Water level detection module capable of forming loop

Abstract

The utility model relates to a water level detection module capable of forming a loop, which comprises an insulating valve core modularly arranged on an upper connector, a water feeding channel is axially arranged in the insulating valve core, and the insulating valve core is connected with a first conductive terminal sheet and a second conductive terminal sheet. A water level detection positive electrode and a water level detection negative electrode which extend out of the outer side face of the insulating valve element are arranged on the insulating valve element at intervals, and the water level detection positive electrode and the water level detection negative electrode are electrically connected with the first conductive terminal piece and the second conductive terminal piece through outgoing lines of the water level detection positive electrode and the water level detection negative electrode respectively to form a water level detection loop used for achieving the water level detection function. According to the structure, the positive electrode and the negative electrode are formed on the modularized insulating valve element through the water level detection positive electrode and the water level detection negative electrode, so that the insulating valve element can form a closed-loop water level detection circuit, one electrode in the water level detection circuit does not need to be led out through a ground wire, the safety of the electric heating equipment is improved, and the safety requirement is met.

Description

Technical Field

[0001] This utility model relates to the field of temperature controllers, specifically a self-contained water level detection module. 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 an insulating valve core for mounting on a coupler. The insulating valve core is equipped with a thermistor and a water level detection element, which are electrically connected to conductive terminal blocks via their leads. In actual use, when detecting water level, the water level detection element can only function as one pole in the water level detection circuit, while the other pole... The modular water supply structure is typically implemented using a heating plate. Therefore, it must be installed on the heating plate. Water is used as a conductive medium to connect the heating plate and the water level detection device, thus forming a water level detection circuit. In this process, the heating plate is connected to a conductor on the coupler as a ground wire. Therefore, due to the limitation on the number of conductors 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 the current safety regulations. Therefore, the modular water supply structure needs further improvement. Utility Model Content

[0003] The purpose of this utility model is to solve the above-mentioned existing problems and provide a simple and reasonable self-circuit water level detection module, whose main function is to improve the safety of the insulating valve core.

[0004] A self-contained water level detection module includes an insulating valve core for modular mounting on an upper connector. The insulating valve core has an axially formed water inlet channel. A first conductive terminal and a second conductive terminal are connected to the insulating valve core. A positive and a negative water level detection electrode are spaced apart on the insulating valve core and extend outwards from it. The positive and negative water level detection electrodes are electrically connected to the first and second conductive terminals respectively through their respective leads to form a water level detection circuit for realizing the water level detection function.

[0005] The objective of this utility model can also be achieved by the following technical measures:

[0006] As a more specific embodiment, the insulating valve core is further connected to a third conductive terminal piece, and an isolation cavity is provided inside the insulating valve core. A thermistor is installed inside the isolation cavity, and one lead of the thermistor is electrically connected to the third conductive terminal piece, while the other lead is connected to the second conductive terminal piece.

[0007] As a further embodiment, the top surface of the insulating valve core extends with an insulating barrier wall, which is spaced between the positive and negative electrodes of the water level detection.

[0008] As a further embodiment, the top surface of the insulating valve core has two insulating bosses that are arranged on opposite sides. At least part of the positive and negative water level detection electrodes are 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.

[0009] As a further embodiment, the positive and negative electrodes for water level detection are made by continuously bending a spring. At least part of the front half of the spring is integrally injection molded into the insulating valve core and the insulating boss to form a lead wire. The rear half of the spring extends out of the insulating valve core and forms a first conductive terminal piece and a second conductive terminal piece, respectively.

[0010] As a further embodiment, the detection terminals of the positive and negative water level detection electrodes are arranged parallel to each other relative to a line of symmetry, and the two detection terminals are staggered one after the other along the extension direction of the line of symmetry.

[0011] As a further embodiment, the insulating valve core includes a water inlet seat, and a water inlet pipe extending downward from the center of the water inlet seat to form a water supply channel. A check valve assembly for opening and closing the water supply channel is installed inside the water inlet pipe. An open-bottom isolation cavity is formed between the water inlet pipe and the water inlet seat. The isolation cavity is separated from the water supply channel. The thermistor is abutting or close to the top surface of the isolation cavity.

[0012] As a further embodiment, the top surface of the insulating valve core is provided with several radially extending partition grooves, and a partition is formed between two adjacent partition grooves. The positive and negative electrodes for water level detection are set on different partitions.

