Electrical connection device

Abstract

The utility model discloses a kind of electric connection equipment, including shell, power cord and circuit board located in shell interior;Shell includes upper shell body and lower shell body;Power cord is inserted into the interior of shell from one end of shell, and power cord includes first current-carrying wire and second current-carrying wire;Power module and detection module are provided on circuit board;Power module is located on the side of circuit board close to power cord insertion, and detection module is located on the side of circuit board away from power cord insertion;Upper shell body is provided with first positioning structure and second positioning structure, first positioning structure and the edge of upper shell body form first wire slot for placing first current-carrying wire between, and second positioning structure and the edge of upper shell body form second wire slot for placing second current-carrying wire between;First wire slot and second wire slot are located on the two sides of power module respectively.Can properly set the wire of current-carrying wire in power cord, avoid current-carrying wire and other components contact, effectively improve the reliability of electric connection equipment.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, and in particular to an electrical connection device. Background Technology

[0002] A leakage circuit breaker (LCDI) is a power connection device for electrical appliances. It detects leakage current in the power supply line via a leakage current detection line and disconnects the power supply to the appliance when a certain leakage current is detected, ensuring safe operation. In recent years, LCDIs have faced higher safety detection requirements beyond simply detecting leakage current in the power supply line via the leakage current detection line. For example, they need to detect whether the leakage current detection line is open-circuited. Utility Model Content

[0003] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide an electrical connection device that can properly set the routing of the current-carrying wires in the power line, avoid the current-carrying wires from contacting other components, and effectively improve the reliability of the electrical connection device.

[0004] In a first aspect, the present invention provides an electrical connection device, including a housing, a power cord, and a circuit board located inside the housing; The outer casing includes an upper casing and a lower casing; The power cord extends from one end of the housing into the interior of the housing, and the power cord includes a first current-carrying line and a second current-carrying line; The circuit board is electrically connected to the first current-carrying line and the second current-carrying line. The circuit board is provided with a power module and a detection module including a tripping device. in: The power module is located on the side of the circuit board near where the power line extends, and the detection module is located on the side of the circuit board away from where the power line extends. The upper housing is provided with a first positioning structure and a second positioning structure. A first wiring groove for placing the first current-carrying line is formed between the first positioning structure and the edge of the upper housing, and a second wiring groove for placing the second current-carrying line is formed between the second positioning structure and the edge of the upper housing. The first wiring groove and the second wiring groove are respectively located on both sides of the power module.

[0005] The electrical connection device provided according to the embodiments of this utility model has at least the following beneficial effects: by setting the power module on the side near where the power line extends and setting the detection module on the side away from where the power line extends on the circuit board, and by setting the first positioning structure and the second positioning structure on the upper housing, a first wiring groove for placing the first current-carrying line and a second wiring groove for placing the second current-carrying line are defined. The first wiring groove and the second wiring groove are respectively located on both sides of the transformer, so that the first current-carrying line and the second current-carrying line of the power line are limited to running from both sides of the power module. Moreover, the wiring groove is defined by the positioning structure and the edge of the upper housing, that is, the current-carrying line runs along the edge of the upper housing, reducing the possibility of contact with other components. The first positioning structure and the second positioning structure also further serve to isolate the first current-carrying line and the second current-carrying line. Therefore, the electrical connection device can properly set the routing of the current-carrying line in the power line, avoid the current-carrying line from contacting other components, and effectively improve the reliability of the electrical connection device.

[0006] According to some embodiments of the present invention, the power supply module includes a transformer and a varistor located between the transformer and the tripping device.

[0007] According to some embodiments of the present invention, the power supply module includes an output electrolytic capacitor located in the area of ​​the circuit board corresponding to the first trace groove; the electrical connection device further includes a first partition located between the output electrolytic capacitor and the first current-carrying line.

[0008] According to some embodiments of the present invention, in the electrical connection device, the first partition extends from the housing of the tripping device and is parallel to the circuit board.

[0009] According to some embodiments of the present invention, the first positioning structure is a second partition plate that is perpendicular to the circuit board and parallel to the edge of the upper housing.

[0010] According to some embodiments of the present invention, the electrical connection device provided has a second positioning structure consisting of a plurality of positioning posts.

[0011] According to some embodiments of the present invention, the power cord further includes a third current-carrying line serving as a ground wire, and the third current-carrying line is placed together with the first current-carrying line in the first wiring trough.

[0012] According to some embodiments of the present invention, the power supply line further includes a first shielding conductor covering the first current-carrying line and a second shielding conductor covering the second current-carrying line; the power module is used to output a DC detection voltage; the detection module includes a self-test path module and a response processing module. The self-test path module is electrically connected to the first shielding conductor, the second shielding conductor, and the output terminal of the power module, respectively. The response processing module is electrically connected to the first current-carrying line, the second current-carrying line, and the self-test path module, respectively, and is used to disconnect the power connection between the input and output terminals of the power line when the first shielding conductor is open-circuited, the second shielding conductor is open-circuited, the first shielding conductor detects a leakage current signal, and / or the second shielding conductor detects a leakage current signal.

[0013] According to some embodiments of the present invention, the detection module further includes a power failure detection module, which is electrically connected to the response processing module and the output terminal of the power module, respectively, and is used to trigger the response processing module to disconnect the power connection between the input and output terminals of the power line when the DC detection voltage output by the power module fails.

