PTC (Positive Temperature Coefficient) module with thermal protection bracket

Abstract

The utility model relates to the technical field of PTC (Positive Temperature Coefficient) heating, and discloses a PTC module with a thermal protection bracket, which comprises a head bracket, a first mounting groove and a second mounting groove are inwards formed in the surface of the same side of the head bracket, a PTC heating core is arranged in the first mounting groove, and a heat dissipation strip is arranged in the second mounting groove; a temperature controller used for measuring the temperature of the outer surface of the heat dissipation strip is assembled in the head support, the outer surface of the PTC heating core is connected with a leading-out wire, and the leading-out wire and the temperature controller are connected to a fuse through circuits. A mounting space is formed between the first mounting groove and the second mounting groove through height difference, and the lead-out wire is communicated to an external power supply through the mounting space; the PTC module with the thermal protection support has the advantages of being good in stability, high in sealing performance, accurate in temperature control and convenient and fast to replace.

Description

Technical Field

[0001] This utility model relates to the field of PTC heating technology, specifically a PTC module with a heat protection bracket. Background Technology

[0002] A PTC heater, or positive temperature coefficient thermistor heater, is a heating element made of PTC material. Its structure typically includes a PTC heating element, a support base, electrodes, and possibly heat sinks. The PTC heating element is the core component of the heater, responsible for converting electrical energy into heat energy.

[0003] In existing PTC brackets, when the heating power is large or the shape is special and the winding is complex, the thermal protector may not be able to provide comprehensive temperature monitoring. Furthermore, under long-term high-temperature operation, the performance of traditional PTC brackets may decline due to material aging or structural instability. The sealing of the bracket may also be affected, allowing moisture or dust to enter the interior and affecting the service life of the heater. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a PTC module with a thermal protection bracket, which has the advantages of good stability, strong sealing, precise temperature control, and convenient replacement. It solves the problems of existing thermal protectors that may not provide comprehensive temperature monitoring and have unstable structures.

[0006] (II) Technical Solution

[0007] To achieve the aforementioned goals of good stability, strong sealing, precise temperature control, and convenient replacement, this utility model provides the following technical solution: A PTC module with a thermal protection bracket, including a head bracket. The head bracket has a first mounting groove and a second mounting groove formed inwards on the same side surface. A PTC heating element is disposed inside the first mounting groove, and a heat sink is disposed inside the second mounting groove. A temperature controller for measuring the outer surface temperature of the heat sink is installed inside the head bracket. A lead wire is connected to the outer surface of the PTC heating element, and both the lead wire and the temperature controller are connected to a fuse via wiring. The upper ends of both the first and second mounting grooves are hollowed out. The upper end of the first mounting groove is lower than the upper end of the second mounting groove, and the height difference between them forms an installation space. The lead wire is connected to an external power source through the installation space.

[0008] Preferably, there are two second mounting slots, which are respectively arranged on the left and right sides of the first mounting slot; the first mounting slot and the second mounting slot are connected, and the PTC heating core installed inside the first mounting slot and the second mounting slot is in close contact with the heat dissipation strips on both sides.

[0009] Preferably, the upper end of the head bracket has a limiting groove that communicates with the second mounting groove, and the temperature controller is disposed inside the limiting groove.

[0010] Preferably, a locking hook is provided inside the limiting groove, and the upper surface of the locking hook is an inclined surface, which limits the temperature controller in the vertical direction.

[0011] Preferably, the width of the limiting groove is smaller than the thickness of the temperature controller, and when the temperature controller is inside the limiting groove, it is in close contact with the heat sink.

[0012] Preferably, the length of the first mounting groove is greater than that of the second mounting groove; the length of the PTC heating element is the same as that of the heat sink.

[0013] Preferably, the PTC bracket includes a tail bracket, and a fixing groove is formed on the surface of the tail bracket opposite to the head bracket. The fixing groove, the first mounting groove, and the second mounting groove are respectively located at the two ends of the PTC heating core and the heat sink, and are limited and fixed in the middle of the two.

[0014] Preferably, aluminum strips are provided at the four corners of the fixing groove to protect the steps.

[0015] Preferably, both the head support and the tail support have through-holes for evaporating gas on their two side surfaces.

[0016] Preferably, both sides of the head bracket and the tail bracket are provided with countersunk holes corresponding to their positions, and the head bracket and the tail bracket are connected to the fixing point through the countersunk holes.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, this utility model provides a PTC module with a thermal protection bracket, which has the following advantages:

[0019] 1. This PTC module with a thermal protection bracket has a hollowed-out upper end for both the first and second mounting slots, extending from the side surface to the upper surface. The height of the upper end of the first mounting slot is lower than that of the upper end of the second mounting slot, thus creating a mounting space. The lead wire connecting the PTC heating element and the battery is installed inside this mounting space. Simultaneously, the length of the first mounting slot is greater than that of the second mounting slot, with the excess portion also used to accommodate the lead wire. This design facilitates the formation of a natural arc-shaped bend in the lead wire, ensuring a stable connection compared to existing technologies, avoiding compression and stacking of the lead wire, preventing damage and heat buildup, and increasing the service life of the lead wire.

