CN210425147U

CN210425147U - Overheat temperature protection device and induction cooker

Info

Publication number: CN210425147U
Application number: CN201921389783.1U
Authority: CN
Inventors: 孙鹏刚; 赵礼荣; 袁勇
Original assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Current assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2020-04-28
Anticipated expiration: 2029-08-26

Abstract

The embodiment of the utility model provides an overheat temperature protection device and electromagnetism stove, this overheat temperature protection device includes: a mounting bracket (10), a thermistor (20), and a thermal fuse (30), wherein the thermistor (20) and the thermal fuse (30) are disposed on the mounting bracket (10); a heat conducting space is arranged between the thermistor (20) and the thermal fuse (30). The utility model discloses can guarantee thermistor and thermal fuse's temperature measurement accuracy.

Description

Overheat temperature protection device and induction cooker

Technical Field

The embodiment of the utility model provides a relate to household electrical appliances technical field, especially relate to an overheat temperature protection device and electromagnetism stove.

Background

The induction cooker is a common household appliance for heating, and when the induction cooker works, high-frequency alternating current is utilized to pass through the coil panel so as to enable the bottom of a pot placed on the induction cooker to generate eddy current, so that the pot arranged on the induction cooker is heated.

In order to avoid danger caused by overheating in the heating process of the induction cooker, in the prior art, a thermistor and a thermal fuse are arranged below a panel of the induction cooker to realize double protection measures. For example, the utility model of chinese patent No. CN201062819Y discloses a dual overheat temperature protection device for an induction cooker. Fig. 1 is a schematic diagram of a dual overheat temperature protection device for an induction cooker provided in the prior art, as shown in fig. 1, a base 3 is arranged between a ceramic panel 4 and a coil support 5, a thermistor 1 and a thermal protector 2 are arranged in the base 3 in parallel, the thermistor 1 and the thermal protector 2 are tightly attached to the lower surface of the ceramic panel 4, the thermistor 1 is connected with a main circuit board, and the thermal protector 2 is connected with a power supply.

However, the temperature measurement of the existing thermistor and thermal fuse is not accurate enough, and the existing thermistor and thermal fuse cannot well protect the induction cooker.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides an overheat temperature protection device and electromagnetism stove can guarantee thermistor and thermal fuse's temperature measurement accuracy.

In a first aspect, the present invention provides an overheat protection device, including: mounting bracket, thermistor and thermal fuse, wherein

The thermistor and the thermal fuse are disposed on the mounting bracket;

a heat conduction space is arranged between the thermistor and the thermal fuse.

The overheat temperature protection device provided by the embodiment is arranged on the mounting bracket through the thermistor and the thermal fuse; be provided with the heat conduction space between thermistor and the thermal fuse for can carry out the heat transfer between thermistor and the thermal fuse, thereby make the two measure same temperature space, guarantee that the two carries out abundant measurement to the temperature, guaranteed temperature measurement's accuracy.

In one possible design, the heat conducting space is a through groove communicating the thermal fuse and the thermistor, and the through groove is of an open structure.

Through setting up this logical groove into open structure, the heat that the panel transmission comes can also be received to this logical inslot to this logical groove has not only realized the effect of heat transfer, can also fully acquire the heat that the panel transmission comes, makes thermistor and the abundant accurate temperature measurement of thermal fuse.

In one possible design, the through slots are filled with a thermally conductive material. The heat conduction material can accelerate the heat conduction process and facilitate the heat transfer.

In one possible design, the mounting bracket is provided with a first mounting groove and a second mounting groove, the thermistor is disposed in the first mounting groove, the thermal fuse is disposed in the second mounting groove, and the through groove communicates the first mounting groove with the second mounting groove.

The thermistor can be accommodated in the first mounting groove, and the fixing and protecting effects on the thermistor are achieved. The second mounting groove can hold the thermal fuse, plays fixed and guard action to the thermal fuse, avoids domestic appliance to receive the collision and change thermal fuse and thermistor's position in transportation or use.

In one possible design, the top end of the mounting bracket is provided with a sinking surface, and the first mounting groove and the second mounting groove are provided on the sinking surface.

