Electric connector

Abstract

The utility model relates to an electric connector, comprising an upper connector, the upper connector is provided with a plurality of lead-out electrodes used for realizing an electric connection function, and the plurality of lead-out electrodes comprise a ground wire lead-out electrode, a live wire lead-out electrode, a zero wire lead-out electrode, a first lead-out electrode and a second lead-out electrode. The upper connector is connected with two groups of water level detection electrodes which are arranged at intervals, one water level detection electrode is electrically connected to the first lead-out electrode through a water level input signal line, and the other water level detection electrode is electrically connected to the second lead-out electrode through a water level output signal line; the two groups of water level detection electrodes are communicated through a water body to form a water level detection loop; according to the electric connector, one electrode in a water level detection circuit does not need to be led out through a ground wire, it is guaranteed that the water level detection circuit is completely separated from the ground wire, the safety of electric heating equipment is improved, and the safety requirement is met.

Description

Technical Field

[0001] This utility model relates to the field of electrical connectors, specifically an electrical connector. Background Technology

[0002] Currently, existing modular water supply structures, such as the Chinese patent document CN202220241523.5 entitled "A Modular Water Supply Structure with Integrated Probe Combination," mainly include a water inlet pipe structure for mounting on a coupler. The water inlet pipe structure is equipped with a thermistor and a water level detection element. The thermistor and the water level detection element are electrically connected to the terminal block through their leads. In actual use, when detecting the water level, the water level detection element can only serve as one pole in the water level detection circuit, while the other pole is generally implemented using a heating plate. Therefore, the modular water supply structure must be installed on the heating plate for use, with water acting as a conductive medium to connect the heating plate and the water level detection element, thereby forming a water level detection loop.

[0003] However, in this design, the heating plate is connected to a conductive ring on the coupler as a ground wire. Therefore, due to the limitation on the number of conductive rings on the coupler, one pole in the water level detection circuit can only be led out using the ground wire. However, this method will affect the electrical safety of the electric heating equipment and does not meet current safety regulations. In addition, silicone is mainly used as an insulator between the modular water supply structure and the heating plate to prevent the steel cover of the modular water supply structure from connecting with the heating plate and to provide insulation. However, after boiling water in hot water for a long time, scale will form, which can easily cause the steel cover to connect with the heating plate, resulting in the failure of water level control. Unless the creepage path is made more than 8mm, this method will make the appearance of the appliance more unsightly and will not be conducive to sales. Therefore, the electrical connector needs to be further improved. Utility Model Content

[0004] The purpose of this invention is to solve the aforementioned problems and provide an electrical connector with a simple and reasonable structure, the main function of which is to improve the safety of the electrical connector.

[0005] An electrical connector includes an upper connector with multiple terminals for electrical connection. The terminals include a ground terminal, a live terminal, a neutral terminal, a first terminal, and a second terminal. Two sets of water level detection terminals are connected to the upper connector at intervals. The two sets of water level detection terminals are electrically connected to the first terminal and the second terminal via water level input signal lines and water level output signal lines, respectively. The two sets of water level detection terminals are connected by water to form a water level detection loop for water level detection.

[0006] The objective of this utility model can also be achieved by the following technical measures:

[0007] As a more specific embodiment, the upper connector includes an upper connecting seat, on which a central mounting channel is provided. An insulating valve core is modularly assembled and connected within the central mounting channel. An axial water inlet channel is provided within the insulating valve core. The two sets of water level detection electrodes are fixed on the insulating valve core.

[0008] As a further embodiment, the top surface of the insulating valve core extends with an insulating barrier wall, which is spaced between two sets of water level detection electrodes.

[0009] As a further embodiment, an elastic cover is connected to the top of the insulating valve core, and the elastic cover elastically covers the upper side of the water inlet channel.

[0010] As a further embodiment, the top surface of the insulating valve core has two insulating bosses that are arranged opposite to the water inlet channels. At least part of the water level detection electrode is integrally injection molded into the insulating bosses, and the other part extends out of the upper side of the insulating bosses and is exposed to form a detection end.

