Heating element, heating assembly and hand warmer

Abstract

The utility model provides a heating element, a heating assembly and a hand warmer, and relates to the technical field of heating modules, the heating element can comprise a temperature measuring module and a heating module, and the temperature measuring module can comprise a thermistor and a resistor pin which are connected with each other; the heating module can comprise a heating sheet and a heating sheet pin which are connected with each other; wherein the resistor pin and the heating sheet pin are mutually independent and are used for respectively connecting a power supply to the thermistor and the heating sheet. According to the heating element, through the resistor pin and the heating sheet pin which are arranged on the power supply system and are mutually independent and do not interfere with each other, the thermistor and the heating sheet are powered by an independent power supply, so that the risks of thermistor failure and temperature out-of-control cannot occur even if the power supply is welded reversely or inserted reversely, and the safety is improved; and the stability of the heating function is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat generating modules, in particular to a heat generating element, a heat generating assembly and a hand warmer. BACKGROUND

[0002] In modern electronic devices and household appliances, heat generating sheets are widely used as core heating components, especially in electric blankets, heated cushions, hand warmers and other daily necessities. In related technologies, in order to improve safety and temperature control accuracy, a temperature sensor such as an NTC (Negative Temperature Coefficient Thermistor) is usually integrated into the heat generating sheet to realize real-time temperature monitoring and feedback control.

[0003] There is a structure design in related technologies as shown in Figure 1 which usually adopts a 3PIN structure. This structure design has the characteristics of simplicity and ease of use, but in actual use, there are potential safety and performance risks. The positive power supply of the 3PIN heat generating sheet is shared, although the NTC and the heat generating sheet have no polarity, but the current flow has a direction, so the temperature will be out of control if the positive power supply is welded or plugged in the wrong way (the heat generating sheet normally generates heat, but the NTC cannot detect the temperature in real time because the NTC has no power supply, resulting in failure), which further causes the temperature control function to be lost, and the device is prone to temperature out of control, which may cause the heat generating sheet to overheat and even cause a safety accident. CONTENT OF THE INVENTION

[0004] The purpose of the present application is to provide a heat generating element, a heat generating assembly and a hand warmer, which can make the thermistor and the heat generating sheet relatively independent in terms of power supply, and they are powered by independent power supplies and independent circuits, so that the risk of thermistor failure and temperature out of control will not occur when the power supply is welded or plugged in the wrong way, improving safety and ensuring the stability of the heat generating function.

[0005] The embodiments of the present application are implemented as follows:

[0006] The present application provides a heat generating element, comprising:

[0007] a temperature measuring module comprising a thermistor and a resistance pin connected to each other;

[0008] a heat generating module comprising a heat generating sheet and a heat generating sheet pin connected to each other;

[0009] wherein the resistance pin and the heat generating sheet pin are independent of each other for connecting power supply to the thermistor and the heat generating sheet respectively.

[0010] In some embodiments of the present application, the resistance pin includes a resistance positive pin and a resistance negative pin, and the resistance positive pin and the resistance negative pin are electrically connected to the thermistor, respectively.

[0011] In some embodiments of the present application, the heating sheet pin includes a heating sheet positive pin and a heating sheet negative pin, and the heating sheet positive pin and the heating sheet negative pin are electrically connected to the heating sheet, respectively.

[0012] In some embodiments of the present application, the resistance positive pin, the resistance negative pin, the heating sheet positive pin and the heating sheet negative pin are arranged on the same side of the same surface.

[0013] In some embodiments of the present application, the heating element further includes at least two layers of insulating films, and the heating sheet is arranged between the two layers of insulating films, and the thermistor is arranged on a side of the insulating film away from the heating sheet, for detecting the temperature of the heating sheet.

[0014] In some embodiments of the present application, the insulating film includes a polyimide film.

[0015] In some embodiments of the present application, the number of the insulating films is two, and the thickness of the two layers of insulating films is greater than the thickness of the heating sheet.

[0016] In some embodiments of the present application, the heating sheet includes a red copper heating sheet.

[0017] The embodiments of the present application further provide a heating assembly, comprising:

[0018] The heating element as described in the foregoing embodiments;

[0019] The plug connector includes an outer housing and a plurality of terminals, and the plurality of terminals are embedded in the outer housing, and the plurality of terminals are electrically connected to the resistance pin and the heating sheet pin, respectively.

