Power supply with grounding leakage protection

Abstract

The utility model discloses a power supply with grounding leakage protection, which comprises a power supply shell, a circuit board is fixedly arranged at the bottom of the inner side of the power supply shell, an IC (integrated circuit) chip, a filtering module, a rectifier and an isolation transformer are fixedly mounted at the top end of the circuit board, and a first pin of the IC chip is connected with a resistor R2 and a resistor R10. According to the power supply with the grounding leakage protection function, the electric leakage of the power supply is discharged through ground wire protection, it is ensured that the electric leakage phenomenon does not occur to power receiving equipment, the safety and reliability of products are improved, normal operation of electrical equipment is ensured, the reliability of the products is improved, and the service life of the products is prolonged. The input ground and the output ground of the power supply are connected, and the power supply noise interference at the power grid end of the input power supply of the product forms a loop to the ground, so that the grounding product can be protected to have a better EMI effect, the anti-electromagnetic interference performance of the product is improved, and the power supply has better performance and safety.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply, in particular to a power supply with ground leakage protection. Background Technique

[0002] A power supply is a device that converts other forms of energy into electrical energy. The power supply can convert alternating current into direct current through a transformer and a rectifier. However, the existing power supply does not have the function of ground leakage protection during use, which easily leads to personal electric shock accidents, and the existing power supply has poor anti-electromagnetic interference performance.

[0003] To solve the above problems, a power supply with ground leakage protection is proposed here. Summary of the Invention

[0004] The purpose of the utility model is to provide a power supply with ground leakage protection to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A power supply with ground leakage protection, including a power supply housing. A circuit board is fixedly arranged at the bottom inside the power supply housing. An IC chip, a filtering module, a rectifier, and an isolation transformer T1A are fixedly installed at the top of the circuit board. The first pin of the IC chip is connected to a resistor R2 and a resistor R10. One end of the resistor R10 far from the IC chip is connected to a resistor R3 and a polarized capacitor CE3. One end of the resistor R3 far from the resistor R10 is connected to a diode D2. One end of the polarized capacitor CE3 far from the resistor R10 is connected to a C9. One end of the resistor R2 far from the IC chip is connected to a resistor R1. One end of the resistor R1 far from the resistor R2 is connected to a capacitor C2, a resistor R5, a resistor R4, and a resistor R6. One end of the capacitor C2 far from the resistor R1 is connected to a safety capacitor CY1. The safety capacitor CY1 is grounded. One end of the resistor R6 far from the resistor R1 is connected to the isolation transformer T1A and a polarized capacitor CE2. One end of the polarized capacitor CE2 far from the resistor R6 is connected to an inductor LF1. A polarized capacitor CE1 is connected between the first pin and the fourth pin of the inductor LF1. One end of the polarized capacitor CE1 is connected to a rectifier bridge BD1. The sixth pin of the isolation transformer T1A is connected to a diode D4 and a resistor R13. One end of the resistor R13 far from the isolation transformer T1A is connected to a capacitor C7. One end between the diode D4 and the capacitor C7 is connected to a polarized capacitor CE5, a capacitor C11, and a resistor R14. The seventh pin of the isolation transformer T1A, the polarized capacitor CE5, the capacitor C11, and the resistor R14 are all grounded. The fifth pin of the IC chip is connected to a diode D1. The sixth pin of the IC chip is connected to a capacitor C3.

[0006] The power supply discharges the leakage current of the power supply through ground wire protection, ensuring that the powered equipment does not have leakage current, improving the safety and reliability of the product, preventing personal electric shock accidents, ensuring the normal operation of electrical equipment. By connecting the input ground and output ground of the power supply, the power supply noise interference at the power grid end of the product input forms a loop through grounding, so as to protect the grounded product with better EMI effect, improve the electromagnetic interference resistance of the product, and make the power supply more excellent in performance and safety.

[0007] Preferably, a number of evenly distributed heat dissipation holes are provided in the middle of both sides of the power supply housing and in the middle of the front of the power supply housing. The setting of the number of heat dissipation holes facilitates the heat dissipation treatment of the power supply housing.

[0008] Preferably, two fixing parts are fixedly provided at the bottom of both sides of the power supply housing, and fixing holes are provided in the middle of the four fixing parts. The cooperation of the four fixing parts and the four fixing holes facilitates the fixed installation of the power supply.

[0009] Preferably, a socket is provided at the bottom of the back of the power supply housing.

[0010] Preferably, a mounting seat is fixedly communicated with the top of the back of the power supply housing. A heat dissipation fan is fixedly provided at one end inside the mounting seat, and a dust-proof net is fixedly connected to the end inside the mounting seat away from the heat dissipation fan. The setting of the dust-proof net can play a role in dust prevention.

