Dry-burning-resistant electric heating faucet

Abstract

The utility model discloses an electric heating faucet capable of preventing dry burning. Comprising a machine shell, a circuit board and a water outlet pipe, the circuit board and the water outlet pipe are installed on the machine shell, a pipe body and a heater are installed in the machine shell, a butt-assembling port is formed in one end of the pipe body, a faucet valve element is arranged in a pipeline at the other end of the pipe body, a water outlet of the pipe body is communicated with a water inlet of the heater, and a flow guide cylinder is detachably installed in the pipeline of the pipe body. An impeller is rotatably installed in the flow guide cylinder, blades of the impeller are magnets, an arc-shaped flow guide piece is arranged at the front end of the flow guide cylinder, a silicon controlled rectifier is arranged outside the pipe body, a Hall sensor is arranged at the position corresponding to the impeller, and an eccentric cam rotating together with the handle is arranged at the rotary connecting position of the handle and the faucet valve element. And a touch switch is arranged at the moving track of the eccentric cam. According to the utility model, multi-aspect monitoring is used, so that the problem of dry burning of the heater can be effectively avoided, and safety monitoring is carried out in combination with a plurality of temperature sensors, so that the safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric water faucets, in particular to an electric water faucet which can prevent dry boiling. Background Art

[0002] As we all know, faucet is the popular name for water valve, which is mainly used to control the size of the water flow switch and has the effect of saving water. With the continuous development of science and technology, faucets are constantly updated and iterated. Among them, electric water faucets were born.

[0003] Electric water faucets, also known as instant faucets, are efficient and quick faucets that heat water directly. However, electric water faucets must operate with water present to prevent dry-boiling. Currently, most existing electric water faucets rely solely on a single control mechanism to prevent dry-boiling. If this control mechanism malfunctions, even without water flowing, the heating command will not be triggered to stop, potentially causing dry-boiling. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a safer electric water faucet with anti-dry-burn function.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An anti-dry-burn electric water faucet comprises a casing, a circuit board and a water outlet pipe installed on the casing, a pipe body for introducing cold water and a heater with a water inlet and a water outlet installed inside the casing, the water outlet of the heater is connected to the water outlet pipe, one end of the pipe body is provided with a matching port for connecting to an external water pipe, a faucet valve core is provided in the pipeline at the other end of the pipe body, the water outlet of the pipe body is connected to the water inlet of the heater, the control end of the faucet valve core is connected to a handle placed outside the casing, and a detachable mounting hole is installed in the pipeline of the pipe body. It is equipped with a guide cylinder, an impeller is rotatably installed inside the guide cylinder, the blades of the impeller are magnets, an arc-shaped guide plate is provided at the front end of the guide cylinder, a thyristor is provided on the outside of the tube body and a Hall sensor is provided at the corresponding position of the impeller, an eccentric cam that rotates with the handle is provided at the rotating connection between the handle and the faucet valve core, and a touch switch is provided at the moving track of the eccentric cam, the heater, thyristor, Hall sensor and touch switch are all electrically connected to the circuit board, and the circuit board is connected to the mains through a power cord.

[0007] Preferably, grille plates are provided at both ends of the guide tube, the arc-shaped guide plates are placed at the grille holes of the grille plates, the inner end surface of the grille plates are provided with grooves, balls are installed in the grooves, and the shafts of the impellers touch the balls respectively, so that the impellers can rotate under the flushing of water flow.

[0008] Preferably, a hollow limiting tube is provided in the pipeline of the tube body, one end of the limiting tube is provided with mutually symmetrical openings and is in an open state, and the opened diameter is larger than the pipeline diameter of the tube body, and the limiting tube is inserted into the pipeline of the tube body from the end provided with the opening and forms a top contact with the guide tube.

[0009] Preferably, the upper half and the lower half of the heater are provided with a first thermostat and a second thermostat respectively, the first thermostat is an automatic reset thermostat, and the second thermostat is a manual reset thermostat.

[0010] Preferably, a conducting pipe is provided between the water outlet of the heater and the water inlet of the water outlet pipe.

[0011] Preferably, a temperature sensor is provided on the conducting tube, and a detection end of the temperature sensor is placed in the inner tube of the conducting tube.

[0012] Preferably, the water outlet and water inlet of the heater are both protruding outward and are covered with a soft rubber sleeve, the soft rubber sleeve is in the shape of a cone, the water inlet of the heater is connected to the water outlet of the pipe body through the soft rubber sleeve, and the water outlet of the heater is connected to the water inlet of the conducting pipe through the soft rubber sleeve.

[0013] Preferably, an insulating tube is provided inside the water outlet pipe, and the insulating tube is communicated with the water outlet of the conducting pipe.

