CN216390540U - Household appliance charging system based on Wifi - Google Patents

Household appliance charging system based on Wifi Download PDF

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CN216390540U
CN216390540U CN202121332708.9U CN202121332708U CN216390540U CN 216390540 U CN216390540 U CN 216390540U CN 202121332708 U CN202121332708 U CN 202121332708U CN 216390540 U CN216390540 U CN 216390540U
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electrically connected
resistor
module
capacitor
input
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林海涛
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Guangzhou Institute of Technology
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Guangzhou Institute of Technology
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/242—Home appliances
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The utility model provides a household appliance charging system based on Wifi, which comprises an input power supply, a power supply conversion module, a surge suppression protection module and an overvoltage protection module, the power supply reverse connection protection module, the Wifi module, the processing module, the relay and the charging interface, the input end of the power supply conversion module is electrically connected with the input power supply, the output end is electrically connected with the input end of the surge suppression protection module, the output end of the surge suppression protection module is electrically connected with the input end of the overvoltage protection module, the output end of the overvoltage protection module is electrically connected with the input end of the power supply reverse connection protection module, the output end of the power supply reverse connection protection module is electrically connected with one contact of the relay, the other contact of the relay is electrically connected with the input end of the charging interface, the signal output end of the Wifi module is electrically connected with the signal input end of the processing module, and the signal output end of the processing module is electrically connected with the relay and used for controlling the on-off of the relay. The utility model can remotely control the on-off of the charging interface and has good practicability.

Description

Household appliance charging system based on Wifi
Technical Field
The utility model relates to the technical field of household appliances, in particular to a household appliance charging system based on Wifi.
Background
The home appliances are various electric appliances and electronic appliances used in homes and the like, and are also called as household appliances and daily-use appliances. The household appliances are released from heavy, trivial and time-consuming household work, create more comfortable and beautiful life and working environment which are more beneficial to physical and mental health for human beings, provide rich and colorful cultural and entertainment conditions, and become necessities of modern family life.
Many kinds of household appliances, such as electric toothbrushes, shavers, electric meat grinders, and smart speakers, require special charging devices to charge rechargeable batteries. The traditional household appliance charging device cannot remotely control the on-off state of the household appliance charging device, the intelligent degree is low, and the structure of the household appliance charging device needs to be improved.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems that the traditional household appliance charging device cannot remotely control the on-off of the household appliance charging device and has low intelligent degree, the utility model provides a household appliance charging system based on Wifi, which has the following specific technical scheme:
the utility model provides a domestic appliance charging system based on Wifi, includes input power, power conversion module, surge suppression protection module, overvoltage protection module, power reverse connection protection module, Wifi module, processing module, relay and the interface that charges, power conversion module's input with the input power electricity is connected, power conversion module's output with surge suppression protection module's input electricity is connected, surge suppression protection module's output with overvoltage protection module's input electricity is connected, overvoltage protection module's output with power reverse connection protection module's input electricity is connected, power reverse connection protection module's output with a contact electricity of relay is connected, another contact of relay with the input electricity of the interface that charges is connected, overvoltage protection module's output respectively with Wifi module and processing module electricity is connected and does Wifi module and processing module do The module provides working voltage, the signal output end of the Wifi is electrically connected with the signal input end of the processing module, and the signal output end of the processing module is electrically connected with the relay and used for controlling the on-off of the relay.
The power supply conversion module is used for converting commercial power into direct current voltage of 5V or 12V and the like and providing working voltage for the Wifi module and the processing module. The surge suppression protection module, the overvoltage protection module and the power supply reverse connection protection module are used for preventing the household appliances from being damaged by factors such as fluctuation of a power grid, lightning surge and misconnection of a power supply.
And the Wifi module is in communication connection with an intelligent terminal such as a mobile phone, a tablet or a remote controller and receives the on-off instruction of the household appliance charging system. The processing module controls whether the relay contact is attracted or not according to the on-off instruction, and can remotely control the on-off of the charging interface.
In conclusion, the household appliance charging system based on the Wifi can remotely control the on-off of the charging interface, solves the problems that the traditional household appliance charging device cannot remotely control the on-off of the charging interface, is low in intelligent degree and has good practicability.
