Integrally-formed electrode heater

Abstract

The utility model provides an integrally formed electrode heater, comprising at least one heating unit, the heating unit comprises an insulation shell and a heating core body arranged in the insulation shell, the heating core body comprises a positive plate, a negative plate and an electric heating element connected with the positive plate and the negative plate, wherein each of the positive plate and the negative plate comprises a main plate body and a leading-out end which is positioned at one end of the main plate body and is integrally formed with the main plate body, the leading-out end extends to the outside of the insulating shell, and the leading-out end comprises a first plate body part and a second plate body part which are integrally formed and are arranged at an included angle of 90 degrees. According to the utility model, the anti-deformation strength and the anti-tearing capability of the leading-out end are stronger, and the turning part is free of welding points due to the integrally formed structure, so that the overcurrent capability of the product can be effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of electric heaters, and particularly relates to an integrally formed electrode heater. Background Art

[0002] The heating element used as a heat source in a heater is an important heating component. The heating element has various shapes, such as rod-shaped, flat-plate-shaped, thin-plate-shaped, etc. Among them, the flat-plate-shaped heating element and the thin-plate-shaped heating element are collectively referred to as the heating element.

[0003] In existing heaters, the lead-out ends of the electrode plates of the heating element are mostly of the structure of straight-face plates, which causes problems such as limited power connection directions and weak lead-out end strength. Summary of the Utility Model

[0004] In order to solve the technical problems existing in the background art, the utility model provides an integrally formed electrode heater.

[0005] An integrally formed electrode heater provided by the utility model includes: at least one heating element, the heating element includes an insulating shell and a heating core body arranged inside the insulating shell. The heating core body includes a positive electrode plate, a negative electrode plate, and a heating element connecting the positive electrode plate and the negative electrode plate. Among them:

[0006] Both the positive electrode plate and the negative electrode plate include a main plate body and a lead-out end located at one end of the main plate body and integrally formed with the main plate body. The lead-out end extends to the outside of the insulating shell. The lead-out end includes a first plate body part and a second plate body part that are integrally formed and arranged at a 90° angle.

[0007] Preferably, the first plate body part is connected to the main plate body, and the second plate body part is located on the side of the first plate body part.

[0008] Preferably, a third plate body part integrally formed with the second plate body part is further provided on the outer side of the second plate body part, and the third plate body part is opposite to the second plate body part and a spacing groove is formed between the two.

[0009] Preferably, the heating core body further includes a plastic-encapsulated part. The plastic-encapsulated part is of a frame structure, and its inner side is partitioned to form a plurality of sequentially arranged frame openings; the positive electrode plate and the negative electrode plate are respectively fixed on the front and back of the frame and cover the front and back of the frame; there are multiple groups of heating elements, and each group has at least one; each group of heating elements is sequentially fixed in each frame opening and is respectively connected to the positive electrode plate and the negative electrode plate.

[0010] Preferably, a plurality of notch grooves are provided on the peripheral wall of the positive electrode plate, a plurality of installation areas are arranged at intervals on the positive electrode plate, and through holes are provided between every two adjacent installation areas on the positive electrode plate; the heating elements are respectively fixedly installed in each installation area; the plastic-encapsulated part is injection-molded on the positive electrode plate and forms a coating on the periphery of each installation area for the heating elements, and the negative electrode plate is sequentially connected to each heating element.

[0011] Preferably, an outer shell made of a heat-conducting metal is provided outside the insulating shell, and the side of the outer shell has an inner convex structure that protrudes inward to form an extrusion on the insulating shell.

[0012] Preferably, the inner convex structure is formed by the inward extrusion of the side wall of the outer shell.

[0013] Preferably, the material of the outer shell is aluminum.

