Heating disc with double-function probe and electric kettle

Abstract

The utility model relates to a heating disc with a dual-function probe and an electric kettle, the heating disc comprises a heating disc body, the disc surface of the heating disc body is connected with a temperature sensing probe, the disc surface of the heating disc body is connected with a water level probe, the water level probe and the temperature sensing probe are arranged at an interval, and the water level probe is connected with a water level input signal line; the temperature sensing probe comprises a metal shell and a thermistor arranged in the metal shell, the thermistor is connected with a temperature sensing input signal line and a temperature sensing output signal line, the metal shell is connected with a water level output signal line, and the water level probe and the metal shell are communicated through a water body 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] The utility model relates to the field of electric kettle, concretely is a kind of heating disc and electric kettle with dual-function probe. BACKGROUND

[0002] The current electric kettle structure mainly includes kettle body and the heating disc assembled at the bottom of kettle body, a low water level probe is connected on the heating disc, the low water level probe forms insulation isolation between the outer sleeve into silica gel and heating disc, when working, one of low water level probe and heating disc serves as the input pole of water level detection circuit, the other of low water level probe and heating disc serves as the output pole of water level detection circuit, low water level probe and heating disc are communicated by water body, when water is lower than low water level probe, the circuit between the two is disconnected, triggers the water adding program of electric kettle.

[0003] But in the design, heating disc is also used as ground wire, in the latest safety requirements, the weak electric signal of electric kettle cannot be introduced by ground wire, this mode can affect the electric safety of electric heating equipment, does not meet the current safety requirements, and silica gel is boiled in hot water for a long time, scale is generated, low water level probe and heating disc are easily connected, so that water level control fails, therefore, the water level detection structure on heating disc needs to be further improved. CONTENT OF UTILITY MODEL

[0004] The utility model aims at solving the above-mentioned problems, and provides a kind of heating disc and electric kettle with dual-function probe with simple structure and reasonable.

[0005] A kind of heating disc with dual-function probe, including heating disc body, temperature sensing probe is connected on the disc face of heating disc body, water level detection needle is connected on the disc face of heating disc body and is spaced apart from temperature sensing probe, and water level input signal line is connected to water level detection needle;Temperature sensing probe includes metal shell and thermistor placed in metal shell, thermistor is connected with temperature sensing input signal line and temperature sensing output signal line, and water level output signal line is connected to metal shell, water level detection circuit is formed by the water body communication between water level detection needle and metal shell, for realizing water level detection function.

[0006] The purpose of the utility model can also be solved by the following technical measures:

[0007] As more specific scheme, silica gel insulating sleeve is arranged between water level detection needle and metal shell and heating disc body, the conductive part of water level detection needle and metal shell is placed on the upper side of silica gel insulating sleeve and is insulated and spaced apart from the disc face of heating disc body by a certain height, when water body is higher than silica gel insulating sleeve, water level detection circuit is formed by the communication of water level detection needle and metal shell.

[0008] As a further scheme, the bottom surface of the heating disc body is equipped with an upper coupling device, and a plurality of concentric conductive rings with different diameters are arranged in the upper coupling device.

[0009] As a further scheme, the plurality of conductive rings include 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 electrically connected to the second conductive ring, and the temperature sensing output signal line and the water level output signal line are electrically connected to the third conductive ring.

[0010] As a further scheme, the lower part of the metal shell is provided with an external thread sleeve extending downward from the disc surface, the metal shell is screwed into a fastening nut on the upper side of the disc surface through the external thread sleeve, and the upper part of the metal shell is provided with a temperature sensing cavity, and the thermistor is arranged in the temperature sensing cavity and abuts or approaches the metal shell.

[0011] As a further scheme, the upper coupling device 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 further include a zero line conductive ring, a fire line conductive ring and a ground line conductive ring, the metal connecting plate is electrically connected to the ground line conductive ring, and the two ends of the heating disc body are electrically connected to the zero line conductive ring and the fire line conductive ring respectively.

[0012] As a further scheme, a central passage is formed in the upper coupling device, a avoiding through hole is formed in the heating disc body corresponding to the central passage, and a water inlet valve core is arranged in the central passage, and the water outlet end of the water inlet valve core extends out of the upper side of the avoiding through hole.

[0013] As a further scheme, one or two mounting holes are formed in the disc surface of the heating disc body, and a module seat is detachably connected in the mounting hole, the temperature sensing probe and the water level detection needle are respectively connected to a module seat of a pair of silica gel insulation sleeves, or the temperature sensing probe and the water level detection needle are connected to a module seat of a pair of silica gel insulation sleeves, or the module seat is composed of a silica gel insulation sleeve, and the temperature sensing probe and the water level detection needle are connected to the silica gel insulation sleeve.

[0014] The utility model discloses the purpose is realized as follows:

[0015] An electric kettle is equipped with the heating disc with the double-function probe.

