CN-121985474-A - Circuit board of electric connection equipment and electric connection equipment

Abstract

The invention discloses a circuit board of electric connection equipment and the electric connection equipment, wherein the electric connection equipment comprises a power line and a detection protection device which is arranged on the circuit board and is electrically connected with the power line, the detection protection device comprises a self-checking current injection module, a manual detection module, a fault response module and a trigger module, the circuit board comprises a middle area, a first area, a second area, a third area and a fourth area, the first area is provided with a welding pad for welding the first current-carrying line, the second current-carrying line, the first shielding conductor structure and the second shielding conductor structure, and the self-checking current injection module and the manual detection module are arranged in the middle area of the circuit board. The space utilization of the circuit board can be improved, the size of the circuit board is reduced, wiring difficulty is reduced, and interference to electric signals transmitted on the circuit board is reduced.

Inventors

• WEI XIAOLEI
• Cen Junnuo
• XU MINGHUI

Assignees

• 广东美的制冷设备有限公司

Dates

Publication Date

20260505

Application Date

20250321

Priority Date

20241031

Claims (16)

1. 1. The circuit board of the electric connection equipment is characterized by comprising a power line and a detection protection device which is arranged on the circuit board and is electrically connected with the power line; The power line comprises a first current carrying line, a second current carrying line, a first shielding conductor structure coating the first current carrying line and a second shielding conductor structure coating the second current carrying line, and the first shielding conductor structure is connected with the second shielding conductor structure; The detection protection device comprises a self-checking current injection module, a manual detection module, a fault response module and a trigger module; The circuit board comprises a middle area, a first area, a second area, a third area and a fourth area, wherein the third area is arranged opposite to the first area, the fourth area is arranged opposite to the second area, the second area is respectively connected with one side of the first area and one side of the third area, the fourth area is respectively connected with the other side of the first area and the other side of the third area, and the middle area is surrounded by the first area, the second area, the third area and the fourth area; the first region is provided with a bonding pad for bonding the first current carrying wire, the second current carrying wire, the first shielding conductor structure and the second shielding conductor structure; The self-checking current injection module and the manual detection module are arranged in the middle area of the circuit board.
2. 2. The circuit board of claim 1, wherein the self-test current injection module is configured to inject a self-test current into the first shielding conductor structure or the second shielding conductor structure, wherein the manual detection module is configured to inject an analog leakage current into the first shielding conductor structure or the second shielding conductor structure, wherein the fault response module is configured to output a trip trigger signal when any one of a leakage signal detected by the first shielding conductor structure, a leakage signal detected by the second shielding conductor structure, an open circuit signal generated when the first shielding conductor structure or the second shielding conductor structure is opened, and the analog leakage current injected by the manual detection module is acquired, and wherein the trigger module is configured to disconnect an electrical connection between an input terminal and an output terminal of the power line according to the received trip trigger signal.
3. 3. The circuit board of claim 2, wherein the fault response module and the trigger module are disposed in the fourth region.
4. 4. The circuit board of claim 2, wherein the circuit board is provided with a first trace extending from the first region through the second and third regions in sequence and to the fourth region, and with a second trace extending from the middle region to the first region, the first trace being located at an edge of the circuit board.
5. 5. The circuit board of claim 4, wherein the circuit board is further configured to, The first area is provided with a first bonding pad for welding the first current-carrying wire and a second bonding pad for welding the second current-carrying wire, a third bonding pad for welding the first shielding conductor structure is arranged at a position, close to the second area, of the first area, and a fourth bonding pad for welding the second shielding conductor structure is arranged at a position, close to the fourth area, of the first area; The fault response module is adjacent to the fourth bonding pad, and one end of the fault response module is electrically connected with the fourth bonding pad; the trigger module is respectively and electrically connected with the first wiring and the fault response module; The self-checking current injection module is adjacent to the fourth bonding pad, one end of the self-checking current injection module is electrically connected with the fourth bonding pad, and the other end of the self-checking current injection module is electrically connected to the first bonding pad through the second wiring; The manual detection module is adjacent to the third bonding pad, and one end of the manual detection module is electrically connected with the third bonding pad.
6. 6. The circuit board of claim 5, wherein the manual detection module comprises a test switch and a first resistor, the second trace is provided with a first contact area for one end of the test switch to contact, the middle area of the circuit board is provided with a second contact area for the other end of the test switch to contact, the second contact area is adjacent to and electrically connected with one end of the first resistor, and the other end of the first resistor is adjacent to and electrically connected with the third bonding pad.
7. 7. The circuit board of claim 5, wherein the self-test current injection module comprises a second resistor, one end of the second resistor is adjacent to and electrically connected to the fourth pad, and the other end of the second resistor is electrically connected to the second trace.
8. 8. The circuit board of claim 5, wherein the detection protection device further comprises a first diode disposed in the first area, one end of the first diode is electrically connected to the first trace, and the other end of the first diode is electrically connected to the second trace.
9. 9. The circuit board of claim 5, wherein the detection protection device further comprises a third resistor disposed in the second region, one end of the third resistor is adjacent to and electrically connected to the third pad, and the other end of the third resistor is electrically connected to the first trace.
10. 10. The circuit board of claim 5, wherein the fault response module comprises a fourth resistor, a first capacitor, and a voltage regulator tube, one end of the fourth resistor, one end of the first capacitor, and one end of the voltage regulator tube are adjacent and electrically connected, the other end of the fourth resistor is adjacent and electrically connected to the fourth pad, and the other end of the first capacitor and the other end of the voltage regulator tube are both electrically connected to the trigger module.
11. 11. The circuit board of claim 10, wherein the trigger module comprises a fifth resistor, a second capacitor and a silicon controlled rectifier, wherein the other end of the first capacitor, one end of the fifth resistor, one end of the second capacitor and one switch pin of the silicon controlled rectifier are all electrically connected through the first wiring, a third wiring is further provided in the fourth area, and the other end of the voltage regulator tube, the other end of the fifth resistor, the other end of the second capacitor and the control pin of the silicon controlled rectifier are all electrically connected through the third wiring.
12. 12. The circuit board of claim 11, wherein the test protection device further comprises a trip coil for generating electromagnetic force to break the electrical connection, the first region is provided with a fifth pad for soldering one end of the trip coil, the fifth pad is adjacent to and electrically connected with the second pad, a middle region of the circuit board is provided with a sixth pad for soldering the other end of the trip coil, and a fourth trace extending from another switch pin of the thyristor through the third region and the second region and to the sixth pad is further provided.
13. 13. The circuit board of claim 12, wherein the detection protection device further comprises a first varistor and a second diode disposed in the second area, one end of the first varistor and one end of the second diode are each electrically connected to the first trace, and the other end of the first varistor and the other end of the second diode are each electrically connected to the fourth trace.
14. 14. The circuit board of claim 12, wherein the detection protection device further comprises an indication module disposed in the third area, the indication module comprises a sixth resistor and a light emitting diode, one end of the sixth resistor is electrically connected to the fourth trace, the other end of the sixth resistor is electrically connected to one end of the light emitting diode, and the other end of the light emitting diode is electrically connected to the first trace.
15. 15. The circuit board of claim 12, wherein the detection protection device further comprises a second varistor, the first region is provided with a seventh pad and an eighth pad for soldering two ends of the second varistor, the seventh pad is adjacent to the fifth pad, the first region is further provided with a fifth trace, the second pad, the fifth pad and the seventh pad are electrically connected through the fifth trace, and the eighth pad is electrically connected with the second trace.
16. 16. An electrical connection device comprising the circuit board of any one of claims 1 to 15, a power cord, and a test protection device disposed on the circuit board and connected to the power cord.

