Overtemperature protection structure of electric heating faucet

Abstract

The utility model belongs to the technical field of overtemperature protection structures, and particularly relates to an electric heating faucet overtemperature protection structure which comprises a manual reset temperature controller, an installation base is arranged on the inner wall of a control cavity of an electric heating faucet, the manual reset temperature controller is detachably installed on the installation base, and an installation hole is formed in the top of the installation base in a penetrating mode. The installation hole is composed of a first stepped hole, a second stepped hole and a third stepped hole, the temperature sensing end of the manual reset temperature controller is inserted into the first stepped hole, a heat conduction column is arranged in the second stepped hole, and the top end of the heat conduction column is connected with the temperature sensing end of the manual reset temperature controller in an attached mode. The bottom end of the heat conduction column penetrates out of the installation hole and extends to the position close to the connecting position of the cold end and the hot end of the electric heating pipe, an installation groove is formed in the position, corresponding to the manual reset temperature controller, of the electric heating faucet shell, an installation plate is clamped in the installation groove, and a reset hole is formed in the installation plate. According to the utility model, the temperature controller can be reset stably, and the temperature controller can sense the water temperature more accurately.

Description

Technical Field

[0001] The utility model belongs to the technical field of over-temperature protection structures, and in particular relates to an over-temperature protection structure for an electric water faucet. Background Art

[0002] The widespread use of tap water has brought convenience to people, but if you want to use hot water, you need to install a heating device, and electric water faucets are one of the most widely used. For safety reasons, electric water faucets are usually equipped with over-temperature protection devices.

[0003] Electric faucets belong to the category of instant electric water heaters. The temperature control protection methods currently used on the market are all one-time fuses or manually recoverable thermostats (without external reset structure). When the machine over-temperature protection is activated, the machine must be opened for replacement or manual reset, which requires professionals to complete. This old structure causes great trouble to users when using it.

[0004] For example, Chinese patent publication number CN220379025U discloses an upright electric water faucet with external temperature control and reset control, comprising an electric water faucet housing and a heating body, wherein the heating body is arranged upright and fixedly connected to the electric water faucet housing, the terminal block is fixedly connected to the electric water faucet housing, the upper part of a manual reset thermostat is sleeved in a groove of the terminal block and fixedly connected to the terminal block, the reset button faces downward, and a telescopic rod is provided laterally below the reset button, the head end of the telescopic rod is exposed outside the electric water faucet housing, and when the telescopic rod moves into the electric water faucet housing, the head end is lowered and the tail end is raised, and the telescopic rod moves obliquely upward to press the reset button; the utility model realizes manual external reset for the electric water faucet with an upright heating body, adopts the principle of pressing, and drives the reset action of the reset button of the thermostat by directly pressing the telescopic rod, which is simple and reliable.

[0005] However, the above structure still has many shortcomings. First, the tip of the telescopic rod is exposed outside the electric faucet housing and is easily touched by mistake. Second, the telescopic rod is used to reset the thermostat button, which is prone to wear and jamming, affecting the reset stability. Third, the thermal column is in contact with the entire heating tube and connected to the thermostat. The uneven temperature distribution of the heating tube causes the thermal column to conduct heat differently, resulting in inaccurate water temperature perception by the thermostat and unstable water outlet temperature, affecting the user experience. In addition, the thermal column is sensitive to local temperature changes, affecting the temperature control accuracy and stability. Utility Model Content

[0006] The main technical problem to be solved by the utility model is to provide an electric water faucet over-temperature protection structure with a simple structure and convenient operation, which can not only stably reset the thermostat, but also enable the thermostat to sense the water temperature more accurately, thereby avoiding the situation where the water outlet temperature is unstable due to uneven temperature of the heating tube.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] An electric water faucet over-temperature protection structure includes a manual reset thermostat, an inner wall of the electric water faucet control chamber is integrally provided with a mounting seat, the manual reset thermostat can be detachably mounted on the mounting seat, the top of the mounting seat passes through a mounting hole with a stepped structure, and the bottom end of the mounting hole passes through the bottom of the electric water faucet control chamber and is connected to the electric water faucet heating chamber, the mounting hole consists of a first stepped hole, a second stepped hole and a third stepped hole, the temperature sensing end of the manual reset thermostat is inserted into the first stepped hole, a heat conducting column is provided in the second stepped hole, the top end of the heat conducting column is fitly connected to the temperature sensing end of the manual reset thermostat, the bottom end of the heat conducting column passes through the mounting hole and extends into the heating chamber of the electric water faucet and is close to the connection between the cold end and the hot end of the electric heating tube, a mounting groove is provided on the electric water faucet shell at a position corresponding to the manual reset thermostat, a mounting plate is clamped in the mounting groove, and a reset hole is provided on the mounting plate at a position corresponding to the manual reset switch of the manual reset thermostat.

