Electric connector

Abstract

The invention relates to an electric connector, which comprises an upper connector, the upper connector is provided with a plurality of lead-out electrodes for realizing an electric connection function, 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, and the upper connector is connected with two groups of water level detection electrodes which are arranged at intervals. Wherein one water level detection electrode is electrically connected to the first lead-out electrode through a water level input signal line, the other water level detection electrode is electrically connected to the second lead-out electrode through a water level output signal line, and 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] The present invention relates to the field of electrical connectors, and specifically to an electrical connector. Background Art

[0002] Currently, existing modular water inlet structures, such as the "modular water inlet structure with integrated probe" in the Chinese patent literature with the application number CN202220241523.5, mainly include a water inlet pipe structure for installation on a coupler. A thermistor and a water level detector are provided on the water inlet pipe structure, and the thermistor and the water level detector are electrically connected to a terminal piece through their lead wires respectively. During actual use, when performing water level detection, the water level detector can only serve as one pole in the water level detection circuit, and the other pole in the water level detection circuit is generally realized by a heating plate. Therefore, the modular water inlet structure must be installed on the heating plate for use, and the water body is used as a conductive medium to connect the heating plate and the water level detector, thereby forming a water level detection circuit.

[0003] However, in this design, the heating plate is connected to a conductive ring on the coupler and used as a ground wire. Therefore, limited by the number of conductive rings on the coupler, one pole in the water level detection circuit can only borrow the ground wire for lead-out, but this method will affect the electrical safety of the electric heating equipment and does not meet the current safety regulations. In addition, the modular water inlet structure and the heating plate mainly use silicone as an insulating part to block the connection between the steel cover of the modular water inlet structure and the heating plate to generate an insulating effect. However, after scaling occurs after boiling water in hot water for a long time, it is easy to 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 8 mm, but this method makes the appearance of the electrical appliance uglier and is not conducive to sales. Therefore, the electrical connector needs to be further improved. Summary of the Invention

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

[0005] An electrical connector includes an upper connector, and the upper connector is provided with a plurality of outgoing poles for realizing electrical connection functions. The plurality of outgoing poles include a ground wire outgoing pole, a live wire outgoing pole, a neutral wire outgoing pole, a first outgoing pole, and a second outgoing pole. Two sets of water level detection poles are connected to the upper connector and are spaced apart from each other. The two sets of water level detection poles are electrically connected to the first outgoing pole and the second outgoing pole through a water level input signal wire and a water level output signal wire respectively, and the two sets of water level detection poles are connected through the water body to form a water level detection circuit for realizing the water level detection function.

[0006] The purpose of the present invention can also be solved by the following technical measures: As a more specific solution, the upper connector includes an upper connection base, a central installation channel is provided on the upper connection base, an insulating valve core is modularly assembled and connected in the central installation channel, a water inlet channel is axially opened in the insulating valve core, and the two groups of water level detection electrodes are fixed on the insulating valve core.

[0007] As a further solution, an insulating retaining wall extends from the top surface of the insulating valve core, and the insulating retaining wall is disposed at intervals between the two groups of water level detection electrodes.

[0008] As a further solution, an elastic umbrella cover is connected to the top of the insulating valve core, and the elastic umbrella cover elastically covers the upper side of the water inlet channel As a further solution, two insulating bosses are integrally extended from the top surface of the insulating valve core and are disposed on opposite sides of the water inlet channel. At least a part of the water level detection electrode is integrally injection-molded in 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.

[0009] As a further solution, a third lead-out electrode is further provided on the upper connector, a thermistor is provided on the upper connection base or the insulating valve core, the input end of the thermistor is electrically connected to the third lead-out electrode through a temperature-sensing input signal wire, and the output end of the thermistor is commonly electrically connected to the first lead-out electrode through a temperature-sensing output signal wire.

[0010] As a further solution, a first conductive terminal piece, a second conductive terminal piece and a third conductive terminal piece are provided on the insulating valve core. One water level detection electrode is electrically connected to the second lead-out electrode through the first conductive terminal piece, and the other water level detection electrode is electrically connected to the first lead-out electrode through the second conductive terminal piece; As a further solution, an isolation cavity separated from the water inlet channel is provided in the insulating valve core, the thermistor is installed in the isolation cavity, the temperature-sensing input signal wire in the thermistor is connected to the third conductive terminal piece, the third conductive terminal piece is electrically connected to the third lead-out electrode, and the temperature-sensing output signal wire of the thermistor is connected to the second conductive terminal piece.

