Sensor wire for electric hair drier

Abstract

The utility model discloses a sensor lead for an electric hair drier, which comprises a core wire and an insulating layer wrapped outside the core wire, an elastic buffer layer is arranged between the core wire and the insulating layer, and at least one side surface of the elastic buffer layer is provided with a plurality of convex points. The inner side surface of the elastic buffer layer of the wire is provided with a plurality of convex points, gaps exist between other areas, without the convex points, of the inner side surface and the outer side surface of the core wire, and when each layer of the wire is heated and expanded, even if the expansion degree of the core wire is higher than that of an insulating layer, the elastic buffer layer has elasticity, and gaps exist between the elastic buffer layer and the core wire, so that an avoiding space exists; the expansion part of the core wire can be accommodated, and the outer insulating layer is prevented from being extruded and cracked. Similarly, for example, the expansion degree of the insulating layer is higher than that of the core wire, the inner side of the insulating layer expands and extrudes inwards to enable the elastic buffer layer to deform, and the gap can accommodate the deformation part of the elastic buffer layer, so that the extrusion of the expansion part on the inner side of the insulating layer to the core wire is greatly reduced, and the influence on the wire performance due to excessive extrusion of the core wire can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of wires, in particular to a sensor wire for a hair dryer. Background Art

[0002] The hair dryer includes a motor, a fan blade and a heating wire. The motor drives the fan blade to rotate to generate a flowing airflow. The heating wire heats the flowing airflow, and the heated flowing airflow is blown out from the air outlet of the hair dryer to form hot air. In order to achieve good temperature control and avoid scalding users, many hair dryers are equipped with temperature sensors to detect the temperature of the airflow. If the temperature is detected to be too high, the heating power of the heating wire is reduced to reduce the temperature of the airflow. When the hair dryer blows hot air, its internal temperature will be very high. The existing temperature sensor wire is usually wrapped with multiple layers of different materials. The materials of the inner and outer layers are different, so the thermal expansion coefficients are different, and the degree of thermal expansion is different, which may cause cracks on the surface of the wire or excessive extrusion of the core wire, affecting the performance of the wire. Summary of the invention

[0003] The utility model aims to provide a sensor wire for a hair dryer, which can prevent the wire surface from bursting or excessive extrusion of the core wire.

[0004] In order to achieve the above purpose, the utility model provides a sensor wire for a hair dryer, including a core wire and an insulating layer wrapped around the outside of the core wire, an elastic buffer layer is provided between the core wire and the insulating layer, and a plurality of protrusions are raised on at least one side of the elastic buffer layer.

[0005] Furthermore, a heat insulation layer is provided between the insulating layer and the elastic buffer layer.

[0006] Furthermore, the heat insulation layer is made of polycrystalline alumina fiber felt.

[0007] Furthermore, the outer side of the insulation layer is wrapped with a fire-resistant layer.

[0008] Furthermore, the fire-resistant layer is made of flame-retardant polyvinyl chloride.

[0009] Furthermore, a heat-resistant elastic protective layer is wrapped outside the fire-resistant layer, and a plurality of grooves are opened on the surface of the heat-resistant elastic protective layer along the axial direction of the conductor, and the grooves are distributed circumferentially at intervals on the surface of the heat-resistant elastic protective layer.

[0010] Furthermore, the heat-resistant elastic protective layer is made of high-temperature resistant silicone.

[0011] Furthermore, the elastic buffer layer is made of rubber.

[0012] The conductor provided by the utility model has a plurality of protrusions on at least one side of its elastic buffer layer, for example, a plurality of protrusions on its inner side, so that the inner side of the elastic buffer layer contacts the core wire through the protrusions, and there is a gap between the other areas of the inner side of the elastic buffer layer without protrusions and the outer side of the core wire. When the layers of the conductor expand due to heat, even if the expansion degree of the core wire is higher than that of the insulating layer, since the elastic buffer layer itself has elasticity and there is a gap between it and the core wire, that is, there is an escape space, which can accommodate the expanded part of the core wire and avoid squeezing and cracking the outer insulating layer. Similarly, for example, if the expansion degree of the insulating layer is higher than that of the core wire, the inner side of the insulating layer expands and squeezes inwards, since the elastic buffer layer itself has elasticity and there is a gap between it and the core wire, the expanded part of the inner side of the insulating layer squeezes inwards to deform the elastic buffer layer, and the gap can accommodate the deformed part of the elastic buffer layer, thereby greatly reducing the squeezing of the core wire by the expanded part of the inner side of the insulating layer, and avoiding affecting the conductor performance due to excessive squeezing of the core wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the cross-section of the sensor wire for a hair dryer. DETAILED DESCRIPTION

[0014] The present invention is further described in detail below in conjunction with specific implementation methods.