[0013] As a further embodiment, the insulating valve core also includes a water outlet cover, which is nested on the top of the insulating valve core and its inner cavity forms a water outlet cavity. The detection ends of the positive and negative water level detection electrodes are placed in the water outlet cavity. Several drainage ports are circumferentially opened on the side wall of the water outlet cover, and the bottom edge height of the drainage ports is close to that of the partition groove.

[0014] As a further embodiment, the top wall of the water outlet cover is provided with at least one open air bubble outlet located above the water outlet cavity;

[0015] A water baffle is provided above the bubble outlet. The water baffle has several support plates that are evenly distributed around the circumference and connected to the top wall of the water outlet cover. A lateral bubble discharge slit is formed between the water baffle and the top wall of the water outlet cover, which is connected to the bubble outlet.

[0016] The beneficial effects of this utility model are as follows:

[0017] This utility model discloses a self-contained water level detection module. The structure forms positive and negative poles on a modular insulating valve core, thereby creating a closed-loop water level detection circuit on the insulating valve core. This eliminates the need for a ground wire to be used to bring one pole of the water level detection circuit out to the outside, ensuring that the water level detection circuit is completely disconnected from the ground wire, improving the safety of the electric heating equipment, and meeting safety regulations. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of one embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the connection structure between the lead wire and the conductive terminal piece in this utility model.

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the insulating valve core in this utility model. Figure 1 .

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the insulating valve core in this utility model. Figure 2 .

[0022] Figure 5 This is a top-view structural diagram of the insulating valve core in this utility model.

[0023] Figure 6 This is a schematic diagram of the insulating valve core structure viewed from below in this utility model.

[0024] Figure 7 This is a schematic diagram of the cross-sectional structure of the water outlet cover in this utility model.

[0025] Figure 8 This is a schematic diagram of the water outlet cover structure in this utility model. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] refer to Figures 1 to 8 As shown, a self-contained water level detection module includes an insulating valve core 1 for modular installation on an upper connector. The insulating valve core 1 has an axially formed water inlet channel. The insulating valve core 1 is connected to a first conductive terminal piece 2, a second conductive terminal piece 3, and a third conductive terminal piece 7. The insulating valve core 1 is provided with a water level detection positive electrode 5 and a water level detection negative electrode 4 extending outward from its outer side at intervals. The water level detection positive electrode 5 and the water level detection negative electrode 4 are electrically connected to the first conductive terminal piece 2 and the second conductive terminal piece 3 respectively through their respective lead wires 41 and 51 to form a water level detection circuit for realizing the water level detection function.

[0028] This structure forms positive and negative electrodes on the modular insulating valve core 1 through the positive electrode 5 and the negative electrode 4 for water level detection, so that a closed-loop water level detection circuit can be formed on the modular water supply structure. This eliminates the need for one electrode in the water level detection circuit to be led out externally through a ground wire, ensuring that the water level detection circuit is completely disconnected from the ground wire, improving the safety of the electric heating equipment, and meeting safety regulations.

[0029] An isolation chamber 102 is provided inside the insulating valve core 1. A thermistor 6 is installed inside the isolation chamber 102. One lead 61 of the thermistor 6 is electrically connected to the third conductive terminal piece 7, and the other lead 62 is connected to the second conductive terminal piece 3.

[0030] This structure combines the thermistor 6, the positive electrode 5 and the negative electrode 4 for water level detection, and the insulating valve core 1 into an installation module. It also allows one electrode on the positive electrode 5 for water level detection and one electrode on the thermistor 6 to share a common conductive terminal. The water level detection circuit and the temperature detection circuit use weak current output, so the two can operate without interfering with each other.

[0031] An insulating barrier 13 extends from the top surface of the insulating valve core 1. The insulating barrier 13 is spaced between the positive electrode 5 and the negative electrode 4 for water level detection. In this embodiment, the insulating barrier 13 is higher than the insulating boss 8. The insulating barrier 13 can increase the creepage distance between the positive electrode 5 and the negative electrode 4 for water level detection, making the water level detection more accurate.

[0032] The top surface of the insulating valve core 1 has two insulating bosses 8 extending integrally from opposite sides. At least part of the positive electrode 5 and the negative electrode 4 for water level detection are integrally injection molded into the insulating bosses 8, and the other part extends out of the upper side of the insulating bosses 8 and is exposed to form detection ends 42 and 52. The insulating bosses 8 can raise the height of the detection ends 42 and 52 of the positive electrode 5 and the negative electrode 4 for water level detection. Even if scale accumulates on the top surface of the insulating valve core 1 after use, the positive electrode 5 and the negative electrode 4 for water level detection will not be connected for a long time due to scale, thus preventing water level detection failure.

