the shell assembly after assembly.

[0047] The overheat protection assembly 3 includes a heat-conducting member 31 and a resettable thermostat 32; a second through hole 13 is provided at the bottom of the heating chamber 11, the heat-conducting member 31 is inserted into the second through hole 13 and is circumferentially sealed with the second through hole 13, a card slot 311 is provided at the upper end of the heat-conducting member 31, the heating part of the electric heating tube 2 is partially inserted into the card slot 311 and is attached to the inner wall of the card slot 311; the resettable thermostat 32 is arranged below the heat-conducting member 31, the temperature-sensing end of the resettable thermostat 32 is against the lower end of the heat-conducting member 31, and the resettable thermostat 32 is pressed on the heat-conducting member 31 by the pressing member 4; the resettable thermostat 32 is electrically connected to the control circuit board; after adopting the above structure, due to the heat-conducting member A slot is provided at the upper end, and the heating portion of the electric heating tube is partially inserted into the slot and abuts against the inner wall of the slot, that is, the heat-conducting member and the electric heating tube can achieve the purpose of contact heat conduction without welding, thereby facilitating the assembly of the heat-conducting member and the electric heating tube and reducing the production cost. Moreover, since the heat-conducting member does not need to be welded to the electric heating tube, the service life of the electric heating tube can be avoided from being shortened by the high temperature of welding. In addition, since the heating portion of the electric heating tube is partially inserted into the slot and abuts against the inner wall of the slot, the contact area between the electric heating tube and the heat-conducting member can be increased, so that the heat-conducting member can better conduct the heat of the electric heating tube to the temperature sensing end of the resettable thermostat.

[0048] A second sealing ring 33 is embedded on the outer peripheral wall of the heat conductive member 31, and the second sealing ring 33 is used to seal the gap between the heat conductive member 31 and the second through hole 13. After adopting this structure, under the action of the second sealing ring, the second sealing ring can reliably seal the gap between the heat conductive member and the through hole to prevent water in the heating chamber from leaking through the gap between the heat conductive member and the through hole. And under the action of the second sealing ring, the heat conductive member and the hole wall of the through hole realize a side sealing structure, which can improve the sealing effect between the heat conductive member and the shell assembly compared with the planar sealing method.

[0049] A first annular flange 312 is provided on the outer wall of the lower end of the heat conductor 31, and a second annular step 131 is provided on the inner wall of the lower end of the second through hole 13, and the first annular flange 312 abuts against the second annular step 131; by adopting this structure, after the heat conductor is inserted into the second through hole from bottom to top, the annular flange can abut against the second annular step to limit the heat conductor, thereby improving the reliability of the heat conductor after assembly.

[0050] A pressing column 44 is provided at the top of the pressing member 4 below the resettable thermostat 32, a rubber ring 34 is provided between the pressing column 44 and the resettable thermostat 32, an annular reduced diameter portion 341 is provided on the inner wall of the rubber ring 34 and in the middle of the axial direction of the rubber ring 34, the upper end of the rubber ring 34 abuts against the lower end of the resettable thermostat 32, the upper end of the pressing column 44 is inserted into the rubber ring 34 from bottom to top and abuts against the annular reduced diameter portion 341; by adopting this structure Afterwards, since the upper end of the rubber ring abuts against the lower end of the resettable thermostat, the upper end of the top pressure column is inserted into the rubber ring from bottom to top and abuts against the annular reduced diameter portion, that is, under the action of the rubber ring, the top pressure column can achieve flexible compression of the resettable thermostat, thereby preventing the resettable thermostat from being crushed; and since the upper end of the top pressure column is inserted into the rubber ring from bottom to top and abuts against the annular reduced diameter portion, the purpose of limiting the position between the rubber ring and the top pressure column can be achieved.

[0051] The pressing column 44 is provided with an open groove 45 with openings at the upper end and the side, and the reset end 321 of the resettable thermostat 32 extends into the open groove 45; by adopting this structure, when the resettable thermostat realizes overheat protection, the user can insert a rod-like object into the open groove and push the reset end of the resettable thermostat without removing the pressing piece, which can facilitate the reset of the resettable thermostat.

