Overheating protection structure of electric heating faucet

Abstract

The utility model provides an overheating protection structure of an electric heating faucet. The overheating protection structure comprises a shell assembly and an electric heating pipe. 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 structure further comprises a heat conduction piece, a resettable temperature controller and a pressing piece. A through hole is formed in the bottom of the heating cavity, the heat conduction piece is inserted into the through hole and sealed with the through hole in the circumferential direction, a clamping groove is formed in the upper end of the heat conduction piece, and the heating part of the electric heating pipe is partially clamped into the clamping groove and attached to the inner wall of the clamping groove. The resettable temperature controller is arranged below the heat conduction piece, the temperature sensing end of the resettable temperature controller abuts against the lower end of the heat conduction piece, and the pressing piece is connected to the bottom of the shell assembly and used for pressing the resettable temperature controller on the heat conduction piece; according to the utility model, the assembly of the heat conduction piece and the electric heating pipe is convenient, the production cost can be reduced, and the service life of the electric heating pipe can be prevented from being shortened due to the influence of high welding temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of electric water faucets, in particular to an overheating protection structure of 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 extends out of the shell assembly. In addition, an annular convex edge is provided on the outer wall of the metal heat conductor, which abuts against the inner bottom of the heating chamber, and a sealing ring is used to perform a planar seal between the annular convex edge and the inner bottom of the heating chamber. A nut is threadedly connected to the lower end of the metal heat conductor, and the metal heat conductor is fastened to the shell assembly through the nut, and the resettable thermostat is fixed to the shell On the assembly, the temperature sensing end of the resettable thermostat abuts against and conducts heat to the lower end of the metal heat conductor; when the electric water faucet fails and causes the electric heating tube to dry out 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 influence of the high welding temperature; in addition, since the metal heat conductor needs to be fastened to the shell assembly by a nut threadedly connected to the lower end of the metal heat conductor, there are the disadvantages of troublesome fixing of the metal heat conductor and the shell assembly and low assembly efficiency. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide an overheating protection structure for an electric water faucet, which can facilitate the assembly of a heat-conducting member and an electric heating tube, reduce production costs, and prevent the electric heating tube from being affected by high welding temperatures and thus shortening its service life.

[0004] The utility model provides an overheating protection structure of an electric water faucet, comprising 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 overheating protection structure also includes a heat conducting member, a resettable thermostat and a pressing member; a through hole is provided at the bottom of the heating chamber, the heat conducting member is inserted into the through hole and is circumferentially sealed therein, a card slot is provided at the upper end of the heat conducting member, a heating portion of the electric heating tube is partially inserted into the card slot and abuts against the inner wall of the card slot; the resettable thermostat is provided below the heat conducting member, a temperature sensing end of the resettable thermostat abuts against the lower end of the heat conducting member, and the pressing member is connected to the bottom of the shell assembly and is used for pressing the resettable thermostat against the heat conducting member.

[0005] After adopting the above structure, the utility model has a slot provided on the upper end of the heat-conducting member, 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 production costs. 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 affected by the high temperature of welding and shortening its service life. 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.

[0006] In one possible embodiment, a sealing ring is embedded in the outer peripheral wall of the heat conductor, and the sealing ring is used to seal the gap between the heat conductor and the through hole; by adopting this structure, under the action of the sealing ring, the sealing ring can reliably seal the gap between the heat conductor and the through hole to prevent water in the heating chamber from leaking through the gap between the heat conductor and the through hole; in addition, under the action of the 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 flat sealing method.

[0007] In one possible embodiment, an annular convex edge is provided on the outer wall of the lower end of the heat conductor, and an annular step is provided on the inner wall of the lower end of the through hole, and the annular convex edge abuts against the annular step; by adopting this structure, after the heat conductor is inserted into the through hole from bottom to top, the annular convex edge can abut against the annular step to limit the heat conductor, thereby improving the reliability of the heat conductor after assembly.

