Assembling structure of heating resistor disc and insulating plate
The assembly structure with alternating convex strips on insulating plates addresses the bulging issue by mimicking an expansion joint, ensuring safety and stability in electric heating plates.
Patent Information
- Application Number
- CN202421063640.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-16
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-16
AI Technical Summary
The thermal expansion mismatch between the heating resistor and insulating plates in electric heating plates causes bulging and separation, leading to potential electrical accidents.
An assembly structure with alternating first and second convex strips on the insulating plates forming protrusions on the heating resistor, mimicking an expansion joint, to accommodate differential thermal expansion.
Prevents bulging and separation of the electric components, enhancing safety by the assembly structure, and the assembly structure effectively prevents the phenomenon of bulging, and has good safety performance.
Smart Images
Figure CN222278721U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heaters, in particular to an assembly structure of a heating resistor sheet and an insulating plate. Background Art
[0002] The electric heating plate of the heater is one of the core components of the heater. It is mainly composed of two layers of insulation plates, upper and lower, and a heating resistor in the middle. The insulation plate is generally made of mica, and the heating resistor is generally made of stainless steel.
[0003] During use, the electric heating plate generates heat. Since the thermal expansion coefficients of the insulating plate and the heating resistor are different, the resistor expands more when heated, while the insulating plate expands less when heated, which easily causes the electric heating plate to "bulge". In severe cases, it will separate into layers, causing the heating resistors to connect together, resulting in electrical accidents. Utility Model Content
[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide an assembly structure of a heating resistor and an insulating plate which can avoid the bulging phenomenon and has good safety performance.
[0005] The utility model solves the technical problem by adopting a technical solution of providing a heating resistor and an insulating plate assembly structure, comprising:
[0006] A first insulating plate, a heating resistor sheet, and a second insulating plate are sequentially arranged, and the first insulating plate and the second insulating plate are both attached to the heating resistor sheet, and a resistance wire is arranged on the heating resistor sheet, wherein:
[0007] A plurality of first convex strips are sequentially arranged at intervals on one side of the upper edge of the first insulating plate close to the heating resistor, and the first convex strips are integrally arranged or separately arranged with the first insulating plate;
[0008] A plurality of second convex strips are sequentially arranged at intervals on one side of the upper edge of the second insulating plate close to the heating resistor, and the second convex strips are arranged integrally or separately with the second insulating plate;
[0009] The plurality of first convex strips abut against the heating resistor sheet, and form a plurality of first protrusions on the heating resistor sheet that protrude toward the second insulating plate side;
[0010] The plurality of second convex strips abut against the heating resistor sheet, and form a plurality of second protrusions on the heating resistor sheet that protrude toward the first insulating plate side.
[0011] Furthermore, there is one second protrusion between two adjacent first protrusions;
[0012] There is one first protrusion between two adjacent second protrusions.
[0013] Furthermore, the cross-sections of the first convex strip and the second convex strip are semicircular or rectangular.
[0014] Furthermore, the heating wire is wound on the heating resistor sheet, and a first heating zone and a second heating zone are formed on the upper part and the lower part of the heating resistor sheet respectively.
[0015] Furthermore, the first heating zone and the second heating zone each have a plurality of the first protrusions and a plurality of the second protrusions.
[0016] Furthermore, the first protrusion and the second protrusion of the first heating zone are symmetrically arranged with the first protrusion and the second protrusion of the second heating zone.
[0017] Furthermore, the resistance wires in the first heating zone and the second heating zone each include a plurality of upper winding sections and lower winding sections which are arranged at intervals and connected end to end;
[0018] The first protrusion and the second protrusion are perpendicular to the upper winding section and the lower winding section.
[0019] Furthermore, both ends of the resistance wire have connection terminals for connecting to a power source.
[0020] Furthermore, the first insulating plate and the second insulating plate are made of mica, and the heating resistor is made of stainless steel.
