CN207490595U - Power-supplying circuit and electrical equipment - Google Patents
Power-supplying circuit and electrical equipment Download PDFInfo
- Publication number
- CN207490595U CN207490595U CN201721475024.8U CN201721475024U CN207490595U CN 207490595 U CN207490595 U CN 207490595U CN 201721475024 U CN201721475024 U CN 201721475024U CN 207490595 U CN207490595 U CN 207490595U
- Authority
- CN
- China
- Prior art keywords
- power supply
- power
- resistor
- load
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Landscapes
- Keying Circuit Devices (AREA)
Abstract
The utility model discloses a kind of power-supplying circuit and electrical equipment, the circuit includes main control chip, power detecting switching circuit, load driving circuits and power-off water outlet/water key, the test side of power detecting switching circuit is connect with mains-supplied power supply, the input terminal of power detecting switching circuit and the input terminal of load driving circuits are connect with supplying cell, the output terminal of power detecting switching circuit and the power end of main control chip connect, the signal input part of main control chip is connect with power-off water outlet/water key, the control terminal of main control chip and the controlled end of load driving circuits, the power output end of load driving circuits is connect with the power end loaded；Wherein, for main control chip when detecting mains-supplied power outage, for control load driving circuits by supplying cell voltage output to the power end loaded and when receiving water key signal, control load driving circuits drive loaded work piece.The utility model realization need not increase button, and water pump can work normally after a power failure.
Description
Technical Field
The utility model relates to an electronic circuit technical field, in particular to power supply control circuit and electrical equipment.
Background
At present, a common electric hot water bottle is usually controlled to discharge water by a built-in water pump, and most of the electric hot water bottles need to be additionally provided with independent water discharge keys and a power supply battery to drive the water pump to work, so that the problem that when the electric hot water bottle is powered off or a plug is disconnected from mains supply is solved, the electric hot water bottle is serially connected between the power supply battery and the water pump through the power-off water discharge keys, the battery is controlled to drive the water pump to normally work, namely, the electric hot water bottle is provided with two keys, namely the water discharge key when the mains supply is needed and the power-.
However, the production cost of the electric hot water bottle is increased, the difficulty of circuit board layout and wiring of the electric control board is easily increased, more importantly, two water outlet keys are arranged on the electric hot water bottle, the functions are complex, the electric hot water bottle is easy to confuse when in use, and the electric hot water bottle is inconvenient for users to use.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a power supply control circuit and electrical equipment aims at realizing need not to increase the button, when non-outage play water mode and outage play water mode, a play water button of sharing to realize that the electric hot water bottle is after the electricity falls, its water pump normally controls out water.
In order to achieve the above object, the present invention provides a power supply control circuit, which is applied to an electrical device having a power-off water outlet function, the power supply control circuit comprises a main control chip, a power detection switch circuit, a load driving circuit and a power-off water outlet/water outlet button, wherein a detection end of the power detection switch circuit is connected to a mains supply power supply, an input end of the power detection switch circuit and an input end of the load driving circuit are respectively connected to a power supply battery, an output end of the power detection switch circuit is connected to a power end of the main control chip, a signal input end of the main control chip is connected to the power-off water outlet/water outlet button, a control end of the main control chip is connected to a controlled end of the load driving circuit, and a power output end of the load driving circuit is connected to a power end of an electrical load in the electrical device, the grounding signal output end of the load driving circuit is connected with the grounding end of the electric load; wherein,
the power-off water outlet/water outlet key is used for outputting a water outlet key signal when being triggered;
the power supply detection switch circuit is used for being started when the fact that the commercial power supply stops supplying power is detected, so that the power supply battery is controlled to supply power to the main control chip;
the main control chip is used for controlling the load driving circuit to output the voltage of the power supply battery to a power end of the power utilization load when the fact that the commercial power supply stops supplying power is detected; and when the water outlet key signal is received, controlling the load driving circuit to drive the electric load to work.
Preferably, the power detection switch circuit includes a first resistor, a second resistor, a first diode and a first switch tube, a first end of the first resistor is a detection end of the power detection switch circuit, and a second end of the first resistor is connected to an anode of the first diode; the cathode of the first diode is interconnected with the controlled end of the first switch tube and the first end of the second resistor; the second end of the second resistor is grounded; the input end of the first switch tube is connected with the power supply battery, and the output end of the first switch tube is the output end of the power supply detection switch circuit.
Preferably, the power supply detection switch circuit further comprises a second diode and a third diode, and an anode of the second diode is connected with the power supply battery; the cathode of the second diode is connected with the anode of the third diode; and the cathode of the third diode is connected with the input end of the first switching tube.