[0014] In the present utility model, by setting the lead-out ends of the positive electrode sheet and the negative electrode sheet into a structure of a first sheet body part and a second sheet body part that are integrally formed and arranged at a 90° angle, this structural design can change the access direction of the power connection sheet, and make the anti-deformation strength and anti-tearing ability of the lead-out end stronger. Moreover, the integrally formed structure makes there be no welding points at the turning part, which can effectively ensure the over-current capacity of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. is a schematic structural diagram of the heating unit in an integrally formed electrode heater proposed by the present utility model;

[0016] Figure 2 FIG. is an exploded view of the heating unit in an integrally formed electrode heater proposed by the present utility model;

[0017] Figure 3 FIG. is an exploded view of the heating core in an integrally formed electrode heater proposed by the present utility model;

[0018] Figure 4 FIG. is a partial structural schematic diagram of the positive electrode sheet or the negative electrode sheet in an integrally formed electrode heater proposed by the present utility model;

[0019] Figure 5 FIG. is a schematic diagram of the connection method between an integrally formed electrode heater and a power connection sheet proposed by the present utility model;

[0020] Figure 6 FIG. is a schematic diagram of the structural relationship between the positive electrode sheet and the plastic-encapsulated part in an integrally formed electrode heater proposed by the present utility model;

[0021] Figure 7 FIG. is a schematic diagram of the inner convex structure of the outer shell in an integrally formed electrode heater proposed by the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Refer to Figure 1-4, an integrated electrode heater proposed by the present utility model includes: at least one heating unit, where the heating unit includes an insulating shell 1 and a heating core body 2 disposed within the insulating shell 1. The heating core body 2 includes a positive electrode sheet 22, a negative electrode sheet 23, and a heating element 21 connecting the positive electrode sheet 22 and the negative electrode sheet 23, where:

[0023] Both the positive electrode sheet 22 and the negative electrode sheet 23 include a main sheet body a1 and a lead-out end a2 located at one end of the main sheet body a1 and integrally formed with the main sheet body a1. The lead-out end a2 extends to the outside of the insulating shell 1. The lead-out end a2 includes a first sheet body portion a21 and a second sheet body portion a22 that are integrally formed and arranged at a 90° angle. This structural design can change the access direction of the power connection sheet, and make the lead-out end a2 have stronger anti-deformation strength and anti-tearing ability. Moreover, the integrally formed structure makes there be no welding points at the turning point, which can effectively ensure the over-current capacity of the product.

[0024] Further, in this embodiment, the first sheet body portion a21 is connected to the main sheet body a1, and the second sheet body portion a22 is located at the side of the first sheet body portion a21. This structural design does not additionally increase the overall height of the heating unit.

[0025] Further, in this embodiment, a third sheet body portion a23 integrally formed with the second sheet body portion a22 is further provided on the outer side of the second sheet body portion a22, and the third sheet body portion a23 is opposite to the second sheet body portion a22 and a spacing groove is formed between the two.

[0026] Refer to Figure 5 , when connecting the power, the power connection sheet is clamped into the spacing groove and fixed to the third sheet body portion a23 and the second sheet body portion a22 by means of hot melting. This clamping method can not only further increase the connection firmness, but also form positioning with the lead-out end a2 to ensure the consistency of the welding height of each heating element with the lead-out end a2 when multiple heating elements are connected.

[0027] In addition, in this embodiment, the heating core body 2 further includes a plastic-encapsulated part 24. The plastic-encapsulated part 24 is of a frame structure, and several sequentially arranged frame openings are formed by partitioning on the inner side thereof; the positive electrode sheet 22 and the negative electrode sheet 23 are respectively fixed on the front and back of the frame and cover the front and back thereof; there are multiple groups of heating elements 21, and each group has at least one; each group of heating elements 21 is sequentially fixed in each frame opening and respectively connected to the positive electrode sheet 22 and the negative electrode sheet 23. By wrapping the positive electrode sheet 22, the negative electrode sheet 23 and the heating elements 21 together with the plastic-encapsulated part 24 to form an integral body, this structural design can effectively improve the structural strength of the heating core body 2.

[0028] Refer to Figure 6, Further, a plurality of notch grooves are provided on the peripheral wall of the positive electrode sheet 22, a plurality of mounting areas 22b are sequentially arranged at intervals on the positive electrode sheet 22, and through holes are provided between every two adjacent mounting areas 22b on the positive electrode sheet 22; the heating elements 21 are respectively fixedly installed in each mounting area 22b; the plastic encapsulation 24 is injection-molded on the positive electrode sheet 22 and forms a coating on the outer periphery of each mounting area 22b for the heating elements 21, and the negative electrode sheet 23 is sequentially connected to each heating element 21. In this way, the heating elements 21 can be tightly wrapped inside, making them firmly fit together with the positive electrode sheet 22, and the problem of loosening of the heating elements 21 can be avoided.

