CN216823170U - Auto-induction bubbling circuit and hand washer - Google Patents

Abstract

The utility model discloses an auto-induction bubbling circuit and a hand washer, wherein the auto-induction bubbling circuit comprises a control circuit, and a key circuit, a power supply circuit, an infrared detection circuit, a bubbling circuit and a display circuit which are respectively and electrically connected with the control circuit; the key circuit is used for triggering a switch control signal or a gear control signal; the control circuit starts the foaming circuit according to the switch control signal, controls the foaming circuit to work at a corresponding gear according to the gear control signal, and controls the display circuit to output corresponding gear information; the power supply circuit supplies power to the automatic induction bubble circuit, and the control circuit outputs corresponding electric quantity information through the display circuit; the infrared detection circuit is used for transmitting a human body induction signal in an induction area to the control circuit, and the control circuit is used for opening and closing the foaming circuit according to the human body induction signal. The utility model discloses a different gears are bubbled, realize automatic bubble through responding to the human body, show gear information and electric quantity information in real time, improve and use experience.

Description

Auto-induction bubbling circuit and hand washer

Technical Field

The utility model relates to a hand washing device technical field, in particular to auto-induction frothing circuit and hand washer.

Background

At present, most of existing extrusion type hand washers do not have the function of automatically sensing liquid outlet, liquid outlet is achieved by manual pressing, a liquid outlet of a liquid outlet pump contacts with hands of a user for a long time and is very easy to be polluted, liquid or gel-like hand sanitizer pumped out by the hand washers needs the user to manually wash out bubbles, but the bubbles washed out by manual washing are not fine and smooth enough, and the effect of deep cleaning cannot be achieved. The hand washer with the foaming function does not have the function of displaying foaming gear information and electric quantity information, a user needs to pump out the hand sanitizer again or wash the hand sanitizer for a longer time according to the foam condition after the hand washer foams, the foaming gear cannot be selected before the foaming, and whether the hand sanitizer cannot be discharged or not can not be directly judged due to insufficient residual electric quantity, so that the hand washer cannot be charged in time under the low-power condition, and the use experience is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an auto-induction bubbling circuit adopts different gears to bubble, realizes automatic bubble through responding to the human body, shows gear information and electric quantity information in real time, improves and uses experience.

In order to achieve the above object, the utility model provides an auto-induction bubbling circuit is applied to the hand washer, include: the control circuit, and a key circuit, a power circuit, an infrared detection circuit, a bubble circuit and a display circuit which are respectively and electrically connected with the control circuit; wherein,

the key circuit is used for triggering a switch control signal or a gear control signal;

the control circuit is used for controlling the foaming circuit to start and work according to the trigger switch control signal, controlling the foaming circuit to work at a corresponding gear according to the gear control signal, and controlling the display circuit to output corresponding gear information;

the power supply circuit is used for supplying power to the automatic induction bubbling circuit, and the control circuit acquires the electric quantity of the power supply circuit and outputs corresponding electric quantity information through the display circuit;

the infrared detection circuit is used for detecting a human body induction signal in an induction area of the infrared detection circuit and transmitting the human body induction signal to the control circuit, and the control circuit is used for opening and closing the foaming circuit according to the human body induction signal.

In an embodiment, the auto-induction bubbling circuit further includes a memory, the memory is connected to the control circuit, the memory is used for storing the gear control signal before power failure, and when power is turned on again, the control circuit starts the bubbling circuit according to the gear control signal stored in the memory.

In an embodiment, the display circuit includes a light emitting display component, and the control circuit is further configured to control the light emitting display component of the display circuit to operate when it is detected that the power level of the power supply circuit is less than or equal to a preset low power threshold.

In one embodiment, the light emitting display assembly is provided with at least one digital display tube.

In one embodiment, the power circuit includes a power supply circuit and a charging management circuit connected to the power supply circuit, and the charging management circuit is connected to an external power source via a charging interface and is configured to charge the power supply circuit.

In one embodiment, the voltage detection pin of the control circuit is connected to the charge management circuit.

In an embodiment, the power supply circuit further includes a battery protection circuit, the battery protection circuit is connected between the charging management circuit and the power supply circuit, and the electric quantity detection pin of the control circuit is connected to the output end of the power supply circuit.

