Direct-current low-voltage power supply output device
Through the rectifying filtering circuit, DC-DC conversion circuit and multi-stage protection circuit, the problems of unstable output and poor heat dissipation of the DC low-voltage power supply device are solved, efficient stability and multiple protection are achieved, and the safety and maintenance convenience of the device are improved.
Patent Information
- Application Number
- CN202510588604.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-08
- Publication Date
- 2025-08-08
AI Technical Summary
The existing DC low-voltage power supply devices have insufficient output stability, are susceptible to input voltage fluctuations, have poor heat dissipation design, single protection function, and lack multi-stage overvoltage and overcurrent protection mechanisms.
It adopts rectified filter circuit, adjustable DC-DC conversion circuit, voltage sampling circuit, current sampling circuit, overvoltage protection circuit, overcurrent protection circuit and temperature sensor, combined with aluminum heat sinks, to achieve multi-level protection and efficient heat dissipation.
It improves output stability by more than 30%, heat dissipation efficiency by 40%, realizes triple protection, and enhances safety and maintenance convenience.
Smart Images
Figure CN120454451A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of power output devices, and in particular relates to a direct current low-voltage power output device. Background Art
[0002] A low-voltage DC power supply output device provides a stable DC voltage, used to power various electronic devices and circuits. It is commonly used in applications requiring a low-voltage DC power supply, such as communications equipment, laboratory instruments, sensors, LED lighting, household appliances, and electronic modules. Existing low-voltage DC power supply devices suffer from the following common issues: insufficient output stability, susceptible to input voltage fluctuations; poor heat dissipation, which can easily lead to component aging after prolonged operation; and limited protection features, lacking multi-level overvoltage and overcurrent protection mechanisms. To address this issue, the present invention proposes a low-voltage DC power supply output device. Summary of the Invention
[0003] The purpose of the present invention is to provide a DC low-voltage power output device that is efficient, stable, compact, and has multiple protection functions.
[0004] The technical solutions adopted by the present invention are as follows:
[0005] A DC low-voltage power output device includes a housing, a circuit board disposed within the housing, wiring devices disposed at both ends of the housing, a rectifier and filter circuit electrically connected to the circuit board, an adjustable DC-DC converter circuit for converting high-voltage DC into low-voltage DC; a single-chip microcomputer, a voltage sampling circuit, a current sampling circuit, an overvoltage protection circuit, an overcurrent protection circuit, and a temperature sensor.
[0006] Preferably, the wiring device includes an input end and an output end, and both the input end and the output end are electrically connected to the circuit board.
[0007] Preferably, a shell cover is connected to the shell by bolts, a liquid crystal electronic screen is provided on the shell cover, and the liquid crystal electronic screen is electrically connected to the circuit board.
[0008] Preferably, the input end and the output end are both wiring terminals, and the wiring terminals include a terminal post, the interior of the terminal post is hollow, the upper end of the terminal post is provided with an internal thread, the lower end of the terminal post is provided with a strip-shaped through hole, the corners of the strip-shaped through hole are rounded, the terminal post is threadedly connected to a wiring bolt, the lower end of the wiring bolt is provided with a wiring head, the size of the wiring head is smaller than the diameter of the inner wall of the terminal post, and a circular through hole is provided in the middle of the wiring head.
[0009] Preferably, aluminum heat sinks distributed in an array with equal intervals are provided on the side walls of the housing.
[0010] Preferably, the output voltage range of the output end is 1.0-12V.
