Temperature control plug cord

Abstract

The utility model relates to the technical field of plug cord manufacturing, in particular to a temperature control plug cord which is formed by connecting a three-pole plug and a cable. The cable is formed by compounding a cable core and an insulating plastic sleeve. The cable core is formed by bundling a live wire, a zero wire, a ground wire and a signal control wire. And the live wire insertion piece, the zero wire insertion piece and the ground wire insertion piece are directly and electrically conducted with a live wire, a zero wire and a ground wire respectively. And the temperature switch is hidden in the plastic insulator and is electrically conducted with the signal control line. Under the assistance of the ceramic heat conduction piece, the temperature switch can indirectly sense the real-time temperature of the live wire insertion piece and the zero line insertion piece. In the using process of the temperature control plug cord, the temperature of the live wire insertion piece and the zero wire insertion piece can be transmitted to the temperature switch in real time through the ceramic heat conduction piece. When the temperature rises to a preset temperature value, the temperature sensing element of the temperature switch is heated to generate internal stress and acts quickly, the contact is opened, and the signal control line cannot form a current loop, so that the power supply is controlled by the power supply control box to interrupt power supply to the cable core.

Description

TECHNICAL FIELD

[0001] The utility model relates to plug wire manufacturing technical field especially, it is a temperature control plug wire. BACKGROUND

[0002] Three-pole plug wire is usually used in high-power power supply occasions, for example, it is suitable for refrigerator, washing machine, air conditioner and new energy vehicle charging etc. In the case of continuous high-power power supply, three-pole plug wire and the socket matched therewith are seriously heated, which further affects the stability and safety of power supply, and the three-pole plug wire, power cable core or socket is burned out from time to time, the reason is that 1) in the actual use process, the power current is too large, combined with the resistance of the cable core, which will inevitably cause the line heating, with the accumulation of time, the heat release exceeds the standard, and with the increase of temperature, the resistance value of the cable core also increases;2) three-pole plug wire and socket contact area is uneven or contact is bad from time to time, resulting in current overload, combined with the poor heat dissipation of three-pole plug wire and socket, which further causes the three-pole plug wire, power cable core or socket to be burned out due to local overheating, therefore, it is urgent for technical personnel to solve the above problems. SUMMARY

[0003] Therefore, the utility model design personnel in view of the above existing problems and defects, so as to collect relevant data, through the assessment and consideration of many parties, and after years of research and development experience of technical personnel in this industry, continuous experiment and modification, finally lead to the emergence of the temperature control plug wire.

[0004] In order to solve the above technical problems, the utility model relates to a temperature control plug wire, which is connected by three-pole plug and cable. The cable is composed of cable core and insulating plastic sleeve. The cable core is composed of parallel live wire, neutral wire, ground wire and signal control wire wrapped by insulating plastic sleeve. The signal control wire is used to control the power control box. The three-pole plug includes shape stabilizer, plastic insulator, live wire insert, neutral wire insert, ground wire insert, temperature switch and ceramic heat conducting part. The shape stabilizer is the fixed basis of live wire insert, neutral wire insert, ground wire insert and ceramic heat conducting part, and it is the injection molding growth basis of plastic insulator. The live wire insert, neutral wire insert and ground wire insert are directly electrically connected with live wire, neutral wire and ground wire respectively. The temperature switch is hidden in the plastic insulator and is electrically connected with the signal control wire. With the aid of ceramic heat conducting part, the temperature switch can indirectly sense the real-time temperature of live wire insert and neutral wire insert.

[0005] As further improvement of the disclosed technical scheme in the utility model, the ceramic heat conducting part is composed of a ceramic main body, a first heat conducting arm and a second heat conducting arm. A plug-in cavity for accommodating the temperature switch is formed on the tail end surface of the ceramic main body. In the state that the live wire plug, the zero line plug, the ground wire plug and the ceramic heat conducting part are fixed relative to the stable frame, the first heat conducting arm and the second heat conducting arm respectively correspond to the live wire plug and the zero line plug to keep the top contact state.

