PTC heating element with hot runner structure

Abstract

The utility model relates to the technical field of PTC (Positive Temperature Coefficient) heating elements, in particular to a PTC heating element with a hot runner structure, which comprises a first shell, a second shell is fixedly arranged at the front end of the first shell, a plurality of PTC ceramic chips are arranged on the opposite surfaces of the first shell and the second shell, and the PTC ceramic chips are arranged in the first shell and the second shell. The lock rod PTC ceramic pieces on the opposite faces of the first shell and the second shell are distributed in a staggered mode, a bottom plate is fixedly installed at the bottoms of the first shell and the second shell, a top cover is fixedly installed at the tops of the first shell and the second shell, and a fixing assembly is installed among the first shell, the second shell, the bottom plate and the top cover. Connecting blocks are fixedly installed on the two sides of the outer walls of the first shell and the second shell. According to the utility model, through the cooperation of the clamping block and the clamping groove in the fixing assembly and the reinforcement of the locking block and the bolt, the problems that the existing element is single in fixing mode and the interior is easily influenced by the outside are solved, efficient heat dissipation is realized by using the heat dissipation channel, and the structural stability and the working reliability are improved.

Description

Technical Field

[0001] This utility model relates to the field of PTC heating elements, and in particular to a PTC heating element containing a heat flow channel structure. Background Technology

[0002] With social development, PTC heating elements have been widely used in many fields due to their many excellent characteristics. PTC (Positive Temperature Coefficient) thermistors have advantages such as constant temperature heating, no open flame, high heat conversion rate, and minimal impact from power supply voltage.

[0003] Chinese utility model patent CN202321499437.5 discloses a PTC heating element with a hot runner structure, comprising: a first shell and a second shell. The inner sides of the first and second shells are provided with a plurality of groups of PTC ceramic plates, which are evenly spaced. The spacing between the groups of PTC ceramic plates is exactly the same as the width of the ceramic plates. The second shell is installed inside the first shell, with the PTC ceramic plates spaced apart. During installation, the second shell is installed inside the first shell, with the PTC ceramic plates spaced apart. A connector is provided at the connection between the first and second shells, extending to the outside of both shells and fitted with a fixing nut. This arrangement ensures the stability of the installation of the first and second shells. An electrode plug is threaded onto the surface of the connector. This PTC heating element is detachable, facilitating maintenance and replacement.

[0004] However, in actual use, the aforementioned patent uses bolts to fix the first and second outer shells, leaving the internal structure exposed. On the one hand, relying solely on bolts for fixation means that the bolts may loosen under external forces such as vibration and impact, leading to an unstable connection between the outer shells. This affects the normal operation of the PTC heating element and may even damage internal components such as the PTC ceramic plate. On the other hand, the exposed internal structure is easily corroded by external factors such as dust and moisture, which not only reduces the heat dissipation performance of the element but may also cause faults such as short circuits, shorten the lifespan of the element, and increase safety hazards. Utility Model Content

[0005] In view of this, the present invention provides a PTC heating element with a hot runner structure. The main technical problem to be solved is to address the issues of the existing PTC heating element having a single fixing method and its internal structure being easily affected by external factors.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a PTC heating element with a hot runner structure, comprising a first outer shell, a second outer shell fixedly mounted on the front end of the first outer shell, PTC ceramic plates being provided on the opposite surfaces of the first and second outer shells, wherein there are multiple PTC ceramic plates, the PTC ceramic plates on the opposite surfaces of the first and second outer shells are staggered, a base plate is fixedly mounted on the bottom of the first and second outer shells, a top cover is fixedly mounted on the top of the first and second outer shells, a fixing assembly is installed between the first outer shell, the second outer shell, the base plate and the top cover, and connecting blocks are fixedly mounted on both sides of the outer walls of the first and second outer shells;

[0007] The fixing assembly includes a first locking block, a second locking block, a third locking block, a fourth locking block, and a locking block. The first locking block is fixedly connected to the outer wall of the first housing near the side of the second housing. The second locking block is fixedly connected to the outer wall of the second housing near the side of the first housing. The third locking block is fixedly connected to the top of the base plate. The fourth locking block is fixedly connected to the connecting block near the side of the first housing. The locking block is fixedly connected to the bottom of the top cover.

[0008] By adopting the above technical solution, multiple locking blocks and latches work together to achieve a stable connection between the first outer shell, the second outer shell, the bottom plate, and the top cover, thereby enhancing the stability of the overall structure.

[0009] As a further description of the above technical solution: the fixing component also includes a first card slot, a second card slot, a third card slot, a fourth card slot and a fifth card slot, the first card slot is opened inside the first card block, the second card slot is opened inside the second card block, the third card slot is opened inside the first card block, the second card block and the third card block, the fourth card slot is opened inside the fourth card block, and the fifth card slot is opened on the top of the second card block and the third card block.