[0021] Compared with the prior art, the utility model has at least the following beneficial effects:
[0022] In the utility model, a plurality of first convex strips are provided on the first insulating plate, and a plurality of second convex strips are provided on the second insulating plate. The plurality of first convex strips and the plurality of second convex strips are respectively against the two sides of the heating resistor, so that a plurality of first protrusions protruding toward the second insulating plate side and a plurality of second protrusions protruding toward the first insulating plate side are respectively formed on the heating resistor. The first protrusions and the second protrusions formed on the heating resistor are arranged alternately, which is similar to an expansion joint structure. During the heating process, since the expansion coefficients of the first insulating plate and the second insulating plate are different from those of the heating resistor, the expansion of the heating resistor is larger, while the expansion of the first insulating plate and the second insulating plate is smaller, which will generate stress. The expansion joint structure formed by the first protrusion and the second protrusion can release the stress generated by the expansion, effectively prevent the occurrence of bulging, and has good safety performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a plan view of the heating resistor of the utility model;
[0024] Figure 2 It is a schematic diagram of the arrangement of the heating resistor, the first convex strip and the second convex strip;
[0025] Figure 3 It is a schematic diagram of the exploded view of the heating resistor, the first insulating plate and the second insulating plate.
[0026] In the figure:
[0027] 1. first insulating plate; 10. first convex strip;
[0028] 2. Heating resistor; 21. First protrusion; 22. Second protrusion; 23. First heating zone; 24. Second heating zone; 25. Resistance wire; 250. Terminal block; 251. Upper winding section; 252. Lower winding section; 3. Second insulating plate; 30. Second convex strip. DETAILED DESCRIPTION
[0029] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0030] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0031] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0032] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0033] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0034] like Figure 1-Figure 3 As shown, a heating resistor and insulating plate assembly structure is used for an electric heating plate of a heater, which mainly includes: a heating resistor 2, a first insulating plate 1 and a second insulating plate 3.
[0035] The first insulating plate 1, the heating resistor 2 and the second insulating plate 3 are arranged in sequence, and the first insulating plate 1 and the second insulating plate 3 are both attached to the heating resistor 2, and the heating resistor 2 is provided with a resistance wire 25. Preferably, both ends of the resistance wire 25 have connection terminals 250 for connecting to a power source. When powered on, current passes through the resistance wire 25, and the resistance wire 25 generates heat. Among them, the first insulating plate 1 and the second insulating plate 3 are made of mica, and the heating resistor 2 is made of stainless steel. The thermal expansion coefficient of the mica material is different from that of the stainless steel. When heated, the expansion of the stainless steel material is greater than that of the mica material.
[0036] Specifically, a plurality of first convex strips 10 are sequentially arranged at intervals on the side of the upper edge of the first insulating plate 1 close to the heating resistor 2, and the first convex strips 10 are integrally arranged or separately arranged with the first insulating plate 1. When the integral arrangement is made, the overall structure is simpler, and when the separate arrangement is made, the manufacturing is relatively simple, and the first convex strips 10 can be made of insulating paper. A plurality of second convex strips 30 are sequentially arranged at intervals on the side of the upper edge of the second insulating plate 3 close to the heating resistor 2, and the second convex strips 30 are integrally arranged or separately arranged with the second insulating plate 3. Similarly, when the integral arrangement is made, the overall structure is simpler, and when the separate arrangement is made, the manufacturing is relatively simple, and the second convex strips 30 can also be made of insulating paper. The first convex strips 10 and the second convex strips 30 are respectively located on both sides of the heating resistor 2. A plurality of first convex strips 10 abut against the heating resistor 2, and form a plurality of first protrusions 21 protruding toward the second insulating plate 3 on the heating resistor 2; a plurality of second convex strips 30 abut against the heating resistor 2, and form a plurality of second protrusions 22 protruding toward the first insulating plate 1 on the heating resistor 2. That is, on the heating resistor 2, the protruding directions of the first protrusion 21 and the second protrusion 22 are opposite, and the first protrusion 21 and the second protrusion 22 are also arranged in strips, forming a structure similar to an expansion joint, so as to release the stress during heating expansion.
[0037] In actual use, the first insulating plate 1 of this embodiment is provided with a plurality of first convex strips 10, and the second insulating plate 3 is provided with a plurality of second convex strips 30. The plurality of first convex strips 10 and the plurality of second convex strips 30 are respectively against the two sides of the heating resistor 2, so that the heating resistor 2 is respectively formed with a plurality of first protrusions 21 protruding toward the second insulating plate 3 and a plurality of second protrusions 22 protruding toward the first insulating plate 1. The first protrusions 21 and the second protrusions 22 formed on the heating resistor 2 are arranged alternately, which is similar to an expansion joint structure. During the heating process, due to the different expansion coefficients of the first insulating plate 1 and the second insulating plate 3 and the heating resistor 2, the expansion of the heating resistor 2 is relatively large, while the expansion of the first insulating plate 1 and the second insulating plate 3 is relatively small, which will generate stress. The expansion joint structure formed by the first protrusions 21 and the second protrusions 22 can release the stress generated by the expansion, effectively prevent the occurrence of bulging, and has good safety performance.