[0033] The positive electrode 5 and negative electrode 4 for water level detection are made by continuous bending of a spring. At least part of the front half of the spring is integrally injection molded into the insulating valve core 1 and the insulating boss 8 and forms a lead wire. The rear half of the spring extends out of the outside of the insulating valve core 1 and forms the first conductive terminal piece 2 and the second conductive terminal piece 3 respectively.

[0034] By using bent springs to simultaneously form detection terminals 42 and 52, lead wires 41 and 51, and the first conductive terminal piece 2 or the second conductive terminal piece 3, 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 positive electrode 5 and the negative electrode 4 of the water level detection more secure.

[0035] The detection terminals 42 and 52 of the positive and negative electrodes for water level detection are arranged parallel to each other relative to a line of symmetry, and the two detection terminals 42 and 52 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 positive electrode 5 and the negative electrode 4 of the water level detection maintain the maximum safe distance.

[0036] The insulating valve core 1 includes a water inlet seat 10. A water inlet pipe 11 extends downward from the center of the water inlet seat 10 to form a water supply channel 101. A check valve assembly 9 for opening and closing the water supply channel 101 is installed inside the water inlet pipe 11. An open-bottom isolation cavity 102 is formed between the water inlet pipe 11 and the water inlet seat 10. The isolation cavity 102 is separated from the water supply channel 101. The thermistor 6 is abutted against or close to the top surface of the isolation cavity 102. This structure enables the insulating valve core 1 to have a bottom water supply function. The thermistor 6 abutted against the top surface of the isolation cavity 102 is used to sense the heat transferred above the insulating valve core 1, thereby determining the drinking water temperature of the electric kettle.

[0037] The top surface of the insulating valve core 1 is provided with several radially extending partition grooves 103. A partition 104 is formed between two adjacent partition grooves 103. The positive electrode 5 and the negative electrode 4 of the water level detection are set on different partitions 104. The partition grooves 103 act as a water curtain. The partition grooves 103 help to drain the water accumulated on the top surface of the insulating valve core 1, or they can isolate the water to prevent the water from connecting to the water outlet cover 12 made of metal material described below.

[0038] The bottom surface of the water inlet seat 10 is provided with a terminal piece positioning groove 105, and a riveting protrusion 106 is provided in the terminal piece positioning groove 105. The third conductive terminal piece 7 is provided with a positioning through hole 107 corresponding to the riveting protrusion 106. The third conductive terminal piece 7 is positioned in the terminal piece positioning groove 105 through the positioning through hole 107 and the riveting protrusion 106.

[0039] The terminal block positioning groove 105 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.

[0040] In addition, at least part of the second conductive terminal piece 3 is exposed (not injection molded into the insulating valve core 1), and a wire clamping lug 31 is provided at the exposed position. The other lead of the thermistor 6 is clamped onto the wire clamping lug 31, so that it is connected to the second conductive terminal piece 3. This structure enables the assembly of the thermistor 6 to be fully automated.

[0041] The insulating valve core 1 also includes a water outlet cover 12, which is nested on the top of the insulating valve core 1 and forms a water outlet cavity 121 in its inner cavity. The detection ends 42 and 52 of the positive water level detection electrode 5 and the negative water level detection electrode 4 are placed in the water outlet cavity 121. Several drain outlets 122 are circumferentially opened on the side wall of the water outlet cover 12. The bottom edge height of the drain outlet 122 is close to that of the partition groove 103. The water outlet cover 12 can block the water flow sprayed upward from the water inlet channel 101, so that the water can slowly flow into the kettle body through the drain outlet 122.

[0042] The top wall of the water outlet cover 12 is provided with at least one open bubble outlet 123 located above the water outlet cavity 121; by opening the bubble outlet 123 on the top wall of the water outlet cover 12, it can follow the direction of the rising of small bubbles, so that the small bubbles cannot adhere to the bottom surface of the top wall, thereby increasing the speed of small bubble discharge.

[0043] A water baffle 124 is provided above the bubble outlet 123. The water baffle 124 has several support plates 125 evenly distributed around it and connected to the top wall of the water outlet cover 12. A lateral bubble discharge slit 126 is formed between the water baffle 124 and the top wall of the water outlet cover 12, which communicates with the bubble outlet 123. The bubble outlet 123 and the bubble discharge slit 126 simultaneously serve the functions of water outlet, water inlet, and bubble discharge.