[0014] According to some embodiments of the present invention, the electrical connection device includes a fault signal processing module and a triggering module; The fault signal processing module is electrically connected to the self-test path module and is used to acquire the open circuit signal generated when the first shielding conductor and / or the second shielding conductor is open, and to acquire the leakage current signal detected by the first shielding conductor and / or the second shielding conductor, and to output the first trip trigger signal in response to the open circuit signal or the leakage current signal. The trigger module is electrically connected to the fault signal processing module, the first current-carrying line and the second current-carrying line respectively. The trigger module is configured to disconnect the power connection between the input and output terminals of the power line through the switch module in response to receiving the first trip trigger signal.

[0015] According to some embodiments of the present invention, the detection module further includes a drive enhancement module, which is electrically connected to the fault signal processing module and the trigger module respectively, and is used to increase the drive current of the trigger module when the fault signal processing module outputs the first trip trigger signal.

[0016] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this utility model to explain the technical solution of this utility model, and do not constitute a limitation on the technical solution of this utility model.

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a schematic diagram of the overall structure of the electrical connection device provided in this embodiment of the utility model; Figure 2 This is a schematic diagram of the upper housing of the electrical connection device provided in this embodiment of the utility model; Figure 3 This is a schematic diagram of the lower housing and power cord of the electrical connection device provided in this embodiment of the utility model; Figure 4 This is a circuit diagram of the detection module of the electrical connection device provided in this embodiment of the utility model; Figure 5 This is a circuit diagram of the power supply module of the electrical connection device provided in this embodiment of the utility model. Detailed Implementation

[0019] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0020] In the description of the embodiments of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number, "above," "below," "within," etc. are understood to include the stated number, "at least one" refers to one or more, "at least one of the following" and similar expressions refer to any combination of these items, including any combination of single or multiple items. If "first," "second," etc. are mentioned in the description, they are only used for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0021] It should be noted that the terms "setting," "installing," and "connecting" in the embodiments of this utility model should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of the above terms in the embodiments of this utility model in conjunction with the specific content of the technical solution. For example, the term "connection" can be a mechanical connection, an electrical connection, or a connection that allows for mutual communication; it can be a direct connection or an indirect connection through an intermediate medium.

[0022] It should be noted that the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0023] A leakage circuit breaker (LCDI) is a power connection device for electrical appliances. It detects leakage current in the power supply line via a leakage current detection line and disconnects the power supply to the appliance when a certain leakage current is detected, ensuring safe operation. In recent years, LCDIs have faced higher safety detection requirements beyond simply detecting leakage current in the power supply line via the leakage current detection line. For example, they need to detect whether the leakage current detection line is open-circuited.

[0024] Based on this, the present invention provides an electrical connection device that can properly arrange the routing of current-carrying lines in the power cord, avoid contact between current-carrying lines and other components, and effectively improve the reliability of the electrical connection device.

[0025] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of the overall structure of the electrical connection device provided in this embodiment of the utility model; Figure 2 This is a schematic diagram of the upper housing of the electrical connection device provided in this embodiment of the utility model; Figure 3 This is a schematic diagram of the lower housing and power cord of the electrical connection device provided in this embodiment of the utility model.

[0027] Reference Figures 1 to 3 This utility model provides an electrical connection device, including a housing 900, a power cord 100, and a circuit board PCB located inside the housing 900; the housing 900 includes an upper housing 910 and a lower housing 920.

[0028] The power cord 100 extends into the interior of the housing 900 from one end. The power cord 100 includes a first current-carrying wire 110 and a second current-carrying wire 120. It can be understood that when the power cord 100 supplies power to electrical equipment using two-phase AC power, it can be in one of the following two situations: the first current-carrying wire 110 is the live wire L, and the second current-carrying wire 120 is the neutral wire N; or the first current-carrying wire 110 is the neutral wire N, and the second current-carrying wire 120 is the live wire L. When the power cord 100 supplies power to electrical equipment using three-phase AC power, it can be in one of the following three situations: the first current-carrying wire 110 is the live wire L1, and the second current-carrying wire 120 is the neutral wire N; the first current-carrying wire 110 is the neutral wire N, and the second current-carrying wire 120 is the live wire L1; or the first current-carrying wire 110 is the live wire L1, and the second current-carrying wire 120 is the live wire L2. The following explanation will be based on the case where the first current-carrying line 110 is the live wire L and the second current-carrying line 120 is the neutral wire N. The other cases can be explained in the same way.

[0029] The circuit board (PCB) is electrically connected to the first current-carrying line 110 and the second current-carrying line 120. The PCB is equipped with a power module 200 including a transformer TR1 and a detection module including a tripping device TK. Specifically, the power module 200 is located on the PCB near the side where the power line 100 extends, i.e. Figure 3 The detection module is located on the right side of the PCB board, away from the side where the power line 100 extends. Figure 3 The left-hand area shown; refer to Figure 2 The upper housing 910 is provided with a first positioning structure 911 and a second positioning structure 912. A first wiring groove 913 for placing a first current-carrying line 110 is formed between the first positioning structure 911 and the edge of the upper housing 910, and a second wiring groove 914 for placing a second current-carrying line 120 is formed between the second positioning structure 912 and the edge of the upper housing 910; when Figure 2 The upper housing 910 is installed in Figure 3 After the lower housing 920, the first wiring groove 913 and the second wiring groove 914 are located on both sides of the transformer TR1, respectively.