[0015] like Figure 1 As shown, the sensor wire for the hair dryer includes a core wire 1, an elastic buffer layer 2, a heat insulation layer 3, an insulating layer 4, a fire-resistant layer 5 and a heat-resistant elastic protective layer 6 which are sequentially distributed from the inside to the outside. The heat-resistant elastic protective layer 6 is made of high-temperature resistant silicone, and its heat-resistant temperature can reach 250-300°C. When the hair dryer blows hot air, its internal environment temperature is usually lower than 250°C. The outer layer of the sensor wire is made of high-temperature resistant silicone protective layer 6, which can prevent the sensor wire shell from heating due to excessive internal temperature when the hair dryer blows hot air. The fire-resistant layer 5 is made of flame-retardant polyvinyl chloride, which can prevent the sensor wire from burning due to spontaneous combustion of other parts of the hair dryer, and can prevent the sensor wire from spontaneous combustion due to excessive temperature. The heat insulation layer 3 is made of polycrystalline alumina fiber felt, which can effectively isolate the high temperature of the internal environment of the hair dryer when the hair dryer blows hot air, so that the temperature of the core wire 1 remains stable, ensuring that the transmission performance of the core wire is not affected by the high temperature of the internal environment of the hair dryer. The elastic buffer layer 2 is made of rubber, which has insulating properties. The elastic buffer layer 2 can also serve as a second insulating layer. Figure 1As shown, there are a plurality of protrusions 21 protruding from the inner side of the elastic buffer layer 2. The elastic buffer layer 2 contacts the core wire 1 through the protrusions 21, and there is a gap between the other areas of the inner side of the elastic buffer layer 2 without the protrusions 21 and the outer side of the core wire 1. When the layers of the conductor expand due to heat, even if the core wire 1 expands more than the heat insulation layer 3, the insulating layer 4, the fire-resistant layer 5 and the heat-resistant elastic protective layer 6 located on the outer layer, since the elastic buffer layer 2 itself is elastic and there is a gap between it and the core wire 1, there is an escape space, which can accommodate the expanded part of the core wire 1 and avoid squeezing and cracking the heat insulation layer 3, the insulating layer 4, the fire-resistant layer 5 and the heat-resistant elastic protective layer 6 located on the outer layer. Similarly, for example, the heat insulating layer 3, the insulating layer 4, the fire resistant layer 5 or the heat resistant elastic protective layer 6 located on the outer layer expands to a higher degree than the core wire 1. The inner side of the heat insulating layer 3, the insulating layer 4, the fire resistant layer 5 or the heat resistant elastic protective layer 6 expands and squeezes inwards, and the expanded inner side of each layer squeezes inwards to deform the elastic buffer layer 2. Since there is a gap between the elastic buffer layer 2 and the core wire, the gap can accommodate the deformed part of the elastic buffer layer 2, thereby greatly reducing the squeezing of the core wire 1 by the expanded inner side of each layer, and avoiding the influence of the conductor performance due to excessive squeezing of the core wire 1. In other embodiments, the elastic buffer layer 2 can be changed to have multiple protrusions 21 on the outer side, or multiple protrusions 21 on both the inner and outer sides.

[0016] Due to the limited space inside the hair dryer, when routing the sensor wires, they may need to be bent to avoid other components. The internal environment of the hair dryer often generates high temperatures due to the hot air. If the wires remain bent for a long time, they are prone to bursting in a high temperature environment. Figure 1 As shown, the surface of the heat-resistant elastic protective layer 6 of this embodiment is provided with a plurality of grooves 61 along the axial direction of the wire, and each groove 61 is circumferentially spaced on the surface of the heat-resistant elastic protective layer 6. The heat-resistant elastic protective layer 6 itself is elastic, and when the sensor wire is bent, the groove 61 can be deformed and expanded. Compared with the existing wire with a flat outer surface, the sensor wire of this embodiment can buffer and reduce the pulling force generated on the wire surface through the groove 61, thereby reducing the incidence of the wire bursting due to being bent for a long time in a high temperature environment.

[0017] The above is only an implementation method of the invention, and does not limit the scope of patent protection. Those skilled in the art can make non-substantial changes or substitutions based on the invention, which still fall within the scope of patent protection.

Claims

1. A sensor wire for a hair dryer, comprising a core wire (1) and an insulating layer (4) wrapped around the outside of the core wire (1), characterized in that: An elastic buffer layer (2) is provided between the core wire (1) and the insulating layer (4), and a plurality of protrusions (21) are protruded on at least one side surface of the elastic buffer layer (2).

2. The sensor wire for hair dryer as claimed in claim 1, characterized in that: A heat insulation layer (3) is provided between the insulating layer (4) and the elastic buffer layer (2).

3. The sensor wire for hair dryer as claimed in claim 2, characterized in that: The heat insulation layer (3) is made of polycrystalline alumina fiber felt.

4. The sensor wire for hair dryer according to claim 1 or 2, characterized in that: The outer side of the insulating layer (4) is wrapped with a fire-resistant layer (5).

5. The sensor wire for hair dryer as claimed in claim 4, characterized in that: The fire-resistant layer (5) is made of flame-retardant polyvinyl chloride.

6. The sensor wire for hair dryer as claimed in claim 5, characterized in that: The outer side of the fire-resistant layer (5) is wrapped with a heat-resistant elastic protective layer (6), and the surface of the heat-resistant elastic protective layer (6) is provided with a plurality of grooves (61) along the axial direction of the conductor, and the grooves (61) are distributed at intervals in the circumferential direction on the surface of the heat-resistant elastic protective layer (6).

7. The sensor wire for hair dryer as claimed in claim 6, characterized in that: The heat-resistant elastic protective layer (6) is made of high-temperature-resistant silicone.

8. The sensor wire for hair dryer according to claim 1, characterized in that: The elastic buffer layer (2) is made of rubber.

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