In addition, after passing through the power conversion module, the input power passes through the surge suppression protection module, the overvoltage protection module and the power reverse connection protection module, so that the damage to a mobile phone mainboard caused by factors such as fluctuation of a power grid, lightning surge, misconnection of a power supply and the like can be well prevented;
further, the overvoltage protection circuit includes a transistor Q1, a capacitor C1, a zener diode D2, a resistor R1, a resistor R2, a resistor R3, a capacitor C2, and a MOS tube Q2, wherein an emitter of the transistor Q1 is electrically connected to the input power source, a collector of the transistor Q1 is electrically connected to one end of the resistor R2, the other end of the resistor R2 is grounded, one end of the capacitor C1 is electrically connected to a base of the transistor Q1, the other end of the capacitor C1 is grounded, a cathode of the zener diode D2 is electrically connected to a base of the transistor Q1, an anode of the zener diode D2 is electrically connected to one end of the resistor R1, the other end of the resistor R1 is grounded, one end of the resistor R3 is electrically connected to the input power source, the other end of the resistor R3 is electrically connected in series with the resistor R2 and then grounded, one end of the capacitor C2 is electrically connected to the input power source, the other end of the capacitor C2 is grounded after being connected in series with the resistor R2, the drain of the MOS transistor Q2 is electrically connected with the input power supply, the gate of the MOS transistor Q2 is electrically connected with one end of the resistor R2, and the source of the MOS transistor Q2 is electrically connected with the input end of the power supply reverse connection protection module.
Further, the reverse power protection module comprises a MOS transistor Q3 and a resistor R4, a drain of the MOS transistor Q3 is electrically connected to a source of the MOS transistor Q2, a gate of the MOS transistor Q3 is electrically connected to one end of the resistor R4, the other end of the resistor R4 is grounded, and a drain of the MOS transistor Q3 is electrically connected to one contact of the relay.
Further, the surge suppression protection module comprises a transient suppression diode D1, the cathode of the transient suppression diode D1 is electrically connected with the output end of the power conversion module, and the anode of the transient suppression diode D1 is grounded.
Further, the surge suppression protection module comprises a transient suppression diode D3, a diode D4, a diode D5, a capacitor C3, a resistor R5 and a voltage stabilizing diode D6, the cathode of the transient suppression diode D3 is electrically connected to the output terminal of the power conversion module, the anode of the transient suppression diode D3 is grounded, the output end of the power conversion module is electrically connected with the anode of the diode D4, the cathode of the diode D4 is electrically connected with the anode of the diode D5, the cathode of the diode D5 is electrically connected with one end of the capacitor C3 and the cathode of the voltage stabilizing diode D6 respectively, the cathode of the zener diode D6 is electrically connected to the cathode of the diode D5, the anode of the zener diode D6 is electrically connected to one end of the resistor R5, and the other end of the capacitor C3 and the other end of the resistor R5 are both grounded.
Furthermore, the household appliance charging system further comprises an output current adjusting module, and the other contact of the relay is electrically connected with the input end of the charging interface through the output current adjusting module.
Further, the output current adjusting module includes a USB current-limiting chip, a capacitor C4, a capacitor C5, a resistor R6, a resistor R7, an adjustable resistor R8, an adjustable resistor R9, and an adjustable resistor R10, an input terminal VIN of the USB current-limiting chip is electrically connected to another contact of the relay, one end of the resistor R6 and one end of the capacitor C4 are both electrically connected to the input terminal VIN of the USB current-limiting chip, the other end of the resistor R6 is electrically connected to an enable input terminal EN of the USB current-limiting chip, the other end of the capacitor C4 is grounded, one end of the resistor R7 is electrically connected to one end of the adjustable resistor R10, the other end of the adjustable resistor R10 is electrically connected to one end of the adjustable resistor R9, the other end of the adjustable resistor R9 is electrically connected to one end of the adjustable resistor R8, and the other end of the resistor R8 is electrically connected to a current setting terminal ISET of the current-limiting chip, one end of the capacitor C5 is electrically connected with the output end VOUT of the USB current-limiting chip, the other end of the resistor R7, which is connected with the capacitor C5, is grounded, and the output end VOUT of the USB current-limiting chip is electrically connected with the input end of the charging interface.
Furthermore, the household appliance charging system further comprises a current detection circuit, wherein the output end VOUT of the USB current-limiting chip is electrically connected with the input end of the charging interface through the current detection circuit, one end of the current detection circuit is electrically connected with the output end VOUT of the USB current-limiting chip, and the other end of the current detection circuit is electrically connected with the input end of the charging interface.
Further, the USB current-limiting chip is in a model PL2700, and the resistance value of the resistor R7 is 3.4K omega.