[0011] As a further embodiment, the upper connector is also provided with a third output terminal, and the upper connector or insulating valve core is provided with a thermistor. The input terminal of the thermistor is electrically connected to the third output terminal through a temperature sensing input signal line, and the output terminal of the thermistor is electrically connected to the first output terminal through a temperature sensing output signal line.

[0012] As a further embodiment, the insulating valve core is provided with a first conductive terminal piece, a second conductive terminal piece, and a third conductive terminal piece, wherein one water level detection electrode is electrically connected to a second output electrode through the first conductive terminal piece, and the other water level detection electrode is electrically connected to the first output electrode through the second conductive terminal piece.

[0013] As a further embodiment, the insulating valve core is provided with an isolation chamber separated from the water inlet channel. The thermistor is installed in the isolation chamber, and the temperature sensing input signal line of the thermistor is connected to the third conductive terminal piece. The third conductive terminal piece is electrically connected to the third output electrode, and the temperature sensing output signal line of the thermistor is connected to the second conductive terminal piece.

[0014] As a further embodiment, the water level detection electrode is integrally made of conductive material. At least part of the front half of the conductive material is integrally injection molded into the insulating valve core and the insulating boss, and respectively forms the water level input signal line and the water level output signal line. The rear half of the conductive material extends out of the insulating valve core and respectively forms the first conductive terminal piece and the second conductive terminal piece.

[0015] As a further embodiment, the upper connector also includes a metal connecting plate, which is installed on the upper side of the upper connector seat. A live wire anti-dry burning switch and a neutral wire anti-dry burning switch are also provided between the upper connector seat and the metal connecting plate. The bottom of the upper connector seat is provided with a coupling cavity, and the coupling cavity is provided with concentric but different diameter wires.

[0016] The first conductive ring forms the ground wire outlet, and the metal connecting plate is electrically connected to the first conductive ring.

[0017] The second conductive ring and the third conductive ring respectively constitute the live wire outlet and the neutral wire outlet. The live wire anti-dry burning switch and the neutral wire anti-dry burning switch are electrically connected to the second conductive ring and the third conductive ring respectively.

[0018] The fourth conductive ring forms the first output electrode. The output terminal of the thermistor is electrically connected to the fourth conductive ring through a temperature sensing output signal line. One of the water level detection electrodes is linearly electrically connected to the fourth conductive ring through a water level output signal.

[0019] The fifth conductive ring forms the second output electrode, and another water level detection electrode is electrically connected to the fifth conductive ring through the water level input signal line;

[0020] The sixth conductive ring forms the third output terminal, and the input terminal of the thermistor is electrically connected to the sixth conductive ring through the temperature sensing input signal line.

[0021] As a further solution, a lower connector is also included. The lower connector is provided with a ground wire connection terminal, a live wire connection terminal, a neutral wire connection terminal, a first connection terminal, a second connection terminal, and a third connection terminal that are electrically connected to the terminals of the upper connector. The first connection terminal branches out a low water level output terminal and a temperature output terminal. The second connection terminal, the third connection terminal, the low water level output terminal, and the temperature output terminal are each connected to the MCU circuit outside the lower connector.

[0022] As a further embodiment, the lower connector includes a lower connector base with several concentric coupling grooves of different diameters. The coupling grooves are coupled and plugged into each conductive ring on the upper connector. Each coupling groove is provided with a conductive spring contacting each conductive ring. The terminal of the conductive spring corresponding to the fourth conductive ring is externally connected to a tap terminal, which forms a low water level output terminal and a temperature output terminal.

[0023] The beneficial effects of this utility model are as follows:

[0024] This utility model provides an electrical connector that forms a positive and a negative electrode through two sets of water level detection electrodes, thereby creating a closed-loop water level detection circuit on the electrical connector.

[0025] Furthermore, the negative terminal of the water level detection circuit is connected to the same level as the thermistor, so that one of the terminals in the water level detection circuit does not need to be led out from the ground wire. This ensures that the water level detection circuit is completely separated from the ground wire, improves the safety of the electric heating equipment, and meets the safety regulations.

[0026] Moreover, the design of the positive and negative electrodes for water level detection ensures that the creepage path between them is more than 8mm. Even if water is boiled in hot water for a long time and scale is produced, it will not cause the water level control to fail. Attached Figure Description

[0027] Figure 1 This is an exploded view of the upper and lower connectors in this utility model.