[0052] The electric faucet also includes a contact bracket 6, which is located below the clamping piece 4. The contact bracket 6 is fixed to the bottom of the shell assembly 1 by a number of screws distributed at circumferential intervals and is used to clamp the clamping piece 4 to the bottom of the shell assembly 1. Through the setting of the contact bracket, the contact bracket is used to install the conductive contact assembly in the existing electric faucet. Under the action of the contact bracket, the contact bracket can clamp the clamping piece to the bottom of the shell assembly, that is, after the contact bracket is fixed to the shell assembly, the clamping piece can be naturally clamped to the bottom of the shell assembly, thereby having the advantage of convenient fixing of the clamping piece, that is, the advantage of convenient connection between the clamping piece and the shell assembly.

[0053] The shell assembly 1 includes an upper end cover 14, a lower end cover 15 and a connecting cylinder 16 made of metal material; the lower end of the upper end cover 14 is fixed to the upper end of the connecting cylinder 16 and circumferentially sealed, and the upper end of the lower end cover 15 is fixed to the lower end of the connecting cylinder 16 and circumferentially sealed; the upper end cover 14, the lower end cover 15 and the connecting cylinder 16 surround a heating chamber 11, and the heating part of the electric heating tube 2 is located in the middle of the heating chamber 11; through the setting of the connecting cylinder made of metal material, even if the electric water faucet causes the electric heating tube in the electric water faucet to dry burn due to a malfunction or lack of water, since the connecting cylinder is close to the heating part of the electric heating tube and the connecting cylinder is made of metal material, the connecting cylinder has the characteristics of high temperature resistance, thereby effectively avoiding the electric water faucet from catching fire and eliminating safety hazards.

[0054] The lower end of the upper end cover 14 is inserted into the upper end of the connecting cylinder 16, and a first sealing component 141 is embedded on the outer wall of the lower end of the upper end cover 14, and the first sealing component 141 is used to seal the gap between the upper end cover 14 and the connecting cylinder 16; by adopting this structure, under the action of the first sealing component, after the lower end of the upper end cover is inserted into the upper end of the connecting cylinder, the first sealing component can reliably seal the gap between the upper end cover and the connecting cylinder to avoid water leakage between the upper end cover and the connecting cylinder; in addition, the above-mentioned first sealing component includes two first O-rings spaced apart along the axial direction of the connecting cylinder, and the two first O-rings are tightly sealed with the outer peripheral wall of the upper end cover and the inner peripheral wall of the connecting cylinder, so as to reliably achieve the sealing of the gap between the upper end cover and the connecting cylinder.

[0055] A plurality of first screw holes 161 are provided on the side wall of the upper end of the connecting cylinder 16 and are distributed at circumferential intervals. The connecting cylinder 16 is fastened to the upper end cover 14 by means of first screws inserted through the first screw holes 161, and all the first screw holes 161 are located above the first sealing assembly 141. By adopting this structure, the upper end cover can be reliably fixed to the upper end of the connecting cylinder by means of the first screws, and since all the first screw holes are located above the first sealing assembly, it is possible to avoid damaging the sealing structure between the upper end cover and the connecting cylinder.

[0056] A second annular flange 142 is provided on the outer wall of the upper end cover 14, and the upper end of the connecting cylinder 16 abuts against the second annular flange 142; by adopting this structure, after the lower end of the upper end cover is inserted into the upper end of the connecting cylinder, the second annular flange can abut against the upper end of the connecting cylinder, thereby achieving a limiting effect on the upper end cover and the connecting cylinder, that is, it can facilitate the assembly of the upper end cover and the connecting cylinder, and can improve the reliability of the upper end cover and the connecting cylinder after assembly.