[0011] As a further solution, the water level detection electrode is integrally made of a conductive material. At least a part of the front half of the conductive material is integrally injection-molded in the insulating valve core and the insulating boss and respectively forms a water level input signal wire and a water level output signal wire. The rear half of the conductive material extends out of the insulating valve core and respectively forms a first conductive terminal piece and a second conductive terminal piece.

[0012] As a further solution, the upper connector further includes a metal connecting plate, the metal connecting plate is installed on the upper side of the upper connection base, and a live wire anti-dry burning switch and a neutral wire anti-dry burning switch are further provided between the upper connection base and the metal connecting plate. A coupling cavity is provided at the bottom of the upper connection base, and concentric but different-diameter ones are provided in the coupling cavity; The first conductive ring forms a ground wire connection terminal, and the metal connecting plate is electrically connected to the first conductive ring; The second conductive ring and the third conductive ring respectively form a live wire connection terminal and a neutral wire connection terminal. The live wire anti-dry burning switch and the neutral wire anti-dry burning switch are respectively electrically connected to the second conductive ring and the third conductive ring; The fourth conductive ring forms a first connection terminal. The output end of the thermistor is electrically connected to the fourth conductive ring through a temperature sensing output signal line, and one of the water level detection electrodes is electrically connected to the fourth conductive ring through a water level output signal line; The fifth conductive ring forms a second connection terminal, and the other water level detection electrode is electrically connected to the fifth conductive ring through a water level input signal line; The sixth conductive ring forms a third connection terminal. The input end of the thermistor is electrically connected to the sixth conductive ring through a temperature sensing input signal line.

[0013] As a further solution, it further includes a lower connector. The lower connector is provided with a ground wire access terminal, a live wire access terminal, a neutral wire access terminal, a first access terminal, a second access terminal, and a third access terminal that are electrically connected to the respective connection terminals of the upper connector. The first access terminal branches out a low water level output terminal and a temperature output terminal, and the second access terminal, the third access terminal, the low water level output terminal, and the temperature output terminal are respectively connected to the MCU circuit outside the lower connector.

[0014] As a further solution, the lower connector includes a lower connection base. The lower connection base is provided with several concentric coupling grooves with different diameters. The coupling grooves are coupled and inserted with the respective conductive rings on the upper connector, and each coupling groove is provided with a conductive elastic sheet that touches the respective conductive rings. Among them, a tapping terminal is externally connected to the wiring terminal of the conductive elastic sheet corresponding to the fourth conductive ring, and a low water level output terminal and a temperature output terminal are formed on the tapping terminal.

[0015] The beneficial effects of the present invention are as follows: An electrical connector of the present invention forms a positive electrode and a negative electrode through two groups of water level detection electrodes, so that a closed-loop water level detection circuit can be formed on the electrical connector; And the negative electrode of the water level detection borrows the thermistor to be connected to the same level for extraction, so that one pole in the water level detection circuit does not need to borrow the ground wire to lead out externally, ensuring that the water level detection circuit is completely separated from the ground wire, improving the safety of the electric heating device, and meeting the safety regulations requirements; Moreover, the design of the positive electrode and the negative electrode of the water level detection of this structure can ensure that the creepage path between the two is more than 8 mm. Even if it is boiled in hot water for a long time and scale is generated, the water level control will not fail. Description of the Drawings

[0016] Figure 1 This is a schematic diagram of the exploded structure of the upper connector and the lower connector in the present invention.

[0017] Figure 2 This is a schematic diagram of the exploded structure of the upper connector in the present invention.

[0018] Figure 3 This is a schematic diagram of the structure of the insulating valve core in the present invention.

[0019] Figure 4 This is a schematic diagram of the sectional structure of the insulating valve core in the present invention Figure 1 .

[0020] Figure 5 This is a schematic diagram of the structure of the insulating valve core from a top view angle in the present invention.

[0021] Figure 6 This is a schematic diagram of the structure of the insulating valve core from a bottom view angle in the present invention.

[0022] Figure 7 This is a schematic diagram of the distribution structure of each conductive ring in the present invention.

[0023] Figure 8 This is a schematic diagram of the exploded structure of the lower connector in the present invention.

[0024] Figure 9 This is a schematic diagram of the cooperation between the water inlet cover and the insulating valve core in the present invention.

