Heating module

Abstract

The utility model relates to the technical field of heaters, and provides a heating module which comprises a heating assembly, the heating assembly comprises a heating sheet, the heating sheet comprises a first electrode sheet and a second electrode sheet, at least one PTC ceramic sheet is arranged between the first electrode sheet and the second electrode sheet, and the PTC ceramic sheet is arranged between the first electrode sheet and the second electrode sheet. At least one common ceramic plate is arranged between the first electrode plate and the second electrode plate, conductive adhesives are arranged between the common ceramic plate and the first electrode plate and between the PTC ceramic plate and the first electrode plate, and conductive adhesives are arranged between the common ceramic plate and the second electrode plate and between the PTC ceramic plate and the second electrode plate. The PTC ceramic plate and the common ceramic plate are arranged between the first electrode plate and the second electrode plate, the common ceramic plate does not have the self-temperature-limiting characteristic but can serve as a heat conduction medium, heat generated by the PTC ceramic plate can be evenly distributed to the whole heating area, more even heat distribution is provided, and formation of local hot spots is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of heater, especially relates to a heating module. BACKGROUND

[0002] Positive temperature coefficient (PTC) ceramic heating module has been widely used in household appliances, automobiles, industries and other fields due to its self-limiting temperature characteristics, high efficiency, energy saving and safety and reliability. The traditional PTC heating module is usually composed of ceramic materials with positive temperature coefficient characteristics. The resistance of this material increases significantly when the temperature rises, thereby automatically adjusting the current passing through to prevent overheating.

[0003] Although the existing PTC heating module has good self-regulating temperature and safety, it still has the problem of uneven heat distribution in actual application, especially in large-area heating or precise temperature control application scenarios.

[0004] The utility model discloses a heating module, which can solve the problem of uneven heat distribution of traditional PTC ceramic sheets. UTILITY MODEL CONTENTS

[0005] The utility model discloses a heating module, which can solve the problem of uneven heat distribution of traditional PTC ceramic sheets.

[0006] A heating module, comprising a heating assembly, the heating assembly comprising a heating sheet, the heating sheet comprising a first electrode sheet, a second electrode sheet, at least one PTC ceramic sheet being arranged between the first electrode sheet and the second electrode sheet, and at least one ordinary ceramic sheet being arranged between the first electrode sheet and the second electrode sheet.

[0007] The ordinary ceramic sheet and the PTC ceramic sheet are arranged between the first electrode sheet and the second electrode sheet.

[0008] The width of the ordinary ceramic sheet and the PTC ceramic sheet is consistent with the width of the second electrode sheet, and the width of the ordinary ceramic sheet and the PTC ceramic sheet is consistent with the width of the first electrode sheet.

[0009] The first electrode sheet is provided with a first electrode on one side, and the second electrode sheet is provided with a second electrode on one side.

[0010] The heating sheet is provided with an insulating sleeve.

[0011] The heating assembly is provided with a shell.

[0012] A heating module as described above, wherein the common ceramic sheet is disposed between two of the PTC ceramic sheets.

[0013] A heating module as described above, wherein the insulating sleeve is made of one or a combination of polyimide, plastic, and silicone.

[0014] A heating module as described above, wherein the housing is made of aluminum alloy.

[0015] A heating module as described above, wherein the housing has rounded corners on both sides.

[0016] The embodiments of the present application have the following beneficial effects:

[0017] 1. In the present application, PTC ceramic sheets and common ceramic sheets are arranged between the first electrode sheet and the second electrode sheet. The common ceramic sheets, although not having the self-limiting temperature characteristic, can act as a heat conduction medium to help distribute the heat generated by the PTC ceramic sheets evenly throughout the heating area, providing more uniform heat distribution and reducing the formation of local hot spots.