[0030] According to the electrical connection device provided in this embodiment of the present invention, by placing the power module 200 on the side near where the power line 100 extends and the detection module on the side away from where the power line 100 extends on the circuit board PCB, and by providing a first positioning structure 911 and a second positioning structure 912 on the upper housing 910, a first wiring groove 913 for placing the first current-carrying line 110 and a second wiring groove 914 for placing the second current-carrying line 120 are defined. The first wiring groove 913 and the second wiring groove 914 are respectively located on both sides of the transformer TR1, so that the power line 100... The first current-carrying line 110 and the second current-carrying line 120 are limited to running from both sides of the transformer TR1, and the routing groove is defined by the positioning structure and the edge of the upper housing 910. That is, the current-carrying line runs along the edge of the upper housing 910, reducing the possibility of contact with other components. The first positioning structure 911 and the second positioning structure 912 further serve to isolate the first current-carrying line 110 and the second current-carrying line 120. Therefore, this electrical connection device can properly set the routing of the current-carrying line in the power line, avoid the current-carrying line from contacting other components, and effectively improve the reliability of the electrical connection device.

[0031] Reference Figure 3 In some embodiments of the electrical connection device provided by this utility model, the power module 200 further includes a varistor 201 located between the transformer TR1 and the tripping device TK. Exemplarily, the circuit structure of the power module 200 can be referred to... Figure 5 As shown, the second varistor ZR2 is... Figure 3 The corresponding varistor is 201. It can be understood that a varistor is a resistor with non-linear current-voltage characteristics, mainly used for voltage clamping when a circuit is subjected to overvoltage, absorbing excess current to protect sensitive components.

[0032] In this embodiment, the varistor 201 in the power module 200 is placed between the transformer TR1 and the tripping device TK, that is, the varistor 201 is placed at the boundary between the power module 200 and the detection module, which can effectively isolate the high-voltage area and the low-voltage area in the circuit board PCB, reduce the mutual interference between high voltage and low voltage, and improve the reliability of electrical connection equipment.

[0033] Reference Figure 3 In some embodiments of the electrical connection device provided by this utility model, the power module 200 includes an output electrolytic capacitor located in the area of ​​the circuit board PCB corresponding to the first trace 913; the electrical connection device also includes a first partition TK-1 located between the output electrolytic capacitor and the first current-carrying line 110. Exemplarily, the output electrolytic capacitor in the power module 200 is... Figure 5 The corresponding second electrolytic capacitor E2. Specifically, as shown... Figure 3As shown, the first partition TK-1 is located below the first current-carrying line 110, and the circuit board PCB is located below the first partition TK-1. The output electrolytic capacitor in the power module 200 is located on the circuit board PCB in the area corresponding to the first partition TK-1, that is, the output electrolytic capacitor is located below the first partition TK-1. Figure 3 In the view shown, the output electrolytic capacitor is blocked by the first partition TK-1.

[0034] In this embodiment, the electrical connection device is provided with a first partition TK-1 to separate the output electrolytic capacitor in the power module 200 from the first current-carrying line 110, so as to avoid unnecessary contact between the first current-carrying line 110 and the output electrolytic capacitor and avoid short circuit.

[0035] Reference Figure 3 In some embodiments of the present invention, the electrical connection device provides a first partition TK-1 that extends from the housing of the tripping device TK and is parallel to the circuit board PCB.

[0036] In this embodiment, the first partition TK-1 is part of the tripping device TK and is integrally formed with the tripping device TK. This allows for better positioning of the first partition TK-1. The first partition TK-1 is parallel to the circuit board PCB, which can effectively divide the space for the output electrolytic capacitor and the first current-carrying line 110, thus preventing the output electrolytic capacitor or the first current-carrying line 110 from being subjected to unnecessary compression and deformation.

[0037] Reference Figure 2 In some embodiments of the electrical connection device provided by this utility model, the first positioning structure 911 is a second partition plate that is perpendicular to the circuit board PCB and parallel to the edge of the upper housing 910. Specifically, when Figure 2 The upper housing 910 is installed in Figure 3 After the lower housing 920, the second partition is located between the first current-carrying line 110 and the transformer TR1. That is, the first current-carrying line 110 and the transformer TR1 are located on both sides of the second partition. The second partition reliably isolates the first current-carrying line 110 and the transformer TR1, avoiding unnecessary contact between the first current-carrying line 110 and the transformer TR1, which could lead to a short circuit.

[0038] Reference Figure 2 In some embodiments of the present invention, the electrical connection device provided has a second positioning structure 912 consisting of a plurality of positioning posts.

[0039] Specifically, in this embodiment, three positioning posts are provided to restrict the routing of the second current-carrying line 120, so that the second current-carrying line 120 is restricted to be set close to the edge of the lower housing 920, so that there is a reliable gap between the second current-carrying line 120 and the transformer TR1.

[0040] Reference Figure 3 In some embodiments of the present invention, the power cord 100 further includes a third current-carrying line 150 as a ground wire, and the third current-carrying line 150 is placed together with the first current-carrying line 110 in the first wiring trough 913.

[0041] It is understood that in this embodiment, the second partition also isolates the third current-carrying line 150 from the transformer TR1, avoiding unnecessary contact between the third current-carrying line 150 and the transformer TR1 that could lead to a short circuit.

[0042] Reference Figure 4 In some embodiments of the electrical connection device provided by this utility model, the power cord 100 further includes a first shielding conductor 130 covering the first current-carrying line 110 and a second shielding conductor 140 covering the second current-carrying line 120. The first shielding conductor 130 is used to collect the leakage current signal of the first current-carrying line 110, and the second shielding conductor 140 is used to collect the leakage current signal of the second current-carrying line 120. The first shielding conductor 130 includes a first end a near the input end of the power cord 100 and a second end b near the output end of the power cord 100. The second shielding conductor 140 includes a fourth end d near the input end and a fifth end e near the output end.

