Anti-scald reminding system and electric heater applying same

Abstract

The utility model relates to an anti-scald reminding system and an electric heater using the anti-scald reminding system. The anti-scald reminding system comprises a reminding module; the thermoelectric generator comprises a hot end, a cold end and a thermoelectric power generation unit, the hot end is used for being in contact with a heating source, and the thermoelectric power generation unit is used for generating electromotive force according to the temperature difference between the hot end and the cold end; the controller is electrically connected with the thermoelectric generator and the reminding module and is configured to correspondingly control the reminding module to carry out anti-scald reminding or not according to the electromotive force generated by the thermoelectric generator; and the energy storage module is electrically connected with the output end of the thermoelectric generator and the controller, and is used for storing the electromotive force generated by the thermoelectric generator so as to supply power to the controller. The anti-scald reminding system can directly utilize the electric energy stored by the energy storage module to work, and indirectly utilize the electromotive force generated by the thermoelectric generator to obtain the temperature condition of the heating source, so that an external power supply and a temperature sensor are not needed.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-scalding, in particular to an anti-scalding reminder system and an electric heater with the anti-scalding reminder system. Background Art

[0002] Many household products in the prior art generate a large amount of heat during use, for example, household appliances such as gas stoves, electric heaters, and electric furnaces. These household appliances generate a large amount of heat during use, causing the temperature to slowly rise, and users cannot obtain the temperature of the household appliances well. Therefore, if they are accidentally touched during or after use of the above-mentioned household appliances, burns may easily occur.

[0003] In order to prevent users from getting scalded, there are many anti-scalding methods in the prior art. For example, the Chinese utility model with patent number ZL201920028837.5 (authorization announcement number CN210035594U) discloses a gas stove with an anti-scalding reminder function. The patent uses a temperature sensor to detect the temperature. When the temperature of the temperature sensor exceeds the preset temperature, an anti-scalding reminder is given by changing the color of the LED. However, since this method requires power to be supplied to the temperature sensor, the anti-scalding reminder will not work if the power is cut off, so the risk of users getting scalded still exists.

[0004] In order to solve the power supply problem during the above anti-scalding reminder, there is another Chinese utility model patent with patent number ZL202121691144.8 (authorization announcement number CN216010934U) that discloses an electric furnace with an anti-scalding reminder function. The electric furnace includes a base and a panel. The panel is arranged on the top of the base. A heating element is arranged in the base. A heating area and a thermochromic coating are arranged on the panel. The heating element is located below the heating area. The thermochromic coating is located around the heating area. The thermochromic coating will change color when the panel temperature is high, thereby reminding the user to prevent the user from being scalded by the high-temperature panel. Although the electric furnace uses the change of temperature to change the color of the thermochromic coating to provide an anti-scalding reminder, the thermochromic coating is prone to falling off after the electric furnace is used for a long time. However, it is not easy for the user to distinguish whether the thermochromic coating has not changed color due to the coating falling off, or the thermochromic coating has not changed color due to the temperature not being reached, so the risk of the user being scalded still exists. For this reason, it is necessary to further improve the existing technology. Utility Model Content

[0005] The first technical problem to be solved by the present invention is to provide an anti-scalding reminder system which does not require an external power supply and has a better anti-scalding effect in view of the above-mentioned prior art.

[0006] The second technical problem to be solved by the present invention is to provide an electric heater with the above-mentioned anti-scalding reminder system in view of the above-mentioned prior art.

[0007] The technical solution adopted by the utility model to solve the above-mentioned first technical problem is: an anti-scalding reminder system, comprising:

[0008] Reminder module;

[0009] The invention is characterized in that it also includes:

[0010] A thermoelectric generator, comprising a hot end, a cold end and a thermoelectric power generation unit disposed between the hot end and the cold end, wherein the hot end is used to contact a heat source, and the thermoelectric power generation unit is used to generate an electromotive force according to the temperature difference between the hot end and the cold end;

[0011] The controller is electrically connected to the temperature difference generator and the reminder module, and is configured to: control the reminder module to perform an anti-scalding reminder according to the magnitude of the electromotive force generated by the temperature difference generator;

[0012] The energy storage module is electrically connected to the output end of the thermoelectric generator and the controller, and is used to store the electromotive force generated by the thermoelectric generator to supply power to the controller.

[0013] Preferably, the thermoelectric power generation unit includes at least one semiconductor thermoelectric power generation element connected in series, one end of each semiconductor thermoelectric power generation element is electrically connected to the hot end of the thermoelectric generator through a first heat conductor, and the other end of each semiconductor thermoelectric power generation element is electrically connected to the cold end of the thermoelectric generator through a second heat conductor.

[0014] In this solution, each semiconductor thermoelectric power generation element is composed of a P-type semiconductor thermoelectric element and an N-type semiconductor thermoelectric element connected in series.