[0020] The embodiments of the present application further provide a hand warmer, comprising the heating element as described in the foregoing embodiments, and / or the heating assembly as described in the foregoing embodiments.

[0021] The heating element, the heating assembly and the hand warmer provided by the embodiments of the present application are independent of each other and do not interfere with each other by being arranged on the power supply system, so that the thermistor and the heating sheet are powered by independent power supplies, and even if the power supply is welded or plugged in reverse, the risk of thermistor failure and temperature out of control does not occur, the safety is improved, and the stability of the heating function is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 Structure diagram of a heating element provided by the related art;

[0024] Figure 2 Structure diagram of a heating element provided by an embodiment of the present application.

[0025] Figure 3 Front view of a heating element provided by an embodiment of the present application.

[0026] Figure 4 Structure diagram of a heating assembly provided by an embodiment of the present application. Figure 3 Cross-sectional view of A-A position in FIG. 10.

[0027] Figure 5 Structure diagram of a heating assembly provided by an embodiment of the present application.

[0028] Legend: 100-heating element; 110-thermistor; 1111-resistance positive electrode pin; 1112-resistance negative electrode pin; 120-heating sheet; 1211-heating sheet positive electrode pin; 1212-heating sheet negative electrode pin; 130-insulating film; 200-heating assembly; 210-plug connector. DETAILED DESCRIPTION

[0029] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will combine the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0031] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0032] In the description of the embodiments of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0033] In addition, if the terms "horizontal", "vertical", "overhanging" and the like are used, they do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0034] In the description of the embodiments of the present application, "a plurality of" represents at least 2.

[0035] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, if the terms "set", "install", "connect", "connect" are used, they should be understood in a broad sense, for example, they can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] The hand warmer provided by the embodiments of the present application can include a heating element, a hand warmer frame and a hand warmer surface. The hand warmer frame is connected with the heating element, and the hand warmer surface is covered on the hand warmer frame. The hand warmer frame supports the hand warmer surface, and the angle of the heating element can be adjusted. In actual application, the orientation of the hand warmer surface can be adjusted by the angle of the heating element. The heating element will be described in detail below.

[0037] Figure 1The schematic diagram of the structure of the heating element provided for the related technology shows that the heating element adopts a 3PIN structure. This structural design is simple and easy to use, but in actual use, there are potential safety and performance risks. Specifically, in the 3PIN heating element structure, the positive power supply is shared. Although the NTC and the heating element have no polarity, the current flow is directional. Therefore, if the positive pole of the power supply is welded or plugged in the wrong way, the temperature will be out of control, and the temperature control function will be lost. The equipment is prone to the risk of temperature runaway. In severe cases, it may cause the heating element to overheat and even cause a safety accident.

[0038] Figure 2 This is a structural diagram of a heating element 100 provided in one embodiment of the present application. Figure 3 This is a front view of a heating element 100 provided in one embodiment of the present application. Figure 4 for Figure 3 Cross-sectional view at position AA. Figure 5 This is a schematic diagram of the structure of the heating component 200 provided in one embodiment of the present application. Figures 2-4 As shown, the heating element 100 may include a temperature measuring module and a heating module. The temperature measuring module may include a thermistor 110 and resistor pins connected to each other; the heating module may include a heating plate 120 and heating plate pins connected to each other; wherein the aforementioned resistor pins and the aforementioned heating plate pins are independent of each other, so as to be used to respectively connect the thermistor 110 and the aforementioned heating plate 120 to a power source.

[0039] It is worth noting that the heating element 100 is provided with independent and non-interfering resistor pins and heating plate pins on the power supply system, so that the thermistor 110 and the heating plate 120 are both powered by independent power supplies. Therefore, even if the power supply is welded or plugged in reverse, there will be no risk of failure of the thermistor 110 and temperature out of control, thereby improving safety and ensuring the stability of the heating function.