[0018] 2. In the present application, the conductive adhesive ensures good electrical contact between the electrode sheets and the ceramic sheets, reducing contact resistance and improving the efficiency and stability of current flow. The tight electrical connection helps to distribute the current evenly and avoid local overheating. The conductive adhesive not only has the function of conducting electricity, but also has a certain heat conduction capacity, which can help the heat to be transferred from the ceramic sheets to the electrode sheets and then dissipated through the electrode sheets.

[0019] In summary, the present application solves the problem of uneven heat distribution of traditional PTC ceramic sheets. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0021] Fig. 1 is an exploded view of a heating module of the present application.

[0022] Fig. 2 is a schematic view of the overall structure of a heating module of the present application.

[0023] Fig. 3 is a schematic view of the structure of a heating assembly of a heating module of the present application.

[0024] Fig. 4 is a structural schematic view of a heating sheet of a heating module. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] As shown in Figs. 1 to 4 The present application provides a heating module, which includes a heating assembly 2. The heating assembly 2 includes a heating sheet 21, which comprises a first electrode sheet 211 and a second electrode sheet 215. At least one PTC ceramic sheet 214 is arranged between the first electrode sheet 211 and the second electrode sheet 215. At least one ordinary ceramic sheet 213 is arranged between the first electrode sheet 211 and the second electrode sheet 215. When an external power source is connected to the first electrode sheet 211 and the second electrode sheet 215, an electric current enters the heating sheet 21 through these electrode sheets. The electric current flows through the PTC ceramic sheet 214. Due to the characteristics of PTC material, as the temperature rises, its resistance value will increase significantly, thereby limiting the passing current and preventing overheating. The PTC ceramic sheet 214 starts to heat up after being powered on, and the heat is transferred to the adjacent ordinary ceramic sheet 213 through heat conduction. Although the ordinary ceramic sheet 213 does not have the self-limiting temperature characteristic, it can act as a heat conduction medium to help evenly distribute the heat generated by the PTC ceramic sheet 214 to the entire heating area. By reasonably designing the position and number of ordinary ceramic sheets 213, the temperature uniformity of the entire heating surface can be effectively improved, and the formation of local hot spots can be reduced. Through this combined design, the heating module not only can provide more uniform heat distribution, but also can reduce the cost to a certain extent, because the ordinary ceramic sheet is usually lower in cost than the PTC ceramic sheet.

[0027] Further, as a preferred embodiment of the present application but not limited, the common ceramic sheet 213 and the PTC ceramic sheet 214 are provided with conductive glue between the common ceramic sheet 213 and the PTC ceramic sheet 214 and the first electrode sheet 211 and the second electrode sheet 215. The conductive glue can ensure good electrical contact between the electrode sheet and the ceramic sheet, reduce the contact resistance, thereby improving the efficiency and stability of the current passing through, and the close electrical connection helps to evenly distribute the current and avoid the occurrence of local overheating. The conductive glue not only has the function of conducting electricity, but also has a certain heat conduction capacity, which can help the heat to be transferred from the ceramic sheet to the electrode sheet and then dissipated through the electrode sheet. In this way, the heat distribution of the entire heating module can be further improved, and the heating can be more uniform. The conductive glue can also provide additional mechanical bonding force to enhance the structural stability of the entire heating assembly and prevent loosening or falling off due to vibration or impact.

[0028] Optionally, in some embodiments, the conductive glue is one of silver-based conductive glue, nickel-based conductive glue, and carbon-based conductive glue.

[0029] Further, as a preferred embodiment of the present application but not limited, the width of the common ceramic sheet 213 and the PTC ceramic sheet 214 is consistent with the width of the second electrode sheet 215, and the width of the common ceramic sheet 213 and the PTC ceramic sheet 214 is consistent with the width of the first electrode sheet 211. The width of the common ceramic sheet 213 and the PTC ceramic sheet 214 is consistent with the width of the electrode sheet, thereby ensuring that the contact area between the electrode sheet and the ceramic sheet is maximized, thereby reducing the contact resistance and improving the efficiency of the current passing through, and the heat can be more evenly transferred from the ceramic sheet to the electrode sheet and then dissipated through the electrode sheet, avoiding the occurrence of local overheating.