[0044] In this practical solution, the check valve assembly 9 includes a connecting frame 91, a spring 92, a steel ball cover 93, a leak-proof steel ball 94, and a leak-proof sleeve 95. The upper end of the steel ball cover 93 is provided with a positioning cavity 931 for accommodating one end of the spring 92, and the lower end is provided with a steel ball groove 932 adapted to the leak-proof steel ball 94. The two ends of the spring 92 abut against the connecting frame 91 and the steel ball cover 93. The leak-proof sleeve 95 is sealed at the bottom port of the water inlet pipe 11 and is provided with a water inlet channel 951. The upper part of the leak-proof sleeve 95 is provided with an inclined end face 952 that is inclined towards the water inlet channel 951. The leak-proof steel ball 94 is placed on the inclined end face 952 and seals the water inlet channel 951 under the action of the spring 92 and the steel ball cover 93. When water is added, the water pressure pushes the leak-proof steel ball 94 to compress the spring 92. When water is stopped, the steel ball 94 presses against the inclined end face 952 under the action of the spring 92 and its own weight, thus sealing the water inlet channel 951.

[0045] 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. A self-contained water level detection module, comprising an insulating valve core for modular mounting on an upper connector, wherein an axial water inlet channel is provided within the insulating valve core, and a first conductive terminal piece and a second conductive terminal piece are connected to the insulating valve core, characterized in that: The insulating valve core is provided with a positive and a negative water level detection electrode extending from its outer side at intervals. The positive and negative water level detection electrodes are electrically connected to the first and second conductive terminal pieces respectively through their respective lead wires to form a water level detection circuit for realizing the water level detection function.

2. The self-contained loop water level detection module according to claim 1, characterized in that: The insulating valve core is also connected to a third conductive terminal piece. An isolation cavity is provided inside the insulating valve core, and a thermistor is installed inside the isolation cavity. One lead of the thermistor is electrically connected to the third conductive terminal piece, and the other lead is connected to the second conductive terminal piece.

3. The self-contained loop water level detection module according to claim 1, characterized in that: An insulating barrier extends from the top surface of the insulating valve core, and the insulating barrier is spaced between the positive and negative electrodes of the water level detection.

4. The self-contained loop water level detection module according to claim 1, characterized in that: The top surface of the insulating valve core has two insulating bosses that are arranged on opposite sides. At least part of the positive and negative water level detection electrodes are 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.

5. The self-contained loop water level detection module according to claim 4, characterized in that: The positive and negative electrodes for water level detection are made by continuously bending a spring. At least part of the front half of the spring is integrally injection molded into the insulating valve core and the insulating boss to form a lead wire. The rear half of the spring extends out of the insulating valve core and forms the first conductive terminal piece and the second conductive terminal piece, respectively.

6. The self-contained loop water level detection module according to claim 5, characterized in that: The detection terminals of the positive and negative water level detection electrodes are arranged parallel to each other relative to a line of symmetry, and the two detection terminals are staggered one after the other along the extension direction of the line of symmetry.

7. The self-contained loop water level detection module according to claim 2, characterized in that: The insulating valve core includes a water inlet seat, and a water inlet pipe extending downward from the center of the water inlet seat to form a water supply channel. A check valve assembly for opening and closing the water supply channel is installed inside the water inlet pipe. An open-bottom isolation cavity is formed between the water inlet pipe and the water inlet seat. The isolation cavity is separated from the water supply channel. The thermistor is abutting or close to the top surface of the isolation cavity.

8. The self-contained loop water level detection module according to claim 1, characterized in that: The top surface of the insulating valve core is provided with several radially extending partition grooves, and a partition is formed between two adjacent partition grooves. The positive and negative electrodes for water level detection are set on different partitions.

9. A self-contained loop water level detection module according to claim 7, characterized in that: The insulating valve core also includes a water outlet cover, which is nested on the top of the insulating valve core and its inner cavity forms a water outlet cavity. The detection terminals of the positive and negative water level detection electrodes are placed in the water outlet cavity. Several drainage ports are circumferentially opened on the side wall of the water outlet cover, and the bottom edge height of the drainage ports is close to that of the partition groove.

10. A self-contained loop water level detection module according to claim 9, characterized in that: The top wall of the water outlet cover is provided with at least one open air bubble outlet located above the water outlet cavity; A water baffle is provided above the bubble outlet. The water baffle has several support plates that are evenly distributed around the circumference and connected to the top wall of the water outlet cover. A lateral bubble discharge slit is formed between the water baffle and the top wall of the water outlet cover, which is connected to the bubble outlet.

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