[0014] Preferably, a display screen and a touch switch are provided on the circuit board, and a cover plate is provided on the housing at the display screen and the touch switch. The cover plate is provided as a transparent portion at the display screen, and a touch icon is provided on the cover plate at the touch switch.

[0015] Preferably, at least one pair of hooks and plug-in columns are provided on the side of the cover plate, and the casing is provided with a table and plug-in holes corresponding to the hooks and plug-in columns at the covering part of the cover plate, wherein the casing is provided with a disassembly hole at the position corresponding to the hook, and the disassembly hole is opposite to the hook.

[0016] Due to the adoption of the above-mentioned scheme, the utility model relies on the Hall sensor, impeller, eccentric cam, and touch switch to perform multi-faceted monitoring of whether the faucet is turned on for water flow, thereby effectively eliminating the problem of dry burning of the heater, and combining multiple temperature sensors for safety monitoring to improve safety; at the same time, an impeller with a magnetic field and a Hall sensor are used to confirm whether there is water flowing inside, which can not only confirm that water is passing through, but also eliminate the need to dig a detection port on the pipe body, thereby ensuring the integrated design of the pipe body and reducing the risk of water leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.

[0018] Figure 2 It is a structural explosion diagram of an embodiment of the present utility model.

[0019] Figure 3 It is a cross-sectional view of an embodiment of the present utility model.

[0020] Figure 4 It is a structural schematic diagram of the guide tube and the impeller of an embodiment of the utility model.

[0021] Figure 5 It is a structural diagram of the heater and the soft rubber sleeve of an embodiment of the utility model. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0024] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, removable connections, or integral connections. They may refer to mechanical connections or electrical connections. They may refer to direct connections or indirect connections through an intermediary, and they may refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0025] like Figures 1 to 5 As shown, the present embodiment provides an anti-dry-burn electric water faucet, comprising a casing 1 and a circuit board 2 and a water outlet pipe 3 mounted on the casing 1. A pipe body 4 for introducing cold water and a heater 5 having a water inlet and a water outlet are installed inside the casing 1. The water outlet of the heater 5 is connected to the water outlet pipe 3. One end of the pipe body 4 is provided with a matching port 6 for connecting to an external water pipe. A faucet valve core 7 is provided in the pipeline at the other end of the pipe body 4. The water outlet of the pipe body 4 is connected to the water inlet of the heater 5. The control end of the faucet valve core 7 is connected to a handle 8 placed outside the casing 1. A detachable The guide tube 9 has an impeller 10 rotatably mounted inside the guide tube 9, and the blades of the impeller 10 are magnets. The front end of the guide tube 9 is provided with an arc-shaped guide plate 11. The outside of the tube body 4 is provided with a thyristor 12 and a Hall sensor 13 is provided at the corresponding position of the impeller 10. The rotation connection between the handle 8 and the faucet valve core 7 is provided with an eccentric cam 14 that rotates together with the handle 8. A touch switch 15 is provided at the moving track of the eccentric cam 14. The heater 5, thyristor 12, Hall sensor 13 and touch switch 15 are all electrically connected to the circuit board 2, and the circuit board 2 is connected to the mains via a power cord. Among them, the heater of this embodiment can be a cast aluminum heater.

[0026] This embodiment relies on the combination of the Hall sensor 13 and the impeller 10, and the combination of the eccentric cam 14 and the touch switch 15 to achieve dual detection of whether the faucet is turned on to release water, that is, to detect whether water is flowing in the internal pipe.

[0027] The combination of the Hall sensor 13 and the impeller 10 detects the flow of water. Specifically, once the faucet valve core 7 is opened to release water, under the action of water pressure, the external water flows from the matching port 6 into the pipeline of the pipe body 4. The impeller 10 is located in the pipeline of the pipe body 4. After the water enters the pipe body 4, it basically flows along the direction of the pipeline. There is no thrust to meet the rotation of the impeller 10. Therefore, an arc-shaped guide plate 11 is set at one end of the guide tube 9 to change the direction of the incoming water and make the water have a spiral trend. As long as the water enters, it will push the impeller 10 to rotate. After the impeller 10 rotates, because the blades of the impeller 10 are magnets, the Hall sensor 13 located on the outside will detect the change in the magnetic field, and then determine that there is water flowing inside, thereby meeting the first condition for the operation of the heater 5, that is, water flowing. At the same time, the eccentric cam 14 set at the handle 8 rotates together with the handle 8. When the handle rotates in the direction of the "hot water" mark, the eccentric cam 14 is just located in this direction, and the eccentric cam 14 will form a top contact with the touch switch 15, thereby triggering the second condition for the operation of the heater 5. When both conditions are met, the circuit board 2 will give instructions to the thyristor 12, allowing the thyristor 12 to control the heater 5 to perform heating.