Through setting up this face that sinks, can gather together the effect to the temperature production to environmental factor influences such as reduction radiator fan forced air cooling, furnace, room temperature improve the correlation degree of the temperature that thermal fuse and thermistor detected and heat source.

In one possible design, at least a portion of the thermistor is exposed outside the first mounting groove, and at least a portion of the thermal fuse is exposed outside the second mounting groove.

Through exposing thermistor's at least part outside first mounting groove for thermistor can also fully detect thermistor's temperature around fully under the condition of fully contacting the electromagnetism stove panel, thereby has realized that thermistor can be quick accurate detection temperature.

Through exposing at least part of thermal fuse outside the second mounting groove for the thermal fuse can fully detect ambient temperature, thereby fusing that can be accurate timely.

In one possible design, an upper surface of the thermistor is higher than an upper surface of the mounting bracket, and an upper surface of the thermal fuse is lower than the upper surface of the mounting bracket.

The upper surface of the thermistor is higher than that of the mounting bracket, so that the thermistor can be fully contacted with the panel of the induction cooker, and the temperature transmitted by the heat source can be collected in time.

The upper surface of thermal fuse is less than the upper surface of installing support, avoids thermal fuse and electromagnetism stove panel contact, exists a section interval between thermal fuse and the electromagnetism stove panel to it is nearer to avoid thermal fuse and heat source position, and the temperature that the pan transmitted is gathered to thermistor relatively lags behind.

In one possible design, the leads of the thermistor and the leads of the thermal fuse are electrically insulated.

In one possible design, an insulator is provided between the lead pin of the thermistor and the lead pin of the thermal fuse.

The insulating piece can avoid the contact between the pins of the thermistor and the pins of the thermal fuse, and realize electrical insulation.

In a second aspect, an embodiment of the present invention provides an induction cooker, including a bottom shell and a panel disposed on the bottom shell, wherein an overheat temperature protection device as described in the first aspect or various possible designs of the first aspect is disposed in the bottom shell;

wherein the mounting bracket is located below the panel.

The electromagnetism stove that this embodiment provided, this thermistor and thermal fuse set up on the installing support, are provided with the heat conduction space between thermistor and the thermal fuse for can carry out the heat transfer between thermistor and the thermal fuse, thereby make the two can measure same temperature space, guarantee that the two carries out abundant measurement to the temperature, guaranteed temperature measurement's accuracy, make the electromagnetism stove not only can accurate accuse temperature, can also keep safe in utilization.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic diagram of an overheat protection device for an induction cooker provided in the prior art;

fig. 2 is a schematic top view of the overheat protection device provided by the present invention;

fig. 3 is a schematic cross-sectional view of a first overheat protection device provided by the present invention;

fig. 4 is a schematic sectional view of the overheat protection device according to the present invention.

Description of reference numerals:

10-mounting a bracket;

11-a first mounting groove;

12-a second mounting groove;

13-sinking surface;

14-through grooves;

20-a thermistor;

30-a thermal fuse;

40-an insulator;

50-panel.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Fig. 2 is a schematic top view of the overheat protection device provided by the present invention, and fig. 3 is a schematic cross-sectional view of the overheat protection device provided by the present invention. As shown in fig. 2 and 3, the present invention provides an overheat protection device, which includes: a mounting bracket 10, a thermistor 20, and a thermal fuse 30, the thermistor 20 and the thermal fuse 30 being disposed on the mounting bracket 10; a heat conducting space is provided between the thermistor 20 and the thermal fuse 30.

The overheat temperature protection device provided in this embodiment may be applied to various heatable household appliances, such as an induction cooker, an electric fryer, and the like, and the present embodiment does not particularly limit the type of the household appliance. In this embodiment, for convenience of description, an electromagnetic oven is taken as an example for detailed description, and other household appliances are similar, and this embodiment is not described herein again.

The thermistor 20 and the thermal fuse 30 are disposed on the mounting bracket 10, and the mounting bracket 10 may be made of a high temperature resistant material, for example, the mounting bracket 10 may be made of a silicone material.