[0043] Power module 200 is used to output a DC detection voltage of +18V. Figure 5 The specific circuit diagram of the power module 200 provided in one embodiment of this utility model is shown.

[0044] Reference Figure 4 The detection module includes a self-test path module 300 and a response processing module. The self-test path module 300 is electrically connected to the first shielding conductor 130, the second shielding conductor 140, and the output terminal of the power module 200, respectively. The response processing module is electrically connected to the first current-carrying line 110, the second current-carrying line 120, and the self-test path module 300, and is used to disconnect the power connection between the input and output terminals of the power line 100 in the event that the first shielding conductor 130 is open-circuited, the second shielding conductor 140 is open-circuited, the first shielding conductor 130 detects a leakage current signal, and / or the second shielding conductor 140 detects a leakage current signal.

[0045] Specifically, the response processing module includes a fault signal processing module 410 and a trigger module 420. The fault signal processing module 410 is electrically connected to the self-test path module 300 and is used to acquire the open circuit signal generated when the first shielded conductor 130 and / or the second shielded conductor 140 is open, as well as the leakage current signal detected by the first shielded conductor 130 and / or the second shielded conductor 140, and outputs a first trip trigger signal in response to the open circuit signal or the leakage current signal. The trigger module 420 is electrically connected to the fault signal processing module 410, the first current-carrying line 110 and the second current-carrying line 120, respectively. The trigger module 420 is configured to disconnect the power connection between the input and output terminals of the power line 100 through the switch module 1000 in response to receiving the first trip trigger signal.

[0046] In this embodiment, the first shielding conductor 130 covers the first current-carrying line 110, thereby enabling the collection of leakage current signals from the first current-carrying line 110. The second shielding conductor 140 covers the second current-carrying line 120, thereby enabling the collection of leakage current signals from the second current-carrying line 120. Based on this, under the action of the DC detection voltage +18V provided by the power module 200, the self-test path module 300, together with the first shielding conductor 130 and the second shielding conductor 140, forms an open-circuit self-test path. When leakage or open-circuit conditions occur, the fault signal processing module 410 outputs a first tripping trigger signal, causing the trigger module 420 to disconnect the power connection between the input and output terminals of the power line 100, ensuring the power supply safety of the power line.

[0047] Understandably, the electrical connection device also includes a switch module 1000 for controlling the power connection between the input and output terminals of the power supply line 100. (Refer to...) Figure 4 As shown, the switch module 1000 is provided with switch terminals on the first current-carrying line 110 and the second current-carrying line 120. When the switch terminals of the switch module 1000 are closed, the power connection between the input and output terminals of the power line 100 is made on; when the switch terminals of the switch module 1000 are open, the power connection between the input and output terminals of the power line 100 is disconnected.

[0048] Reference Figure 4 In some embodiments of the present invention, the electrical connection device provided includes a detection module further comprising a drive enhancement module 800, which is electrically connected to the fault signal processing module 410 and the trigger module 420 respectively, and is used to increase the drive current of the trigger module 420 when the fault signal processing module 410 outputs a first trip trigger signal.

[0049] In this embodiment, by providing a drive enhancement module 800, when the fault signal processing module 410 outputs the first trip trigger signal to the trigger module 420, the drive current of the trigger module 420 is increased, avoiding the risk of insufficient drive current causing the trip to fail normally, and thus improving the reliability of the detection and protection device.

[0050] Reference Figure 5 In some embodiments, the power module 200 includes a fuse FUSE, a second varistor ZR2, a seventeenth resistor R17, a seventh diode D7, an eighth diode D8, a first electrolytic capacitor E1, an eighteenth resistor R18, a fifth capacitor C5, a ninth diode D9, a nineteenth resistor R19, a transformer TR1, a voltage regulator chip U1, a tenth diode D10, an eleventh diode D11, a twentieth resistor R20, a sixth capacitor C6, a seventh capacitor C7, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fourth resistor R24, a twenty-fifth resistor R25, a second electrolytic capacitor E2, and an eighth capacitor C8; wherein the transformer TR1 includes a primary winding, an output winding, and a feedback winding.

[0051] Specifically, the first current-carrying line 110 is connected to one end of the fuse FUSE, and the other end of the fuse FUSE is connected to one end of the second varistor ZR2 and one end of the seventeenth resistor R17; the other end of the seventeenth resistor R17 is connected to the anode of the seventh diode D7, the cathode of the seventh diode D7 is connected to the anode of the eighth diode D8, the cathode of the eighth diode D8 is connected to one end of the first electrolytic capacitor E1, one end of the eighteenth resistor R18, one end of the fifth capacitor C5, and one end of the primary winding of the transformer TR1; the other end of the eighteenth resistor R18 is connected together with the other end of the fifth capacitor C5 and connected to the cathode of the ninth diode D9, the anode of the ninth diode D9 is connected to one end of the nineteenth resistor R19, and the other end of the nineteenth resistor R19 and the other end of the primary winding of the transformer TR1 are both connected to the drain terminal of the voltage regulating chip U1; One end of the output winding of transformer TR1 is connected to the anode of the tenth diode D10; the cathode of the tenth diode D10 is connected to one end of the second electrolytic capacitor E2 and one end of the eighth capacitor C8. One end of the feedback winding of transformer TR1 is connected to one end of the twentieth resistor R20, one end of the twenty-first resistor R21, and one end of the twenty-second resistor R22; the other end of the twentieth resistor R22 is connected to the anode of the eleventh diode D11, and the cathode of the eleventh diode D11 is connected to the VCC terminal of the voltage regulator chip U1, one end of the sixth capacitor C6, one end of the seventh capacitor C7, and one end of the twenty-fifth resistor R25; the other ends of the sixth capacitor C6, the seventh capacitor C7, and the twenty-fifth resistor R25 are connected to the GND terminal of the voltage regulator chip U1 and grounded; the other ends of the twenty-first resistor R21 and the twenty-second resistor R22 are connected to the FB terminal of the voltage regulator chip U1 and to one end of the twenty-third resistor R23; one end of the twenty-fourth resistor R24 ​​is connected to the ISEN terminal of the voltage regulator chip U1. The second current-carrying line 120 connects to the other end of the second varistor ZR2, the other end of the first electrolytic capacitor E1, the other end of the twenty-fourth resistor R24, the other end of the twenty-third resistor R23, the other end of the feedback winding of transformer TR1, the other end of the output winding of transformer TR1, the other end of the second electrolytic capacitor E2, and the other end of the eighth capacitor C8.