[0010] By adopting the above technical solution, the slot and the block cooperate with each other to further improve the connection accuracy and stability of the fixing components, making the installation between the components more compact.

[0011] As a further description of the above technical solution: the second card block is located inside the first card slot, the third card block is located inside the second card slot, the fourth card block is located inside multiple third card slots, and the locking block is installed inside the fourth card slot through two fifth card slots.

[0012] By adopting the above technical solution, the tight nesting and locking between the components are achieved, the fixing effect is enhanced, and the relative displacement between the components is effectively prevented.

[0013] As a further description of the above technical solution: the top cover has internal threads for mounting bolts, and the bolts are threaded through the top cover and mounted on the top of the first outer shell and the second outer shell.

[0014] By adopting the above technical solution, the bolts further strengthen the connection between the top cover and the first and second outer shells, improve the overall structural strength, and ensure the stability of the PTC heating element during use.

[0015] As a further description of the above technical solution: heat dissipation channels are provided inside the first outer shell, the second outer shell, and the top cover, and there are multiple heat dissipation channels distributed in a rectangular shape.

[0016] By adopting the above technical solution, the heat dissipation channel can effectively improve the heat dissipation efficiency of PTC heating elements, ensure that the elements maintain good heat dissipation performance during operation, and extend the service life of the elements.

[0017] As a further description of the above technical solution: an electrode is fixedly connected to the end of the connecting block away from the fourth card block.

[0018] By adopting the above technical solution, it is convenient to connect the PTC heating element to the external circuit, ensuring that the current can be smoothly transmitted to the PTC ceramic plate, so that the element can heat up and work normally.

[0019] By employing the above technical solution, the PTC heating element containing a hot runner structure of this utility model has at least the following beneficial effects:

[0020] Compared with existing technologies, this PTC heating element with a hot runner structure, through the setting of fixing components, allows the components to be nested together during use. Combined with the fixing effect of locking blocks and bolts, it achieves a stable and fixed installation of the whole. Compared with fixing only with bolts, it enhances the stability of the structure, effectively avoids the loosening and damage of components caused by external forces, and improves the reliability of the PTC heating element.

[0021] Compared with existing technologies, this PTC heating element with a heat flow channel structure achieves efficient heat dissipation by setting heat dissipation channels that are rectangularly distributed inside the first shell, the second shell, and the top cover. This allows the heat generated by the PTC ceramic sheet to be dissipated in a timely manner, reducing the internal temperature of the element and preventing overheating from affecting the element's performance and lifespan, thus improving the element's operational stability and safety. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a PTC heating element with a heat flow channel structure proposed in this utility model.

[0023] Figure 2This is a schematic diagram of the internal structure of a PTC heating element with a heat flow channel structure proposed in this utility model;

[0024] Figure 3 This is an exploded structural diagram of a PTC heating element with a heat flow channel structure proposed in this utility model;

[0025] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0026] Figure 5 for Figure 3 Another perspective structural diagram;

[0027] Figure 6 for Figure 5 Enlarged structural diagram at point B;

[0028] Figure 7 This is a cross-sectional structural diagram of a PTC heating element with a heat flow channel structure proposed in this utility model;

[0029] Figure 8 for Figure 7 Enlarged structural diagram at point C.

[0030] Legend:

[0031] 1. First outer shell; 2. Second outer shell; 3. PTC ceramic sheet; 4. Base plate; 5. Top cover; 6. Connecting block; 7. Fixing assembly; 701. First locking block; 702. First locking slot; 703. Second locking block; 704. Second locking slot; 705. Third locking block; 706. Third locking slot; 707. Fourth locking block; 708. Fourth locking slot; 709. Fifth locking slot; 710. Locking block; 8. Bolt; 9. Heat dissipation channel; 10. Electrode. Detailed Implementation