[0025] Figure 10 This is a schematic diagram of the structure of the water inlet cover in the present invention.

[0026] Figure 11 This is a schematic diagram of the sectional structure of the insulating valve core in the present invention Figure 2 .

[0027] Figure 12 This is a schematic diagram of the electrical connection circuit of the second embodiment in the present invention.

[0028] Figure 13 This is a schematic diagram of the connection structure between each signal line and each conductive terminal piece in the present invention.

[0029] Figure 14 This is a schematic diagram of the exploded terminal structure in the present invention.

[0030] Figure 15 This is a schematic diagram of the structure of the insulating valve core of the third embodiment in the present invention.

[0031] Figure 16 This is a schematic diagram of the sectional structure of the insulating valve core of the third embodiment in the present invention.

[0032] Figure 17Schematic cross-sectional structure diagram of the insulating valve core and elastic umbrella cover in the fourth embodiment of the present invention.

[0033] Figure 18 Schematic diagram of the electrical connection circuit in the fifth embodiment of the present invention. Detailed implementation manners

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. Embodiment 1

[0035] Refer to Figures 1 to 12 As shown, an electrical connector includes an upper connector U1. The upper connector U1 is provided with a plurality of outgoing poles for realizing electrical connection functions. The plurality of outgoing poles include a ground wire outgoing pole a1, a live wire outgoing pole a2, a neutral wire outgoing pole a3, a first outgoing pole a4, and a second outgoing pole a5. Two groups of water level detection poles 1 are connected to the upper connector U1 at intervals. The two groups of water level detection poles 1 are electrically connected to the first outgoing pole a4 and the second outgoing pole a5 through a water level input signal line D1 and a water level output signal line D3 respectively. And a water level detection loop is formed by connecting the two groups of water level detection poles 1 through water bodies to realize the water level detection function. Through the above water path detection loop, the reliability detection of the water level of the electric heating appliance is realized, and there are requirements for detection accuracy.

[0036] The electrical connector forms a positive pole and a negative pole through two groups of water level detection poles 1, so that a closed-loop water level detection loop can be formed on the electrical connector, and one pole in the water level detection circuit does not need to be led out through the ground wire, ensuring that the water level detection loop is completely separated from the ground wire, improving the safety of the electric heating device, and meeting the safety regulations requirements.

[0037] In this embodiment, the water level input signal line D1 and the water level output signal line D3 are low water level input signals and low water level output signals, and the low water level detection function is realized through the low water level input signal and the low water level output signal.

[0038] During use, the water in the electric kettle simultaneously soaks the detection ends 2 of the two groups of water level detection poles. A loop is formed between the two groups of water level detection poles through the water body as a medium. The MCU circuit judges that the water level is in a non-low water level state and does not add water to the electric kettle. When the water level is lower than the water level detection pole and the two groups of water level detection poles cannot form a loop through the water body, the MCU circuit judges that the water level is in a low water level state, and thus automatically adds water to the electric kettle or stops heating.

[0039] The upper connector U1 includes an upper connector seat 4. A central installation channel is provided on the upper connector seat 4. An insulating valve core 5 is modularly assembled and connected in the central installation channel 401. An upper water channel 502 is axially formed in the insulating valve core 5. The two groups of water level detection electrodes 1 are fixed on the insulating valve core 5. This structure enables the insulating valve core 5 to have the function of supplying water at the bottom.

[0040] The structure of the insulating valve core 5 is easy to install and disassemble. The insulating valve core 5 can be independently produced and assembled separately from the upper connector U1 of the thermostat. The insulating valve core 5 is formed by plastic molding. The two groups of water level detection electrodes are fixed by the plastic insulating valve core 5, making the creepage path between them longer than that of the prior art. Plastic is not easy to scale and is convenient for installation; the creepage path is more than 8 mm. Even if water is boiled in hot water for a long time and scale is generated, it will not cause the water level control to fail.

[0041] An insulating retaining wall 54 extends from the top surface of the insulating valve core. The insulating retaining wall 54 is arranged at intervals between the two groups of water level detection electrodes 1; in this embodiment, the insulating retaining wall 54 is higher than the insulating boss 55. The creepage distance between the water level detection electrodes can be increased through the insulating retaining wall 54, making the water level detection more accurate and ensuring that it will not fail.