[0028] Figure 2 This is an exploded view of the upper connector in this utility model.

[0029] Figure 3 This is a schematic diagram of the structure of the insulating valve core in this utility model.

[0030] Figure 4 This is a schematic cross-sectional view of the insulating valve core in this utility model. Figure 1 .

[0031] Figure 5 This is a top view structural diagram of the insulating valve core in this utility model.

[0032] Figure 6 This is a schematic diagram of the insulating valve core in this utility model from a bottom view.

[0033] Figure 7 This is a schematic diagram of the distribution structure of each conductive ring in this utility model.

[0034] Figure 8 This is an exploded view of the lower connector in this utility model.

[0035] Figure 9 This is a schematic diagram showing the fit between the water inlet cover and the insulating valve core in this utility model.

[0036] Figure 10 This is a schematic diagram of the water inlet cover structure in this utility model.

[0037] Figure 11 This is a schematic cross-sectional view of the insulating valve core in this utility model. Figure 2 .

[0038] Figure 12 This is a schematic diagram of the electrical connection circuit in Embodiment 2 of this utility model.

[0039] Figure 13This is a schematic diagram of the connection structure between each signal line and each conductive terminal piece in this utility model.

[0040] Figure 14 This is a schematic diagram of the disassembled terminal structure in this utility model.

[0041] Figure 15 This is a schematic diagram of the insulating valve core structure in Embodiment 3 of this utility model.

[0042] Figure 16 This is a schematic cross-sectional view of the insulating valve core in Embodiment 3 of this utility model.

[0043] Figure 17 This is a schematic cross-sectional view of the insulating valve core and elastic umbrella cover in Embodiment 4 of this utility model.

[0044] Figure 18 This is a schematic diagram of the electrical connection circuit in Embodiment 5 of this utility model. Detailed Implementation

[0045] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example 1

[0046] refer to Figures 1 to 12 As shown, an electrical connector includes an upper connector U1. The upper connector U1 is provided with multiple terminals for realizing electrical connection functions. The multiple terminals include a ground terminal a1, a live terminal a2, a neutral terminal a3, a first terminal a4, and a second terminal a5. The upper connector U1 is connected to two sets of water level detection terminals 1 arranged at intervals. The two sets of water level detection terminals 1 are electrically connected to the first terminal a4 and the second terminal a5 respectively through a water level input signal line D1 and a water level output signal line D3. The two sets of water level detection terminals 1 are connected by water to form a water level detection loop for realizing the water level detection function. Through the above-mentioned water detection loop, the reliability detection of the water level of the electric heating appliance is realized, and the detection accuracy requirement is met.

[0047] The electrical connector forms a positive and negative pole through two sets of water level detection poles 1, which can form a closed-loop water level detection circuit on the electrical connector. This eliminates the need for one pole in the water level detection circuit to be led out externally through a ground wire, ensuring that the water level detection circuit is completely separated from the ground wire, improving the safety of the electric heating equipment, and meeting safety regulations.

[0048] In this embodiment, the water level input signal line D1 and the water level output signal line D3 are the low water level input signal and the low water level output signal, respectively, and the low water level detection function is realized through the low water level input signal and the low water level output signal.

[0049] During use, the water in the electric kettle simultaneously immerses the detection terminals 2 of the two sets of water level detection electrodes. The water acts as a medium to form a circuit between the two sets of water level detection electrodes. The MCU circuit determines that the water level is not low and does not add water to the electric kettle. When the water level is lower than the water level detection electrodes, preventing the two sets of water level detection electrodes from forming a circuit using the water, the MCU circuit determines that the water level is low and automatically adds water to the electric kettle or stops heating.

[0050] The upper connector U1 includes an upper connector 4, which has a central mounting channel. An insulating valve core 5 is modularly assembled and connected in the central mounting channel 401. An axial water inlet channel 502 is provided in the insulating valve core 5. The two sets of water level detection electrodes 1 are fixed on the insulating valve core 5. This structure enables the insulating valve core 5 to have a bottom water inlet function.