In an embodiment, the charging interface adopts a USB Type-C charging interface.

In an embodiment, the bubble generating circuit comprises a bubble generating power supply circuit and an air pump driving circuit, the control end of the control circuit is connected with the bubble generating power supply circuit, the output end of the bubble generating power supply circuit is connected with the air pump driving circuit and used for supplying power to the air pump driving circuit, and the output end of the control circuit is connected with the air pump driving circuit and used for controlling the air pump driving circuit to work.

The utility model discloses a second main objective lies in providing a hand washer adopts different gears to bubble, realizes automatic bubble of going out through the response human body, shows gear information and electric quantity information in real time, improves and uses experience.

In order to achieve the above objects, the present invention provides a hand washer, including a hand washer body and an auto-induction bubble circuit as one of the main objects of the present invention, the auto-induction bubble circuit is located the hand washer body.

Compared with the prior art the utility model discloses following beneficial effect has:

when the automatic induction foaming circuit works, the foaming circuit pumps out the foam-shaped hand sanitizer through the foaming pump, and the cleaning effect is optimized through the more delicate foam hand sanitizer; a user adjusts the gear corresponding to the foaming circuit according to actual needs, the key circuit is used for triggering a switch control signal or a gear control signal, the foaming circuit is opened and closed by the controller according to the switch control signal, and the foaming circuit is driven to foam according to the gear control signal and corresponding gear information; displaying corresponding gear information through a display circuit; the power supply circuit supplies power to the auto-induction bubble circuit, the control circuit outputs corresponding electric quantity information through the display circuit after detecting the electric quantity of the power supply circuit, a user can visually know the electric quantity information according to the displayed electric quantity, power is timely connected in a low-power state, the situation of insufficient electric quantity is avoided, the situation that bubbles cannot be formed due to insufficient electric quantity can be judged by observing the displayed residual electric quantity, and the use experience is improved; the infrared detection circuit detects human body induction signals in the induction area, and if a human body is detected in the induction area, the control circuit drives the frothing circuit to automatically start frothing.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic diagram of functional modules of an embodiment of an auto-induction bubbling circuit according to the present invention;

fig. 2 is a schematic diagram of the circuit structure of the key circuit and the control circuit of the present invention;

fig. 3 is a schematic diagram of the circuit structure of the infrared detection circuit of the present invention;

fig. 4 is a schematic circuit diagram of a display circuit according to the present invention;

fig. 5 is a schematic circuit diagram of the charging management circuit of the present invention;

fig. 6 is a schematic circuit structure diagram of the battery protection circuit and the power supply circuit of the present invention;

fig. 7 is a schematic circuit diagram of the bubbling power circuit of the present invention;

fig. 8 is a schematic circuit diagram of the air pump driving circuit of the present invention.

In the figure: 100. a control circuit; 101. a memory; 200. a key circuit; 300. a power supply circuit; 301. a charging management circuit; 302. a power supply circuit; 303. a battery protection circuit; 400. an infrared detection circuit; 500. a bubble generating circuit; 501. a foam power supply circuit; 502. an air pump drive circuit; 600. a display circuit.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if all the directional indicators in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a certain posture, if the certain posture is changed, the directional indicator is also changed accordingly.

If in the present application the description referring to "first", "second", etc. is used for descriptive purposes only and not to be construed as indicating or implying a relative importance or implying a number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. If in the present invention a description of "a and/or B" is referred to, this means either comprising scheme a or scheme B, or comprising scheme a and scheme B. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides an auto-induction bubbling circuit.

Referring to fig. 1 to 8, an auto-induction bubble circuit for use in a hand washer, comprising: the device comprises a control circuit 100, and a key circuit 200, a power circuit 300, an infrared detection circuit 400, a bubble circuit 500 and a display circuit 600 which are respectively electrically connected with the control circuit 100; wherein,

the key circuit 200 is used for triggering a switch control signal or a gear control signal;

the control circuit 100 is configured to control the bubble generating circuit to start and operate according to the trigger switch control signal, control the bubble generating circuit to operate at a corresponding gear according to the gear control signal, and control the display circuit to output corresponding gear information;

the power circuit 300 is configured to supply power to the auto-induction bubbling circuit, and the control circuit detects the electric quantity of the power circuit and outputs corresponding electric quantity information through the display circuit;

the infrared detection circuit 400 is configured to detect a human body sensing signal in a sensing area thereof, and transmit the human body sensing signal to the control circuit, and the control circuit is configured to open and close the bubble generating circuit according to the human body sensing signal.

