Temperature control type national standard plug cord
By introducing a temperature monitoring and current regulation system into the three-core plug wire, the problem of heat loss of the plug wire and socket is solved, which improves the safety and life of use, and ensures the reliability and safety of large-function electrical appliances.
Patent Information
- Application Number
- CN202411408077.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2024-12-06
AI Technical Summary
In high-power power supply occasions, the three-core plug wire is prone to heat due to excessive current, and the contact is uneven or the heat dissipation is not up to standard, which leads to burning and damage to the plug wire, power supply cable core or socket, affecting the power supply stability and safety.
A temperature-controlled national standard plug cable is designed, which uses a three-pole plug and cable connection. The cable is composed of a cable core and an insulated plastic sleeve, equipped with a first temperature measurement component and a second temperature measurement component, through thermistor and current The sensing resistor monitors the temperature and current, transmits the temperature parameters to the power control box in real time, and reduces the supply current to avoid overheating if the temperature exceeds the threshold.
It effectively avoids overheating and burning of plug cables and sockets, improves the safety and life of use, and ensures the reliability and safety of large-function electrical appliances.
Smart Images
Figure CN119093097A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of plug wire manufacturing, in particular to a temperature-controlled national standard plug wire. Background Art
[0002] Three-core plug wires are usually used in high-power power supply occasions, such as refrigerators, washing machines, air conditioners, and new energy vehicle charging. Under continuous high-power power supply, the three-core plug wire and the socket that matches it will heat up seriously, which will affect the stability and safety of the power supply, and the plug wire, power cable core or socket will be burned from time to time. The reasons are as follows: 1) During the application process, the power supply current is too large, and the cable core has a certain resistance, which will inevitably cause the line to heat up. As time accumulates, the heat generation exceeds the standard, and as the temperature rises, the resistance value of the cable core also increases; 2) The contact area between the three-core plug wire and the socket is uneven or the contact is poor, which leads to current overload. In addition, the heat dissipation of the plug wire and the socket does not meet the standard, which causes the three-core plug wire, power cable core or socket to burn due to local overheating. Therefore, it is urgent for technical personnel to solve the above problems. Summary of the invention
[0003] Therefore, in view of the above-mentioned existing problems and defects, the designers of the present invention collected relevant information, conducted multiple evaluations and considerations, and continuously experimented and modified the technology after many years of R&D experience in this industry, which ultimately led to the emergence of the temperature-controlled national standard plug line.
[0004] In order to solve the above technical problems, the present invention relates to a temperature-controlled national standard plug wire, which is connected by a three-pole plug and a cable. The cable is composed of a cable core and an insulating plastic sleeve. The cable core is wrapped by an insulating plastic sleeve to be isolated from the external environment. The cable core is bundled by three parallel live wires, a neutral wire and a ground wire. The three-pole plug includes a plastic insulator, a live wire plug, a neutral wire plug and a ground wire plug. The live wire plug, the neutral wire plug and the ground wire plug are all rooted and fixed in the plastic insulator, and their tail ends are electrically connected to the live wire, the neutral wire and the ground wire respectively. The three-pole plug also includes a first temperature measuring component and a second temperature measuring component. The first temperature measuring component is used to directly monitor the real-time temperature change of the plastic insulator, and it includes a thermistor and a first wire. The thermistor is hidden in the plastic insulator, and it is electrically connected to the ground wire plug with the help of the first wire. The second temperature measuring component is used to indirectly monitor the actual temperature change of the socket panel, and includes a current sensing resistor, a first conductive copper sleeve, a second wire and a third wire. The first conductive copper sleeve is rooted in the plastic insulator, and the end is exposed. The two ends of the current sensing resistor are respectively electrically connected to the first conductive copper sleeve and the ground wire plug by means of the second wire and the third wire.
[0005] As a further improvement of the technical solution disclosed in the present invention, a power supply system for supplying electric energy to a temperature-controlled national standard plug line is equipped with a power control box. The first temperature measuring component also includes a first signal transmission line. The first signal transmission line is used to transmit the temperature parameter of the plastic insulator monitored by the thermistor to the power control box in real time, and it is electrically connected to the thermistor. The second temperature measuring component also includes a second signal transmission line. The second signal transmission line is used to transmit the temperature parameter of the socket panel monitored by the current sensing resistor to the power control box in real time, and it is electrically connected to the current sensing resistor. When any one of the temperature parameter of the plastic insulator and the temperature parameter of the socket panel reaches the temperature threshold, under the intervention of the power control box, the power supply current of the cable core drops instantaneously.
