Automatic power-off safety power supply
The safety power supply design with automatic power-off solves the problem of component damage under over-temperature conditions, realizes automatic power-off when the temperature is too high and restores power supply after the temperature recovers, thus improving the safety and reliability of the power supply.
Patent Information
- Application Number
- CN202423138388.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-19
AI Technical Summary
Existing safety power supplies remain operational even after power loss in overheated environments, posing a safety hazard and failing to further reduce damage.
The safety power supply with automatic power-off includes a power module, an over-temperature judgment module, a primary protection module, a timing detection module, and an output regulation module. The over-temperature judgment module detects the temperature, the timing detection module sets the timer, and controls the primary protection module to stop the transmission of power, thus achieving complete power-off protection.
Automatic power-off when the temperature is too high prevents damage to components and improves power supply safety. Power is restored after the temperature recovers to ensure normal operation of the equipment.
Smart Images
Figure CN223567303U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to safe power supply technical field, concretely is a safe power supply of automatic power failure. BACKGROUND
[0002] In electronic equipment industry, power problem is one of the problems that are paid close attention to all along. Safe power environment ensures the normal work of electronic equipment, and under the over-temperature environment state, will lead to power supply anomaly, the safe power supply in prior art generally adopts temperature sensor, comparator, relay etc. to carry out over-temperature detection to power environment and carries out power failure protection when over-temperature, but after power failure, power environment is still in over-temperature state, will lead to the damage of still in working state component and device such as comparator, relay, cannot further reduce component and device in work, there is certain security risk, therefore, there is to be improved. UTILITY MODEL CONTENT
[0003] The utility model embodiment provides a safe power supply of automatic power failure to solve the problems in the background art.
[0004] To achieve the above object, the utility model provides the following technical scheme:
[0005] A safe power supply of automatic power failure, comprising: a power module, a secondary protection module, an over-temperature judgment module, a primary protection module, a timing detection module and an output adjustment module;
[0006] The power module is used for connecting AC power and carrying out rectification filtering processing to AC power, outputting first power, carrying out voltage stabilizing processing to the first power and outputting second power;
[0007] The secondary protection module is connected with the power module, the over-temperature judgment module, the primary protection module and the timing control module, is used for transmitting the first power to the over-temperature judgment module and the primary protection module, receives the second power and stops the transmission work of the first power when receiving the second control signal output by the timing detection module;
[0008] The over-temperature judgment module is used for carrying out voltage stabilizing filtering processing to the first power and outputting third power, carrying out temperature detection to power environment and outputting the first control signal when the detected temperature signal is greater than the set over-temperature threshold value;
[0009] The primary protection module is connected with the over-temperature judgment module and the output adjustment module, is used for transmitting the first power to the output adjustment module, receives the third power and stops the transmission work of the first power when receiving the first control signal;
[0010] Timing detection module, with the over-temperature judgment module is connected, for setting timing time and receiving the first control signal, receiving the third electric energy and starting timing work, outputting the second control signal after timing ends;
[0011] Output adjustment module, for voltage stabilizing filtering adjustment of the first electric energy transmitted by the primary protection module and power supply for the connected electronic equipment.
[0012] As a further scheme of the utility model: the power module includes power interface, first rectifier, first capacitor, first resistance and first diode, the secondary protection module includes first logic chip, second diode, first switch tube, second relay and second relay switch,
[0013] Preferably, the first end and the second end of the power interface are connected with the first end and the second end of the first rectifier respectively, the third end of the first rectifier is connected with one end of the first capacitor and the moving end of the second relay switch and is connected with the cathode of the first diode, the A end of the first logic chip and one end of the second relay through the first resistance, the fourth end of the first rectifier, the other end of the first capacitor, the anode of the first diode and the emitter of the first switch tube are all grounded, the B end of the first logic chip is connected with the cathode of the second diode and the timing detection module, the anode of the second diode is connected with the base of the first switch tube and the end of the first logic chip, the collector of the first switch tube is connected with the other end of the second relay, and the static end of the second relay switch is connected with the primary protection module and the over-temperature judgment module.
[0014] As a further scheme of the utility model: the over-temperature judgment module includes second capacitor, second resistance, third diode, first thermistor, third resistance, fourth resistance, fifth resistance and first comparator,
[0015] Preferably, one end of the second capacitor is connected with the static end of the second relay switch and is connected with the cathode of the third diode, one end of the first thermistor and one end of the fourth resistance through the second resistance, the other end of the first thermistor is connected with the other end of the fourth resistance through the third resistance, the inverting end of the first comparator is connected with the other end of the fourth resistance and is grounded through the fifth resistance, the anode of the third diode is grounded, and the output end of the first comparator is connected with the timing detection module and the primary protection module.
