Chip type corrosion-resistant PTC (Positive Temperature Coefficient) heating body

Abstract

The utility model relates to the technical field of PTC (Positive Temperature Coefficient) heating bodies, in particular to a chip type corrosion-resistant PTC heating body, which comprises a heating element, an insulating layer is fixedly connected to the outer wall of the heating element, an anti-corrosion layer is fixedly connected to the outer wall of the insulating layer, and the anti-corrosion layer is made of a silicon rubber material, has good high-temperature resistance, corrosion resistance and insulating performance and is good in flexibility; electrodes are fixedly connected to the two ends of the heating element, connecting holes are formed in the electrodes, an upper shell is slidably connected to the outer wall of the anti-corrosion layer, a lower shell is slidably connected to the outer wall of the anti-corrosion layer, and the upper shell is arranged on the upper portion of the anti-corrosion layer. According to the utility model, the two ends of the heating element are connected with the electrodes, the insulating layer is fixed around the heating element, the anti-corrosion layer is added, the insulating layer prevents electrical short circuit and mechanical damage, the anti-corrosion layer is made of a silicone rubber material, is high-temperature resistant, corrosion resistant, insulating and flexible, and finally the upper and lower shells are clamped at the two ends of the anti-corrosion layer to form the PTC heating element, so that the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of PTC heating element technology, and in particular to a plate-type corrosion-resistant PTC heating element. Background Technology

[0002] A chip-type PTC heating element is a flat heating element made of positive temperature coefficient (PTC) material. A characteristic of PTC material is that its resistance increases rapidly with temperature, automatically limiting current and achieving temperature self-regulation to prevent overheating. The chip structure provides a large surface area, facilitating uniform heat distribution and rapid heat transfer.

[0003] In the existing technology, during the manufacturing process of PTC heating elements, the heating element is usually directly welded and fixed to the outer shell, which causes the outer surface of the heating element to be in direct contact with the outer shell. Although the PTC heating element can achieve temperature self-regulation to avoid overheating, the heating element is easily corroded by the environment when exposed to air for a long time, thus rendering it unusable. Utility Model Content

[0004] In view of this, the present invention provides a plate-type corrosion-resistant PTC heating element, the main technical problem to be solved is that the heating element is easily corroded when directly welded and fixed to the outer shell.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a plate-type corrosion-resistant PTC heating element, comprising a heating element, an insulating layer fixedly connected to the outer wall of the heating element, and an anti-corrosion layer fixedly connected to the outer wall of the insulating layer. The anti-corrosion layer is made of silicone rubber material, which has good high temperature resistance, corrosion resistance, insulation properties, and good flexibility. Electrodes are fixedly connected to both ends of the heating element, and connection holes are opened inside the electrodes. An upper shell is slidably connected to the outer wall of the anti-corrosion layer, and a lower shell is slidably connected to the outer wall of the anti-corrosion layer. The upper shell is disposed in the upper part of the anti-corrosion layer, and the lower shell is disposed in the lower part of the anti-corrosion layer.

[0006] By adopting the above technical solution, electrodes are fixedly connected to both ends of the outer wall of the heating element, an insulating layer is fixed around the outer wall of the heating element, and an anti-corrosion layer is fixed around the outer wall of the insulating layer. The insulating layer is used to prevent electrical short circuits and provide mechanical protection. The anti-corrosion layer is made of silicone rubber material, which has good high temperature resistance, corrosion resistance and insulation properties, good flexibility, and anti-corrosion effect. Then, the upper shell and the lower shell are respectively clipped to the upper and lower ends of the anti-corrosion layer, and they are combined and fixed to form a PTC heating element.

[0007] As a further description of the above technical solution: the upper housing has a slot 1 inside, the upper housing has a heat dissipation hole 1 inside, the anti-corrosion layer is slidably connected inside the slot 1, the lower housing has a slot 2 inside, the lower housing has a heat dissipation hole 2 inside, and the anti-corrosion layer is slidably connected inside the slot 2.