[0030] Further, as a preferred embodiment of the present application but not limited, the first electrode sheet 211 is provided with a first electrode 212 on one side, and the second electrode sheet 215 is provided with a second electrode 216 on one side. The first electrode 212 is arranged on one side of the first electrode sheet 211 and used to be connected with one terminal of an external power source, and the second electrode 216 is arranged on one side of the second electrode sheet 215 and used to be connected with another terminal of the external power source. Through these electrodes, the external power source can be conveniently connected to the heating module to realize the input and output of the current.

[0031] Further, as a preferred embodiment of the present application but not limited, the heating sheet 21 is provided with an insulating sleeve 22. The insulating sleeve 22 tightly wraps the outside of the heating sheet 21, forming a complete protective layer to prevent external dust, moisture or other contaminants from entering the inside and affecting the performance of the heating element. By isolating the heating sheet 21 from the external environment, the insulating sleeve 22 effectively prevents current leakage and improves the safety of the entire heating module.

[0032] Optionally, in some embodiments, the material of the insulating sleeve 22 is one or a combination of polyimide, plastic, and silica gel.

[0033] Further, as a preferred embodiment of the present application but not limited, the heating assembly is provided with a shell 1, and the material of the shell 1 is aluminum alloy. Aluminum alloy has high strength and low density, making the heating module both strong and light. Aluminum alloy has excellent heat conduction performance, which can quickly transfer heat from the inside to the outside, improve the heat dissipation efficiency, and avoid local overheating.

[0034] Further, as a preferred embodiment of the present application but not limited, the ordinary ceramic sheet 213 is arranged between two PTC ceramic sheets 214. The ordinary ceramic sheet 213 is located between the two PTC ceramic sheets 214, forming a sandwich structure of "PTC ceramic sheet 214-ordinary ceramic sheet 214-PTC ceramic sheet 214", so that heat can be transferred from one side of the PTC ceramic sheet 214 to the other side of the PTC ceramic sheet 214 through the ordinary ceramic sheet 213. Since the ordinary ceramic sheet 213 has good heat conduction performance, the ordinary ceramic sheet 213 can help to distribute heat more evenly and reduce the formation of local hot spots. This can ensure that the temperature of the entire heating area is more uniform, improving the heating efficiency and temperature control accuracy.

[0035] Embodiment one:

[0036] The utility model provides a kind of heating module, including heating component 2, the heating component 2 includes heating sheet 21, the heating sheet 21 includes first electrode sheet 211, second electrode sheet 215, at least one PTC ceramic sheet 214 is provided between the first electrode sheet 211 with the second electrode sheet 215, at least one ordinary ceramic sheet 213 is provided between the first electrode sheet 211 with the second electrode sheet 215.When external power supply is connected to first electrode sheet 211 and second electrode sheet 215, current passes through these electrode sheets into heating sheet 21. Current flows through PTC ceramic sheet 214, due to the characteristics of PTC material, with the increase of temperature, its resistance value will increase significantly, thereby limiting the current passing, prevent overheating. PTC ceramic sheet 214 starts to heat after being energized, heat is transferred to adjacent ordinary ceramic sheet 213 by heat conduction. Ordinary ceramic sheet 213 although not with self-limiting temperature characteristics, but can be used as heat conduction medium, help the heat generated by PTC ceramic sheet 214 evenly distributed to entire heating area. By reasonably designing the position and quantity of ordinary ceramic sheet 213, the temperature uniformity of entire heating surface can be effectively improved, and the formation of local hot spots is reduced. Through this combination design, heating module not only can provide more uniform heat distribution, but also can reduce cost to some extent, because ordinary ceramic sheet is usually lower in cost than PTC ceramic sheet.

