PTC heater aluminum tube and temperature controller fixing structure and PTC heater

Abstract

The utility model discloses a PTC heater aluminum pipe and temperature controller fixing structure, which comprises a temperature controller and an aluminum pipe used for assembling a PTC heating core body, the aluminum pipe comprises two oppositely arranged heat conduction surfaces, one end of one heat conduction surface is provided with a first opening hole, the first opening hole is communicated with an inner cavity of the aluminum pipe, the aluminum pipe is provided with a temperature control box, and the temperature control box is provided with a temperature sensor. The temperature control box comprises a temperature control box base and a temperature control box upper cover, the temperature controller is arranged in the temperature control box, the temperature control box base is fixed on a heat conduction surface provided with a first opening, a buckle is arranged on one surface, opposite to the heat conduction surface provided with the first opening, of the temperature control box base, and a fixing part is arranged at one end, far away from the buckle, of the temperature control box base. The utility model also discloses a PTC heater. Compared with the prior art, under the long-term high-temperature working condition, the temperature control box can be tightly attached without falling off, and the functions of normal temperature sensing and over-temperature protection of the temperature controller in the temperature control box are achieved.

Description

Technical Field

[0001] This utility model relates to a PTC heater, and more particularly to a PTC heater aluminum tube and temperature controller fixing structure and a PTC heater. Background Technology

[0002] Currently, the temperature controllers on PTC heaters are fixed to the aluminum tube of the PTC heater by adhesive bonding. Since this bonding is done using silicone sealant or silicone rubber, and PTC heaters are subjected to dry burning at temperatures above 200 degrees Celsius and long-term high-temperature operation, the silicone sealant is prone to aging (carbonization and decomposition), causing the adhesive to detach and the product's over-temperature protection function to fail. Furthermore, the adhesive bonding itself is not very strong and is easily detached due to external impacts or vibrations. Utility Model Content

[0003] The purpose of this utility model is to provide a fixing structure for the aluminum tube and the temperature controller of a PTC heater and a PTC heater. The technical problem to be solved is to prevent the temperature controller from falling off and causing the over-temperature protection function to fail.

[0004] To solve the above problems, the present invention adopts the following technical solution: a PTC heater aluminum tube and temperature controller fixing structure, including a temperature controller and an aluminum tube for assembling a PTC heating core. The aluminum tube includes two oppositely arranged heat-conducting surfaces. A first opening is provided at one end of one of the heat-conducting surfaces, and the first opening communicates with the inner cavity of the aluminum tube. A temperature control box is provided on the aluminum tube. The temperature control box includes a temperature control box base and a temperature control box cover. The temperature controller is disposed in the temperature control box. The temperature control box base is fixed on the heat-conducting surface with the first opening. A buckle is provided on the side of the temperature control box base opposite to the heat-conducting surface with the first opening. A fixing part is provided at the end of the temperature control box base away from the buckle. After the temperature control box base is snapped into the edge of the first opening by the buckle, the fixing part is connected and fixed to the aluminum tube by welding.

[0005] Furthermore, the temperature control box base is provided with a second opening opposite to the position of the first opening.

[0006] Furthermore, the first opening is U-shaped.

[0007] Furthermore, the buckle includes a protrusion that protrudes toward the first opening, and a groove is provided at the end of the protrusion that is away from the fixing part.

[0008] Furthermore, there are two buckles, symmetrically arranged on the base of the temperature control box.

[0009] Furthermore, a connecting wire is provided in the base of the temperature control box, with one end of the connecting wire leading out from the temperature control box and the other end having an electrical connector.

[0010] This utility model also discloses a PTC heater, including multiple PTC heating cores, and a fixing structure for the PTC heater aluminum tube and the temperature controller. The number of aluminum tubes is the same as the number of PTC heating cores. The PTC heating cores are set in the inner cavity of the aluminum tubes. At least one aluminum tube is equipped with a temperature controller. The wire of the PTC heating core in the aluminum tube with the temperature controller is led out from the first opening.

[0011] Furthermore, a connecting wire is provided in the base of the temperature control box. One end of the connecting wire is led out from the temperature control box, and the other end is provided with an electrical connector. The wire of the PTC heating core is connected to the electrical connector.

[0012] Compared with the prior art, this utility model provides a first opening on the aluminum tube and a buckle and fixing part on the temperature control box base. The temperature control box base can be engaged with the edge of the first opening by the buckle and then the fixing part is welded to the aluminum tube. This ensures that the temperature control box stays firmly in place even under long-term high-temperature conditions. It also achieves the functions of normal temperature sensing and over-temperature protection of the internal temperature controller. This structure can also prevent the temperature control box from falling off due to external factors such as vibration and external force. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a partial enlarged view of the present invention.