Preferably, the load driving circuit comprises a switching signal detection unit, a load power supply switching unit and a load driving unit, wherein a detection end of the switching signal detection unit is connected with a first control end of the main control chip, and an output end of the switching signal detection unit is connected with a controlled end of the load power supply switching unit; the output end of the load power supply switch unit is connected with the power end of the electric load; the controlled end of the load driving unit is connected with the second control end of the main control chip, the input end of the load driving unit is grounded, and the output end of the load driving unit is connected with the grounding end of the electric load; wherein,
the switch signal detection unit is used for controlling the on/off of the load power supply switch unit according to the control signal output by the main control chip;
the load power supply switch unit is used for controlling the power supply battery to be electrically connected with a power end of the electric load when the switch-on output by the switch signal detection unit is received;
and the load driving unit is used for controlling the grounding end of the electric load to be grounded when receiving the switch control signal output by the main control chip.
Preferably, the switching signal detection unit includes a third resistor, a fourth resistor and a second switching tube, a first end of the third resistor is a detection end of the switching signal detection unit, and a second end of the third resistor is interconnected with a first end of the fourth resistor and a controlled end of the second switching tube; the second end of the fourth resistor and the input end of the second switching tube are grounded; the output end of the second switch tube is the switch signal detection unit.
Preferably, the load power supply switch unit includes a fifth resistor, a sixth resistor, and a third switching tube, a first end of the fifth resistor is a controlled end of the load power supply switch unit and is interconnected with a first end of the sixth resistor and an input end of the third switching tube, a second end of the fifth resistor is interconnected with a second end of the sixth resistor and a controlled end of the third switching tube, and an output end of the third switching tube is an output end of the load power supply switch unit.
Preferably, the load driving unit includes a seventh resistor, an eighth resistor and a fourth switching tube, a first end of the seventh resistor is a controlled end of the load driving unit, and a second end of the seventh resistor is interconnected with the first end of the eighth resistor and the controlled end of the fourth switching tube; and the second end of the eighth resistor and the input end of the fourth switch tube are both grounded, and the output end of the fourth switch tube is the output end of the load driving unit.
Preferably, the load driving circuit further includes a fourth diode and a fifth diode, an anode of the fourth diode is connected to the commercial power supply, and a cathode of the fourth diode is connected to a cathode of the fifth diode and the output terminal of the load power supply switch unit; and the anode of the fifth diode is connected with the output end of the load driving unit.
The utility model also provides an electric appliance, which comprises a mains supply power supply, an electric load, a water outlet button and the power supply control circuit, wherein the mains supply power supply is respectively connected with the electric load and the detection end of the power supply control circuit; the power supply control circuit comprises a main control chip, a power supply detection switch circuit and a load driving circuit, wherein the detection end of the power supply detection switch circuit is connected with a mains supply power supply, the input end of the power supply detection switch circuit and the input end of the load driving circuit are connected with a power supply battery, the output end of the power supply detection switch circuit is connected with the power supply end of the main control chip, the control end of the main control chip is connected with the controlled end of the load driving circuit, and the power supply output end of the load driving circuit is connected with the power supply end of an electric load in the electrical equipment; the power supply detection switch circuit is used for being started when the fact that the commercial power supply stops supplying power is detected, so that the power supply battery is controlled to supply power to the main control chip; and the main control chip is used for controlling the load driving circuit to output the voltage of the power supply battery to the power end of the power utilization load when detecting that the commercial power supply stops supplying power after the power supply battery supplies power to the main control chip.
The utility model discloses a set up power detection switch circuit, and detect open when commercial power supply stops supplying power to control power supply battery is the main control chip power supply, then control load drive circuit through the main control chip with power supply battery voltage output extremely the power end of power consumption load, thereby detect at the main control chip control when going out water button closure load drive circuit drive load work. The utility model discloses need not to increase the button, when non-outage play water mode and outage play water mode, a play water button of sharing to realize that the electric hot water bottle is after the electricity falls, its water pump normal control goes out water. So, solved and made at the commercial power disconnection condition, need increase independent play water button and power supply drive water pump control and go out water, lead to the circuit board layout wiring degree of difficulty of automatically controlled board to appear two play water buttons on the electric hot water bottle, the function is loaded down with trivial details, user awkward problem.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic diagram of a functional module of an embodiment of the power supply control circuit applied to an electrical apparatus of the present invention;
fig. 2 is a schematic circuit diagram of an embodiment of the power supply control circuit in fig. 1.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a power supply control circuit is applied to in the electrical equipment that has outage play water function.
The electrical equipment can be electrical equipment with the power-off water outlet function, such as an electric thermos bottle, an electric kettle, a water dispenser, an electric water heater and the like. For convenience of explanation, in the following embodiments, the electric hot water bottle is used for explanation.