[0037] The ordinary ceramic sheet 213 and the PTC ceramic sheet 214 are provided with conductive glue between the first electrode sheet 211, the ordinary ceramic sheet 213 and the PTC ceramic sheet 214 are provided with conductive glue between the second electrode sheet 215, and the conductive glue is silver-based conductive glue. Conductive glue can ensure good electrical contact between electrode sheet and ceramic sheet, reduce contact resistance, thereby improving the efficiency and stability of current passing, and tight electrical connection helps to evenly distribute current, avoiding the occurrence of local overheating phenomenon. Conductive glue not only has the function of conducting electricity, but also has a certain heat conduction capacity, which can help heat transfer from ceramic sheet to electrode sheet, and then dissipate through electrode sheet. In this way, the heat distribution of the entire heating module can be further improved, and the heating is more uniform. Conductive glue can also provide additional mechanical bonding force, enhance the structural stability of the entire heating component, prevent loosening or falling off due to vibration or impact.

[0038] The width of the common ceramic sheet 213 and the PTC ceramic sheet 214 is consistent with the width of the second electrode sheet 215, and the width of the common ceramic sheet 213 and the PTC ceramic sheet 214 is consistent with the width of the first electrode sheet 211. The width of the common ceramic sheet 213 and the PTC ceramic sheet 214 is consistent with the width of the electrode sheet, thereby ensuring that the contact area between the electrode sheet and the ceramic sheet is maximized, thereby reducing the contact resistance, improving the efficiency of current passing, and the heat can be more evenly transferred from the ceramic sheet to the electrode sheet and then dissipated through the electrode sheet, avoiding the occurrence of local overheating.

[0039] The first electrode sheet 211 is provided with a first electrode 212 on one side, and the second electrode sheet 215 is provided with a second electrode 216 on one side. The first electrode 212 is arranged on one side of the first electrode sheet 211 and used for being connected with one terminal of an external power supply, and the second electrode 216 is arranged on one side of the second electrode sheet 215 and used for being connected with another terminal of the external power supply. Through the electrodes, the external power supply can be conveniently connected to the heating module to realize the input and output of current.

[0040] The common ceramic sheet 213 is arranged between the two PTC ceramic sheets 214. The common ceramic sheet 213 is located between the two PTC ceramic sheets 214 to form a sandwich structure of “PTC ceramic sheet 214-common ceramic sheet 214-PTC ceramic sheet 214”, so that the heat can be transferred from the PTC ceramic sheet 214 on one side to the PTC ceramic sheet 214 on the other side through the common ceramic sheet 213. Since the common ceramic sheet 213 has good heat conduction performance, the common ceramic sheet 213 can help to more evenly distribute the heat and reduce the formation of local hot spots. This can ensure that the temperature of the entire heating area is more uniform, improving the heating efficiency and temperature control accuracy.

[0041] The heating sheet 21 is provided with an insulating sleeve 22. The material of the insulating sleeve 22 is polyimide. The insulating sleeve 22 tightly wraps the outside of the heating sheet 21 to form a complete protective layer, preventing external dust, moisture or other contaminants from entering the inside and affecting the performance of the heating element. By isolating the heating sheet 21 from the external environment, the insulating sleeve 22 effectively prevents current leakage and improves the safety of the entire heating module.

[0042] The heating assembly is provided with a shell 1, and the material of the shell 1 is aluminum alloy. The aluminum alloy has high strength and low density, so that the heating module is both solid and light, and the aluminum alloy has excellent heat conduction performance, which can quickly transfer heat from the inside to the outside, improve the heat dissipation efficiency, and avoid local overheating.

[0043] Specifically, the working principle of the utility model is as follows:

[0044] When an external power source is connected to the first electrode 212 and the second electrode 216, an electric current enters the heating sheet 21 through the first electrode sheet 211 and the second electrode sheet 215. The current flows through the PTC ceramic sheet 214, which has a positive temperature coefficient characteristic, and the resistance increases significantly as the temperature rises, thereby limiting the passing current and preventing overheating. The PTC ceramic sheet 214 starts to heat up after being powered on, and the heat is transferred to the adjacent normal ceramic sheet 213 through the conductive adhesive. The normal ceramic sheet 213 acts as a heat conduction medium, helping to evenly distribute the heat generated by the PTC ceramic sheet 214 throughout the entire heating area, reducing the formation of local hot spots, and achieving more uniform heat distribution.