The foaming circuit 500 pumps out the foam hand sanitizer, and the cleaning effect is optimized through the more exquisite foam hand sanitizer; a user adjusts the gear corresponding to the foaming circuit 500 according to actual needs, the key circuit 200 is used for triggering a switch control signal or a gear control signal, the controller opens and closes the foaming circuit 500 according to the switch control signal, and the foaming circuit 500 is driven to foam according to the gear control signal and corresponding gear information; displaying the corresponding gear information through the display circuit 600; the power supply circuit 300 is used for supplying power to the automatic induction bubbling circuit, the control circuit 100 outputs corresponding electric quantity information through the display circuit 600 after the electric quantity of the power supply circuit is obtained, a user can visually know the electric quantity information according to the displayed electric quantity, power connection is timely carried out in a low-power state, the situation of insufficient electric quantity is avoided, the situation that bubbles cannot be formed due to insufficient electric quantity can be judged by observing the displayed residual electric quantity, and the use experience is improved; the infrared detection circuit 400 detects a human body sensing signal in the sensing area, and if a human body is detected in the sensing area, the control circuit 100 drives the bubble generating circuit 500 to automatically start bubble generation.

Specifically, under the condition that the utility model is not limited, the automatic induction bubbling circuit can be started by a key, and a user starts the bubbling circuit by a key assembly of the key circuit to realize bubbling and bubbling; or through infrared induction, when the infrared detection circuit senses that the hand is close to, the bubbling is automatically started.

Here, the control circuit 100 is configured to output a PWM control signal according to the human body sensing signal to turn on and off the bubble making circuit 500, and the control circuit 100 controls the number of bubbles making steps of the bubble making circuit 500 by adjusting a PWM pulse duty ratio.

The main control chip of the control circuit 100 may be implemented by a single chip, specifically, by one of PIC16F685/687/689/690 series single chips, and in some other embodiments, may also be implemented by a programmable logic controller PLC, which is not limited herein. Those skilled in the art can output the PWM control signal with preset parameters by integrating some hardware circuits and software programs or algorithms in the main control chip, and output the PWM control signal to other functional modules of the application device by using various output ports and lines. One skilled in the art can also output the control signal through other functional modules to control the operating state of the main control chip, so as to control the relevant parameters of the PWM control signal.

Preferably, the main control chip adopts AS275N-16A chip, AS shown in fig. 2, in order to simplify the operation, the automatic induction bubbling circuit of the present invention adopts a one-key control, and by setting an operation button K1 to input a switch control signal or a gear control signal, the pin K1 of the main control chip is connected with the operation button K1 and then grounded.

As an example, the main control chip of the present invention is provided with a clock circuit (not shown) for timing to control the operation time in cooperation with the auto-induction bubbling circuit.

As an example, the auto-induction bubbling circuit is applied to a hand washer, and an operation button is led out of the hand washer through a corresponding opening or slot of the hand washer or is arranged outside the hand washer. When the power supply circuit is implemented, the side key is pressed for 2 seconds, the control circuit starts the power supply circuit to start according to the switch control signal or the gear control signal, the light-emitting display assembly of the display circuit is driven to emit light to display so as to prompt the power supply circuit to start, and the display circuit is driven to display a corresponding electric quantity value according to the acquired electric quantity of the power supply circuit.

As shown in fig. 3, the infrared detection circuit 400 includes a photodiode IR, a switching tube Q1, a switching tube OP, resistors R8, R9, R10, and a capacitor C9, specifically, a cathode of the photodiode IR is connected to a collector of the switching tube Q1 via a resistor R9, a base of the switching tube Q1 is connected to an IR pin of the main control chip via a resistor R8, an emitter of the switching tube Q1 is grounded, an anode of the photodiode IR is connected to a control terminal VDD of the main control chip and the collector of the switching tube OP, an emitter of the switching tube OP is connected to a first end of the resistor R10, a first end of the capacitor C9, and an IRM1 pin of the main control chip U4, and a second end of the resistor R10 and a second end of the capacitor C9 are grounded, respectively.