[0009] The following is a further optimization of the above technical solution by the present invention:

[0010] The inner diameters of the first stepped hole, the second stepped hole and the third stepped hole decrease in sequence.

[0011] Further optimization: the diameter of the temperature sensing end of the manual reset thermostat is larger than the inner diameter of the second stepped hole.

[0012] Further optimization: the heat-conducting column includes a column, and two retaining rings spaced a certain distance apart are integrally provided on the outer wall of the column. The diameter of the retaining ring is larger than the inner diameter of the third step hole, and the diameter of the column is smaller than the inner diameter of the third step hole.

[0013] Further optimization: the heat conducting column is made of copper material.

[0014] Further optimization: the shape and size of the reset hole are the same as the shape and size of the manual reset switch of the manual reset thermostat.

[0015] Further optimization: the manual reset switch of the manual reset thermostat is arranged in the reset hole.

[0016] Further optimization: two bolt through holes are symmetrically opened on the outer wall of the mounting plate and located on both sides of the reset hole, and a bolt through tube is integrally connected to the inner wall of the mounting plate at positions corresponding to the bolt through holes.

[0017] Further optimization: two threaded barrels are symmetrically arranged on both sides of the mounting seat, and the bolt barrels correspond to the threaded barrels in the upper and lower parts.

[0018] Further optimization: The bolt through holes are all provided with fastening bolts, and the free ends of the fastening bolts pass through the bolt through tube and the fixing holes on the manual reset thermostat in sequence and are threadedly connected with the corresponding threaded tube.

[0019] The utility model provides a stable foundation for manually resetting the thermostat by integrally setting the mounting base on the inner wall of the control cavity, preventing it from shifting due to external forces such as vibration. The detachable manner facilitates quick disassembly when the thermostat fails or needs to be replaced, eliminating the need for large-scale disassembly of the electric water faucet, saving maintenance time and costs.

[0020] The utility model inserts the temperature sensing end of the manual reset thermostat into the first stepped hole and fits and connects it with the top end of the heat-conducting column in the second stepped hole. This close contact ensures that the temperature can be quickly and accurately transmitted from the heat-conducting column to the temperature sensing end of the manual reset thermostat; at the same time, the bottom end of the heat-conducting column extends into the heating chamber of the electric water faucet and is close to the connection between the cold end and the hot end of the electric heating tube. This position is the most sensitive and critical area for temperature changes in the heating chamber, and can directly sense the actual temperature changes in the heating chamber. Therefore, when the temperature in the heating chamber rises abnormally, the heat-conducting column can quickly transmit the temperature change to the temperature sensing end of the manual reset thermostat, so that the manual reset thermostat can respond in time and start the over-temperature protection mechanism, which effectively avoids damage to the electric water faucet due to overheating and ensures the safety of users.

[0021] The utility model provides an installation groove at a corresponding position of the electric water faucet housing, into which the installation plate is clipped, and the reset hole on the installation plate corresponds to the manual reset switch of the manual reset thermostat, which is convenient for the user to manually reset and protects the switch from external interference, ensuring normal operation, while making it more convenient to disassemble and assemble the installation plate.

[0022] The utility model has a simple structure and is easy to operate. Not only can the thermostat be reset stably, but the thermostat can also sense the water temperature more accurately, thus avoiding the situation where the outlet water temperature is unstable due to uneven temperature of the heating tube.

