Temperature control national standard plug cord

Abstract

The utility model relates to the technical field of plug cord manufacturing, in particular to a temperature control national standard 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 and a ground wire. The shape stabilizing frame serves as a rooting fixing foundation of the live wire insertion piece, the zero wire insertion piece and the ground wire insertion piece and serves as an injection molding growth foundation of the plastic insulator. The zero line insertion piece and the ground line insertion piece are directly and electrically conducted with a zero line and a ground line respectively, and the live line insertion piece is electrically conducted with a live line through a temperature switch. Therefore, due to the fact that the temperature switch is connected between the live wire and the live wire insertion piece in series, the temperature switch can effectively control the on / off process of the power supply circuit, the circuit can be cut off in time under the condition that the working temperature exceeds the limit, and the thermal protection effect is achieved.

Description

TECHNICAL FIELD

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

[0002] Three-pole plug wire is usually used in high-power power supply occasions, for example, it is suitable for refrigerators, washing machines, air conditioners 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 plug wire, power cable core or socket are 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 to heat up. With the accumulation of time, the heat exceeds the standard, and with the increase of temperature, the resistance value of the cable core also increases; 2) the contact area of three-pole plug wire and socket is uneven or poor, which leads to current overload, combined with the poor heat dissipation of plug wire and socket, which further causes the problem of local overheating of three-pole plug wire, power cable core or socket. 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-mentioned problems and defects, and the collection of relevant data, through the evaluation and consideration of many parties, and through the continuous experiment and modification of the technical personnel engaged in this industry for many years of research and development experience, finally lead to the appearance of the temperature control national standard plug wire.

[0004] In order to solve the above technical problems, the utility model relates to a temperature control national standard 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 three parallel live wire, neutral wire and ground wire bundled by insulating plastic sleeve. The three-pole plug includes shape stabilizer, plastic insulator, live wire insert, neutral wire insert, ground wire insert and temperature switch. The shape stabilizer is the root fixed basis of live wire insert, neutral wire insert and ground wire insert, and it is the injection molding growth basis of plastic insulator. The neutral wire insert and ground wire insert are directly electrically connected with neutral wire and ground wire respectively, and the live wire insert is electrically connected with live wire through temperature switch. After the plastic insulator is injection molded, the temperature switch is hidden in it.

[0005] As a further improvement of the technical scheme disclosed by the utility model, the temperature switch includes temperature sensing control body, first lead wire pin and second lead wire pin. The first lead wire pin is connected with the live wire insert. The second lead wire pin is connected with the live wire. The current is conducted to the live wire in sequence through the live wire insert, the first lead wire pin, the temperature sensing control body and the second lead wire pin.

[0006] As further improvement of the technical scheme disclosed by the utility model, the live wire plug is made of copper material, and a plug-in groove is formed at the tail end of the live wire plug. After the first lead pin is inserted into the plug-in groove to a set length, the live wire plug is subjected to a counter-pressing force, and the plug-in groove is pinched tightly around the first lead pin due to the pinched shape.

[0007] Of course, as another modification design of the above technical scheme, the live wire plug and the first lead pin can also be fixed by soldering. A tin container groove is formed at the tail end of the live wire plug. After the first lead pin is inserted into the tin container groove to a set length, molten tin liquid is filled into the tin container groove and solidified.

[0008] As further improvement of the technical scheme disclosed by the utility model, the three-pole plug further comprises a metal wire ring. After the second lead pin and the live wire are inserted into the metal wire ring, the metal wire ring is subjected to a counter-pressing force and pinched.

[0009] As further improvement of the technical scheme disclosed by the utility model, a plug-in blind hole is formed in the central region of the stabilizing frame, which can be inverted by the temperature sensing control body. There is an interference between the temperature sensing control body and the plug-in blind hole.

[0010] As further improvement of the technical scheme disclosed by the utility model, the temperature switch further comprises a third lead pin. The third lead pin is led out from the temperature sensing control body and electrically connected to the ground wire or the ground wire plug.

[0011] In the technical scheme disclosed by the utility model, the temperature switch is connected in series between the live wire and the live wire plug, so as to ensure that the temperature switch can effectively control the on / off process of the power supply circuit, and cut off the circuit in case of over-temperature, thereby playing a heat protection role.

[0012] In detail:

[0013] The on / off function of the control circuit: the temperature switch is an important element in the circuit. When the temperature switch is in a normal working state, the contact is in a closed state, and the power supply circuit can maintain a pass state; when the working temperature rises to a set temperature value, the contact of the temperature switch will be quickly disconnected, thereby cutting off the power supply circuit and preventing the electrical equipment from being damaged due to overheating.

[0014] Heat protection function: during the working process of the electrical equipment, once the working temperature exceeds the set temperature value, the temperature switch can immediately respond and cut off the circuit, thereby effectively avoiding damage to the electrical equipment due to long-term overheating, and even causing fire accidents and other safety accidents.