[0028] Furthermore, in order to make the impeller 10 rotate more smoothly, grid plates 16 are provided at both ends of the guide tube 9 of this embodiment, and the arc-shaped guide plates 11 are placed at the grid holes of the grid plates 16. The inner end surface of the grid plate 16 is provided with a groove 17, and a ball 18 is installed in the groove 17. The shaft 19 of the impeller 10 touches the ball 18 respectively to achieve point-to-face contact, so that the impeller 10 can rotate better under the flushing of water flow, which will effectively reduce friction compared to the sleeve-type rotating shaft. It should be noted that the guide tube 9 is composed of two monomers assembled in pairs.

[0029] Furthermore, when the impeller 10 or the guide tube 9 is used for a long time, some foreign matter will gradually accumulate in the impeller 10 or the guide tube 9, and when the impeller 10 is damaged, it needs to be replaced or cleaned. Therefore, the present embodiment adopts a detachable installation structure for the guide tube 9, specifically, a hollow limiting tube 20 is provided in the pipeline of the tube body 4, and one end of the limiting tube 20 is provided with mutually symmetrical openings 21 and is in an open state, and the opened diameter is larger than the pipeline diameter of the tube body 4. The limiting tube 20 is inserted into the pipeline of the tube body 4 by the end provided with the opening 21 and forms a top contact with the guide tube 9. In this way, when it needs to be disassembled, it only needs to be removed. Use a tool to hook the opening 21, and then pull it outward until the limiting tube 20 is separated from the pipeline of the tube body 4. After the limiting tube 20 is separated, the guide cylinder 9 can be taken out, and then the impeller 10 and other components can be cleaned or replaced. When it is necessary to assemble the tube body 4, first put the guide cylinder 9 in the correct direction (that is, the end with the arc-shaped guide plate 11 is facing outward). After putting it in, press the end of the limiting tube 20 with the opening 21 to press the originally open opening, and then insert it into the pipeline of the tube body 4, and then continue to push inward until a top contact is formed between the guide cylinders 9.

[0030] Furthermore, to prevent the heater 5 from heating at too high a temperature and to detect whether a dry burn has occurred, the upper and lower halves of the heater 5 of this embodiment are provided with a first thermostat 22 and a second thermostat 23, respectively. The first thermostat 22 is an automatic reset thermostat, and the second thermostat 23 is a manual reset thermostat. The detection set temperature of the automatic reset thermostat is lower than that of the manual reset thermostat. Specifically, the set temperature of the automatic reset thermostat is 70°C, while that of the manual reset thermostat is 135°C. Under normal operation, the automatic reset thermostat performs temperature detection. That is, when the heater 5 is operating, the heater 5 continues to operate if the temperature is below 70°C. When the temperature exceeds 70°C, the heater 5 stops operating, thus controlling the temperature below 70°C. Of course, if the automatic reset thermostat fails to trip, causing the temperature to exceed 70°C and continue heating until it reaches 135°C, the manual reset sensor can be used to forcibly cut off the heater, and the heater will not automatically reset. The user can only manually reset the heater after repairs are completed. This will ensure heating safety.

[0031] Furthermore, a conducting pipe 24 is provided between the water outlet of the heater 5 and the water inlet of the outlet pipe in this embodiment. A temperature sensor 25 is provided on the conducting pipe 24, and the detection end of the temperature sensor 25 is placed in the inner tube of the conducting pipe 24. In this way, the actual temperature of the discharged water can be detected in real time by the temperature sensor 25.

[0032] Furthermore, in order to ensure the sealing between the pipe openings of the components, the water outlet and water inlet of the heater 5 of this embodiment are both protruding outwards and are covered with a soft rubber sleeve 26. The soft rubber sleeve 26 is in a frustum shape. The water inlet of the heater 5 is connected to the water outlet of the pipe body 4 through the soft rubber sleeve 26, and the water outlet of the heater 5 is connected to the water inlet of the conducting pipe 24 through the soft rubber sleeve 26. In this way, the frustum-shaped soft rubber sleeve 26 can make the connection more and more dense as the connection is tightened.

[0033] Furthermore, to prevent electric shock, an insulating tube 27 is provided inside the outlet pipe 3 of this embodiment. The insulating tube 27 is connected to the water outlet of the conducting tube 24. The insulating tube 27 can be a soft rubber tube 26. Depending on the length of the insulating tube 27, an electrical isolation wall is formed inside the outlet pipe 3. This wall utilizes the electrical resistance of water (for example, the national standard stipulates that the resistivity of tap water at 15°C should be greater than 1300Ω.cm). The "electrical isolation wall" is formed by selecting the insulating tube 27, combining its diameter and distance. When powered on, even if the water in the heater 5 contains electricity, its resistance will attenuate as it passes through the "electrical isolation wall," achieving electrical isolation and ensuring that the discharged water has a near-zero voltage and a very weak current of less than 0.02mA / kw.