[0020] 2. This PTC module with a thermal protection bracket, by connecting the first and second mounting slots, tightly connects the heat sink and the PTC heating element, ensuring the heat dissipation efficiency of the heat sink. Simultaneously, a limiting slot for placing a thermostat is provided at a corresponding position in the second mounting slot. The width of the limiting slot is less than the thickness of the thermostat, and the limiting slot communicates with the second mounting slot, ensuring the thermostat can fit snugly against the heat sink. A locking hook inside the limiting slot vertically limits the thermostat, preventing it from moving up and down within the slot, making the temperature measured by the thermostat more accurate. Furthermore, both the thermostat and the lead wire are connected to a fuse. When the thermostat detects that the heat sink temperature is too high, it transmits a signal to the fuse, triggering the fuse and cutting off the circuit, preventing the lead wire from connecting to the power supply. Compared with existing technologies, this provides a thermal protection function to the PTC heating element bracket, improving safety and avoiding safety hazards caused by overheating. Attached Figure Description

[0021] Figure 1 This is an exploded view of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the head support structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the tail support structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the overall assembled structure of this utility model;

[0025] Figure 5 This is a top view of the head support structure.

[0026] In the diagram: 1. Head bracket; 11. First mounting slot; 111. Heat sink; 12. Second mounting slot; 121. PTC heating element; 122. Lead wire; 13. Limiting slot; 131. Locking hook; 2. Temperature controller; 3. Fuse; 4. Tail bracket; 41. Fixing slot; 411. Aluminum strip protection step; 5. Evaporation vent; 6. Countersunk hole. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1-5 A PTC module with a thermal protection bracket includes a head bracket 1. A first mounting groove 11 and a second mounting groove 12 are formed inwardly on the same side surface of the head bracket 1. A PTC heating element 121 is disposed inside the first mounting groove 11, and a heat dissipation strip 111 is disposed inside the second mounting groove 12 to improve the heat dissipation efficiency of the PTC heating element 121. A temperature controller 2 for measuring the outer surface temperature of the heat dissipation strip 111 is installed inside the head bracket 1. Lead wires 122 are connected to the outer surface of the PTC heating element 121, and both the lead wires 122 and the temperature controller 2 are connected to a fuse 3 via wiring. When the temperature controller 2 detects that the temperature of the heat sink 111 is too high, it will send a signal to the fuse 3 to trigger the fuse 3 and cut off the circuit to avoid safety hazards caused by overheating. In this embodiment, a one-time fuse 3 is used. The upper ends of the first mounting groove 11 and the second mounting groove 12 are both hollowed out. The upper end of the first mounting groove 11 is lower than the upper end of the second mounting groove 12. The height difference between the two forms an installation space. The lead wire 122 is connected to the external power supply through the installation space. Compared with the prior art, the lead wire 122 is not squeezed, and the wire can be bent and placed naturally.

[0029] Please see Figure 4 and Figure 5 There are two second mounting slots 12, which are respectively set on the left and right sides of the first mounting slot 11; the first mounting slot 11 and the second mounting slot 12 are connected to ensure that the PTC heating core 121 can be tightly attached to the heat sink 111 to ensure heat dissipation efficiency.

[0030] Please see Figure 5The upper end of the head bracket 1 has a downward-facing limiting groove 13, which communicates with the second mounting groove 12. The thermostat 2 is installed inside the limiting groove 13, and the width of the limiting groove 13 is less than the thickness of the thermostat 2. When the thermostat 2 is inside the limiting groove 13, it is in close contact with the heat sink 111 to ensure the accuracy of the results measured by the thermostat 2. A locking hook 131 is provided inside the limiting groove 13. The upper surface of the locking hook 131 is inclined. In actual use, the user can press the thermostat 2 into the limiting groove 13 from top to bottom. The locking hook 131 limits the thermostat 2 in the vertical direction to prevent the thermostat 2 from shaking up and down inside the limiting groove 13.

[0031] Please see Figure 2 and Figure 5 The length of the first mounting slot 11 is greater than that of the second mounting slot 12. The length of the PTC heating core 121 is the same as that of the heat sink 111. Therefore, a space is created inside the first mounting slot 11 to allow the wire 122 to be connected to the power supply, which naturally forms a curved structure, thus avoiding pressure on the wire.

[0032] Please see Figure 3 and Figure 4 The PTC bracket includes a tail bracket 4. A fixing groove 41 is provided on the surface of the tail bracket 4 opposite to the head bracket 1. The fixing groove 41, the first mounting groove 11, and the second mounting groove 12 are located at the two ends of the PTC heating core 121 and the heat sink 111, respectively, and limit and fix them in the middle. The tail bracket 4 is used in conjunction with the head bracket 1 and its function is to completely limit the PTC heating core 121 and the heat sink 111.