In a common electric hot water bottle, water outlet is usually controlled by a built-in water pump, and if the electric hot water bottle cannot be continuously supplied with power due to power failure or disconnection of a plug and a mains supply, the water pump cannot be driven, and an independent water outlet button and a power supply are required to be arranged to drive the water pump to work. The water outlet control circuit when the power is cut off and the water outlet control circuit under the power supply of the mains supply are separated, and in the state of the mains supply (non-power-off water outlet mode, also called as a common mode), the mains supply supplies power for a main control chip and various power loads in the electric hot water bottle, and the main control chip and the keys jointly realize various functions of the electric water heater. Under the commercial power disconnection condition (outage play water mode), through independent outage play water key and power supply drive water pump control play water, this kind of outage play water key is mostly established ties between battery and water pump, and battery power exports water key output to who is stupid and drive water pump work through the outage when pressing. In addition, the mode can realize the function of continuous water outlet only by long-time pressing of a key by a user, and the water outlet is unstable due to the fact that the water quantity cannot be adjusted.
In order to solve the problem, the utility model discloses under the condition that does not increase the button, when non-outage goes out water mode and outage play water mode, go out water button of sharing, solve the electric hot water bottle after the electricity falls, its water pump normal control goes out water.
Referring to fig. 1 and 2, in an embodiment of the present invention, the power supply control circuit includes a main control chip 10, a power detection switch circuit 20, a load driving circuit 30 and a power-off water-out/water-out button K1, wherein a detection terminal AC1 of the power detection switch circuit 20 is connected to a mains power supply 100, an input terminal of the power detection switch circuit 20 and an input terminal of the load driving circuit 30 are respectively connected to a power supply battery 200, an output terminal of the power detection switch circuit 20 is connected to a power terminal VCC1 of the main control chip 10, a signal input terminal of the main control chip 10 is connected to the power-off water-out/water-out button K1, a control terminal of the main control chip 10 is connected to a controlled terminal of the load driving circuit 30, a power output terminal of the load driving circuit 30 is connected to a power terminal VCC2 of an electric load 300 in an electrical appliance, the ground signal output terminal of the load driving circuit 30 is connected to the ground terminal of the electrical load 300.
The power-off water outlet/water outlet key K1 is used for outputting a water outlet key signal when being triggered;
the power detection switch circuit 20 is configured to be turned on when detecting that the commercial power supply 100 stops supplying power, so as to control the power supply battery 200 to supply power to the main control chip 10;
the main control chip 10 is configured to control the load driving circuit 30 to output the voltage of the power supply battery 200 to a power supply terminal VCC2 of the electrical load 300 when the commercial power supply 100 stops supplying power; and when the water outlet key signal is received, controlling the load driving circuit 30 to drive the electric load 300 to work.
In this embodiment, one end of the power-off water-out/water-out button K1 is connected to a high level, so that when triggered, a water-out button signal of the high level is output to the main control chip 10. Or one end of the power-off water outlet/outlet key K1 is grounded, the other end is connected with the main control chip 10, when the power-off water outlet/outlet key K1 is triggered, a low-level water outlet key signal is output to the main control chip 10, so that the key signal input by a user is received and the water outlet key signal is output to the main control chip 10 under the condition that the mains supply 100 supplies power or the power supply battery 200 supplies power, the load driving circuit 20 is controlled by the main control chip 10 to drive the water pump to work, and the two keys of the water outlet key and the power-off water outlet key are not required to. So set up, the user only need press outage play water/play water button K1, both steerable main control chip 10 is according to preset water yield, the work of water flow speed control water pump and go out water to solved the button and need establish ties between power supply battery 200 and water pump, stopped the power supply at commercial power supply 100, the user needs the long time of physical mechanical type to press the outage play water button and can realize going out the problem of water.
When detecting that the commercial power supply 100 supplies power normally, the power detection switch circuit 20 keeps an off state, and at this time, the working voltages of the main control chip 10, the water pump and other functional circuit modules are all provided by the commercial power supply 100, and the commercial power supply 100 outputs adapted supply voltage to the main control chip 10 and each power load 300 after the incoming commercial power is subjected to power processing such as rectification, voltage reduction, filtering and the like, for example, the supply voltage of the main control chip 10 is generally 5V, the supply voltage of the water pump is generally 6V, and the supply voltages of other circuits can be 12V, 25V and the like. When it is detected that the commercial power supply 100 stops supplying power to the main control chip 10 and the electric loads 300, that is, the electric hot water bottle is disconnected from the commercial power, the power detection switch circuit 20 is turned from the off state to the on state to output the voltage of the power supply battery 200 to the main control chip 10, so that the main control chip 10 can be powered to continue working or be in a standby state. In this embodiment, the power supply battery 200 may be implemented by a super capacitor, a dry battery, a lithium ion battery or a nickel-metal hydride battery, and the like, and when implemented by a rechargeable battery, the voltage output of the rechargeable battery is preferably 6V, so as to implement that the same battery is used to simultaneously supply power to the main control chip 10 and the water pump. When the super capacitor is adopted, the super capacitor has the characteristics of charging and discharging, can store energy when the mains supply is used for supplying power, and provides electric energy continuation for the main control chip 10 and the water pump after the electric hot water bottle is disconnected from the mains supply, so that the sufficient electric energy continuation is provided with lower cost. Of course, the power supply battery 200 may be other elements as long as the functions of charging and discharging can be satisfied.