[0042] Two insulating bosses 55 are integrally extended from the top surface of the insulating valve core 5 and are arranged on the opposite sides of the upper water channel 502. At least part of the water level detection electrode 1 is integrally injection-molded in the insulating boss 55, and the other part extends out of the upper side of the insulating boss 55 and is exposed to form a detection end 2; the insulating boss 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 during future use, the two groups of water level detection electrodes 1 will not be continuously connected due to scale for a long time, resulting in the failure of water level detection.

[0043] 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 outgoing electrode a5 through the first conductive terminal piece 51, and the other water level detection electrode 1 is electrically connected to the first outgoing electrode a4 through the second conductive terminal piece 52; The water level detection electrode 1 is integrally made of a conductive material. At least part of the front half of the conductive material is integrally injection-molded in the insulating valve core 5 and the insulating boss 55 and respectively forms a water level input signal line D1 and a 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; By using a bent conductive material to simultaneously form the detection end 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, the cost is low, and with injection molding integrated connection, it can improve production efficiency while making the connection of the two groups of water level detection poles more firm and the integrity better, and situations such as the lead wire becoming loose will not occur.

[0044] In addition, the detection ends 2 of the two groups of water level detection poles 1 are arranged parallel to each other with respect to a pair of symmetry lines, and the two detection ends 2 are arranged in a front-back dislocation along the extending direction of the symmetry line (refer to Figure 5 as shown); this structure enables the water level detection pole 1 to maintain the maximum safety interval distance.

[0045] The insulating valve core 5 includes a water inlet seat 56. A water inlet pipe 57 forming an upper water channel 502 extends downward from the central position of the water inlet seat 56. A check valve assembly 6 for opening and closing the upper water channel 502 is installed in the water inlet pipe 57; In this practical solution, the check valve assembly 6 includes a connecting frame 61, a spring 62, a steel ball pressing cover 63, a leak-proof steel ball 64, and a leak-proof sleeve 65. A positioning cavity 621 for accommodating one end of the spring 62 is provided at the upper end of the steel ball pressing cover 63, and a steel ball groove 622 adapted to the leak-proof steel ball 64 is provided at its lower end. The two ends of the spring 62 are abutted between the connecting frame 61 and the steel ball pressing cover 63. The leak-proof sleeve 65 is hermetically placed at the bottom port of the water inlet pipe 57 and is provided with a water inlet channel 651. An inclined end face 652 inclined towards the water inlet channel 651 is provided at the upper part of the leak-proof sleeve 65. 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 spring 62 on the steel ball pressing cover 63. When water is supplied, the water pressure lifts the leak-proof steel ball 64 and compresses the spring 62. When the water supply stops, it abuts against the inclined end face 652 under the action of the spring 62 force and the self-gravity of the leak-proof steel ball 64 to seal the water inlet channel 651.

[0046] A plurality of radially extending partition grooves 561 are circumferentially formed on the top surface of the water inlet seat 56. A partition 562 is formed between adjacent two partition grooves 561. The two groups of water level detection poles are arranged on different partitions 562. The partition grooves 561 play the role of a water curtain, which helps to drain the accumulated water on the top surface of the insulating valve core 5, or can isolate the accumulated water to prevent the accumulated water from connecting the steel cover 21 made of metal material described below.

[0047] A terminal piece positioning groove 563 is provided on the bottom surface of the water inlet seat 56. 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 cooperation of the positioning through hole 531 and the riveting protrusion 564; The terminal piece positioning groove 563 can not only assist workers in assembling the conductive terminal pieces, but also separate the conductive terminal pieces from each other, reducing the occurrence of creepage problems between the conductive terminal pieces and reducing interference.

[0048] The upper connector U1 further includes a metal connecting plate 7, the metal connecting plate 7 is installed on the upper side of the upper connecting seat 4, and a live wire anti-dry burning switch 8 and a neutral wire anti-dry burning switch 9 are further provided between the upper connecting seat 4 and the metal connecting plate 7. An engaging cavity 402 is provided at the bottom of the upper connecting seat 4, and concentric but different-diameter ones are provided in the engaging cavity 402; A first conductive ring 10, the first conductive ring 10 constitutes a ground wire output pole a1, and the metal connecting plate 7 is electrically connected to the first conductive ring 10; A second conductive ring 11 and a third conductive ring 12, the second conductive ring 11 and the third conductive ring 12 respectively constitute a live wire output pole a2 and a neutral wire output pole, and the live wire anti-dry burning switch 8 and the neutral wire anti-dry burning switch 9 are respectively electrically connected to the second conductive ring 11 and the third conductive ring 12; A fourth conductive ring 13, the fourth conductive ring 13 constitutes a first output pole a4, and one of the water level detection poles 1 is electrically connected to the fourth conductive ring 13 through a water level output signal line D3; A fifth conductive ring 14, the fifth conductive ring 14 constitutes a second output pole a5, and the other water level detection pole 1 is electrically connected to the fifth conductive ring 14 through a water level input signal line D1.