[0033] In this embodiment, please refer to Figure 3 Aluminum strips are provided at the four corners of the fixing groove 41 to protect the stability, sealing and dielectric properties of the PTC heating element installed in the bracket.

[0034] Please see Figure 4 Both sides of the head support 1 and the tail support 4 are provided with evaporation pores 5 that run through the inside and outside. If the workpiece is working in a humid environment, the temperature of the PTC heating core 121 when heating can quickly evaporate the moisture in the air inside the support, and the water vapor formed will be discharged from the evaporation pores 5 of the two supports, making the overall structure safer.

[0035] Please see Figure 4 Both sides of the head bracket 1 and the tail bracket 4 are provided with countersunk holes 6 corresponding to their positions, and the head bracket 1 and the tail bracket 4 are connected to the fixing point through the countersunk holes 6.

[0036] In summary, compared with existing technologies, this PTC module with a thermal protection bracket can integrate the thermostat 2 and fuse 3 into a single heating module, offering advantages such as stability, heat resistance, cold resistance, water resistance, and insulation. It features simple assembly, a compact appearance, and strong practicality, reducing the complexity of separately assembling thermal insulation components and winding. The head bracket 1, where the thermostat 2 is mounted, has a groove at the bottom and a barb at the top, effectively ensuring a tight fit between the thermostat and the heating element. The head and tail brackets are respectively equipped with mounting grooves and fixing grooves 41, effectively securing the stability and sealing of the PTC heating element. Ventilation holes at both ends of the head and tail brackets allow for rapid evaporation of water vapor within the bracket in humid environments, enhancing safety.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A PTC module with a thermal protection bracket, comprising a head bracket (1), wherein a heat sink (111) and a PTC heating element (121) are disposed inside the head bracket (1), and a first mounting groove (11) and a second mounting groove (12) are provided on the same side surface of the head bracket (1), wherein the PTC heating element (121) is disposed inside the first mounting groove (11), and the heat sink (111) is disposed inside the second mounting groove (12); a temperature controller (2) for measuring the outer surface temperature of the heat sink (111) is assembled inside the head bracket (1), and an outgoing wire (122) is connected to the outer surface of the PTC heating element (121), wherein the outgoing wire (122) and the temperature controller (2) are both connected to a fuse (3) via a circuit, characterized in that: The upper ends of the first mounting slot (11) and the second mounting slot (12) are both hollowed out. The upper end of the first mounting slot (11) is lower than the upper end of the second mounting slot (12). The height difference between the two forms an installation space. The lead wire (122) is connected to an external power source through the installation space.

2. A PTC module with a thermal protection bracket according to claim 1, characterized in that: There are two second mounting slots (12), which are respectively set on the left and right sides of the first mounting slot (11); the first mounting slot (11) and the second mounting slot (12) are connected, and the PTC heating core (121) installed inside the first mounting slot (11) and the second mounting slot (12) is closely attached to the heat dissipation strips (111) on both sides.

3. A PTC module with a thermal protection bracket according to claim 1, characterized in that: The upper end of the head support (1) has a limiting groove (13) that is downwardly opened. The limiting groove (13) is connected to the second mounting groove (12). The temperature controller (2) is located inside the limiting groove (13).

4. A PTC module with a thermal protection bracket according to claim 3, characterized in that: The limiting groove (13) is provided with a locking hook (131), the upper surface of the locking hook (131) is an inclined surface, and the locking hook (131) limits the temperature controller (2) in the vertical direction.

5. A PTC module with a thermal protection bracket according to claim 3, characterized in that: The width of the limiting groove (13) is less than the thickness of the temperature controller (2), and the temperature controller (2) is in close contact with the heat sink (111) when it is inside the limiting groove (13).

6. A PTC module with a thermal protection bracket according to any one of claims 1-5, characterized in that: The length of the first mounting slot (11) is greater than that of the second mounting slot (12); the length of the PTC heating core (121) is the same as that of the heat sink (111).

7. A PTC module with a thermal protection bracket according to claim 1, characterized in that: The PTC module includes a tail bracket (4), and a fixing groove (41) is provided on the surface of the tail bracket (4) opposite to the head bracket (1). The fixing groove (41), the first mounting groove (11), and the second mounting groove (12) are located at the two ends of the PTC heating core (121) and the heat sink (111), respectively, and are fixed in the middle of the two.

8. A PTC module with a thermal protection bracket according to claim 7, characterized in that: Aluminum strip protective steps (411) are provided at the four corners of the fixing groove (41).

9. A PTC module with a thermal protection bracket according to any one of claims 7-8, characterized in that: Both sides of the head support (1) and the tail support (4) are provided with volatile air holes (5) that penetrate through the inside and outside.

10. A PTC module with a thermal protection bracket according to any one of claims 7-8, characterized in that: The head bracket (1) and the tail bracket (4) are provided with countersunk holes (6) on both sides, and the head bracket (1) and the tail bracket (4) are connected to the fixing point through the countersunk holes (6).

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