Heating disc with water level detection function and electric kettle

Abstract

The utility model relates to a heating disc with water level detection and an electric kettle, which comprise a heating disc body, the disc surface of the heating disc body is connected with two groups of water level probes which are arranged at intervals, and the two groups of water level probes are respectively connected with a water level input signal line and a water level output signal line. Insulating parts are arranged between the water level probes and the heating disc body, conductive parts of the water level probes are arranged on the upper sides of the insulating parts, the conductive parts and the disc face of the heating disc body are insulated and spaced by a certain height, and the two sets of water level probes are communicated through water higher than the insulating parts to form a water level detection loop. A water level detection function is realized; according to the heating disc with the structure, water level detection does not need to be connected into a loop through a ground wire, the water level detection loop is completely separated from the ground wire, the safety requirement that weak current signals are not connected with the ground wire is effectively met, the heating disc is not electrified, 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 electric kettles, specifically a heating plate with water level detection and an electric kettle. Background Technology

[0002] The current electric kettle structure mainly includes a kettle body and a heating plate assembled at the bottom of the kettle body. A low water level probe is connected to the heating plate. The low water level probe is insulated from the heating plate by a silicone sleeve. During operation, one of the low water level probe and the heating plate serves as the input terminal of the water level detection circuit, and the other of the low water level probe and the heating plate serves as the output terminal of the water level detection circuit. The low water level probe and the heating plate are connected by water. When the water level is lower than the low water level probe, the circuit between the two is broken, triggering the electric kettle's water filling program.

[0003] However, in this design, the heating plate is also used as a ground wire. According to the latest safety regulations, the weak electrical signal of the electric kettle cannot be led out through the ground wire. This method will affect the electrical safety of the electric heating equipment and does not meet the current safety requirements. In addition, after the silicone is boiled in hot water for a long time, it will produce scale, which can easily cause the low water level probe to connect with the heating plate, resulting in the failure of water level control. Therefore, the water level detection structure on the heating plate needs to be further improved. Utility Model Content

[0004] The purpose of this utility model is to solve the above-mentioned existing problems and provide a heating plate and electric kettle with water level detection that has a simple and reasonable structure.

[0005] A heating plate with water level detection includes a heating plate body. Two sets of water level detection needles are connected to the surface of the heating plate body and spaced apart from each other. The two sets of water level detection needles are respectively connected to a water level input signal line and a water level output signal line. An insulating component is provided between the water level detection needles and the heating plate body. The conductive part of the water level detection needle is placed on the upper side of the insulating component and is insulated from the surface of the heating plate body by a certain height. The two sets of water level detection needles are connected by water above the insulating component to form a water level detection circuit for realizing the water level detection function.

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

[0007] As a more specific solution, a temperature sensing probe is also connected to the surface of the heating plate body.

[0008] As a further embodiment, an upper coupler is mounted on the bottom surface of the heating plate body. The upper coupler contains multiple concentric conductive rings of different diameters. The temperature sensing input signal line and temperature sensing output signal line on the temperature sensing probe, as well as the water level input signal line and water level output signal line of the two sets of water level detection needles, are electrically connected to the conductive rings.

[0009] As a further embodiment, the multiple conductive rings include a first conductive ring, a second conductive ring, and a third conductive ring. The temperature sensing input signal line of the temperature sensing probe is electrically connected to the first conductive ring, the water level input signal line of one set of water level detection needles is connected to the second conductive ring, and the temperature sensing output signal line of the temperature sensing probe and the water level output signal line of another set of water level detection needles are both electrically connected to the third conductive ring.

[0010] As a further embodiment, the temperature sensing probe includes a metal housing and a thermistor. The metal housing is fixed to the upper side of the disk by a connecting structure. A temperature sensing cavity is provided inside the metal housing. The thermistor is disposed in the temperature sensing cavity and is abutting or close to the metal housing.

[0011] As a further solution, an insulating component is provided between the metal casing and the heating plate body; the insulating component is a silicone sleeve, which is fitted onto the lower part of the metal casing or the lower part of the water level probe.

