Working circuit of portable rechargeable aromatherapy machine and portable rechargeable aromatherapy machine

Abstract

The present invention discloses a working circuit of a portable rechargeable aromatherapy machine and a portable rechargeable aromatherapy machine. The working circuit of the portable rechargeable aromatherapy machine includes a power input terminal, a power supply circuit, a first voltage detection circuit, a control circuit and a charging current switching circuit. The input terminal of the power supply circuit is connected to the power input terminal, the detection terminal of the first voltage detection circuit is connected to the power input terminal, and the current detection terminal of the control circuit is connected to the output terminal of the first voltage detection circuit. The input terminal of the charging current switching circuit is connected to the output terminal of the power supply circuit, the output terminal of the charging current switching circuit is connected to the input and output terminals of a power storage device, and the controlled terminal of the charging current switching circuit is connected to the current control signal output terminal of the control circuit. The present invention is used to solve the technical problem that the existing portable rechargeable aromatherapy machine has a long charging time.

Description

Technical Field

[0001] The invention relates to the technical field of portable rechargeable aromatherapy machines, and in particular to a working circuit of the portable rechargeable aromatherapy machine and the portable rechargeable aromatherapy machine. Background Art

[0002] Portable rechargeable aromatherapy machine, in simple terms, is a device that turns water mixed with essential oils into water vapor and diffuses it indoors. Portable rechargeable aromatherapy machines have many different appearances. Portable rechargeable aromatherapy machines generally place essential oils and water in a special container, and heat it under a dish by fire to form a mixed vapor of essential oils and water to diffuse into the air. Of course, this kind of portable rechargeable aromatherapy machine has great hidden dangers in terms of safety and ease of operation. Therefore, portable rechargeable aromatherapy machines that use electrical energy have appeared in our current life.

[0003] Since portable rechargeable aromatherapy machines can be used in a wide range of occasions, more and more users are using them. Existing portable rechargeable aromatherapy machines work by plugging directly into a power source, and some portable rechargeable aromatherapy machines also have a charging function. However, due to performance limitations, the charging speed of portable rechargeable aromatherapy machines is slow, resulting in a long charging time. Summary of the invention

[0004] The main purpose of the present invention is to provide a working circuit of a portable rechargeable aromatherapy machine, aiming to solve the technical problem that the existing portable rechargeable aromatherapy machines have a long charging time.

[0005] To achieve the above object, the present invention provides a working circuit of a portable rechargeable aromatherapy machine, the working circuit of the portable rechargeable aromatherapy machine comprising:

[0006] Power input terminal;

[0007] A power supply circuit, the input end of which is connected to the power input end and is used to step down the power input of the power supply to a preset voltage;

[0008] a first voltage detection circuit, wherein a detection end of the first voltage detection circuit is connected to the power input end and is used to detect an input voltage value of the power input end;

[0009] A control circuit, wherein the control circuit has a current detection terminal, the current detection terminal of the control circuit is connected to the output terminal of the first voltage detection circuit, and is used to output a corresponding current control signal according to the input voltage value;

[0010] A charging current switching circuit, wherein the charging current switching circuit has an input end, an output end and a controlled end, the input end of the charging current switching circuit is connected to the output end of the power supply circuit, the output end of the charging current switching circuit is connected to the input and output ends of the power storage device, and the controlled end of the charging current switching circuit is connected to the current control signal output end of the control circuit, and is used to output an output current value corresponding to the control signal to the power storage device according to the control signal.

[0011] Optionally, the charging current switching circuit includes a shunt branch and a switch branch, the switch branch has an input end, an output end and a controlled end, the input end of the switch branch is connected to the input end of the shunt branch, and the connection node thereof is the input end of the charging current switching circuit, the output end of the switch branch is connected to the output end of the shunt branch, and the connection node thereof is the output end of the charging current switching circuit, and the controlled end of the switch branch is the controlled end of the charging current switching circuit;

[0012] The shunt branch is used to shunt the charging power supply current;

[0013] The switch branch is used to be turned on or off according to the control signal, and to short-circuit the shunt branch when turned on.