[0052] In the power module 200 provided in this embodiment, the input terminal, output terminal and feedback terminal are completely separated by the transformer TR1, and energy is transferred through coupling. There is no electrical connection between the output terminal and the feedback terminal.

[0053] Reference Figure 4 In some embodiments, the drive enhancement module 800 includes a fifth switch Q5, a twelfth resistor R12, and a thirteenth resistor R13. One end of the twelfth resistor R12 is electrically connected to the output terminal of the power supply module 200, and the other end of the twelfth resistor R12 is electrically connected to a switch pin of the fifth switch Q5. The output terminal of the fault signal processing module 410 is electrically connected to one end of the thirteenth resistor R13 and the control pin of the fifth switch Q5. The other end of the thirteenth resistor R13 and the other switch pin of the fifth switch Q5 are both electrically connected to the trigger module 420.

[0054] In this embodiment, when the fault signal processing module 410 outputs a first trip trigger signal, the control pin of the fifth switch Q5 receives the first trip trigger signal and is turned on. This generates a current flowing from the output of the power module 200 through the twelfth resistor R12 and the fifth switch Q5 to the trigger module 420. This increases the drive current of the trigger module 420, avoiding the risk of insufficient drive current leading to failure to trip normally, and improving the reliability of the detection protection device. Furthermore, the first trip trigger signal output by the fault signal processing module 410, after passing through the thirteenth resistor R13, converges with the drive current passing through the fifth switch Q5 and is then transmitted together to the trigger module 420.

[0055] Reference Figure 4 In some embodiments of the present invention, the electrical connection device includes a detection module that further includes a power failure detection module 500. The power failure detection module 500 is electrically connected to the response processing module and the output terminal of the power module 200, respectively. It is used to trigger the response processing module to disconnect the power connection between the input terminal and the output terminal of the power line 100 when the DC detection voltage +18V output by the power module 200 fails.

[0056] In this embodiment, by setting a power failure detection module 500 to detect the validity of the DC detection voltage +18V output by the power module 200, the power connection between the input and output terminals of the power line can be disconnected by the trigger module 420 in the response processing module when the DC detection voltage +18V output by the power module 200 fails, thereby improving the reliability of the detection and protection device.

[0057] Reference Figure 4 In some embodiments, the power failure detection module 500 includes a first switching transistor Q1, a voltage divider injection module 510 electrically connected between the first current-carrying line 110 and the second current-carrying line 120, and a voltage divider trigger module 520 electrically connected between the output terminal of the power module 200 and the second current-carrying line 120. The voltage divider injection module 510 is also electrically connected to the trigger module 420 to provide a second trip trigger signal to the trigger module 420 when the DC detection voltage +18V output by the power module 200 fails. The two switching pins of the first switching transistor Q1 are electrically connected to the voltage divider injection module 510 and the second current-carrying line 120, respectively. The voltage divider trigger module 520 is electrically connected to the control pin of the first switching transistor Q1 to control the first switching transistor Q1 to conduct when the DC detection voltage +18V output by the power module 200 is valid, so that the voltage divider injection module 510 cannot provide the second trip trigger signal to the trigger module 420.

[0058] In this embodiment, when the +18V DC detection voltage output by the power module 200 is valid, the voltage divider trigger module 520 divides the voltage difference between the output terminal of the power module 200 and the second current-carrying line 120, and provides a first-level voltage signal to the control pin of the first switch Q1, causing the first switch Q1 to conduct. The voltage divider injection module 510 is connected to the second current-carrying line 120 through the first switch Q1, thus preventing it from providing the second trip trigger signal to the trigger module 420. When the +18V DC detection voltage output by the power module 200 fails, the voltage divider trigger module 520 provides a 0V low-level voltage signal to the control pin of the first switch Q1, causing the first switch Q1 to turn off. The voltage divider injection module 510 is directly electrically connected between the first current-carrying line 110 and the second current-carrying line 120, and provides the second trip trigger signal to the trigger module 420, so that the trigger module 420 disconnects the power connection between the input and output terminals of the power line.