[0057] The upper end of the lower end cover 15 is inserted into the lower end of the connecting cylinder 16, and a second sealing component 151 is embedded on the outer wall of the upper end of the lower end cover 15, and the second sealing component 151 is used to seal the gap between the lower end cover 15 and the connecting cylinder 16; by adopting this structure, under the action of the second sealing component, after the upper end of the lower end cover is inserted into the lower end of the connecting cylinder, the second sealing component can reliably seal the gap between the lower end cover and the connecting cylinder to avoid water leakage between the lower end cover and the connecting cylinder; in addition, the above-mentioned second sealing component includes two second O-rings spaced apart along the axial direction of the connecting cylinder, and the two second O-rings are tightly sealed with the outer peripheral wall of the lower end cover and the inner peripheral wall of the connecting cylinder, so as to reliably achieve the sealing of the gap between the lower end cover and the connecting cylinder.

[0058] A plurality of second screw holes 162 are provided on the side wall at the lower end of the connecting cylinder 16 and are distributed at circumferential intervals. The connecting cylinder 16 is fastened to the lower end cover 15 by second screws inserted through the second screw holes 162, and all the second screw holes 162 are located below the second sealing assembly 151. By adopting this structure, the lower end cover can be reliably fixed to the lower end of the connecting cylinder by the second screws, and since all the second screw holes are located below the second sealing assembly, it is possible to avoid damaging the sealing structure between the lower end cover and the connecting cylinder.

[0059] A protrusion 152 is provided on the outer wall of the lower end cover 15, and the lower end of the connecting cylinder 16 abuts against the protrusion 152; by adopting this structure, after the upper end of the lower end cover is inserted into the lower end of the connecting cylinder, the protrusion can abut against the lower end of the connecting cylinder, thereby achieving a limiting effect on the lower end cover and the connecting cylinder, that is, it can facilitate the assembly of the lower end cover and the connecting cylinder, and can improve the reliability of the lower end cover and the connecting cylinder after assembly.

[0060] The connecting cylinder 16 is made of stainless steel. The connecting cylinder has the advantages of good high temperature resistance and water corrosion resistance, and can effectively avoid the formation of scale on the inner wall of the connecting cylinder. In addition, the connecting cylinder can also be made of iron, copper, etc.

[0061] The electric water faucet also includes a thyristor 7, a lower shell 8 and a connecting pipe 9 made of a metal material; the upper end of the lower shell 8 is fixed to the lower end of the shell assembly 1; a water inlet channel 81 is arranged inside the lower shell 8, a water flow channel 17 is arranged inside the shell assembly 1, the lower end of the connecting pipe 9 is connected to the water outlet end of the water inlet channel 81 and is circumferentially sealed, and the upper end of the connecting pipe 9 is connected to the water inlet end of the water flow channel 17 and is circumferentially sealed; a connecting portion 91 is arranged on the outer wall of the connecting pipe 9, and the thyristor 7 is fixed on the connecting portion 91 and contacts the connecting portion 91 for heat conduction; by adopting the above structure, when the electric water faucet is used, when tap water flows from In the process of water entering the water inlet channel and flowing into the water flow channel through the connecting pipe, under the action of the connecting pipe and the connecting part, the heat from the thyristor can be reliably conducted to the tap water flowing through the connecting pipe, that is, the tap water flowing through the connecting pipe can absorb the heat of the thyristor when it is working, so as to achieve reliable heat dissipation of the thyristor, thereby effectively avoiding overheating and damage of the thyristor, and thus increasing the service life of the electric water faucet; in addition, when the tap water flowing through the connecting pipe dissipates the heat of the thyristor, the heat from the thyristor can also be used to preheat the tap water flowing through the connecting pipe, that is, to achieve the purpose of saving energy.

[0062] The lower end of the connecting pipe 9 is inserted into the water outlet end of the water inlet channel 81, and a third sealing ring 92 is embedded on the outer wall of the lower end of the connecting pipe 9. The third sealing ring 92 is used to seal the gap between the outer peripheral wall of the connecting pipe 9 and the inner peripheral wall of the water outlet end of the water inlet channel 81. By adopting this structure, after the lower end of the connecting pipe is inserted into the water outlet end of the water inlet channel, the lower end of the connecting pipe can be connected to the water outlet end of the water inlet channel, and under the action of the third sealing ring, the purpose of circumferential sealing can be reliably achieved between the lower end of the connecting pipe and the water outlet end of the water inlet channel.