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0025] Figure 2 A cross-sectional view of an embodiment of the present utility model;

[0026] Figure 3 This is a cross-sectional view from another angle of an embodiment of the present invention.

[0027] In the figure: 1-manual reset thermostat; 2-mounting base; 3-mounting hole; 31-first step hole; 32-second step hole; 33-third step hole; 4-thermal column; 41-column; 42-retaining ring; 5-mounting slot; 6-mounting plate; 7-reset hole; 8-bolt through hole; 9-bolt through tube; 10-threaded tube. DETAILED DESCRIPTION

[0028] like Figure 1-3 As shown, an electric faucet over-temperature protection structure includes a manual reset thermostat 1, a mounting base 2 is integrally provided on the inner wall of the electric faucet control chamber, the manual reset thermostat 1 can be detachably mounted on the mounting base 2, the top of the mounting base 2 is penetrated by a mounting hole 3 with a stepped structure, and the bottom end of the mounting hole 3 passes through the bottom of the electric faucet control chamber and is connected to the electric faucet heating chamber, the mounting hole 3 is composed of a first stepped hole 31, a second stepped hole 32 and a third stepped hole 33, the temperature sensing end of the manual reset thermostat 1 is inserted into the mounting base 2. A heat-conducting column 4 is provided in the first stepped hole 31 and the second stepped hole 32. The top of the heat-conducting column 4 is fitted and connected to the temperature-sensing end of the manual reset thermostat 1. The bottom end of the heat-conducting column 4 passes through the mounting hole 3 and extends into the heating chamber of the electric water faucet and is close to the connection between the cold end and the hot end of the electric heating tube. A mounting groove 5 is provided on the electric water faucet housing at a position corresponding to the manual reset thermostat 1. A mounting plate 6 is clamped in the mounting groove 5. A reset hole 7 is provided on the mounting plate 6 at a position corresponding to the manual reset switch of the manual reset thermostat 1.

[0029] During use, when the electric water faucet is working normally, the electric heating tube is energized and heated, and the heat is transferred to the temperature sensing surface of the manual reset thermostat 1 through the heat conducting column 4. The manual reset thermostat 1 monitors the water temperature in real time. When the water temperature is within the normal range, the manual reset thermostat 1 remains in the closed state and the electric water faucet supplies water normally.

[0030] When the electric heating tube fails, the water flow is not smooth, etc., causing the water temperature to rise abnormally, when the temperature reaches the set value of the manual reset thermostat 1, the manual reset thermostat 1 will automatically disconnect, cut off the power supply of the electric heating tube, and stop heating. At this time, the electric water faucet will stop supplying hot water to prevent the water temperature from being too high and causing a safety accident.

[0031] When the fault is eliminated, the user can press the manual reset switch through the reset hole 7 on the inner wall of the electric faucet housing to reclose the manual reset thermostat 1 and restore the normal operation of the electric faucet.

[0032] With this design, firstly, the mounting base 2 is integrally arranged on the inner wall of the control cavity, providing a stable foundation for the manual reset thermostat 1 to prevent it from shifting due to external forces such as vibration. In addition, the detachable manner facilitates quick disassembly when the thermostat fails or needs to be replaced, without the need for large-scale disassembly of the electric water faucet, saving maintenance time and cost.

[0033] Secondly, the temperature sensing end of the manual reset thermostat 1 is inserted into the first stepped hole 31 and fitly connected with the top of the heat-conducting column 4 in the second stepped hole 32. This close contact ensures that the temperature can be quickly and accurately transferred from the heat-conducting column 4 to the temperature sensing end of the manual reset thermostat 1; at the same time, the bottom end of the heat-conducting column 4 extends into the heating chamber of the electric water faucet and is close to the connection between the cold end and the hot end of the electric heating tube. This position is the most sensitive and critical area for temperature changes in the heating chamber, and can directly sense the actual temperature changes of the heating chamber. Therefore, when the temperature in the heating chamber rises abnormally, the heat-conducting column 4 can quickly transmit the temperature change to the temperature sensing end of the manual reset thermostat 1, so that the manual reset thermostat 1 responds in time and activates the over-temperature protection mechanism, effectively preventing the electric water faucet from being damaged due to overheating, and ensuring the safety of users.