When the commercial power supply 100 supplies power normally, the power supply end of the main control chip 10 is electrically connected to the commercial power supply 100, at this time, the power supply voltage of the water pump and the main control chip 10 is provided by the commercial power, and the main control chip 10 controls the load driving circuit 30 to disconnect the electrical connection between the power supply battery 200 and the power load 300.
It should be noted that, when the commercial power supply 100 stops supplying power, and the voltage of the commercial power supply 100 slowly decreases, when the power pin of the main control chip 10 detects that the voltage of the commercial power supply decreases to 5V lower than the supply voltage thereof, for example, to a range of 3.7V to 2.2V, the main control chip 10 controls the load driving circuit 30 to output the voltage of the power supply battery 200 to the power supply terminal VCC2 of the electrical load 300, so as to meet the operation requirement of the water pump.
It can be understood that, the power supply end of the water pump is controlled by the power supply output end of the load driving circuit 30, the ground end of the water pump is controlled by the ground signal output end of the load driving circuit 30, and when the water outlet button signal input by the user is not detected, that is, the power-off water outlet/water outlet button K1 is not triggered, at this time, the main control chip 10 controls the load driving circuit 30 to be in the standby state, the ground end of the water pump is not grounded, but not powered, and the water pump does not work. When a water outlet key signal input by a user is detected, that is, the power-off water outlet/water outlet key K1 is triggered to output a water outlet key signal, the main control chip 10 controls the load driving circuit 30 to drive the ground terminal of the water pump to be grounded, so as to drive the water pump to work. Therefore, even if the electric hot water bottle is disconnected with the mains supply due to power failure or plug, and continuous power supply cannot be obtained, the power supply battery 200 can be used for providing electric energy for the main control chip 10 and the water pump, so that after the electric hot water bottle is disconnected with the mains supply, and a water outlet button signal is output when the power-off water outlet/water outlet button K1 is triggered, the main control chip 10 is used for controlling the load driving circuit 20 to drive the water pump to work, normal water outlet can be realized through the water pump, and the practicability of the electric hot water bottle is improved.
The utility model discloses a set up power detection switch circuit 20, and detect open when commercial power supply 100 stops the power supply to control power supply battery 200 is the power supply of main control chip 10, then control load drive circuit 30 through main control chip 10 with power supply battery 200 voltage output extremely power end VCC2 of power consumption load 300, thereby detect at main control chip 10 and go out the control when water/play button K1 is closed load drive circuit 30 drives power consumption load 300 work. The utility model discloses need not to increase the button, when non-outage play water mode and outage play water mode, a play water button of sharing can realize that the electric hot water bottle is after the electricity falls, and its water pump normally controls out water. So, solved and made at the commercial power disconnection condition, need increase independent play water button and power supply drive water pump control and go out water, lead to the circuit board layout wiring degree of difficulty of automatically controlled board to appear two play water buttons on the electric hot water bottle, the function is loaded down with trivial details, user awkward problem.
Referring to fig. 1 and 2, in a preferred embodiment, the power detection switch circuit 20 includes a first resistor R1, a second resistor R2, a first diode D1 and a first switch Q1, a first end of the first resistor R1 is a detection end of the power detection switch circuit 20, and a second end of the first resistor R1 is connected to an anode of the first diode D1; a cathode of the first diode D1 is interconnected with a controlled terminal of the first switch tube Q1 and a first terminal of the second resistor R2; a second end of the second resistor R2 is grounded; the input end of the first switch tube Q1 is connected to the power supply battery 200, and the output end of the first switch tube Q1 is the output end of the power detection switch circuit 20.
In this embodiment, the first switch Q1 is preferably a PNP transistor, wherein the base of the PNP transistor is the controlled terminal of the first switch Q1, the collector of the PNP transistor is the output terminal of the first switch Q1, and the emitter of the PNP transistor is the output terminal of the first switch Q1. According to the voltage division principle, the larger the ratio of the first resistor R1 to the second resistor R2, the larger the voltage divided by the first resistor R1, so as to realize the output of the detection signal by the first resistor R1 and the second resistor R2. Thus, the on value of the first switch tube Q1 can be adjusted by adjusting the resistance of the first resistor R1 and/or the second resistor R2. When the commercial power supply 100 supplies power normally, the voltage division value of the first resistor R1 and the second resistor R2 exceeds the on-threshold range of the first switch Q1, and the first switch Q1 is in the off state. When the commercial power supply 100 stops supplying power, the voltage value is gradually decreased from high to low in the process of disappearance, the voltage value is output to the first switch tube Q1 after the voltage division processing of the first resistor R1 and the second resistor R2, the first switch tube Q1 is controlled to be turned on when the voltage value is decreased to the range of the turn-on threshold value of the first switch tube Q1, and the first switch tube Q1 keeps the turn-on state when the voltage of the commercial power supply 100 is decreased to 0V. In this embodiment, the resistance value of the first resistor R1 is much smaller than that of the second resistor R2, so that when the utility power supply 100 supplies power normally, the first switch tube Q1 is in the off state, that is, the power supply battery 200 does not discharge to the main control chip 10, and at this time, the main control chip 10 is supplied with power by the utility power supply 100. The first diode D1 is a clamping diode, and is used to prevent the power of the power supply battery 200 from flowing backward into the current loop of the commercial power supply 100 when the power supply battery 200 supplies power to the main control chip 10 through the first switch tube Q1.