The thermistor 20 is used for detecting temperature, for example, detecting temperature transmitted from the cooker through the panel of the induction cooker, and when the detected temperature is higher than a preset threshold, the induction cooker generates a protection action to stop heating. The thermistor 20 is a kind of sensitive element, and the thermistor is sensitive to temperature, and shows different resistance values at different temperatures.

This preset threshold is lower than the temperature that the pan passes through the panel transmission when thermal fuse 30 fuses. Therefore, the thermal fuse 30 does not melt when heating is stopped according to the temperature detected by the thermistor 20.

When the thermistor 20 fails, the thermal fuse 30 is fused to prevent temperature runaway, and safety requirements are met. The thermal fuse 30 may also be referred to as a thermal fuse, which is a non-resettable disposable thermal protection device, and the thermal fuse 30 is connected in series to a device line, and when the device does not work normally and the temperature rises to a fusing temperature, the thermal fuse 30 fuses to cut off the circuit. The thermal fuse 30 is generally made of a low melting point alloy type material.

In a specific implementation process, in order to electrically isolate the thermistor 20 and the thermal fuse 30, a gap needs to exist between the thermistor 20 and the thermal fuse 30, and the existence of the gap enables the two to measure temperatures which are not at the same position on one hand, and enables the two not to sufficiently measure the temperatures on the other hand, so that the temperature measurement of the two is not accurate enough due to the reasons and the like.

In this embodiment, a heat conducting space is provided between the thermistor 20 and the thermal fuse 30, and the heat conducting space enables heat transfer between the thermistor 20 and the thermal fuse 30 on the premise of ensuring electrical isolation between the thermistor 20 and the thermal fuse 30, so that the thermistor 20 and the thermal fuse 30 can measure the temperature of the same temperature space as much as possible, and meanwhile, the temperature measured by the thermistor and the temperature measured by the thermal fuse are not limited to one measuring point, but are measured in one measuring space, so that the temperature measured by the thermistor and the temperature measured by the thermal fuse can be sufficiently measured, and the accuracy of temperature measurement is ensured.

The heat conducting space is a space capable of transferring heat, and the heat conducting space may communicate the thermistor 20 and the thermal fuse 30. The heat conducting space may be an open structure or a closed structure, and the structure of the heat conducting space is not particularly limited in this embodiment.

In one possible implementation, the heat conducting space may be a through slot 14 communicating the thermal fuse 30 with the thermistor, the through slot 14 being an open structure. Through setting up this logical groove 14 to open structure, the heat that the panel transmitted can also be received in this logical groove 14 to this logical groove 14 has not only realized the effect of heat transfer, can also fully acquire the heat that the panel transmitted, makes the abundant accurate temperature measurement of thermistor 20 and thermal fuse 30.

Optionally, a heat conductive material is disposed within the through slot 14, which may be, for example, a heat conductive silicone grease. The heat conduction material can accelerate the heat conduction process and facilitate the heat transfer.

Referring to fig. 2 and 3, the mounting bracket 10 is provided with a first mounting groove 11 and a second mounting groove 12, the thermistor 20 is disposed in the first mounting groove 11, the thermal fuse 30 is disposed in the second mounting groove 12, and the through groove 14 communicates the first mounting groove 11 and the second mounting groove 12.

In order to prevent the household appliance from being collided during transportation or use to change the positions of the thermal fuse 30 and the thermistor 20, the first mounting groove 11 provided on the mounting bracket 10 can accommodate the thermistor 20, thereby fixing and protecting the thermistor 20. The second mounting groove 12 provided on the mounting bracket 20 can receive the thermal fuse 30, and plays a role in fixing and protecting the thermal fuse 30.

Wherein, be provided with first pin via hole in the first mounting groove 11, be provided with second pin via hole in the second mounting groove 12, thermistor 20 sets up in this first mounting groove 11, and thermistor 20's pin is worn out from this first pin via hole, and this thermistor 20's pin can connect the controller, and this controller can control the heating. The thermal fuse 30 is disposed in the second mounting groove 12, and a pin of the thermal fuse 30 passes through the second pin via hole, and the pin of the thermal fuse 30 may be connected to a power circuit or a driving circuit, thereby cutting off the heating circuit.