[0051] The insulating valve core 5 is easy to install and disassemble. It can be manufactured and assembled independently of the upper connector U1 of the thermostat. The insulating valve core 5 is made of plastic. The two sets of water level detection electrodes are fixed by the plastic insulating valve core 5, which makes the creepage path between them longer than that of the prior art. Plastic is not easy to form scale and is easy to install. The creepage path is greater than 8mm, so even if water is boiled in hot water for a long time and scale is formed, it will not cause the water level control to fail.

[0052] An insulating baffle 54 extends from the top surface of the insulating valve core. The insulating baffle 54 is spaced between the two sets of water level detection electrodes 1. In this embodiment, the insulating baffle 54 is higher than the insulating boss 55. The insulating baffle 54 can increase the creepage distance between the water level detection electrodes, making the water level detection more accurate and ensuring that it will not fail.

[0053] The top surface of the insulating valve core 5 has two insulating bosses 55 integrally extended from opposite sides of the water inlet channel 502. At least part of the water level detection electrode 1 is integrally injection molded into the insulating bosses 55, and the other part extends out of the upper side of the insulating bosses 55 and is exposed to form the detection end 2. The insulating bosses 55 can raise the height of the detection end 2 of the water level detection electrode 1. Even if scale accumulates on the top surface of the insulating valve core 5 after use, the two sets of water level detection electrodes 1 will not be connected for a long time due to scale, which would cause the water level detection to fail.

[0054] The insulating valve core 5 is provided with a first conductive terminal piece 51 and a second conductive terminal piece 52. One water level detection electrode 1 is electrically connected to the second output electrode a5 through the first conductive terminal piece 51, and the other water level detection electrode 1 is electrically connected to the first output electrode a4 through the second conductive terminal piece 52.

[0055] The water level detection electrode 1 is integrally made of conductive material. At least part of the front half of the conductive material is integrally injection molded into the insulating valve core 5 and the insulating boss 55, and respectively forms the water level input signal line D1 and the water level output signal line D3. The rear half of the conductive material extends out of the outside of the insulating valve core 5 and respectively forms the first conductive terminal piece 51 and the second conductive terminal piece 52.

[0056] By using bent conductive material to simultaneously form the detection terminal 2, the water level input signal line D1 or the water level output signal line D3, and the first conductive terminal piece 51 or the second conductive terminal piece 52, the structure can be simplified, production is more convenient, and the cost is low. Moreover, the injection molding integrated connection can improve production efficiency while making the connection between the two sets of water level detection electrodes more secure and the overall integrity better, preventing issues such as loose leads.

[0057] The detection ends 2 of the other two sets of water level detection electrodes 1 are arranged parallel to each other relative to a line of symmetry, and the two detection ends 2 are staggered along the extension direction of the line of symmetry (see reference). Figure 5 (as shown in the figure). This structure ensures that the water level detection electrode 1 maintains the maximum safe interval distance.

[0058] The insulating valve core 5 includes a water inlet seat 56, and a water inlet pipe 57 extending downward from the center of the water inlet seat 56 to form a water inlet channel 502. A check valve assembly 6 for switching on and off the water inlet channel 502 is installed inside the water inlet pipe 57.

[0059] In this practical solution, the check valve assembly 6 includes a connecting frame 61, a spring 62, a steel ball cover 63, a leak-proof steel ball 64, and a leak-proof sleeve 65. The upper end of the steel ball cover 63 is provided with a positioning cavity 621 for accommodating one end of the spring 62, and the lower end is provided with a steel ball groove 622 for adapting to the leak-proof steel ball 64. The two ends of the spring 62 abut against the connecting frame 61 and the steel ball cover 63. The leak-proof sleeve 65 is sealed at the bottom port of the water inlet pipe 57 and is provided with a water inlet channel 651. The upper part of the leak-proof sleeve 65 is provided with an inclined end face 652 that is inclined towards the water inlet channel 651. The leak-proof steel ball 64 is placed on the inclined end face 652 and seals the water inlet channel 651 under the action of the steel ball pressure cover 63 and the spring 62. When water is added, the water pressure pushes the leak-proof steel ball 64 to compress the spring 62. When water is stopped, the steel ball 64 presses against the inclined end face 652 under the action of the spring 62 and the weight of the leak-proof steel ball 64 to seal the water inlet channel 651.