[0011] Preferably, connection card seats are fixedly provided on both sides of the top end of the inner wall of the power supply housing. A storage net seat is clamped between the two connection card seats. A desiccant is arranged inside the storage net seat. The desiccant in the storage net seat facilitates the dehumidification treatment of the air inside the power supply housing, avoiding the excessive humidity of the air inside the power supply housing from affecting the normal operation of internal components.

[0012] Preferably, a sealing net cover is clamped at the top of the storage net seat. The setting of the sealing net cover can play a sealing role.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: The power supply discharges the leakage current of the power supply through ground wire protection, ensuring that the powered equipment does not have leakage current, improving the safety and reliability of the product, preventing personal electric shock accidents, ensuring the normal operation of electrical equipment. By connecting the input ground and output ground of the power supply, the power supply noise interference at the power grid end of the product input forms a loop through grounding, so as to protect the grounded product with better EMI effect, improve the electromagnetic interference resistance of the product, and make the power supply more excellent in performance and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a perspective view of the present utility model;

[0015] Figure 2 is a front cross-sectional view of the present utility model;

[0016] Figure 3 is an enlarged view of the partial A of the present utility model;

[0017] Figure 4 is a circuit diagram of the present utility model.

[0018] In the figure: 1, power supply housing; 2, circuit board; 3, IC chip; 4, filtering module; 5, rectifier; 6, isolation transformer T1A; 7, socket; 8, mounting seat; 9, cooling fan; 10, dust screen; 11, connection card holder; 12, storage network seat; 13, sealed network cover; 14, heat dissipation holes; 15, fixing member; 16, fixing holes. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0020] Please refer to Figures 1-4, the present utility model provides a power supply with ground leakage protection, including a power supply housing 1. At the bottom inside the power supply housing 1, a circuit board 2 is fixedly arranged. At the top of the circuit board 2, an IC chip 3, a filtering module 4, a rectifier 5, and an isolation transformer T1A6 are fixedly installed. The first pin of the IC chip 3 is connected to a resistor R2 and a resistor R10. One end of the resistor R10 away from the IC chip 3 is connected to a resistor R3 and a polarized capacitor CE3. One end of the resistor R3 away from the resistor R10 is connected to a diode D2. One end of the polarized capacitor CE3 away from the resistor R10 is connected to a C9. One end of the resistor R2 away from the IC chip 3 is connected to a resistor R1. One end of the resistor R1 away from the resistor R2 is connected to a capacitor C2, a resistor R5, a resistor R4, and a resistor R6. One end of the capacitor C2 away from the resistor R1 is connected to a safety capacitor CY1. The safety capacitor CY1 is grounded. One end of the resistor R6 away from the resistor R1 is connected to the isolation transformer T1A6 and a polarized capacitor CE2. One end of the polarized capacitor CE2 away from the resistor R6 is connected to an inductor LF1. Between the first pin and the fourth pin of the inductor LF1, a polarized capacitor CE1 is connected. One end of the polarized capacitor CE1 is connected to a rectifier bridge BD1. The sixth pin of the isolation transformer T1A6 is connected to a diode D4 and a resistor R13. One end of the resistor R13 away from the isolation transformer T1A6 is connected to a capacitor C7. Between the diode D4 and the capacitor C7, a polarized capacitor CE5, a capacitor C11, and a resistor R14 are connected. The seventh pin of the isolation transformer T1A6, the polarized capacitor CE5, the capacitor C11, and the resistor R14 are all grounded. The fifth pin of the IC chip 3 is connected to a diode D1. The sixth pin of the IC chip 3 is connected to a capacitor C3. This power supply discharges the leakage current of the power supply through ground wire protection, ensuring that the powered device does not have a leakage current phenomenon, improving the safety and reliability of the product, being able to prevent personal electric shock accidents, ensuring the normal operation of electrical equipment. By connecting the input ground and the output ground of the power supply, the power supply noise interference at the power grid end of the product input forms a loop through grounding, so as to be able to protect the grounded product to have a better EMI effect, improve the anti-electromagnetic interference of the product, and make the power supply have more excellent performance and safety.

[0021] In the middle of both sides of the power supply housing 1 and in the middle of the front of the power supply housing 1, a plurality of evenly distributed heat dissipation holes 14 are opened. At the bottom of both sides of the power supply housing 1, two fixing parts 15 are fixedly arranged. In the middle of the four fixing parts 15, fixing holes 16 are opened. At the bottom of the back of the power supply housing 1, a socket 7 is arranged;

[0022] During use, through the setting of the plurality of heat dissipation holes 14, it is convenient to dissipate heat from the power supply housing 1. Through the cooperative setting of the four fixing parts 15 and the four fixing holes 16, it is convenient to fixedly install this power supply;

[0023] At the top of the back surface of the power supply housing 1, a mounting seat 8 is fixedly connected and communicated. At one end inside the mounting seat 8, a cooling fan 9 is fixedly arranged. At one end inside the mounting seat 8 away from the cooling fan 9, a dust-proof net 10 is fixedly connected. On both sides of the top end of the inner wall of the power supply housing 1, connection card seats 11 are fixedly arranged. Between the two connection card seats 11, a storage net seat 12 is snap-fitted. Inside the storage net seat 12, a desiccant is arranged. At the top end of the storage net seat 12, a sealing net cover 13 is snap-fitted.