[0006] As further improvement of the disclosed technical scheme in the utility model, a strip-shaped through groove is formed on the front end surface of the ceramic main body.

[0007] As further improvement of the disclosed technical scheme in the utility model, the number of the strip-shaped through grooves is multiple, and the strip-shaped through grooves are linearly arranged along the width direction of the ceramic main body.

[0008] As further improvement of the disclosed technical scheme in the utility model, the temperature switch comprises a temperature sensing control main body and a first lead wire pin. The first lead wire pin is led out from the temperature sensing control main body, and is connected with the signal control line.

[0009] As further improvement of the disclosed technical scheme in the utility model, the temperature switch further comprises a second lead wire pin. The second lead wire pin is led out from the temperature sensing control main body, and is connected with the ground wire or the ground wire plug.

[0010] In the disclosed technical scheme in the utility model, the temperature switch is a switch using a bimetallic strip as a temperature sensing element. The ceramic heat conducting part has excellent electrical insulation and heat conductivity. In the use process of the temperature control plug line, the temperature of the live wire plug and the zero line plug is transmitted to the temperature switch in real time through the ceramic heat conducting part. When the temperature rises to a preset temperature value, the temperature sensing element of the temperature switch generates internal stress due to heat and rapidly acts to open the contact, so that the signal control line cannot form a current loop, thereby the power supply is interrupted to supply power to the cable core due to the control of the power supply control box, and the heat protection effect is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0012] Figure 1 is a perspective view of a first embodiment of the temperature control plug line disclosed in the utility model from a certain angle.

[0013] Figure 2is another perspective view of the first embodiment of the temperature-controlled plug wire.

[0014] Figure 3 is a perspective view of a three-pole plug in the first embodiment of the temperature-controlled plug wire.

[0015] Figure 4 is another perspective view of the three-pole plug in the first embodiment of the temperature-controlled plug wire.

[0016] Figure 5 is a wiring diagram of the three-pole plug and the cable core in the first embodiment of the temperature-controlled plug wire (with the plastic insulation body hidden).

[0017] Figure 6 is a perspective view of a three-pole plug in the first embodiment of the temperature-controlled plug wire (with the plastic insulation body hidden).

[0018] Figure 7 is another perspective view of the three-pole plug in the first embodiment of the temperature-controlled plug wire (with the plastic insulation body hidden).

[0019] Figure 8 is a perspective view of a ceramic heat-conducting member in the first embodiment of the temperature-controlled plug wire.

[0020] Figure 9 is another perspective view of the ceramic heat-conducting member in the first embodiment of the temperature-controlled plug wire.

[0021] Figure 10 is a wiring diagram of the three-pole plug and the cable core in the second embodiment of the temperature-controlled plug wire (with the plastic insulation body hidden).

[0022] 1-three-pole plug; 11-shape stabilizing frame; 12-plastic insulation body; 13-live plug; 14-neutral plug; 15-ground plug; 16-temperature switch; 161-temperature sensing control main body; 162-first lead wire pin; 163-second lead wire pin; 17-ceramic heat-conducting member; 171-ceramic main body; 1711-insertion cavity; 1712-bar-shaped through groove; 172-first heat-conducting arm; 173-second heat-conducting arm; 2-cable; 21-cable core; 211-live wire; 212-neutral wire; 213-ground wire; 214-signal control wire; 22-insulating plastic sleeve. DETAILED DESCRIPTION

[0023] Three-prong plug cables are typically used in high-power applications. Taking new energy vehicle charging as an example, they are used to connect to the charging station's socket panel and are equipped with a power control box to control the charging current, charging voltage, and the charging process. In fast charging scenarios, the high charging current reaches 150-400A, allowing the vehicle's battery to be fully charged in a short time.

