A new type of automobile rearview mirror defogging and defrosting heating sheet

Abstract

The utility model discloses a novel automobile rear -view mirror anti -fog defrosting heating piece, including insulating layer, temperature control electric heating structure, non temperature control electric heating structure, double -sided adhesive layer, temperature control module and feed terminal. Temperature control electric heating structure and non temperature control electric heating structure staggered meanders, laminated in one side of insulating layer, and through double -sided adhesive layer and rear -view mirror adhesion. Temperature control module and feed terminal rivet pressure in the other side of insulating layer, and temperature control module is connected in series on temperature control electric heating structure. Non temperature control electric heating structure is with low -power sustained heating, to maintain the highest temperature state of mirror. Temperature control electric heating structure is controlled to temperature control module, can start according to temperature automatically. Like this can satisfy the requirement of electric heating heating piece's quick defrosting and the highest temperature must be lower than the safety temperature point. The utility model discloses through the cooperation of double circuit, has solved traditional heating piece energy consumption high, the highest heating temperature is too high, low -temperature section temperature rise too slow's problem, has the advantages of high -efficient defrosting, safe energy -conserving.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a novel anti-fog and defrosting heating element for automotive rearview mirrors. Background Technology

[0002] The main technical approach of existing automotive rearview mirror anti-fog and defrosting heating elements is to achieve temperature control by balancing the electric heating power and dissipation power. To achieve this, two main solutions exist: a metal foil resistor system and a PPTC carbon film resistor system. The former offers high resistance stability, but due to the low temperature coefficient of resistance of the metal foil, the design power of the heating element cannot be too high; otherwise, the maximum temperature of the heating element will be too high, potentially damaging the rearview mirror structure. The latter has a high temperature coefficient of resistance in its heating element, allowing for higher design power, but the material properties limit the energized cycle life of the resistor, as shown in the attached figure. Figure 1 As shown.

[0003] To improve the above problems, some automotive rearview mirror anti-fog and defrosting heating elements incorporate a temperature-sensitive switch in series with the metal foil resistor circuit. This increases the design power of the heating element and allows for temperature limiting in the high-temperature range using the temperature-sensitive switch. However, this solution requires a relatively large control current for the temperature-sensitive switch, and the frequent switching of the temperature switch affects its lifespan. (See attached diagram.) Figure 2 As shown.

[0004] Therefore, there is an urgent need for a new type of automotive rearview mirror anti-fog and defrosting heating element structure to solve the aforementioned technical problems. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the technical problem to be solved by this utility model is to propose a new type of anti-fog and defrosting heating element for automotive rearview mirrors, so as to solve the above-mentioned problems.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model provides a novel anti-fog, defrosting, and heating element for automotive rearview mirrors.

[0008] It includes an insulating layer, on the outward side of which a temperature control module, a first power supply terminal, a second power supply terminal, and a third power supply terminal are riveted. On the inner side of the insulating layer, a temperature-controlled heating structure and a non-temperature-controlled heating structure are laminated.

[0009] The temperature-controlled heating structure and the non-temperature-controlled heating structure are adhered to the rearview mirror via a double-sided adhesive layer:

[0010] One end of the temperature-controlled electric heating structure is connected to the first power supply terminal, and the other end is connected to the third power supply terminal;

[0011] One end of the non-temperature-controlled electric heating structure is connected to the first power supply terminal, and the other end is connected to the second power supply terminal;

[0012] The temperature control module is installed in series on the temperature control heating structure. One end of the temperature control module is connected to the third power supply terminal, and the other end is connected to the second power supply terminal.

[0013] Furthermore, the non-temperature-controlled heating structure is the first heating element.

[0014] Furthermore, the temperature-controlled heating structure is a second heating element.

[0015] Furthermore, the non-temperature-controlled heating structure extends in a serpentine pattern and lies flat on the inner surface of the insulation layer.

[0016] Furthermore, the temperature-controlled heating structure extends in a serpentine pattern and is laid flat on the inner surface of the insulation layer, and the temperature-controlled heating structure is located within the area enclosed by the non-temperature-controlled heating structure.