[0049] The above-mentioned live wire anti-dry burning switch 8 and neutral wire anti-dry burning switch 9 are respectively connected in series on 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 a moving contact piece and a static contact piece that elastically touch each other. In addition, a bimetallic strip 16 (as an anti-dry burning element) is provided on the metal connecting plate 7 corresponding to 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.

[0050] It further includes a lower connector U2. The lower connector U2 is provided with 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 output poles of the upper connector U1. The first access pole b4 and the second access pole b5 are respectively connected to the MCU circuit outside the lower connector U2.

[0051] The lower connector U2 includes a lower connecting seat 18. A plurality of concentric but different-diameter engaging grooves 181 are provided on the lower connecting seat 18. The engaging grooves 181 are coupled and inserted in cooperation with the conductive rings on the upper connector U1, and a conductive elastic piece 19 that touches the conductive rings is provided in each engaging groove 181.

[0052] The insulating valve core 5 further includes a steel cover 21. The steel cover 21 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 groups of water level detection electrodes 1 are placed in the water outlet cavity 503. A plurality of drain ports 211 are circumferentially formed on the side wall of the steel cover 21. The bottom edge height of the drain ports 211 is close to the partition groove 561. The steel cover 21 can block the water flow ejected upward from the water inlet channel 502, so that the water can slowly flow into the kettle body through the drain ports 211.

[0053] At least one open bubble discharge port 212 is formed on the top wall of the steel cover 21 and is located above the water outlet cavity 503. By arranging the bubble discharge port 212 on the top wall of the steel cover 21, it can conform to the rising direction of the small bubbles, so that the small bubbles cannot adhere to the bottom surface of the top wall, and the discharge speed of the small bubbles is increased. A water blocking cover 213 is arranged above the bubble discharge port 212. A plurality of support plates 214 connected to the top wall of the steel cover 21 are circumferentially and uniformly arranged on the water blocking cover 213, and a lateral bubble discharge slit 215 communicating with the bubble discharge port 212 is formed between the water blocking cover 213 and the top wall of the steel cover 21. The bubble discharge port 212 and the bubble discharge slit 215 simultaneously serve the functions of discharging water, admitting water and discharging bubbles. Embodiment 2

[0054] Reference Figures 11 to 14 As shown, a third outgoing electrode a6 is further provided on the upper connector U1. A thermistor 3 is arranged on the upper connection seat 4 or the insulating valve core 5. The input end of the thermistor 3 is electrically connected to the third outgoing electrode a6 through a temperature sensing input signal wire D2, and the output end of the thermistor 3 is commonly electrically connected to the first outgoing electrode a4 through a temperature sensing output signal wire D3. In Embodiment 2, the temperature sensing input signal wire D2 and the temperature sensing output signal wire D4 realize the water temperature detection function, which can combine the thermistor 3, the two groups of water level detection electrodes and the insulating valve core 5 into an installation module, making the surface of the heating plate of the electric kettle cleaner and simpler and keeping it as flat as possible. The water level detection circuit and the temperature detection circuit adopt weak current output, and the two can be free from interference during use.

[0055] Correspondingly, a third conductive terminal piece 53 is further provided on the insulating valve core 5. An isolation cavity 501 separated from the water inlet channel 502 is arranged in the insulating valve core 5. The thermistor 3 is installed in the isolation cavity 501. The temperature sensing input signal wire D2 in the thermistor 3 is connected to the third conductive terminal piece 53, the third conductive terminal piece 53 is electrically connected to the third outgoing electrode a6, and the temperature sensing output signal wire D3 of the thermistor 3 is connected to the second conductive terminal piece 52.

