Temperature controller and heating disc module

Abstract

The utility model relates to a kind of temperature controller and heating disc module, including upper connecting seat and dry burning prevention device, the upper connecting seat is provided with strong electric conducting circuit and weak electric conducting circuit, dry burning prevention switch is connected in series on strong electric conducting circuit, the dry burning prevention device is adjacent or abutting with dry burning prevention switch, dry burning prevention device promotes dry burning prevention switch when overtemperature, to disconnect strong electric conducting circuit, first NTC probe for detecting water temperature effect and second NTC probe for detecting heating disc ambient temperature effect are provided on the upper connecting seat, the first NTC probe and second NTC probe are connected in series on weak electric conducting circuit; heating disc uses this temperature controller, combines the NTC probe for two temperature measurement to same temperature controller, so that electric heating container does not need to increase temperature sensing probe externally to receive temperature signal, can save production cost and reduce assembly process.

Description

Technical Field

[0001] This utility model relates to the field of electrical connectors, specifically a temperature controller and heating plate module. Background Technology

[0002] Current connector structures are illustrated in Chinese patent document, application number 202321431366.5, which discloses a bottom-mounted water-filled electrical connector. This connector includes a connecting base and a mounting bracket. The mounting bracket extends outwards with an elastic arm, the end of which is equipped with a temperature sensor. After the electrical connector is installed on the bottom of the heating plate, the temperature sensor is in close contact with the bottom of the all-glass container to detect the internal water temperature. However, in addition to this, a 301 snap-action thermostat is needed to control the heating plate temperature, or an external temperature sensor is added to receive the temperature signal, which is then controlled via a circuit board. The purpose is to control the heating plate temperature, prevent overheating, and avoid the glass shattering due to high temperatures, which would seriously affect consumer safety. However, this method increases production costs and assembly processes, reducing production efficiency. Therefore, a new thermostat and heating plate module are needed to solve these problems. Utility Model Content

[0003] The purpose of this utility model is to solve the above-mentioned existing problems and provide a temperature controller and heating plate module with a simple and reasonable structure.

[0004] A thermostat includes an upper connector and an anti-dry-burning device. The upper connector is provided with a high-voltage conductive line and a low-voltage conductive line. An anti-dry-burning switch is connected in series on the high-voltage conductive line. The anti-dry-burning device is adjacent to or cooperates with the anti-dry-burning switch. When the temperature exceeds the limit, the anti-dry-burning device pushes the anti-dry-burning switch to disconnect the high-voltage conductive line. The upper connector is provided with a first NTC probe for detecting water temperature and a second NTC probe for detecting the ambient temperature of the heating element. The first NTC probe and the second NTC probe are connected in series on the low-voltage conductive line.

[0005] The objective of this utility model can also be achieved by the following technical measures: As a more specific embodiment, the weak current conduction circuit is provided with a first signal electrode and a second signal electrode, one lead of the first NTC probe is connected to the first signal electrode, and the other lead of the first NTC probe is connected to the second signal electrode. The upper connector is also provided with a grounding electrode. One lead of the second NTC probe is connected to the second signal electrode, and the other lead of the second NTC probe is connected to the grounding electrode.

[0006] As a further solution, a water level detection device is also included, and the weak current conduction line is also provided with a third signal electrode, with the lead wire of the water level detection device connected to the third signal electrode.

[0007] As a further embodiment, the upper connecting seat includes a seat body and a heat-conducting plate connected to the top surface of the seat body. The high-voltage conductive lines and low-voltage conductive lines are arranged on the seat body, and the anti-dry-burning device, the first NTC probe, and the second NTC probe are fixedly connected to the heat-conducting plate.

[0008] As a further embodiment, the base is provided with a coupling insertion cavity, and the coupling insertion cavity is provided with a central conductive post and several concentric conductive rings of different diameters; Two conductive rings form the neutral wire electrode and the live wire electrode, and are connected in series on the high-voltage conductive line. The other conductive ring or the central conductive post forms the grounding electrode. At least two conductive rings constitute two of the first signal electrode, the second signal electrode, and the third signal electrode, and the remaining conductive ring or the central conductive post constitutes the remaining signal electrode.