[0006] As a further improvement of the technical solution disclosed in the present invention, the tail end of the thermistor is formed with a first insertion cavity. The tail end of the first conductive copper sleeve is formed with a second insertion cavity. The tail end of the ground wire plug is formed with a third insertion cavity. The first signal transmission line and the first conductor are clustered and inserted into the first insertion cavity together, and the compression neck is tightened. The second signal transmission line and the second conductor are clustered and inserted into the second insertion cavity together, and the compression neck is tightened. The ground wire, the first conductor and the third conductor are clustered and inserted into the third insertion cavity together, and the compression neck is tightened.
[0007] As a further improvement of the technical solution disclosed in the present invention, the second temperature measuring component also includes a second conductive copper sleeve. The second conductive copper sleeve is a pseudo-frequency decoration, which is also rooted in the plastic insulator and has an exposed end. The first conductive copper sleeve and the second conductive copper sleeve are respectively arranged on both sides of the ground wire plug and are symmetrical.
[0008] As a further improvement of the technical solution disclosed in the present invention, the exposed lengths of the first conductive copper sleeve and the second conductive copper sleeve are consistent, both controlled at 0.15-0.2 mm.
[0009] As a further improvement of the technical solution disclosed in the present invention, in a laboratory environment, the outer jacket withstand voltage test: AC3500 -0 +100 V / 1S; Inter-electrode withstand voltage test: AC2500 -0 +100 V / 1S; Insulation test: DC500V / 1S.
[0010] By adopting the above technical solution, the temperature-controlled national standard plug line has two independent temperature measurement circuits, namely the first temperature measurement circuit and the second temperature measurement circuit. The first temperature measurement circuit mainly consists of a thermistor for directly measuring the real-time temperature of the plastic insulator, a first wire for grounding the thermistor, and a first signal transmission line for transmitting temperature parameters with the power control box. The second temperature measurement circuit mainly consists of a current sensing resistor for indirectly measuring the real-time temperature of the socket panel, a first conductive copper sleeve that contacts the temperature-sensitive column of the socket panel, a second wire for electrically connecting the current sensing resistor and the first conductive copper sleeve, a second signal transmission line for transmitting temperature parameters with the power control box, and a third wire for grounding the current sensing resistor.
[0011] In practical applications, the temperature-controlled national standard plug wire disclosed in the present invention can at least achieve the following beneficial technical effects, specifically: the resistance of the thermistor is closely related to the ambient temperature, which is equivalent to a temperature sensor. The thermistor can sense the real-time temperature changes of the plastic insulator. At the same time, as the temperature of the socket panel increases, the temperature-sensitive column rooted therein can give an electrical signal change with the temperature change. The resistance of the current sensing resistor changes with the change of the current of the temperature-sensitive column of the socket panel. The current sensing resistor can indirectly sense the real-time temperature changes of the socket panel. In actual applications, when the actual measured temperature of the plastic insulator and the actual measured temperature of the socket panel exceed the preset threshold, the thermistor or current sensing resistor immediately transmits a resistance signal to the power control box to adjust the current and voltage supplied to the national standard plug line, or even cut off the power supply, which means an instantaneous drop in heating power, thereby preventing the national standard plug line or the socket panel from burning due to excessive heating. In this way, not only can the safety of the use of temperature-controlled national standard plug lines and socket panels be improved, and their service life be greatly improved, but also the reliability and safety of the charging operation process for large-function electrical appliances or electrical equipment can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0013] Figure 1 It is a structural schematic diagram of the first embodiment of the temperature-controlled national standard plug wire disclosed in the present invention.
[0014] Figure 2 It is a three-dimensional schematic diagram of the first embodiment of the temperature-controlled national standard plug wire disclosed in the present invention (with the plastic insulator and the insulating plastic sleeve hidden).
[0015] Figure 3 It is a front view of a three-pole plug in a first embodiment of the temperature-controlled national standard plug wire disclosed in the present invention.
[0016] Figure 4 It is a three-dimensional schematic diagram of the second embodiment of the temperature-controlled national standard plug wire disclosed in the present invention (with the plastic insulator and the insulating plastic sleeve hidden).
[0017] Figure 5 It is a front view of a three-pole plug in a second embodiment of the temperature-controlled national standard plug wire disclosed in the present invention.