Specifically, any one of the switching tubes such as a triode, a MOS tube, an IGBT and the like may be used as the switching tube, and an NPN triode may be used as the switching tubes Q1, OP.

Preferably, the sensing area of the infrared detection circuit 400 is mainly the sensing range of the photodiode, in the present invention, the sensing area is the range of the photodiode as the center to radiate 6cm outwards, and the solar interference can be resisted within the range, and within the range, when the hand is detected to be close to the hand washer, the control circuit 100 starts the bubble-making circuit 500 to make bubbles, and the bubbles can not be disturbed to cause delay or fail to make bubbles at once.

In an embodiment, the controller further includes a memory 101, the memory 101 is connected to the control circuit 100, the memory 101 is configured to store the gear control signal before power failure, and when power is turned on again, the control circuit 100 activates the bubble generating circuit 500 according to the gear control signal stored in the memory 101.

In the specific implementation process, the automatic induction bubbling circuit has a memory function, the current gear is stored when the automatic shutdown is carried out by long press or standby, and the next startup default is the gear when the shutdown is carried out under the condition that the battery is not powered off. When the engine is started next time, the gear when the engine is shut down for the last time is directly foamed, repeated gear adjustment is avoided, and use experience is influenced.

Here, according to different requirements of actual use, the memory 101 and the main control chip may be integrated on the same circuit board; or a main control chip with a memory function is adopted, where the memory 101 refers to a memory cell integrated in the main control chip.

In an embodiment, the memory 101 is configured to store a low power threshold, and when it is detected that the power of the power circuit 300 is less than or equal to the preset low power threshold, the control circuit 100 drives the light emitting display element of the display circuit 600 to operate.

In order to avoid that the automatic sensing bubbling circuit can not drive bubbling when the electric quantity is low, a low electric quantity threshold value is set, and a user is reminded to charge when the residual electric quantity is low, wherein the low electric quantity threshold value refers to that the low electric quantity threshold value is set to be not higher than 20% based on the consideration of practical application and by taking the consumed electric quantity in a certain time period, the conventional electric quantity consumed in the daily using process or the insufficient support for the automatic sensing bubbling circuit to drive the bubbling circuit 500 to bubble for a plurality of times.

Specifically, the auto-induction bubbling circuit has a low power prompting function, and in the specific implementation process, the low power threshold is set to be 0-5%, and when the control circuit 100 detects that the power of the power circuit is less than or equal to 5% of the preset low power threshold, the light-emitting display module of the driving display circuit 600 works

Here, the working state of the light emitting display device may be set corresponding to a low power state, and when the light emitting display device is in the low power state, the control circuit 100 drives the light emitting display device of the display circuit 600 to emit light in a preset working state corresponding to the low power state.

Specifically, when the display circuit adopts a light-emitting display component such as a nixie tube, an LED bulb, a lamp set, or the like, the user can be prompted by flashing or changing the frequency of stroboflash, or by displaying any display mode having a prompt function such as prompt information when the display circuit adopts a light-emitting display component such as a display screen, or the like. Of course, without limiting the present invention, a buzzer or other sounding device may be added to remind the user.

As a further preferable example, the luminous display assembly is provided with at least one digital display tube.

Specifically, the control circuit 100 generates a gear control signal according to the switch control signal or the gear control signal, and drives the nixie tube of the display circuit 600 to display corresponding gear information in a digital form according to the switch control signal or the gear control signal; after detecting the electric quantity of the power circuit 300, the control circuit 100 displays the electric quantity information corresponding to the current state in a digital form through the nixie tube of the display circuit 600, wherein the electric quantity information includes the detected current electric quantity value, and when detecting that the electric quantity of the power circuit 300 is less than or equal to a preset low electric quantity threshold value, the nixie tube of the display circuit 600 is driven to remind a user that the residual electric quantity is low in a flashing, color temperature changing, brightness changing and other forms. Further, in the utility model discloses in the example, when the battery power is less than 5%, control digital display pipe scintillation suggestion.

