A same-side energization profile PTC sheet structure

Abstract

The utility model discloses a same side power supply special-shaped PTC piece structure in the field of PTC, including PTC heating element and electrode sheet, the first surface of PTC heating element is equipped with two interval arrangement's low electrode part, two electrode sheets are arranged respectively on two low electrode parts, two low electrode parts are arranged in parallel, the surface of low electrode part is lower than the first surface. The PTC piece structure provided by the utility model, by setting two low electrode parts on the first surface of PTC heating element, realize the unilateral power supply of PTC heating element, simple structure, reduce the heat dissipation thermal resistance, the surface of low electrode part is lower than the first surface, by setting such step structure, make the creepage distance between positive and negative two electrode sheets increase, improve the security when using PTC heating element.

Description

Technical Field

[0001] This utility model relates to the field of PTC, and in particular to a PTC chip structure with irregular shape and same-side power supply. Background Technology

[0002] PTC heaters utilize the constant-temperature heating function of PTC thermistor ceramics. The PTC ceramic sheet is attached to the part to be heated, or combined with a heat dissipation structure to form the heater. They are widely used in electric mosquito coils, electric perfume holders, air conditioning auxiliary heating, and automotive thermal management systems, and have a large market size.

[0003] Currently, all PTC ceramics on the market are double-sided, meaning that the voltage is applied to both ends of the PTC ceramic sheet, and the leads must be brought out from both ends, making the structure relatively complex. Utility Model Content

[0004] The purpose of this invention is to provide a PTC sheet structure with irregular shape and same-side power supply. The electrode sheet is installed by setting two low-position electrode parts on one surface of the PTC heating element. The structure is simple and reduces heat dissipation thermal resistance.

[0005] To solve the above technical problems, the following technical solution is adopted: This utility model provides a PTC sheet structure with irregular shape and same-side power supply, including a PTC heating element and an electrode sheet. The first surface of the PTC heating element is provided with two spaced-apart low-position electrode portions. The two electrode sheets are respectively disposed on the two low-position electrode portions. The two low-position electrode portions are arranged in parallel, and the surface of the low-position electrode portion is lower than the first surface.

[0006] Optionally, the first surface is further provided with a high step, which is located between the two low-position electrode portions.

[0007] Optionally, the PTC heating element has a cuboid structure, the low-position electrode portion has a rectangular structure, and the shape of the electrode sheet is adapted to the regional shape of the low-position electrode portion.

[0008] Optionally, the length of the low-position electrode portion is the same as that of the PTC heating element, and one end of the low-position electrode portion extends to the first side of the PTC heating element.

[0009] Optionally, the wires on the positive electrode plate and the negative electrode plate on the low-position electrode section are led out from the first side and connected to the device.

[0010] Optionally, a high step higher than the low electrode portion is formed between the two low electrode portions on the first side.

[0011] Optionally, the distance between the two lower electrode portions is not less than 2 mm.

[0012] Optionally, it also includes an aluminum tube, in which the PTC heating element is mounted.

[0013] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: The PTC sheet structure provided by this utility model achieves unilateral energization of the PTC heating element by setting both low-position electrode portions on the first surface of the PTC heating element. The structure is simple and reduces heat dissipation thermal resistance. The surface of the low-position electrode portion is lower than the first surface. By setting such a stepped structure, the creepage distance between the positive and negative electrode sheets is increased, thereby improving the safety of the PTC heating element during use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the PTC chip in an embodiment of this utility model; Figure 2 This is a schematic diagram of the first surface structure of the PTC heating element in an embodiment of this utility model; Figure 3 This is a schematic diagram of the first side structure of the PTC heating element in an embodiment of this utility model.

[0015] Explanation of reference numerals in the attached figures: 1. Aluminum tube; 2. Electrode sheet; 3. PTC heating element; 31. High step; 32. Low electrode section; 4. Wire. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use.

[0017] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] Example 1

[0019] like Figure 1 , Figure 2 As shown, this embodiment provides a PTC sheet structure with a non-circuited, same-side power supply, including a PTC heating element 3 and electrode sheets 2. The PTC heating element 3 used in this embodiment has a cuboid structure with a rectangular surface. Two low-position electrode portions 32 are provided on the first surface of the PTC heating element 3, spaced apart and parallel to each other. The distance between the two low-position electrode portions is not less than 2 mm, and the width of the PTC heating element is not less than 15 mm. The low-position electrode portions 32 are close to the edge of the PTC heating element 3 and have the same length as the first surface. The low-position electrode portions 32 also extend to the first side surface of the PTC heating element 3, forming a high step 31 between the two low-position electrode portions 32 on the first surface. By setting the low-position electrode portions 32 with a high step 31, the creepage distance between the electrode sheets 2 located on the two low-position electrode portions 32 is increased. Compared to the creepage distance of the PTC heating element 3 without the high step 31, the creepage distance in this embodiment is increased by more than 2 times, and the power of a single PTC sheet is increased by more than 5% under the same operating conditions.