Description

Circuit board of electric connection equipment and electric connection equipment Technical Field The present invention relates to the field of circuit boards, and in particular, to a circuit board of an electrical connection device and an electrical connection device. Background The leakage current detection circuit breaker (Leakage Circuit Detector Interrupter, LCDI) is a power supply connection device for an electric appliance, can detect leakage current of a power line group through a leakage current detection line, and cuts off power supply connection of the electric appliance when a certain leakage current is detected, so that use safety is ensured. In recent years, in addition to the need for detecting the leakage current of the power supply line through the leakage current detection line, a leakage current detection circuit breaker has also raised a higher safety detection requirement, for example, the need to detect whether the leakage current detection line has an open circuit condition. At present, along with the higher and higher safety detection requirement of the detection protection device of the power line, the components and parts of the circuit module included in the detection protection device are also more and more increased, so that the circuit board layout of the electric connection device also faces more and more challenges, the wiring of the circuit board is difficult, the condition that the wiring is needed exists, the electric signal transmitted on the circuit board is also easy to be interfered, and the board surface size needed by the circuit board is larger. Disclosure of Invention The invention aims to at least solve one of the technical problems in the prior art, and provides a circuit board of an electric connection device and the electric connection device, which can improve the space utilization rate of the circuit board, reduce the size of the circuit board, reduce the wiring difficulty and reduce the interference of electric signals transmitted on the circuit board. In a first aspect, an embodiment of the present invention provides a circuit board of an electrical connection apparatus, where the electrical connection apparatus includes a power line, and a detection protection device disposed on the circuit board and electrically connected to the power line; The power line comprises a first current carrying line, a second current carrying line, a first shielding conductor structure coating the first current carrying line and a second shielding conductor structure coating the second current carrying line, and the first shielding conductor structure is connected with the second shielding conductor structure; The detection protection device comprises a self-checking current injection module, a manual detection module, a fault response module and a trigger module; The circuit board comprises a middle area, a first area, a second area, a third area and a fourth area, wherein the third area is arranged opposite to the first area, the fourth area is arranged opposite to the second area, the second area is respectively connected with one side of the first area and one side of the third area, the fourth area is respectively connected with the other side of the first area and the other side of the third area, and the middle area is surrounded by the first area, the second area, the third area and the fourth area; the first region is provided with a bonding pad for bonding the first current carrying wire, the second current carrying wire, the first shielding conductor structure and the second shielding conductor structure; The self-checking current injection module and the manual detection module are arranged in the middle area of the circuit board. The circuit board of the electric connection equipment has the advantages that the detection protection device in the electric connection equipment is required to detect the electric leakage condition of the current carrying wire through the shielding conductor structure, and also required to detect the open circuit condition of the shielding conductor structure of the current carrying wire, and automatic detection and manual detection are required to be realized simultaneously, so that the detection protection device is required to be provided with a plurality of modules such as a self-checking current injection module, a manual detection module, a fault response module, a triggering module and the like, the circuit board takes the first area as a connection area with the power supply wire, a plurality of bonding pads are arranged for welding the current carrying wire and the shielding conductor structure respectively, and the self-checking current injection module and the manual detection module are both arranged in the middle area of the circuit board and are adjacent to the bonding pads required to be electrically connected, so that wiring can be directly realized, the space utilization rate of the circuit board is greatly improved, th