[0014] Optionally, the working circuit of the portable rechargeable aromatherapy machine further includes a boost circuit, and the control circuit further includes a discharge control signal output terminal, and the discharge control signal output terminal of the boost circuit is connected to the controlled terminal of the boost circuit;

[0015] The control circuit is also used to output a discharge control signal;

[0016] The boost circuit is used for discharging after boosting the input voltage according to the discharge control signal.

[0017] Optionally, the working circuit of the portable rechargeable aromatherapy machine further includes an atomization circuit, the control circuit further includes an atomization control signal output terminal and an atomization state detection terminal, the feedback terminal of the atomization circuit is connected to the atomization state detection terminal of the control circuit, the atomization control signal output terminal of the atomization circuit is connected to the controlled terminal of the atomization circuit, and the power supply terminal of the atomization circuit is connected to the output terminal of the boost circuit;

[0018] The control circuit is further used to obtain the atomization state feedback signal and output an atomization control signal according to the atomization state feedback signal;

[0019] The atomization circuit is used to drive the atomization head to atomize liquid at a preset oscillation frequency according to the atomization control signal.

[0020] Optionally, the working circuit of the portable rechargeable aromatherapy machine further includes a second voltage detection circuit, the control circuit further includes a level detection input terminal, and the level detection input terminal of the second voltage detection circuit is connected to the output terminal of the second voltage detection circuit;

[0021] The second voltage detection circuit is used to detect the voltage value of the power storage device;

[0022] The control circuit is also used to control the power supply circuit to stop working when the voltage value reaches a preset threshold voltage.

[0023] Optionally, the working circuit of the portable rechargeable aromatherapy machine further includes an LED working circuit, the control circuit further includes an LED driving signal output terminal, the driving signal output terminal of the control circuit is connected to the input terminal of the LED working circuit, and the power supply terminal of the LED working circuit is connected to the output terminal of the boost circuit;

[0024] The control circuit is also used to output a corresponding LED driving signal according to the working state of the working circuit of the portable rechargeable aromatherapy machine;

[0025] The LED working circuit is used to light up the corresponding LED lamp according to the LED driving signal.

[0026] Optionally, the working circuit of the portable rechargeable aromatherapy machine further includes a fan driving circuit, the control circuit further includes a fan driving signal output terminal, the input terminal of the fan driving circuit is connected to the fan driving signal output terminal of the control circuit, and the power supply terminal of the fan driving circuit is connected to the output terminal of the boost circuit;

[0027] The control circuit is also used to output a fan driving signal;

[0028] The fan driving circuit is used to drive the fan according to the fan driving signal.

[0029] Optionally, the working circuit of the portable rechargeable aromatherapy machine further includes a switch circuit, and the control circuit further includes a switch signal input terminal, and the switch signal input terminal of the control circuit is connected to the output terminal of the switch circuit;

[0030] The switch circuit is used to input a variety of control signals;

[0031] The control circuit is also used to control the start-up of the portable rechargeable aromatherapy machine according to the control signal.

[0032] The present invention further provides a portable rechargeable aromatherapy machine, which includes the working circuit of the portable rechargeable aromatherapy machine as described above.

[0033] Optionally, the portable rechargeable aromatherapy machine further comprises a power storage device, and the power storage device is electrically connected to an output end of a charging current switching circuit of the portable rechargeable aromatherapy machine.

[0034] The working circuit of the portable rechargeable aromatherapy machine of the present invention includes a power input terminal, a power supply circuit, a first voltage detection circuit, a control circuit and a charge current switching circuit. Among them, the power supply circuit steps down the power input of the power supply to a preset voltage, the first voltage detection circuit detects the input voltage value of the power input terminal, the control circuit outputs a corresponding current control signal according to the input voltage value, and the charge current switching circuit outputs an output current value corresponding to the control signal to the power storage device according to the control signal. Through the above scheme, the technical scheme of the present application can control the output current value of the working circuit of the portable rechargeable aromatherapy machine to change when the input voltage value changes, thereby realizing stable charging of the power storage device, and increasing the output current value when the input voltage value is large. It is also possible to reduce the output current value when the input voltage value is small, so that there is no need to directly shut down the charging process when the current is too large, so as to speed up the charging speed, thereby solving the technical problem of the long charging time of the existing portable rechargeable aromatherapy machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0036] Figure 1 It is a module schematic diagram of the working circuit of the portable rechargeable aromatherapy machine of the present invention;