[0008] By adopting the above technical solution, slot one is used to hold the upper half of the anti-corrosion layer, slot two is used to hold the lower half of the anti-corrosion layer, and heat dissipation holes one and two play a heat dissipation role, preventing the heating element from getting too hot and facilitating air circulation to dissipate heat from the outside of the heating element.

[0009] As a further description of the above technical solution: a locking pin assembly is provided inside the upper housing, and the locking pin assembly is located inside the lower housing. The locking pin assembly includes a slider one and a slider two, which are slidably connected inside the upper housing and the lower housing.

[0010] By adopting the above technical solution, two sets of locking pin assemblies are provided, which are respectively set on the inner sides of the upper and lower housings. The locking pin assemblies are used to connect the upper and lower housings, limit and fix the upper and lower housings, and form a combination, which facilitates the combined use of multiple heating elements.

[0011] As a further description of the above technical solution: the outer wall of the slider is fixedly connected to a retaining shaft, and there are two retaining shafts, one of which is slidably connected to the inside of the upper housing, and the other of which is slidably connected to the inside of the lower housing.

[0012] By adopting the above technical solution, the slider drives the two locking shafts to slide, so that one locking shaft is locked inside the left side of the upper housing and the other locking shaft is locked inside the left side of the lower housing, thereby limiting and fixing the upper and lower housings.

[0013] As a further description of the above technical solution: the outer wall of the slider two is fixedly connected to the retaining shaft two, and two retaining shaft two are provided, one of which is slidably connected to the inside of the upper housing, and the other of which is slidably connected to the inside of the lower housing.

[0014] By adopting the above technical solution, the slider 2 drives the two retaining shafts 2 to slide, so that one retaining shaft 2 is locked inside the right side of the upper housing and the other retaining shaft 2 is locked inside the right side of the lower housing, thus connecting the upper housing and the lower housing together.

[0015] As a further description of the above technical solution: a spring is provided between the first slider and the second slider, one end of the spring is fixedly connected to the inside of the first slider, and the other end of the spring is fixedly connected to the inside of the second slider.

[0016] By adopting the above technical solution, the spring supports slider one and slider two, ensuring that slider one and slider two are always placed inside the upper and lower housings, thus assisting in the assembly and connection of the upper and lower housings.

[0017] By employing the above technical solution, the plate-type corrosion-resistant PTC heating element of this utility model has at least the following beneficial effects:

[0018] Compared with existing technologies, this type of plate-type corrosion-resistant PTC heating element connects electrodes to both ends of the heating element, fixes an insulating layer around it, and then adds an anti-corrosion layer. The insulating layer prevents electrical short circuits and mechanical damage, while the anti-corrosion layer is made of silicone rubber, which is resistant to high temperature, corrosion, insulation, and flexibility. Finally, the upper and lower shells are snapped onto both ends of the anti-corrosion layer to form a PTC heating element, thereby extending its service life.

[0019] Compared with existing technologies, this type of plate-type corrosion-resistant PTC heating element has an upper shell that is clipped onto the upper part of multiple anti-corrosion layers, and a lower shell that is clipped onto the lower part of the anti-corrosion layers. Two sets of locking pin assemblies are inserted into the inner sides of the upper and lower shells to limit and fix the upper and lower shells, so that the upper and lower shells can be combined with multiple heating elements to complete the assembly of the PTC heating element. Attached Figure Description

[0020] Figure 1 This is an overall structural diagram of a plate-type corrosion-resistant PTC heating element proposed in this utility model;

[0021] Figure 2 This is a diagram of the electrode structure of a plate-type corrosion-resistant PTC heating element proposed in this utility model;

[0022] Figure 3 This is a structural diagram of a plate-type corrosion-resistant PTC heating element proposed in this utility model;

[0023] Figure 4 This is a structural diagram of the anti-corrosion layer of a plate-type corrosion-resistant PTC heating element proposed in this utility model;

[0024] Figure 5 This is a structural diagram of a clip assembly for a plate-type corrosion-resistant PTC heating element proposed in this utility model;

[0025] Figure 6 This is a structural diagram of the shell of a plate-type corrosion-resistant PTC heating element proposed in this utility model.