[0012] As a further embodiment, the upper coupler includes an upper coupling seat and a metal connecting plate connected to the top surface of the upper coupling seat. The plurality of conductive rings also include a neutral conductive ring, a live conductive ring, and a ground conductive ring. The metal connecting plate is electrically connected to the ground conductive ring, and the two extreme ends of the heating plate body are electrically connected to the neutral conductive ring and the live conductive ring, respectively.

[0013] As a further embodiment, the upper coupler has a central channel, and the heating plate body has a clearance through hole corresponding to the central channel. A water inlet valve core is installed in the central channel, and the water outlet end of the water inlet valve core extends out of the upper side of the clearance through hole.

[0014] As a further embodiment, the heating plate body has one or two mounting ports on its surface, and a module base is detachably connected to each mounting port. The two sets of water level probes and the paired insulating components are each connected to a module base, or the two sets of water level probes and the paired insulating components are connected to a module base together; or the module base is composed of insulating components, and the two sets of water level probes are connected to the insulating components.

[0015] The purpose of this utility model is achieved as follows:

[0016] An electric kettle, wherein the electric kettle is equipped with the aforementioned heating plate with water level detection.

[0017] The beneficial effects of this utility model are as follows:

[0018] This utility model discloses a heating plate and electric kettle with water level detection. The structure of the heating plate eliminates the need for a ground wire to form a circuit for water level detection, ensuring that the water level detection circuit is completely separated from the ground wire. This effectively solves the safety requirement of not grounding weak electrical signals, ensures that the heating plate is not energized, improves the safety of electric heating equipment, and meets safety regulations. Attached Figure Description

[0019] Figure 1 This is a cross-sectional structural diagram of the electric kettle in this utility model.

[0020] Figure 2 This is a schematic diagram of the installation structure of the water level detection needle and temperature sensing probe in this utility model.

[0021] Figure 3 This is a schematic diagram of the surface structure of the heating plate body in this utility model.

[0022] Figure 4 This is a schematic diagram of the upper coupler structure in this utility model.

[0023] Figure 5 This is a schematic diagram of the water level detection needle installation structure in this utility model. Figure 1 .

[0024] Figure 6 This is a schematic diagram of the water level detection needle installation structure in this utility model. Figure 2 .

[0025] Figure 7 This is a schematic diagram of the water level detection needle installation structure in this utility model. Figure 3 . Detailed Implementation

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

[0027] See Figures 1 to 4 As shown, an electric kettle A is equipped with a heating plate with water level detection. The heating plate includes a heating plate body 1. Two sets of water level detection needles 3 and a temperature sensing probe 4 are connected to the surface 2 of the heating plate body 1. The temperature sensing probe 4 is connected to a temperature sensing input signal line 41 and a temperature sensing output signal line 42. The two sets of water level detection needles 3 are respectively connected to the water level input signal line 31 and the water level output signal line 32. An insulating member 5 is provided between the water level detection needles 3 and the heating plate body 1. The conductive part of the water level detection needle 3 is placed on the upper side of the insulating member 5 and is insulated from the surface 2 of the heating plate body 1 by a certain height H. The two sets of water level detection needles 3 are connected by water above the insulating member 5 to form a water level detection circuit to realize the water level detection function.

[0028] This heating element design eliminates the need for a ground wire to form a circuit for water level detection, ensuring complete separation between the water level detection circuit and the ground wire. This effectively addresses the safety requirement of not grounding weak electrical signals, ensuring the heating element is not energized, improving the safety of electric heating equipment, and meeting safety regulations.

[0029] In this embodiment, the water level detection needle 3 is connected to one side of the center of the heating plate body 1, and the temperature sensing probe 4 is connected to the other side of the center of the heating plate body 1, so that the two sets of water level detection needles 3 and temperature sensing probe 4 are isolated at a certain distance to ensure that they do not interfere with each other.

[0030] The bottom surface of the heating plate body 1 is fitted with an upper coupler 6. The upper coupler 6 contains multiple concentric conductive rings of different diameters. The temperature sensing input signal line 41 and temperature sensing output signal line 42 on the temperature sensing probe 4, as well as the water level input signal line 31 and water level output signal line 32 of the two sets of water level detection needles 3, are electrically connected to the conductive rings. The temperature sensing probe 4 receives and outputs signals through the temperature sensing input signal line 41 and temperature sensing output signal line 42. The two sets of water level detection needles 3 form a water level detection circuit through the water level input signal line 31 and water level output signal line 32.