[0008] In a possible embodiment, a pressing column is provided on the top of the pressing member below the resettable thermostat, and a rubber ring is provided between the pressing column and the resettable thermostat, and an annular reduced diameter portion is provided on the inner wall of the rubber ring and in the middle part of the axial direction of the rubber ring, the upper end of the rubber ring abuts against the lower end of the resettable thermostat, and the upper end of the pressing column is inserted into the rubber ring from bottom to top 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 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 pressing column can achieve flexible compression of the resettable thermostat, thereby preventing the resettable thermostat from being crushed; and since the upper end of the pressing 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 pressing column can be achieved.

[0009] In one possible embodiment, the pressure column is provided with an open groove with openings at the upper end and the side, and the reset end of the resettable thermostat extends into the open groove; by adopting this structure, when the resettable thermostat realizes overheating 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.

[0010] In a possible embodiment, the overheating protection structure 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 number 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0012] Figure 2 It is a schematic diagram of a partially exploded three-dimensional structure of the utility model;

[0013] Figure 3 This is a schematic cross-sectional view of the utility model;

[0014] Figure 4 for Figure 3 The schematic diagram of the structure after enlarging A in the middle;

[0015] Figure 5This is a schematic diagram of the three-dimensional structure after the heat conductor and the electric heating tube are assembled. DETAILED DESCRIPTION

[0016] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art may adjust them as needed to suit specific application scenarios.

[0017] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0018] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "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," and "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.

[0019] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] See also Figure 1-5 As shown, the embodiment of the present application discloses an overheating protection structure of an electric water faucet, including a shell assembly 1 and an electric heating tube 2; a heating chamber 11 is provided inside the shell assembly 1, and the electric heating tube 2 is provided inside the heating chamber 11 and fixed to the shell assembly 1; the overheating protection structure also includes a heat conductor 3, a resettable thermostat 4 and a pressing member 5; a through hole 12 is provided at the bottom of the heating chamber 11, the heat conductor 3 is inserted into the through hole 12 and is circumferentially sealed through the through hole 12, and a card slot 31 is provided at the upper end of the heat conductor 3, and the heating part of the electric heating tube 2 is partially inserted into the card slot 31 and is attached to the inner wall of the card slot 31; the resettable thermostat 4 is provided below the heat conductor 3, and the temperature sensing end of the resettable thermostat 4 is abutted against the lower end of the heat conductor 3, and the pressing member 5 is connected to the bottom of the shell assembly 1 and is used to press the resettable thermostat 4 onto the heat conductor 3.

[0021] After adopting the above structure, the utility model has a slot provided at the upper end of the heat-conducting member, so that the heating part 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 production costs. 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 affected by the high temperature of welding and shortening its service life. In addition, since the heating part 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 (the heating part of the electric heating tube can be connected to the two side walls of the slot and the inner bottom of the slot to increase the contact area), 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.

[0022] A sealing ring 6 is embedded on the outer peripheral wall of the heat conductor 3, and the sealing ring 6 is used to seal the gap between the heat conductor 3 and the through hole 12; after adopting this structure, under the action of the sealing ring, the sealing ring can reliably seal the gap between the heat conductor and the through hole to prevent water in the heating chamber from leaking through the gap between the heat conductor and the through hole; in addition, under the action of the 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 flat sealing method.

[0023] An annular convex edge 32 is provided on the outer wall of the lower end of the heat conductor 3, and an annular step 13 is provided on the inner wall of the lower end of the through hole 12, and the annular convex edge 32 abuts against the annular step 13; by adopting this structure, after the heat conductor is inserted into the through hole from bottom to top, the annular convex edge can abut against the annular step to limit the heat conductor, thereby improving the reliability of the heat conductor after assembly.