[0040] In an optional embodiment, the heating plate 120 may include a copper heating plate 120, a ceramic heating plate 120, and the like. Specifically, in this embodiment, the heating plate 120 may preferably be a copper heating plate 120. Copper has extremely high electrical conductivity and thermal conductivity, and can quickly convert electrical energy into thermal energy to achieve efficient heating. Compared to other metal materials, copper can heat and evenly distribute heat in a relatively short period of time, thereby improving heating efficiency. Depending on the specific implementation environment, other types of heating plates 120 may also be used.

[0041] In an optional embodiment, the temperature measurement module functions as a temperature sensor, wherein the thermistor 110 may include an NTC, PTC, etc. As the core component of the temperature measurement module, the thermistor 110 can accurately sense temperature changes around the heating element 120 and transmit the data to the control system to achieve the ultimate temperature control effect.

[0042] Please refer to Figure 2 , the resistance pins include a resistance positive pin 1111 and a resistance negative pin 1112, the resistance positive pin 1111 and the resistance negative pin 1112 are electrically connected to the thermistor 110 respectively. The heating sheet pins include a heating sheet positive pin 1211 and a heating sheet negative pin 1212, the heating sheet positive pin 1211 and the heating sheet negative pin 1212 are electrically connected to the heating sheet 120 respectively.

[0043] It should be understood that the resistance positive pin 1111, the resistance negative pin 1112, the heating sheet positive pin 1211 and the heating sheet negative pin 1212 in the figure can also be exchanged in sequence, for example, from top to bottom (the direction from top to bottom) to change to the heating sheet positive pin 1211, the heating sheet negative pin 1212, the resistance positive pin 1111 and the resistance negative pin 1112 respectively. As long as it has the effect of being independent of each other, the embodiment does not constitute a limitation on the specific arrangement position. Figure 2

[0044] In the embodiment, the resistance positive pin 1111, the resistance negative pin 1112, the heating sheet positive pin 1211 and the heating sheet negative pin 1212 can be arranged at the same side direction of the same surface.

[0045] It should be understood that arranging these pins on the same side can simplify the electrical connection and welding process. The structure design can reduce the wiring complexity, thereby improving the assembly efficiency and reducing the manufacturing cost. At the same time, all the pins are concentrated on the same side, which is convenient for direct connection, reducing the need for complex multi-directional wiring and space layout. In addition, when all the pins are located on the same side, higher consistency can be ensured during welding or contact. Because the pin direction is consistent, it can be easier to ensure the correct connection between the contact points during welding, reducing the occurrence of electrical faults such as poor contact, short circuit or open circuit.

[0046] Please refer to Figure 3 and Figure 4 , the heating element 100 further includes at least two layers of insulating films 130, the heating sheet 120 is arranged between the two layers of insulating films 130, and the thermistor 110 is arranged on the side of the insulating film 130 away from the heating sheet 120, for detecting the temperature of the heating sheet 120.

[0047] ​It should be understood that the use of the insulating film 130 can effectively isolate the heating sheet 120 from the thermistor 110, avoiding safety problems caused by current leakage, short circuit or electric shock and the like. The insulating film 130 provides the necessary electrical isolation, ensuring the safe operation of the heating element 100 in a high temperature or high voltage environment, preventing direct contact or electrical interference between electrical elements. At the same time, the thermistor 110 is placed on the side of the insulating film 130 away from the heating sheet 120, so that it can more effectively monitor the temperature of the heating sheet 120. The position of the thermistor 110 is close to the external surface of the heating sheet 120, which can accurately detect the temperature change of the heating element 100, thereby achieving accurate temperature control.

[0048] In an optional embodiment, the aforementioned insulating film 130 comprises a polyimide film (PI). It can be understood that the PI film has excellent electrical insulation performance, with high dielectric strength and stable electrical insulation performance in high temperature and high humidity environments. The PI film in this embodiment can be used in the temperature range of -40 degrees to 200 degrees, which can cover the temperature range of the hand warmer during normal operation, thereby facilitating the stability during use.

[0049] It can also be understood that in optional other embodiments, the insulating film 130 can also use other high-temperature-resistant insulating films 130, such as polyethylene terephthalate (PET) and the like, and this embodiment does not constitute a limitation on the specific type thereof.