[0060] The top surface of the water inlet seat 56 is provided with several radially extending partition grooves 561. A partition 562 is formed between two adjacent partition grooves 561. The two sets of water level detection electrodes are set on different partitions 562. The partition grooves 561 act as a water curtain. The partition grooves 561 help to drain the water accumulated on the top surface of the insulating valve core 5, or they can isolate the water to prevent the water from connecting to the steel cover 21 made of metal material described below.

[0061] The bottom surface of the water inlet seat 56 is provided with a terminal piece positioning groove 563, and a riveting protrusion 564 is provided in the terminal piece positioning groove 563. The third conductive terminal piece 53 is provided with a positioning through hole 531 corresponding to the riveting protrusion 564. The third conductive terminal piece 53 is positioned in the terminal piece positioning groove 563 through the positioning through hole 531 and the riveting protrusion 564.

[0062] The terminal block positioning groove 563 not only helps workers assemble conductive terminal blocks, but also separates each conductive terminal block, reducing creepage problems between conductive terminal blocks and reducing interference.

[0063] The upper connector U1 also includes a metal connecting plate 7, which is installed on the upper side of the upper connector 4. A live wire anti-dry burning switch 8 and a neutral wire anti-dry burning switch 9 are also provided between the upper connector 4 and the metal connecting plate 7. The bottom of the upper connector 4 is provided with a coupling cavity 402, which contains concentric but different diameter wires.

[0064] The first conductive ring 10 forms a ground wire outlet a1, and the metal connecting plate 7 is electrically connected to the first conductive ring 10.

[0065] The second conductive ring 11 and the third conductive ring 12 respectively constitute the live wire outlet a2 and the neutral wire outlet. The live wire anti-dry burning switch 8 and the neutral wire anti-dry burning switch 9 are electrically connected to the second conductive ring 11 and the third conductive ring 12 respectively.

[0066] The fourth conductive ring 13 forms the first output electrode a4, wherein a water level detection electrode 1 is electrically connected to the fourth conductive ring 13 through the water level output signal line D3;

[0067] The fifth conductive ring 14 forms the second output electrode a5, and another water level detection electrode 1 is electrically connected to the fifth conductive ring 14 through the water level input signal line D1.

[0068] The aforementioned live wire anti-dry-burning switch 8 and neutral wire anti-dry-burning switch 9 are connected in series with the live wire or the neutral wire, and the live wire anti-dry-burning switch 8 and the neutral wire anti-dry-burning switch 9 mainly include moving contact pieces and stationary contact pieces that elastically contact each other. In addition, a bimetallic strip 16 (as an anti-dry-burning element) is provided on the metal connecting plate 7 for each moving contact piece, and an insulating rod 17 is provided between the bimetallic strip 16 and the moving contact piece, so that the electrical connector has a dual anti-dry-burning function.

[0069] It also includes a lower connector U2, which has a ground wire access pole b1, a live wire access pole b2, a neutral wire access pole b3, a first access pole b4 and a second access pole b5 that are electrically connected to the respective terminals of the upper connector U1. The first access pole b4 and the second access pole b5 are each connected to the MCU circuit outside the lower connector U2.

[0070] The lower connector U2 includes a lower connector 18, on which several concentric coupling grooves 181 of different diameters are formed. The coupling grooves 181 are coupled and plugged into each conductive ring on the upper connector U1, and each coupling groove 181 is provided with a conductive spring 19 that contacts each conductive ring.

[0071] The insulating valve core 5 also includes a steel cover 21, which is nested on the top of the water inlet seat 56 and its inner cavity forms a water outlet cavity 503. The detection ends 2 of the two sets of water level detection electrodes 1 are placed in the water outlet cavity 503. Several drain ports 211 are circumferentially opened on the side wall of the steel cover 21. The bottom edge height of the drain port 211 is close to that of the partition groove 561. The steel cover 21 can block the water flow sprayed upward from the water inlet channel 502, so that the water can slowly flow into the kettle body through the drain port 211.