Referring to fig. 1 and 2, in the above embodiment, the power detection switch circuit 20 further includes a second diode D2 and a third diode D3, and an anode of the second diode D2 is connected to the power supply battery 200; the cathode of the second diode D2 is connected with the anode of the third diode D3; the cathode of the third diode D3 is connected to the input terminal of the first switch Q1.
It should be noted that, in order to save energy and reduce the size of the electronic control board, when the same power supply battery 200 is used to supply power to the main control chip 10 and the water pump, the operating voltage of the water pump is generally 6V, and the operating voltage of the main control chip 10 is generally 5V, so that the output voltage of the power supply battery 200 is selected to be 6V. In this embodiment, the voltage drop is performed by the second diode D2 and the third diode D3 to ensure that the voltage supplied to the main control chip 10 is less than 5V but not less than the lowest operating voltage of the chip, so as to drive the main control chip 10 to operate normally. Of course, in other embodiments, the voltage reduction may be implemented by using other voltage reduction elements such as a current limiting resistor, a voltage stabilizing diode, and the like, which is limited herein.
Referring to fig. 1 and 2, in a preferred embodiment, the load driving circuit 30 includes a switching signal detecting unit 31, a load power supply switching unit 32 and a load driving unit 33, wherein a detecting end of the switching signal detecting unit 31 is connected to the first control end BT of the main control chip 10, and an output end of the switching signal detecting unit 31 is connected to a controlled end of the load power supply switching unit 32; the output end of the load power supply switch unit 32 is connected to the power supply end VCC2 of the electric load 300; the controlled end of the load driving unit 33 is connected to the second control end PUMP of the main control chip 10, the input end of the load driving unit 33 is grounded, and the output end of the load driving unit 33 is connected to the ground end GND of the electrical load 300; wherein,
the switch signal detection unit 31 is configured to control the load power supply switch unit 32 to be turned on/off according to the control signal output by the main control chip 10;
the load power supply switching unit 32 is configured to control the power supply battery 200 to be electrically connected to the power supply terminal VCC2 of the electrical load 300 when receiving the turn-on output from the switching signal detection unit 31;
the load driving unit 33 is configured to control the ground terminal GND of the electrical load 300 to be grounded when receiving the switch control signal output by the main control chip 10.
In this embodiment, when the commercial power supply 100 works normally, the main control chip 10 outputs a turn-off control signal, and the switch signal detection unit 31 controls the load power supply switch unit 32 to turn off when receiving the turn-off control signal, so as to disconnect the power supply battery 200 from the power supply end of the water pump. At this time, the power supply of the water pump is provided by the commercial power supply 100.
When the commercial power supply 100 stops supplying power, the main control chip 10 outputs a start control signal, and the switch signal detection unit 31 controls the load power supply switch unit 32 to be started when receiving the start control signal, so as to control the power supply battery 200 to be electrically connected with the power end of the water pump. Thereafter, if the main control chip 10 detects a water outlet button signal input by the user, the load driving unit 33 is controlled to be turned on to control the grounding end of the water pump to be grounded, so that the driving operation of the water pump is completed, and when the commercial power supply 100 is powered off, the water pump is driven by the power supply battery 200 to complete the water outlet operation.
Of course, when the utility power supply 100 stops supplying power, the main control chip 10 may also control the load power supply switch unit 32 and the load driving unit 33 to be simultaneously turned on when detecting the water outlet button command input by the user, so as to respectively connect the water pump to the power end and the ground end of the water pump. Therefore, when the water outlet key signal is generated, the main control chip 10 can be in a standby state and is awakened by the water outlet key signal, so that the energy consumption of the power supply control circuit is reduced, and the energy conservation is realized.
Referring to fig. 1 and 2, in the above embodiment, the switching signal detecting unit 31 includes a third resistor R3, a fourth resistor R4 and a second switch Q2, a first end of the third resistor R3 is a detecting end of the switching signal detecting unit 31, and a second end of the third resistor R3 is interconnected with a first end of the fourth resistor R4 and a controlled end of the second switch Q2; a second end of the fourth resistor R4 and the input end of the second switch tube Q2 are grounded; the output end of the second switch tube Q2 is the switch signal detection unit 31.