[0015] Figure 3 This is an exploded view of the present invention.

[0016] Figure 4 This is a schematic diagram of the bottom structure of the temperature control box of this utility model.

[0017] Figure 5 This is a schematic diagram of the internal structure of this utility model. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0019] like Figures 1 to 5As shown, this utility model discloses a fixing structure for a PTC heater aluminum tube and a temperature controller, including a temperature controller 1 and an aluminum tube 2 for assembling a PTC heating core. The aluminum tube 2 includes two opposing heat-conducting surfaces and has an inner cavity for assembling the PTC heating core. A first opening 3 is provided at one end of one of the heat-conducting surfaces. The first opening 3 is located on the same side as the end from which the PTC heating core lead wire is led out, that is, the first opening 3 is located at one end of the aluminum tube 2 and communicates with the inner cavity of the aluminum tube 2. A temperature control box is provided on the aluminum tube 2. The temperature control box includes a temperature control box base 4 and a temperature control box cover 5. The temperature control box base 4 is provided with a housing for accommodating the temperature controller 1. The cavity has an opening, which is closed by the temperature control box cover 5. The temperature control box cover 5 and the temperature control box base 4 can be connected and fixed as one piece by ultrasonic welding. The temperature controller 1 is set in the cavity of the temperature control box base 5. The temperature control box base 4 is fixed on the heat-conducting surface with the first opening 3. The side of the temperature control box base 4 opposite to the heat-conducting surface with the first opening 3 is provided with a buckle 6. A fixing part 7 is provided at the end of the temperature control box base 4 away from the buckle 6. The fixing part 7 and the temperature control box base 4 adopt an integral molding structure. After the temperature control box base 4 is fastened to the edge of the first opening 3 by the buckle 6, the fixing part 7 is connected and fixed to the heat-conducting surface of the aluminum tube 2 by laser welding.

[0020] like Figure 4 and Figure 5 As shown, a second opening 8 is provided on the temperature control box base 4, which is opposite to the position of the first opening 3, so that the lead wire of the PTC heating core can pass through the first opening 3 and the second opening 8 and then be led out from the wire outlet between the temperature control box base 4 and the temperature control box cover 5, which facilitates the wiring of the PTC heating core. This also allows the openings at both ends of the aluminum tube 2 to be sealed with silicone.

[0021] like Figure 5 As shown, in this utility model, the first opening 3 is concave, while the second opening 8 is convex. Specifically, the buckle 6 includes a protruding part 9 protruding towards the first opening 3, and a groove 10 is provided at one end of the protruding part 9 away from the fixing part 7, thereby forming the buckle 6. Preferably, there are two buckles 6, symmetrically arranged on the temperature control box base 4. Figure 5 As can be seen, the two buckles 6 are set at both ends of the protruding part of the second opening 8, and the first opening 3 is set as a concave shape, so as to avoid the two buckles 6.

[0022] like Figure 5 As shown, the protrusion 9 is L-shaped, including a first body that is parallel to the length direction of the temperature control box base 4 and a second body that is perpendicular to the length direction of the temperature control box base 4. The second body is disposed away from the fixing part 7, and the groove 10 is formed on the second body to increase the strength of the buckle.

[0023] likeFigure 4 As shown, a connecting wire 11 is provided in the temperature control box base 4. One end of the connecting wire 11 is led out from the wire outlet between the temperature control box base 4 and the temperature control box cover 5, and the other end is provided with an electrical connector 12 to reduce assembly difficulty.

[0024] like Figures 1 to 5 As shown, this utility model also discloses a PTC heater, including multiple PTC heating cores, which is prior art and will not be described in detail here. Here, we take one of the aluminum tubes equipped with a temperature controller 1 as an example for detailed description. The PTC heater in this utility model also includes the above-mentioned PTC heater aluminum tube and temperature controller fixing structure. In the PTC heater disclosed in this utility model, the number of aluminum tubes 2 is the same as the number of PTC heating cores. The PTC heating cores are set in the inner cavity of the aluminum tubes 2. One of the aluminum tubes 2 is equipped with a temperature controller 1. The wire of the PTC heating core in the aluminum tube 2 equipped with the temperature controller 1 passes through the first opening 3 and the second opening 8 and is led out from the wire lead-out outlet between the temperature control box base 4 and the temperature control box cover 5.