[0034] Third, a mounting groove 5 is opened at the corresponding position of the electric faucet housing, and the mounting plate 6 is snapped into it. The reset hole 7 on the mounting plate 6 corresponds to the manual reset switch of the manual reset thermostat 1, which is convenient for the user to manually reset and protect the switch from external interference, ensuring normal operation, while making it easier to disassemble and assemble the mounting plate 6.

[0035] The manual reset thermostat 1 is a prior art component that can be purchased and is known to those skilled in the art. The structure and principle of the manual reset thermostat 1 can be learned by those skilled in the art from technical manuals or through conventional experimental methods.

[0036] The inner diameters of the first stepped hole 31 , the second stepped hole 32 and the third stepped hole 33 decrease in sequence.

[0037] With this design, first, the stepped hole structure with a gradually decreasing inner diameter forms a good seal between the component and the hole wall. This sealing effect is similar to a tight "plug", which can effectively prevent hot water or hot air from seeping out from the gap of the mounting hole 3. The good sealing performance can not only prevent the damage of hot water leakage to the surrounding environment and users, but also ensure the stability of the temperature and pressure inside the electric water faucet, reduce the malfunctions that may be caused by leakage, thereby extending the service life of the electric water faucet and improving its safety and reliability.

[0038] The diameter of the temperature sensing end of the manual reset thermostat 1 is larger than the inner diameter of the second stepped hole 32 .

[0039] The heat conducting column 4 includes a column body 41 , on the outer wall of which two retaining rings 42 are integrally provided. The retaining rings 42 have a diameter larger than the inner diameter of the third stepped hole 33 , and the column body 41 has a diameter smaller than the inner diameter of the third stepped hole 33 .

[0040] This design has the following advantages: first, the diameter of the temperature-sensing end of the manual reset thermostat 1 is larger than the inner diameter of the second stepped hole 32, which limits the heat transfer to the temperature-sensing end of the manual reset thermostat 1 through the top of the heat-conducting column 4, so that the manual reset thermostat 1 can obtain the accurate heating chamber temperature and improve the temperature measurement accuracy; and the temperature-sensing end of the manual reset thermostat 1 cannot enter the second stepped hole 32 due to its large diameter, avoiding contact with potential internal dangerous factors, maintaining its integrity, and ensuring long-term stable temperature perception.

[0041] Secondly, the column body 41 of the heat-conducting column 4 is smaller than the inner diameter of the third stepped hole 33 for easy insertion, and the diameter of the retaining ring 42 is larger than the inner diameter of the third stepped hole 33, so that it is stable after installation and will not be easily displaced even by external forces such as water flow impact, thereby ensuring stable heat conduction and facilitating continuous and stable temperature transfer.

[0042] Third, the temperature sensing end of the manual reset thermostat 1 and the heat-conducting column 4 are of compatible size and restrict each other, so that the temperature sensing end of the manual reset thermostat 1 cannot enter the hole where the heat-conducting column 4 is located. The retaining ring 42 of the heat-conducting column 4 limits its own displacement to prevent excessive squeezing and collision of components during installation or use, thereby avoiding damage.

[0043] Fourthly, the size difference between the temperature sensing end of the manual reset thermostat 1 and the second stepped hole 32, and the size difference between the heat conducting column 4 retaining ring 42 and the third stepped hole 33 respectively forms a good seal to prevent hot water or hot air from leaking, thereby improving the safety of the electric water faucet.

[0044] The heat-conducting column 4 is made of copper, aluminum, graphite, or silicon carbide. Preferably, the heat-conducting column 4 is made of copper.

[0045] With this design, first of all, copper material has high thermal conductivity, which can quickly transfer the heat of the electric heating tube to the temperature sensing end of the manual reset thermostat 1, ensuring that the manual reset thermostat 1 can sense temperature changes in time, improve temperature control accuracy and response speed, and prevent safety accidents caused by excessive temperature of the electric heating tube.

[0046] Secondly, the copper material has uniform heat conduction, which makes the heat evenly distributed in the heat-conducting column 4, thereby helping the manual reset thermostat 1 to fully monitor the temperature of the electric heating tube, avoid local overheating and uneven temperature, and extend the service life of the electric heating tube.