In this embodiment, the base of the second switching transistor Q2 is preferably a controlled terminal of the driving switch, the emitter of the NPN transistor is an output terminal of the second switching transistor Q2, and the collector of the NPN transistor is an input terminal of the second switching transistor Q2. The third resistor R3 and the fourth resistor R4 divide the voltage to output the switch control signal of the main control chip 10. When the main control chip 10 outputs a low-level switch control signal, the second triode is turned off, and at this time, the third switching tube Q3 is not turned on without a discharge loop, the voltage of the power supply battery 200 cannot be output, and the power supply voltage of the water pump is provided by the commercial power supply 100. When the main control chip 10 outputs a high-level switch control signal, the second switch tube Q2 is turned on, so as to drive the third switch tube Q3 to be turned on, so as to control to electrically connect the power supply battery 200 with the power supply terminal of the water pump.
Referring to fig. 1 and fig. 2, in the above embodiment, the fifth resistor R5, the sixth resistor R6 and the third switching tube Q3, the first end of the fifth resistor R5 is the controlled end of the load power supply switching unit 32 and is interconnected with the first end of the sixth resistor R6 and the input end of the third switching tube Q3, the second end of the fifth resistor R5 is interconnected with the second end of the sixth resistor R6 and the controlled end of the third switching tube Q3, and the output end of the third switching tube Q3 is the output end of the load power supply switching unit 32.
In this embodiment, the fifth resistor R5 and the sixth resistor R6 divide the voltage to drive the third switch Q3 to turn on when the second switch Q2 turns on. The third switching tube Q3 is preferably a PNP transistor, wherein the base of the PNP transistor is the controlled terminal of the third switching tube Q3, the collector of the PNP transistor is the output terminal of the third switching tube Q3, and the emitter of the PNP transistor is the output terminal of the third switching tube Q3.
It can be understood that, in the present embodiment, a two-stage triode switch circuit is adopted to realize that, when the commercial power supply 100 works normally, the power supply battery 200 does not supply power through the third switch tube Q3, so as to prolong the service life of the power supply battery 200. In addition, compared with a control mode that the power supply battery 200 is directly controlled to be the water pump through a key switch, the electronic switch of the triode is adopted, the service life of the triode tube is long, and the triode tube is not easy to damage. This embodiment is based on the control of main control chip 10, detects out the water key signal through main control chip 10 and controls the switching on/off of second switch tube Q2 and third switch tube Q3 to drive the work of water pump, so set up, through the main control chip 10 to the judgement of play water key, can also avoid not having the input of play water key signal, the water pump malfunction goes out water.
Referring to fig. 1 and fig. 2, in the above embodiment, the load driving unit 33 includes a seventh resistor R7, an eighth resistor R8, and a fourth switching tube Q4, a first end of the seventh resistor R7 is a controlled end of the load driving unit 33, and a second end of the seventh resistor R7 is interconnected with a first end of the eighth resistor R8 and a controlled end of the fourth switching tube Q4; a second end of the eighth resistor R8 and an input end of the fourth switching tube Q4 are both grounded, and an output end of the fourth switching tube Q4 is an output end of the load driving unit 33.
In this embodiment, the base of the second switching transistor Q2 is preferably a controlled terminal of the driving switch, the emitter of the NPN transistor is an input terminal of the second switching transistor Q2, and the collector of the NPN transistor is an output terminal of the second switching transistor Q2. The seventh resistor R7 and the eighth resistor R8 are connected in series to divide voltage, so that when receiving a switch control signal output by the single chip microcomputer, the fourth switch tube Q4 is controlled to be turned on, and the fourth switch tube Q4 controls the ground terminal GND of the electric load 300 to be grounded.
Further, in the above embodiment, the load driving circuit 30 further includes a fourth diode D4 and a fifth diode D5, an anode of the fourth diode D4 is connected to the commercial power supply 100, and a cathode of the fourth diode D4 is connected to a cathode of the fifth diode D5 and the output terminal of the load power supply switch unit 32; an anode of the fifth diode D5 is connected to an output terminal of the load driving unit 33.
In this embodiment, the fourth diode D4 is used for flowing the voltage of the power supply battery 200 back to the current loop of the utility power supply 100 when the utility power supply 100 stops supplying power and the power supply battery 200 supplies power to the water pump. It is understood that the water pump is an inductive device, and the fifth diode D5 is a freewheeling diode for releasing the power stored in the water pump when the power supply battery 200 stops supplying power to the water pump.
It can be understood that, in the above embodiment, the connection terminal CN1 is further connected in series between the water pump and the load driving circuit 30, so that the water pump and the load driving circuit 30 can be detachably connected to facilitate the installation and the detachment of the electric hot water bottle.
It should also be understood that, in the above embodiments, each switching tube may also be implemented by using another switching tube, such as a MOS tube, and the like, which is not limited herein.
The utility model also provides an electrical equipment, reach as above including commercial power supply, power consumption load, play water button and power supply control circuit. The detailed structure of the electrical equipment can refer to the above embodiments, and is not described herein again; it can be understood that, because the utility model discloses above-mentioned electrical equipment has been used among the electrical equipment, consequently, the utility model discloses electrical equipment's embodiment includes all technical scheme of the whole embodiments of above-mentioned electrical equipment, and the technological effect that reaches is also identical, no longer gives unnecessary details here.