[0025] In this invention, the wires of the PTC heating core can pass through the first opening 3 and the second opening 8 and then be led out from the wire outlet between the temperature control box base 4 and the temperature control box cover 5. Alternatively, an electrical connector that is electrically connected to the connecting wire 11 can be set on the wires of the PTC heating core to achieve quick insertion with the electrical connector 12, thereby reducing assembly difficulty.

[0026] During assembly, firstly, the PTC heating core is inserted into the inner cavity of the aluminum tube 2. Then, the lead wire of the PTC heating core is passed through the first opening 3. The aluminum tube 2 and the PTC heating core are pressed together by a press, so that the heating surface of the PTC heating core is in close contact with the heat-conducting surface of the aluminum tube 2. Secondly, after connecting the electrical connector 12 on the temperature control box to the lead wire of the PTC heating core, the temperature control box is tilted and the groove 10 of the buckle is aligned with the edge of the first opening 3 near the aluminum tube 2 and inserted. After the groove 10 is engaged with the edge of the first opening 2, the temperature control box is attached to the aluminum tube. At this time, the fixing part 7 is welded to the heat-conducting surface of the aluminum tube by laser welding, so that the temperature control box and the aluminum tube are connected and fixed, and the assembly is completed.

[0027] This utility model achieves both ends of the temperature control box base and the aluminum tube being fixed by setting buckles and fixing parts at both ends, thereby improving the assembly strength between the aluminum tube and the temperature control box and preventing the temperature control box from falling off due to high temperature, external force, vibration and other factors, which would affect the product performance.

Claims

1. A PTC heater aluminum tube and temperature controller fixing structure, comprising a temperature controller (1) and an aluminum tube (2) for assembling a PTC heating core, characterized in that: The aluminum tube (2) includes two opposing heat-conducting surfaces. A first opening (3) is provided at one end of one of the heat-conducting surfaces. The first opening (3) connects to the inner cavity of the aluminum tube (2). A temperature control box is provided on the aluminum tube (2). The temperature control box includes a temperature control box base (4) and a temperature control box cover (5). A temperature controller (1) is provided in the temperature control box. The temperature control box base (4) is fixed on the heat-conducting surface with the first opening (3). A buckle (6) is provided on the side of the temperature control box base (4) opposite to the heat-conducting surface with the first opening (3). A fixing part (7) is provided at the end of the temperature control box base (4) away from the buckle (6). After the temperature control box base (4) is snapped into the edge of the first opening (3) by the buckle (6), the fixing part (7) is connected and fixed to the aluminum tube (2) by welding.

2. The fixing structure for the PTC heater aluminum tube and temperature controller according to claim 1, characterized in that: The temperature control box base (4) is provided with a second opening (8) that is opposite to the position of the first opening (3).

3. The fixing structure for the PTC heater aluminum tube and the temperature controller according to claim 2, characterized in that: The first opening (3) is U-shaped.

4. The fixing structure for the PTC heater aluminum tube and temperature controller according to claim 3, characterized in that: The buckle (6) includes a protrusion (9) that protrudes toward the first opening (3), and a groove (10) is provided at one end of the protrusion (9) away from the fixing part (7).

5. The fixing structure for the PTC heater aluminum tube and temperature controller according to claim 4, characterized in that: Two buckles (6) are provided, symmetrically arranged on the temperature control box base (4).

6. The fixing structure for the PTC heater aluminum tube and temperature controller according to any one of claims 1-5, characterized in that: A connecting wire (11) is provided in the temperature control box base (4). One end of the connecting wire (11) is led out from the temperature control box, and the other end is provided with an electrical connector (12).

7. A PTC heater, comprising a plurality of PTC heating cores, characterized in that: It also includes the PTC heater aluminum tube and temperature controller fixing structure as described in any one of claims 1-5, wherein the number of aluminum tubes (2) is the same as the number of PTC heating cores, the PTC heating cores are set in the inner cavity of the aluminum tubes (2), at least one aluminum tube (2) is provided with a temperature controller (1), and the wire of the PTC heating core in the aluminum tube (2) with the temperature controller (1) is led out from the first opening (3).

8. The PTC heater according to claim 7, characterized in that: A connecting wire (11) is provided in the temperature control box base (4). One end of the connecting wire (11) is led out from the temperature control box, and the other end is provided with an electrical connector (12). The wire of the PTC heating core is connected to the electrical connector (12).

Images