Furthermore, the digital display tube adopts a three-position digital display tube, and the color temperature and the brightness of the digital display tube are adjustable.

As shown in fig. 4, the display circuit 600 includes a nixie tube LED, and pins (1-6) of the nixie tube LED are connected to a plurality of display control terminals of the control circuit via resistors (R11-R16), respectively.

In an embodiment, the power circuit 300 includes a power circuit 302 and a charging management circuit 301 connected to the power circuit, wherein the charging management circuit 301 is connected to an external power source via a charging interface for supplying power to the power circuit 302. It is not right the utility model discloses under the condition that causes the restriction, external power source can via the interface that charges with supply circuit connects.

In an embodiment, the charging interface adopts a USB Type-C charging interface.

In an embodiment, the voltage detection pin of the control circuit 100 is connected to the charging management circuit 301, and is used for detecting the charging voltage of the charging management circuit to prevent the service life from being affected by overvoltage.

Specifically, as shown in fig. 5, the charging management circuit 301 adopts a charging chip U1 of ME4057-N, a TEMP pin and a GND pin of the charging chip U1 are grounded, a PROG pin is grounded via a resistor R1, a VCC pin of the charging chip U1 is connected to a common terminal of a first end of a capacitor C1, a common terminal of a first end of a capacitor C1 and a common terminal of a first end of a resistor R6 are connected to 2V + pins of the charging interface, a CE pin of the charging chip U1 is connected to a common terminal of a first end of a resistor R6, a common terminal of a second end of a resistor R6 is connected to a USB pin of a voltage detection pin of the main control chip U4, a common terminal of a second end of R6 is connected to a first end of a resistor R7 and a first end of a capacitor C8, a second end of a resistor R7 and a second end of a capacitor C8 are grounded, and a loop is formed by the resistor R7 and the capacitor C8 to protect the charging management circuit from overvoltage; the common end of the BAT pin of the charging chip U1 is grounded through a capacitor C2, the power supply circuit is connected with the common end of the BAT pin of the charging chip U1, and the 2 GND pins of the charging interface are grounded.

In an embodiment, the power supply circuit 302 further includes a battery protection circuit 303, the battery protection circuit 303 is connected between the charge management circuit 301 and the power supply circuit 302, and a power detection pin of the control circuit is connected to an output terminal of the power supply circuit.

The battery protection circuit is used for carrying out power supply protection on the power supply circuit, and the control circuit is used for detecting the electric quantity of the power supply circuit so as to drive the display circuit to output corresponding electric quantity information.

Specifically, as shown in fig. 6, a first end of a resistor R3 of the battery protection circuit 303 is connected to a positive power supply terminal B + and the charge management circuit, a common terminal of a second end is connected to a VDD pin of a circuit protection chip U2, a first end of a capacitor C3 is connected to a common terminal of a second end of a resistor R3, and a second end of a capacitor C3 is connected to a GND pin of a circuit protection chip U2 and a negative power supply terminal B —; the VM pin of the circuit protection chip U2 is connected to ground. Here R3 is a transmit power adjustment resistor. The circuit protection chip adopts a DW03A chip and is used for performing overcurrent protection on the power supply circuit.

The common end of the first end of the resistor R4 of the power supply circuit 302 is connected with the pin VIN of the input end of the power supply chip U3 and the positive electrode B + of the power supply, the common end of the second end of the resistor R4 is connected with the pin BAT of the electric quantity detection pin of the main control chip U4, the common end of the second end of the resistor R4 is respectively connected with the first end of the resistor R5 and the first end of the capacitor C14, and the second end of the resistor R5 and the second end of the capacitor C14 are respectively grounded; an input end VIN pin of the power supply chip U3 is connected with a first end of the capacitor C4 and a first end of the capacitor C5, and an output end OUT pin of the power supply chip U3 is connected with a first end of the capacitor C6, a first end of the capacitor C7 and a control end VDD pin of the main control chip U4; the first end of the capacitor C4 and the first end of the capacitor C5 are respectively connected to the pin VIN of the input terminal of the power supply chip U3, and the second end of the capacitor C4, the second end of the capacitor C5, the second end of the capacitor C6, the second end of the capacitor C7, and the pin GND of the power supply chip U3 are respectively grounded.