[0063] The upper end of the connecting pipe 9 is inserted into the water inlet end of the water flow channel 17, and a fourth sealing ring 93 is embedded on the outer wall of the upper end of the connecting pipe 9. The fourth sealing ring 93 is used to seal the gap between the outer peripheral wall of the connecting pipe 9 and the inner peripheral wall of the water inlet end of the water flow channel 17. By adopting this structure, after the upper end of the connecting pipe is inserted into the water inlet end of the water flow channel, the upper end of the connecting pipe can be connected to the water inlet end of the water flow channel, and under the action of the fourth sealing ring, the purpose of circumferential sealing can be reliably achieved between the upper end of the connecting pipe and the water inlet end of the water flow channel.

[0064] The upper edge of the connecting portion 91 abuts against the bottom of the shell assembly 1, and the lower edge of the connecting portion 91 abuts against the top of the lower shell 8, and the connecting portion 91 is vertically limited between the shell assembly 1 and the lower shell 8; by adopting this structure, the connecting portion can be reliably limited between the shell assembly and the lower shell, and after the connecting portion is vertically limited, the axial movement of the connecting pipe relative to the shell assembly and the lower shell can be avoided, thereby improving the reliability of the connecting pipe after being connected to the water inlet channel and the water flow channel.

[0065] The connecting pipe 9 and the connecting part 91 are made of stainless steel material in one piece. After the connecting pipe and the connecting part are made of stainless steel material, they have the advantages of good thermal conductivity and high structural strength, so that the heat from the thyristor can be reliably conducted to the water flowing through the connecting pipe, that is, the water flowing through the connecting pipe can absorb the heat of the thyristor when it is working, so as to achieve reliable heat dissipation of the thyristor. And because the connecting pipe and the connecting part are made of one piece, they have the advantages of high connection strength and good thermal conductivity. In addition, when the water flowing through the connecting pipe dissipates heat for the thyristor, the heat from the thyristor can also be used to preheat the water flowing through the connecting pipe, that is, the purpose of saving energy can be achieved. In addition, the connecting pipe and the connecting part can also be made of copper material, aluminum material, etc.

[0066] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An electric water faucet, comprising a housing assembly (1), an electric heating tube (2) and an overheat protection assembly (3); a heating chamber (11) is arranged inside the housing assembly (1), and the electric heating tube (2) is arranged inside the heating chamber (11) and fixed to the housing assembly (1); characterized in that: The overheat protection component (3) is vertically inserted into the shell component (1) located at the bottom of the heating chamber (11) and is circumferentially sealed with the shell component (1); the temperature sensing end of the overheat protection component (3) abuts against and conducts heat to the heating portion of the electric heating tube (2); and the electric heating tube (2) and the overheat protection component (3) are both electrically connected to a control circuit board in the electric water faucet.

2. The electric water faucet according to claim 1, characterized in that: The electric water faucet further comprises a pressing member (4); two insertion holes (12) are arranged at the bottom of the heating chamber (11); the two connection terminals of the electric heating tube (2) are respectively vertically inserted into one of the insertion holes (12); a first annular step (121) is arranged on the inner wall at the lower end of each insertion hole (12); the two connection terminals of the electric heating tube (2) are respectively sleeved with a first sealing ring (21); each of the first sealing rings (21) is supported on the first annular step (121) at a corresponding position; the pressing member (4) is connected to the bottom of the housing assembly (1) and is used to press the two first sealing rings (21) onto the first annular step (121) so that the first sealing ring (21) seals the gap between the connection terminal of the electric heating tube (2) and the insertion hole (12).

3. The electric water faucet according to claim 2, characterized in that: The clamping piece (4) is provided with two first through holes (41), and the two connection terminals of the electric heating tube (2) are respectively vertically inserted into one of the first through holes (41); the upper end surface of the clamping piece (4) is provided with two annular protrusions (42), and the two annular protrusions (42) are respectively coaxially arranged with one of the first through holes (41), and the two annular protrusions (42) are respectively embedded in the lower end of one of the insertion holes (12) and are used to press the first sealing ring (21) on the corresponding side onto the first annular step (121).