[0031] Multiple conductive rings include a first conductive ring 61, a second conductive ring 62, and a third conductive ring 63. The temperature-sensing input signal line 41 is electrically connected to the first conductive ring 61, the water level input signal line 31 is connected to the second conductive ring 62, and the temperature-sensing output signal line 42 and the water level output signal line 32 are electrically connected to the third conductive ring 63. This allows the water level output signal and the temperature-sensing output signal to share a single conductive ring for output. Since both signals use weak current output, they do not interfere with each other during use. This minimizes the number of conductive rings while maintaining the same functionality, effectively reducing the overall volume of the upper coupler 6.

[0032] In this embodiment, the temperature sensing probe 4 includes a metal housing 43 and a thermistor 44. The two leads of the thermistor 44 respectively form a water level input signal line 31 and a water level output signal line 32. The metal housing 43 is fixed to the upper side of the panel 2 by a connecting structure. A temperature sensing cavity 401 is provided inside the metal housing 43. The thermistor 44 is disposed in the temperature sensing cavity 401 and is abutting or close to the metal housing 43. The temperature sensing probe 4 with this structure can directly contact the water in the electric kettle, improving the accuracy of temperature detection.

[0033] The connection structure can be an external threaded sleeve and a fastening bolt set at the lower part of the metal shell 43. After the external threaded sleeve of the metal shell 43 passes through the plate surface of the heating plate body 1, the fastening bolt is screwed on at the bottom to achieve fixation.

[0034] In other embodiments, the temperature probe 4 can also be a bottom-mounted temperature probe 4 fixed on the upper coupler 6, with the bottom-mounted temperature probe 4 abutting against the bottom surface of the heating plate body 1.

[0035] An insulating element 5 is provided between the metal outer shell 43 and the heating plate body 1, which provides insulation between the metal outer shell 43 and the heating plate body 1. The insulating element 5 for both the metal outer shell 43 and the water level probe 3 is a silicone sleeve, which is fitted onto the lower part of the metal outer shell 43 or the lower part of the water level probe 3. The main purpose is to isolate the water level probe 3 by creating a certain height H, which is preferably between 5mm and 10mm. In addition to its insulating function, the silicone sleeve also serves as a seal, sealing the gap between the metal outer shell 43 or the water level probe 3 and the heating plate body 1 to prevent water leakage.

[0036] The upper coupler 6 includes an upper coupling seat 67 and a metal connecting plate 68 connected to the top surface of the upper coupling seat 67. The plurality of conductive rings also include a neutral wire conductive ring 64, a live wire conductive ring 65 and a ground wire conductive ring 66. The metal connecting plate 68 is electrically connected to the ground wire conductive ring 66. The two extreme ends of the heating plate body 1 are electrically connected to the neutral wire conductive ring 64 and the live wire conductive ring 65, respectively.

[0037] In addition, at least one set of anti-dry-burning switches (composed of moving contact and stationary contact) is provided on the top surface of the upper coupling seat 67. The anti-dry-burning switches are connected in series between the heating plate body 1 and the neutral wire conductive ring 64 or / and the live wire conductive ring 65. Furthermore, anti-dry-burning devices (such as bimetallic strips or hot melt particles) are provided on the metal connecting plate 68 corresponding to the anti-dry-burning switches.

[0038] The upper coupler 6 has a central channel, and the heating plate body 1 has a clearance hole corresponding to the central channel. A water inlet valve core 7 is installed in the central channel, and the water outlet end of the water inlet valve core 7 extends out of the upper side of the clearance hole; so that the electric kettle has a bottom water inlet function, or also has a bottom water outlet function.

[0039] The heating plate body 1 has one or two mounting ports 201 on its surface 2, and a module base 8 is detachably connected to the mounting port 201. See [reference] Figure 5 As shown, the two sets of water level probes 3 and the paired insulating parts 5 are each connected to a module base 8. This structure allows for independent disassembly and quick repair or replacement even if one of the water level probes 3 is damaged.