[0037] Figure 2 A schematic diagram of a working circuit of a portable rechargeable aromatherapy machine in an exemplary technology;

[0038] Figure 3 It is a circuit diagram of a power supply circuit and a charging current switching circuit in the working circuit of the portable rechargeable aromatherapy machine of the present invention;

[0039] Figure 4 It is a circuit diagram of a first voltage detection circuit in the working circuit of the portable rechargeable aromatherapy machine of the present invention;

[0040] Figure 5 It is a circuit diagram of a control circuit in a working circuit of a portable rechargeable aromatherapy machine of the present invention;

[0041] Figure 6It is a circuit diagram of a charging circuit in a working circuit of a portable rechargeable aromatherapy machine of the present invention;

[0042] Figure 7 It is a circuit diagram of an atomization circuit in a working circuit of a portable rechargeable aromatherapy machine of the present invention;

[0043] Figure 8 It is a circuit diagram of a second voltage detection circuit in the working circuit of the portable rechargeable aromatherapy machine of the present invention;

[0044] Fig. 9 It is a circuit diagram of an LED working circuit in the working circuit of the portable rechargeable aromatherapy machine of the present invention;

[0045] Fig.10 It is a circuit diagram of a fan driving circuit in the working circuit of the portable rechargeable aromatherapy machine of the present invention;

[0046] Fig.11 The diagram is a circuit diagram of a switch circuit in the working circuit of the portable rechargeable aromatherapy machine of the present invention.

[0047] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. If there are descriptions of "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0049] The present invention provides a working circuit of a portable rechargeable aromatherapy machine to solve the technical problem that the charging time of the existing portable rechargeable aromatherapy machine is long.

[0050] In one embodiment, if Figure 1As shown, the working circuit of the portable rechargeable aromatherapy machine includes a power input terminal 10, a power supply circuit 20, a first voltage detection circuit 30, a control circuit 50 and a charging current switching circuit 40, the input terminal of the power supply circuit 20 is connected to the power input terminal 10, the detection terminal of the first voltage detection circuit 30 is connected to the power input terminal 10, the control circuit 50 has a current detection terminal, the current detection terminal of the control circuit 50 is connected to the output terminal of the first voltage detection circuit 30, the charging current switching circuit 40 has an input terminal, an output terminal and a controlled terminal, the input terminal of the charging current switching circuit 40 is connected to the output terminal of the power supply circuit 20, the output terminal of the charging current switching circuit 40 is connected to the input and output terminals of the power storage device 60, and the controlled terminal of the charging current switching circuit 40 is connected to the current control signal output terminal of the control circuit 50.

[0051] Among them, the power supply circuit 20 steps down the power input of the power supply to a preset voltage, the first voltage detection circuit 30 detects the input voltage value of the power input terminal 10, the control circuit 50 outputs a corresponding current control signal according to the input voltage value, and the charging current switching circuit 40 outputs an output current value corresponding to the control signal to the power storage device 60 according to the control signal. Through the above scheme, the technical scheme of the present application can control the output current value of the working circuit of the portable rechargeable aromatherapy machine to change when the input voltage value changes, thereby realizing stable charging of the power storage device 60, and increasing the output current value when the input voltage value is large. It is also possible to reduce the output current value when the input voltage value is small, so that there is no need to directly shut down the charging process when the current is too large. In order to speed up the charging speed, the technical problem of the long charging time of the existing portable rechargeable aromatherapy machine is solved.

[0052] Based on the above management process, a specific embodiment that can be realized is provided below, in which two voltage thresholds are set, namely, the first voltage threshold and the second voltage threshold, the first voltage threshold < the second voltage threshold, when the detected input voltage value is less than the first voltage threshold, it indicates that the power supply circuit 20 is working in a relatively large current state at this time, and the first current control signal is output to control the charging current switching circuit to output the first current, when the detected input voltage value is between the first voltage threshold and the second voltage threshold (the input voltage value is greater than or equal to the first voltage threshold and the input voltage value is less than or equal to the second voltage threshold), the second current control signal is output to control the charging current switching circuit to output the second current, when the detected input voltage value is greater than the second voltage threshold, it indicates that the power supply circuit 20 is working in a relatively small current state, and the third current control signal is output to control the charging current switching circuit to output the third current, at this time, the values ​​of the first current, the second current and the third current can be set according to the actual application scenario, and are not limited here. It is worth noting that multiple voltage thresholds can be set according to actual needs, and then the current switching can be realized according to the threshold, which will not be repeated here.