[0018] Figure 6 This is a physical picture of a charging socket that is compatible with a certain temperature-controlled national standard plug line in the prior art.
[0019] 1-three-pole plug; 11-plastic insulator; 12-live wire plug; 13-neutral wire plug; 14-ground wire plug; 15-first temperature measuring component; 151-thermistor; 152-first wire; 153-first signal transmission line; 16-second temperature measuring component; 161-current sensing resistor; 162-first conductive copper sleeve; 163-second wire; 164-third wire; 165-second signal transmission line; 166-second conductive copper sleeve; 2-cable; 21-cable core; 211-live wire; 212-neutral wire; 213-ground wire; 22-insulating plastic sleeve. DETAILED DESCRIPTION
[0020] Three-core plug cables are usually used in high-power power supply situations. For example, when charging new energy vehicles, a three-core plug cable is used to connect to the socket panel of the charging pile, and a power control box is provided to control the charging current and charging voltage. In the fast charging scenario, the high charging current reaches 150-400A, and the vehicle battery can be fully charged in a short time.
[0021] The present invention will be further described in detail below with reference to specific embodiments. Figure 1 The schematic diagram of the structure of the first embodiment of the temperature-controlled national standard plug wire disclosed in the present invention shows that it is formed by connecting 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 wrapped by the insulating plastic sheath 22 to be isolated from the external environment.
[0022] Combination Figure 1 , 2 As shown in FIG, the cable core 21 is formed by a bundle of three parallel live wires 211, a neutral wire 212 and a ground wire 213. Figure 2 , 3As shown in the figure, the three-pole plug 1 is mainly assembled from several parts such as a plastic insulator 11, a live wire plug 12, a neutral wire plug 13 and a ground wire plug 14. The live wire plug 12, the neutral wire plug 13 and the ground wire plug 14 are all rooted and fixed in the plastic insulator 11, and their tail ends are electrically connected to the live wire 211, the neutral wire 212 and the ground wire 213 respectively.
[0023] Depend on Figure 2 It can also be clearly seen from the figure that the three-pole plug 1 is equipped with a first temperature measuring component 15 and a second temperature measuring component 16. Among them, the first temperature measuring component 15 is used to directly monitor the real-time temperature change of the plastic insulator, and the second temperature measuring component 16 is used to indirectly monitor the actual temperature change of the socket panel, and the temperature measurement processes of the two are independent of each other. The first temperature measuring component 15 includes a thermistor 151 and a first wire 152. The thermistor 151 is hidden in the plastic insulator 11, and it is electrically connected to the ground wire plug 14 with the help of the first wire 152. The second temperature measuring component 16 includes a current sensing resistor 161, a first conductive copper sleeve 162, a second wire 163 and a third wire 164. The first conductive copper sleeve 162 is rooted in the plastic insulator 11, and the end is exposed to facilitate the top contact and electrical conduction with the temperature-sensitive column of the socket panel. The two ends of the current sensing resistor 161 are electrically connected to the first conductive copper sleeve 162 and the grounding plug 14 by means of the second conductive wire 163 and the third conductive wire 164 .
[0024] The power supply system that supplies power to the temperature-controlled national standard plug line is equipped with a power control box (not shown in the figure). Furthermore, when the temperature value sensed by the thermistor 151 and the current sensing resistor 161 exceeds the preset threshold requirement, the temperature parameters can be transmitted to the power control box in real time. As a further optimization of the above technical solution, Figure 2 As shown in , the first temperature measuring component 15 is further provided with a first signal transmission line 153. The first signal transmission line 153 is used to transmit the temperature parameter of the plastic insulator 11 monitored by the thermistor 151 to the power control box in real time, and it is electrically connected with the thermistor 151. The second temperature measuring component 16 is further provided with a second signal transmission line 165. The second signal transmission line 165 is used to transmit the temperature parameter of the socket panel monitored by the current sensing resistor 161 to the power control box in real time, and it is electrically connected with the current sensing resistor 161. When any one of the temperature parameter of the plastic insulator 11 and the temperature parameter of the socket panel reaches the temperature threshold, under the intervention of the power control box, the power supply current of the cable core 21 drops instantaneously.