[0009] As a further embodiment, the first position and the second position on the heat-conducting plate are respectively provided with a first clamp and a second clamp, and the outer peripheral sleeves of the first NTC probe and the second NTC probe are both provided with silicone heat insulation sleeves, and are respectively laterally clamped into the first clamp and the second clamp by interference fit of the silicone heat insulation sleeves.

[0010] As a further embodiment, the anti-dry-burning device includes a circular bimetallic strip and an insulating rod. The circular bimetallic strip has a curved surface structure with lower edges and higher center. Its actuating end is located in the center and forms a dynamic contact with the anti-dry-burning switch through the insulating rod. The heat-conducting plate has a circular through hole for exposing the circular bimetallic strip. A metal cap is provided around the circular through hole, and the circular bimetallic strip is encapsulated in the circular through hole by the metal cap.

[0011] As a further embodiment, the low-voltage conduction circuit also includes a terminal block one connected to the first signal electrode and a terminal block two connected to the second signal electrode. The terminal blocks one and two extend outward in the direction of the first position, and the two leads of the first NTC probe are respectively connected to the terminal blocks one and the terminal blocks two.

[0012] As a further embodiment, the grounding electrode is provided with a grounding terminal, which is located on the opposite side of the first position; the weak current conduction line also includes a terminal three connected to the second signal electrode and a terminal four connected to the third signal electrode. Terminal three and terminal four are respectively located on the left and right sides of the grounding terminal, with the second position corresponding to terminal three. The two leads of the second NTC probe are respectively connected to the grounding terminal and terminal three.

[0013] The purpose of this utility model is achieved as follows: A heating plate module includes a heating plate for attaching to the bottom surface of an all-glass kettle body. The heating plate includes a heat-conducting plate and a heating tube connected to the bottom surface of the heat-conducting plate. A temperature controller with the structure described above is fastened to the bottom surface of the heat-conducting plate. The heat-conducting plate has a clearance hole corresponding to the first NTC probe. The first NTC probe passes through the clearance hole and is closely attached to the bottom surface of the all-glass pot body. The second NTC probe is closely attached to the bottom surface of the heat-conducting plate.

[0014] The beneficial effects of this utility model are as follows: This utility model discloses a temperature controller and heating plate module. The heating plate uses this temperature controller, which combines two NTC probes for temperature measurement into the same temperature controller. The electric heating container does not need to add an external temperature sensing probe to receive temperature signals, which can save production costs and reduce assembly processes. This allows the functions of the temperature controller to be further integrated, thereby improving the market competitiveness of the temperature controller product. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the temperature controller structure in this utility model.

[0016] Figure 2 This is a schematic diagram of the electrical connection principle of each component in this utility model.

[0017] Figure 3 This is an exploded view of the temperature controller in this utility model.

[0018] Figure 4 This is a schematic diagram of the temperature controller in this utility model from another angle.

[0019] Figure 5 This is a schematic diagram of the arrangement of the terminals in this utility model.

[0020] Figure 6 This is a schematic diagram of the heating plate module structure in this utility model.

[0021] Figure 7 This is a schematic diagram of another embodiment of the second NTC probe in this utility model. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] First embodiment: refer to Figures 1 to 5As shown, a thermostat includes an upper connector 1 and an anti-dry-burning device 2. The upper connector 1 is provided with a high-voltage conductive line and a low-voltage conductive line. An anti-dry-burning switch 3 is connected in series on the high-voltage conductive line. The anti-dry-burning device 2 is adjacent to or cooperates with the anti-dry-burning switch 3. When the temperature exceeds the limit, the anti-dry-burning device 2 pushes the anti-dry-burning switch 3 to disconnect the high-voltage conductive line. The upper connector 1 is provided with a first NTC probe 4 for detecting water temperature and a second NTC probe 5 for detecting the ambient temperature of the heating plate A. The first NTC probe 4 and the second NTC probe 5 are connected in series on the low-voltage conductive line.