[0056] In addition, as Figure 7As shown, a sixth conductive ring 15 is further provided in the coupling cavity 402. The sixth conductive ring 15 forms a third output electrode a6. The input end of the thermistor 3 is electrically connected to the sixth conductive ring 15 through a temperature sensing input signal line D2, and the output end of the thermistor 3 is electrically connected to the fourth conductive ring 13 through a temperature sensing output signal line D3. Meanwhile, in the second embodiment, the lower connector U2 is further provided with a third input electrode b6 electrically connected to the third output electrode a6. The first input electrode b4 branches out a low water level output end b41 and a temperature output end b42. The low water level output end b41 and the temperature output end b42 are respectively connected to the MCU circuit outside the lower connector U2.

[0057] This structure enables the upper connector U1 and the lower connector U2 to be separated, which is mainly applied to the coupler. In addition, the low water level signal and the temperature signal are output on the same line through the first output electrode a4 and the first input electrode b4, but are respectively connected to the MCU circuit through the low water level output end b41 and the temperature output end b42, so that an independent low water level detection circuit and temperature detection circuit can be formed, and different signal sources can still be identified.

[0058] Wherein, a tapping terminal 20 is externally connected to the wiring terminal of the conductive elastic sheet 19 corresponding to the fourth conductive ring 13. The low water level output end b41 and the temperature output end b42 are formed on the tapping terminal 20.

[0059] The tapping terminal 20 includes a first terminal piece 201 and a second terminal piece 202. The first terminal piece 201 includes a first base portion 2011. A first electrode connection portion 2012 for connecting to the conductive elastic sheet 19 of the fourth conductive ring 13 is provided on the first base portion 2011. A first cable crimping portion 2013 is provided at one end of the first base portion 2011. The first cable crimping portion 2013 forms the water level output end b41. The first cable crimping portion 2013 crimps the lead wire connected to the circuit control board (MCU circuit). An electrode connection piece 2014 is also bent at one end of the first base portion 2011. The second terminal piece 202 includes a second base portion 2021. A second electrode connection portion 2022 for connecting to the electrode connection piece 2014 is provided on the second base portion 2021. A second cable crimping portion 2023 is provided at one end of the second base portion 2021. The second cable crimping portion 2023 forms the temperature output end b42. The second cable crimping portion 2023 crimps the lead wire connected to the circuit control board (MCU circuit).

[0060] In addition, at least a part of the second conductive terminal piece 52 is externally exposed (not injection-molded in the insulating valve core 5). A wire pressing ear 521 is provided at the exposed position. The other lead wire of the thermistor 3 is crimped on the wire pressing ear 521 to realize co-connection on the second conductive terminal piece 52. This structure enables the assembly of the thermistor 3 to be fully automated. Example 3

[0061] 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. Refer to 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. An installation hole 504 is provided on the insulating valve core 5. The lower part of the metal probe 23 is connected in the installation hole 504 and is sleeved with a silica gel sleeve 24 at the lower part, so that the lower half of the silica gel sleeve 24 is separated from the insulating valve core 5. The upper half of the silica gel sleeve 24 constitutes an insulating boss 55, and the silica gel sleeve 24 is provided with a limiting flange 241 that cooperates with the upper and lower ends of the installation hole 504. The bottom end of the metal probe 23 is connected with a second conductive terminal piece 52, and the fixing method of the second conductive terminal piece 52 can be referred to as shown in the third conductive terminal piece 53.

[0062] In addition, in Example 3, a retaining ring 58 that surrounds the edge is further extended on the top surface of the insulating valve core 5 (preferably, the height of the retaining ring 58 is lower than that of the silica gel sleeve 24, the insulating boss 55, and the drain port 211). A gap or interference fit is formed between the retaining ring 58 and the steel cover 21, which can increase the fixing area of the steel cover 21 and make the installation more firm. And a notch 581 is provided at the position of the retaining ring 58 corresponding to the water level detection electrode. When pouring water, the notch 581 helps to pour out the accumulated water on the top surface of the insulating valve core 5. The retaining ring 58 with this structure can also be applied to Example 1 at the same time. Example 4

[0063] Example 4 can be improved based on any one of Examples 1 to 3. Specifically: Refer to Figure 17 As shown, an elastic umbrella cover 25 is connected to the top of the insulating valve core 5. 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. At the same time, in this example, the insulating retaining wall 54 structure is cancelled; this structure uses the elastic umbrella cover 25 to enable the insulating valve core 5 to play a function of preventing secondary reverse backflow. Example 5

[0064] The difference between Example 5 and Example 1 is that: Refer to Figure 18 As shown, it further includes a high water level detection component 22 (for installation on the upper part of the side wall of the kettle body of the electric kettle). The upper connector U1 further includes a fourth outgoing electrode a7 (i.e., the seventh conductive ring, not marked in the drawing) and a high water level output signal line D5. The high water level detection component 22 is electrically connected to the fourth outgoing electrode a7 through the high water level output signal line D5. The lower connector U2 further includes a fourth incoming electrode b7 (i.e., adding one more conductive elastic piece 19, not marked in the drawing) that is electrically connected to the fourth outgoing electrode a7, and the fourth incoming electrode b7 is connected to the MCU circuit.