[0059] Reference Figure 4The voltage divider injection module 510 includes a first resistor R1, a twenty-sixth resistor R26, a second diode D2, a first diode D1, and a second resistor R2; the first current-carrying line 110, the first resistor R1, the twenty-sixth resistor R26, the second diode D2, the first diode D1, the second resistor R2, and the second current-carrying line 120 are electrically connected in sequence; the connection point between the second diode D2 and the first diode D1 is connected to the first switching transistor Q1; the connection point between the first diode D1 and the second resistor R2 is connected to the trigger module 420. When the first switch Q1 is turned off, ignoring the voltage drop of the first diode D1 and the second diode D2, the voltage difference between the first current-carrying line 110 and the second current-carrying line 120 is divided by the twenty-sixth resistor R26, the first resistor R1, and the second resistor R2 to obtain the second trip trigger signal. The second trip trigger signal is then output to the trigger module 420 from the connection point of the first diode D1 and the second resistor R2. When the first switch Q1 is turned on, the connection point of the second diode D2 and the first diode D1 is connected to the second current-carrying line 120 through the first switch Q1, forming a conduction loop of the first current-carrying line 110, the first resistor R1, the twenty-sixth resistor R26, the second diode D2, the first switch Q1, and the second current-carrying line 120. At this time, the connection point of the first diode D1 and the second resistor R2 cannot output the second trip trigger signal to the trigger module 420. Furthermore, by setting a first diode D1 and a second diode D2 in the voltage divider injection module 510, the conduction loop from the first current-carrying line 110 through the first resistor R1 and the first switch Q1 to the second current-carrying line 120, and the conduction loop from the first current-carrying line 110 through the first resistor R1, the first diode D1, and the second resistor R2 to the second current-carrying line 120, are only implemented in the half-cycle when the voltage amplitude of the first current-carrying line 110 is greater than that of the second current-carrying line 120; they are not conducted in the other half-cycle. It should be noted that in some embodiments, the trigger module 420 includes a sixth diode D6, and the second resistor R2 can be directly electrically connected to the second current-carrying line 120, or indirectly electrically connected to the second current-carrying line 120 through the sixth diode D6 in the trigger module 420.

[0060] Reference Figure 4 In some embodiments, the voltage divider trigger module 520 includes a third resistor R3 and a fourth resistor R4. The output terminal of the power module 200, the third resistor R3, the fourth resistor R4, and the second current-carrying line 120 are electrically connected in sequence. The connection point of the third resistor R3 and the fourth resistor R4 is connected to the control pin of the first switching transistor Q1.

[0061] In this embodiment, the voltage divider trigger module 520 divides the voltage difference between the output terminal of the power module 200 and the second current-carrying line 120 by using a third resistor R3 and a fourth resistor R4 connected in series. This allows it to provide a first-level voltage signal to the control pin of the first switch Q1 when the DC detection voltage +18V output by the power module 200 is valid, thereby turning on the first switch Q1. Conversely, it provides a 0-volt low-level voltage signal to the control pin of the first switch Q1 when the DC detection voltage +18V output by the power module 200 is invalid, thereby turning off the first switch Q1.

[0062] Reference Figure 4 In some embodiments, the voltage divider injection module 510 further includes a first capacitor C1 and a second capacitor C2. The first capacitor C1 is connected in parallel with the second resistor R2, and the two ends of the second capacitor C2 are respectively connected to the two switching pins of the first switching transistor Q1.

[0063] In this embodiment, by setting a first capacitor C1 connected in parallel with the second resistor R2 and a second capacitor C2 connected in parallel with the two switch pins of the first switch Q1 in the voltage divider injection module 510, the power-on soft start function is realized. This allows the first capacitor C1 and the second capacitor C2 to be charged when the detection and protection device is powered on, before the power module 200 has established the DC detection voltage +18V output. The charging voltage will not exceed the tripping voltage of the trigger module 420, and no false tripping phenomenon will occur upon power-on. It should be noted that it may take some time for the power module 200 to establish a DC detection voltage of +18V. If the power module 200 has not yet established a DC detection voltage of +18V at the moment the detection and protection device is powered on, the voltage divider trigger module 520 provides a low-level voltage signal of 0V to the control pin of the first switching transistor Q1, causing the first switching transistor Q1 to turn off. At this time, if there is no first capacitor C1 and second capacitor C2, a conducting loop will be directly formed between the first current-carrying line 110, the first resistor R1, the first diode D1, the second resistor R2, and the second current-carrying line 120, causing the trigger module 420 to disconnect the power connection between the input and output terminals of the power line, resulting in a false tripping phenomenon upon power-on.

[0064] Reference Figure 4 In some embodiments, the self-test path module 300 includes a first self-test unit 310, a second self-test unit 320, and a third self-test unit 330; the first self-test unit 310 is electrically connected between the output terminal of the power module 200 and the second current-carrying line 120, and is provided with a first detection terminal X; the second self-test unit 320 is electrically connected to the first self-test unit 310, the first terminal a, and the third terminal d, and is provided with a second detection terminal Y; the third self-test unit 330 is electrically connected to the second terminal b, the fourth terminal e, and the second current-carrying line 120; the fault signal processing module 410 is electrically connected to the first detection terminal X and the second detection terminal Y, respectively.

[0065] In this embodiment, the first self-test unit 310, the second self-test unit 320, and the third self-test unit 330 in the self-test path module 300, together with the first shielding conductor 130 and the second shielding conductor 140, form an open-circuit self-test path, and are provided with a first detection terminal X and a second detection terminal Y. When there is no leakage or open circuit, the potentials of the first detection terminal X and the second detection terminal Y are constant, and the fault signal processing module 410 will not be triggered to output a first trip trigger signal to the trigger module 420. When leakage or open circuit occurs, the potentials of the first detection terminal X and the second detection terminal Y change, which will trigger the fault signal processing module 410 to output a first trip trigger signal, thereby disconnecting the power connection between the input and output terminals of the power line through the trigger module 420, ensuring the power supply safety of the power line. This power line detection and protection device can effectively and reliably realize leakage detection of the power line and open circuit detection of the shielding conductor of the power line.