[0011] The technical effects achieved by the present invention are:
[0012] In the present invention, first, a 220V high voltage AC power is connected to the input end, and a metal wire of an electrical device is connected to the output end. During the wiring process, the metal wire is inserted into a circular through hole opened in the middle of the terminal head. As the terminal bolt is screwed, the terminal head rotates, and the terminal head drives the metal wire, so that the metal wire is wound around the terminal head, so that the metal wire is between the outer wall of the terminal head and the inner wall of the terminal post, thereby improving the firmness of the wiring. After the wiring is completed, the rectifier and filter circuit is used to output 24V DC after rectification and filtering of the AC 220V; the adjustable DC-DC conversion circuit is used to convert the high voltage DC into a low voltage DC, so that the output voltage range of the output end is 1.0-12V; the voltage sampling circuit and the current sampling circuit respectively collect the input voltage. The current data and voltage data at the output end are detected by the single-chip microcomputer. The single-chip microcomputer is used to identify whether the current data and voltage data exceed the normal range. If they exceed the normal range, the power supply is automatically disconnected through the overvoltage protection circuit or the overcurrent protection circuit to protect the entire low-voltage DC power supply circuit. The temperature data inside the shell is also detected in real time through the temperature sensor. The single-chip microcomputer is used to identify whether the temperature data exceeds the normal range. If they exceed the normal range, the power supply is automatically disconnected through the overvoltage protection circuit or the overcurrent protection circuit to protect the entire low-voltage DC power supply circuit. In summary, through multi-stage voltage stabilization and feedback control, the output stability is improved by more than 30%; the modular design facilitates maintenance and the heat dissipation efficiency is improved by 40%; the integrated overvoltage, overcurrent and over-temperature triple protection is safer. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the overall structure of a DC low-voltage power supply output device of the present invention;
[0014] Figure 2 This invention Figure 1 Enlarged view of point A in the middle;
[0015] Figure 3 It is a schematic diagram of the overall internal structure of a DC low-voltage power supply output device of the present invention.
[0016] In the accompanying drawings, the components represented by the reference numerals are as follows:
[0017] 1. Housing; 2. Circuit board; 3. Wiring device; 4. Housing cover; 5. Aluminum heat sink; 21. Rectification and filtering circuit; 22. Adjustable DC-DC conversion circuit; 23. Single-chip microcomputer; 24. Voltage sampling circuit; 25. Current sampling circuit; 26. Overvoltage protection circuit; 27. Overcurrent protection circuit; 28. Temperature sensor; 29. LCD electronic screen; 31. Input terminal; 32. Output terminal; 301. Terminal block; 302. Terminal bolt; 303. Terminal head. DETAILED DESCRIPTION
[0018] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the following examples. It should be understood that the following text is only used to describe one or more specific embodiments of the present invention and does not strictly limit the scope of protection of the present invention.
[0019] like Figure 1-Figure 3 As shown, a DC low-voltage power output device includes a shell 1, a circuit board 2 is provided inside the shell 1, and wiring devices 3 are provided at both ends of the shell 1. The circuit board 2 is electrically connected to a rectifier and filter circuit 21, an adjustable DC-DC conversion circuit 22, a single-chip microcomputer 23, a voltage sampling circuit 24, a current sampling circuit 25, an overvoltage protection circuit 26, an overcurrent protection circuit 27 and a temperature sensor 28.
[0020] In the present invention, Figure 3 As shown, the rectifier and filter circuit 21 is used to output 24V DC after rectifying and filtering the AC 220V; the adjustable DC-DC conversion circuit 22 is used to convert the high-voltage DC into a low-voltage DC, so that the output voltage range of the output terminal 32 is 1.0-12V; the voltage sampling circuit 24 and the current sampling circuit 25 respectively collect the current data and voltage data of the output terminal 32, and the single-chip microcomputer 23 is used to identify whether the current data and the voltage data exceed the normal range. If they exceed the normal range, the overvoltage protection circuit 26 or the overcurrent protection circuit 27 automatically disconnects the power supply to protect the entire low-voltage DC power supply circuit.
[0021] In the present invention, the temperature data inside the shell 1 is also detected in real time by the temperature sensor 28, and the single-chip microcomputer 23 is used to identify whether the temperature data exceeds the normal range. If it exceeds the normal range, the power supply is automatically disconnected through the overvoltage protection circuit 26 or the overcurrent protection circuit 27 to protect the entire low-voltage DC power supply circuit.
[0022] Preferably, a shell cover 4 is connected to the shell body 1 by bolts. A liquid crystal electronic screen 29 is provided on the shell cover 4 . The liquid crystal electronic screen 29 is electrically connected to the circuit board 2 .
[0023] Preferably, if Figure 2As shown, the wiring device 3 includes an input end 31 and an output end 32, which are both electrically connected to the circuit board 2. The input end 31 and the output end 32 are both wiring terminals, which include a terminal post 301. The terminal post 301 is hollow inside, and an internal thread is provided at the upper end of the terminal post 301. A strip-shaped through hole is opened at the lower end of the terminal post 301, and the corners of the strip-shaped through hole are rounded. The terminal post 301 is threadedly connected to a wiring bolt 302, and a wiring head 303 is provided at the lower end of the wiring bolt 302. The size of the wiring head 303 is smaller than the inner wall diameter of the terminal post 301, and a circular through hole is opened in the middle of the wiring head 303.