[0016] As a further scheme of the utility model: the primary protection module includes second switch tube, first relay and first relay switch,
[0017] Preferably, the base of the second switch tube is connected with the output end of the first comparator, the collector of the second switch tube is connected with one end of the first relay, the other end of the first relay is connected with the cathode of the third diode, the emitter of the second switch tube is grounded, the moving end of the first relay switch is connected with the static end of the second relay switch, and the static end of the first relay switch is connected with the output adjustment module.
[0018] As a further scheme of the utility model: the output adjusting module includes a first voltage stabilizer, a third capacitor and an output port;
[0019] Preferably, the third end of the first voltage stabilizer is connected with the static end of the first relay switch, the first end of the first voltage stabilizer is connected with the first end of the output port and one end of the third capacitor, and the other end of the third capacitor, the second end of the output port and the second end of the first voltage stabilizer are all grounded.
[0020] As a further scheme of the utility model: the timing detection module includes a third switch tube, a fourth capacitor, a fourth diode, a sixth resistor, a first timer and a fifth capacitor;
[0021] Preferably, the collector of the third switch tube is connected with the cathode of the third diode, the emitter of the third switch tube is connected with one end of the fourth capacitor, the fourth end and the eighth end of the first timer, the other end of the fourth capacitor is connected with one end of the sixth resistor, the cathode of the fourth diode, the second end and the sixth end of the first timer, the base of the third switch tube is connected with the output end of the first comparator, the anode of the fourth diode, the other end of the sixth resistor and the first end of the first timer are all grounded, the fifth end of the first timer is grounded through the fifth capacitor, and the third end of the first timer is connected with the B end of the first logic chip.
[0022] Compared with the prior art, the utility model has the beneficial effects that: the automatic power-off safety power supply can judge the over-temperature of the power supply environment by the over-temperature judgment module, and when the over-temperature occurs, the output adjusting module is controlled to stop the voltage stabilizing and adjusting work by the primary protection module, and the output adjusting module stops supplying power for the connected electronic equipment, after the temperature recovers, the primary protection module will supply power for the output adjusting module again, and the timing detection module performs timing work during the over-temperature, if the over-temperature duration exceeds the timing time, the secondary protection module will be controlled to stop the over-temperature detection work of the over-temperature judgment module, and the power-off protection is performed completely, thereby improving the safety of the power supply. BRIEF DESCRIPTION OF DRAWINGS
[0023] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will briefly introduce the drawings needed to be used in the description of the utility model embodiment, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creating labor.
[0024] Figure 1 The principle block diagram of the automatic power-off safety power supply provided in the utility model example is shown.
[0025] Figure 2The utility model discloses an automatic power-off safety power supply circuit diagram.
[0026] Figure 3 The utility model discloses a timing detection module's connection circuit diagram. DETAILED DESCRIPTION
[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.
[0028] In one embodiment, referring to Figure 1 , an automatic power-off safety power supply includes: a power module 1, a secondary protection module 2, an over-temperature judgment module 3, a primary protection module 4, a timing detection module 5 and an output adjustment module 6.
[0029] Specifically, the power module 1 is used for connecting AC power and rectifying and filtering the AC power, outputting first power, and performing voltage stabilization on the first power and outputting second power.
[0030] The secondary protection module 2 is connected with the power module 1, the over-temperature judgment module 3, the primary protection module 4 and the timing control module, is used for transmitting the first power to the over-temperature judgment module 3 and the primary protection module 4, receiving the second power and stopping the transmission of the first power when receiving the second control signal output by the timing detection module 5.
[0031] The over-temperature judgment module 3 is used for performing voltage stabilization and filtering on the first power and outputting third power, and detecting the temperature of the power environment and outputting a first control signal when the detected temperature signal is greater than a set over-temperature threshold.
[0032] The primary protection module 4 is connected with the over-temperature judgment module 3 and the output adjustment module 6, is used for transmitting the first power to the output adjustment module 6, receiving the third power and stopping the transmission of the first power when receiving the first control signal.
[0033] The timing detection module 5 is connected with the over-temperature judgment module 3, is used for setting a timing time, receiving the third power and starting timing work when receiving the first control signal, and outputting a second control signal after timing ends.
[0034] The output adjustment module 6 is used for performing voltage stabilization, filtering and adjustment on the first power transmitted by the primary protection module 4 and supplying power to connected electronic devices.