Drawings
The utility model will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.
Fig. 1 is a schematic diagram of an overall circuit structure of a Wifi-based household appliance charging system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an overall circuit structure of a Wifi-based household appliance charging system according to an embodiment of the present invention;
fig. 3 is a first schematic structural relationship diagram of a surge suppression protection module, an overvoltage protection module and a power reverse connection protection module of a Wifi-based household appliance charging system in an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a circuit structure relationship among a surge suppression protection module, an overvoltage protection module and a power reverse connection protection module of a Wifi-based household appliance charging system according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of an output current adjusting module of a Wifi-based household appliance charging system according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a circuit structure relationship between an output current adjusting module and a current detecting circuit of a Wifi-based household appliance charging system in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof. It should be understood that the detailed description and specific examples, while indicating the scope of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The terms "first" and "second" used herein do not denote any particular order or quantity, but rather are used to distinguish one element from another.
As shown in fig. 1, a Wifi-based household appliance charging system in an embodiment of the present invention includes an input power source, a power conversion module, a surge suppression protection module, an overvoltage protection module, a power reverse connection protection module, a Wifi module, a processing module, a relay, and a charging interface, where an input end of the power conversion module is electrically connected to the input power source, an output end of the power conversion module is electrically connected to an input end of the surge suppression protection module, an output end of the surge suppression protection module is electrically connected to an input end of the overvoltage protection module, an output end of the overvoltage protection module is electrically connected to an input end of the power reverse connection protection module, an output end of the power reverse connection protection module is electrically connected to one contact of the relay, and another contact of the relay is electrically connected to an input end of the charging interface, the output end of the overvoltage protection module is respectively electrically connected with the Wifi module and the processing module and provides working voltage for the Wifi module and the processing module, the signal output end of the Wifi module is electrically connected with the signal input end of the processing module, and the signal output end of the processing module is electrically connected with the relay and is used for controlling the on-off of the relay.
The power supply conversion module is used for converting commercial power into direct current voltage of 5V or 12V and the like and providing working voltage for the Wifi module and the processing module. The surge suppression protection module, the overvoltage protection module and the power supply reverse connection protection module are used for preventing the household appliances from being damaged by factors such as fluctuation of a power grid, lightning surge and misconnection of a power supply. Since the power conversion module is a common power conversion circuit for converting 220V ac mains power into 5V dc power, it is not described herein again.
And the Wifi module is in communication connection with an intelligent terminal such as a mobile phone, a tablet or a remote controller and receives the on-off instruction of the household appliance charging system. The processing module controls whether the relay contact is attracted or not according to the on-off instruction, and can remotely control the on-off of the charging interface.
In conclusion, the household appliance charging system based on the Wifi can remotely control the on-off of the charging interface, solves the problems that the traditional household appliance charging device cannot remotely control the on-off of the charging interface, is low in intelligent degree and has good practicability.
In addition, after passing through the power conversion module, the input power passes through the surge suppression protection module, the overvoltage protection module and the power reverse connection protection module, so that the damage to a mobile phone mainboard caused by factors such as fluctuation of a power grid, lightning surge, misconnection of a power supply and the like can be well prevented;
in one embodiment, as shown in fig. 3 and 4, the overvoltage protection circuit includes a transistor Q1, a capacitor C1, a zener diode D2, a resistor R1, a resistor R2, a resistor R3, a capacitor C2, and a fourth MOS transistor Q2, an emitter of the transistor Q1 is electrically connected to the input power source, a collector of the transistor Q1 is electrically connected to one end of the resistor R2, the other end of the resistor R2 is grounded, one end of the capacitor C1 is electrically connected to a base of the transistor Q1, the other end of the capacitor C1 is grounded, a cathode of the zener diode D2 is electrically connected to a base of the transistor Q1, an anode of the zener diode D2 is electrically connected to one end of the resistor R1, the other end of the resistor R1 is grounded, one end of the resistor R3 is electrically connected to the input power source, and the other end of the resistor R3 is electrically connected to the ground after being connected to the resistor R2 in series, one end of the capacitor C2 is electrically connected with the input power supply, the other end of the capacitor C2 is connected with the resistor R2 in series and then is grounded, the drain electrode of the MOS tube Q2 is electrically connected with the input power supply, the gate electrode of the MOS tube Q2 is electrically connected with one end of the resistor R2, and the source electrode of the MOS tube Q2 is electrically connected with the input end of the power reverse connection protection module.