[0045] The normal ceramic sheet 213 and the PTC ceramic sheet 214 are provided with silver-based conductive adhesive between the electrode sheets, ensuring good electrical contact, reducing contact resistance, and improving the efficiency and stability of current passing. The conductive adhesive not only has a conductive function, but also has a certain heat conduction capacity, which helps to transfer heat from the ceramic sheet to the electrode sheet and then dissipate through the electrode sheet, further improving heat distribution. In addition, the conductive adhesive provides additional mechanical bonding force, enhancing the structural stability of the entire heating assembly and preventing loosening or falling off due to vibration or impact. The width of the normal ceramic sheet 213 and the PTC ceramic sheet 214 is consistent with the width of the electrode sheet, ensuring maximum contact area, reducing contact resistance, improving current passing efficiency, and allowing heat to be evenly transmitted.

[0046] The heating sheet 21 is provided with an insulating sleeve 22 made of polyimide material, forming a complete protective layer to prevent external dust, moisture or other contaminants from entering the interior and affecting the performance of the heating element. The insulating sleeve 22 effectively prevents current leakage and improves the safety of the entire heating module. The heating assembly 2 is further provided with an aluminum alloy shell 1, which has high strength and excellent heat conduction performance, allowing heat to be quickly transferred from the interior to the exterior, improving heat dissipation efficiency and avoiding local overheating.

[0047] In summary, the utility model solves the problem of uneven heat distribution of traditional PTC ceramic sheets.

[0048] It should be understood that the terms "first", "second" and the like in the present application are used to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the "first" information can also be referred to as "second" information, and similarly, the "second" information can also be referred to as "first" information. In addition, the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0049] The above is the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications are also considered within the scope of protection of the present application.

Claims

1. A heating module comprising a heating assembly (2), the heating assembly (2) comprising a heating sheet (21), characterized in that, The heating sheet (21) comprises a first electrode sheet (211) and a second electrode sheet (215), at least one PTC ceramic sheet (214) is arranged between the first electrode sheet (211) and the second electrode sheet (215), and at least one ordinary ceramic sheet (213) is arranged between the first electrode sheet (211) and the second electrode sheet (215).

2. A heating module according to claim 1, characterized in that The ordinary ceramic sheet (213) and the PTC ceramic sheet (214) are arranged with conductive glue between the first electrode sheet (211) and the second electrode sheet (215).

3. A heating module according to claim 1, characterized in that The width of the ordinary ceramic sheet (213) and the PTC ceramic sheet (214) is consistent with the width of the second electrode sheet (215), and the width of the ordinary ceramic sheet (213) and the PTC ceramic sheet (214) is consistent with the width of the first electrode sheet (211).

4. The heating module of claim 1, wherein, One side of the first electrode sheet (211) is provided with a first electrode (212), and one side of the second electrode sheet (215) is provided with a second electrode (216).

5. The heating module of claim 1, wherein, The heating sheet (21) is provided with an insulating sleeve (22).

6. The heating module of claim 1, wherein, The heating assembly is provided with a shell (1).

7. The heating module of claim 1, wherein, The ordinary ceramic sheet (213) is arranged between two PTC ceramic sheets (214).

8. A heating module according to claim 5, wherein, The material of the insulating sleeve (22) is one of polyimide, plastic and silica gel.

9. A heating module according to claim 6, wherein, The material of the shell (1) is aluminum alloy.

10. The heating module of claim 2, wherein, The conductive glue is one of silver-based conductive glue, nickel-based conductive glue and carbon-based conductive glue.

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