A high-performance high-power water purifier power adapter with over-temperature protection indication

Abstract

The application relates to the technical field of power supplies, in particular to a high-performance high-power water purifier power adapter with over-temperature protection indication, which comprises an input port, an output port, a rectification and filtering module, a switching conversion module, a main control module, a PFC power factor correction module, a voltage stabilizing output module and an over-temperature protection module; the output end of the rectification and filtering module is connected with the input end of the PFC power factor correction module; the output end of the PFC power factor correction module is respectively connected with the input end of the switching conversion module; the output end of the switching conversion module is connected with the input end of the voltage stabilizing output module; the output end of the voltage stabilizing output module is connected with the output port; the over-temperature protection module comprises a thermistor RT1; the thermistor RT1 is connected with the main control module. When the temperature of the power supply is too high, the resistance value of the thermistor RT1 can be reduced to interrupt the work of the main control module, so that the power supply is protected.

Description

Technical Field

[0001] The present invention relates to the technical field of power supplies, and in particular to a high-performance, high-power water purifier power adapter with an over-temperature protection indicator. Background Art

[0002] With the rapid development of electronic information technology, electronic equipment and systems based on large-scale integrated circuits are widely used in various fields of modern life, and water purifier power supply is one of the many household electronic devices.

[0003] When the water purifier power supply works at high temperature and high power for a long time, the power supply is prone to failure due to excessive temperature, which may cause burnout. Summary of the Invention

[0004] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art and to provide a high-performance, high-power water purifier power adapter with over-temperature protection indication.

[0005] The purpose of the present invention is achieved through the following technical solutions: a high-performance, high-power water purifier power adapter with over-temperature protection indication, comprising an input port, an output port, a rectifier and filter module, a switch conversion module, a main control module, a PFC power factor correction module, a voltage stabilization output module, and an over-temperature protection module;

[0006] The input port is connected to the input end of the rectifier and filter module; the output end of the rectifier and filter module is connected to the input end of the PFC power factor correction module; the output ends of the PFC power factor correction module are respectively connected to the input ends of the switch conversion module; the output end of the switch conversion module is connected to the input end of the voltage stabilizing output module; the output end of the voltage stabilizing output module is connected to the output port; the main control module is used to control the PFC power factor correction module and the switch conversion module;

[0007] The over-temperature protection module includes a thermistor RT1; the thermistor RT1 is connected to the main control module.

[0008] The present invention is further configured as follows: the rectifier and filter module includes a thermistor NTC, a rectifier bridge BD1, a capacitor CX1, a common-mode inductor LF1, and a common-mode inductor LF2; the input port is connected to the common-mode inductor LF1 through the thermistor NTC; the common-mode inductor LF1 is connected to the input end of the rectifier bridge BD1 after passing through the capacitor CX1 and the common-mode inductor LF2 in sequence; and the output end of the rectifier bridge BD1 is connected to the input end of the PFC power factor correction module.

[0009] The present invention is further configured such that the high-performance, high-power water purifier power adapter with over-temperature protection indication also includes a diode D6 and a diode D7; the positive electrode of the diode D6 and the positive electrode of the diode D7 are respectively connected to the two ends of the common-mode inductor LF2; the negative electrode of the diode D6 and the negative electrode of the diode D7 are connected to the main control module.

[0010] The present invention is further configured such that the PFC power factor correction module includes a capacitor C1, a capacitor C2, a transformer T1, a switch tube Q1, and a diode D1; the output end of the rectifier and filter module is connected to one end of the primary side of the transformer T1 through capacitors C1 and C2 respectively; the other end of the primary side of the transformer T1 is connected to the input end of the switching conversion module through diode D1; the other end of the primary side of the transformer T1 is connected to the switch end of the switch tube Q1; the control end of the switch tube Q1 is connected to the main control module; and the secondary side of the transformer T1 is connected to the main control module.

[0011] The present invention is further configured such that the switching conversion module includes a switch tube Q2 and a transformer T2; one end of the primary side of the transformer T2 is connected to the input end of the PFC power factor correction module; the other end of the primary side of the transformer T2 is connected to the switch end of the switch tube Q2; the control end of the switch tube Q2 is connected to the main control module; and the secondary side of the transformer T2 is connected to the input end of the voltage stabilization output module.