[0024] The present invention will be further described in detail below with reference to specific embodiments. Figure 1 , Figure 2 Two perspective views of the first embodiment of the temperature control plug wire disclosed in this utility model are shown respectively. It can be seen that it is composed of a three-pole plug 1 and a cable 2. The cable 2 is composed of a cable core 21 and an insulating plastic sheath 22. The cable core 21 is composed of a bundle of parallel live wires 211, neutral wires 212, ground wires 213, and signal control wires 214, all wrapped in the insulating plastic sheath 22. The signal control wires 214 are used to input control signals to the power control box. The three-pole plug 1 mainly consists of a support frame 11, a plastic insulator 12, a live wire connector 13, a neutral wire connector 14, a ground wire connector 15, a temperature switch 16, and a ceramic heat-conducting component 17. The support frame 11 serves as the foundation for fixing the live wire connector 13, neutral wire connector 14, ground wire connector 15, and ceramic heat-conducting component 17, and also serves as the injection molding foundation for the plastic insulator 12. Furthermore, in the injection-molded and cold-cured state of the plastic insulator 12, the entire structure of the stabilizer 11, temperature switch 16, and ceramic heat-conducting component 17, as well as parts of the live wire connector 13, neutral wire connector 14, and ground wire connector 15, are concealed within it. The live wire connector 13, neutral wire connector 14, and ground wire connector 15 are directly electrically connected to the live wire 211, neutral wire 212, and ground wire 213, respectively. The temperature switch 16 is inserted into the tail of the ceramic heat-conducting component 17 and includes a temperature sensing and control body 161 and a first lead pin 162. The first lead pin 162 is directly led out from the temperature sensing and control body 161 and is connected to the signal control line 214. Thanks to the thermal conductivity of the ceramic heat-conducting component 17, the temperature switch 16 can indirectly sense the real-time temperature of the live wire connector 13 and the neutral wire connector 14 (e.g., ...). Figures 2-7 (as shown in the image).

[0025] In the technical scheme disclosed by the utility model, the temperature switch 16 is a switch using a bimetallic strip as a temperature sensing element. The ceramic heat conducting part 17 has excellent electrical insulation and heat conductivity. During use of the temperature control plug wire, the temperature at the live plug 13 and the neutral plug 14 is transmitted in real time to the temperature switch 16 through the ceramic heat conducting part 17. When the temperature rises to the preset temperature value, the temperature sensing control body 161 generates internal stress due to heat and rapidly acts to open the contact, so that the signal control line 214 cannot form a current loop, thereby interrupting the power supply to the cable core 21 due to control of the power supply control box, and the new energy vehicle can interrupt the charging process, thereby playing a thermal protection role.

[0026] As shown in Figure 8 、 9 , the ceramic heat conducting part 17 is composed of a ceramic body 171, a first heat conducting arm 172 and a second heat conducting arm 173. The ceramic body 171 is formed with a plug-in cavity 1711 for accommodating the temperature switch 16. In the state where the live plug 13, the neutral plug 14, the ground plug 15 and the ceramic heat conducting part 17 are fixed relative to the stabilizing frame 11, the first heat conducting arm 172 and the second heat conducting arm 173 are respectively in top contact with the live plug 13 and the neutral plug 14 (as shown in Figure 5 、 6 , 7).

[0027] Under the premise that heat can be quickly conducted from the live plug 13 and the neutral plug 14 to the temperature switch 16, in order to ensure the stability of the plug-in of the temperature switch 16 relative to the ceramic heat conducting part 17 and to avoid position change or accidental falling during the injection molding process of the plastic insulator 12 due to excessive impact force of the liquid resin, as a further optimization of the above technical scheme, the plug-in cavity 1711 can be filled with heat conducting silica gel (not shown in the figure) before the plug-in operation of the temperature switch 16 is performed. The temperature switch 16 can be stably inserted and quickly heat-conducted with the ceramic heat conducting part 17 by virtue of the excellent bonding performance and high heat conductivity of the heat conducting silica gel.