[0016] The utility model discloses the beneficial effect is as follows:

[0017] The utility model discloses a kind of heating disc and electric kettle of dual-function probe, the structure heating disc makes water level detection not need to borrow ground wire to form loop, ensure that water level detection loop is completely separated from ground wire, effectively solve the weak signal needs of grounding of safety regulation, ensure that heating disc is not powered, improve the safety of electric heating equipment, and meet the requirement of safety regulation. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is cross-sectional structure schematic diagram of electric kettle in the utility model.

[0019] Figure 2 It is water level detection needle and temperature sensing probe mounting structure schematic diagram in the utility model.

[0020] Figure 3 It is disc surface structure schematic diagram of heating disc body in the utility model.

[0021] Figure 4 It is upper coupler structure schematic diagram in the utility model.

[0022] Figure 5 It is water level detection needle and temperature sensing probe mounting structure schematic diagram in the utility model Figure 1 .

[0023] Figure 6 It is water level detection needle and temperature sensing probe mounting structure schematic diagram in the utility model Figure 2 .

[0024] Figure 7 It is water level detection needle and temperature sensing probe mounting structure schematic diagram in the utility model Figure 3 . DETAILED DESCRIPTION

[0025] The utility model is further explained in connection with drawing and embodiment.

[0026] Referring to Figures 1 to 3 It is electric kettle, and the electric kettle A is equipped with the above-mentioned heating disc of dual-function probe, and the heating disc includes heating disc body 1, the disc surface 2 of the heating disc body 1 is connected with temperature sensing probe 4, the disc surface 2 of the heating disc body 1 is connected with water level detection needle 3 that is arranged at interval with temperature sensing probe 4, and water level input signal line 31 is connected to the water level detection needle 3;Temperature sensing probe 4 includes metal shell 43 and thermistor 44 in metal shell 43, and thermistor 44 is connected with temperature sensing input signal line 41 and temperature sensing output signal line 42, and water level output signal line 45 is connected to the metal shell 43, water level detection loop is formed by the water body between water level detection needle 3 and metal shell 43, for realizing water level detection function.

[0027] The structure of the heating disc makes the water level detection not need to borrow the ground wire to form a loop, ensures that the water level detection loop is completely separated from the ground wire, effectively solves the need of weak signal not grounding, ensures that the heating disc is not powered, improves the safety of the electric heating equipment, and meets the safety requirements.

[0028] The water level detection needle 3 and the metal shell 43 are provided with a silica gel insulation sleeve 5 between the heating disc body 1, and the conductive part of the water level detection needle 3 and the metal shell 43 is insulated and spaced apart from the disc surface 2 of the heating disc body 1 by a certain height H on the upper side of the silica gel insulation sleeve 5, and the height H is preferably between 5mm-10mm;

[0029] The silica gel insulation sleeve 5 can also play a sealing role in addition to the insulation function, sealing the gap between the metal shell 43 or the water level detection needle 3 and the heating disc body 1, preventing water leakage; when the water body is higher than the silica gel insulation sleeve 5, the water level detection needle 3 and the metal shell 43 are connected to form a water level detection loop;

[0030] The height of the conductive part of the water level detection needle 3 and the metal shell 43 is increased by the silica gel insulation sleeve 5, thereby increasing the creepage distance of the two conductive parts, so that the low water level judgment program of the electric kettle does not need to completely pour out the small amount of accumulated water in the kettle to start.

[0031] The bottom surface of the heating disc body 1 is assembled and connected with an upper coupler 6, a plurality of concentric but different diameter conductive rings are arranged in the upper coupler 6, the temperature sensing input signal line 41 and the temperature sensing output signal line 42 of the thermistor 44, the water level output signal line 45 of the metal shell 43 and the water level input signal line 31 of the water level detection needle 3 are electrically connected to the conductive rings; the thermistor 44 receives and outputs signals through the temperature sensing input signal line 41 and the temperature sensing output signal line 42, and the water level detection needle 3 and the metal shell 43 form a water level detection loop through the water level input signal line 31 and the water level output signal line 32.

[0032] The plurality of 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 45 are electrically connected to the third conductive ring 63;

[0033] The water level output signal and the temperature sensing output signal share a conductive ring, and the water level output signal and the temperature sensing output signal use weak current output, so they do not interfere with each other during use, and in the case of ensuring the same function, the number of conductive rings can be maximized to effectively reduce the vertical and horizontal volume of the entire upper coupler 6.

[0034] The lower part of the metal shell 43 is provided with an external thread sleeve 431 extending out of the lower side of the disc surface 2, the metal shell 43 is screwed into the external thread sleeve 431 and fixed on the upper side of the disc surface 2 by a fastening nut 432, the upper part of the metal shell 43 is provided with a temperature sensing cavity 401, the thermistor 44 is arranged in the temperature sensing cavity 401 and abuts or approaches the metal shell 43; the temperature sensing probe 4 with the structure has simple structure, convenient installation, improved production efficiency, and is easy to disassemble, thereby simplifying maintenance and replacement operation.