[0012] The present invention is further configured such that the voltage-stabilized output module includes a diode D10, a diode D10A, a capacitor C29, a capacitor C30, and a capacitor C31; the output end of the switching conversion module is connected to the anode of the diode D10 and the anode of the diode D10A, respectively; the cathode of the diode D10 and the cathode of the diode D10A are connected to the output port in sequence through the capacitor C29, the capacitor C30, and the capacitor C31.

[0013] The present invention is further configured such that the over-temperature protection module further includes a resistor R58A, a capacitor C5, a resistor R58 and a light-emitting LED 1; one end of the thermistor RT1 is connected to the main control module through the resistor R58; the other end of the thermistor RT1 is grounded; one end of the light-emitting LED 1 is connected to the main control module through the resistor R58A; the other end of the light-emitting LED 1 is grounded.

[0014] The present invention is further configured such that the main control module includes a chip U1; the model of the chip U1 is LD7790.

[0015] Beneficial effects of the present invention: By setting an over-temperature protection module, the present invention can interrupt the operation of the main control module by reducing the resistance of the thermistor RT1 when the power supply temperature is too high, so that the chip U1 of the main control module stops working, thereby protecting the power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The invention is further described with reference to the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the invention. A person skilled in the art can obtain other drawings based on the following drawings without making any creative effort.

[0017] Figure 1 is a circuit diagram of the present invention;

[0018] Among them: 1. Input port; 2. Output port. DETAILED DESCRIPTION

[0019] The present invention is further described with reference to the following examples.

[0020] Depend on Figure 1 It can be seen that the high-performance, high-power water purifier power adapter with over-temperature protection indication described in this embodiment includes an input port, an output port, a rectifier and filter module, a switch conversion module, a main control module, a PFC power factor correction module, a voltage stabilization output module, and an over-temperature protection module;

[0021] The input port is connected to the input end of the rectifier and filter module; the output end of the rectifier and filter module is connected to the input end of the PFC power factor correction module; the output ends of the PFC power factor correction module are respectively connected to the input ends of the switch conversion module; the output end of the switch conversion module is connected to the input end of the voltage stabilizing output module; the output end of the voltage stabilizing output module is connected to the output port; the main control module is used to control the PFC power factor correction module and the switch conversion module;

[0022] The over-temperature protection module includes a thermistor RT1; the thermistor RT1 is connected to the main control module.

[0023] Specifically, the high-performance, high-power water purifier power adapter with over-temperature protection indication described in this embodiment, when the water purifier needs to be powered by AC power, first, AC power enters the circuit from the input port, and then the AC power passes through the rectifier and filter module, the PFC power factor correction module, the switch conversion module, the main control module and the voltage stabilizing output module to output a stable DC voltage to the output port, thereby powering the water purifier; in addition, this embodiment sets an over-temperature protection module. When the power supply works in a high-temperature and high-power state for a long time, the power supply is prone to failure due to excessive temperature and burnout. At this time, the thermistor RT1 can play a good protective role. When the temperature is too high, the resistance of the thermistor RT1 will decrease, thereby lowering the voltage of the fifth pin of the chip U1 of the main control module. When the voltage of this pin is low enough that the chip U1 of the main control module can interrupt the operation of the chip U1 of the main control module, the chip U1 of the main control module stops working, thereby protecting the power supply.

[0024] The embodiment described a high-performance, high-power water purifier power adapter with over-temperature protection indication, wherein the rectifier and filter module includes a thermistor NTC, a rectifier bridge BD1, a capacitor CX1, a common-mode inductor LF1, and a common-mode inductor LF2; the input port is connected to the common-mode inductor LF1 through the thermistor NTC; the common-mode inductor LF1 is connected to the input end of the rectifier bridge BD1 after passing through the capacitor CX1 and the common-mode inductor LF2 in turn; the output end of the rectifier bridge BD1 is connected to the input end of the PFC power factor correction module.

[0025] Specifically, this embodiment can effectively prevent conducted interference from the power grid through the input EMI rectification and filtering circuit composed of thermistor NTC rectifier bridge BD1, capacitor CX1, common mode inductor LF1 and common mode inductor LF2.

[0026] The embodiment described a high-performance, high-power water purifier power adapter with an over-temperature protection indicator, and the high-performance, high-power water purifier power adapter with an over-temperature protection indicator also includes a diode D6 and a diode D7; the positive electrode of the diode D6 and the positive electrode of the diode D7 are respectively connected to the two ends of the common-mode inductor LF2; the cathode of the diode D6 and the cathode of the diode D7 are connected to the main control module.