[0015] In order to realize power supply of the controller, the energy storage module includes a rechargeable battery and a charging circuit, the input end of the charging circuit is electrically connected to the output end of the thermoelectric generator, the output end of the charging circuit is electrically connected to the rechargeable battery, and the rechargeable battery is electrically connected to the controller.

[0016] In order to make the charging process of the rechargeable battery more stable, a voltage stabilizing circuit is provided between the output end of the temperature difference generator and the input end of the charging circuit.

[0017] Preferably, the reminder module is at least one of an indicator light, an alarm, and a display.

[0018] In order to further reduce the risk of scalding of users, the controller is also electrically connected to a heat dissipation module.

[0019] The technical solution adopted by the utility model to solve the second technical problem is: an electric heater, including a panel and a heat source embedded in the panel, characterized in that: the panel also has the above-mentioned anti-scalding reminder system.

[0020] In order to improve the energy storage efficiency, there is at least one thermoelectric generator, which is arranged adjacent to the heat source.

[0021] Preferably, the electric heater is an induction cooker.

[0022] Compared with the prior art, the advantages of the present invention are: on the one hand, the thermoelectric generator is used to generate electricity, and the energy storage module is electrically connected to the output end of the thermoelectric generator and the controller, so that the energy storage module stores the electromotive force generated by the thermoelectric generator to power the controller; on the other hand, the controller is electrically connected to the thermoelectric generator and the reminder module, and the controller can control the reminder module to perform anti-scalding reminders according to the electromotive force generated by the thermoelectric generator. Therefore, the anti-scalding reminder system can directly use the electric energy stored in the energy storage module to work without an external power supply, and indirectly use the electromotive force generated by the thermoelectric generator to obtain the temperature of the heat source, so there is no need to use a temperature sensor to detect the temperature, and the thermoelectric generator plays a dual role, reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a functional block diagram of the anti-scalding reminder system in the embodiment of the utility model;

[0024] Figure 2 Schematic diagram of a temperature difference generator in an embodiment of the present utility model. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] like Figure 1 As shown, the anti-scalding reminder system in this embodiment includes a reminder module 1 , a temperature difference generator 2 , a controller 4 and an energy storage module 5 .

[0027] like Figure 2As shown, the thermoelectric generator 2 includes a hot end 21, a cold end 22 and a thermoelectric power generation unit arranged between the hot end 21 and the cold end 22, the hot end 21 is used to contact a heat source (not shown in the figure), and the thermoelectric power generation unit is used to generate an electromotive force according to the temperature difference between the hot end 21 and the cold end 22; in this embodiment, the thermoelectric power generation unit includes at least one semiconductor thermoelectric power generation element 23 connected in series, each semiconductor thermoelectric power generation element 23 is composed of a P-type semiconductor thermoelectric element 231 and an N-type semiconductor thermoelectric element 232 connected in series, one end of each semiconductor thermoelectric power generation element 23 is electrically connected to the hot end 21 of the thermoelectric generator 2 through a first heat conductor 24, and the other end of each semiconductor thermoelectric power generation element 23 is electrically connected to the cold end 22 of the thermoelectric generator 2 through a second heat conductor 25. The first heat conductor 24 and the second heat conductor 25 are both alumina ceramic substrates. When the hot end temperature is greater than the cold end temperature, the carriers move from the hot end to the cold end and accumulate at the cold end to form a potential difference. At the same time, the semiconductor thermoelectric element 23 generates a reverse charge flow under the action of the potential difference. When the charge flow and the internal electric field reach a dynamic equilibrium, a thermoelectric electromotive force will be formed at both ends of the semiconductor thermoelectric element 23. At this time, the thermoelectric generator 2 starts to generate electricity. This power generation technology is a prior art and will not be elaborated here.

[0028] The controller 4 is electrically connected to the temperature difference generator 2 and the reminder module 1, and is configured to control the reminder module 1 to perform anti-scalding reminders according to the magnitude of the electromotive force generated by the temperature difference generator 2. The reminder module 1 is at least one of an indicator light, an alarm, and a display. The indicator light in this embodiment can be a red or green indicator light. The red light is used for anti-scalding reminders, indicating that the temperature of the heat source is too high; the green light indicates that the current temperature of the heat source is safe and can be touched with confidence; the alarm is a buzzer, which sounds an alarm when the temperature of the heat source is too high; the display is used to display a text reminder that the current temperature is too high; the reminder module 1 can have one of the above indication, alarm or display reminder functions, or it can have the above two reminder functions (for example: sound and light alarm), or even the above three reminder functions.

[0029] The principle of the above anti-scalding reminder is: due to the proportional relationship between the electromotive force E and the temperature difference, specifically:

[0030] E=α(t1-t2)

[0031] Wherein, t1 is the temperature of the hot end 21 of the thermoelectric generator 2, t2 is the temperature of the cold end 22 of the thermoelectric generator 2, and α is the thermocouple value corresponding to the semiconductor thermoelectric element 23, which is a fixed value;

[0032] That is, through the calculation formula of the above electromotive force E, it can be clearly known that when the electromotive force E≥the preset electromotive force β, it means that the temperature of the heat source is too high and an anti-scalding reminder is needed; when the electromotive force E<β, it means that the panel temperature is lower than the human body temperature tolerance value and no anti-scalding reminder is needed.