[0032] Reference Figure 1-8This utility model provides a PTC heating element with a hot runner structure: It includes a first outer shell 1, and a second outer shell 2 fixedly mounted on the front end of the first outer shell 1. PTC ceramic plates 3 are provided on the opposite surfaces of the first outer shell 1 and the second outer shell 2. The PTC ceramic plates 3 are the core components of the heating element, generating heat when energized. The staggered distribution of multiple PTC ceramic plates 3 increases the heating area and improves heating efficiency. The staggered distribution design allows for more even heat dissipation, improving heating uniformity and avoiding localized overheating. A base plate 4 is fixedly installed at the bottom of shell 2. A top cover 5 is fixedly installed at the top of the first shell 1 and the second shell 2. A fixing component 7 is installed between the first shell 1, the second shell 2, the base plate 4, and the top cover 5. The fixing component 7 is the key to achieving a stable connection between the components. Through the cooperation of multiple locking blocks and slots, as well as the action of locking blocks 710 and bolts 8, the connection between the components is ensured to be tight, preventing loosening and displacement. Connecting blocks 6 are fixedly installed on both sides of the outer walls of the first shell 1 and the second shell 2. The connecting blocks 6 are used to connect external circuits to provide power to the PTC ceramic sheet 3. At the same time, the fourth locking block 707 on its outer wall participates in the connection of the fixing component 7, enhancing the stability of the overall structure. The fixing component 7 includes a first locking block 701, a second locking block 703, a third locking block 705, a fourth locking block 707, and a locking block 710. The first locking block 701 is fixedly connected to the outer wall of the first outer shell 1 near the side of the second outer shell 2. The first locking block 701 cooperates with the first locking slot 702 to connect the first outer shell 1 and the second outer shell 2. The second locking block 703 is fixedly connected to the outer wall of the second outer shell 2 near the side of the first outer shell 1. The second locking block 703 cooperates with the first locking block 701 and, by inserting into the first locking slot 702, achieves positioning and connection of the first outer shell 1 and the second outer shell 2. The third locking block 705 is fixedly connected to the top of the base plate 4 and is used to connect the base plate 4. The second outer shell 2 and the connecting block 6, through cooperation with the second slot 704 and the third slot 706, enhance the connection strength of the overall structure. The fourth slot 707 is fixedly connected to the side of the connecting block 6 near the first outer shell 1. The fourth slot 707, through cooperation with the third slot 706 and the fourth slot 708, tightly connects the connecting block 6 with the first outer shell 1, the second outer shell 2 and the top cover 5, improving the stability of the overall structure. The locking block 710 is fixedly connected to the bottom of the top cover 5. The locking block 710 passes through the fifth slot 709 and is installed in the fourth slot 708, further locking the components and preventing relative displacement between them, ensuring that the connection of the fixing assembly 7 is firm and reliable.

[0033] The fixing component 7 also includes a first slot 702, a second slot 704, a third slot 706, a fourth slot 708, and a fifth slot 709. The first slot 702 is located inside the first locking block 701 and cooperates with the second locking block 703 to connect the first outer shell 1 and the second outer shell 2. The second slot 704 is located inside the second locking block 703 and cooperates with the third locking block 705 to connect the second outer shell 2 to the base plate 4. The third slot 706 is located between the first locking block 701, the second locking block 703, and the third locking block 705. Inside, the third slot 706 provides an installation position for the fourth slot 707, allowing the connecting block 6 to be tightly connected to the first housing 1, the second housing 2, and the base plate 4. The fourth slot 708 is located inside the fourth slot 707 and cooperates with the locking block 710 to further lock the components and prevent them from loosening or shifting. The fifth slot 709 is located on top of the second slot 703 and the third slot 705. The fifth slot 709 provides an installation position for the locking block 710, allowing the locking block 710 to penetrate and lock the components, thereby enhancing the connection strength of the fixing assembly 7.

[0034] The second locking block 703 is located inside the first locking slot 702, ensuring the tightness and accuracy of the connection, allowing the two outer shells to fit tightly together and preventing displacement. The third locking block 705 is located inside the second locking slot 704, allowing the base plate 4 to stably support the second outer shell 2 and internal components. The fourth locking block 707 is located inside multiple third locking slots 706, tightly connecting the connecting block 6 to the first outer shell 1, the second outer shell 2, and the base plate 4, enhancing the overall structural stability. The locking block 710 passes through two fifth locking slots 709 and is installed inside the fourth locking slot 708, further locking the components and preventing them from loosening or shifting.

[0035] Bolts 8 are installed on the internal threads of the top cover 5. Bolts 8 pass through the top cover 5 and are threaded on the top of the first outer shell 1 and the second outer shell 2. Bolts 8 connect the top cover 5 to the first outer shell 1 and the second outer shell 2, improving the overall structural strength.

[0036] The first outer shell 1, the second outer shell 2, and the top cover 5 are provided with heat dissipation channels 9. There are multiple heat dissipation channels 9 distributed in a rectangular shape. The heat dissipation channels 9 can effectively improve the heat dissipation efficiency of the PTC heating element, dissipate the heat generated by the PTC ceramic plate 3 in a timely manner, ensure that the element maintains good heat dissipation performance during operation, extend the service life of the element, and avoid damage or performance degradation of the element due to overheating.

[0037] An electrode 10 is fixedly connected to the end of the connecting block 6 away from the fourth card block 707. The electrode 10 facilitates the connection of the PTC heating element to the external circuit, ensuring that the current can be smoothly transmitted to the PTC ceramic plate 3.