[0027] Specifically, when the AC is disconnected, the residual voltage on the capacitor CX1 is connected to the chip U1 of the main control module through the diode D6 and the diode D7 to be discharged, and at the same time, a starting voltage is provided to the chip U1 of the main control module.

[0028] The present embodiment describes a high-performance, high-power water purifier power adapter with over-temperature protection indication, wherein the PFC power factor correction module includes a capacitor C1, a capacitor C2, a transformer T1, a switch tube Q1, and a diode D1; the output end of the rectifier and filter module is connected to one end of the primary side of the transformer T1 through capacitors C1 and C2 respectively; the other end of the primary side of the transformer T1 is connected to the input end of the switching conversion module through a diode D1; the other end of the primary side of the transformer T1 is connected to the switch end of the switch tube Q1; the control end of the switch tube Q1 is connected to the main control module; and the secondary side of the transformer T1 is connected to the main control module.

[0029] Specifically, capacitor C1, capacitor C2, transformer T1, switch tube Q1 and diode D1 form a PFC power correction circuit, which can improve the power factor value and have a high utilization rate for the national power grid.

[0030] The embodiment described in this invention is a high-performance, high-power water purifier power adapter with over-temperature protection indication, wherein the switching conversion module includes a switching tube Q2 and a transformer T2; one end of the primary side of the transformer T2 is connected to the input end of the PFC power factor correction module; the other end of the primary side of the transformer T2 is connected to the switch end of the switching tube Q2; the control end of the switching tube Q2 is connected to the main control module; and the secondary side of the transformer T2 is connected to the input end of the voltage stabilization output module.

[0031] In the embodiment of the present invention, a high-performance, high-power water purifier power adapter with over-temperature protection indication is described. The voltage-stabilized output module includes a diode D10, a diode D10A, a capacitor C29, a capacitor C30, and a capacitor C31. The output end of the switching conversion module is respectively connected to the anode of the diode D10 and the anode of the diode D10A. The cathode of the diode D10 and the cathode of the diode D10A are connected to the output port in sequence through the capacitor C29, the capacitor C30, and the capacitor C31.

[0032] Specifically, diode D10, diode D10A, capacitor C29, capacitor C30, and capacitor C31 form a secondary rectification and voltage stabilization circuit, which can output a stable voltage.

[0033] The embodiment described in this invention is a high-performance, high-power water purifier power adapter with over-temperature protection indication, wherein the over-temperature protection module further includes a resistor R58A, a capacitor C5, a resistor R58 and a light-emitting LED1; one end of the thermistor RT1 is connected to the main control module through the resistor R58; the other end of the thermistor RT1 is grounded; one end of the light-emitting LED1 is connected to the main control module through the resistor R58A; the other end of the light-emitting LED1 is grounded.

[0034] Specifically, the thermistor RT1, resistor R58A, capacitor C5, resistor R58 and LED1 constitute the over-temperature protection and LED indication control functions. When the power supply works in a high-temperature and high-power state for a long time, the power supply is prone to malfunction due to excessive temperature and may burn out. At this time, the thermistor RT1 can play a very good protective role. When the temperature is too high, the resistance of the thermistor RT1 will drop, thereby lowering the voltage of the fifth pin of the chip U1. When the voltage of this pin is low enough to interrupt the operation of the chip U1 inside the chip U1, the chip U1 stops working, thereby protecting the power supply. Therefore, the pin voltage drops. When the voltage is too low to make the luminous LED1 turn on, the luminous LED1 stops emitting light. Therefore, it can be seen from the LED display of the power supply that the power supply has entered the protection state. When working normally, the luminous LED1 will emit an indication light.