[0040] Or see Figure 6 As shown, the two sets of water level probes 3 and the paired insulating parts 5 are connected together on a module base 8; this structure enables the module base 8 and the two sets of water level probes 3 to form a modular system, which can be installed or disassembled together, thereby improving production efficiency.

[0041] The module base 8 of the above structure is made of metal or plastic material, so that a robust threaded structure, and / or snap-fit ​​structure, and / or fastening structure can be formed. The module base 8 is fixed on the plate surface 2 of the heating plate body 1, so that the water level probe 3 and the paired insulating part 5 can be installed on the heating plate body 1, which can facilitate assembly and improve production efficiency.

[0042] Or, see Figure 7 As shown, the module base 8 is composed of insulating parts 5 made of hard plastic or silicone. The two sets of water level probes 3 are connected to the insulating parts 5 to achieve modular quick assembly and disassembly.

[0043] 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 to this utility model without departing from its spirit and scope, 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 heating plate with water level detection, comprising a heating plate body, characterized in that: Two sets of water level detection needles are connected to the surface of the heating plate body. The two sets of water level detection needles are respectively connected to a water level input signal line and a water level output signal line. An insulating component is provided between the water level detection needles and the heating plate body. The conductive part of the water level detection needle is placed on the upper side of the insulating component and is insulated from the surface of the heating plate body by a certain height. The two sets of water level detection needles are connected by water above the insulating component to form a water level detection circuit to realize the water level detection function.

2. A heating plate with water level detection according to claim 1, characterized in that: A temperature sensor is also connected to the surface of the heating plate body, and the temperature sensor is connected to a temperature input signal line and a temperature output signal line.

3. A heating plate with water level detection according to claim 2, characterized in that: The bottom surface of the heating plate body is equipped with an upper coupler. The upper coupler contains multiple concentric conductive rings of different diameters. The temperature sensing input signal line and temperature sensing output signal line on the temperature sensing probe, as well as the water level input signal line and water level output signal line of the two sets of water level detection needles, are electrically connected to the conductive rings.

4. A heating plate with water level detection according to claim 3, characterized in that: The plurality of conductive rings includes a first conductive ring, a second conductive ring, and a third conductive ring. The temperature sensing input signal line is electrically connected to the first conductive ring, the water level input signal line is connected to the second conductive ring, and the temperature sensing output signal line and the water level output signal line are electrically connected together to the third conductive ring.

5. A heating plate with water level detection according to claim 2, characterized in that: The temperature sensing probe includes a metal shell and a thermistor. The metal shell is fixed to the upper side of the disk by a connecting structure. A temperature sensing cavity is provided inside the metal shell. The thermistor is placed inside the temperature sensing cavity and is against or close to the metal shell.

6. A heating plate with water level detection according to claim 5, characterized in that: An insulating component is provided between the metal outer shell and the heating plate body; the insulating component is a silicone sleeve, which is fitted onto the lower part of the metal outer shell or the lower part of the water level probe.

7. A heating plate with water level detection according to claim 3 or 4, characterized in that: The upper coupler includes an upper coupling seat and a metal connecting plate connected to the top surface of the upper coupling seat. The plurality of conductive rings also include a neutral conductive ring, a live conductive ring, and a ground conductive ring. The metal connecting plate is electrically connected to the ground conductive ring. The two extreme ends of the heating plate body are electrically connected to the neutral conductive ring and the live conductive ring, respectively.

8. A heating plate with water level detection according to claim 3, characterized in that: The upper coupler has a central channel, and the heating plate body has a clearance hole corresponding to the central channel. A water inlet valve core is installed in the central channel, and the water outlet end of the water inlet valve core extends out of the upper side of the clearance hole.

9. A heating plate with water level detection according to claim 1, characterized in that: The heating plate body has one or two mounting holes on its surface. A module base is detachably connected to each mounting hole. The two sets of water level probes and the paired insulating parts are each connected to a module base. Alternatively, the two sets of water level probes and the paired insulating parts are connected to a module base. Or, the module base is an insulating part, and the two sets of water level probes are connected to the insulating part.

10. An electric kettle, characterized in that: The electric kettle is equipped with a heating plate with water level detection as described in any one of claims 1-9.

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