[0035] In specific embodiments, the power module 1 can adopt a power circuit composed of a power interface, a rectifier, a capacitor, a diode, etc., can access AC power and perform rectification filtering and voltage stabilization on the AC power; the secondary protection module 2 can adopt a secondary protection circuit composed of a logic chip, a transistor, a relay, etc., to perform power transmission work, and in the state that the power module 1 accesses AC power, if a high-level signal output by the timing detection module 5 is received, the power transmission work will be directly stopped; the over-temperature judgment module 3 can adopt an over-temperature judgment circuit composed of a diode, a resistor, a comparator, a thermistor, etc., to perform voltage stabilization filtering on the input power and temperature detection on the power supply environment, and when the detected temperature signal exceeds the set over-temperature threshold, the work of the primary protection module 4 and the timing detection module 5 is controlled; the primary protection module 4 can adopt a primary protection circuit composed of a relay and a transistor, which can control the transmission state of the power; the timing detection module 5 can adopt a timing detection circuit composed of a timer, a transistor, a capacitor, etc., which can set a timing time and perform timing work when receiving power, and output a low-level signal during the timing work, and output a high-level signal after the timing ends; the output adjustment module 6 can adopt an output adjustment circuit composed of a voltage stabilizer, a capacitor and an output port, which can be connected with an electronic device and perform voltage stabilization adjustment on the input power to supply power for the electronic device.
[0036] In another embodiment, please refer to Figure 1 、 Figure 2 and Figure 3 , the power module 1 includes a power interface, a first rectifier T1, a first capacitor C1, a first resistor R1 and a first diode D1; the secondary protection module 2 includes a first logic chip J1, a second diode D2, a first switch tube V1, a second relay K2 and a second relay switch K2-1;
[0037] Specifically, the first end and the second end of the power interface are connected with the first end and the second end of the first rectifier T1 respectively, the third end of the first rectifier T1 is connected with one end of the first capacitor C1 and the moving end of the second relay switch K2-1 and is connected with the cathode of the first diode D1, the A end of the first logic chip J1 and one end of the second relay K2 through the first resistor R1, the fourth end of the first rectifier T1, the other end of the first capacitor C1, the anode of the first diode D1 and the emitter of the first switch tube V1 are all grounded, the B end of the first logic chip J1 is connected with the cathode of the second diode D2 and the timing detection module 5, the anode of the second diode D2 is connected with the base of the first switch tube V1 and the end of the first logic chip J1, the collector of the first switch tube V1 is connected with the other end of the second relay K2, and the static end of the second relay switch K2-1 is connected with the primary protection module 4 and the over-temperature judgment module 3.
[0038] In specific embodiments, the first logic chip J1 can be selected as an AND gate chip; the first switch tube V1 can be selected as an NPN type triode; the second relay switch K2-1 can be selected as a normally closed switch, and the disconnection of the second relay switch K2-1 is controlled by the second relay K2 through magnetic attraction.
[0039] Further, the over-temperature judgment module 3 comprises a second capacitor C2, a second resistor R2, a third diode D3, a first thermistor RT1, a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a first comparator A1.
[0040] Specifically, one end of the second capacitor C2 is connected to the static end of the second relay switch K2-1 and connected to the cathode of the third diode D3, one end of the first thermistor RT1, and one end of the fourth resistor R4 through the second resistor R2, the other end of the first thermistor RT1 is connected to the other end of the fourth resistor R4 and grounded through the third resistor R3, the inverting end of the first comparator A1 is connected to the other end of the fourth resistor R4 and grounded through the fifth resistor R5, the anode of the third diode D3 is grounded, and the output end of the first comparator A1 is connected to the timing detection module 5 and the primary protection module 4.
[0041] In specific embodiments, the first thermistor RT1 can be selected as a negative temperature coefficient thermistor, which has a lower resistance value at a higher temperature; the fourth resistor R4 and the fifth resistor R5 cooperate with the second resistor R2 and the third diode D3 to output an over-temperature threshold; and the first comparator A1 can be selected as an LM358 comparator.
[0042] Further, the primary protection module 4 comprises a second switch tube V2, a first relay K1, and a first relay switch K1-1.
[0043] Specifically, the base of the second switch tube V2 is connected to the output end of the first comparator A1, the collector of the second switch tube V2 is connected to one end of the first relay K1, the other end of the first relay K1 is connected to the cathode of the third diode D3, the emitter of the second switch tube V2 is grounded, the moving end of the first relay switch K1-1 is connected to the static end of the second relay switch K2-1, and the static end of the first relay switch K1-1 is connected to the output adjustment module 6.