[0072] The top wall of the steel cover 21 is provided with at least one open bubble outlet 212 located above the water outlet cavity 503; the bubble outlet 212 is located on the top wall of the steel cover 21 so as to follow the direction of the rising of small bubbles, so that the small bubbles cannot adhere to the bottom surface of the top wall and increase the speed of small bubble discharge.

[0073] A water-blocking cover 213 is provided above the bubble outlet 212. The water-blocking cover 213 has several support plates 214 evenly distributed around it and connected to the top wall of the steel cover 21. A lateral bubble discharge slit 215 is formed between the water-blocking cover 213 and the top wall of the steel cover 21, which communicates with the bubble outlet 212. The bubble outlet 212 and the bubble discharge slit 215 serve the functions of water outlet, water inlet, and bubble discharge. Example 2

[0074] refer to Figures 11 to 14 As shown, the upper connector U1 is also provided with a third output terminal a6, and the upper connector 4 or insulating valve core 5 is provided with a thermistor 3. The input terminal of the thermistor 3 is electrically connected to the third output terminal a6 through the temperature sensing input signal line D2, and the output terminal of the thermistor 3 is electrically connected to the first output terminal a4 through the temperature sensing output signal line D3.

[0075] In Embodiment 2, the temperature sensing input signal line D2 and the temperature sensing output signal line D4 realize the water temperature detection function, which enables the thermistor 3, the two sets of water level detection electrodes and the insulating valve core 5 to be combined into an installation module, making the heating plate surface of the electric kettle cleaner and simpler, and keeping it as flat as possible; while the water level detection circuit and the temperature detection circuit use weak current output, so that the two do not interfere with each other during use.

[0076] Correspondingly, the insulating valve core 5 is also provided with a third conductive terminal piece 53. The insulating valve core 5 is provided with an isolation cavity 501 that is separated from the water inlet channel 502. The thermistor 3 is installed in the isolation cavity 501. The temperature sensing input signal line D2 of the thermistor 3 is connected to the third conductive terminal piece 53. The third conductive terminal piece 53 is electrically connected to the third output terminal a6. The temperature sensing output signal line D3 of the thermistor 3 is connected to the second conductive terminal piece 52.

[0077] In addition, such as Figure 7 As shown, a sixth conductive ring 15 is also provided in the coupling cavity 402, which constitutes the third output electrode a6. The input terminal of the thermistor 3 is electrically connected to the sixth conductive ring 15 through the temperature sensing input signal line D2, and the output terminal of the thermistor 3 is electrically connected to the fourth conductive ring 13 through the temperature sensing output signal line D3.

[0078] Meanwhile, in Embodiment 2, the lower connector U2 is also provided with a third input terminal b6 electrically connected to the third output terminal a6. The first input terminal b4 branches out a low water level output terminal b41 and a temperature output terminal b42. The low water level output terminal b41 and the temperature output terminal b42 are each connected to the MCU circuit outside the lower connector U2.

[0079] This structure allows the upper connector U1 and the lower connector U2 to be separated, and is mainly used in couplers. In addition, the low water level signal and the temperature signal are output on the same line through the first output terminal a4 and the first input terminal b4, but are connected to the MCU circuit through the low water level output terminal b41 and the temperature output terminal b42 respectively, so that independent low water level detection loop and temperature detection loop can be formed, and different signal sources can still be distinguished.

[0080] Among them, the terminal of the conductive spring 19 corresponding to the fourth conductive ring 13 is externally connected to a tap terminal 20, and a low water level output terminal b41 and a temperature output terminal b42 are formed on the tap terminal 20.

[0081] The tap terminal 20 includes a first terminal piece 201 and a second terminal piece 202. The first terminal piece 201 includes a first base 2011. The first base 2011 is provided with a first electrode connection part 2012 for connecting with the conductive spring piece 19 of the fourth conductive ring 13. One end of the first base 2011 is provided with a first cable crimping part 2013, which forms a water level output terminal b41. The first cable crimping part 2013 crimps the lead wire connected to the circuit control board (MCU circuit). One end of the first base 2011 is also bent with an electrode connection piece 2014.