Specifically, the triode Q1 is a PNP triode, and the MOS transistor Q2 and the MO transistor Q3 are PMOS transistors. The resistor R1 is a current-limiting resistor, so that the voltage-stabilizing diode D2 is prevented from being burnt out by overlarge current when the voltage-stabilizing diode D2 breaks down, the current-limiting resistor with the resistance value within the range of 1k omega-10 k omega is preferably selected, and the triode Q1 cannot be conducted due to the overlarge current. The triode Q1 is used for controlling the on and off of the MOS transistor Q2. The resistor R3 is used for residual voltage suppression, and is preferably selected to be 1m omega-2 m omega in resistance. The resistor R2 is used for providing proper conducting voltage for the grid electrode of the MOS transistor Q2, and the resistance value is preferably 100k omega-200 k omega. The capacitor C2 is a filter capacitor, prevents MOS tube Q2 from misoperation, and the capacitance value of the capacitor C2 is preferably 500 pF-2000 pF. The MOS transistor Q2 is used for controlling the on/off of the charging loop, when the on-resistance of the MOS transistor Q2 is too large, the impedance of the charging loop increases, which affects the charging efficiency, generally, the on-resistance of the MOS transistor Q2 is required to be less than or equal to 50m Ω, and when the withstand voltage value of the MOS transistor Q2 is greater than or equal to 20V, the 5-12V mobile phone charger can be satisfied.
When the voltage of the charger is continuously higher than the rated voltage, the overvoltage protection module consisting of the voltage-stabilizing diode D2, the triode Q1 and the MOS tube Q2 plays a role, the voltage Vovp of a protection point is equal to the reverse breakdown voltage Vz of the voltage stabilizer, and when the voltage of the USB power port exceeds the reverse breakdown voltage Vz, the base electrode of the triode Q1 is pulled down and is in a conducting state; the gate voltage of the MOS transistor Q2 is pulled high, and the MOS transistor Q2 is turned off, and the charging is stopped. The protection point voltage Vovp is mainly determined by a voltage stabilizing diode D2, and a voltage stabilizing tube with reverse breakdown voltage Vz of 5.6V can be selected when a standard 5V charger is used.
In one embodiment, as shown in fig. 3 and 4, the reverse power protection module includes a MOS transistor Q3 and a resistor R4, a drain of the MOS transistor Q3 is electrically connected to a source of the MOS transistor Q2, a gate of the MOS transistor Q3 is electrically connected to one end of the resistor R4, another end of the resistor R4 is grounded, and a drain of the MOS transistor Q3 is electrically connected to one contact of the relay.
The working process of the power supply reverse connection protection circuit is as follows: if the DC power supply is reversely connected, the circuit can be directly burnt out, the MOS tube Q3 is cut off when the DC power supply is reversely connected, the charging loop is disconnected, and a good reverse connection prevention protection effect is achieved.
In one embodiment, as shown in fig. 3, the surge suppression protection module includes a transient suppression diode D1, a cathode of the transient suppression diode D1 is electrically connected to the output terminal of the power conversion module, and an anode of the transient suppression diode D1 is grounded. The transient suppression diode D1 is used for circuit surge protection, and preferably a TVS tube with a breakdown voltage of more than 5.5V is selected, and the reverse breakdown voltage of the transient suppression diode D1 is more than 1.1 times of the withstand voltage value of the charger.
In one embodiment, as shown in fig. 4, the surge suppression protection module includes a transient suppression diode D3, a diode D4, a diode D5, a capacitor C3, a resistor R5 and a zener diode D6, the cathode of the transient suppression diode D3 is electrically connected to the output terminal of the power conversion module, the anode of the transient suppression diode D3 is grounded, the output end of the power conversion module is electrically connected with the anode of the diode D4, the cathode of the diode D4 is electrically connected with the anode of the diode D5, the cathode of the diode D5 is electrically connected with one end of the capacitor C3 and the cathode of the voltage stabilizing diode D6 respectively, the cathode of the zener diode D6 is electrically connected to the cathode of the diode D5, the anode of the zener diode D6 is electrically connected to one end of the resistor R5, and the other end of the capacitor C3 and the other end of the resistor R5 are both grounded.
In one embodiment, as shown in fig. 2, the household appliance charging system further includes an output current regulating module, and the other contact of the relay is electrically connected to the input terminal of the charging interface through the output current regulating module.