[0035] This embodiment describes a high-performance, high-power water purifier power adapter with over-temperature protection. The main control module includes a chip U1; the model of chip U1 is LD7790. Specifically, the LD7790 chip ensures high circuit efficiency, reduces losses, and improves reliability. This chip U1 features a two-in-one PFC and PWM circuit, with internal OTP, OVP, and OLP protection functions.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A high-performance, high-power water purifier power adapter with over-temperature protection indicator, characterized by: It includes an input port, an output port, a rectifier and filter module, a switch conversion module, a main control module, a PFC power factor correction module, a voltage stabilization output module and an over-temperature protection module; the main control module includes a chip U1; The input port is connected to the input end of the rectifier and filter module; the output end of the rectifier and filter module is connected to the input end of the PFC power factor correction module; the output ends of the PFC power factor correction module are respectively connected to the input ends of the switch conversion module; the output end of the switch conversion module is connected to the input end of the voltage stabilizing output module; the output end of the voltage stabilizing output module is connected to the output port; the main control module is used to control the PFC power factor correction module and the switch conversion module; The over-temperature protection module includes a thermistor RT1; the thermistor RT1 is connected to the main control module; When the water purifier needs to be powered by mains electricity, AC power first enters the circuit from the input port, and then the AC power passes through the rectifier and filter module, PFC power factor correction module, switch conversion module, main control module and voltage stabilization output module to output a stable DC voltage to the output port, thereby powering the water purifier; The PFC power factor correction module includes capacitor C1, capacitor C2, transformer T1, switch tube Q1 and diode D1; the output end of the rectifier and filter module is connected to one end of the primary side of the transformer T1 through capacitor C1 and capacitor C2 respectively; the other end of the primary side of the transformer T1 is connected to the input end of the switch conversion module through diode D1; the other end of the primary side of the transformer T1 is connected to the switch end of the switch tube Q1; the control end of the switch tube Q1 is connected to the main control module; and the secondary side of the transformer T1 is connected to the main control module. The over-temperature protection module further includes a resistor R58A, a capacitor C5, a resistor R58, and a light-emitting LED 1; one end of the thermistor RT1 is connected to the main control module via the resistor R58; the other end of the thermistor RT1 is grounded; one end of the light-emitting LED 1 is connected to the main control module via the resistor R58A; the other end of the light-emitting LED 1 is grounded; Thermistor RT1, resistor R58A, capacitor C5, resistor R58 and LED1 form the over-temperature protection and LED indication control functions. When the power supply operates at high temperature and high power for a long time, the resistance of thermistor RT1 will drop, thereby lowering the voltage of the fifth pin of chip U1. When the voltage of this pin is low enough to interrupt the operation of chip U1, chip U1 stops working, thereby protecting the power supply. Therefore, the voltage of this pin drops. When the voltage is too low to turn on LED1, LED1 stops emitting light. Therefore, the LED display of the power supply shows that the power supply has entered the protection state. When it is working normally, LED1 will emit a bright indicator light. The rectifier and filter module includes a thermistor NTC, a rectifier bridge BD1, a capacitor CX1, a common-mode inductor LF1, and a common-mode inductor LF2; the input port is connected to the common-mode inductor LF1 through the thermistor NTC; the common-mode inductor LF1 is connected to the input end of the rectifier bridge BD1 after passing through the capacitor CX1 and the common-mode inductor LF2 in sequence; the output end of the rectifier bridge BD1 is connected to the input end of the PFC power factor correction module; Through the input EMI rectification and filtering circuit composed of thermistor NTC rectifier bridge BD1, capacitor CX1, common mode inductor LF1 and common mode inductor LF2; The high-performance, high-power water purifier power adapter with over-temperature protection indication further includes a diode D6 and a diode D7; the anode of the diode D6 and the anode of the diode D7 are respectively connected to the two ends of the common-mode inductor LF2; the cathode of the diode D6 and the cathode of the diode D7 are connected to the main control module; When the AC is disconnected, the residual voltage on the capacitor CX1 is connected to the chip U1 of the main control module through the diode D6 and the diode D7 to discharge, and at the same time provide the starting voltage to the chip U1 of the main control module; The model of the chip U1 is LD7790.

2. The high-performance, high-power water purifier power adapter with over-temperature protection indicator according to claim 1, characterized in that: The switching conversion module includes a switch tube Q2 and a transformer T2; one end of the primary side of the transformer T2 is connected to the input end of the PFC power factor correction module; the other end of the primary side of the transformer T2 is connected to the switch end of the switch tube Q2; the control end of the switch tube Q2 is connected to the main control module; and the secondary side of the transformer T2 is connected to the input end of the voltage stabilization output module.

3. The high-performance, high-power water purifier power adapter with over-temperature protection indicator according to claim 1, characterized in that: The voltage-stabilized output module includes a diode D10, a diode D10A, a capacitor C29, a capacitor C30, and a capacitor C31; the output end of the switching conversion module is connected to the anode of the diode D10 and the anode of the diode D10A respectively; the cathode of the diode D10 and the cathode of the diode D10A are connected to the output port in sequence through the capacitor C29, the capacitor C30, and the capacitor C31.

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