[0082] The second terminal piece 202 includes a second base 2021. The second base 2021 is provided with a second electrode connection part 2022 for connection with the electrode connection piece 2014. One end of the second base 2021 is provided with a second cable crimping part 2023. The second cable crimping part 2023 forms a temperature output terminal b42. The second cable crimping part 2023 crimps the lead wire connected to the circuit control board (MCU circuit).

[0083] In addition, at least part of the second conductive terminal piece 52 is exposed (not injection molded into the insulating valve core 5), and a wire clamp 521 is provided at the exposed position. The other lead of the thermistor 3 is clamped to the wire clamp 521, so that it is connected to the second conductive terminal piece 52. This structure enables the assembly of the thermistor 3 to be fully automated. Example 3

[0084] The main difference between Example 3 and Example 1 lies in one of the water level detection electrodes 1 on the insulating valve core 5, as shown in the reference. Figure 15 and Figure 16 As shown, the water level detection electrode 1 includes a metal probe 23. The upper part of the metal probe 23 extends out of the upper side of the insulating valve core 5 to form a detection end 2. The insulating valve core 5 has a mounting hole 504. The lower part of the metal probe 23 is connected to the mounting hole 504 and is fitted with a silicone sleeve 24, which separates the lower half of the silicone sleeve 24 from the insulating valve core 5. The upper half of the silicone sleeve 24 forms an insulating boss 55, and the silicone sleeve 24 has a limiting flange 241 that cooperates with the upper and lower ends of the mounting hole 504. The bottom end of the metal probe 23 is connected to a second conductive terminal piece 52. The fixing method of the second conductive terminal piece 52 can be referred to the third conductive terminal piece 53.

[0085] In addition, in Embodiment 3, the top surface of the insulating valve core 5 is further extended with a retaining ring 58 surrounding the edge (preferably the height of the retaining ring 58 is lower than that of the silicone sleeve 24, the insulating boss 55 and the drain outlet 211). The retaining ring 58 and the steel cover 21 form a gap or interference fit, which can increase the fixing area of ​​the steel cover 21 and make the installation more secure. Furthermore, the retaining ring 58 has a notch 581 at the position corresponding to the water level detection pole. When pouring water, the notch 581 helps to pour out the water accumulated on the top surface of the insulating valve core 5. The retaining ring 58 with this structure can also be used in Embodiment 1. Example 4

[0086] Example 4 can be improved upon any of Examples 1 to 3, specifically as follows: Refer to Figure 17 As shown, the top of the insulating valve core 5 is connected to an elastic umbrella cover 25, and the root of the elastic umbrella cover 25 is connected to the connecting frame 61. The elastic umbrella cover 25 elastically covers the upper side of the water inlet channel 502. Meanwhile, in this embodiment, the insulating baffle wall 54 structure is omitted. This structure uses the elastic umbrella cover 25 to enable the insulating valve core 5 to prevent secondary reverse flow. Example 5

[0087] Example 5 differs from Example 1 in that: (Refer to...) Figure 18 As shown, it also includes a high water level detection component 22 (for installation on the upper side wall of the electric kettle body). The upper connector U1 also includes a fourth output terminal a7 (i.e., the seventh conductive ring, not shown in the figure) and a high water level output signal line D5. The high water level detection component 22 is electrically connected to the fourth output terminal a7 through the high water level output signal line D5. The lower connector U2 also includes a fourth input terminal b7 (i.e., adding an additional conductive spring 19, not shown in the figure) electrically connected to the fourth output terminal a7. The fourth input terminal b7 is connected to the MCU circuit.

[0088] In Embodiment 5, by adding a high water level detection component 22, the electric kettle can achieve high water level detection, and can automatically stop adding water after the maximum water level is reached when adding water.

[0089] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. An electrical connector, comprising an upper connector having a plurality of terminals for realizing an electrical connection function, the plurality of terminals including a ground terminal, a live terminal, a neutral terminal, a first terminal, and a second terminal, characterized in that: The upper connector is connected to two sets of water level detection electrodes that are spaced apart from each other. The two sets of water level detection electrodes are electrically connected to the first output electrode and the second output electrode respectively through water level input signal line and water level output signal line. The two sets of water level detection electrodes are connected by water body to form a water level detection loop to realize the water level detection function.