[0066] Reference Figure 4 In some embodiments, the first self-test unit 310 includes a third diode D3, a fifth resistor R5, and a sixth resistor R6. The output terminal of the power module 200, the third diode D3, the fifth resistor R5, the sixth resistor R6, and the second current-carrying line 120 are electrically connected in sequence. The connection point of the fifth resistor R5 and the sixth resistor R6 serves as the first detection terminal X.

[0067] In this embodiment, the voltage between the output terminal of the power module 200 and the second current-carrying line 120 is divided by the third diode D3, the fifth resistor R5 and the sixth resistor R6 in the first self-test unit 310 to determine the potential of the first detection terminal X.

[0068] It should be noted that the electrical connection between the output terminal of the power module 200 and the twelfth resistor R12 can be achieved through either a direct connection or an indirect connection. For example, an indirect connection can be achieved by referring to... Figure 4 As shown, the output terminal of the power module 200 is connected to the anode of the third diode D3, and the cathode of the third diode D3 is connected to the twelfth resistor R12. That is, the output terminal of the power module 200 is indirectly connected to the twelfth resistor R12 through the third diode D3.

[0069] Reference Figure 4 In some embodiments, the second self-test unit 320 includes a seventh resistor R7, the connection point of the third diode D3 and the fifth resistor R5 is connected to one end of the seventh resistor R7, and the other end of the seventh resistor R7, the first end a and the third end d are connected together as the second detection end Y. It is understood that in some embodiments, the second self-test unit 320 may also include a fourth capacitor C4, with its two ends connected to the first detection end X and the second detection end Y, respectively.

[0070] Reference Figure 4 In some embodiments, the third self-test unit 330 includes a ninth resistor R9, a tenth resistor R10, a fourth diode D4, and a fifth diode D5; the second terminal b, the ninth resistor R9, the fourth diode D4, and the second current-carrying line 120 are electrically connected in sequence; the fourth terminal e, the tenth resistor R10, the fifth diode D5, and the second current-carrying line 120 are electrically connected in sequence.

[0071] In this embodiment, the seventh resistor R7 in the second self-test unit 320, the ninth resistor R9, the tenth resistor R10 in the third self-test unit 330, the fourth diode D4, and the fifth diode D5, together with the first shielding conductor 130 and the second shielding conductor 140, form a special detection path. This path enables the detection of the first shielding conductor 130 and the second shielding conductor 140, and determines the potential of the second detection terminal Y. This allows the potential of either the first detection terminal X or the second detection terminal Y to be affected when a leakage signal is detected in the first shielding conductor 130, the second shielding conductor 140, or both the first and second shielding conductors are open-circuited. This triggers the module 420 to disconnect the power connection between the input and output terminals of the power cord, ensuring the power supply safety of the power cord.

[0072] Reference Figure 4 In some embodiments, a test module 600 is also included in parallel with the seventh resistor R7. The test module 600 includes an eighth resistor R8 and a test switch TEST connected in series.

[0073] In this embodiment, when the test switch TEST in the test module 600 is pressed, it is equivalent to connecting the eighth resistor R8 in parallel across the seven resistor R7, thereby changing the potential of the second detection terminal Y, which causes the trigger module 420 to operate, and thus can test whether the leakage current detection function of the detection protection device is intact.

[0074] Reference Figure 4In some embodiments, the fault signal processing module 410 includes a second transistor Q2, a third transistor Q3, a fourteenth resistor R14, a fifteenth resistor R15, and a sixteenth resistor R16; the base of the second transistor Q2 and the emitter of the third transistor Q3 are both connected to the first detection terminal X; the emitter of the second transistor Q2 is connected to one end of the fourteenth resistor R14, the base of the third transistor Q3 is connected to one end of the fifteenth resistor R15, and the other ends of the fourteenth resistor R14 and the fifteenth resistor R15 are both connected to the second detection terminal Y; the collectors of the second transistor Q2 and the third transistor Q3 are connected together and connected to one end of the sixteenth resistor R16, and the other end of the sixteenth resistor R16 serves as the output terminal of the fault signal processing module 410, electrically connected to one end of the thirteenth resistor R13 and the control pin of the fifth switching transistor Q5.

[0075] In this embodiment, when the voltage received at the emitter of the second transistor Q2 is greater than the voltage received at the base of the second transistor Q2, the emitter junction of the second transistor Q2 is forward-biased and thus conducts, thereby outputting a first trip trigger signal to the trigger module 420 through the collector of the second transistor Q2; similarly, when the voltage received at the emitter of the third transistor Q3 is greater than the voltage received at the base of the third transistor Q3, the emitter junction of the third transistor Q3 is forward-biased and thus conducts, thereby outputting a first trip trigger signal to the trigger module 420 through the collector of the third transistor Q3.

[0076] Reference Figure 4 In some embodiments, the trigger module 420 includes a silicon controlled rectifier (SCR) Q4, a sixth diode D6, and a trip coil Lx for generating electromagnetic force to drive the switch module 1000 to disconnect the power connection. The first current-carrying line 110, the trip coil Lx, the SCR Q4, the sixth diode D6, and the second current-carrying line 120 are sequentially and electrically connected. The control pin of the SCR Q4 is electrically connected to the other end of the thirteenth resistor R13 and another switch pin of the fifth switch Q5. It is understood that... Figure 4 The trip coil Lx in the middle is Figure 3 The tripping device TK shown is a part of the tripping device TK, which includes not only the tripping coil Lx, but also other plastic housing support structures.