[0024] Heating plate A uses this temperature controller, which combines two NTC probes for temperature measurement into one temperature controller. This eliminates the need for an external temperature sensor to receive temperature signals in the electric heating container, saving production costs and reducing assembly steps. It also allows for further integration of the temperature controller's functions, enhancing the market competitiveness of the temperature controller product.

[0025] The weak current conduction circuit is provided with a first signal electrode D1 and a second signal electrode D2. One lead of the first NTC probe 4 is connected to the first signal electrode D1, and the other lead of the first NTC probe 4 is connected to the second signal electrode D2. The upper connector 1 is also provided with a ground electrode E. One lead of the second NTC probe 5 is connected to the second signal electrode D2, and the other lead of the second NTC probe 5 is connected to the ground electrode E. The first NTC probe 4 of this structure uses two conventional borrowed signal electrodes for lead-out, while the lead-out line of the second NTC probe 5 shares a common electrode with the first NTC probe 4, and the other lead-out line borrows the ground electrode E. By cleverly utilizing the existing structure, the temperature controller can simultaneously satisfy the requirement of forming a signal detection loop with two sets of NTC probes while maintaining the conventional number of electrodes.

[0026] It also includes a water level detection device 6, and the weak current conduction line is also provided with a third signal electrode D3. The lead wire of the water level detection device 6 is connected to the third signal electrode D3; so that the temperature controller can also have a low water level detection function. The water level detection device 6 is led out using the third signal electrode D3 alone to reduce interference.

[0027] The upper connecting base 1 includes a base body 7 and a heat-conducting plate 8 connected to the top surface of the base body 7. The high-voltage conductive line and the low-voltage conductive line are set on the base body 7. The anti-dry burning device 2, the first NTC probe 4 and the second NTC probe 5 are fixedly connected to the heat-conducting plate 8. This integrates anti-dry burning detection and temperature detection onto the heat-conducting plate 8, resulting in a simple structure and quick assembly.

[0028] The base 7 is provided with a coupling insertion cavity 701, and the coupling insertion cavity 701 is provided with a central conductive post 71 and several concentric conductive rings 72 with different diameters; Specifically, two of the conductive rings 72 constitute the neutral wire electrode and the live wire electrode, and are connected in series on the high-voltage conductive line, while the other conductive ring 72 constitutes the grounding electrode E. The remaining two conductive rings 72 constitute the second signal electrode D2 and the third signal electrode D3, and the central conductive post 71 constitutes the first signal electrode D1.

[0029] An elastic support arm 81 extends outward from the first position on the heat-conducting plate 8. The end of the elastic support arm 81 is provided with a first clamping opening 801 in the shape of a "U". A second clamping opening 802 is provided at the second position on the heat-conducting plate 8. The second clamping opening 802 is provided on a recessed positioning platform. The outer periphery of the first NTC probe 4 and the second NTC probe 5 are both provided with silicone heat insulation sleeves 9, and are respectively laterally clamped into the first clamping opening 801 and the second clamping opening 802 by interference fit through the silicone heat insulation sleeves 9. The first NTC probe 4, through the elastic support arm 81, ensures that its temperature sensing end face is always in close contact with the bottom surface of the all-glass pot, so that the first NTC probe 4 can accurately sense the temperature, while the silicone heat insulation sleeve 9 can block the heat of the heat-conducting plate 8 from the first NTC probe 4 and the second NTC probe 5, reducing interference factors.

[0030] The anti-dry-burning device 2 includes a circular bimetallic strip 21 and an insulating rod 22. The circular bimetallic strip 21 has a curved surface structure with lower edges and higher center. Its actuating end is located in the center and forms a dynamic contact with the anti-dry-burning switch 3 through the insulating rod 22. The heat-conducting plate 8 has a circular through hole 803 for exposing the circular bimetallic strip 21. A metal cap 23 is provided around the circular through hole 803. The circular bimetallic strip 21 is encapsulated in the circular through hole 803 by the metal cap 23. The original horseshoe-shaped bimetallic strip is replaced by a circular bimetallic strip 21, which increases the temperature sensing temperature of the bimetallic strip and makes the thermostat suitable for use with an all-glass kettle. Moreover, the circular bimetallic strip 216 of this structure can reduce the processing precision of the heat-conducting plate 8, improve production efficiency, and thus reduce labor costs. The highest temperature sensing value of the circular bimetallic strip 21 can reach 240°, enabling the circular bimetallic strip 21 to function as a high-temperature plate.