In one embodiment, as shown in fig. 5, the output current adjusting module includes a USB current limiting chip, a capacitor C4, a capacitor C5, a resistor R6, a resistor R7, an adjustable resistor R8, an adjustable resistor R9, and an adjustable resistor R10, an input terminal VIN of the USB current limiting chip is electrically connected to another contact of the relay, one end of the resistor R6 and one end of the capacitor C4 are electrically connected to an input terminal VIN of the USB current limiting chip, the other end of the resistor R6 is electrically connected to an enable input terminal EN of the USB current limiting chip, the other end of the capacitor C4 is grounded, one end of the resistor R7 is electrically connected to one end of the adjustable resistor R10, the other end of the adjustable resistor R10 is electrically connected to one end of the adjustable resistor R9, the other end of the adjustable resistor R9 is electrically connected to one end of the adjustable resistor R8, and the other end of the resistor R8 is electrically connected to a current setting terminal ISET of the USB current limiting chip, one end of the capacitor C5 is electrically connected with the output end VOUT of the USB current-limiting chip, the other end of the resistor R7, which is connected with the capacitor C5, is grounded, and the output end VOUT of the USB current-limiting chip is electrically connected with the input end of the charging interface.
Specifically, the USB current-limiting chip is of a model PL2700, and the resistance of the resistor R7 is 3.4K Ω.
The USB current-limiting chip adopts PL2700, and its output current i (a) is 6.8K Ω/(R7 + R8+ R9+ R10) K Ω, and the range of the output current i (a) is 0.5A-2A. By adjusting the adjustable resistor R8, the adjustable resistor R9 and the adjustable resistor R10, a user can conveniently adjust the output current of the charging system to 0.5A, 1A, 1.5A or 2A, so that the power of the charging circuit is matched with the rechargeable battery in the household appliance, and the damage to the rechargeable battery in the household appliance caused by overhigh output power of the charging system or the low charging efficiency of the rechargeable battery in the household appliance caused by overlow output power of the charging circuit is avoided.
In one embodiment, as shown in fig. 6, the household appliance charging system further includes a current detection circuit, the output terminal VOUT of the USB current-limiting chip is electrically connected to the input terminal of the charging interface through the current detection circuit, one end of the current detection circuit is electrically connected to the output terminal VOUT of the USB current-limiting chip, and the other end of the current detection circuit is electrically connected to the input terminal of the charging interface.
Through the current detection circuit, a user can visually see the output current of the charging circuit, and the output power of the charging circuit can be conveniently adjusted.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (9)

1. A household appliance charging system based on Wifi comprises an input power supply, a power supply conversion module and a charging interface, and is characterized by further comprising a surge suppression protection module, an overvoltage protection module, a power supply reverse connection protection module, a Wifi module, a processing module and a relay, wherein the input end of the power supply conversion module is electrically connected with the input power supply, the output end of the power supply conversion module is electrically connected with the input end of the surge suppression protection module, the output end of the surge suppression protection module is electrically connected with the input end of the overvoltage protection module, the output end of the overvoltage protection module is electrically connected with the input end of the power supply reverse connection protection module, the output end of the power supply reverse connection protection module is electrically connected with one contact of the relay, and the other contact of the relay is electrically connected with the input end of the charging interface, the output end of the overvoltage protection module is respectively electrically connected with the Wifi module and the processing module and provides working voltage for the Wifi module and the processing module, the signal output end of the Wifi module is electrically connected with the signal input end of the processing module, and the signal output end of the processing module is electrically connected with the relay and is used for controlling the on-off of the relay.
2. The Wifi-based household appliance charging system as claimed in claim 1, wherein the overvoltage protection circuit includes a transistor Q1, a capacitor C1, a zener diode D2, a resistor R1, a resistor R2, a resistor R3, a capacitor C2, and a MOS transistor Q2, an emitter of the transistor Q1 is electrically connected to the input power source, a collector of the transistor Q1 is electrically connected to one end of the resistor R2, the other end of the resistor R2 is grounded, one end of the capacitor C1 is electrically connected to a base of the transistor Q1, the other end of the capacitor C1 is grounded, a cathode of the zener diode D2 is electrically connected to a base of the transistor Q1, an anode of the zener diode D2 is electrically connected to one end of the resistor R1, the other end of the resistor R1 is grounded, one end of the resistor R3 is electrically connected to the input power source, the other end of the resistor R3 is connected in series with the resistor R2 and then grounded, one end of the capacitor C2 is electrically connected with the input power supply, the other end of the capacitor C2 is connected with the resistor R2 in series and then is grounded, the drain electrode of the MOS tube Q2 is electrically connected with the input power supply, the gate electrode of the MOS tube Q2 is electrically connected with one end of the resistor R2, and the source electrode of the MOS tube Q2 is electrically connected with the input end of the power reverse connection protection module.