[0020] The electrode sheet 2 includes two electrodes, namely a positive electrode sheet and a negative electrode sheet. The positive electrode sheet and the negative electrode sheet are respectively installed on two low electrode sections 32. After the electrode sheet 2 is installed on the low electrode section 32, the plane is not higher than the plane of the high step 31.

[0021] like Figure 1 , Figure 3 As shown, the PTC heating element 3 is installed inside the aluminum tube 1, and a wire 4 is led out from the electrode plate 2. The wire 4 is led out from one end of the electrode plate 2 located on the first side, and the wire 4 passes through the aluminum tube 1 and is located outside the aluminum tube 1 for connection with the equipment.

[0022] By placing the electrode plate 2 on one surface of the PTC heating element 3, unilateral energization of the PTC heating element 3 is achieved. The wire 4 of the electrode plate 2 only needs to be led out from that side, resulting in a simple structure, improved space utilization, and reduced thermal resistance. By mounting the electrode plate 2 on the lower electrode section 32, the surface of the lower electrode section 32 is lower than the higher step 31, thereby increasing the creepage distance between the electrode plates 2 and improving the safety of the PTC heating element 3 during use.

[0023] The same-sided energized irregular PTC sheet structure provided in this embodiment saves space for the electrode on the other side by changing the structure of the PTC heating element 3. At the same time, the non-energized side only needs to be properly insulated and can be directly attached to the part to be heated, resulting in high heat conduction efficiency. It can be achieved using common plasticizing or grinding processes. In addition, during the installation process, the positioning structure of the high step 3132 of the PTC heating element 3 can ensure the accurate installation of each component, improving production efficiency and product quality.

[0024] Electrical performance tests were conducted on the fabricated PTC wafers. Under high humidity (85% relative humidity) and high voltage (1.5 times rated voltage) conditions, the creepage distance and insulation resistance between the electrode strips were tested. Test results showed that, compared to PTC wafers without height gradients, the creepage distance between the electrode strips of this invention increased by more than 200%, the insulation withstand voltage was significantly improved, effectively reducing the probability of creepage and enhancing the electrical safety and stability of the PTC wafer. Furthermore, under the same operating conditions, the power output of the tested products was increased by more than 5%.

[0025] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A PTC chip structure with irregular shape and same-side power transmission, characterized in that, It includes a PTC heating element and electrode plates. The first surface of the PTC heating element is provided with two spaced-apart low-position electrode portions. Two electrode plates are respectively disposed on the two low-position electrode portions. The two low-position electrode portions are arranged in parallel. The surface of the low-position electrode portion is lower than the first surface.

2. The same-sided electrically conductive irregularly shaped PTC sheet structure according to claim 1, characterized in that, The first surface is further provided with a high step, which is located between the two low-position electrode portions.

3. The same-sided electrically conductive irregularly shaped PTC sheet structure according to claim 1, characterized in that, The PTC heating element has a cuboid structure, and the low-position electrode section has a rectangular structure. The shape of the electrode sheet is adapted to the shape of the area of ​​the low-position electrode section.

4. The same-side electrically conductive irregularly shaped PTC sheet structure according to claim 3, characterized in that, The length of the low-position electrode portion is the same as that of the PTC heating element, and one end of the low-position electrode portion extends to the first side of the PTC heating element.

5. The same-sided electrically conductive irregularly shaped PTC chip structure according to claim 4, characterized in that, The wires on the positive and negative electrode plates on the low-position electrode section are led out from the first side and connected to the device.

6. The same-side electrically conductive irregularly shaped PTC sheet structure according to claim 4, characterized in that, A high step higher than the low electrode portion is formed between the two low electrode portions on the first side.

7. The same-sided electrically conductive irregularly shaped PTC sheet structure according to claim 1, characterized in that, The distance between the two lower electrode portions is not less than 2 mm.

8. The same-sided electrically conductive irregularly shaped PTC sheet structure according to claim 1, characterized in that, It also includes an aluminum tube, in which the PTC heating element is installed.

Images