[0065] In the fifth embodiment, by adding the high water level detector 22, the electric kettle can achieve high water level detection, and after reaching the maximum water level during water filling, the function of automatically stopping water filling can be realized.

[0066] The above is the preferred solution of the present invention, which shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

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

2. An electrical connector according to claim 1, characterized in that: The upper connector includes an upper connecting seat, which is provided with a central installation channel, in which an insulating valve core is modularly assembled and connected, an upper water channel is axially opened in the insulating valve core, and 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 retaining wall extends from the top surface of the insulating valve core, and the insulating retaining wall is arranged between two groups 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 with an elastic umbrella cover, and the elastic umbrella cover elastically covers the upper side of the water supply channel.

5. An electrical connector according to claim 2, characterized in that: The top surface of the insulating valve core is integrally extended with two insulating bosses arranged on opposite sides of the water supply channel, and at least a part of the water level detection electrode is integrally injection-molded in the insulating boss, and the other part extends out from the upper side of the insulating boss and is exposed to form a detection terminal.

6. An electrical connector according to claim 2, characterized in that: The upper connector is also provided with a third output pole, and the upper connecting seat or the insulating valve core is provided with a thermistor. The input end of the thermistor is electrically connected to the third output pole through a temperature-sensing input signal line, and the output end of the thermistor is electrically connected to the first output pole 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 a water level detection electrode is electrically connected to the second output electrode through the first conductive terminal piece, and another water level detection electrode is electrically connected to the first output electrode through the second conductive terminal piece; An isolation chamber separated from the water supply channel is provided in the insulating valve core, and the thermistor is installed in the isolation chamber. The temperature sensing input signal line in the thermistor is connected to the third conductive terminal piece, the third conductive terminal piece is electrically connected to the third output pole, and 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 made of an integral conductive material. At least a portion of the front half of the conductive material is integrally injection molded into the insulating valve core and the insulating boss, and respectively constitutes a water level input signal line and a water level output signal line. The rear half of the conductive material extends out of the insulating valve core and respectively forms a first conductive terminal piece and a second conductive terminal piece.

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 connecting seat, and a live wire anti-dry-burning switch and a neutral wire anti-dry-burning switch are also provided between the upper connecting seat and the metal connecting plate, and a coupling cavity is provided at the bottom of the upper connecting seat, and concentric but different diameters are provided in the coupling cavity; A first conductive ring, the first conductive ring forms a ground connection electrode, and the metal connecting plate is electrically connected to the first conductive ring; A second conductive ring and a third conductive ring, the second conductive ring and the third conductive ring respectively constitute a live wire connection pole and a neutral wire connection pole, and the live wire anti-dry-burning switch and the neutral wire anti-dry-burning switch are respectively electrically connected to the second conductive ring and the third conductive ring; A fourth conductive ring, the fourth conductive ring constitutes a first output electrode, the output end of the thermistor is electrically connected to the fourth conductive ring through a temperature sensing output signal line, wherein a water level detection electrode is electrically connected to the fourth conductive ring through a water level output signal line; A fifth conductive ring, the fifth conductive ring constitutes a second output electrode, and another water level detection electrode is electrically connected to the fifth conductive ring through a water level input signal line; The sixth conductive ring forms a third output terminal, and the input end of the thermistor is electrically connected to the sixth conductive ring through a temperature sensing input signal line.

10. An electrical connector according to claim 9, characterized in that: It also includes a lower connector, which is provided with a ground access pole, a live access pole, a neutral access pole, a first access pole, a second access pole and a third access pole electrically connected to each output pole of the upper connector, wherein the first access pole branches out a low water level output terminal and a temperature output terminal, and the second access pole, the third access pole, the low water level output terminal and the temperature output terminal are respectively connected to the MCU circuit outside the lower connector.

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