3. A Wifi-based household electrical appliance charging system as claimed in claim 2, wherein said power reverse connection protection module includes a MOS transistor Q3 and a resistor R4, the drain of said MOS transistor Q3 is electrically connected to the source of said MOS transistor Q2, the gate of said MOS transistor Q3 is electrically connected to one end of said resistor R4, the other end of said resistor R4 is grounded, and the drain of said MOS transistor Q3 is electrically connected to one contact of said relay.
4. A Wifi-based household appliance charging system as claimed in claim 3, characterized in that, the surge suppression protection module includes a transient suppression diode D1, the cathode of the transient suppression diode D1 is electrically connected to the output terminal of the power conversion module, and the anode of the transient suppression diode D1 is grounded.
5. A Wifi-based household electrical appliance charging system as claimed in claim 3, wherein said surge suppressing protection module includes transient suppression diode D3, diode D4, diode D5, capacitor C3, resistor R5 and zener diode D6, the cathode of said transient suppression diode D3 is electrically connected to the output terminal of said power conversion module, the anode of said transient suppression diode D3 is grounded, the output terminal of said power conversion module is electrically connected to the anode of said diode D4, the cathode of said diode D4 is electrically connected to the anode of said diode D5, the cathode of said diode D5 is electrically connected to one end of said capacitor C3 and the cathode of said zener diode D6, the cathode of said zener diode D6 is electrically connected to the cathode of said diode D5, the anode of said zener diode D6 is electrically connected to one end of said resistor R5, the other end of the capacitor C3 and the other end of the resistor R5 are both grounded.
6. A household appliance charging system as claimed in claim 4 or 5, further comprising an output current regulating module, wherein the other contact of the relay is electrically connected to the input terminal of the charging interface through the output current regulating module.
7. The Wifi-based household appliance charging system as claimed in claim 6, wherein the output current adjusting module comprises a USB current-limiting chip, a capacitor C4, a capacitor C5, a resistor R6, a resistor R7, an adjustable resistor R8, an adjustable resistor R9 and an adjustable resistor R10, an input VIN of the USB current-limiting chip is electrically connected with another contact of the relay, one end of the resistor R6 and one end of the capacitor C4 are both electrically connected with the input VIN of the USB current-limiting chip, the other end of the resistor R6 is electrically connected with an enable input EN of the USB current-limiting chip, the other end of the capacitor C4 is grounded, one end of the resistor R7 is electrically connected with one end of the adjustable resistor R10, the other end of the adjustable resistor R10 is electrically connected with one end of the adjustable resistor R9, and the other end of the adjustable resistor R9 is electrically connected with one end of the adjustable resistor R8, the other end of the resistor R8 is electrically connected with the ISET of the USB current-limiting chip, one end of the capacitor C5 is electrically connected with the output end VOUT of the USB current-limiting chip, the other end of the resistor R7 is connected with the other end of the capacitor C5 and is grounded, and the output end VOUT of the USB current-limiting chip is electrically connected with the input end of the charging interface.
8. The Wifi-based household appliance charging system as claimed in claim 7, further comprising a current detection circuit, wherein the output terminal VOUT of the USB current-limiting chip is electrically connected to the input terminal of the charging interface through the current detection circuit, one end of the current detection circuit is electrically connected to the output terminal VOUT of the USB current-limiting chip, and the other end of the current detection circuit is electrically connected to the input terminal of the charging interface.
9. The Wifi-based household appliance charging system as claimed in claim 8, wherein the USB current limiting chip is PL2700, and the resistor R7 is 3.4K Ω.
CN202121332708.9U 2021-06-15 2021-06-15 Household appliance charging system based on Wifi Active CN216390540U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117060344A (en) * 2023-08-18 2023-11-14 合肥开梦科技有限责任公司 Power supply control circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117060344A (en) * 2023-08-18 2023-11-14 合肥开梦科技有限责任公司 Power supply control circuit
CN117060344B (en) * 2023-08-18 2024-05-24 合肥开梦科技有限责任公司 Power supply control circuit

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