[0034] Furthermore, in order to facilitate users to know the specific working status and manual control work, the circuit board 2 of this embodiment is provided with a display screen 28 and a touch switch 29, and the housing 1 is covered with a cover plate 30 at the display screen 28 and the touch switch 29. The cover plate 30 is provided as a transparent part at the display screen 28, and a touch icon is provided on the cover plate 30 at the touch switch 29. In addition, in order to facilitate the maintenance or replacement of the cover 30, the side of the cover 30 of this embodiment is provided with at least one pair of hooks 31 and plug posts 32, and the casing 1 is provided with a table 33 and a plug hole 34 corresponding to the hook 31 and the plug post 32 at the covering part of the cover 30, wherein the casing 1 is provided with a disassembly hole 35 at the position corresponding to the hook 31, and the disassembly hole 35 is generally downward and the disassembly hole 35 is opposite to the hook 31. In this way, when the cover 30 needs to be disassembled, a tool can be inserted into the disassembly hole 35 to push open the overlap between the hook 31 and the table 33, so that the cover 30 can be tilted up, thereby completing the disassembly of the cover 30.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An electric water faucet with an anti-dry-burn function, characterized in that: The utility model comprises a housing, a circuit board and a water outlet pipe installed on the housing, a pipe body for introducing cold water and a heater with a water inlet and a water outlet installed inside the housing, the water outlet of the heater is connected to the water outlet pipe, one end of the pipe body is provided with a matching port for connecting to an external water pipe, a faucet valve core is provided in the pipeline at the other end of the pipe body, the water outlet of the pipe body is connected to the water inlet of the heater, the control end of the faucet valve core is connected to a handle placed outside the housing, and a guide tube is detachably installed in the pipeline of the pipe body. An impeller is rotatably installed inside the guide tube, the blades of the impeller are magnets, an arc-shaped guide plate is provided at the front end of the guide tube, a thyristor is provided on the outside of the tube body and a Hall sensor is provided at the corresponding position of the impeller, an eccentric cam that rotates together with the handle is provided at the rotating connection between the handle and the faucet valve core, and a touch switch is provided at the moving track of the eccentric cam, the heater, thyristor, Hall sensor and touch switch are all electrically connected to the circuit board, and the circuit board is connected to the mains through a power cord.

2. The anti-dry-burn electric faucet according to claim 1, characterized in that: Grille plates are provided at both ends of the guide tube, the arc-shaped guide vanes are placed at the grille holes of the grille plates, the inner end surface of the grille plates is provided with grooves, balls are installed in the grooves, and the shafts of the impellers touch the balls respectively, so that the impellers can rotate under the flushing of water flow.

3. The anti-dry-burn electric water faucet according to claim 2, characterized in that: A hollow limiting tube is provided in the pipeline of the tube body. One end of the limiting tube is provided with mutually symmetrical openings and is in an open state, and the opened diameter is larger than the pipeline diameter of the tube body. The limiting tube is inserted into the pipeline of the tube body from the end provided with the opening and forms a top contact with the guide tube.

4. The anti-dry-burn electric faucet according to claim 1, characterized in that: The upper half and the lower half of the heater are respectively provided with a first thermostat and a second thermostat, wherein the first thermostat is an automatic reset thermostat and the second thermostat is a manual reset thermostat.

5. The anti-dry-burn electric faucet according to claim 4, characterized in that: A conducting pipe is provided between the water outlet of the heater and the water inlet of the water outlet pipe.

6. The anti-dry-burn electric faucet according to claim 5, characterized in that: The conducting tube is provided with a temperature sensor, and the detection end of the temperature sensor is placed in the inner tube of the conducting tube.

7. The anti-dry-burn electric water faucet according to claim 6, characterized in that: The water outlet and water inlet of the heater are both protruding outward and are covered with a soft rubber sleeve, which is in the shape of a cone. The water inlet of the heater is connected to the water outlet of the pipe body through the soft rubber sleeve, and the water outlet of the heater is connected to the water inlet of the conducting pipe through the soft rubber sleeve.

8. The anti-dry-burn electric water faucet according to claim 7, characterized in that: An insulating tube is provided inside the water outlet pipe, and the insulating tube is communicated with the water outlet of the conducting pipe.

9. The anti-dry-burn electric water faucet according to claim 1, characterized in that: The circuit board is provided with a display screen and a touch switch. The housing is covered with a cover plate at the display screen and the touch switch. The cover plate is provided as a transparent part at the display screen, and a touch icon is provided at the touch switch.

10. The anti-dry-burn electric water faucet according to claim 9, characterized in that: At least one pair of hooks and plug-in columns are provided on the side of the cover plate, and a table and plug-in holes corresponding to the hooks and plug-in columns are provided on the casing at the covering part of the cover plate, wherein a disassembly hole is provided on the casing at the position corresponding to the hook, and the disassembly hole is opposite to the hook.

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