As shown in fig. 3, at least a portion of the thermistor 20 is exposed outside the first mounting groove 11, and at least a portion of the thermal fuse 30 is exposed outside the second mounting groove 12.

By exposing at least part of the thermistor 20 out of the first mounting groove 11, the thermistor 20 can fully detect the temperature around the thermistor 20 under the condition of fully contacting the panel of the induction cooker, so that the thermistor 20 can rapidly and accurately detect the temperature.

By exposing at least a portion of the thermal fuse 30 outside the second mounting groove 12, the thermal fuse 30 can sufficiently detect the external temperature, thereby enabling accurate and timely fusing.

In one possible implementation, at least one third of the thermistors 20 is located within the first mounting groove 11, and the remaining portion is located outside the first mounting groove 11. At least one third of the thermal fuse 30 is located inside the second mounting groove 12 and the remaining portion is located outside the second mounting groove 12. Thus, the thermistor 20 and the thermal fuse 30 can be stably attached, and the temperature can be sufficiently detected.

As shown in fig. 3, a sinking surface 13 is provided at the top end of the mounting bracket 10, and the first mounting groove 11 and the second mounting groove 12 are provided on the sinking surface 13. Through setting up this face 13 that sinks, can produce the effect of gathering together to the temperature to environmental factor influences such as cooling fan air-cooling, furnace, room temperature are reduced, improve the correlation degree of the temperature that thermal fuse 30 and thermistor 20 detected and heat source.

As shown in fig. 2 and 3, in one possible implementation, the first and second mounting

grooves

11 and 12 and the through groove 14 may form an "i" shaped groove body. Alternatively, the surfaces of the first mounting groove 11 and the second mounting groove 12 may be coated with a heat conductive material such as heat conductive silicone grease. Thereby, the heat of the thermal fuse 30 and the thermistor 20 can be well transferred.

In the present embodiment, the thermistor 20 and the thermal fuse 30 may be disposed in parallel, in a "v" shape, or in a "T" shape, and the like, and the present embodiment does not particularly limit the manner of disposing the thermistor 20 and the thermal fuse 30 as long as the leads of the thermistor 20 and the leads of the thermal fuse 30 are electrically insulated.

In addition to the above-described embodiments, in the present embodiment, the upper surface of the thermal fuse 30 is lower than the upper surface of the thermistor 20, so that even though both measure heat in the same temperature space, the heat source transfers the heat to the thermal fuse 30 with a delay with respect to the heat transferred to the thermistor 20, and therefore, for the same heat source at the same time, the temperature corresponding to the heat transferred to the thermal fuse 30 is lower than the temperature detected by the thermistor 20, that is, the thermal fuse 30 delays collecting the temperature transferred by the heat source with respect to the thermistor 20. For example, when the temperature detected by the thermistor 20 is 200 ℃, the heat transferred to the thermal fuse 30 corresponds to a temperature of 180 ℃.

Therefore, since the upper surface of the thermal fuse 30 is lower than the upper surface of the thermistor 20, the thermistor 20 can detect a temperature change first, and when the thermistor 20 detects that the temperature reaches a preset threshold, a protection operation is performed, thereby preventing a malfunction of the thermal fuse 30 due to an excessively high temperature. On the other hand, the rated fusing temperature of the thermal fuse 30 can be lowered.

For example, the protection temperature of the thermistor 20 is 240 ℃, and when the temperature of the heat source is actually required to be 260 ℃ after the thermistor 20 fails, the thermal fuse 30 is fused, and since there is a space between the thermal fuse 30 and the heat source, the thermal fuse 30 having a rated fusing temperature of 240 ℃ may be selected, and the thermal fuse 30 having a rated fusing temperature of 260 ℃ does not need to be selected, so that the requirement for the thermal fuse 30 is reduced.

In a possible implementation manner, the distance between the upper surface of the thermal fuse 30 and the upper surface of the thermistor 20 is between 2 mm and 10 mm, and the specific value of the distance between the upper surface of the thermal fuse 30 and the upper surface of the thermistor 20 may be determined according to the selected rated fusing temperature of the thermal fuse 30 and the actual temperature at which the cut-off circuit is a heat source, and the embodiment is not particularly limited herein.