[0053] Alternatively, if Figure 3 As shown, the power supply circuit 20 includes a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2, a first inductor L1, a first diode D1 and a first chip U1. The first chip U1 includes an enable pin TS, a ground pin GND, a battery voltage detection pin BAT, a power output pin VCC, a switch pin LX, a power input pin VIN and an input current detection pin CHRG. The enable pin TS of the first chip U1 is connected to the first end of the first resistor R1, the ground pin GND of the first chip U1 is grounded through the second resistor R2, and the battery voltage of the first chip U1 The detection pin BAT, the first end of the second capacitor C2, and the cathode of the first diode D1 are connected to the input and output ends of the power storage device 60, the power output pin VCC of the first chip U1 is connected to the first end of the first inductor L1, and the connection node is the output end of the power supply circuit 20, the switch pin LX of the first chip U1 is connected to the second end of the first inductor L1, the input current detection pin CHRG of the first chip U1 is connected to the first end of the third resistor R3, the second end of the first resistor R1, the second end of the third resistor R3, and the power input pin VIN of the first chip U1 are respectively connected to the power input terminal 10. The second end of the second capacitor C2, the anode of the first diode D1, and the second end of the first capacitor C1 are all grounded.

[0054] The power supply circuit 20 divides the power output from the power input terminal 10 through the first chip U1, the first capacitor C1 and the second capacitor C2 can filter out noise, and the first diode D1 realizes the output voltage stabilization to ensure the stability of the output voltage of the output terminal of the power supply circuit 20. Optionally, the model of the first chip U1 is SLM6500.

[0055] Alternatively, if Figure 4 As shown, the first voltage detection circuit 30 includes a fourth resistor R4, a fifth resistor R5, and a third capacitor C3, the first end of the fourth resistor R4 is the detection end of the first voltage detection circuit 30, the second end of the fourth resistor R4, the first end of the fifth resistor R5, and the first end of the third capacitor C3 are respectively connected, and the connection node is the output end of the first voltage detection circuit 30. The second end of the fifth resistor R5 and the second end of the third capacitor C3 are both grounded.

[0056] The fourth resistor R4 and the fifth resistor R5 are connected in series to divide the power supply voltage to reduce the current, thereby making the detection process safer. The third capacitor C3 is added to filter certain high-frequency signals to reduce damage to the control circuit 50.

[0057] Alternatively, if Figure 5As shown, the control circuit 50 is composed of a second chip U2 and a third chip U3. The second chip U2 is an MCU chip, and the third chip U3 can be a low-cost control chip, which can independently realize the control of the charging current switching circuit 40. The specific connection relationship between the second chip U2 and the third chip U3 and other components can be referred to Figure 1 Name the connection ends in and connect the ports with the same name. I will not go into details here.

[0058] In one embodiment, if Figure 2 As shown, the charging current switching circuit 40 includes a shunt branch 401 and a switch branch 402, the switch branch 402 has an input end, an output end and a controlled end, the input end of the switch branch 402 is connected to the input end of the shunt branch 401, and the connection node is the input end of the charging current switching circuit 40, the output end of the switch branch 402 is connected to the output end of the shunt branch 401, and the connection node is the output end of the charging current switching circuit 40, and the controlled end of the switch branch 402 is the controlled end of the charging current switching circuit 40.

[0059] The shunt branch 401 shunts the charging power supply current. The switch branch 402 is turned on or off according to the control signal. When the switch branch 402 is turned on, the switch branch 402 short-circuits the shunt branch 401, thereby reducing the resistance of the shunt branch 401 and causing the charging current switching circuit 40 to output a large current. When the switch branch 402 is turned off, the shunt branch 401 is connected to the circuit, increasing the resistance of the charging current switching circuit 40, thereby reducing the current at the output end of the charging current switching circuit 40.

