Microcurrent circuit and microcurrent shower head

Abstract

A microcurrent circuit and a microcurrent shower head. The microcurrent circuit comprises a logic controller (100), a power supply (200), a microcurrent power supply module (10), a boost module (20) and a current sampling module (30). The logic controller (100) determines, on the basis of a sampling signal of the current sampling module (30) when the current sampling module (30) is turned on, that a water flow passes through the current sampling module (30); acquires a current value of the current sampling module (30) from a second output end of the current sampling module (30) on the basis of the sampling signal; obtains the conductivity of the water flow on the basis of the current value and a preset current value; and controls the output voltage of the microcurrent power supply module (10) on the basis of the conductivity of the water flow.

Description

Microcurrent circuit and microcurrent showerhead

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 28, 2023, with application number 202311844294.1, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the technical field of electronic circuits, for example, to a microcurrent circuit and a microcurrent showerhead. Background Art

[0003] Various related beauty devices require an external power source to operate. Consequently, most are designed for use in dry environments, away from water. Even battery-powered and water-tight, the risk of water intrusion persists. Consequently, these devices are only permitted to operate in environments with minimal water. Using them in the shower poses a significant safety hazard.

[0004] To solve this problem, microcurrent showerheads have appeared on the market. They use the human body as a conductor, allowing tiny currents to pass through the body to stimulate and massage the skin, achieving a beauty effect. However, the conductivity of water flow is variable. Microcurrent showerheads of related technologies simply connect the human body between the positive and negative poles of the power supply, and cannot adjust the size of the microcurrent according to the conductivity of the water flow, thus failing to achieve a beauty effect.

[0005] Summary of the Invention

[0006] The present application provides a microcurrent circuit and a microcurrent shower head, which measures the conductivity of water flow, adjusts the output voltage according to the conductivity, and then adjusts the size of the microcurrent, thereby achieving more precise regulation of the microcurrent.

[0007] In a first aspect, an embodiment of the present application provides a micro-current circuit, including a logic controller, a power supply, a micro-current power supply module, a boost module, and a current sampling module;

[0008] The first input end of the boost module is connected to the power supply, and the second input end of the boost module is connected to the first output end of the logic controller; the first output end of the boost module is connected to the first input end of the logic controller, the second output end of the boost module is connected to the input end of the current sampling module, and the first output end of the current sampling module is connected to the second input end of the logic controller; the second output end of the current sampling module is connected to the third input end of the logic controller; the first input end of the micro-current power supply module is connected to the power supply, and the second input end of the micro-current power supply module is connected to the second output end of the logic controller;

[0009] The logic controller is configured to control the boost module to boost the voltage output from the power supply to the current sampling module to a preset voltage; and collect the boosted voltage value through the first output terminal of the boost module to determine whether the boosted voltage value reaches the preset voltage;

[0010] The logic controller is configured to determine, when the current sampling module is turned on, that water is flowing through the current sampling module based on a sampling signal outputted from a first output terminal of the current sampling module; and to collect a current value of the current sampling module from a second output terminal of the current sampling module based on the sampling signal; and to obtain the conductivity of the water flow based on the current value of the current sampling module and a preset current value;

[0011] The logic controller is configured to control the output voltage of the microcurrent power supply module according to the conductivity of the water flow, so that the output voltage of the microcurrent power supply module is within a preset voltage range.

[0012] In a second aspect, an embodiment of the present application further provides a microcurrent shower head, comprising a microcurrent circuit as described in any one of the first aspects of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG1 is a schematic structural diagram of a micro-current circuit provided in an embodiment of the present application;

[0014] FIG2 is a circuit structure diagram of a micro-current power supply module provided in an embodiment of the present application;

[0015] FIG3 is a circuit structure diagram of a current sampling module provided in an embodiment of the present application;

[0016] FIG4 is a circuit structure diagram of a boost module provided in an embodiment of the present application;

[0017] FIG5 is a schematic structural diagram of a micro-current shower provided in an embodiment of the present application;

[0018] FIG6 is a block diagram of the working principle of a microcurrent shower provided in an embodiment of the present application. DETAILED DESCRIPTION

[0019] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described based on the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is formed "on" or "under" another element, it can not only be directly formed "on" or "under" another element, but also indirectly formed "on" or "under" another element through an intermediate element. The terms "first", "second", etc. are only used for descriptive purposes and do not indicate any order, quantity or importance, but are only used to distinguish different components. For those of ordinary skill in the art, the meaning of the above terms in this application can be understood according to the circumstances.

[0020] The term "including" and its variations used in this application are open inclusions, that is, "including but not limited to." The term "based on" means "based at least in part on." The term "one embodiment" means "at least one embodiment."

[0021] It should be noted that the concepts such as "first" and "second" mentioned in this application are only used to distinguish the corresponding contents, and are not used to limit the order or mutual dependence.

[0022] It should be noted that the modifications of "one" and "multiple" mentioned in this application are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "at least one".