[0015] The temperature switch is connected in series with the live wire instead of the zero line or the ground wire, so that when the temperature switch performs a closing action due to over-limit working temperature, the electrical equipment can be completely powered off, and the risk of electric shock can be effectively avoided during maintenance or replacement of the electrical equipment, and the application safety is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 is a perspective view of a three-pole plug in the first embodiment of the temperature-controlled national standard plug wire.

[0018] Figure 2 is a perspective view of a three-pole plug in the first embodiment of the temperature-controlled national standard plug wire.

[0019] Figure 3 is a perspective view of a three-pole plug in the first embodiment of the temperature-controlled national standard plug wire.

[0020] Figure 4 is a perspective view of a three-pole plug in the first embodiment of the temperature-controlled national standard plug wire.

[0021] Figure 5 is a perspective view of a three-pole plug in the first embodiment of the temperature-controlled national standard plug wire.

[0022] Figure 6 is a perspective view of a three-pole plug in the first embodiment of the temperature-controlled national standard plug wire.

[0023] Figure 7 is a perspective view of a three-pole plug in the first embodiment of the temperature-controlled national standard plug wire.

[0024] Figure 8 is a perspective view of a three-pole plug in the first embodiment of the temperature-controlled national standard plug wire.

[0025] Figure 9 is a perspective view of a three-pole plug in the first embodiment of the temperature-controlled national standard plug wire.

[0026] 1-Three-pole plug; 11-Stabilizing bracket; 111-Seam filler molding body; 12-Plastic insulator; 13-Live wire connector; 14-Neutral wire connector; 15-Ground wire connector; 16-Temperature switch; 161-Temperature sensing and control body; 162-First lead pin; 163-Second lead pin; 164-Third lead pin; 17-Metal cable tie ring; 2-Cable; 21-Cable core; 211-Live wire; 212-Neutral wire; 213-Ground wire; 22-Insulating plastic sleeve. Detailed Implementation

[0027] 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 and voltage. In fast charging scenarios, the high charging current reaches 150-400A, allowing the vehicle's battery to be fully charged in a short time.

[0028] The present invention will be further described in detail below with reference to specific embodiments. Figure 1 , Figure 2 This illustration shows two different perspectives of the first embodiment of the temperature-controlled national standard plug cable disclosed in this utility model. 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 three parallel wires—a live wire 211, a neutral wire 212, and a ground wire 213—bundled together and encased in the insulating plastic sheath 22. 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, and a temperature switch 16. The support frame 11 serves as the foundation for fixing the live wire connector 13, neutral wire connector 14, and ground wire connector 15, and also as the injection molding foundation for the plastic insulator 12. The neutral wire connector 14 and the ground wire connector 15 are directly electrically connected to the neutral wire 212 and the ground wire 213, respectively. The temperature switch 16 includes a temperature sensing and control body 161, a first lead 162, and a second lead 162. The first lead 162 is connected to the live wire connector 13. The second lead 162 is connected to the live wire 211. Current is conducted to the live wire 211 sequentially through the live wire connector 13, the first lead 162, the temperature sensing and control body 161, and the second lead 162. After the plastic insulator 12 is injection molded, the temperature switch 16 is concealed within it (e.g., ...). Figures 3-6 (as shown in the image).

[0029] In practical applications, the temperature switch 16 has the function of controlling the circuit to be turned on / off, and from this comes the functions of thermal protection and improved application safety, specifically:

[0030] On / off function of the control circuit: Temperature switch 16 is an important component in the circuit. When temperature switch 16 is in normal working condition, its contacts are closed, and the power supply circuit remains open; when the working temperature rises to the set temperature value, the contacts of temperature switch 16 will quickly open, the live wire 211 will be disconnected from the live wire plug 13, the power supply circuit will be cut off, and the electrical equipment will be prevented from being damaged due to overheating.

[0031] Thermal protection function: During the operation of electrical equipment, once the operating temperature exceeds the set temperature value, the temperature switch 16 can immediately respond and cut off the circuit, thereby effectively preventing the electrical equipment from being damaged by overheating for a long time, or even causing safety accidents such as fire.

[0032] Enhanced safety features: The temperature switch 16 is connected in series with the live wire 211, instead of the neutral wire 212 or the ground wire 213. This ensures that the electrical equipment is completely powered off when the temperature switch 16 closes due to exceeding its operating temperature limit. Furthermore, it effectively avoids the risk of electric shock during the maintenance or replacement of electrical equipment, thus improving application safety.

[0033] It is known that the live wire connector 13 can adopt various design structures to achieve reliable connection and electrical conduction with the first lead 162. However, in this implementation, a technical solution with an extremely simple design structure and relatively low implementation difficulty and cost is recommended. Specifically, the live wire connector 13 is preferably made of copper, which has excellent ductility and conductivity. Figure 5 As can be clearly seen in the diagram, a slot is formed at the tail end of the live wire insert 13. After the first lead 162 extends into the slot to the set length, the tail end of the live wire insert 13 is subjected to opposing compressive force, and the slot reliably clamps the first lead 162 due to its collapsed shape.