[0047] Thirdly, copper material is corrosion-resistant in humid environments and is suitable for use in electric faucets, thus extending product life.

[0048] The shape and size of the reset hole 7 are the same as those of the manual reset switch of the manual reset thermostat 1 .

[0049] With this design, firstly, when performing a manual reset operation, the user can quickly and accurately find the manual reset switch position of the manual reset thermostat 1, thereby improving the operation efficiency.

[0050] Secondly, the reset hole 7 that matches the manual reset switch of the manual reset thermostat 1 can reduce the risk of accidentally touching other parts, ensure the safety of operation, thereby reducing the possible erroneous operation caused by the mismatch between the hole and the switch, and improving the reliability of product use.

[0051] The manual reset switch of the manual reset thermostat 1 is arranged in the reset hole 7 .

[0052] This design, firstly, the presence of the reset hole 7 provides the user with a clear operating position guide. The user can trigger the manual reset switch of the manual reset thermostat 1 by simply inserting a tool (such as a toothpick or a small screwdriver) into the reset hole 7, without having to disassemble the complex shell structure of the electric faucet, thereby making the reset operation simple and direct, and even non-professionals can easily complete it.

[0053] Secondly, the manual reset switch is arranged in the reset hole 7, which is not only convenient for the user to operate when needed, but also the reset hole 7 plays a certain protective role for the manual reset switch, avoiding the switch from being triggered by accidental touch during daily use.

[0054] Thirdly, the design of the reset hole 7 allows the manual reset switch to be hidden when not in use, without damaging the overall appearance of the electric water faucet, making the surface of the electric water faucet more concise and smooth, and better integrated with the surrounding home environment.

[0055] Two bolt through holes 8 are symmetrically formed on the outer wall of the mounting plate 6 and on both sides of the reset hole 7 . Bolt through tubes 9 are integrally connected to the inner wall of the mounting plate 6 at positions corresponding to the bolt through holes 8 .

[0056] Two threaded barrels 10 are symmetrically and integrally provided on both sides of the mounting seat 2 , and the bolt barrels 9 correspond to the threaded barrels 10 in upper and lower positions.

[0057] The bolt through holes 8 are each provided with a fastening bolt (not shown in the figure), and the free end of the fastening bolt passes through the bolt through tube 9 and the fixing hole on the manual reset thermostat 1 and is threadedly connected to the corresponding threaded tube 10 in sequence.

[0058] This design, firstly, realizes multi-point fixation by setting corresponding holes on the mounting plate 6 and the mounting seat 2 and connecting them with fastening bolts. Compared with single-point fixation, it can more evenly distribute the force, prevent the mounting plate 6 and the manual reset thermostat 1 from loosening or displacement under external force during use, and ensure the long-term stability and reliability of the over-temperature protection structure.

[0059] Secondly, the tightening bolt connection method is combined with the corresponding design of the bolt tube 9 and the threaded tube 10, so that the manual reset thermostat is accurately installed, ensuring that the temperature sensing end of the manual reset thermostat 1 fits well with the heat conducting column 4, and the manual reset switch of the manual reset thermostat 1 corresponds to the reset hole 7 of the mounting plate 6, ensuring the normal operation of the thermostat and convenient operation of the user.

[0060] Third, it adopts bolt connection. During installation, maintenance personnel only need to screw the bolt through the component into the threaded barrel 10, and unscrew the bolt during disassembly. It is simple and easy to understand, does not require complex tools and special skills, improves maintenance efficiency, saves time and labor costs, and reduces the risk of operational damage.

[0061] Fourthly, the bolt connection makes each component independent. When the thermostat, mounting plate 6 or bolts are damaged, they can be replaced separately without replacing the electric water faucet or other large components as a whole, reducing maintenance costs and resource waste, and improving product economy and sustainability.

[0062] Fifth, the bolt through hole 8 is on the outer wall of the mounting plate 6, the bolt through tube 9 is on the inner wall, and the connection part is mainly inside. Excessive connection parts and bolt heads cannot be seen from the outside, keeping the product appearance neat and beautiful, reducing external erosion damage, and improving reliability and service life.