[0024] In the present invention, the metal wire is inserted into the circular through hole opened in the middle of the terminal head 303. As the terminal bolt 302 is screwed, the terminal head 303 rotates accordingly, and the terminal head 303 drives the metal wire so that the metal wire is wrapped around the terminal head 303, so that the metal wire is between the outer wall of the terminal head 303 and the inner wall of the terminal post 301. Compared with the existing direct extrusion of the metal wire, the firmness of the connection is improved and the metal wire is prevented from being crushed.
[0025] Preferably, aluminum heat sinks 5 distributed in an array with equal intervals are provided on the side wall of the housing 1. By providing the aluminum heat sinks 5, the heat dissipation efficiency is increased by 40%.
[0026] like Figure 1-Figure 3 As shown, the working principle of the present invention is as follows: first, connect 220V high-voltage AC power to the input terminal 31, and connect the metal wire of the electrical equipment to the output terminal 32. During the wiring process, the metal wire is inserted into the circular through hole opened in the middle of the terminal head 303. As the terminal bolt 302 is screwed, the terminal head 303 rotates accordingly, and the terminal head 303 drives the metal wire, so that the metal wire is wrapped around the terminal head 303, so that the metal wire is between the outer wall of the terminal head 303 and the inner wall of the terminal post 301, thereby improving the firmness of the wiring. After the wiring is completed, the rectifier and filter circuit 21 is used to output 24V DC after rectification and filtering of the AC 220V; the adjustable DC-DC conversion circuit 22 is used to convert the high-voltage DC into a low-voltage DC , so that the output voltage range of the output terminal 32 is 1.0-12V; the voltage sampling circuit 24 and the current sampling circuit 25 respectively collect the current data and voltage data of the output terminal 32, and the single-chip microcomputer 23 is used to identify whether the current data and the voltage data exceed the normal range. If they exceed the normal range, the overvoltage protection circuit 26 or the overcurrent protection circuit 27 automatically disconnects the power supply to protect the entire low-voltage DC power supply circuit. The temperature data inside the shell 1 is also detected in real time through the temperature sensor 28. The single-chip microcomputer 23 is used to identify whether the temperature data exceeds the normal range. If they exceed the normal range, the overvoltage protection circuit 26 or the overcurrent protection circuit 27 automatically disconnects the power supply to protect the entire low-voltage DC power supply circuit.
[0027] The foregoing is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained herein shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.
Claims
1. A DC low-voltage power output device, characterized in that: The invention comprises a housing (1), a circuit board (2) is provided inside the housing (1), wiring devices (3) are provided at both ends of the housing (1), and the circuit board (2) is electrically connected to a rectifier filter circuit (21), an adjustable DC-DC conversion circuit (22), a single chip computer (23), a voltage sampling circuit (24), a current sampling circuit (25), an overvoltage protection circuit (26), an overcurrent protection circuit (27) and a temperature sensor (28).
2. A DC low-voltage power output device according to claim 1, characterized in that: The wiring device (3) comprises an input end (31) and an output end (32), and both the input end (31) and the output end (32) are electrically connected to the circuit board (2).
3. A DC low-voltage power output device according to claim 2, characterized in that: The housing (1) is connected to a housing cover (4) via bolts. A liquid crystal electronic screen (29) is provided on the housing cover (4). The liquid crystal electronic screen (29) is electrically connected to the circuit board (2).
4. A DC low-voltage power output device according to claim 3, characterized in that: The input end (31) and the output end (32) are both wiring terminals, and the wiring terminals include a terminal post (301). The terminal post (301) is hollow inside, and an internal thread is provided at the upper end of the terminal post (301). A strip-shaped through hole is provided at the lower end of the terminal post (301), and the corners of the strip-shaped through hole are rounded. The terminal post (301) is threadedly connected to a wiring bolt (302), and a wiring head (303) is provided at the lower end of the wiring bolt (302). The size of the wiring head (303) is smaller than the inner wall diameter of the terminal post (301), and a circular through hole is provided in the middle of the wiring head (303).
5. The DC low-voltage power output device according to claim 1, characterized in that: Aluminum heat sinks (5) distributed in an array with equal spacing are provided on the side wall of the housing (1).
6. A DC low-voltage power output device according to claim 2, characterized in that: The output voltage range of the output terminal (32) is 1.0-12V.