[0035] The upper coupling device 6 comprises 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 further comprises a zero line conductive ring 64, a live line conductive ring 65 and a ground line conductive ring 66, the metal connecting plate 68 is electrically connected to the ground line conductive ring 66, and the two ends of the heating disc body 1 are electrically connected to the zero line conductive ring 64 and the live line conductive ring 65 respectively.

[0036] In addition, at least one set of dry burning prevention switches (composed of a moving contact and a stationary contact) is arranged on the top surface of the upper coupling seat 67, the dry burning prevention switches are connected in series between the heating disc body 1 and the zero line conductive ring or / and the live line conductive ring, and a dry burning prevention device (such as a bimetallic strip or a heat melting particle) is arranged on the metal connecting plate 68 corresponding to the dry burning prevention switches.

[0037] A central passage is formed in the upper coupling device 6, an avoiding through hole is formed in the disc surface 2 of the heating disc body 1 corresponding to the central passage, and a water inlet valve core 7 is installed in the central passage, the water outlet end of the water inlet valve core 7 extends out of the upper side of the avoiding through hole; the electric kettle has a bottom water inlet function, or also has a bottom water outlet function.

[0038] One or two mounting holes 201 are formed in the disc surface 2 of the heating disc body 1, and a module seat 8 is detachably connected in the mounting hole 201, as shown in Figure 5 The temperature sensing probe 4 and the water level detection needle 3 are respectively connected to a module seat 8 corresponding to the silicone insulation sleeve 5, and the structure can be independently disassembled for quick maintenance and replacement when the water level detection needle 3 or the temperature sensing probe 4 is damaged.

[0039] Alternatively, as shown in Figure 6 The temperature sensing probe 4 and the water level detection needle 3 are connected to a module seat 8 corresponding to the silicone insulation sleeve 5; the structure can form a module with the module seat 8, the water level detection needle 3 and the temperature sensing probe 4, and can be installed or disassembled together, thereby improving production efficiency.

[0040] The module seat 8 of the structure is made of metal or plastic material, so that a firm threaded structure, or / and a clamping structure, or / and a fastening structure can be formed, and the module seat 8 is fixed on the disc surface 2 of the heating disc body 1 by the structure, so that the temperature probe 4 and the water level detecting needle 3 and the matched silica gel insulation sleeve 5 are installed on the heating disc body 1, and assembly is convenient, and production efficiency is improved.

[0041] Alternatively, referring to Figure 7 As shown in the figure, the module seat 8 is the silica gel insulation sleeve 5, and the temperature probe 4 and the water level detecting needle 3 are connected to the silica gel insulation sleeve 5, so that quick assembly and disassembly are realized.

[0042] The above is the preferred scheme of the utility model, and the basic principle, main features and advantages of the utility model are shown and described. Those skilled in the art should understand that the utility model is not limited by the above examples, and the above examples and the description in the specification are only for illustrating the principle of the utility model. The utility model can have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the appended claims and equivalents.

Claims

1. A heating plate with a dual-function probe, comprising a heating plate body, wherein a temperature sensing probe is connected to the surface of the heating plate body, characterized in that: A water level detection needle is connected to the surface of the heating plate body at a distance from the temperature sensing probe. The water level detection needle is connected to a water level input signal line. The temperature sensing probe includes a metal shell and a thermistor placed inside the metal shell. The thermistor is connected to a temperature sensing input signal line and a temperature sensing output signal line. The metal shell is connected to a water level output signal line. The water level detection needle and the metal shell are connected by water to form a water level detection loop, which is used to realize the water level detection function.

2. A heating plate with a dual-function probe according to claim 1, characterized in that: A silicone insulating sleeve is provided between the water level probe and the metal shell and the heating plate body. The conductive parts of the water level probe and the metal shell are placed on the upper side of the silicone insulating sleeve and are insulated from the plate surface of the heating plate body by a certain height. When the water body is higher than the silicone insulating sleeve, the water level probe and the metal shell are connected to form a water level detection circuit.

3. A heating plate with a dual-function probe according to claim 1, 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 of the thermistor, the water level output signal line of the metal shell, and the water level input signal line of the water level probe are electrically connected to the conductive rings.

4. A heating plate with a dual-function probe 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 a dual-function probe according to claim 1, characterized in that: The lower part of the metal casing is provided with an external threaded sleeve that extends out of the lower side of the disc. The metal casing is fixed to the upper side of the disc by screwing the external threaded sleeve into a fastening nut. The upper part of the metal casing is provided with a temperature sensing cavity. The thermistor is placed in the temperature sensing cavity and is abutting or close to the metal casing.

6. A heating plate with a dual-function probe 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.

7. A heating plate with a dual-function probe 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.

8. A heating plate with a dual-function probe according to claim 2, 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 temperature probe and the water level probe are each connected to a matching silicone insulating sleeve on a module base. Alternatively, the temperature probe and the water level probe are connected to a matching silicone insulating sleeve on a module base. Or, the module base is composed of a silicone insulating sleeve, and the temperature probe and the water level probe are connected to the silicone insulating sleeve.

9. 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 1-8.

Images