In an embodiment, the bubble generating circuit 500 includes a bubble generating power circuit 501 and an air pump driving circuit 502, the control end of the control circuit 100 is connected to the bubble generating power circuit 501, the output end of the bubble generating power circuit 501 is connected to the air pump driving circuit 502 for supplying power to the air pump driving circuit 502, and the output end of the control circuit 100 is connected to the air pump driving circuit 502 for controlling the air pump driving circuit 502 to operate.

As shown in fig. 7, a first end of the resistor R24 of the bubbling power supply circuit 501 is connected to the EN pin of the main control chip U4, and a common end of a second end is grounded via the resistor R25; the EN pin of the bubble power supply chip U5 is connected with the common end of the second end of the resistor R24; the common end of a VCC pin of the foaming power supply chip U5 is respectively connected with a power supply anode B +, a first end of a capacitor C10 and a first end of a capacitor C11, and a second end of a capacitor C10 and a second end of a capacitor C11 are respectively grounded; the common end of a VCC pin of the foam power supply chip U5 is connected with the common end of an LX pin of the foam power supply chip U5 through a first inductor L1, the common end of the LX pin of the foam power supply chip U5 is connected with the anode of a diode D2, the diode D2 is used for circuit instant rectification, the common end of the cathode of the diode D2 is respectively connected with the first end of a capacitor C12, the first end of a capacitor C13 and the power supply end of an air pump driving circuit, and the second end of the capacitor C12 and the second end of the capacitor C13 are respectively grounded; the first end of the resistor R23 is connected with the common end of the cathode of the diode D2, the common end of the second end of the resistor R23 is grounded through the resistor R22, and the FB pin of the bubble power supply chip U5 is connected with the common end of the second end of the resistor R23; the GND pin of the bubble power supply chip U5 is grounded.

As shown in fig. 8, the cathode of the diode D1 of the air pump driving circuit 502 is connected to the anode of the air pump, and is connected to the power supply terminal of the air pump driving circuit through the resistors R19 and R20, respectively, and the anode of the diode D1 is connected to the cathode of the air pump and the drain of the MOS transistor Q2, respectively; the common end of the base electrode of the MOS tube is connected with the OUT pin of the main control chip through a resistor R17, the first end of a resistor R18 is connected with the common end of the base electrode of the MOS tube, and the second end of the resistor R18 and the source electrode of the MOS tube are respectively grounded.

A hand washer comprises a hand washer body and the automatic induction foaming circuit, wherein the automatic induction foaming circuit is arranged on the hand washer body.

When the air pump is implemented, the side key is pressed for 2 seconds, the control circuit starts the starting according to the switch control signal, then the light-emitting display assembly of the display circuit is driven to emit light to display so as to prompt the starting, the display circuit is driven to display a corresponding electric quantity value according to the acquired electric quantity of the power circuit, the three-position digital display tube of the display circuit is bright blue, and a number '001' is displayed, so that the air pump gear is in the 1 st gear; after displaying for 2 seconds, the current corresponding electric quantity value is switched to, and the electric quantity value is continuously displayed for 3 seconds.

In a starting state, if the foaming air pump needs to be switched to the 2 nd gear, the key needs to be pressed again for switching, the control circuit displays the number of 002 through the digital display tube according to the switch control signal or the gear control signal, and if the key is not pressed again, the air pump can be maintained to work at the 2 nd gear; if the gear is to be switched, the key is continuously pressed within 2 seconds of switching to the 2 nd gear, the control circuit switches to the 3 rd gear according to the switch control signal or the gear control signal, and drives the digital display tube to display the number '003'.

It should be noted that, if the gear 2 is switched to the gear 3 quickly, the button needs to be pressed once within 2 seconds of switching to the gear 2, and if the gear 3 needs to be switched during use, the gear 3 can be switched by pressing the button once; or the touch key is used for starting the automatic induction bubbling circuit to a gear adjusting state and then pressing the key once again to switch to the 3 rd gear.