[0017] Furthermore, the first heating element and the second heating element can be one of the following: resistance wire (metal alloy wire), metal foil or conductive paste heating element;

[0018] Furthermore, the first power supply terminal is connected to a terminal on one side, and the temperature control switch connected to the second and third power supply terminals has a terminal on the other side.

[0019] The beneficial effects of this utility model are as follows:

[0020] A new type of anti-fog and defrosting heating element for automotive rearview mirrors has the following advantages over existing technologies:

[0021] 1. Dual-mode intelligent heating: Through the combined design of temperature-controlled and non-temperature-controlled electric heating structures, it can quickly start defrosting (the non-temperature-controlled electric heating structure and the temperature-controlled electric heating structure heat up at the same time), and can also achieve temperature adaptive adjustment through the temperature control module (the temperature control structure starts and stops according to temperature changes), taking into account both efficiency and energy saving.

[0022] 2. Uniform heating and enhanced safety: The serpentine extension of the temperature-controlled and non-temperature-controlled electric heating structure is laid flat on the inside of the insulation layer, expanding the heating area and avoiding local overheating. At the same time, the double-sided adhesive bonding process enhances structural stability and reduces the risk of short circuits.

[0023] 3. Rapid response and adaptability: In low-temperature conditions, both temperature-controlled and non-temperature-controlled heating structures start immediately after being powered on, quickly melting frost; the temperature-controlled heating structure automatically adjusts its power after reaching the set temperature to prevent overheating and damage to the rearview mirror.

[0024] Compared to the metal foil heating plate solution without temperature control, the improved temperature control solution of this utility model can reduce the lens temperature by 10-20 degrees in the high-temperature range, avoiding damage to the rearview mirror structure due to overheating. At the same time, the power in the low-temperature range can be increased to meet the requirements of rapid heating and defrosting.

[0025] Compared to the conventional temperature control scheme using ordinary series temperature switches, the temperature control switch of this invention has a reduced current, and the presence of a non-temperature-controlled heating structure reduces the number of switching cycles, thereby extending the lifespan of the temperature control switch.

[0026] Compared to the PPTC carbon film heating element solution, this temperature control solution has a comparable low-temperature heating speed and high-temperature limit temperature, but a longer cycle life and does not require the use of precious metal conductive paste, thus reducing costs. Attached Figure Description

[0027] Figure 1 This is a circuit topology diagram of a traditional non-temperature-controlled heating element.

[0028] Figure 2 This is a circuit topology diagram of a traditional temperature-controlled heating element.

[0029] Figure 3 This is an exploded view of the overall structure of this utility model.

[0030] Figure 4 This is the circuit topology diagram of this utility model.

[0031] The attached figures are labeled as follows:

[0032] Temperature control module (1), first power supply terminal (2), second power supply terminal (4), third power supply terminal (3), temperature control heating structure (5), non-temperature control heating structure (6), insulation layer (7), double-sided adhesive layer (8), rearview mirror (9). Detailed Implementation

[0033] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 3 and Figure 4 As shown in this embodiment, a novel anti-fog and defrosting heating element for automotive rearview mirrors includes an insulating layer 7, on the inward side of which a temperature-controlled heating structure 5 and a non-temperature-controlled heating structure 6 are laminated.

[0035] The temperature-controlled electric heating structure 5 and the non-temperature-controlled electric heating structure 6 are adhered to the rearview mirror 9 through a double-sided adhesive layer 8.

[0036] The non-temperature-controlled heating structure 6 is the first heating element, and the temperature-controlled heating structure 5 is the second heating element. The first heating element and the second heating element can be made of the following materials: resistance wire (metal alloy wire), metal foil, conductive paste, etc.

[0037] The insulating layer 7 has a first power supply terminal 2, a second power supply terminal 4, a third power supply terminal 3, and a temperature control module 1 on its outward-facing side. Specifically: one end of the temperature-controlled heating structure 5 is connected to the first power supply terminal 2, and the other end is connected to the third power supply terminal 3; one end of the non-temperature-controlled heating structure 6 is connected to the first power supply terminal 2, and the other end is connected to the second power supply terminal 4; one end of the temperature control module 1 is connected to the third power supply terminal 3, and the other end is connected to the second power supply terminal 4.