[0044] In specific embodiments, the second switch tube V2 can be selected as an NPN type triode; and the first relay switch K1-1 can be selected as a normally closed switch, and the disconnection of the first relay switch K1-1 is controlled by the first relay K1 through magnetic attraction.
[0045] Further, the output adjustment module 6 comprises a first voltage stabilizer IC1, a third capacitor C3, and an output port.
[0046] Specifically, the third terminal of the first voltage stabilizer IC1 is connected to the static terminal of the first relay switch K1-1, the first terminal of the first voltage stabilizer IC1 is connected to the first terminal of the output port and one terminal of the third capacitor C3, the other terminal of the third capacitor C3, the second terminal of the output port and the second terminal of the first voltage stabilizer IC1 are all grounded.
[0047] In a specific embodiment, the first voltage stabilizer IC1 can be a 7812 voltage stabilizer.
[0048] Further, the timing detection module 5 comprises a third switch tube V3, a fourth capacitor C4, a fourth diode D4, a sixth resistor R6, a first timer IC2 and a fifth capacitor C5.
[0049] Specifically, the collector of the third switch tube V3 is connected to the cathode of the third diode D3, the emitter of the third switch tube V3 is connected to one terminal of the fourth capacitor C4, the fourth terminal and the eighth terminal of the first timer IC2, the other terminal of the fourth capacitor C4 is connected to one terminal of the sixth resistor R6, the cathode of the fourth diode D4, the second terminal and the sixth terminal of the first timer IC2, the base of the third switch tube V3 is connected to the output terminal of the first comparator A1, the anode of the fourth diode D4, the other terminal of the sixth resistor R6 and the first terminal of the first timer IC2 are all grounded, the fifth terminal of the first timer IC2 is grounded through the fifth capacitor C5, and the third terminal of the first timer IC2 is connected to the B terminal of the first logic chip J1.
[0050] In a specific embodiment, the first timer IC2 can be an NE555 chip, which cooperates with the fourth capacitor C4, the fourth diode D4, the sixth resistor R6 and the fifth capacitor C5 to perform timing work; the third switch tube V3 can be an NPN type triode.
[0051] In the safety power supply of the embodiment, the alternating current is connected through the power interface, the first rectifier T1 and the first capacitor C1 perform rectification and filtering, the first resistor R1 and the first diode D1 perform voltage stabilization, the power is transmitted to the first relay switch K1-1 and the over-temperature judgment module 3 through the second relay switch K2-1, and then transmitted to the first voltage stabilizer IC1 through the first relay switch K1-1, and the voltage stabilization and filtering are performed through the first voltage stabilizer IC1 and the third capacitor C3, so as to supply power for the electronic equipment connected to the output port, and at the same time, the temperature detection is performed by the first thermistor RT1 and the third resistor R3, when the detected temperature signal exceeds the over-temperature threshold set by the fourth resistor R4 and the fifth resistor R5, the first comparator A1 outputs high level, the second switch tube V2 and the third switch tube V3 are both turned on, the first relay K1 is powered on and controls the first relay switch K1-1 to be disconnected, and the work of the first voltage stabilizer IC1 is stopped, the first timer IC2 cooperates with the fourth capacitor C4, the fourth diode D4, the sixth resistor R6 and the fifth capacitor C5 to perform timing work, during the set timing time, if the temperature is lower than the set over-temperature threshold, the first comparator A1 outputs low level, the first relay K1 stops controlling the work of the first relay switch K1-1, so that the first relay switch K1-1 is closed and the first voltage stabilizer IC1 is powered on again, when the duration of the high level output by the first comparator A1 exceeds the set timing time, the third end of the first timer IC2 outputs high level, so that the B end of the first logic chip J1 becomes high level, so that the F end of the first logic chip J1 outputs high level and controls the first switch tube V1 to be turned on during the connection of the alternating current through the power interface, the second relay K2 is powered on and controls the second relay switch K2-1 to be disconnected, and the work and power supply of the over-temperature judgment module 3 are disconnected.
[0052] It is apparent for those skilled in the art that the present application is not limited to the details of the above-mentioned exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to encompass all changes falling within the meaning and range of equivalents of the elements of the claims. Any reference signs in the claims should not be considered as limiting the claims involved.
[0053] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.