[0033] The energy storage module 5 is electrically connected to the output end of the thermoelectric generator 2 and the controller 4, and is used to store the electromotive force generated by the thermoelectric generator 2 to power the controller 4. In this embodiment, the energy storage module 5 includes a rechargeable battery 51 and a charging circuit 52, the input end of the charging circuit 52 is electrically connected to the output end of the thermoelectric generator 2, the output end of the charging circuit 52 is electrically connected to the rechargeable battery 51, and the rechargeable battery 51 is electrically connected to the controller 4. In addition, a voltage stabilizing circuit 53 is provided between the output end of the thermoelectric generator 2 and the input end of the charging circuit 52. The above-mentioned charging circuit 52 and voltage stabilizing circuit 53 are prior art, such as the contents disclosed in the utility model patent with patent number ZL202222506794.1 "Charging circuit for multi-specification battery packs", which will not be displayed and repeated here.

[0034] In addition, the controller 4 is also electrically connected to a heat dissipation module 6. The heat dissipation module 6 can be a small fan, which accelerates heat dissipation when the temperature of the heat source is too high. Of course, the heat dissipation module 6 works best when the heat source is not working, so as not to affect the work of the heat source.

[0035] This embodiment also involves an electric heater including a panel (not shown in the figure) and a heat source (not shown in the figure) embedded in the panel, and the panel also has the above-mentioned anti-scalding reminder system. There is at least one thermoelectric generator 2, which is arranged adjacent to the heat source. The electric heater in this embodiment is an induction cooker, the heat source is a heating coil, and all thermoelectric generators are installed below the heating coil.

[0036] Of course, the above-mentioned anti-scalding reminder system can also be applied to other electric heaters, including but not limited to cooking equipment such as steamers, ovens, electric kettles, rice cookers, etc., or combined appliances integrating at least one of the above-mentioned.

Claims

1. A scalding prevention reminder system, comprising: Reminder module (1); The invention is characterized in that it also includes: A thermoelectric generator (2) comprises a hot end (21), a cold end (22) and a thermoelectric power generation unit arranged between the hot end (21) and the cold end (22), wherein the hot end (21) is used to contact a heat source, and the thermoelectric power generation unit is used to generate an electromotive force according to the temperature difference between the hot end (21) and the cold end (22); The controller (4) is electrically connected to the temperature difference generator (2) and the reminder module (1), and is configured to control the reminder module (1) to issue an anti-scalding reminder according to the magnitude of the electromotive force generated by the temperature difference generator (2); The energy storage module (5) is electrically connected to the output end of the thermoelectric generator (2) and the controller (4) and is used to store the electromotive force generated by the thermoelectric generator (2) to supply power to the controller (4).

2. The anti-scalding reminder system according to claim 1, characterized in that: The temperature difference power generation unit comprises at least one semiconductor temperature difference power generation element (23) connected in series, one end of each semiconductor temperature difference power generation element (23) is electrically connected to the hot end (21) of the temperature difference generator (2) via a first heat conductor (24), and the other end of each semiconductor temperature difference power generation element (23) is electrically connected to the cold end (22) of the temperature difference generator (2) via a second heat conductor (25).

3. The anti-scalding reminder system according to claim 2, characterized in that: Each semiconductor temperature difference power generation element (23) is composed of a P-type semiconductor thermoelectric element (231) and an N-type semiconductor thermoelectric element (232) connected in series.

4. The anti-scalding reminder system according to claim 1, characterized in that: The energy storage module (5) comprises a rechargeable battery (51) and a charging circuit (52); the input end of the charging circuit (52) is electrically connected to the output end of the temperature difference generator (2); the output end of the charging circuit (52) is electrically connected to the rechargeable battery (51); and the rechargeable battery (51) is electrically connected to the controller (4).

5. The anti-scalding reminder system according to claim 4, characterized in that: A voltage stabilizing circuit (53) is also provided between the output end of the temperature difference generator (2) and the input end of the charging circuit (52).

6. The anti-scalding reminder system according to any one of claims 1 to 5, characterized in that: The reminder module (1) is at least one of an indicator light, an alarm, and a display.

7. The anti-scalding reminder system according to claim 6, characterized in that: The controller (4) is also electrically connected to a heat dissipation module (6).

8. An electric heater, comprising a panel and a heat source embedded in the panel, characterized in that: The panel also has an anti-scalding reminder system as described in any one of claims 1 to 7.

9. The electric heater according to claim 8, characterized in that: There is at least one thermoelectric generator, which is arranged adjacent to the heat source.

10. The electric heater according to claim 9, characterized in that: The electric heater is an electromagnetic cooker.

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