[0026] Legend:

[0027] 1. Heating element; 101. Insulation layer; 102. Anti-corrosion layer; 103. Electrode; 104. Connecting hole; 2. Upper housing; 201. Slot 1; 202. Heat dissipation hole 1; 3. Lower housing; 301. Slot 2; 302. Heat dissipation hole 2; 4. Locking pin assembly; 401. Slider 1; 402. Locking shaft 1; 403. Slider 2; 404. Locking shaft 2; 405. Spring. Detailed Implementation

[0028] Reference Figure 1-6 This utility model provides a plate-type corrosion-resistant PTC heating element, comprising a heating element 1, an insulating layer 101 fixedly connected to the outer wall of the heating element 1, and an anti-corrosion layer 102 fixedly connected to the outer wall of the insulating layer 101. The anti-corrosion layer 102 is made of silicone rubber material, which has good high temperature resistance, corrosion resistance and insulation properties, and good flexibility. Electrodes 103 are fixedly connected to both ends of the heating element 1, and connection holes 104 are opened inside the electrodes 103 to facilitate the connection of power cords. An upper shell 2 and a lower shell 3 are slidably connected to the outer wall of the anti-corrosion layer 102. The upper shell 2 is located on the upper part of the anti-corrosion layer 102, and the lower shell 3 is located on the lower part of the anti-corrosion layer 102. The upper shell 2 protects the upper part of the anti-corrosion layer 102, and the lower shell 3 protects the lower part of the anti-corrosion layer 102. At the same time, the combination of the upper shell 2 and the lower shell 3 facilitates the combination of multiple heating elements 1 to form a PTC heating element.

[0029] The upper housing 2 has a slot 201 and a heat dissipation hole 202 inside. The anti-corrosion layer 102 is slidably connected inside the slot 201. The lower housing 3 has a slot 301 and a heat dissipation hole 302 inside. The anti-corrosion layer 102 is slidably connected inside the slot 301. The slots 201 and 301 facilitate the placement of multiple heating elements 1. The slots 201 and 301 clamp the upper and lower parts of the anti-corrosion layer 102 to fix the anti-corrosion layer 102, thereby fixing the heating element 1.

[0030] The upper housing 2 is internally equipped with a locking assembly 4, which is located inside the lower housing 3. The locking assembly 4 is used to limit and fix the upper housing 2 and the lower housing 3. The locking assembly 4 includes a first slider 401 and a second slider 403, which are slidably connected inside the upper housing 2 and the lower housing 3. A first locking shaft 402 is fixedly connected to the outer wall of the first slider 401. Two first locking shafts 402 are provided; one is slidably connected to the inside of the upper housing 2, and the other is slidably connected to the inside of the lower housing 3. The two first locking shafts 402 limit and lock the upper housing 2 and the lower housing 3. A second locking shaft is fixedly connected to the outer wall of the second slider 403. There are two locking shafts 404. One locking shaft 404 is slidably connected to the inside of the upper housing 2, and the other locking shaft 404 is slidably connected to the inside of the lower housing 3. The two locking shafts 404 are locked inside the upper housing 2 and the lower housing 3. A spring 405 is provided between the slider 1 401 and the slider 2 403. One end of the spring 405 is fixedly connected to the inside of the slider 1 401, and the other end of the spring 405 is fixedly connected to the inside of the slider 2 403. The spring 405 supports the slider 1 401 and the slider 2 403, and at the same time, the elasticity of the spring 405 makes it easy for the slider 1 401 and the slider 2 403 to be removed from the inside of the upper housing 2 and the lower housing 3.