[0023] FIG1 is a schematic structural diagram of a micro-current circuit provided in an embodiment of the present application. Referring to FIG1 , the circuit includes a logic controller 100, a power supply 200, a micro-current power supply module 10, a boost module 20, and a current sampling module 30; a first input terminal BAT_OUT of the boost module 20 is connected to the power supply 200, and a second input terminal PWM BOOST of the boost module 20 is connected to a first output terminal of the logic controller 100; a first output terminal BOOST AD of the boost module 20 is connected to a first input terminal of the logic controller 100, a second output terminal VCC HV of the boost module 20 is connected to an input terminal of the current sampling module 30, a first output terminal Touch Test of the current sampling module 30 is connected to a second input terminal of the logic controller 100; a second output terminal EMS of the current sampling module 30 is connected to a first input terminal of the logic controller 100, and a second output terminal EMS of the current sampling module 30 is connected to a first input terminal of the logic controller 100. AD is connected to the third input terminal of the logic controller 100; the first input terminal VBAT of the microcurrent power supply module 10 is connected to the power supply 200, and the second input terminal IO_EMS of the microcurrent power supply module 10 is connected to the second output terminal of the logic controller 100; the logic controller is configured to control the boost module to boost the voltage output from the power supply to the current sampling module to a preset voltage; and the boosted voltage value is collected by the first output terminal of the boost module to determine whether the boosted voltage value reaches the preset voltage; the logic controller is configured to determine that water flows through the current sampling module according to the sampling signal output by the first output terminal of the current sampling module when the current sampling module is turned on; the logic controller also collects the current value of the current sampling module from the second output terminal of the current sampling module according to the sampling signal; and obtains the conductivity of the water flow according to the current value of the current sampling module and the preset current value; the logic controller is configured to control the output voltage of the microcurrent power supply module according to the conductivity of the water flow, so that the output voltage of the microcurrent power supply module is within a preset voltage range.

[0024] The preset voltage range can be understood as a voltage range that is pre-set by the user according to actual needs and can generate the required microcurrent.

[0025] For example, Figure 2 is a circuit structure diagram of a microcurrent power supply module provided in an embodiment of the present application. Referring to Figures 1 and 2, in an optional embodiment of the present application, the microcurrent power supply module 10 is placed in the shower head, and the two output terminals EMS_OUT1 and EMS_OUT2 of the microcurrent power supply module 10 are respectively placed at the water outlet of the shower head and the handle. When the user holds the handle and the shower head discharges water, the microcurrent is conducted to the human body through the water flow. However, the conductivity of the water flow will change with temperature and environmental factors. In order to make the microcurrent reaching the human body within a stable range, it is necessary to adjust the output voltage of the microcurrent power supply module 10 according to the conductivity of the water flow. Therefore, a current sampling module 30 is provided to collect the current value I after the water flows through the conductive state and feed this current value back to the logic controller 100. The logic controller 100 compares the current value I with the preset current value standard value IA to obtain the conductivity of the water flow. The logic controller 100 then adjusts the output voltage of the microcurrent power supply module 10 based on the conductivity of the water flow, so that the microcurrent power supply module 10 outputs a voltage value UA corresponding to the current standard value IA, thereby ensuring that the microcurrent flowing through the human body is within a certain range and the user experience is in a comfortable state. The current standard value IA is a set of data pre-stored in the logic controller. In other embodiments of the present application, the conductivity of the water flow can also be measured to obtain the conductivity of the water flow based on the conductivity, or the conductivity of the water flow can be obtained by sampling the voltage value of the water flow, thereby adjusting the microcurrent power supply module 10.

[0026] At the same time, in an optional embodiment of the present application, since the power supply 200 is a battery power supply, its voltage is relatively small. After the water flow conducts electricity, collecting the current value will affect the accuracy due to the small current value. Therefore, the boost module 20 is used to boost it to a preset voltage value; and the boosted voltage is output to the current sampling module 30, and the voltage value of the first output terminal BOOST AD of the boost module 20 after the boost is collected to determine whether the boost module 20 has increased the voltage value to the preset voltage value; if the boost module 20 has not increased the voltage value to the preset voltage value, it is adjusted in real time until the preset voltage value is reached. The preset voltage value can be understood as a voltage value pre-set for the convenience of detection; the current sampling module 30 outputs a sampling signal when it is turned on; Figure 3 is a circuit structure diagram of a current sampling module provided in an embodiment of the present application. Referring to Figures 1 and 3, in an optional embodiment, the current sampling module 30 includes a first external terminal EMS OUTP and a second external terminal EMS OUTN; the current sampling module 30 is connected to the first external terminal EMS OUTP and the second external terminal EMS OUTN is turned on when it is conductively connected through an external conductive medium. For example, when the shower is discharging water, the first external terminal EMS OUTP and the second external terminal EMS OUTN are conductively connected through the water flow, and the current sampling module 30 is turned on at this time; at this time, the current sampling module 30 outputs a sampling signal through the first output terminal Touch Test. After receiving the sampling signal, the logic controller collects the current value of the current sampling module 30 through the second output terminal EMS AD of the current sampling module 30. In other embodiments of the present application, the voltage value of the second output terminal EMS AD of the current sampling module 30 can also be collected, and the conductivity of the water flow can be obtained by comparing it with a preset voltage value.