[0025] As can be seen from the above description, the newly developed temperature-controlled national standard plug line has two independent temperature measurement circuits, namely the first temperature measurement circuit (the main body is the above-mentioned first temperature measurement component 15) and the second temperature measurement circuit (the main body is the above-mentioned second temperature measurement component 16). The first temperature measurement circuit mainly consists of a thermistor 151 for directly measuring the real-time temperature of the plastic insulator 11, a first wire 152 for grounding the thermistor 151, and a first signal transmission line 153 for transmitting temperature parameters with the power control box. The second temperature measurement circuit mainly consists of a current sensing resistor 161 for indirectly measuring the real-time temperature of the socket panel, a first conductive copper sleeve 162 that contacts the temperature-sensitive column of the socket panel, a second wire 163 for electrically connecting the current sensing resistor 161 and the first conductive copper sleeve 162, a third wire 164 for grounding the current sensing resistor 161, and a second signal transmission line 165 for transmitting temperature parameters with the power control box.
[0026] In practical applications, the temperature-controlled national standard plug wire disclosed in the present invention has achieved the following beneficial technical effects, specifically: the resistance value of the thermistor 151 is closely related to the ambient temperature, which is equivalent to a temperature sensor. The thermistor 151 can sense the real-time temperature change of the plastic insulator 11. At the same time, as the temperature of the socket panel increases, the temperature-sensitive column (such as Figure 6 ) can give electrical signal changes with temperature changes. The resistance value of the current sensing resistor 161 changes with the current of the temperature-sensitive column of the socket panel. The current sensing resistor 161 can indirectly sense the real-time temperature changes of the socket panel. In practical applications, when the actual measured temperature of the plastic insulator 11 and the actual measured temperature of the socket panel exceed the preset threshold, the thermistor 151 or the current sensing resistor 161 immediately transmits the resistance signal to the power control box, adjusts the current and voltage of the national standard plug line, or even cuts off the power supply, which means an instantaneous decrease in heating power, avoiding the occurrence of burning of the national standard plug line or the socket panel due to excessive heating. In this way, not only can the safety of the use of the temperature-controlled national standard plug line and the socket panel be improved, and their service life can be greatly improved, but also the reliability and safety of the charging operation process for large-function electrical appliances or electrical equipment can be guaranteed.
[0027] As is known, the live wire 211, the neutral wire 212, the ground wire 213, the first wire 152, the second wire 163 and the third wire 164 can adopt a variety of design structures to achieve electrical conduction. However, an implementation scheme is recommended here that is easy to implement, does not require soldering, has high electrical conduction stability, and has a relatively small contact resistance value, specifically: Figure 2As shown in , the tail end of the thermistor 151 is formed with a first insertion cavity. The tail end of the first conductive copper sleeve 162 is formed with a second insertion cavity. The tail end of the ground wire plug 14 is formed with a third insertion cavity. The first signal transmission line 153 and the first wire 152 are clustered and inserted into the first insertion cavity together, and the compression neck is tightened. The second signal transmission line 165 and the second wire 163 are clustered and inserted into the second insertion cavity together, and the compression neck is tightened. The ground wire 213, the first wire 152 and the third wire 164 are clustered and inserted into the third insertion cavity together, and the compression neck is tightened. In the process of preparing the temperature-controlled national standard plug wire, taking the electrical conduction method between the first conductive copper sleeve 162 and the second signal transmission line 165 and the second conductor 163 as an example, the second signal transmission line 165 and the second conductor 163 are firstly stripped to expose a sufficient length of each metal conductor, and then the two are bundled to be inserted into the second insertion cavity. Subsequently, a clamping force is applied to the circumferential side wall of the second insertion cavity until the second insertion cavity undergoes a "necking" deformation, so that the second signal transmission line 165 and the second conductor 163 are stably clamped, and the first conductive copper sleeve 162 achieves good electrical conduction with the second signal transmission line 165 and the second conductor 163.
[0028] Under the premise of not significantly increasing the difficulty of injection molding and manufacturing cost of the plastic insulator 11, in order to ensure that the first conductive copper sleeve 162 can achieve good top contact and electrical conduction with the temperature-sensitive column of the socket panel, the exposed length of the first conductive copper sleeve 162 is consistent and controlled at 0.15-0.2 mm.
[0029] Figure 4 The figure shows a three-dimensional schematic diagram of the second embodiment of the temperature-controlled national standard plug wire disclosed in the present invention. The difference between the second temperature measuring component 16 and the first embodiment is that the second conductive copper sleeve 166 is added to the second temperature measuring component 16. The second conductive copper sleeve 166 is a pseudo-frequency decoration, which is also rooted in the plastic insulator 11, and the end is exposed and maintained at the same height as the first conductive copper sleeve 162. The first conductive copper sleeve 162 and the second conductive copper sleeve 166 are respectively arranged on both sides of the ground wire plug 213, and are symmetrical (such as Figure 5 ).