Further, due to the through groove, not only the heat source but also the heat transferred to the thermistor may be transferred to the thermal fuse. Therefore, although the thermal fuse is spaced from the heat source, the thermal fuse can sufficiently detect the temperature of the heat source, and the safety requirement is met.

The overheat temperature protection device that this embodiment provided, thermal fuse's upper surface is less than thermistor's upper surface, and to same heat source of same time, the temperature that the heat that transmits for thermal fuse corresponds is less than the temperature that thermistor detected to can reduce thermal fuse's rated fusing temperature, reduce the fusing temperature demand to thermal fuse, thereby reduce domestic appliance's cost.

With continued reference to fig. 2 and 3, the upper surface of the thermistor 20 is higher than the upper surface of the mounting bracket 10, and the upper surface of the thermal fuse 30 is lower than the upper surface of the mounting bracket 10.

In the present embodiment, the upper surface of the thermistor 20 is higher than the upper surface of the mounting bracket 10, so that the thermistor 20 can sufficiently contact the panel of the induction cooker, and the temperature transmitted by the heat source can be timely collected.

The upper surface of the thermal fuse 30 is lower than the upper surface of the mounting bracket 10, so that the thermal fuse 30 is prevented from contacting with the panel of the induction cooker, and a distance exists between the thermal fuse 30 and the panel of the induction cooker, so that the thermal fuse 30 is prevented from being close to a heat source, and the temperature transmitted by the cooker can be acquired after lagging relative to the thermistor.

Referring to fig. 3, an insulating member 40 is disposed between the leads of the thermistor 20 and the leads of the thermal fuse 30. The insulating member 40 prevents the lead pin of the thermistor 20 from contacting the lead pin of the thermal fuse 30, thereby achieving electrical insulation.

In the example shown in fig. 3, the thermistor 20 and the thermal fuse 30 are disposed in parallel, and the insulating member 40 may be an insulating strip disposed in the length direction of both, and the length of the insulating strip may be greater than the length of the first mounting groove 11 and the length of the second mounting groove 12, so that the lead pin of the thermistor 20 and the lead pin of the thermal fuse 30 do not contact even if the lead pin of the thermistor 20 and the lead pin of the thermal fuse 30 are bent, deformed, etc.

The utility model also provides an electromagnetism stove, this electromagnetism stove includes the drain pan and sets up the panel on the drain pan. Wherein, can set up coil panel, fan, circuit board and as above-mentioned overheat temperature protection device in this drain pan.

In one possible implementation, the mounting bracket may be disposed in a central location of the coil disc. The position that corresponds to this coil panel on this panel is the zone of heating, and the central point of this zone of heating puts and is located same vertical line with the central point of this coil panel, and when the pan was placed on the panel, the central point of this pan put corresponding to this installing support to guarantee that thermistor and thermal fuse can detect the temperature of the central point of pan, and the temperature of the central point of pan can be higher than the temperature of other positions of pan, thereby thermistor and thermal fuse can play effectual guard action.

Fig. 4 is a schematic cross-sectional view of a second overheat protection device according to the present invention, as shown in fig. 4, the thermistor 20 contacts with the lower surface of the panel 50, and there is a gap between the thermal fuse 30 and the lower surface of the panel 50.

The thermistor 20 is contacted with the lower surface of the panel 50, so that the temperature transmitted by the cookware can be timely acquired; the thermal fuse 30 is spaced from the lower surface of the panel 50, and lags behind the thermistor 20 to collect the temperature transmitted from the pot.

A heat conducting space is arranged between the thermistor 20 and the thermal fuse 30, so that the thermistor 20 and the thermal fuse 30 can measure the same temperature space, and the two can accurately measure the temperature of the cookware.

Under the conditions of normal heating, oil heating or dry cooking of a cooker, the thermistor 20 detects temperature change firstly, and once the temperature detected by the thermistor 20 reaches a preset threshold value, the induction cooker generates protection action to prevent misoperation of the thermal fuse caused by overhigh temperature; under the condition that thermistor 20 became invalid, in case the temperature that the pan transmitted reaches the rated fusing temperature of thermal fuse 30, thermal fuse 30 can in time act, has prevented the out of control of temperature, has satisfied the requirement of ann's rule.