[0027] A microcurrent circuit provided in an embodiment of the present application includes a logic controller, a power supply, a microcurrent power supply module, a boost module and a current sampling module; the first input end of the boost module is connected to the power supply, and the second input end of the boost module is connected to the first output end of the logic controller; the first output end of the boost module is connected to the first input end of the logic controller, the second output end of the boost module is connected to the input end of the current sampling module, and the first output end of the current sampling module is connected to the second input end of the logic controller; the second output end of the current sampling module is connected to the third input end of the logic controller; the first input end of the microcurrent power supply module is connected to the power supply, and the second input end of the microcurrent power supply module is connected to the second output end of the logic controller; the logic controller is configured to control the boost module to boost the voltage output from the power supply to the current sampling module to a preset voltage; and the boosted voltage value is collected by the first output end of the boost module to determine whether the boosted voltage value reaches to a preset voltage; the logic controller is configured to determine that water flows through the current sampling module according to a sampling signal outputted from the first output terminal of the current sampling module when the current sampling module is turned on; and collect the current value of the current sampling module from the second output terminal of the current sampling module according to the sampling signal; to obtain the conductivity of the water flow according to the current value of the current sampling module and the preset current value; the logic controller is configured to control the output voltage of the microcurrent power supply module according to the conductivity of the water flow, so that the output voltage of the microcurrent power supply module is within a preset voltage range; the technical solution of the present application, by measuring the conductivity of the water flow, adjusts the output voltage of the microcurrent power supply module according to the conductivity, and then adjusts the size of the microcurrent, solves the problem that when the conductivity of the water flow changes, the microcurrent will also change, resulting in a discrepancy with the preset microcurrent size, and can achieve more precise adjustment of the microcurrent. When applied to a shower head, the appropriate microcurrent size brings the user a better numbing feeling, thereby improving the user experience.

[0028] Optionally, referring to FIG3 , the current sampling module 30 includes a switch unit 31 and a sampling signal output unit 32; the first input terminal of the switch unit 31 is connected to the second output terminal VCC HV of the boost module 20 as the input terminal of the current sampling module 30, and the second input terminal IO EMS of the switch unit 31 is connected to the third output terminal of the logic controller 100; the input terminal of the sampling signal output unit 32 is connected to the output terminal of the switch unit 31, and the output terminal of the sampling signal output unit 32 is connected to the second input terminal of the logic controller 100 as the first output terminal Touch Test of the current sampling module 30; the switch unit 31 is turned on when the third output terminal of the logic controller outputs a control signal, and provides a voltage to the sampling signal output unit 32; the sampling signal output unit 32 outputs a sampling signal when receiving the voltage output by the switch unit 31; the logic controller collects the current value from the input terminal EMS AD of the sampling signal output unit 32 according to the sampling signal. In an optional embodiment of the present application, when the logic controller collects the current value from the input terminal EMS AD of the sampling signal output unit 32 according to the sampling signal, the current value can also be transmitted through an organic light-emitting diode (OLED). Diode, OLED) screen is displayed for easy observation.

[0029] Exemplarily, the switch unit 31 includes a first switch subunit 311, a second switch subunit 312, a third switch subunit 313 and a fourth switch subunit 314; the first switch subunit 311 and the second switch subunit 312 are connected in parallel; the third switch subunit 313 is connected in series with the first switch subunit 311, and the fourth switch subunit 314 is connected in series with the second switch subunit 312; the first input ends of the first switch subunit 311 and the second switch subunit 312 are connected as the input ends of the switch unit 31 to the second output end of the boost module 20; the output end of the first switch subunit 311 is connected to the input end of the third switch subunit 313 The first external terminal is located between the output terminal of the first switch subunit and the input terminal of the third switch subunit; the output terminal of the second switch subunit 312 is connected to the input terminal of the fourth switch subunit 314; the second external terminal is located between the output terminal of the second switch subunit and the input terminal of the fourth switch subunit; the output terminals of the third switch subunit 313 and the fourth switch subunit 314 are connected as the output terminals of the switch unit 31 to the input terminal of the sampling signal output unit 32; the third output terminal of the logic controller 100 includes a first sub-output terminal and a second sub-output terminal; the second input terminal IO of the first switch subunit 311 and the fourth switch subunit 314 EMSP is connected to the first sub-output terminal; the second input terminal IO and the second input terminal EMSN of the second switch sub-unit 312 and the third switch sub-unit 313 are connected to the second sub-output terminal; the first switch sub-unit 311 and the fourth switch sub-unit 314 are turned on when the first sub-output terminal outputs a signal; the second switch sub-unit 312 and the third switch sub-unit 313 are turned on when the second sub-output terminal outputs a signal; when the first switch sub-unit 311 and the fourth switch sub-unit 314 are turned on, the second switch sub-unit 312 and the third switch sub-unit 313 are turned off, and the first external terminal and the second external terminal are conductively connected via an external conductive medium, the switch unit is turned on.