[0060] Optionally, the charging current switching circuit 40 further includes a voltage dividing branch 403 , which is connected between the output end of the current dividing branch 401 and the input and output ends of the power storage device 60 .

[0061] The voltage dividing branch 403 reduces the current output by the shunt branch 401 and the switch branch 402 .

[0062] Alternatively, if Figure 3 As shown, the voltage dividing branch 403 includes an eighth resistor R8 , a first end of the eighth resistor R8 is the output end of the charge current switching circuit 40 , and a second end of the eighth resistor R8 is connected to the output end of the current dividing branch 401 .

[0063] Alternatively, if Figure 3 As shown, the shunt branch 401 includes a ninth resistor R9 , a first end of the first resistor R1 is an output end of the shunt branch 401 , and a second end of the first resistor R1 is an input end of the shunt branch 401 .

[0064] Alternatively, if Figure 3As shown, the switch branch 402 includes a first switch tube Q1, the input end of the first switch tube Q1 is the input end of the switch branch 402, the output end of the first switch tube Q1 is the output end of the switch branch 402, and the controlled end of the first switch tube Q1 is the controlled end of the switch branch 402.

[0065] The switch branch 402 is set as the first switch tube Q1, so that its opening and closing can be conveniently controlled, and the charging and discharging performance can be greatly improved by selecting a suitable switch tube.

[0066] In one embodiment, if Figure 2 As shown, the working circuit of the portable rechargeable aromatherapy machine also includes a boost circuit 80 , and the control circuit 50 also has a discharge control signal output terminal, and the discharge control signal output terminal of the control circuit 50 is connected to the controlled terminal of the boost circuit 80 .

[0067] The control circuit 50 outputs a discharge control signal, and the boost circuit 80 discharges after boosting the input voltage according to the discharge control signal, thereby achieving controllable discharge process.

[0068] Alternatively, if Figure 6 As shown, the boost circuit includes a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a second switch tube Q2, a third switch tube Q3, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, an eleventh capacitor C11, a third inductor L3, a second diode D2, a third diode D3 and a fourth chip U4. The specific connection relationship is referenced Figure 6 .

[0069] Among them, the second diode D2 is an indicator light, which can prompt the user that there is a charging power input, and the third diode D3 is a voltage regulator diode, which can stabilize the input voltage. The control circuit 50 or the switch circuit can control the operation of the boost circuit 80 by controlling the opening or closing of the third switch tube Q3. When the third switch tube Q3 is turned on, the fourth chip U4 starts to work, that is, the boost circuit 80 works normally. Optionally, the model of the fourth chip U4 is SE3578.

[0070] In one embodiment, if Figure 2 As shown, the working circuit of the portable rechargeable aromatherapy machine also includes an atomization circuit 90, and the control circuit 50 also has an atomization control signal output terminal and an atomization state detection terminal. The feedback terminal of the atomization circuit 90 is connected to the atomization state detection terminal of the control circuit, the atomization control signal output terminal of the atomization circuit 90 is connected to the controlled terminal of the atomization circuit 90, and the power supply terminal of the atomization circuit 90 is connected to the output terminal of the boost circuit 80.

[0071] The control circuit 50 outputs an atomization control signal, and the atomization circuit 90 drives the atomization head to atomize the liquid at a preset oscillation frequency according to the atomization control signal.

[0072] Alternatively, if Figure 7 As shown, the atomization circuit 90 includes a fourth switch tube Q4, a fifth switch tube Q5, a sixth switch tube Q6, a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fourth resistor R24, a twenty-fifth resistor R25, a twenty-sixth resistor R26, a second inductor L2, a ninth capacitor C9 and a tenth capacitor C10. The specific connection relationship can be referred to Figure 7 .

[0073] The fourth switch tube Q4 and the fifth switch tube Q5 are totem pole circuits, which can output high and low level signals to subsequent circuits when they are turned on separately, thereby controlling the on or off of the sixth switch tube Q6 to switch the working power of the atomizer sheet.

[0074] In one embodiment, the working circuit of the portable rechargeable aromatherapy machine further includes a second voltage detection circuit, and the control circuit 50 further includes a level detection input terminal, and the level detection input terminal of the second voltage detection circuit is connected to the output terminal of the second voltage detection circuit.