[0063] Sixth, the bolt tube 9 is integrally connected to the inner wall of the mounting plate 6 and corresponds to the threaded tube 10, making full use of the internal space, ensuring the connection strength while not taking up too much extra space, making the electric water faucet structure more compact, conducive to miniaturization and lightweight, facilitating the rational layout of other components, and improving the overall design rationality and space utilization.

[0064] For ordinary technicians in this field, based on the teachings of this utility model, without departing from the principles and spirit of this utility model, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of this utility model.

Claims

1. An electric water faucet over-temperature protection structure, comprising a manual reset thermostat (1), a mounting base (2) integrally provided on the inner wall of the electric water faucet control chamber, the manual reset thermostat (1) being detachably mounted on the mounting base (2), and characterized in that: The top of the mounting seat (2) is penetrated by a mounting hole (3) with a stepped structure, and the bottom end of the mounting hole (3) is penetrated by the bottom of the electric faucet control cavity and is connected to the electric faucet heating cavity, the mounting hole (3) is composed of a first stepped hole (31), a second stepped hole (32) and a third stepped hole (33), the temperature sensing end of the manual reset thermostat (1) is inserted into the first stepped hole (31), and a heat conducting column (4) is provided in the second stepped hole (32), and the top end of the heat conducting column (4) is connected to the heat conducting column (4). The temperature sensing end of the manual reset thermostat (1) is fitted and connected, and the bottom end of the heat-conducting column (4) passes through the mounting hole (3) and extends into the heating chamber of the electric water faucet and is close to the connection between the cold end and the hot end of the electric heating pipe. A mounting groove (5) is provided on the housing of the electric water faucet at a position corresponding to the manual reset thermostat (1), and a mounting plate (6) is clamped in the mounting groove (5). A reset hole (7) is provided on the mounting plate (6) at a position corresponding to the manual reset switch of the manual reset thermostat (1).

2. The over-temperature protection structure of an electric water faucet according to claim 1, characterized in that: The inner diameters of the first stepped hole (31), the second stepped hole (32), and the third stepped hole (33) decrease in sequence.

3. The over-temperature protection structure of an electric water faucet according to claim 2, characterized in that: The diameter of the temperature sensing end of the manual reset thermostat (1) is larger than the inner diameter of the second stepped hole (32).

4. The over-temperature protection structure of an electric water faucet according to claim 3, characterized in that: The heat-conducting column (4) includes a column (41), and two retaining rings (42) are integrally provided on the outer wall of the column (41) at a certain distance. The diameter of the retaining ring (42) is larger than the inner diameter of the third stepped hole (33), and the diameter of the column (41) is smaller than the inner diameter of the third stepped hole (33).

5. The over-temperature protection structure of an electric water faucet according to claim 4, characterized in that: The heat conducting column (4) is made of copper material.

6. The over-temperature protection structure of an electric water faucet according to claim 5, characterized in that: The shape and size of the reset hole (7) are the same as the shape and size of the manual reset switch of the manual reset thermostat (1).

7. The over-temperature protection structure of an electric water faucet according to claim 6, characterized in that: The manual reset switch of the manual reset thermostat (1) is arranged in the reset hole (7).

8. The over-temperature protection structure of an electric water faucet according to claim 7, characterized in that: Two bolt through holes (8) are symmetrically formed on the outer wall of the mounting plate (6) and located on both sides of the reset hole (7). A bolt through tube (9) is integrally connected to the inner wall of the mounting plate (6) at positions corresponding to the bolt through holes (8).

9. The over-temperature protection structure of an electric water faucet according to claim 8, characterized in that: Two threaded barrels (10) are symmetrically and integrally provided on both sides of the mounting seat (2), and the bolt barrels (9) correspond to the threaded barrels (10) in upper and lower positions.

10. The over-temperature protection structure of an electric water faucet according to claim 9, characterized in that: The bolt through holes (8) are each provided with a fastening bolt, and the free ends of the fastening bolts are sequentially passed through the bolt through tube (9), the fixing holes on the manual reset thermostat (1), and are threadedly connected to the corresponding threaded tube (10).

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