[0030] The first switch subunit 311 includes a first transistor Q5 and a second transistor Q7; the second switch subunit 312 includes a third transistor Q6 and a fourth transistor Q8; the third switch subunit 313 includes a fifth transistor Q10 and a sixth transistor Q12; the fourth switch subunit 314 includes a seventh transistor Q11 and an eighth transistor Q9; the first electrode of the first transistor Q5 is connected to the second output terminal VCC of the boost module. HV is connected; the second electrode of the first transistor Q5 is connected to the first electrode of the fifth transistor Q10, the base of the first transistor Q5 is connected to the second electrode of the second transistor Q7, the first electrode of the second transistor Q7 is grounded, and the base of the second transistor Q7 is connected to the first sub-output end; the first electrode of the third transistor Q6 is connected to the second output end of the boost module; the second electrode of the third transistor Q6 is connected to the first electrode of the seventh transistor Q11, the base of the third transistor Q6 is connected to the second electrode of the fourth transistor Q8, the first electrode of the fourth transistor Q8 is grounded GND, and the fourth transistor Q8 The base of the fifth triode Q10 is connected to the second sub-output terminal; the second electrode of the fifth triode Q10 is connected to the input terminal of the sampling signal output unit, the base of the fifth triode Q10 is connected to the second electrode of the sixth triode Q12, the first electrode of the sixth triode Q12 is grounded, and the base of the sixth triode Q12 is connected to the second sub-output terminal; the second electrode of the seventh triode Q11 is connected to the input terminal of the sampling signal output unit, the base of the seventh triode Q11 is connected to the second electrode of the eighth triode Q9, the first electrode of the eighth triode Q9 is grounded, and the base of the eighth triode Q9 is connected to the first sub-output terminal.

[0031] For example, referring to FIG3 , the second input terminals IO EMS P of the first switch subunit 311 and the fourth switch subunit 314 are connected to the first sub-output terminal of the logic controller. The base of the second transistor Q7 in the first switch subunit 311 is turned on after receiving a high-level signal, wherein the second transistor Q7 is further connected to turn-on resistors R22 and R24 to accelerate the turn-on speed. After the second transistor Q7 is turned on, the base of the first transistor Q5 is also turned on after receiving a high-level signal. The first transistor Q5 may also be connected to turn-on resistors R19 and R20 to accelerate the turn-on speed. Similarly, the seventh transistor Q11 and the eighth transistor Q9 in the fourth switch subunit 314 are also turned on after receiving a high-level signal from the second input terminal IO EMS P. Turn-on resistors R29 and R31 also accelerate the turn-on speed. The second input terminals IO EMS P of the second switch subunit 312 and the third switch subunit 313 are also turned on. N is connected to the second sub-output terminal of the logic controller; the base of the fourth transistor Q8 in the second switch sub-unit 312 receives a low level, turning off the fourth transistor Q8 and the third transistor Q6. Correspondingly, the base of the fifth transistor Q10 and the sixth transistor Q12 in the third switch sub-unit 313 are also turned off. When a conductive medium is electrically connected between the first external terminal EMS OUTP and the second external terminal EMS OUTN of the current sampling module 30, the current output from the second output terminal VCC HV of the boost module passes through the first transistor Q5, the resistor R25, the first external terminal EMS OUTP, the second external terminal EMS OUTN, and the seventh transistor Q11 to the input terminal EMS AD of the sampling signal output unit 32. At this time, the sampling signal output unit 32 outputs a sampling signal from the output terminal Touch Test. The logic controller collects the current value from the input terminal EMS AD of the sampling signal output unit 32 based on the sampling signal.

[0032] Optionally, the sampling signal output unit 32 includes a first sampling resistor R34, a second sampling resistor R37, a ninth transistor Q13, a first voltage-dividing resistor R32, and a first fixed potential VCC 3V. The first sampling resistor R34 and the second sampling resistor R37 are connected in series. One end of the first sampling resistor R34 serves as an input end of the sampling signal output unit 32 and is connected to the output end of the switch unit 31. The other ends of the second sampling resistor R37 and the first sampling resistor R34 are connected to the base of the ninth transistor Q13. A first electrode of the ninth transistor Q13 is grounded. A second electrode of the ninth transistor Q13 is connected to one end of the first voltage-dividing resistor R32. The other end of the first voltage-dividing resistor R32 is connected to the first fixed potential. One end of the first voltage-dividing resistor R32 serves as an output end of the sampling signal output unit 32 and is connected to the second input end of the logic controller. The ninth transistor Q13 is turned on when receiving the voltage output by the switch unit 31. When the ninth transistor Q13 is turned on, the output end of the sampling signal output unit 32 outputs the sampling signal.

[0033] Illustratively, when the switch unit 31 is turned on, it outputs current to the sampling signal output unit 32. At this time, the base of the ninth transistor Q13 receives a high level and is turned on. Accordingly, one end of the first voltage-dividing resistor R32 is grounded through the ninth transistor Q13, and the other end is connected to the first fixed potential VCC 3V. After the ninth transistor Q13 is turned on, the potential of the first voltage-dividing resistor R32 is clamped to the first fixed potential VCC 3V. At this time, the potential of the output terminal Touch Test of the sampling signal output unit 32 becomes VCC 3V, and the sampling signal is output.