4. The electric water faucet according to claim 3, characterized in that: A clamp (5) is sleeved on one of the connection terminals of the electric heating tube (2), and the two fixed ends of the clamp (5) are fastened to the outer wall of the clamp (4) by bolts; a groove (43) is provided on the outer wall of the clamp (4), and the two fixed ends of the clamp (5) are embedded in the groove (43) and are vertically limited with the groove (43).

5. The electric water faucet according to claim 2, characterized in that: The overheat protection component (3) comprises a heat conducting member (31) and a resettable thermostat (32); a second through hole (13) is provided at the bottom of the heating chamber (11); the heat conducting member (31) is inserted into the second through hole (13) and is circumferentially sealed with the second through hole (13); a slot (311) is provided at the upper end of the heat conducting member (31); a heating portion of the electric heating tube (2) is partially inserted into the slot (311) and is in contact with the inner wall of the slot (311); the resettable thermostat (32) is provided below the heat conducting member (31); a temperature sensing end of the resettable thermostat (32) is in contact with the lower end of the heat conducting member (31); the resettable thermostat (32) is pressed onto the heat conducting member (31) by a pressing member (4); and the resettable thermostat (32) is electrically connected to the control circuit board.

6. The electric water faucet according to claim 5, characterized in that: A second sealing ring (33) is embedded on the outer peripheral wall of the heat-conducting member (31), and the second sealing ring (33) is used to seal the gap between the heat-conducting member (31) and the second through hole (13); a first annular convex edge (312) is provided on the outer wall of the lower end of the heat-conducting member (31), and a second annular step (131) is provided on the inner wall of the lower end of the second through hole (13), and the first annular convex edge (312) abuts against the second annular step (131).

7. The electric water faucet according to claim 5, characterized in that: A pressing column (44) is arranged at the top of the pressing member (4) below the resettable thermostat (32); a rubber ring (34) is arranged between the pressing column (44) and the resettable thermostat (32); an annular reduced diameter portion (341) is arranged on the inner wall of the rubber ring (34) and in the middle of the axial direction of the rubber ring (34); the upper end of the rubber ring (34) abuts against the lower end of the resettable thermostat (32); the upper end of the pressing column (44) is inserted into the rubber ring (34) from bottom to top and abuts against the annular reduced diameter portion (341); an opening groove (45) with openings at the upper end and the side is arranged on the pressing column (44); the reset end (321) of the resettable thermostat (32) extends into the opening groove (45).

8. The electric water faucet according to any one of claims 2 to 7, characterized in that: The electric hot water faucet further comprises a contact bracket (6), wherein the contact bracket (6) is located below the pressing member (4), and the contact bracket (6) is fixed to the bottom of the housing assembly (1) by means of a plurality of screws distributed at circumferential intervals, and is used to press the pressing member (4) onto the bottom of the housing assembly (1).

9. The electric water faucet according to claim 1, characterized in that: The shell assembly (1) comprises an upper end cover (14), a lower end cover (15) and a connecting cylinder (16) made of a metal material; the lower end of the upper end cover (14) is fixed to the upper end of the connecting cylinder (16) and is circumferentially sealed, and the upper end of the lower end cover (15) is fixed to the lower end of the connecting cylinder (16) and is circumferentially sealed; the upper end cover (14), the lower end cover (15) and the connecting cylinder (16) surround the heating chamber (11), and the heating portion of the electric heating tube (2) is located in the middle of the heating chamber (11).

10. The electric water faucet according to claim 1, characterized in that: The electric water faucet further comprises a thyristor (7), a lower shell (8) and a connecting pipe (9) made of a metal material; the upper end of the lower shell (8) is fixed to the lower end of the shell assembly (1); a water inlet channel (81) is provided inside the lower shell (8), a water flow channel (17) is provided inside the shell assembly (1), the lower end of the connecting pipe (9) is connected to the water outlet end of the water inlet channel (81) and is circumferentially sealed, and the upper end of the connecting pipe (9) is connected to the water inlet end of the water flow channel (17) and is circumferentially sealed; a connecting portion (91) is provided on the outer side wall of the connecting pipe (9), and the thyristor (7) is fixed to the connecting portion (91) and is in contact with the connecting portion (91) for heat conduction.

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