The commercial power supply is respectively connected with the power load and the detection end of the power supply control circuit, and the power output end of the power supply control circuit is connected with the power load.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.
Claims (9)
1. A power supply control circuit is applied to electrical equipment with a power-off water outlet function and is characterized in that the power supply control circuit comprises a main control chip (10), a power supply detection switch circuit (20), a load driving circuit (30) and a power-off water outlet/water outlet key (K1), the detection end of the power supply detection switch circuit (20) is connected with a mains supply power supply (100), the input end of the power supply detection switch circuit (20) and the input end of the load driving circuit (30) are respectively connected with a power supply battery (200), the output end of the power supply detection switch circuit (20) is connected with the power supply end of the main control chip (10), the signal input end of the main control chip (10) is connected with the power-off water outlet/water outlet key (K1), and the control end of the main control chip (10) is connected with the controlled end of the load driving circuit (30), the power supply output end of the load driving circuit (30) is connected with the power supply end of an electric load (300) in the electrical equipment, and the grounding signal output end of the load driving circuit (30) is connected with the grounding end of the electric load (300); wherein,
the power-off water outlet/water outlet key (K1) is used for outputting a water outlet key signal when being triggered;
the power supply detection switch circuit (20) is used for being started when the fact that the commercial power supply (100) stops supplying power is detected, so that the power supply battery (200) is controlled to supply power to the main control chip (10);
the main control chip (10) is configured to control the load driving circuit (30) to output the voltage of the power supply battery (200) to a power end of the power consumption load (300) when it is detected that the commercial power supply (100) stops supplying power; and when the water outlet key signal is received, controlling the load driving circuit (30) to drive the electric load (300) to work.
2. The power supply control circuit according to claim 1, wherein the power detection switch circuit (20) comprises a first resistor (R1), a second resistor (R2), a first diode (D1) and a first switch transistor (Q1), a first end of the first resistor (R1) is a detection end of the power detection switch circuit (20), and a second end of the first resistor (R1) is connected to an anode of the first diode (D1); a cathode of the first diode (D1) is interconnected with a controlled terminal of the first switch tube (Q1) and a first terminal of the second resistor (R2); a second terminal of the second resistor (R2) is grounded; the input end of the first switch tube (Q1) is connected with the power supply battery (200), and the output end of the first switch tube (Q1) is the output end of the power supply detection switch circuit (20).
3. The power supply control circuit according to claim 2, wherein the power supply detection switch circuit (20) further includes a second diode (D2) and a third diode (D3), an anode of the second diode (D2) being connected to the power supply battery (200); the cathode of the second diode (D2) is connected to the anode of the third diode (D3); the cathode of the third diode (D3) is connected with the input end of the first switch tube (Q1).
4. The power supply control circuit according to claim 1, wherein the load driving circuit (30) comprises a switching signal detection unit (31), a load power supply switching unit (32) and a load driving unit (33), a detection end of the switching signal detection unit (31) is connected with the first control end of the main control chip (10), and an output end of the switching signal detection unit (31) is connected with a controlled end of the load power supply switching unit (32); the output end of the load power supply switch unit (32) is connected with the power supply end of the electric load (300); the controlled end of the load driving unit (33) is connected with the second control end of the main control chip (10), the input end of the load driving unit (33) is grounded, and the output end of the load driving unit (33) is connected with the ground end of the electric load (300); wherein,
the switch signal detection unit (31) is used for controlling the on/off of the load power supply switch unit (32) according to the control signal output by the main control chip (10);
the load power supply switch unit (32) is used for controlling the power supply battery (200) to be electrically connected with a power supply end of the power load (300) when receiving the on output by the switch signal detection unit (31);
and the load driving unit (33) is used for controlling the grounding end of the electric load (300) to be grounded when receiving the switch control signal output by the main control chip (10).
5. The power supply control circuit according to claim 4, wherein the switching signal detecting unit (31) comprises a third resistor (R3), a fourth resistor (R4) and a second switch tube (Q2), a first terminal of the third resistor (R3) is a detecting terminal of the switching signal detecting unit (31), and a second terminal of the third resistor (R3) is interconnected with a first terminal of the fourth resistor (R4) and a controlled terminal of the second switch tube (Q2); a second end of the fourth resistor (R4) and an input end of the second switch tube (Q2) are grounded; the output end of the second switch tube (Q2) is the switch signal detection unit (31).
6. The power supply control circuit of claim 4, wherein the load power supply switch unit (32) comprises a fifth resistor (R5), a sixth resistor (R6) and a third switch tube (Q3), a first end of the fifth resistor (R5) is a controlled end of the load power supply switch unit (32) and is interconnected with a first end of the sixth resistor (R6) and an input end of the third switch tube (Q3), a second end of the fifth resistor (R5) is interconnected with a second end of the sixth resistor (R6) and a controlled end of the third switch tube (Q3), and an output end of the third switch tube (Q3) is an output end of the load power supply switch unit (32).