[0034] Optionally, referring to Figure 2, the microcurrent power supply module 10 includes a rectifier unit 11 and a transformer T1; the first input end of the rectifier unit 11 is connected to the power supply as the first input end of the microcurrent power supply module 10; the second input end of the rectifier unit 11 is connected to the second output end of the logic controller as the second input end of the microcurrent power supply module 10; the output end of the rectifier unit 11 is connected to the primary side of the transformer T1, and the secondary side of the transformer T1 serves as the output end of the microcurrent power supply module 10; the rectifier unit 11 is configured to adjust the DC voltage signal provided by the power supply to an AC voltage signal, and amplify the AC voltage signal according to the control signal output from the second output end of the logic controller; the transformer T1 is configured to boost the AC voltage signal.

[0035] Optionally, the rectifier unit 11 includes a second voltage-dividing resistor R38, a third voltage-dividing resistor R40, a fourth voltage-dividing resistor R42, a tenth transistor Q14, an eleventh transistor Q15 and a first capacitor C12; one end of the second voltage-dividing resistor R38 is respectively connected to the power supply and the first stage of the tenth transistor Q14, the other end of the second voltage-dividing resistor R38 is respectively connected to one end of the third voltage-dividing resistor R40 and one end of the first capacitor C12, the other end of the first capacitor C12 is connected to the primary side of the transformer, the other end of the third voltage-dividing resistor R40 is respectively connected to the base of the tenth transistor Q14 and the second stage of the tenth transistor Q15, the first stage of the tenth transistor Q15 and the second stage of the tenth transistor Q14 are both connected to the primary side of the transformer T1; the base of the eleventh transistor Q15 is connected to one end of the fourth voltage-dividing resistor R42, and the other end of the fourth voltage-dividing resistor R42 is connected to the second output end of the logic controller.

[0036] For example, since the transformer T1 can only boost the AC voltage, it is necessary to use the rectifier unit 11 to convert the DC signal output by the power supply into an AC signal; referring to Figure 2, the second output terminal of the logic controller outputs a control signal to the eleventh transistor Q15 to control the switch of the eleventh transistor Q15. When the eleventh transistor Q15 is turned off, the voltage output by the power supply is transmitted from the first input terminal VBAT of the micro-current power supply module 10 through the second voltage divider resistor R38 and the first capacitor C12 to the third terminal 3 of the primary side of the transformer T1. Since the second terminal 2 of the primary side of the transformer T1 is a common terminal, the first terminal 1 and the second terminal 2 are a winding, and the second terminal 2 and the third terminal 3 are a winding. At this time, the winding composed of the second terminal 2 and the third terminal 3 is charged; and since the third terminal 3 of the primary side of the transformer T1 and the fifth terminal 5 of the secondary side of the transformer T1 are the same-named terminals, they are connected to the fifth terminal 5. The output terminal EMS_OUT1 connected to the fourth terminal 4 is the positive output terminal, and the output terminal EMS_OUT2 connected to the fourth terminal 4 is the negative output terminal; when the eleventh transistor Q15 is turned on, the voltage output by the power supply is transmitted by the second voltage-dividing resistor R38, the third voltage-dividing resistor R40, and the eleventh transistor Q15 to the second terminal 2 on the primary side of the transformer T1. At this time, the output terminal EMS_OUT1 connected to the fifth terminal 5 is the negative output terminal, and the output terminal EMS_OUT2 connected to the fourth terminal 4 is the positive output terminal; when the eleventh transistor Q15 is turned on, the power supply and the winding composed of the second terminal 2 and the third terminal 3 supply power at the same time. At this time, the voltage output on the secondary side of the transformer T1 increases. Therefore, the magnitude of the boost is controlled by controlling the switching frequency of the eleventh transistor Q15. At the same time, the transistor Q14 can effectively reduce the voltage glitches in the output voltage of the micro-current power supply module 10 and improve the power supply quality.

[0037] Optionally, Figure 4 is a circuit structure diagram of a boost module provided in an embodiment of the present application. Referring to Figure 4, the boost module 20 includes a boost unit 21, a voltage sampling unit 22 and a discharge unit 23; the first input end of the boost unit 21 is connected to the power supply as the first input end BAT_OUT of the boost module 20; the second input end of the boost unit 21 is connected to the first output end of the logic controller as the second input end PWM BOOST of the boost module 20; the output end of the boost unit 21 is connected to the input end of the current sampling module as the second output end of the boost module 20; the input end of the voltage sampling unit 22 is connected to the output end of the boost unit; the output end of the voltage sampling unit is connected to the first input end of the logic controller as the first output end of the boost module; the first input end of the discharge unit is connected to the output end of the boost unit; the second input end Release of the discharge unit is connected to the fourth output end of the logic controller; and the output end of the discharge unit is grounded.

[0038] Exemplarily, the boost unit 21 includes a first inductor L1, a first diode D2, a twelfth transistor Q3, a fifth voltage-dividing resistor R13, a sixth voltage-dividing resistor R15 and a second capacitor C7; one end of the first inductor L1 is connected to the power supply, and the other end is respectively connected to one end of the first diode D2 and the second electrode of the twelfth transistor Q3; the other end of the first diode D2 is respectively connected to the input end of the current sampling module 30 and one end of the second capacitor C7; the other end of the second capacitor C7 is grounded; the base of the twelfth transistor Q3 is respectively connected to one end of the fifth voltage-dividing resistor R13 and one end of the sixth voltage-dividing resistor R15; the other end of the fifth voltage-dividing resistor R13 is connected to the first output end of the logic controller; the other end of the sixth voltage-dividing resistor R15 is respectively grounded and the first electrode of the twelfth transistor Q3.