[0038] More specifically, in this embodiment, there is a second protrusion 22 between two adjacent first protrusions 21; there is a first protrusion 21 between two adjacent second protrusions 22. The first protrusions 21 and the second protrusions 22 are arranged alternately. The cross-sections of the first protrusions 10 and the second protrusions 30 are semicircular or rectangular.
[0039] Optionally, the heating wire of this embodiment is wound on the heating resistor 2, and a first heating zone 23 and a second heating zone 24 are formed at the upper and lower parts of the heating resistor 2, respectively. The heating wires of the first heating zone 23 and the second heating zone 24 are both wound in a serpentine shape to ensure a good heating effect. Among them, the resistance wires 25 of the first heating zone 23 and the second heating zone 24 both include a plurality of upper winding sections and lower winding sections that are arranged at intervals and connected end to end, and the upper winding sections and the lower winding sections 252 are arranged alternately to cover the heating resistor 2. In addition, the first heating zone 23 and the second heating zone 24 both have a plurality of first protrusions 21 and a plurality of second protrusions 22, and the first protrusions 21 and the second protrusions 22 of the first heating zone 23 are symmetrically arranged with the first protrusions 21 and the second protrusions 22 of the second heating zone 24, which can ensure that the stress generated in the upper and lower parts of the heating resistor 2 is balanced after heating. The first protrusion 21 and the second protrusion 22 are both perpendicular to the upper winding section 251 and the lower winding section 252 .
[0040] In this solution, the assembly structure of the heating resistor and the insulating plate can effectively avoid the phenomenon of bulging due to the different expansion of the heating resistor 2 and the insulating plate after being heated, and has good safety performance.
Claims
1. A heating resistor and insulating plate assembly structure, characterized in that: include: A first insulating plate, a heating resistor sheet, and a second insulating plate are sequentially arranged, and the first insulating plate and the second insulating plate are both attached to the heating resistor sheet, and a resistance wire is arranged on the heating resistor sheet, wherein: A plurality of first convex strips are sequentially arranged at intervals on one side of the upper edge of the first insulating plate close to the heating resistor, and the first convex strips are integrally arranged or separately arranged with the first insulating plate; A plurality of second convex strips are sequentially arranged at intervals on one side of the upper edge of the second insulating plate close to the heating resistor, and the second convex strips are arranged integrally or separately with the second insulating plate; The plurality of first convex strips abut against the heating resistor sheet, and form a plurality of first protrusions on the heating resistor sheet that protrude toward the second insulating plate side; The plurality of second convex strips abut against the heating resistor sheet, and form a plurality of second protrusions on the heating resistor sheet that protrude toward the first insulating plate side.
2. The assembly structure of the heating resistor and the insulating plate according to claim 1, characterized in that: There is one second protrusion between two adjacent first protrusions; There is one first protrusion between two adjacent second protrusions.
3. The heating resistor and insulating plate assembly structure according to claim 1 or 2, characterized in that: The cross sections of the first convex strip and the second convex strip are semicircular or rectangular.
4. The assembly structure of the heating resistor and the insulating plate according to claim 1, characterized in that: The resistance wire is wound on the heating resistor sheet, and a first heating zone and a second heating zone are formed on the upper part and the lower part of the heating resistor sheet respectively.
5. The assembly structure of the heating resistor and the insulating plate according to claim 4, characterized in that: The first heating zone and the second heating zone each have a plurality of the first protrusions and a plurality of the second protrusions.
6. The assembly structure of the heating resistor and the insulating plate according to claim 5, characterized in that: The first protrusion and the second protrusion of the first heating zone are symmetrically arranged with the first protrusion and the second protrusion of the second heating zone.
7. The assembly structure of the heating resistor and the insulating plate according to any one of claims 4 to 6, characterized in that: The resistance wires in the first heating zone and the second heating zone both include a plurality of upper winding sections and lower winding sections which are arranged at intervals and connected end to end; The first protrusion and the second protrusion are perpendicular to the upper winding section and the lower winding section.
8. The assembly structure of the heating resistor and the insulating plate according to claim 1, characterized in that: Both ends of the resistance wire are provided with connection terminals for connecting to a power source.
9. The assembly structure of the heating resistor and the insulating plate according to claim 1, characterized in that: The first insulating plate and the second insulating plate are made of mica, and the heating resistor is made of stainless steel.