[0075] The second voltage detection circuit detects the voltage value of the power storage device 60 , and the control circuit 50 controls the power supply circuit 20 to stop working when the voltage value reaches a preset threshold voltage. The threshold voltage is set according to the actual capacity of the power storage device 60 .

[0076] Alternatively, if Figure 8 As shown, the second voltage detection circuit includes a sixth resistor R6, a seventh resistor R7, and a fourth capacitor C4, the first end of the sixth resistor R6 is the detection end of the first voltage detection circuit 30, the second end of the sixth resistor R6, the first end of the seventh resistor R7, and the first end of the fourth capacitor C4 are respectively connected, and the connection node is the output end of the first voltage detection circuit 30. The second end of the seventh resistor R7 and the second end of the fourth capacitor C4 are both grounded.

[0077] The sixth resistor R6 and the seventh resistor R7 are connected in series to divide the power supply voltage to reduce the current, thereby making the detection process safer. The fourth capacitor C4 is added to filter certain high-frequency signals to reduce damage to the control circuit 50.

[0078] In one embodiment, if Figure 2As shown, the working circuit of the portable rechargeable aromatherapy machine also includes an LED working circuit 100, and the control circuit 50 also has an LED driving signal output end. The driving signal output end of the control circuit 50 is connected to the input end of the LED working circuit 100, and the power supply end of the LED working circuit 100 is connected to the output end of the boost circuit 80.

[0079] The boost circuit 80 provides working power for the LED working circuit 100, the control circuit 50 outputs a corresponding LED driving signal according to the working state of the working circuit of the portable rechargeable aromatherapy machine, and the LED working circuit 100 lights up the corresponding LED lamp according to the LED driving signal.

[0080] Alternatively, if Fig. 9 As shown, the LED working circuit 100 includes a twenty-fifth resistor R25, a twenty-sixth resistor R26, and a twenty-seventh resistor R27. The first end of each resistor is connected to a control pin of the first chip U1 one-to-one, and the second end of each resistor is connected to an LED lamp one-to-one. Thus, the user can be prompted with the working state of the working circuit of the portable rechargeable aromatherapy machine in different working states. For example, the LED lamp connected to the twenty-fifth resistor R25 is lit when high current charging is controlled. Thus, the user can intuitively know the working state of the working circuit of the portable rechargeable aromatherapy machine.

[0081] In one embodiment, if Figure 2 As shown, the working circuit of the portable rechargeable aromatherapy machine also includes a fan drive circuit 200, and the control circuit 50 also has a fan drive signal output end. The input end of the fan drive circuit 200 is connected to the fan drive signal output end of the control circuit 50, and the power supply end of the fan drive circuit 200 is connected to the output end of the boost circuit 80.

[0082] The boost circuit 80 provides working power to the fan driving circuit 200 , the control circuit 50 outputs a fan driving signal, and the fan driving circuit 200 drives the fan according to the fan driving signal.

[0083] Alternatively, if Fig.10 As shown, the fan driving circuit 200 includes a 28th resistor R28 and a 7th switch tube Q7, the first end of the 28th resistor R28 is the input end of the fan driving circuit 200, the second end of the 28th resistor R28 is connected to the controlled end of the 7th switch tube Q7, the input end of the 7th switch tube Q7 is the output end of the fan driving circuit 200, and a fan is connected between the input end of the 7th switch tube Q7 and the power supply. The output end of the 7th switch tube Q7 is grounded.

[0084] The conduction current of the seventh switch tube Q7 can be changed by changing the input signal of the fan driving circuit 200, so that the rotation speed of the fan can be controlled.

[0085] In one embodiment, if Figure 2 As shown, the working circuit of the portable rechargeable aromatherapy machine also includes a switch circuit 300 , and the control circuit 50 also has a switch signal input terminal, and the switch signal input terminal of the control circuit 50 is connected to the output terminal of the switch circuit 300 .

[0086] The switch circuit 300 inputs a variety of control signals, and the control circuit 50 controls the start-up of the portable rechargeable aromatherapy machine according to the control signals.