[0039] For example, since a too low power supply voltage may affect the data acquisition accuracy, it is necessary to use the boost unit 21 to boost it. For example, the logic controller can control the boost by outputting a control signal to the second input terminal PWM BOOST of the boost module 20, that is, the base of the twelfth transistor Q3, to control the switching frequency of the twelfth transistor Q3. For example, when the twelfth transistor Q3 is turned on, the power supply charges the first inductor L1 through the first input terminal BAT_OUT of the boost module 20 and is grounded through the twelfth transistor Q3. When the twelfth transistor Q3 is turned off, the power supply is connected to the first inductor L1 through the BAT_OUT terminal, and the current is output to the current sampling module 30 through the first diode D2 and the second output terminal VCC HV of the boost module. At the same time, the first inductor L1 also supplies power to the current sampling module 30 through the second output terminal VCC HV of the boost module, thereby boosting the voltage output to the current sampling module 30.

[0040] Optionally, the voltage sampling unit 22 includes a seventh voltage-dividing resistor R12, an eighth voltage-dividing resistor R16, and a third capacitor C8; one end of the seventh voltage-dividing resistor R12 is connected to the output end of the boost unit 21; the other end of the seventh voltage-dividing resistor R12 is respectively connected to one end of the eighth voltage-dividing resistor R16 and the second input end of the logic controller; the other end of the eighth voltage-dividing resistor R16 is respectively connected to ground and one end of the third capacitor C8; and the other end of the third capacitor C8 is connected to the second input end of the logic controller. For example, to determine whether the boosted voltage of the boost module 20 is consistent with the preset voltage, the logic controller collects the voltage values ​​of the seventh voltage-dividing resistor R12 and the eighth voltage-dividing resistor R16 in the voltage sampling unit 22.

[0041] Optionally, the discharge unit 23 includes a ninth voltage-dividing resistor R11, a tenth voltage-dividing resistor R14, an eleventh voltage-dividing resistor R17 and a thirteenth transistor Q4; one end of the ninth voltage-dividing resistor R11 is connected to the output end of the boost unit; the other end of the ninth voltage-dividing resistor R11 is connected to the second electrode of the thirteenth transistor Q4, and the first electrode of the thirteenth transistor Q4 is grounded; the base of the thirteenth transistor Q4 is respectively connected to one end of the tenth voltage-dividing resistor R14 and the eleventh voltage-dividing resistor R17; the other end of the tenth voltage-dividing resistor R14 is connected to the fourth output end Release of the logic controller; the other end of the eleventh voltage-dividing resistor R17 is respectively connected to the ground and the first electrode of the thirteenth transistor Q4.

[0042] For example, when the micro-current circuit needs to stop working and the power supply stops supplying power to the boost module 20, since the second capacitor C7 stores charge, it is necessary to discharge its charge when the power supply stops to prevent danger. Therefore, the fourth output terminal Release of the logic controller outputs a control signal when the power supply stops supplying power to the boost module 20 to control the thirteenth transistor Q4 to turn on. At this time, the charge of the second capacitor C7 passes through the ninth voltage-dividing resistor R11 and the thirteenth transistor Q4 to the ground GND.

[0043] Figure 5 is a structural schematic diagram of a microcurrent shower provided in an embodiment of the present application, and Figure 6 is a block diagram of the working principle of a microcurrent shower provided in an embodiment of the present application. Referring to Figures 5 and 6, the two output terminals EMS_OUT1 and EMS_OUT2 of the microcurrent power supply module 10 are respectively placed at the water outlet and the handle of the microcurrent shower. When the power supply 200, that is, the battery inputs voltage, the logic controller controls the microcurrent power supply module 10 to convert the input voltage into AC voltage and boost it through a transformer. When the user holds the handle and the shower discharges water, the microcurrent is conducted to the human body through the water flow. At the same time, the first external terminal EMS OUTP and the second external terminal EMS OUTN of the current sampling module 30 are located inside the shower and are conducted by the water flow when the shower discharges water. Since the microcurrent shower includes the microcurrent circuit provided in the embodiment of the present application, it has the corresponding effects of the microcurrent circuit provided in the embodiment of the present application, which will not be repeated here.

Claims

1. A micro-current circuit, comprising a logic controller (100), a power supply (200), a micro-current power supply module (10), a boost module (20) and a current sampling module (30); The first input end of the boost module (20) is connected to the power supply (200), and the second input end of the boost module (20) is connected to the first output end of the logic controller (100); the first output end of the boost module (20) is connected to the first input end of the logic controller (100), the second output end of the boost module (20) is connected to the input end of the current sampling module (30), and the first output end of the current sampling module (30) is connected to the second input end of the logic controller (100); the second output end of the current sampling module (30) is connected to the third input end of the logic controller (100); the first input end of the micro-current power supply module (10) is connected to the power supply (200), and the second input end of the micro-current power supply module (10) is connected to the second output end of the logic controller (100); The logic controller (100) is configured to control the boost module (20) to boost the voltage output from the power supply (200) to the current sampling module (30) to a preset voltage; The logic controller (100) is configured to obtain the conductivity of the water flow by comparing the current value of the current sampling module (30) with a preset current value; The logic controller (100) is configured to control the output voltage of the micro-current power supply module (10) according to the conductivity of the water flow, so that the output voltage of the micro-current power supply module (10) is within a preset voltage range.