Specifically, the operating circuit of the induction cooker mainly includes a resonant circuit, an Insulated Gate Bipolar Transistor (IGBT) driving circuit, an IGBT, and a micro control unit. During operation, little the control unit can control IGBT drive circuit's work to provide IGBT and switch on starting point and drive voltage, make resonant circuit produce resonant current, thereby resonant circuit's coil panel produces periodic variation's magnetic field, can carry out electromagnetic heating to the pan.

In this embodiment, the pin of the thermistor 20 may be connected to the above-mentioned micro control unit, and the micro control unit can control the operation of the IGBT driving circuit according to the temperature detected by the thermistor, so that the induction cooker stops heating or intermittently heats.

The pin of the thermal fuse 30 can be connected with the above-mentioned IGBT drive circuit, or connected with a drive power supply corresponding to the drive circuit, and when the thermal fuse 30 is fused, the IGBT drive circuit is turned off, and the IGBT does not work any more, so that the induction cooker can not heat any more, and the safety requirements are met.

The electromagnetic oven provided by the embodiment is characterized in that the thermistor and the thermal fuse are arranged on the mounting bracket, the heat conduction space is arranged between the thermistor and the thermal fuse, so that the thermistor and the thermal fuse can conduct heat transfer, the thermistor and the thermal fuse can measure the same temperature space, the temperature can be fully measured by the thermistor and the thermal fuse, the accuracy of temperature measurement is ensured, the temperature of the electromagnetic oven can be accurately controlled, the upper surface of the thermal fuse is lower than the upper surface of the thermistor, the thermistor is in contact with the lower surface of the panel, a distance exists between the thermal fuse and the lower surface of the panel, the thermistor can detect temperature change firstly, the electromagnetic oven can generate protection action, the false operation of the thermal fuse caused by overhigh temperature is prevented, aiming at the same heat source at the same time, the upper surface of the thermal fuse, therefore, the rated fusing temperature of the thermal fuse can be reduced, the fusing temperature requirement on the thermal fuse is reduced, and the cost of the induction cooker is reduced.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and not to limit the same; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. An overtemperature protection device, comprising: a mounting bracket (10), a thermistor (20) and a thermal fuse (30), wherein

The thermistor (20) and the thermal fuse (30) are disposed on the mounting bracket (10);

a heat conducting space is arranged between the thermistor (20) and the thermal fuse (30).

2. The device according to claim 1, wherein the heat conducting space is a through slot (14) communicating the thermal fuse (30) with the thermistor (20), the through slot (14) being of an open configuration.

3. Device according to claim 2, characterized in that said through slots (14) are filled with a heat-conducting material.

4. The apparatus according to claim 2, wherein the mounting bracket (10) is provided with a first mounting groove (11) and a second mounting groove (12), the thermistor (20) is disposed in the first mounting groove (11), the thermal fuse (30) is disposed in the second mounting groove (12), and the through groove (14) communicates the first mounting groove (11) with the second mounting groove (12).

5. The apparatus according to claim 4, wherein the top end of the mounting bracket (10) is provided with a sinking plane (13), and the first mounting groove (11) and the second mounting groove (12) are provided on the sinking plane (13).

6. The apparatus according to claim 5, wherein at least a portion of the thermistor (20) is exposed outside the first mounting groove (11), and at least a portion of the thermal fuse (30) is exposed outside the second mounting groove (12).

7. The device of claim 1, wherein an upper surface of the thermistor (20) is higher than an upper surface of the mounting bracket (10), and an upper surface of the thermal fuse (30) is lower than the upper surface of the mounting bracket (10).

8. The device according to any one of claims 1 to 7, characterized in that the leads of the thermistor (20) and of the thermal fuse (30) are electrically insulated.

9. The device according to claim 8, characterized in that an insulator (40) is provided between the pin of the thermistor (20) and the pin of the thermal fuse (30).

10. An induction hob, characterized in that the induction hob comprises a bottom shell and a panel (50) arranged on the bottom shell, wherein the bottom shell is provided with an overheat temperature protection device according to any one of the claims 1 to 9; wherein the mounting bracket (10) is located below the panel (50).