2. An electrical connector according to claim 1, characterized in that: The upper connector includes an upper connector seat, on which a central mounting channel is provided. An insulating valve core is modularly assembled and connected within the central mounting channel. An axial water inlet channel is provided within the insulating valve core. The two sets of water level detection electrodes are fixed on the insulating valve core.

3. An electrical connector according to claim 2, characterized in that: An insulating barrier extends from the top surface of the insulating valve core, and the insulating barrier is spaced between two sets of water level detection electrodes.

4. An electrical connector according to claim 2, characterized in that: The top of the insulating valve core is connected to an elastic umbrella cover, which elastically covers the upper side of the water inlet channel.

5. An electrical connector according to claim 2, characterized in that: The top surface of the insulating valve core has two insulating bosses that are arranged on opposite sides of the water inlet channel. At least part of the water level detection electrode is integrally injection molded into the insulating boss, and the other part extends out of the upper side of the insulating boss and is exposed to form a detection end.

6. An electrical connector according to claim 2, characterized in that: The upper connector is also provided with a third output terminal, and the upper connector or insulating valve core is provided with a thermistor. The input terminal of the thermistor is electrically connected to the third output terminal through a temperature sensing input signal line, and the output terminal of the thermistor is electrically connected to the first output terminal through a temperature sensing output signal line.

7. An electrical connector according to claim 6, characterized in that: The insulating valve core is provided with a first conductive terminal piece, a second conductive terminal piece and a third conductive terminal piece, wherein one water level detection electrode is electrically connected to the second output electrode through the first conductive terminal piece, and the other water level detection electrode is electrically connected to the first output electrode through the second conductive terminal piece; The insulating valve core has an isolation chamber separated from the water inlet channel. The thermistor is installed in the isolation chamber. The temperature sensing input signal line of the thermistor is connected to the third conductive terminal piece. The third conductive terminal piece is electrically connected to the third output electrode. The temperature sensing output signal line of the thermistor is connected to the second conductive terminal piece.

8. An electrical connector according to claim 7, characterized in that: The water level detection electrode is integrally made of conductive material. At least part of the front half of the conductive material is integrally injection molded into the insulating valve core and the insulating boss, and forms the water level input signal line and the water level output signal line respectively. The rear half of the conductive material extends out of the insulating valve core and forms the first conductive terminal piece and the second conductive terminal piece respectively.

9. An electrical connector according to claim 6, characterized in that: The upper connector also includes a metal connecting plate, which is installed on the upper side of the upper connector seat. A live wire anti-dry burning switch and a neutral wire anti-dry burning switch are also provided between the upper connector seat and the metal connecting plate. The bottom of the upper connector seat is provided with a coupling cavity, and the coupling cavity is provided with concentric but different diameter wires. The first conductive ring forms the ground wire outlet, and the metal connecting plate is electrically connected to the first conductive ring. The second conductive ring and the third conductive ring respectively constitute the live wire outlet and the neutral wire outlet. The live wire anti-dry burning switch and the neutral wire anti-dry burning switch are electrically connected to the second conductive ring and the third conductive ring respectively. The fourth conductive ring forms the first output electrode. The output terminal of the thermistor is electrically connected to the fourth conductive ring through a temperature sensing output signal line. One of the water level detection electrodes is linearly electrically connected to the fourth conductive ring through a water level output signal. The fifth conductive ring forms the second output electrode, and another water level detection electrode is electrically connected to the fifth conductive ring through the water level input signal line; The sixth conductive ring forms the third output terminal, and the input terminal of the thermistor is electrically connected to the sixth conductive ring through the temperature sensing input signal line.

10. An electrical connector according to claim 9, characterized in that: It also includes a lower connector, which has a ground wire connection, a live wire connection, a neutral wire connection, a first connection, a second connection, and a third connection that are electrically connected to the terminals of the upper connector. The first connection has a low water level output terminal and a temperature output terminal. The second connection, the third connection, the low water level output terminal, and the temperature output terminal are each connected to the MCU circuit outside the lower connector.

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