[0050] In an optional embodiment, the number of insulating films 130 can be 2, 3, etc., as long as the heating sheet 120 is arranged between two insulating films 130. This embodiment does not constitute a limitation on the specific number of insulating films 130, but only exemplifies the number thereof.

[0051] Please refer again to Figure 4 , in an embodiment of this embodiment, the number of the aforementioned insulating film 130 is two, and the thickness of the two aforementioned insulating films 130 is greater than the thickness of the aforementioned heating sheet 120. Specifically, by using two insulating films 130 with large thickness, the electrical contact between the heating sheet 120 and other electrical elements or the external environment can be more effectively isolated, reducing the risk of electrical failure (such as short circuit or leakage), and ensuring the stable operation of the hand warmer in a high temperature environment.

[0052] Specifically, the thickness of the insulating film 130 in the embodiment can be 0.03 mm, and the thickness of the heating body can be 0.018 mm. It can be understood that under the thickness of 0.03 mm of the insulating film 130, a good insulation effect can be achieved, and the heating body and the thermistor 110 can be effectively isolated. At the same time, the thickness setting can also ensure the good heat transfer function of the heating sheet 120, and avoid the phenomenon of poor heating effect.

[0053] As shown in Figure 5 The embodiment of the present application also provides a heating assembly 200, which comprises the heating element 100 and the plug connector 210. The plug connector 210 comprises a shell (not shown in the figure) and a plurality of terminals (not shown in the figure). The plurality of terminals are embedded in the shell, and the plurality of terminals are electrically connected to the resistance pins and the heating sheet pins respectively.

[0054] In an optional embodiment, the shell can be a 4P plastic shell, which refers to a plastic shell with four connection pins (pins) for accommodating the terminals and providing plug-in, fixing and protection functions.

[0055] In actual application, the shell can be made of high-temperature-resistant and highly insulating plastic, such as nylon, ABS, etc., to fix the terminals. The terminals can be used to connect external power supply to ensure the power supply to the heating sheet 120. The combination of the two provides a reliable and durable connection mode for the heating assembly 200, and simplifies the assembly and maintenance process.

[0056] The embodiment of the present application also provides a hand warmer, which comprises the heating element 100 and / or the heating assembly 200, and has all the beneficial effects thereof.

[0057] The above is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application is included in the protection scope of the present application.

Claims

1. A heat generating element, characterized by, The heating element comprises: a temperature measuring module comprising a thermistor and a resistance pin connected to each other; a heating module comprising a heating sheet and a heating sheet pin connected to each other; wherein the resistance pin and the heating sheet pin are independent of each other, and are used for connecting power supply to the thermistor and the heating sheet respectively.

2. A heat generating element according to claim 1, characterised in that The resistance pin comprises a resistance positive pin and a resistance negative pin, and the resistance positive pin and the resistance negative pin are electrically connected to the thermistor respectively.

3. A heat generating element according to claim 2, characterised in that The heating sheet pin comprises a heating sheet positive pin and a heating sheet negative pin, and the heating sheet positive pin and the heating sheet negative pin are electrically connected to the heating sheet respectively.

4. A heat generating element according to claim 3, characterised in that The resistance positive pin, the resistance negative pin, the heating sheet positive pin and the heating sheet negative pin are arranged on the same side of the same surface.

5. The heat-generating element according to claim 1, characterized in that The heating element further comprises at least two layers of insulating films, the heating sheet is arranged between the two layers of the insulating films, and the thermistor is arranged on the side of the insulating film away from the heating sheet, so as to detect the temperature of the heating sheet.

6. A heat generating element according to claim 5, characterised in that The insulating film comprises a polyimide film.

7. The heat-generating element according to claim 5, characterized in that The number of the insulating films is two, and the thickness of the two layers of the insulating films is greater than the thickness of the heating sheet.

8. The heat-generating element according to claim 1, characterized in that The heating sheet comprises a red copper heating sheet.

9. A heat generating component, characterized by The heating element comprises: The heating element according to any one of claims 1 to 8; The plug connector comprises a shell and a plurality of terminals, the plurality of terminals are embedded in the shell, and the plurality of terminals are electrically connected to the resistance pin and the heating sheet pin respectively.

10. A hand warmer, characterized by, The heating element according to any one of claims 1 to 8 and / or the heating assembly according to claim 9.

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