7. The power supply control circuit according to claim 4, wherein the load driving unit (33) comprises a seventh resistor (R7), an eighth resistor (R8) and a fourth switching tube (Q4), a first end of the seventh resistor (R7) is a controlled end of the load driving unit (33), and a second end of the seventh resistor (R7) is interconnected with a first end of the eighth resistor (R8) and a controlled end of the fourth switching tube (Q4); the second end of the eighth resistor (R8) and the input end of the fourth switching tube (Q4) are both grounded, and the output end of the fourth switching tube (Q4) is the output end of the load driving unit (33).
8. The power supply control circuit according to any one of claims 5 to 7, wherein the load driving circuit (30) further comprises a fourth diode (D4) and a fifth diode (D5), an anode of the fourth diode (D4) is connected to the mains power supply (100), a cathode of the fourth diode (D4) is connected to a cathode of the fifth diode (D5) and the output terminal of the load power switch unit (32); an anode of the fifth diode (D5) is connected to an output terminal of the load driving unit (33).
9. An electrical apparatus, characterized in that, includes commercial power supply (100), power consumption load (300), outage play water/play water button (K1) and according to the power supply control circuit of any one of claims 1 to 8, commercial power supply (100) respectively with power consumption load (300) and power supply control circuit's sense terminal is connected, power supply control circuit's power output end with power consumption load (300) are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721475024.8U CN207490595U (en) | 2017-11-07 | 2017-11-07 | Power-supplying circuit and electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721475024.8U CN207490595U (en) | 2017-11-07 | 2017-11-07 | Power-supplying circuit and electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207490595U true CN207490595U (en) | 2018-06-12 |
Family
ID=62476008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721475024.8U Withdrawn - After Issue CN207490595U (en) | 2017-11-07 | 2017-11-07 | Power-supplying circuit and electrical equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207490595U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109756021A (en) * | 2017-11-07 | 2019-05-14 | 广东美的生活电器制造有限公司 | Power-supplying circuit and electrical equipment |
| CN114039587A (en) * | 2022-01-11 | 2022-02-11 | 深圳市微源半导体股份有限公司 | Shutdown control circuit, battery protection chip and electronic equipment |
-
2017
- 2017-11-07 CN CN201721475024.8U patent/CN207490595U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109756021A (en) * | 2017-11-07 | 2019-05-14 | 广东美的生活电器制造有限公司 | Power-supplying circuit and electrical equipment |
| CN109756021B (en) * | 2017-11-07 | 2024-07-19 | 广东美的生活电器制造有限公司 | Power supply control circuit and electrical equipment |
| CN114039587A (en) * | 2022-01-11 | 2022-02-11 | 深圳市微源半导体股份有限公司 | Shutdown control circuit, battery protection chip and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5387858A (en) | Energy-conserving multiple power source and method for battery-operated products | |
| CN110098652B (en) | Mobile phone, mobile phone main body device and mobile phone endurance device | |
| CN109756021B (en) | Power supply control circuit and electrical equipment | |
| CN103066822A (en) | Power supply starting circuit | |
| CA2736573A1 (en) | A usb charger, its switch control system and method, and a usb interface charger for a laptop | |
| CN207490595U (en) | Power-supplying circuit and electrical equipment | |
| CN210669590U (en) | Lithium battery management application circuit | |
| CN216751719U (en) | Multi-key awakening identification circuit and electronic equipment | |
| CN222073142U (en) | Interface multiplexing circuit | |
| CN210742886U (en) | Startup and shutdown circuit | |
| CN109327061B (en) | Battery power supply circuit | |
| CN207339408U (en) | Low-power consumption standby circuit | |
| CN216751700U (en) | Switching circuit, energy storage equipment and consumer | |
| CN217467616U (en) | Power supply control circuit and electronic device | |
| CN216526819U (en) | Multi-key awakening identification circuit and electronic equipment | |
| CN215817607U (en) | Power supply circuit and remote control device | |
| CN206162374U (en) | Simply stabilize lossless button switch circuit | |
| CN111669158B (en) | Portable multifunctional switch circuit | |
| CN212413131U (en) | Power-off and reset circuit and intelligent central control | |
| CN223156748U (en) | Charging management system and electronic equipment | |
| CN113612949B (en) | DC power supply switching circuit and television | |
| CN217984625U (en) | Mechanical switch normally closed state disconnection back-stage power supply control circuit | |
| CN211207117U (en) | Hard switching circuit and mobile terminal | |
| CN206164702U (en) | Current switching circuit, television power panel, television mainboard and television | |
| CN220290078U (en) | Multi-voltage output circuit and energy storage power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180612 Effective date of abandoning: 20240719 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180612 Effective date of abandoning: 20240719 |