[0031] Working principle: In use, firstly, connect electrodes 103 to both ends of the heating element 1. Make connection holes 104 inside the electrodes 103. Fix an insulating layer 101 around the outer wall of the heating element 1, and fix an anti-corrosion layer 102 around the outer wall of the insulating layer 101. The insulating layer 101 and the anti-corrosion layer 102 protect the heating element 1. The insulating layer 101 prevents electrical short circuits and provides mechanical protection. The anti-corrosion layer 102 is made of silicone rubber, which has good high-temperature resistance, corrosion resistance, and insulation properties, good flexibility, and provides anti-corrosion effect. Make five heating elements 1 in the same way. Then, insert the slot 201 inside the upper housing 2 into the upper part of the anti-corrosion layer 102, and insert the slot 301 inside the lower housing 3 into the lower part of the anti-corrosion layer 102, placing the five heating elements 1 between the upper housing 2 and the lower housing 3. Use two sets of locking pin assemblies 4 to... Insert the upper housing 2 and the lower housing 3 into their inner sides. During the insertion process, it is necessary to simultaneously press slide 1 401 and slide 2 403 to compress spring 405. Then, slide 1 401 and slide 2 403 respectively drive locking shaft 1 402 and locking shaft 2 404 to slide into the interior of the upper housing 2 and the lower housing 3. Align the positions and release slide 1 401 and slide 2 403. At this time, spring 405 uses its own elasticity to drive slide 1 401 and slide 2 403 to reset, so that slide 1 401 and slide 2 403 slide to both sides at the same time and lock locking shaft 1 402 into the left side of the interior of the upper housing 2 and the lower housing 3, and lock locking shaft 2 404 into the right side of the interior of the upper housing 2 and the lower housing 3. This limits and fixes the upper housing 2 and the lower housing 3, thus completing the assembly of the PTC heating element. It plays a heat dissipation role through heat dissipation hole 1 202 and heat dissipation hole 2 302.

[0032] 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 plate-type corrosion-resistant PTC heating element, comprising a heating element (1), characterized in that: An insulating layer (101) is fixedly connected to the outer wall of the heating element (1), and an anti-corrosion layer (102) is fixedly connected to the outer wall of the insulating layer (101). The anti-corrosion layer (102) is made of silicone rubber material, which has good high temperature resistance, corrosion resistance and insulation performance, and good flexibility. Electrodes (103) are fixedly connected to both ends of the heating element (1). A connection hole (104) is opened inside the electrode (103). An upper shell (2) is slidably connected to the outer wall of the anti-corrosion layer (102), and a lower shell (3) is slidably connected to the outer wall of the anti-corrosion layer (102). The upper shell (2) is located in the upper part of the anti-corrosion layer (102), and the lower shell (3) is located in the lower part of the anti-corrosion layer (102).

2. The plate-type corrosion-resistant PTC heating element according to claim 1, characterized in that: The upper housing (2) has a slot 1 (201) inside and a heat dissipation hole 1 (202) inside. The anti-corrosion layer (102) is slidably connected inside the slot 1 (201). The lower housing (3) has a slot 2 (301) inside and a heat dissipation hole 2 (302) inside. The anti-corrosion layer (102) is slidably connected inside the slot 2 (301).

3. The plate-type corrosion-resistant PTC heating element according to claim 1, characterized in that: The upper housing (2) is provided with a locking assembly (4), which is located inside the lower housing (3). The locking assembly (4) includes a slider one (401) and a slider two (403), which are slidably connected inside the upper housing (2) and the lower housing (3).

4. The plate-type corrosion-resistant PTC heating element according to claim 3, characterized in that: The outer wall of the slider (401) is fixedly connected to a retaining shaft (402). There are two retaining shafts (402), one of which is slidably connected to the inside of the upper housing (2), and the other is slidably connected to the inside of the lower housing (3).

5. The plate-type corrosion-resistant PTC heating element according to claim 3, characterized in that: The outer wall of the slider two (403) is fixedly connected to the retaining shaft two (404). There are two retaining shaft two (404), one of which is slidably connected to the inside of the upper housing (2), and the other is slidably connected to the inside of the lower housing (3).

6. The plate-type corrosion-resistant PTC heating element according to claim 3, characterized in that: A spring (405) is provided between slider one (401) and slider two (403). One end of the spring (405) is fixedly connected to the inside of slider one (401), and the other end of the spring (405) is fixedly connected to the inside of slider two (403).

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