Claims
1. An automatic power-off safety power supply, characterized in that, The automatic power-off safety power supply comprises a power module, a secondary protection module, an over-temperature judgment module, a primary protection module, a timing detection module and an output adjustment module; The power module is used for connecting to alternating current power and performing rectification and filtering on the alternating current power, outputting first power, performing voltage stabilization on the first power and outputting second power; The secondary protection module is connected with the power module, the over-temperature judgment module, the primary protection module and the timing control module, and is used for transmitting the first power to the over-temperature judgment module and the primary protection module, receiving the second power and stopping the transmission of the first power when receiving a second control signal output by the timing detection module; The over-temperature judgment module is used for performing voltage stabilization and filtering on the first power and outputting third power, and detecting the temperature of the power supply environment and outputting a first control signal when the detected temperature signal is greater than a set over-temperature threshold; The primary protection module is connected with the over-temperature judgment module and the output adjustment module, and is used for transmitting the first power to the output adjustment module, receiving the third power and stopping the transmission of the first power when receiving the first control signal; The timing detection module is connected with the over-temperature judgment module, and is used for setting a timing time, receiving the third power and starting timing work when receiving the first control signal, and outputting the second control signal after the timing ends; The output adjustment module is used for performing voltage stabilization, filtering and adjustment on the first power transmitted by the primary protection module and supplying power to connected electronic devices.
2. A safety power pack according to claim 1 wherein, The power module comprises a power interface, a first rectifier, a first capacitor, a first resistor and a first diode; and the secondary protection module comprises a first logic chip, a second diode, a first switch tube, a second relay and a second relay switch. The first end and the second end of the power interface are connected with the first end and the second end of the first rectifier respectively, the third end of the first rectifier is connected with one end of the first capacitor and the moving end of the second relay switch and is connected with the cathode of the first diode, the A end of the first logic chip and one end of the second relay through the first resistor, the fourth end of the first rectifier, the other end of the first capacitor, the anode of the first diode and the emitter of the first switch tube are all grounded, the B end of the first logic chip is connected with the cathode of the second diode and the timing detection module, the anode of the second diode is connected with the base of the first switch tube and the end of the first logic chip, the collector of the first switch tube is connected with the other end of the second relay, and the static end of the second relay switch is connected with the primary protection module and the over-temperature judgment module.
3. A safety power pack according to claim 2 wherein, The over-temperature judgment module comprises a second capacitor, a second resistor, a third diode, a first thermistor, a third resistor, a fourth resistor, a fifth resistor and a first comparator; One end of the second capacitor is connected to the static end of the second relay switch and connected to the cathode of the third diode, one end of the first thermistor and one end of the fourth resistor through the second resistor, the other end of the first thermistor is connected to the other end of the first comparator and grounded through the third resistor, the inverting end of the first comparator is connected to the other end of the fourth resistor and grounded through the fifth resistor, the anode of the third diode is grounded, and the output end of the first comparator is connected to the timing detection module and the primary protection module.
4. A safety power pack according to claim 3 wherein, The primary protection module comprises a second switch tube, a first relay and a first relay switch. The base of the second switch tube is connected to the output end of the first comparator, the collector of the second switch tube is connected to one end of the first relay, the other end of the first relay is connected to the cathode of the third diode, the emitter of the second switch tube is grounded, the moving end of the first relay switch is connected to the static end of the second relay switch, and the static end of the first relay switch is connected to the output adjustment module.
5. An automatic disconnect safety power supply as defined in claim 4, wherein, The output adjustment module comprises a first voltage stabilizer, a third capacitor and an output port. The third end of the first voltage stabilizer is connected to the static end of the first relay switch, the first end of the first voltage stabilizer is connected to the first end of the output port and one end of the third capacitor, and the other end of the third capacitor, the second end of the output port and the second end of the first voltage stabilizer are all grounded.
6. An automatic disconnect safety power supply as defined in claim 4 wherein, The timing detection module comprises a third switch tube, a fourth capacitor, a fourth diode, a sixth resistor, a first timer and a fifth capacitor. The collector of the third switch tube is connected to the cathode of the third diode, the emitter of the third switch tube is connected to one end of the fourth capacitor, the fourth end and the eighth end of the first timer, the other end of the fourth capacitor is connected to one end of the sixth resistor, the cathode of the fourth diode, the second end and the sixth end of the first timer, the base of the third switch tube is connected to the output end of the first comparator, the anode of the fourth diode, the other end of the sixth resistor and the first end of the first timer are all grounded, the fifth end of the first timer is grounded through the fifth capacitor, and the third end of the first timer is connected to the B end of the first logic chip.