2. The micro-current circuit according to claim 1, wherein, The current sampling module (30) includes a first external connection end and a second external connection end; in response to the first external connection end and the second external connection end being conductively connected through water flow, the current sampling module (30) is turned on.

3. The microcurrent circuit according to claim 2, wherein, The current sampling module (30) includes a switch unit (31) and a sampling signal output unit (32); The first input end of the switch unit (31) is used as the input end of the current sampling module (30) and is connected to the second output end of the boost module (20), and the second input end of the switch unit (31) is connected to the third output end of the logic controller (100); the input end of the sampling signal output unit (32) is connected to the output end of the switch unit (31), and the output end of the sampling signal output unit (32) is used as the first output end of the current sampling module (30) and is connected to the second input end of the logic controller (100).

4. The micro-current circuit according to claim 3, wherein, The switch unit (31) includes a first switch sub-unit (311), a second switch sub-unit (312), a third switch sub-unit (313), and a fourth switch sub-unit (314); the first switch sub-unit (311) and the second switch sub-unit (312) are connected in parallel; the third switch sub-unit (313) is connected in series with the first switch sub-unit (311), and the fourth switch sub-unit (314) is connected in series with the second switch sub-unit (312); The first input ends of the first switch sub-unit (311) and the second switch sub-unit (312) serve as the input end of the switch unit (31) and are connected to the second output end of the boost module (20); the output end of the first switch sub-unit (311) is connected to the input end of the third switch sub-unit (313); the first external connection end is located between the output end of the first switch sub-unit (311) and the input end of the third switch sub-unit (313); the output end of the second switch sub-unit (312) is connected to the input end of the fourth switch sub-unit (314); the second external connection end is located between the output end of the second switch sub-unit (312) and the input end of the fourth switch sub-unit (314); the output ends of the third switch sub-unit (313) and the fourth switch sub-unit (314) serve as the output end of the switch unit (31) and are connected to the input end of the sampling signal output unit (32); The third output end of the logic controller (100) includes a first sub-output end and a second sub-output end; the second input ends of the first switch sub-unit (311) and the fourth switch sub-unit (314) are connected to the first sub-output end; the second input ends of the second switch sub-unit (312) and the third switch sub-unit (313) are connected to the second sub-output end; In response to the signal output from the first sub-output end, the first switch sub-unit (311) and the fourth switch sub-unit (314) are turned on; in response to the signal output from the second sub-output end, the second switch sub-unit (312) and the third switch sub-unit (313) are turned on; In response to the first switch sub-unit (311) and the fourth switch sub-unit (314) being turned on, the second switch sub-unit (312) and the third switch sub-unit (313) are turned off, and the first external connection end and the second external connection end are conductively connected by water flow, and the switch unit (31) is turned on.

5. The micro-current circuit according to claim 4, wherein, The first switch sub-unit (311) includes a first triode and a second triode; the second switch sub-unit (312) includes a third triode and a fourth triode; the third switch sub-unit (313) includes a fifth triode and a sixth triode; the fourth switch sub-unit (314) includes a seventh triode and an eighth triode; The first pole of the first triode is connected to the second output terminal of the boost module (20); the second pole of the first triode is connected to the first pole of the fifth triode, the base of the first triode is connected to the second pole of the second triode, the first pole of the second triode is grounded, and the base of the second triode is connected to the first sub-output terminal; The first pole of the third triode is connected to the second output terminal of the boost module (20); the second pole of the third triode is connected to the first pole of the seventh triode, the base of the third triode is connected to the second pole of the fourth triode, the first pole of the fourth triode is grounded, and the base of the fourth triode is connected to the second sub-output terminal; The second pole of the fifth triode is connected to the input terminal of the sampling signal output unit (32), the base of the fifth triode is connected to the second pole of the sixth triode, the first pole of the sixth triode is grounded, and the base of the sixth triode is connected to the second sub-output terminal; The second pole of the seventh triode is connected to the input terminal of the sampling signal output unit (32), the base of the seventh triode is connected to the second pole of the eighth triode, the first pole of the eighth triode is grounded, and the base of the eighth triode is connected to the first sub-output terminal.

6. The microcurrent circuit according to claim 3, wherein, The sampling signal output unit (32) includes a first sampling resistor, a second sampling resistor, a ninth triode, a first voltage-dividing resistor, and a first fixed potential; The first sampling resistor and the second sampling resistor are connected in series; one end of the first sampling resistor serves as the input terminal of the sampling signal output unit (32) and is connected to the output terminal of the switch unit (31); the other ends of the second sampling resistor and the first sampling resistor are connected to the base of the ninth triode; The first pole of the ninth triode is grounded; the second pole of the ninth triode is connected to one end of the first voltage-dividing resistor; the other end of the first voltage-dividing resistor is connected to the first fixed potential; one end of the first voltage-dividing resistor serves as the output terminal of the sampling signal output unit (32) and is connected to the second input terminal of the logic controller (100); In response to the ninth triode receiving the voltage output by the switch unit (31), the ninth triode conducts. In response to the ninth triode at the output terminal of the sampling signal output unit (32) conducting, the sampling signal output unit (32) outputs a sampling signal.