[0087] Alternatively, if Fig.11 As shown, the switch circuit 300 includes an eighth switch tube Q8, a ninth switch tube Q9, a twenty-ninth resistor R29 and a thirtieth resistor R30.

[0088] The operation of the boost circuit 80 can be directly controlled by the switch circuit 300 , and the switch circuit 300 can also be connected to the control circuit 50 to control the normal operation of the working circuit of the portable rechargeable aromatherapy machine.

[0089] Optionally, the model of the eighth switch tube Q8 is BAT54C.

[0090] The following combination Figure 1 , 3 The working principle of the present invention is described as follows:

[0091] Among them, the output current value (charging current IBAT) is determined by the resistance values ​​of the eighth resistor R8 and the ninth resistor R9. The larger the resistance values ​​of the eighth resistor R8 and the ninth resistor R9, the smaller the charging current. Therefore, to change the size of the charging current, it is only necessary to change the series resistance between the ninth resistor R9 and the eighth resistor R8. The size of the series resistance between the ninth resistor R9 and the eighth resistor R8 can be achieved by controlling the on and off of the first switch tube Q1.

[0092] If the preset voltage is 5V, the preset high current is 2A, and the preset low current is 1A, the method to realize high current charging of 5V / 2A adapter and low current charging of 5V / 1A adapter is as follows:

[0093] When setting the high current charging condition, the control circuit 50 determines the load capacity of the power adapter by detecting the input voltage of the power input terminal 10. In the case of high current charging, if the input voltage of the power input terminal 10 is too low, it means that the power of the whole machine has exceeded the load capacity of the adapter. The control circuit 50 turns off the first switch tube Q1, increases the series resistance between the ninth resistor R9 and the eighth resistor R8, and switches to low current charging. In the case of low current charging, if the input voltage of the power input terminal 10 is low, it means that the power of the whole machine is small at this time, and the current can also be increased to achieve fast charging. At this time, the control circuit 50 turns off the first switch tube Q1, increases the series resistance between the ninth resistor R9 and the eighth resistor R8, and switches to high current charging. Through the above scheme, fast charging can be achieved while ensuring charging safety. It is worth noting that a variety of different shunt circuits can also be added here, and a variety of current switching methods can be added to achieve more precise adjustment of the charging current, thereby achieving faster charging.

[0094] To achieve the above object, the present invention further provides a portable rechargeable aromatherapy machine, which includes the working circuit of the portable rechargeable aromatherapy machine as described above.

[0095] It is worth noting that, because the portable rechargeable aromatherapy machine of the present invention includes all embodiments of the working circuit of the portable rechargeable aromatherapy machine described above, the portable rechargeable aromatherapy machine of the present invention has all the beneficial effects of the working circuit of the portable rechargeable aromatherapy machine described above, which will not be repeated here.

[0096] In one embodiment, if Figure 2 As shown, the portable rechargeable aromatherapy machine further includes a power storage device 60, and the power storage device 60 is electrically connected to the output end of the charging current switching circuit 40 of the portable rechargeable aromatherapy machine.

[0097] The power storage device 60 is a battery. By installing the battery in the portable rechargeable aromatherapy machine, the portable rechargeable aromatherapy machine can be easy to carry, convenient to use in places where charging is not possible, and convenient to place.