[0038] Working principle: First, the first outer shell 1 and the second outer shell 2 are spliced ​​together. Since the first locking block 701 is fixed on the side of the first outer shell 1 near the second outer shell 2, the second locking block 703 is precisely embedded into the first locking slot 702. At the same time, the multiple PTC ceramic sheets 3 on the opposite sides of the two are staggered. This staggered layout can effectively increase the heating area and improve the heating efficiency.

[0039] Then, the third locking block 705 on the top of the base plate 4 is engaged with the second locking slot 704 at the bottom of the second outer shell 2 to complete the connection between the base plate 4 and the bottom of the first outer shell 1 and the second outer shell 2.

[0040] Next, the fourth card block 707 of the connecting block 6 is inserted into the multiple third card slots 706 formed by the first card block 701, the second card block 703 and the third card block 705, so that the connecting block 6 is tightly connected to the first outer shell 1, the second outer shell 2 and the base plate 4.

[0041] Next, the top cover 5 is installed on top of the first outer shell 1 and the second outer shell 2. The locking block 710 at the bottom of the top cover 5 passes through the fifth slot 709 at the top of the second locking block 703 and the third locking block 705 in sequence, and finally embeds into the fourth slot 708 inside the fourth locking block 707 to lock the fourth locking block 707, further stabilizing the connection between the components. By screwing the bolt 8 into the inside of the top cover 5, the connection between the top cover 5 and the first outer shell 1 and the second outer shell 2 is realized, ensuring that the entire PTC heating element structure is firm and that the components will not loosen or shift due to external forces or other factors during use.

[0042] When the PTC heating element is connected to an external circuit, current flows in through the electrode 10 at one end of the connecting block 6 and is transmitted to the PTC ceramic plate 3. The PTC ceramic plate 3 has a positive temperature coefficient thermistor characteristic. After being energized, its resistance value will increase as its temperature rises. When the temperature reaches a certain specific value, the resistance rises sharply and the current passing through decreases, thereby keeping the heat generated by the PTC ceramic plate 3 at a relatively stable level and achieving constant temperature heating.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A PTC heating element with a hot runner structure, comprising a first housing (1), wherein a second housing (2) is fixedly mounted on the front end of the first housing (1), characterized in that: PTC ceramic plates (3) are provided on the opposite surfaces of the first outer shell (1) and the second outer shell (2). There are multiple PTC ceramic plates (3). The PTC ceramic plates (3) on the opposite surfaces of the first outer shell (1) and the second outer shell (2) are staggered. A base plate (4) is fixedly installed at the bottom of the first outer shell (1) and the second outer shell (2). A top cover (5) is fixedly installed at the top of the first outer shell (1) and the second outer shell (2). A fixing component (7) is installed between the first outer shell (1), the second outer shell (2), the base plate (4) and the top cover (5). Connecting blocks (6) are fixedly installed on both sides of the outer walls of the first outer shell (1) and the second outer shell (2). The fixing component (7) includes a first locking block (701), a second locking block (703), a third locking block (705), a fourth locking block (707), and a locking block (710). The first locking block (701) is fixedly connected to the outer wall of the first outer shell (1) near the side of the second outer shell (2). The second locking block (703) is fixedly connected to the outer wall of the second outer shell (2) near the side of the first outer shell (1). The third locking block (705) is fixedly connected to the top of the base plate (4). The fourth locking block (707) is fixedly connected to the connecting block (6) near the side of the first outer shell (1). The locking block (710) is fixedly connected to the bottom of the top cover (5).

2. The PTC heating element with a heat flow channel structure according to claim 1, characterized in that: The fixing component (7) further includes a first slot (702), a second slot (704), a third slot (706), a fourth slot (708), and a fifth slot (709). The first slot (702) is located inside the first block (701), the second slot (704) is located inside the second block (703), the third slot (706) is located inside the first block (701), the second block (703), and the third block (705), the fourth slot (708) is located inside the fourth block (707), and the fifth slot (709) is located on top of the second block (703) and the third block (705).

3. A PTC heating element with a heat flow channel structure according to claim 2, characterized in that: The second card block (703) is located inside the first card slot (702), the third card block (705) is located inside the second card slot (704), the fourth card block (707) is located inside the multiple third card slots (706), and the locking block (710) is installed inside the fourth card slot (708) through the two fifth card slots (709).

4. A PTC heating element with a heat flow channel structure according to claim 1, characterized in that: The top cover (5) is threaded with a bolt (8), which passes through the top cover (5) and is threaded onto the top of the first outer shell (1) and the second outer shell (2).

5. A PTC heating element with a heat flow channel structure according to claim 1, characterized in that: The first outer shell (1), the second outer shell (2) and the top cover (5) are provided with heat dissipation channels (9), and there are multiple heat dissipation channels (9) distributed in a rectangular shape.

6. A PTC heating element with a heat flow channel structure according to claim 1, characterized in that: An electrode (10) is fixedly connected to one end of the connecting block (6) away from the fourth card block (707).

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