7. The micro-current circuit according to claim 1, wherein, The micro-current power supply module (10) includes a rectifying unit (11) and a transformer; The first input terminal of the rectifying unit (11) serves as the first input terminal of the micro-current power supply module (10) and is connected to the power supply (200); the second input terminal of the rectifying unit (11) serves as the second input terminal of the micro-current power supply module (10) and is connected to the second output terminal of the logic controller (100); the output terminal of the rectifying unit (11) is connected to the primary side of the transformer; The rectifying unit (11) is configured to adjust the DC voltage signal provided by the power supply (200) to an AC voltage signal and amplify the AC voltage signal according to the control signal output from the second output terminal of the logic controller (100); the transformer is configured to step up the AC voltage signal.

8. The micro-current circuit according to claim 7, wherein, The rectifying unit (11) includes a second voltage-dividing resistor, a third voltage-dividing resistor, a fourth voltage-dividing resistor, a thirteenth triode, an eleventh triode, and a first capacitor; One end of the second voltage-dividing resistor is respectively connected to the power supply (200) and the first stage of the thirteenth triode, the other end of the second voltage-dividing resistor is respectively connected to one end of the third voltage-dividing resistor and one end of the first capacitor, the other end of the first capacitor is connected to the primary side of the transformer, the other end of the third voltage-dividing resistor is respectively connected to the base of the thirteenth triode and the second stage of the eleventh triode, the first stage of the eleventh triode and the second stage of the thirteenth triode are both connected to the primary side of the transformer; the base of the eleventh triode is connected to one end of the fourth voltage-dividing resistor, and the other end of the fourth voltage-dividing resistor is connected to the second output terminal of the logic controller (100).

9. The microcurrent circuit according to claim 1, wherein The boosting module (20) includes a boosting unit (21), a voltage sampling unit (22), and a discharging unit (23); The first input terminal of the boosting unit (21) is used as the first input terminal of the boosting module (20) and is connected to the power supply (200); the second input terminal of the boosting unit (21) is used as the second input terminal of the boosting module (20) and is connected to the first output terminal of the logic controller (100); the output terminal of the boosting unit (21) is used as the second output terminal of the boosting module (20) and is connected to the input terminal of the current sampling module (30); the input terminal of the voltage sampling unit (22) is connected to the output terminal of the boosting unit (21); the output terminal of the voltage sampling unit (22) is used as the first output terminal of the boosting module (20) and is connected to the first input terminal of the logic controller (100); the first input terminal of the discharging unit (23) is connected to the output terminal of the boosting unit (21); the second input terminal of the discharging unit (23) is connected to the fourth output terminal of the logic controller (100); the output terminal of the discharging unit (23) is grounded.

10. The micro-current circuit according to claim 9, wherein, The boosting unit (21) includes a first inductor, a first diode, a twelfth triode, a fifth voltage-dividing resistor, a sixth voltage-dividing resistor, and a second capacitor; One end of the first inductor is connected to the power supply (200), and the other end of the first inductor is respectively connected to one end of the first diode and the second pole of the twelfth triode; the other end of the first diode is respectively connected to the input end of the current sampling module (30) and one end of the second capacitor; the other end of the second capacitor is grounded; the base of the twelfth triode is respectively connected to one end of the fifth voltage-dividing resistor and the sixth voltage-dividing resistor; the other end of the fifth voltage-dividing resistor is connected to the first output end of the logic controller (100); the other end of the sixth voltage-dividing resistor is respectively grounded and connected to the first pole of the twelfth triode.

11. The microcurrent circuit according to claim 9, wherein, The voltage sampling unit (22) includes a seventh voltage-dividing resistor, an eighth voltage-dividing resistor, and a third capacitor; One end of the seventh voltage-dividing resistor is connected to the output end of the boost unit (21); the other end of the seventh voltage-dividing resistor is respectively connected to one end of the eighth voltage-dividing resistor and the first input end of the logic controller (100); the other end of the eighth voltage-dividing resistor is respectively grounded and connected to one end of the third capacitor; The other end of the third capacitor is connected to the first input end of the logic controller (100).

12. The microcurrent circuit according to claim 9, wherein, The discharge unit (23) includes a ninth voltage-dividing resistor, a tenth voltage-dividing resistor, an eleventh voltage-dividing resistor, and a thirteenth triode; One end of the ninth voltage-dividing resistor is connected to the output end of the boost unit (21); the other end of the ninth voltage-dividing resistor is connected to the second pole of the thirteenth triode, and the first pole of the thirteenth triode is grounded; the base of the thirteenth triode is respectively connected to one end of the tenth voltage-dividing resistor and the eleventh voltage-dividing resistor; the other end of the tenth voltage-dividing resistor is connected to the fourth output end of the logic controller (100); the other end of the eleventh voltage-dividing resistor is respectively grounded and connected to the first pole of the thirteenth triode.

13. A micro-current shower head, comprising the micro-current circuit according to any one of claims 1-12.

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