[0028] After the first batch of temperature control plug wires are put on the market, some southern customers feedback that the temperature control plug wire is prone to short circuit in a humid environment, which will inevitably affect the safety of the charging process of the new energy vehicle. The reason is that the fusion degree of the material is insufficient, and after the plastic insulator 12 is injection molded, it is difficult to wrap the live plug 13, the neutral plug 14, the ground plug 15 and the ceramic body 171 without gaps, and some water vapor enters through the gap and easily condenses into water on the ceramic body 171, thereby causing the risk of short circuit of the live plug 13 and the neutral plug 14. In view of this, as a further optimization of the above technical scheme, as shown in Figure 8 、 9As shown in the drawings, a strip-shaped through groove 1712 is formed on the front end face of the ceramic body 171, and the number of the strip-shaped through grooves 1712 is multiple, and is arranged linearly along the width direction of the ceramic body 171. In this way, in the use process of the temperature control plug wire, a large amount of condensed water can be stored in the strip-shaped through grooves 1712, so as to effectively prevent the occurrence of the "short circuit" phenomenon caused by the direct electrical conduction of the live plug piece 13 and the zero plug piece 14 due to the excessive condensed water.

[0029] Figure 10 The wiring schematic diagram of the three-pole plug and the cable core in the second embodiment of the temperature control plug wire disclosed in the utility model is shown, and it can be known that the difference between the second embodiment and the first embodiment is that the temperature switch 16 is grounded. The temperature switch 16 further comprises a second lead pin 163. The second lead pin 163 is led out from the temperature sensing control body 161, and is connected with the ground wire 213 or the ground plug piece 15. In this way, the temperature switch 16 not only monitors the temperature change of the live plug piece 13, the zero plug piece 14 and the plug surface, and performs overheat protection, but also can ensure that the current can flow back to the ground through the ground wire when the temperature switch 16 or the related electrical equipment appears the leakage situation, so as to be beneficial to the safety of the person and the equipment.

[0030] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the utility model. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A temperature controlled plug cord, characterized by, The utility model provides a three -pole plug and cable connection, the cable is composed of the core and the insulating plastic sleeve, the core is composed of the live wire, the zero line, the ground wire and the signal control line which are parallel and are wrapped by the insulating plastic sleeve, the signal control line is used for controlling the power control box, the three -pole plug includes the stable frame, the plastic insulator, the live wire insert piece, the zero line insert piece, the ground wire insert piece, the temperature switch and the ceramic heat conducting part, the stable frame is the fixed foundation of the live wire insert piece, the zero line insert piece, the ground wire insert piece and the ceramic heat conducting part, and it is the injection growth foundation of the plastic insulator, the live wire insert piece, the zero line insert piece, the ground wire insert piece and the ceramic heat conducting part are directly electrically connected with the live wire, the zero line and the ground wire respectively, The temperature switch is hidden in the plastic insulator and is electrically connected with the signal control line, and the temperature switch can indirectly sense the real-time temperature of the live wire insert piece and the zero line insert piece with the aid of the ceramic heat conducting part.

2. The temperature controlled plug cord of claim 1, wherein The ceramic heat conducting part is composed of the ceramic main body, the first heat conducting arm and the second heat conducting arm, the tail end surface of the ceramic main body is formed with the plug-in cavity for the temperature switch, and the first heat conducting arm and the second heat conducting arm are respectively and correspondingly in contact with the live wire insert piece and the zero line insert piece when the live wire insert piece, the zero line insert piece, the ground wire insert piece and the ceramic heat conducting part are fixed on the stable frame.

3. The temperature controlled plug cord of claim 2, wherein The front end surface of the ceramic main body is formed with the strip-shaped through groove.

4. The temperature controlled plug cord of claim 3, wherein The number of the strip-shaped through grooves is multiple, and they are linearly arranged along the width direction of the ceramic main body.

5. The temperature controlled plug cord of any of claims 1-4, wherein The temperature switch includes the temperature sensing control main body and the first lead wire pin, the first lead wire pin is led out from the temperature sensing control main body and is connected with the signal control line.

6. The temperature controlled plug cord of claim 5, wherein The temperature switch further includes the second lead wire pin, the second lead wire pin is led out from the temperature sensing control main body and is connected with the ground wire or the ground wire insert piece.

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