[0077] In this embodiment, when the first trip trigger signal is output from the collector of the second transistor Q2 or the collector of the third transistor Q3 and triggers the drive enhancement module 800 to increase the drive current of the trigger module 420, after the positive half-cycle of the AC power supply, that is, when the level of the first current-carrying line 110 is greater than the level of the second current-carrying line 120, the thyristor Q4 is turned on, forming a strong current path of the first current-carrying line 110-trip coil Lx-thyristor Q4-sixth diode D6-second current-carrying line 120; the trip coil Lx generates a strong electromagnetic force, thereby driving the switch module 1000 to disconnect the power connection between the input and output terminals of the power supply line.

[0078] It should also be noted that the electrical connection between the power failure detection module 500 and the trigger module 420 is as follows: the connection point of the first diode D1 and the second resistor R2 in the power failure detection module 500 is electrically connected to the control pin of the thyristor Q4, so that when the DC detection voltage +18V output by the power module 200 fails, a second trip trigger signal is provided to the trigger module 420.

[0079] Reference Figure 4 In some embodiments, the trigger module 420 further includes a first varistor ZR1 connected in parallel with the silicon controlled rectifier Q4. Connecting the first varistor ZR1 in parallel with the silicon controlled rectifier Q4 helps protect the silicon controlled rectifier Q4 from damage.

[0080] Reference Figure 4 In some embodiments, an indicator module 700 is also included. The indicator module 700 includes an eleventh resistor R11 and a light-emitting diode LED1. The output terminal of the power supply module 200, the eleventh resistor R11, the light-emitting diode LED1, and the second current-carrying line 120 are electrically connected in sequence.

[0081] In this embodiment, when the DC detection voltage +18V output by the power module 200 is valid, a conduction circuit is formed between the output terminal of the power module 200, the eleventh resistor R11, the light-emitting diode LED1, and the second current-carrying line 120, and the light-emitting diode LED1 is lit. Correspondingly, when the DC detection voltage +18V output by the power module 200 fails, the light-emitting diode LED1 is turned off, thereby prompting the user.

[0082] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An electrical connection device, characterized in that, include: The outer casing includes an upper casing and a lower casing; A power cord extends from one end of the housing into the interior of the housing, and the power cord includes a first current-carrying line and a second current-carrying line; A circuit board is located inside the housing and is electrically connected to the first current-carrying line and the second current-carrying line. The circuit board is provided with a power module and a detection module including a tripping device. in: The power module is located on the side of the circuit board near where the power line extends, and the detection module is located on the side of the circuit board away from where the power line extends. The upper housing is provided with a first positioning structure and a second positioning structure. A first wiring groove for placing the first current-carrying line is formed between the first positioning structure and the edge of the upper housing, and a second wiring groove for placing the second current-carrying line is formed between the second positioning structure and the edge of the upper housing. The first wiring groove and the second wiring groove are respectively located on both sides of the power module.

2. The electrical connection device according to claim 1, characterized in that, The power module includes a transformer and a varistor located between the transformer and the tripping device.

3. The electrical connection device according to claim 1, characterized in that, The power module includes an output electrolytic capacitor located in the area of ​​the circuit board corresponding to the first trace slot; the electrical connection device further includes a first partition located between the output electrolytic capacitor and the first current-carrying line.

4. The electrical connection device according to claim 3, characterized in that, The first partition extends from the housing of the tripping device and is parallel to the circuit board.

5. The electrical connection device according to claim 1, characterized in that, The first positioning structure is a second partition that is perpendicular to the circuit board and parallel to the edge of the upper housing.

6. The electrical connection device according to claim 1, characterized in that, The second positioning structure consists of several positioning posts.

7. The electrical connection device according to claim 1, characterized in that, The power line also includes a third current-carrying line as a ground wire, which is placed together with the first current-carrying line in the first wiring groove.

8. The electrical connection device according to claim 1, characterized in that, The power line further includes a first shielding conductor covering the first current-carrying line and a second shielding conductor covering the second current-carrying line. The power module is used to output a DC detection voltage. The detection module includes a self-test path module and a response processing module. The self-test path module is electrically connected to the first shielding conductor, the second shielding conductor, and the output terminal of the power module, respectively. The response processing module is electrically connected to the first current-carrying line, the second current-carrying line, and the self-test path module, respectively, and is used to disconnect the power connection between the input and output terminals of the power line when the first shielding conductor is open-circuited, the second shielding conductor is open-circuited, the first shielding conductor detects a leakage current signal, and / or the second shielding conductor detects a leakage current signal.

9. The electrical connection device according to claim 8, characterized in that, The detection module further includes a power failure detection module, which is electrically connected to the response processing module and the output terminal of the power module. The power failure detection module is used to trigger the response processing module to disconnect the power connection between the input and output terminals of the power line when the DC detection voltage output by the power module fails.

10. The electrical connection device according to claim 9, characterized in that, The response processing module includes a fault signal processing module and a triggering module; The fault signal processing module is electrically connected to the self-test path module and is used to acquire the open circuit signal generated when the first shielding conductor and / or the second shielding conductor is open, and to acquire the leakage current signal detected by the first shielding conductor and / or the second shielding conductor, and to output the first trip trigger signal in response to the open circuit signal or the leakage current signal. The trigger module is electrically connected to the fault signal processing module, the first current-carrying line and the second current-carrying line respectively. The trigger module is configured to disconnect the power connection between the input and output terminals of the power line through the switch module in response to receiving the first trip trigger signal.

11. The electrical connection device according to claim 10, characterized in that, The detection module further includes a drive enhancement module, which is electrically connected to the fault signal processing module and the trigger module, respectively, and is used to increase the drive current of the trigger module when the fault signal processing module outputs the first trip trigger signal.

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