[0031] The metal cap 23 is integrally stamped from aluminum or aluminum alloy. Aluminum has excellent thermal conductivity, and the metal cap 23 acts as a heat conductor to accelerate the thermal conductivity and temperature sensing of the circular bimetallic strip 21.

[0032] The weak current conduction circuit also includes a terminal 73 connected to the first signal electrode D1 and a terminal 74 connected to the second signal electrode D2. The terminal 73 and the terminal 74 extend outward in the direction of the first position. The two leads of the first NTC probe 4 are respectively connected to the terminal 73 and the terminal 74. The high-voltage conductive circuit includes a neutral wire terminal 75 and a live wire terminal 76 connected to the anti-dry-burning switch 3 (which consists of a moving contact and a stationary contact, with an insulating rod 22 adjacent to or abutting against the moving contact). The outward extension direction of the neutral wire terminal and the live wire terminal 76 is consistent with that of terminal 1 73 and terminal 2 74, and terminal 1 73 and terminal 2 74 are spaced apart between the neutral wire terminal 75 and the live wire terminal 76.

[0033] The grounding electrode E is provided with a grounding terminal 77, which is located on the opposite side of the first position. The weak current conduction line also includes a third terminal 78 connected to the second signal electrode D2 and a fourth terminal 79 connected to the third signal electrode D3. The third terminal 78 and the fourth terminal 79 are respectively located on the left and right sides of the grounding terminal 77. The second position corresponds to the third terminal 78. The two leads of the second NTC probe 5 are respectively connected to the grounding terminal 77 and the third terminal 78.

[0034] The wiring sections of the first NTC probe 4 and the second NTC probe 5 are arranged on the opposite side of the temperature controller. This makes the wiring position clearer and shortens the length of the lead wire, preventing assembly personnel from making mistakes and reducing their workload.

[0035] The purpose of this utility model is achieved as follows: A heating plate module, for reference Figure 6 As shown, it includes a heating plate A for attaching to the bottom surface of the all-glass kettle body. The heating plate A includes a heat-conducting plate 10 and a heating tube 11 connected to the bottom surface of the heat-conducting plate 10. A thermostat B with the structure described above is fastened to the bottom surface of the heat-conducting plate 10. The heat-conducting plate 10 has a clearance hole 101 corresponding to the first NTC probe 4. The first NTC probe 4 passes through the clearance hole 101 and is closely attached to the bottom surface of the all-glass kettle body. The second NTC probe 5 is closely attached to the bottom surface of the heat-conducting plate 10. The thermostat is installed on the heating plate A, so that the first NTC probe 4 can directly detect the water temperature, while the second NTC probe 5 can detect the ambient temperature of the heating plate A, thus preventing the heating plate A from overheating.

[0036] Second embodiment: The main difference in the second embodiment lies in the structure of the second NTC probe 5, as detailed below. Figure 7As shown: The second NTC probe 5 includes a thermistor 51 and an insulating sleeve 52. The thermistor 51 is embedded in the insulating sleeve 52, and the length of the insulating sleeve 52 also covers part of the lead wires at both ends of the thermistor 51. Furthermore, a second elastic support arm 82 extends outward from the second position on the heat-conducting plate 8. The end of the second elastic support arm 82 is continuously bent to form a receiving recess 821 that can restrict forward and backward movement. The thermistor 81 is placed in the receiving recess 821.