[0034] Of course, as an alternative design to the above technical solution, the fire wire connector 13 and the first lead 162 can also be fixed by soldering. The tail end of the fire wire connector 13 is formed into a solder reservoir. After the first lead 162 extends into the solder reservoir to a set length, molten solder fills the solder reservoir and solidifies.

[0035] Furthermore, by Figure 5 As can also be clearly seen from the diagram, a metal wire harness ring 17 is also provided inside the three-pole plug 1. After the second lead 162 and the live wire 211 are inserted into the metal wire harness ring 17, the metal wire harness ring 17 is flattened by the opposing squeezing force, and the second lead 162 and the live wire 211 can achieve good electrical conduction.

[0036] According to the feedback of the production department, in the injection molding process of the plastic insulator 12, the temperature switch 16 is easily out of the expected design direction due to the impact force from the fluid resin, and better injection molding process control is required. Figure 7 The second embodiment of the temperature control national standard plug line is shown in the wiring diagram of the three-pole plug and the cable core, and it can be known that the difference from the first embodiment is that a plug-in blind hole is formed in the central region of the stabilizing frame 11 to insert the temperature sensing control body 161. The plug-in blind hole is pre-filled with a caulking glue. After the temperature sensing control body 161 is inserted into the plug-in blind hole, the caulking glue is gradually solidified into a caulking glue forming body 111 after a period of time.

[0037] Of course, the same is true for ensuring the stability and reliability of the plug-in, and as another modification design of the above technical solution, the temperature sensing control body 161 and the plug-in blind hole can also adopt an interference fit to achieve plug-in.

[0038] Figure 8 The third embodiment of the temperature control national standard plug line is shown in the wiring diagram of the three-pole plug and the cable core, and it can be known that the difference from the first embodiment and the second embodiment is that the temperature switch 16 is grounded. Figure 9 As shown in the third embodiment, a third lead pin 164 is also led out of the temperature sensing control body 161. After the temperature control national standard plug line is formed, the third lead pin 164 is electrically connected to the ground wire 213 or the ground plug 15. In this way, the temperature switch 16 not only controls the on / off of the power supply circuit and performs overheat protection, but also ensures that the current can flow back to the ground when the temperature switch 16 or the related electrical equipment leaks, thereby protecting the safety of the human body and the equipment.

[0039] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these 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 present application. Therefore, the present application should not be limited to the embodiments shown herein, but should be consistent with the widest scope of principles and novel features disclosed herein.

Claims

1. A temperature controlled national plug cord, characterized by, The utility model provides a three -pole plug and cable connection, the cable is composed of cable core and insulating plastic sleeve, the cable core is composed of three parallel live wire, zero line and ground wire, the three -pole plug includes stable frame, plastic insulator, live wire insert piece, zero line insert piece, ground wire insert piece and temperature switch, the stable frame is the fixed basis of live wire insert piece, zero line insert piece and ground wire insert piece, and it is the injection molding growth basis of plastic insulator, zero line insert piece and ground wire insert piece are directly electrically connected with zero line and ground wire respectively, and live wire insert piece is electrically connected with live wire through temperature switch, and temperature switch is hidden in plastic insulator after injection molding.

2. The temperature controlled national plug cord of claim 1, wherein Temperature switch includes temperature sensing control body, first lead wire foot and second lead wire foot, first lead wire foot is connected with live wire insert piece, second lead wire foot is connected with live wire, current is conducted to live wire through live wire insert piece, first lead wire foot, temperature sensing control body and second lead wire foot.

3. The temperature controlled national plug cord of claim 2, wherein Live wire insert piece is made of copper, and the tail end is formed into insertion groove, first lead wire foot is inserted into insertion groove to a certain length, live wire insert piece is pressed from both sides, and insertion groove is pinched to clamp first lead wire.

4. The temperature controlled national plug cord of claim 2, wherein The tail end of live wire insert piece is formed into tin containing groove, first lead wire foot is inserted into tin containing groove to a certain length, molten tin is filled into tin containing groove, and solidification is carried out.

5. The temperature controlled national plug cord of claim 2, wherein Three -pole plug also includes metal wire ring, second lead wire foot and live wire are inserted into metal wire ring, metal wire ring is pinched to clamp second lead wire foot.

6. The temperature controlled national plug cord of any of claims 2-5, wherein Blind hole is formed in the center area of stable frame, temperature sensing control body is inserted into blind hole, and the fit between temperature sensing control body and blind hole has interference.

7. The temperature controlled national plug cord of any of claims 2-5, wherein Temperature switch also includes third lead wire foot, third lead wire foot is led out from temperature sensing control body, and is electrically connected with ground wire or ground wire insert piece.

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