[0024] During use, the setting of the dust-proof net 10 can play a role in dust prevention. The desiccant in the storage net seat 12 facilitates the dehumidification of the air inside the power supply housing 1, avoiding the excessive humidity of the air inside the power supply housing 1 from affecting the normal operation of the internal components. The setting of the sealing net cover 13 can play a sealing role.

[0025] When the embodiment of the present application is in use: The power supply discharges the leakage current of the power supply through ground wire protection, ensuring that the powered device will not have a leakage phenomenon, improving the safety and reliability of the product, preventing personal electric shock accidents, and ensuring the normal operation of electrical equipment. By connecting the input ground and the output ground of the power supply, the power supply noise interference at the power grid end of the product input is formed into a loop through grounding, so that the grounded product can have a good EMI effect and improve the anti-electromagnetic interference of the product, making the power supply more excellent in performance and safety. During the use process, the desiccant in the storage net seat 12 facilitates the dehumidification of the air inside the power supply housing 1, avoiding the excessive humidity of the air inside the power supply housing 1 from affecting the normal operation of the internal components.

[0026] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power supply with ground leakage protection, comprising a power supply housing (1), characterized in that: A circuit board (2) is fixedly arranged at the bottom of the inner side of the power supply housing (1); an IC chip (3), a filter module (4), a rectifier (5) and an isolation transformer T1A (6) are fixedly installed at the top of the circuit board (2); a first pin of the IC chip (3) is connected to a resistor R2 and a resistor R10; an end of the resistor R10 away from the IC chip (3) is connected to a resistor R3 and a polar capacitor CE3; an end of the resistor R3 away from the resistor R10 is connected to a diode D2; an end of the polar capacitor CE3 away from the resistor R10 is connected to a capacitor C9; an end of the resistor R2 away from the IC chip (3) is connected to a resistor R1; an end of the resistor R1 away from the resistor R2 is connected to a capacitor C2, a resistor R5, a resistor R4 and a resistor R6; an end of the capacitor C2 away from the resistor R1 is connected to a safety capacitor CY1; the safety capacitor CY1 is grounded; and the resistor R6 away from the resistor R1 One end of the isolation transformer T1A (6) is connected to an isolation transformer T1A (6) and a polar capacitor CE2, the end of the polar capacitor CE2 away from the resistor R6 is connected to an inductor LF1, the first pin of the inductor LF1 and the fourth pin of the inductor LF1 are connected to a polar capacitor CE1, one end of the polar capacitor CE1 is connected to a rectifier bridge BD1, the sixth pin of the isolation transformer T1A (6) is connected to a diode D4 and a resistor R13, the end of the resistor R13 away from the isolation transformer T1A (6) is connected to a capacitor C7, the end between the diode D4 and the capacitor C7 is connected to a polar capacitor CE5, a capacitor C11 and a resistor R14, the seventh pin of the isolation transformer T1A (6), the polar capacitor CE5, the capacitor C11 and the resistor R14 are all grounded, the fifth pin of the IC chip (3) is connected to a diode D1, and the sixth pin of the IC chip (3) is connected to a capacitor C3.

2. A power supply with ground leakage protection according to claim 1, characterized in that: A plurality of evenly distributed heat dissipation holes (14) are provided in the middle of both sides of the power supply housing (1) and in the middle of the front side of the power supply housing (1).

3. The power supply with ground leakage protection according to claim 1, characterized in that: Two fixing members (15) are fixedly provided at the bottom of both sides of the power supply housing (1), and fixing holes (16) are provided in the middle of the four fixing members (15).

4. The power supply with ground leakage protection according to claim 1, characterized in that: A socket (7) is provided at the bottom of the back side of the power supply housing (1).

5. The power supply with ground leakage protection according to claim 1, characterized in that: The top of the back side of the power supply housing (1) is fixedly connected to a mounting seat (8), a cooling fan (9) is fixedly arranged at one end of the inner side of the mounting seat (8), and a dust screen (10) is fixedly connected to one end of the inner side of the mounting seat (8) away from the cooling fan (9).

6. The power supply with ground leakage protection according to claim 1, characterized in that: Connecting sockets (11) are fixedly arranged on both sides of the top of the inner wall of the power supply housing (1), a storage net seat (12) is arranged between the two connecting sockets (11), and a desiccant is arranged inside the storage net seat (12).

7. The power supply with ground leakage protection according to claim 6, characterized in that: A sealing net cover (13) is provided at the top end of the storage net seat (12).

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