[0029] In addition, in this embodiment, a housing 3 made of a heat-conducting metal such as aluminum is further provided outside the insulating case 1 to increase the strength of the heating unit itself.

[0030] Refer to Figure 7 , the side of the housing 3 has an inward convex structure 31 that protrudes inward to squeeze the insulating case 1, so as to increase the tightness of the combination of the housing 3 and its internal components. Specifically: the inward convex structure 31 is formed by squeezing the side wall of the housing 3 inward.

[0031] As can be seen from the above, in the present utility model, the lead-out ends a2 of the positive electrode sheet 22 and the negative electrode sheet 23 are set to have a structure of a first sheet body portion a21 and a second sheet body portion a22 that are integrally formed and arranged at a 90° angle. This structural design can change the access direction of the power connection sheet, and make the lead-out end a2 have stronger anti-deformation strength and anti-tearing ability. Moreover, the integrally formed structure makes there be no welding point at the turning position, which can effectively ensure the over-current capacity of the product.

[0032] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. An integrally formed electrode heater, characterized in that, Comprising: At least one heating unit, the heating unit includes an insulating shell (1) and a heating core (2) disposed within the insulating shell (1), the heating core (2) includes a positive electrode sheet (22), a negative electrode sheet (23), and a heating element (21) connecting the positive electrode sheet (22) and the negative electrode sheet (23), wherein: Both the positive electrode sheet (22) and the negative electrode sheet (23) include a main sheet body (a1) and a lead-out end (a2) located at one end of the main sheet body (a1) and integrally formed with the main sheet body (a1), the lead-out end (a2) extends to the outside of the insulating shell (1), and the lead-out end (a2) includes a first sheet body portion (a21) and a second sheet body portion (a22) that are integrally formed and disposed at a 90° angle.

2. The integrally formed electrode heater according to claim 1, wherein The first sheet body portion (a21) is connected to the main sheet body (a1), and the second sheet body portion (a22) is located on the side of the first sheet body portion (a21).

3. The one-piece molded electrode heater according to claim 2, characterized in that, A third sheet body portion (a23) integrally formed with the second sheet body portion (a22) is further provided on the outer side of the second sheet body portion (a22), and the third sheet body portion (a23) is opposite to the second sheet body portion (a22) and a spacing groove is formed therebetween.

4. The one-piece molded electrode heater according to claim 1, wherein, The heating core (2) further includes a plastic-encapsulated part (24), the plastic-encapsulated part (24) is a frame structure, and its inner side is partitioned to form a plurality of sequentially arranged frame openings; the positive electrode sheet (22) and the negative electrode sheet (23) are respectively fixed to the front and back of the frame and cover the front and back thereof; there are multiple groups of heating elements (21), at least one in each group; each group of heating elements (21) is sequentially fixed in each frame opening and is respectively connected to the positive electrode sheet (22) and the negative electrode sheet (23).

5. The integrally formed electrode heater according to claim 4, characterized in that, A plurality of notch grooves are provided on the peripheral wall of the positive electrode sheet (22), a plurality of mounting areas (22b) are sequentially spaced on the positive electrode sheet (22), and through holes are provided between each adjacent two mounting areas (22b) on the positive electrode sheet (22); the heating elements (21) are respectively fixedly installed in each mounting area (22b); the plastic-encapsulated part (24) is injection-molded on the positive electrode sheet (22) and forms a coating on the periphery of each mounting area (22b) for the heating elements (21), and the negative electrode sheet (23) is connected to each heating element (21) in sequence.

6. The one-piece formed electrode heater according to any one of claims 1-5, characterized in that, An outer shell (3) made of heat-conducting metal is provided outside the insulating shell (1), and the side of the outer shell (3) has an inner convex structure (31) that protrudes inward to form an extrusion on the insulating shell (1).

7. The one-piece molded electrode heater according to claim 6, characterized in that, The inner convex structure (31) is formed by inward extrusion of the side wall of the outer shell (3).

8. The one-piece formed electrode heater according to claim 6, characterized in that, The material of the outer shell (3) is aluminum.

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