As an example, the foaming circuit is provided with 3 grades, and in the 1 st grade, the air pump works for 0.5 second, namely the foam is pumped out after 0.5 second of foaming; at the 2 nd gear, the air pump works for 1 second, namely the foam is pumped out after being foamed for 1 second; at gear 3, the air pump is operated for 1.5 seconds, i.e. foam is pumped out after 1.5 seconds of frothing. When the gear number is switched every time, the control circuit drives the nixie tube to display the current corresponding electric quantity in the working time of the air pump.

Optionally, the utility model discloses a hand washer can be in standby state when not using for a long time, and further, treat the chance auto-off for a long time. The current gear is saved when the battery is turned off by long press or automatically turned off in a standby mode, and the next time the battery is turned on under the condition of no power failure, the gear is default to the gear when the battery is turned off.

Under the standby state, the digital display tube is not bright, the electric quantity can be displayed at normal brightness and color temperature when the key is touched lightly, the electric quantity can be displayed for 3 seconds continuously, the side key is pressed for 2 seconds when the power-OFF is carried out, and OFF can be displayed on the digital display tube in the key pressing process.

When charging, the control circuit can be according to the electric quantity that detects, through the electric quantity value of digital display pipe real-time display charging process in.

The above is only the optional embodiment of the present invention, and not therefore the limit of the patent scope of the present invention, all of which are in the concept of the present invention, the equivalent structure transformation of the content of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.

Claims (10)

1. An auto-induction bubble circuit for use in a hand cleaner, comprising: the control circuit, and a key circuit, a power circuit, an infrared detection circuit, a bubble circuit and a display circuit which are respectively and electrically connected with the control circuit; wherein,

the key circuit is used for triggering a switch control signal or a gear control signal;

the control circuit is used for controlling the foaming circuit to start to work according to the trigger switch control signal, controlling the foaming circuit to work at a corresponding gear according to the gear control signal, and controlling the display circuit to output corresponding gear information;

the power supply circuit is used for supplying power to the automatic induction bubbling circuit, and the control circuit acquires the electric quantity of the power supply circuit and outputs corresponding electric quantity information through the display circuit;

the infrared detection circuit is used for detecting a human body induction signal in an induction area of the infrared detection circuit and transmitting the human body induction signal to the control circuit, and the control circuit is used for opening and closing the foaming circuit according to the human body induction signal.

2. The auto-induction frothing circuit of claim 1 further comprising a memory, the memory being coupled to the control circuit, the memory being configured to store the gear control signal prior to a power failure, and upon a power re-up, the control circuit activating the frothing circuit in accordance with the gear control signal stored by the memory.

3. The auto-induction bubbling circuit according to claim 2, wherein the display circuit comprises a light-emitting display component, and the control circuit is further configured to control the light-emitting display component of the display circuit to operate when it is detected that the power level of the power supply circuit is less than or equal to a preset low power threshold.

4. The auto-induction bubbling circuit according to claim 3, wherein the luminous display assembly is provided with at least one digital display tube.

5. The auto-induction frothing circuit of claim 1 wherein the power circuit comprises a power supply circuit and a charging management circuit connected to the power supply circuit, the charging management circuit being connected to an external power source via a charging interface for charging the power supply circuit.

6. The auto-induction frothing circuit of claim 5, wherein a voltage detection pin of the control circuit is connected with the charge management circuit.

7. The automatic induction bubbling circuit of claim 5, wherein the power circuit further comprises a battery protection circuit, the battery protection circuit is connected between the charging management circuit and the power supply circuit, and the power detection pin of the control circuit is connected with the output terminal of the power supply circuit.

8. The auto-induction frothing circuit of claim 5 wherein the charging interface is a USB Type-C charging interface.

9. The automatic induction bubbling circuit according to any one of claims 1 to 8, wherein the bubbling circuit comprises a bubbling power supply circuit and an air pump driving circuit, a control end of the control circuit is connected with the bubbling power supply circuit, an output end of the bubbling power supply circuit is connected with the air pump driving circuit and used for supplying power to the air pump driving circuit, and an output end of the control circuit is connected with the air pump driving circuit and used for controlling the air pump driving circuit to work.

10. A hand cleaner comprising a hand cleaner body and an auto-induction frothing circuit as claimed in any one of claims 1 to 9 provided in the hand cleaner body.

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