[0030] Finally, it should be noted that in order to ensure that the temperature-controlled national standard plug wire has good electrical performance after preparation, and to ensure safe power supply in subsequent practical applications, it is necessary to conduct performance tests before formal packaging and storage. In the laboratory environment, the outer sheath withstand voltage test: AC3500 -0 +100 V / 1S; Inter-electrode withstand voltage test: AC2500 -0 +100 V / 1S; Insulation test: DC500V / 1S.
[0031] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A temperature-controlled national standard plug wire, which is connected by a three-pole plug and a cable; the cable is composed of a cable core and an insulating plastic sleeve; the cable core is wrapped by the insulating plastic sleeve to be isolated from the external environment; the cable core is bundled by three parallel live wires, a neutral wire and a ground wire; the three-pole plug includes a plastic insulator, a live wire plug, a neutral wire plug and a ground wire plug; the live wire plug, the neutral wire plug and the ground wire plug are all rooted and fixed in the plastic insulator, and their tail ends are electrically connected with the live wire, the neutral wire and the ground wire respectively in a one-to-one correspondence. It is characterized in that The three-pole plug also includes a first temperature measuring component and a second temperature measuring component; the first temperature measuring component is used to directly monitor the real-time temperature change of the plastic insulator, and includes a thermistor and a first wire; the thermistor is hidden in the plastic insulator, and is electrically connected to the ground wire plug by means of the first wire; the second temperature measuring component is used to indirectly monitor the actual temperature change of the socket panel, and includes a current sensing resistor, a first conductive copper sleeve, a second wire and a third wire; The first conductive copper sleeve is rooted in the plastic insulator, and the end thereof is exposed; The two ends of the current sensing resistor are electrically connected to the first conductive copper sleeve and the ground wire plug at the same time by means of the second conductive wire and the third conductive wire respectively.
2. According to claim 1, the temperature-controlled national standard plug wire, Features , the power supply system that supplies electric energy to the temperature-controlled national standard plug line is equipped with a power control box; the first temperature measuring component also includes a first signal transmission line; the first signal transmission line is used to transmit the temperature parameter of the plastic insulator monitored by the thermistor to the power control box in real time, and it is electrically connected to the thermistor; the second temperature measuring component also includes a second signal transmission line; the second signal transmission line is used to transmit the socket panel temperature parameter monitored by the current sensing resistor to the power control box in real time, and it is electrically connected to the current sensing resistor; when any one of the plastic insulator temperature parameter and the socket panel temperature parameter reaches the temperature threshold, under the intervention of the power control box, the power supply current of the cable core drops instantaneously.
3. According to claim 2, the temperature-controlled national standard plug wire, Features The tail end of the thermistor is formed with a first insertion cavity; the tail end of the first conductive copper sleeve is formed with a second insertion cavity; the tail end of the ground wire plug is formed with a third insertion cavity; the first signal transmission line and the first conductor are clustered and inserted into the first insertion cavity together, and the compression neck is tightened; the second signal transmission line and the second conductor are clustered and inserted into the second insertion cavity together, and the compression neck is tightened; the ground wire, the first conductor and the third conductor are clustered and inserted into the third insertion cavity together, and the compression neck is tightened.
4. The temperature-controlled national standard plug wire according to any one of claims 1 to 3, Features The second temperature measuring component also includes a second conductive copper sleeve; the second conductive copper sleeve is a false frequency decoration, which is also rooted in the plastic insulator and the end is exposed; the first conductive copper sleeve and the second conductive copper sleeve are respectively arranged on both sides of the ground wire plug and are symmetrical.
5. According to claim 4, the temperature-controlled national standard plug wire, Features The exposed lengths of the first conductive copper sleeve and the second conductive copper sleeve are consistent, both controlled at 0.15 to 0.2 mm.
6. The temperature-controlled national standard plug wire according to any one of claims 1 to 3, Features ,In laboratory environment, outer jacket withstand voltage test: AC3500 -0 +100 V / 1S; Inter-electrode withstand voltage test: AC2500 -0 +100 V / 1S; Insulation test: DC500V / 1S.