[0098] The above are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A working circuit of a portable rechargeable aromatherapy machine, characterized in that: The working circuit of the portable rechargeable aromatherapy machine includes: Power input terminal; A power supply circuit, the input end of which is connected to the power input end and is used to step down the power input of the power supply to a preset voltage; a first voltage detection circuit, wherein a detection end of the first voltage detection circuit is connected to the power input end and is used to detect an input voltage value of the power input end; A control circuit, wherein the control circuit has a current detection terminal, the current detection terminal of the control circuit is connected to the output terminal of the first voltage detection circuit, and is used to output a corresponding current control signal according to the input voltage value; A charging current switching circuit, wherein the charging current switching circuit has an input end, an output end and a controlled end, the input end of the charging current switching circuit is connected to the output end of the power supply circuit, the output end of the charging current switching circuit is connected to the input and output ends of the power storage device, and the controlled end of the charging current switching circuit is connected to the current control signal output end of the control circuit, and is used to output an output current value corresponding to the control signal to the power storage device according to the control signal; The charging current switching circuit comprises a shunt branch and a switch branch, wherein the switch branch has an input end, an output end and a controlled end, wherein the input end of the switch branch is connected to the input end of the shunt branch, and the connection node thereof is the input end of the charging current switching circuit, the output end of the switch branch is connected to the output end of the shunt branch, and the connection node thereof is the output end of the charging current switching circuit, and the controlled end of the switch branch is the controlled end of the charging current switching circuit; The shunt branch is used to shunt the current output by the power supply circuit; The switch branch is used to be turned on or off according to the control signal, and to short-circuit the shunt branch when turned on; The working circuit of the portable rechargeable aromatherapy machine further includes a boost circuit, and the control circuit further includes a discharge control signal output terminal, and the discharge control signal output terminal of the control circuit is connected to the controlled terminal of the boost circuit; The control circuit is also used to output a discharge control signal; The boost circuit is used for boosting the input voltage and then discharging it according to the discharge control signal; The working circuit of the portable rechargeable aromatherapy machine also includes an atomization circuit, and the control circuit also has an atomization control signal output terminal and an atomization state detection terminal. The feedback terminal of the atomization circuit is connected to the atomization state detection terminal of the control circuit, the atomization control signal output terminal of the atomization circuit is connected to the controlled terminal of the atomization circuit, and the power supply terminal of the atomization circuit is connected to the output terminal of the boost circuit. The control circuit is further used to obtain the atomization state feedback signal and output an atomization control signal according to the atomization state feedback signal; The atomization circuit is used to drive the atomization head to atomize liquid at a preset oscillation frequency according to the atomization control signal.

2. The working circuit of the portable rechargeable aromatherapy machine as claimed in claim 1, characterized in that: The working circuit of the portable rechargeable aromatherapy machine further includes a second voltage detection circuit, and the control circuit further includes a level detection input terminal, and the level detection input terminal of the second voltage detection circuit is connected to the output terminal of the second voltage detection circuit; The second voltage detection circuit is used to detect the voltage value of the power storage device; The control circuit is also used to control the power supply circuit to stop working when the voltage value reaches a preset threshold voltage.

3. The working circuit of the portable rechargeable aromatherapy machine as claimed in claim 1, characterized in that: The working circuit of the portable rechargeable aromatherapy machine also includes an LED working circuit, and the control circuit also has an LED driving signal output end, the driving signal output end of the control circuit is connected to the input end of the LED working circuit, and the power supply end of the LED working circuit is connected to the output end of the boost circuit; The control circuit is also used to output a corresponding LED driving signal according to the working state of the working circuit of the portable rechargeable aromatherapy machine; The LED working circuit is used to light up the corresponding LED lamp according to the LED driving signal.

4. The working circuit of the portable rechargeable aromatherapy machine as claimed in claim 1, characterized in that: The working circuit of the portable rechargeable aromatherapy machine also includes a fan driving circuit, the control circuit also has a fan driving signal output terminal, the input terminal of the fan driving circuit is connected to the fan driving signal output terminal of the control circuit, and the power supply terminal of the fan driving circuit is connected to the output terminal of the boost circuit; The control circuit is also used to output a fan driving signal; The fan driving circuit is used to drive the fan according to the fan driving signal.

5. The working circuit of the portable rechargeable aromatherapy machine as claimed in claim 1, characterized in that: The working circuit of the portable rechargeable aromatherapy machine further includes a switch circuit, and the control circuit further includes a switch signal input terminal, and the switch signal input terminal of the control circuit is connected to the output terminal of the switch circuit; The switch circuit is used to input a variety of control signals; The control circuit is also used to control the start-up of the portable rechargeable aromatherapy machine according to the control signal.

6. A portable rechargeable aromatherapy machine, characterized in that: The portable rechargeable aromatherapy machine comprises a working circuit of the portable rechargeable aromatherapy machine as described in any one of claims 1 to 5.

7. The portable rechargeable aromatherapy machine according to claim 6, characterized in that: The portable rechargeable aromatherapy machine further comprises a power storage device, and the power storage device is electrically connected to an output end of a charging current switching circuit of the portable rechargeable aromatherapy machine.

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