[0037] 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 thermostat, comprising an upper connector and an anti-dry-burning device, wherein the upper connector is provided with a high-voltage conductive line and a low-voltage conductive line, an anti-dry-burning switch is connected in series on the high-voltage conductive line, and the anti-dry-burning device is adjacent to or abuts against the anti-dry-burning switch; the anti-dry-burning device actuates the anti-dry-burning switch to disconnect the high-voltage conductive line when the temperature exceeds the limit, characterized in that: The upper connector is equipped with a first NTC probe for detecting water temperature and a second NTC probe for detecting the ambient temperature of the heating plate. The first NTC probe and the second NTC probe are connected in series on the low-voltage conduction line.

2. A temperature controller according to claim 1, characterized in that: The weak current conduction circuit is provided with a first signal electrode and a second signal electrode. One lead of the first NTC probe is connected to the first signal electrode, and the other lead of the first NTC probe is connected to the second signal electrode. The upper connector is also provided with a grounding electrode. One lead of the second NTC probe is connected to the second signal electrode, and the other lead of the second NTC probe is connected to the grounding electrode.

3. A temperature controller according to claim 2, characterized in that: It also includes a water level detection device, and the weak current conduction line is further provided with a third signal electrode, and the lead wire of the water level detection device is connected to the third signal electrode.

4. A temperature controller according to claim 3, characterized in that: The upper connecting base includes a base body and a heat-conducting plate connected to the top surface of the base body. The high-voltage conductive line and the low-voltage conductive line are arranged on the base body. The anti-dry burning device, the first NTC probe and the second NTC probe are fixedly connected to the heat-conducting plate.

5. A temperature controller according to claim 4, characterized in that: The base is provided with a coupling insertion cavity, and the coupling insertion cavity is provided with a central conductive post and several concentric conductive rings of different diameters; Two conductive rings form the neutral wire electrode and the live wire electrode, and are connected in series on the high-voltage conductive line. The other conductive ring or the central conductive post forms the grounding electrode. At least two conductive rings constitute two of the first signal electrode, the second signal electrode, and the third signal electrode, and the remaining conductive ring or the central conductive post constitutes the remaining signal electrode.

6. A temperature controller according to claim 4, characterized in that: The heat-conducting plate is provided with a first clamp and a second clamp at the first and second positions, respectively. The outer peripheral sleeves of the first NTC probe and the second NTC probe are both provided with silicone heat insulation sleeves, and are respectively laterally clamped into the first clamp and the second clamp by interference fit of the silicone heat insulation sleeves.

7. A temperature controller according to claim 4, characterized in that: The anti-dry-burning switch includes a circular bimetallic strip and an insulating rod. The circular bimetallic strip has a curved surface structure with low edges and high center. Its actuating end is located in the center and forms a moving contact with the anti-dry-burning switch through the insulating rod. The heat-conducting plate has a circular through hole for exposing the circular bimetallic strip. A metal cap is provided around the circular through hole, and the circular bimetallic strip is sealed in the circular through hole by the metal cap.

8. A temperature controller according to claim 6, characterized in that: The low-voltage conduction circuit also includes a terminal block one connected to the first signal electrode and a terminal block two connected to the second signal electrode. Terminal block one and terminal block two extend outward in the direction of the first position, and the two leads of the first NTC probe are respectively connected to terminal block one and terminal block two.

9. A temperature controller according to claim 6, characterized in that: The grounding electrode is provided with a grounding terminal, which is located on the opposite side of the first position; the weak current conduction line also includes a terminal three connected to the second signal electrode and a terminal four connected to the third signal electrode. Terminal three and terminal four are respectively located on the left and right sides of the grounding terminal. The second position corresponds to terminal three. The two leads of the second NTC probe are respectively connected to the grounding terminal and terminal three.

10. A heating plate module, comprising a heating plate for attaching to the bottom surface of an all-glass kettle body, the heating plate comprising a heat-conducting plate and a heating tube connected to the bottom surface of the heat-conducting plate, characterized in that: The bottom surface of the heat-conducting plate is fastened with a temperature controller as described in any one of claims 1-9; The heat-conducting plate has a clearance hole corresponding to the first NTC probe. The first NTC probe passes through the clearance hole and is closely attached to the bottom surface of the all-glass pot body. The second NTC probe is closely attached to the bottom surface of the heat-conducting plate.

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