[0024] A pressing column 51 is provided on the top of the pressing member 5 below the resettable thermostat 4, and a rubber ring 7 is provided between the pressing column 51 and the resettable thermostat 4. An annular reduced diameter portion 71 is provided on the inner wall of the rubber ring 7 and in the middle part of the axial direction of the rubber ring 7. The upper end of the rubber ring 7 abuts against the lower end of the resettable thermostat 4, and the upper end of the pressing column 51 is inserted into the rubber ring 7 from bottom to top and abuts against the annular reduced diameter portion 71; 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 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 pressing column can achieve flexible compression of the resettable thermostat, thereby preventing the resettable thermostat from being crushed; and since the upper end of the pressing 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 pressing column can be achieved.

[0025] The pressing column 51 is provided with an open groove 52 with openings at the upper end and the side, and the reset end 41 of the resettable thermostat 4 extends into the open groove 52; 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.

[0026] The overheating protection structure also includes a contact bracket 8, which is located below the clamping piece 5. The contact bracket 8 is fixed to the bottom of the shell assembly 1 by a number of screws distributed circumferentially at intervals and is used to press the clamping piece 5 on 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 press the clamping piece on the bottom of the shell assembly, that is, after the electric shock bracket is fixed to the shell assembly, the clamping piece can be naturally pressed on the bottom of the shell assembly, thereby having the advantage of convenient fixation of the clamping piece, that is, the advantage of convenient connection between the clamping piece and the shell assembly.

[0027] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An overheating protection structure for an electric water faucet, comprising a housing assembly (1) and an electric heating tube (2); a heating chamber (11) is provided inside the housing assembly (1), and the electric heating tube (2) is provided inside the heating chamber (11) and fixed to the housing assembly (1); characterized in that: The overheat protection structure further comprises a heat conducting member (3), a resettable thermostat (4) and a pressing member (5); a through hole (12) is provided at the bottom of the heating chamber (11), the heat conducting member (3) is inserted into the through hole (12) and is circumferentially sealed with the through hole (12), a card slot (31) is provided at the upper end of the heat conducting member (3), the heating portion of the electric heating tube (2) is partially inserted into the card slot (31) and is in contact with the inner wall of the card slot (31); the resettable thermostat (4) is provided below the heat conducting member (3), the temperature sensing end of the resettable thermostat (4) is in contact with the lower end of the heat conducting member (3), and the pressing member (5) is connected to the bottom of the housing assembly (1) and is used to press the resettable thermostat (4) onto the heat conducting member (3).

2. The overheat protection structure of the electric water faucet according to claim 1, characterized in that: A sealing ring (6) is embedded on the outer peripheral wall of the heat-conducting member (3), and the sealing ring (6) is used to seal the gap between the heat-conducting member (3) and the through hole (12).

3. The overheat protection structure of the electric water faucet according to claim 1 or 2, characterized in that: An annular convex edge (32) is provided on the outer wall of the lower end of the heat conducting member (3), and an annular step (13) is provided on the inner wall of the lower end of the through hole (12), and the annular convex edge (32) abuts against the annular step (13).

4. The overheat protection structure of the electric water faucet according to claim 1, characterized in that: A pressing column (51) is provided on the top of the pressing member (5) below the resettable thermostat (4), a rubber ring (7) is provided between the pressing column (51) and the resettable thermostat (4), an annular diameter reduction portion (71) is provided on the inner wall of the rubber ring (7) and in the middle of the axial direction of the rubber ring (7), the upper end of the rubber ring (7) abuts against the lower end of the resettable thermostat (4), and the upper end of the pressing column (51) is inserted into the rubber ring (7) from bottom to top and abuts against the annular diameter reduction portion (71).

5. The overheat protection structure of the electric water faucet according to claim 4, characterized in that: The top pressure column (51) is provided with an opening groove (52) with an upper end and a side opening, and the reset end (41) of the resettable thermostat (4) extends into the opening groove (52).

6. The overheat protection structure of the electric water faucet according to claim 1, characterized in that: The overheat protection structure further comprises a contact bracket (8), wherein the contact bracket (8) is located below the pressing member (5), and the contact bracket (8) is fixed to the bottom of the housing assembly (1) by a plurality of screws distributed at circumferential intervals and is used to press the pressing member (5) onto the bottom of the housing assembly (1).

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