[0038] See appendix for details Figure 3 To increase the degree of uniform heating, the non-temperature-controlled heating structure 6 extends in a serpentine shape and is laid flat on the inner surface of the insulation layer 7. Similarly, the temperature-controlled heating structure 5 extends in a serpentine shape and is laid flat on the inner surface of the insulation layer 7. The temperature-controlled heating structure 5 is located within the area enclosed by the non-temperature-controlled heating structure 6. By setting the serpentine-extending temperature-controlled heating structure 5 and the non-temperature-controlled heating structure 6 to be laid flat on the inner side of the insulation layer, the heating area is expanded, and local overheating is avoided. At the same time, the double-sided adhesive bonding process enhances the structural stability and reduces the risk of short circuits.

[0039] The temperature control module 1 is connected between the second power supply terminal 4 and the third power supply terminal 3. The temperature control module 1 is a mechanical temperature control switch with temperature sensing function.

[0040] In practical use, the circuit is first connected and started: after power is applied, current flows simultaneously from the first feed terminal to the temperature-controlled heating structure and the non-temperature-controlled heating structure. The non-temperature-controlled heating structure directly generates heat, providing basic heating capacity; the on / off state of the temperature-controlled heating structure is controlled by the temperature control module based on the temperature signal; during this process, there is a temperature regulation process, specifically in the low-temperature stage: the temperature control module is closed, and both the temperature-controlled and non-temperature-controlled heating structures work simultaneously to quickly increase the temperature of the car rearview mirror; when the temperature reaches the threshold, the temperature control module is disconnected, and only the non-temperature-controlled heating structure continues to work, maintaining the anti-fog effect and saving energy;

[0041] During this period, heat is evenly transferred to the rearview mirror surface through the double-sided adhesive layer, eliminating fog or frost. The serpentine layout of the electric heating structure in this solution ensures that heat covers the entire mirror surface, avoiding blind spots.

[0042] This utility model has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. This utility model is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims of this application are all within the protection scope of this utility model.

Claims

1. A novel anti-fog and defrosting heating element for automotive rearview mirrors, characterized in that: Includes an insulating layer (7), on the outward side of the insulating layer (7) are riveted a temperature control module (1), a first power supply terminal (2), a second power supply terminal (4) and a third power supply terminal (3), and the inner side of the insulating layer (7) is laminated with a temperature-controlled heating structure (5) and a non-temperature-controlled heating structure (6); The temperature-controlled heating structure (5) and the non-temperature-controlled heating structure (6) are adhered to the rearview mirror (9) through a double-sided adhesive layer (8): One end of the temperature-controlled electric heating structure (5) is connected to the first power supply end (2), and the other end is connected to the third power supply end (3); One end of the non-temperature-controlled electric heating structure (6) is connected to the first power supply end (2), and the other end is connected to the second power supply end (4); The temperature control module (1) is connected between the second power supply terminal (4) and the third power supply terminal (3).

2. The novel anti-fog and defrosting heating element for automotive rearview mirrors according to claim 1, characterized in that: The temperature control module (1) is a mechanical temperature control switch with temperature sensing function.

3. The novel anti-fog and defrosting heating element for automotive rearview mirrors according to claim 1, characterized in that: The non-temperature-controlled electric heating structure (6) is the first heating element.

4. The novel anti-fog and defrosting heating element for automotive rearview mirrors according to claim 1, characterized in that: The temperature-controlled electric heating structure (5) is the second heating element.

5. A novel anti-fog and defrosting heating element for automotive rearview mirrors according to any one of claims 1-4, characterized in that: The non-temperature-controlled heating structure (6) extends in a serpentine pattern and lies flat on the inner surface of the insulating layer (7).

6. A novel anti-fog and defrosting heating element for automotive rearview mirrors according to claim 5, characterized in that: The temperature-controlled heating structure (5) extends in a serpentine shape and is laid flat on the inner surface of the insulating layer (7). The temperature-controlled heating structure (5) is located in the area enclosed by the non-temperature-controlled heating structure (6).

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